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bellard31e31b82003-02-18 22:55:36 +00001/* This is the Linux kernel elf-loading code, ported into user space */
Peter Maydelld39594e2016-01-26 18:17:02 +00002#include "qemu/osdep.h"
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003#include <sys/param.h>
bellard31e31b82003-02-18 22:55:36 +00004
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03005#include <sys/resource.h>
bellard31e31b82003-02-18 22:55:36 +00006
bellard3ef693a2003-03-23 20:17:16 +00007#include "qemu.h"
Paolo Bonzini76cad712012-10-24 11:12:21 +02008#include "disas/disas.h"
Veronia Bahaaf348b6d2016-03-20 19:16:19 +02009#include "qemu/path.h"
bellard31e31b82003-02-18 22:55:36 +000010
malce58ffeb2009-01-14 18:39:49 +000011#ifdef _ARCH_PPC64
malca6cc84f2008-08-20 22:39:28 +000012#undef ARCH_DLINFO
13#undef ELF_PLATFORM
14#undef ELF_HWCAP
Peter Maydellad6919d2014-05-02 14:45:15 +010015#undef ELF_HWCAP2
malca6cc84f2008-08-20 22:39:28 +000016#undef ELF_CLASS
17#undef ELF_DATA
18#undef ELF_ARCH
19#endif
20
Mika Westerbergedf8e2a2009-04-07 09:57:11 +030021#define ELF_OSABI ELFOSABI_SYSV
22
blueswir1cb33da52007-10-09 16:34:29 +000023/* from personality.h */
24
25/*
26 * Flags for bug emulation.
27 *
28 * These occupy the top three bytes.
29 */
30enum {
Richard Hendersond97ef722010-07-27 10:25:29 -070031 ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
32 FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to
33 descriptors (signal handling) */
34 MMAP_PAGE_ZERO = 0x0100000,
35 ADDR_COMPAT_LAYOUT = 0x0200000,
36 READ_IMPLIES_EXEC = 0x0400000,
37 ADDR_LIMIT_32BIT = 0x0800000,
38 SHORT_INODE = 0x1000000,
39 WHOLE_SECONDS = 0x2000000,
40 STICKY_TIMEOUTS = 0x4000000,
41 ADDR_LIMIT_3GB = 0x8000000,
blueswir1cb33da52007-10-09 16:34:29 +000042};
43
44/*
45 * Personality types.
46 *
47 * These go in the low byte. Avoid using the top bit, it will
48 * conflict with error returns.
49 */
50enum {
Richard Hendersond97ef722010-07-27 10:25:29 -070051 PER_LINUX = 0x0000,
52 PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
53 PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
54 PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
55 PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
56 PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS | SHORT_INODE,
57 PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
58 PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
59 PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
60 PER_BSD = 0x0006,
61 PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
62 PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
63 PER_LINUX32 = 0x0008,
64 PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
65 PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
66 PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
67 PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
68 PER_RISCOS = 0x000c,
69 PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
70 PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
71 PER_OSF4 = 0x000f, /* OSF/1 v4 */
72 PER_HPUX = 0x0010,
73 PER_MASK = 0x00ff,
blueswir1cb33da52007-10-09 16:34:29 +000074};
75
76/*
77 * Return the base personality without flags.
78 */
Richard Hendersond97ef722010-07-27 10:25:29 -070079#define personality(pers) (pers & PER_MASK)
blueswir1cb33da52007-10-09 16:34:29 +000080
bellard83fb7ad2004-07-05 21:25:26 +000081/* this flag is uneffective under linux too, should be deleted */
82#ifndef MAP_DENYWRITE
83#define MAP_DENYWRITE 0
84#endif
85
86/* should probably go in elf.h */
87#ifndef ELIBBAD
88#define ELIBBAD 80
89#endif
90
Richard Henderson28490232010-07-27 10:25:31 -070091#ifdef TARGET_WORDS_BIGENDIAN
92#define ELF_DATA ELFDATA2MSB
93#else
94#define ELF_DATA ELFDATA2LSB
95#endif
96
Paolo Bonzinia29f9982013-04-17 16:26:37 +020097#ifdef TARGET_ABI_MIPSN32
Paolo Bonzini918fc542013-04-17 16:26:42 +020098typedef abi_ullong target_elf_greg_t;
99#define tswapreg(ptr) tswap64(ptr)
Paolo Bonzinia29f9982013-04-17 16:26:37 +0200100#else
101typedef abi_ulong target_elf_greg_t;
102#define tswapreg(ptr) tswapal(ptr)
103#endif
104
Nathan Froyd21e807f2009-12-11 09:04:46 -0800105#ifdef USE_UID16
Paolo Bonzini1ddd5922013-04-17 16:26:39 +0200106typedef abi_ushort target_uid_t;
107typedef abi_ushort target_gid_t;
Nathan Froyd21e807f2009-12-11 09:04:46 -0800108#else
Paolo Bonzinif8fd4fc2013-04-17 16:26:40 +0200109typedef abi_uint target_uid_t;
110typedef abi_uint target_gid_t;
Nathan Froyd21e807f2009-12-11 09:04:46 -0800111#endif
Paolo Bonzinif8fd4fc2013-04-17 16:26:40 +0200112typedef abi_int target_pid_t;
Nathan Froyd21e807f2009-12-11 09:04:46 -0800113
bellard30ac07d2003-04-07 21:33:03 +0000114#ifdef TARGET_I386
115
bellard15338fd2005-11-26 11:41:16 +0000116#define ELF_PLATFORM get_elf_platform()
117
118static const char *get_elf_platform(void)
119{
120 static char elf_platform[] = "i386";
Andreas Färbera2247f82013-06-09 19:47:04 +0200121 int family = object_property_get_int(OBJECT(thread_cpu), "family", NULL);
bellard15338fd2005-11-26 11:41:16 +0000122 if (family > 6)
123 family = 6;
124 if (family >= 3)
125 elf_platform[1] = '0' + family;
126 return elf_platform;
127}
128
129#define ELF_HWCAP get_elf_hwcap()
130
131static uint32_t get_elf_hwcap(void)
132{
Andreas Färbera2247f82013-06-09 19:47:04 +0200133 X86CPU *cpu = X86_CPU(thread_cpu);
134
135 return cpu->env.features[FEAT_1_EDX];
bellard15338fd2005-11-26 11:41:16 +0000136}
137
j_mayer84409dd2007-04-06 08:56:50 +0000138#ifdef TARGET_X86_64
139#define ELF_START_MMAP 0x2aaaaab000ULL
j_mayer84409dd2007-04-06 08:56:50 +0000140
141#define ELF_CLASS ELFCLASS64
j_mayer84409dd2007-04-06 08:56:50 +0000142#define ELF_ARCH EM_X86_64
143
144static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
145{
146 regs->rax = 0;
147 regs->rsp = infop->start_stack;
148 regs->rip = infop->entry;
149}
150
Mika Westerberg9edc5d72009-04-07 09:57:59 +0300151#define ELF_NREG 27
Anthony Liguoric227f092009-10-01 16:12:16 -0500152typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
Mika Westerberg9edc5d72009-04-07 09:57:59 +0300153
154/*
155 * Note that ELF_NREG should be 29 as there should be place for
156 * TRAPNO and ERR "registers" as well but linux doesn't dump
157 * those.
158 *
159 * See linux kernel: arch/x86/include/asm/elf.h
160 */
Andreas Färber05390242012-02-25 03:37:53 +0100161static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
Mika Westerberg9edc5d72009-04-07 09:57:59 +0300162{
163 (*regs)[0] = env->regs[15];
164 (*regs)[1] = env->regs[14];
165 (*regs)[2] = env->regs[13];
166 (*regs)[3] = env->regs[12];
167 (*regs)[4] = env->regs[R_EBP];
168 (*regs)[5] = env->regs[R_EBX];
169 (*regs)[6] = env->regs[11];
170 (*regs)[7] = env->regs[10];
171 (*regs)[8] = env->regs[9];
172 (*regs)[9] = env->regs[8];
173 (*regs)[10] = env->regs[R_EAX];
174 (*regs)[11] = env->regs[R_ECX];
175 (*regs)[12] = env->regs[R_EDX];
176 (*regs)[13] = env->regs[R_ESI];
177 (*regs)[14] = env->regs[R_EDI];
178 (*regs)[15] = env->regs[R_EAX]; /* XXX */
179 (*regs)[16] = env->eip;
180 (*regs)[17] = env->segs[R_CS].selector & 0xffff;
181 (*regs)[18] = env->eflags;
182 (*regs)[19] = env->regs[R_ESP];
183 (*regs)[20] = env->segs[R_SS].selector & 0xffff;
184 (*regs)[21] = env->segs[R_FS].selector & 0xffff;
185 (*regs)[22] = env->segs[R_GS].selector & 0xffff;
186 (*regs)[23] = env->segs[R_DS].selector & 0xffff;
187 (*regs)[24] = env->segs[R_ES].selector & 0xffff;
188 (*regs)[25] = env->segs[R_FS].selector & 0xffff;
189 (*regs)[26] = env->segs[R_GS].selector & 0xffff;
190}
191
j_mayer84409dd2007-04-06 08:56:50 +0000192#else
193
bellard30ac07d2003-04-07 21:33:03 +0000194#define ELF_START_MMAP 0x80000000
195
bellard30ac07d2003-04-07 21:33:03 +0000196/*
197 * This is used to ensure we don't load something for the wrong architecture.
198 */
199#define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
200
201/*
202 * These are used to set parameters in the core dumps.
203 */
Richard Hendersond97ef722010-07-27 10:25:29 -0700204#define ELF_CLASS ELFCLASS32
Richard Hendersond97ef722010-07-27 10:25:29 -0700205#define ELF_ARCH EM_386
bellard30ac07d2003-04-07 21:33:03 +0000206
Richard Hendersond97ef722010-07-27 10:25:29 -0700207static inline void init_thread(struct target_pt_regs *regs,
208 struct image_info *infop)
bellardb346ff42003-06-15 20:05:50 +0000209{
210 regs->esp = infop->start_stack;
211 regs->eip = infop->entry;
pbrooke5fe0c52006-06-11 13:32:59 +0000212
213 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
214 starts %edx contains a pointer to a function which might be
215 registered using `atexit'. This provides a mean for the
216 dynamic linker to call DT_FINI functions for shared libraries
217 that have been loaded before the code runs.
218
219 A value of 0 tells we have no such handler. */
220 regs->edx = 0;
bellardb346ff42003-06-15 20:05:50 +0000221}
Mika Westerberg9edc5d72009-04-07 09:57:59 +0300222
Mika Westerberg9edc5d72009-04-07 09:57:59 +0300223#define ELF_NREG 17
Anthony Liguoric227f092009-10-01 16:12:16 -0500224typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
Mika Westerberg9edc5d72009-04-07 09:57:59 +0300225
226/*
227 * Note that ELF_NREG should be 19 as there should be place for
228 * TRAPNO and ERR "registers" as well but linux doesn't dump
229 * those.
230 *
231 * See linux kernel: arch/x86/include/asm/elf.h
232 */
Andreas Färber05390242012-02-25 03:37:53 +0100233static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
Mika Westerberg9edc5d72009-04-07 09:57:59 +0300234{
235 (*regs)[0] = env->regs[R_EBX];
236 (*regs)[1] = env->regs[R_ECX];
237 (*regs)[2] = env->regs[R_EDX];
238 (*regs)[3] = env->regs[R_ESI];
239 (*regs)[4] = env->regs[R_EDI];
240 (*regs)[5] = env->regs[R_EBP];
241 (*regs)[6] = env->regs[R_EAX];
242 (*regs)[7] = env->segs[R_DS].selector & 0xffff;
243 (*regs)[8] = env->segs[R_ES].selector & 0xffff;
244 (*regs)[9] = env->segs[R_FS].selector & 0xffff;
245 (*regs)[10] = env->segs[R_GS].selector & 0xffff;
246 (*regs)[11] = env->regs[R_EAX]; /* XXX */
247 (*regs)[12] = env->eip;
248 (*regs)[13] = env->segs[R_CS].selector & 0xffff;
249 (*regs)[14] = env->eflags;
250 (*regs)[15] = env->regs[R_ESP];
251 (*regs)[16] = env->segs[R_SS].selector & 0xffff;
252}
j_mayer84409dd2007-04-06 08:56:50 +0000253#endif
bellardb346ff42003-06-15 20:05:50 +0000254
Mika Westerberg9edc5d72009-04-07 09:57:59 +0300255#define USE_ELF_CORE_DUMP
Richard Hendersond97ef722010-07-27 10:25:29 -0700256#define ELF_EXEC_PAGESIZE 4096
bellardb346ff42003-06-15 20:05:50 +0000257
258#endif
259
260#ifdef TARGET_ARM
261
Peter Maydell24e76ff2014-05-02 14:45:14 +0100262#ifndef TARGET_AARCH64
263/* 32 bit ARM definitions */
264
bellardb346ff42003-06-15 20:05:50 +0000265#define ELF_START_MMAP 0x80000000
266
Peter Crosthwaiteb597c3f2015-05-10 23:29:25 -0700267#define ELF_ARCH EM_ARM
Richard Hendersond97ef722010-07-27 10:25:29 -0700268#define ELF_CLASS ELFCLASS32
bellardb346ff42003-06-15 20:05:50 +0000269
Richard Hendersond97ef722010-07-27 10:25:29 -0700270static inline void init_thread(struct target_pt_regs *regs,
271 struct image_info *infop)
bellardb346ff42003-06-15 20:05:50 +0000272{
blueswir1992f48a2007-10-14 16:27:31 +0000273 abi_long stack = infop->start_stack;
bellardb346ff42003-06-15 20:05:50 +0000274 memset(regs, 0, sizeof(*regs));
Alexander Graf99033ca2013-09-03 20:12:21 +0100275
Peter Maydell167e4cd2016-03-03 12:11:18 +0000276 regs->uregs[16] = ARM_CPU_MODE_USR;
277 if (infop->entry & 1) {
278 regs->uregs[16] |= CPSR_T;
279 }
280 regs->uregs[15] = infop->entry & 0xfffffffe;
281 regs->uregs[13] = infop->start_stack;
bellard2f619692007-11-16 10:46:05 +0000282 /* FIXME - what to for failure of get_user()? */
Peter Maydell167e4cd2016-03-03 12:11:18 +0000283 get_user_ual(regs->uregs[2], stack + 8); /* envp */
284 get_user_ual(regs->uregs[1], stack + 4); /* envp */
bellarda1516e92003-07-09 17:13:37 +0000285 /* XXX: it seems that r0 is zeroed after ! */
Peter Maydell167e4cd2016-03-03 12:11:18 +0000286 regs->uregs[0] = 0;
pbrooke5fe0c52006-06-11 13:32:59 +0000287 /* For uClinux PIC binaries. */
j_mayer863cf0b2007-10-07 15:59:45 +0000288 /* XXX: Linux does this only on ARM with no MMU (do we care ?) */
Peter Maydell167e4cd2016-03-03 12:11:18 +0000289 regs->uregs[10] = infop->start_data;
bellardb346ff42003-06-15 20:05:50 +0000290}
291
Mika Westerbergedf8e2a2009-04-07 09:57:11 +0300292#define ELF_NREG 18
Anthony Liguoric227f092009-10-01 16:12:16 -0500293typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
Mika Westerbergedf8e2a2009-04-07 09:57:11 +0300294
Andreas Färber05390242012-02-25 03:37:53 +0100295static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUARMState *env)
Mika Westerbergedf8e2a2009-04-07 09:57:11 +0300296{
Paolo Bonzini86cd7b22013-04-17 16:26:38 +0200297 (*regs)[0] = tswapreg(env->regs[0]);
298 (*regs)[1] = tswapreg(env->regs[1]);
299 (*regs)[2] = tswapreg(env->regs[2]);
300 (*regs)[3] = tswapreg(env->regs[3]);
301 (*regs)[4] = tswapreg(env->regs[4]);
302 (*regs)[5] = tswapreg(env->regs[5]);
303 (*regs)[6] = tswapreg(env->regs[6]);
304 (*regs)[7] = tswapreg(env->regs[7]);
305 (*regs)[8] = tswapreg(env->regs[8]);
306 (*regs)[9] = tswapreg(env->regs[9]);
307 (*regs)[10] = tswapreg(env->regs[10]);
308 (*regs)[11] = tswapreg(env->regs[11]);
309 (*regs)[12] = tswapreg(env->regs[12]);
310 (*regs)[13] = tswapreg(env->regs[13]);
311 (*regs)[14] = tswapreg(env->regs[14]);
312 (*regs)[15] = tswapreg(env->regs[15]);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +0300313
Paolo Bonzini86cd7b22013-04-17 16:26:38 +0200314 (*regs)[16] = tswapreg(cpsr_read((CPUARMState *)env));
315 (*regs)[17] = tswapreg(env->regs[0]); /* XXX */
Mika Westerbergedf8e2a2009-04-07 09:57:11 +0300316}
317
bellard30ac07d2003-04-07 21:33:03 +0000318#define USE_ELF_CORE_DUMP
Richard Hendersond97ef722010-07-27 10:25:29 -0700319#define ELF_EXEC_PAGESIZE 4096
bellard30ac07d2003-04-07 21:33:03 +0000320
bellardafce2922005-10-30 20:58:30 +0000321enum
322{
Richard Hendersond97ef722010-07-27 10:25:29 -0700323 ARM_HWCAP_ARM_SWP = 1 << 0,
324 ARM_HWCAP_ARM_HALF = 1 << 1,
325 ARM_HWCAP_ARM_THUMB = 1 << 2,
326 ARM_HWCAP_ARM_26BIT = 1 << 3,
327 ARM_HWCAP_ARM_FAST_MULT = 1 << 4,
328 ARM_HWCAP_ARM_FPA = 1 << 5,
329 ARM_HWCAP_ARM_VFP = 1 << 6,
330 ARM_HWCAP_ARM_EDSP = 1 << 7,
331 ARM_HWCAP_ARM_JAVA = 1 << 8,
332 ARM_HWCAP_ARM_IWMMXT = 1 << 9,
Peter Maydell43ce3932014-05-02 14:45:12 +0100333 ARM_HWCAP_ARM_CRUNCH = 1 << 10,
334 ARM_HWCAP_ARM_THUMBEE = 1 << 11,
335 ARM_HWCAP_ARM_NEON = 1 << 12,
336 ARM_HWCAP_ARM_VFPv3 = 1 << 13,
337 ARM_HWCAP_ARM_VFPv3D16 = 1 << 14,
Peter Maydell24682652014-05-02 14:45:13 +0100338 ARM_HWCAP_ARM_TLS = 1 << 15,
339 ARM_HWCAP_ARM_VFPv4 = 1 << 16,
340 ARM_HWCAP_ARM_IDIVA = 1 << 17,
341 ARM_HWCAP_ARM_IDIVT = 1 << 18,
342 ARM_HWCAP_ARM_VFPD32 = 1 << 19,
343 ARM_HWCAP_ARM_LPAE = 1 << 20,
344 ARM_HWCAP_ARM_EVTSTRM = 1 << 21,
bellardafce2922005-10-30 20:58:30 +0000345};
346
Peter Maydellad6919d2014-05-02 14:45:15 +0100347enum {
348 ARM_HWCAP2_ARM_AES = 1 << 0,
349 ARM_HWCAP2_ARM_PMULL = 1 << 1,
350 ARM_HWCAP2_ARM_SHA1 = 1 << 2,
351 ARM_HWCAP2_ARM_SHA2 = 1 << 3,
352 ARM_HWCAP2_ARM_CRC32 = 1 << 4,
353};
354
Peter Maydell6b1275f2014-03-10 12:59:17 +0000355/* The commpage only exists for 32 bit kernels */
356
Meador Inge806d1022012-07-26 16:50:02 +0000357/* Return 1 if the proposed guest space is suitable for the guest.
358 * Return 0 if the proposed guest space isn't suitable, but another
359 * address space should be tried.
360 * Return -1 if there is no way the proposed guest space can be
361 * valid regardless of the base.
362 * The guest code may leave a page mapped and populate it if the
363 * address is suitable.
364 */
Luke Shumakerc3637ea2017-12-28 13:08:05 -0500365static int init_guest_commpage(unsigned long guest_base,
366 unsigned long guest_size)
Dr. David Alan Gilbert97cc7562011-08-31 17:24:34 +0100367{
368 unsigned long real_start, test_page_addr;
369
370 /* We need to check that we can force a fault on access to the
371 * commpage at 0xffff0fxx
372 */
373 test_page_addr = guest_base + (0xffff0f00 & qemu_host_page_mask);
Meador Inge806d1022012-07-26 16:50:02 +0000374
375 /* If the commpage lies within the already allocated guest space,
376 * then there is no way we can allocate it.
Luke Shumaker955e3042017-12-28 13:08:09 -0500377 *
378 * You may be thinking that that this check is redundant because
379 * we already validated the guest size against MAX_RESERVED_VA;
380 * but if qemu_host_page_mask is unusually large, then
381 * test_page_addr may be lower.
Meador Inge806d1022012-07-26 16:50:02 +0000382 */
383 if (test_page_addr >= guest_base
Peter Maydelle568f9d2017-10-03 17:21:43 +0100384 && test_page_addr < (guest_base + guest_size)) {
Meador Inge806d1022012-07-26 16:50:02 +0000385 return -1;
386 }
387
Dr. David Alan Gilbert97cc7562011-08-31 17:24:34 +0100388 /* Note it needs to be writeable to let us initialise it */
389 real_start = (unsigned long)
390 mmap((void *)test_page_addr, qemu_host_page_size,
391 PROT_READ | PROT_WRITE,
392 MAP_ANONYMOUS | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
393
394 /* If we can't map it then try another address */
395 if (real_start == -1ul) {
396 return 0;
397 }
398
399 if (real_start != test_page_addr) {
400 /* OS didn't put the page where we asked - unmap and reject */
401 munmap((void *)real_start, qemu_host_page_size);
402 return 0;
403 }
404
405 /* Leave the page mapped
406 * Populate it (mmap should have left it all 0'd)
407 */
408
409 /* Kernel helper versions */
410 __put_user(5, (uint32_t *)g2h(0xffff0ffcul));
411
412 /* Now it's populated make it RO */
413 if (mprotect((void *)test_page_addr, qemu_host_page_size, PROT_READ)) {
414 perror("Protecting guest commpage");
415 exit(-1);
416 }
417
418 return 1; /* All good */
419}
Benoit Canetadf050b2011-11-09 03:37:23 +0000420
421#define ELF_HWCAP get_elf_hwcap()
Peter Maydellad6919d2014-05-02 14:45:15 +0100422#define ELF_HWCAP2 get_elf_hwcap2()
Benoit Canetadf050b2011-11-09 03:37:23 +0000423
424static uint32_t get_elf_hwcap(void)
425{
Andreas Färbera2247f82013-06-09 19:47:04 +0200426 ARMCPU *cpu = ARM_CPU(thread_cpu);
Benoit Canetadf050b2011-11-09 03:37:23 +0000427 uint32_t hwcaps = 0;
428
429 hwcaps |= ARM_HWCAP_ARM_SWP;
430 hwcaps |= ARM_HWCAP_ARM_HALF;
431 hwcaps |= ARM_HWCAP_ARM_THUMB;
432 hwcaps |= ARM_HWCAP_ARM_FAST_MULT;
Benoit Canetadf050b2011-11-09 03:37:23 +0000433
434 /* probe for the extra features */
435#define GET_FEATURE(feat, hwcap) \
Andreas Färbera2247f82013-06-09 19:47:04 +0200436 do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
Peter Maydell24682652014-05-02 14:45:13 +0100437 /* EDSP is in v5TE and above, but all our v5 CPUs are v5TE */
438 GET_FEATURE(ARM_FEATURE_V5, ARM_HWCAP_ARM_EDSP);
Benoit Canetadf050b2011-11-09 03:37:23 +0000439 GET_FEATURE(ARM_FEATURE_VFP, ARM_HWCAP_ARM_VFP);
440 GET_FEATURE(ARM_FEATURE_IWMMXT, ARM_HWCAP_ARM_IWMMXT);
441 GET_FEATURE(ARM_FEATURE_THUMB2EE, ARM_HWCAP_ARM_THUMBEE);
442 GET_FEATURE(ARM_FEATURE_NEON, ARM_HWCAP_ARM_NEON);
443 GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPv3);
Peter Maydell24682652014-05-02 14:45:13 +0100444 GET_FEATURE(ARM_FEATURE_V6K, ARM_HWCAP_ARM_TLS);
445 GET_FEATURE(ARM_FEATURE_VFP4, ARM_HWCAP_ARM_VFPv4);
446 GET_FEATURE(ARM_FEATURE_ARM_DIV, ARM_HWCAP_ARM_IDIVA);
447 GET_FEATURE(ARM_FEATURE_THUMB_DIV, ARM_HWCAP_ARM_IDIVT);
448 /* All QEMU's VFPv3 CPUs have 32 registers, see VFP_DREG in translate.c.
449 * Note that the ARM_HWCAP_ARM_VFPv3D16 bit is always the inverse of
450 * ARM_HWCAP_ARM_VFPD32 (and so always clear for QEMU); it is unrelated
451 * to our VFP_FP16 feature bit.
452 */
453 GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPD32);
454 GET_FEATURE(ARM_FEATURE_LPAE, ARM_HWCAP_ARM_LPAE);
Benoit Canetadf050b2011-11-09 03:37:23 +0000455
456 return hwcaps;
457}
bellardafce2922005-10-30 20:58:30 +0000458
Peter Maydellad6919d2014-05-02 14:45:15 +0100459static uint32_t get_elf_hwcap2(void)
460{
461 ARMCPU *cpu = ARM_CPU(thread_cpu);
462 uint32_t hwcaps = 0;
463
464 GET_FEATURE(ARM_FEATURE_V8_AES, ARM_HWCAP2_ARM_AES);
Peter Maydell4e624ed2014-06-09 15:43:23 +0100465 GET_FEATURE(ARM_FEATURE_V8_PMULL, ARM_HWCAP2_ARM_PMULL);
Ard Biesheuvelf1ecb912014-06-09 15:43:23 +0100466 GET_FEATURE(ARM_FEATURE_V8_SHA1, ARM_HWCAP2_ARM_SHA1);
467 GET_FEATURE(ARM_FEATURE_V8_SHA256, ARM_HWCAP2_ARM_SHA2);
Peter Maydellad6919d2014-05-02 14:45:15 +0100468 GET_FEATURE(ARM_FEATURE_CRC, ARM_HWCAP2_ARM_CRC32);
469 return hwcaps;
470}
471
472#undef GET_FEATURE
473
Peter Maydell24e76ff2014-05-02 14:45:14 +0100474#else
475/* 64 bit ARM definitions */
476#define ELF_START_MMAP 0x80000000
477
Peter Crosthwaiteb597c3f2015-05-10 23:29:25 -0700478#define ELF_ARCH EM_AARCH64
Peter Maydell24e76ff2014-05-02 14:45:14 +0100479#define ELF_CLASS ELFCLASS64
480#define ELF_PLATFORM "aarch64"
481
482static inline void init_thread(struct target_pt_regs *regs,
483 struct image_info *infop)
484{
485 abi_long stack = infop->start_stack;
486 memset(regs, 0, sizeof(*regs));
487
488 regs->pc = infop->entry & ~0x3ULL;
489 regs->sp = stack;
490}
491
492#define ELF_NREG 34
493typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
494
495static void elf_core_copy_regs(target_elf_gregset_t *regs,
496 const CPUARMState *env)
497{
498 int i;
499
500 for (i = 0; i < 32; i++) {
501 (*regs)[i] = tswapreg(env->xregs[i]);
502 }
503 (*regs)[32] = tswapreg(env->pc);
504 (*regs)[33] = tswapreg(pstate_read((CPUARMState *)env));
505}
506
507#define USE_ELF_CORE_DUMP
508#define ELF_EXEC_PAGESIZE 4096
509
510enum {
511 ARM_HWCAP_A64_FP = 1 << 0,
512 ARM_HWCAP_A64_ASIMD = 1 << 1,
513 ARM_HWCAP_A64_EVTSTRM = 1 << 2,
514 ARM_HWCAP_A64_AES = 1 << 3,
515 ARM_HWCAP_A64_PMULL = 1 << 4,
516 ARM_HWCAP_A64_SHA1 = 1 << 5,
517 ARM_HWCAP_A64_SHA2 = 1 << 6,
518 ARM_HWCAP_A64_CRC32 = 1 << 7,
Ard Biesheuvel955f56d2018-02-09 10:40:29 +0000519 ARM_HWCAP_A64_ATOMICS = 1 << 8,
520 ARM_HWCAP_A64_FPHP = 1 << 9,
521 ARM_HWCAP_A64_ASIMDHP = 1 << 10,
522 ARM_HWCAP_A64_CPUID = 1 << 11,
523 ARM_HWCAP_A64_ASIMDRDM = 1 << 12,
524 ARM_HWCAP_A64_JSCVT = 1 << 13,
525 ARM_HWCAP_A64_FCMA = 1 << 14,
526 ARM_HWCAP_A64_LRCPC = 1 << 15,
527 ARM_HWCAP_A64_DCPOP = 1 << 16,
528 ARM_HWCAP_A64_SHA3 = 1 << 17,
529 ARM_HWCAP_A64_SM3 = 1 << 18,
530 ARM_HWCAP_A64_SM4 = 1 << 19,
531 ARM_HWCAP_A64_ASIMDDP = 1 << 20,
532 ARM_HWCAP_A64_SHA512 = 1 << 21,
533 ARM_HWCAP_A64_SVE = 1 << 22,
Peter Maydell24e76ff2014-05-02 14:45:14 +0100534};
535
536#define ELF_HWCAP get_elf_hwcap()
537
538static uint32_t get_elf_hwcap(void)
539{
540 ARMCPU *cpu = ARM_CPU(thread_cpu);
541 uint32_t hwcaps = 0;
542
543 hwcaps |= ARM_HWCAP_A64_FP;
544 hwcaps |= ARM_HWCAP_A64_ASIMD;
545
546 /* probe for the extra features */
547#define GET_FEATURE(feat, hwcap) \
548 do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
Peter Maydell5acc7652014-06-09 15:43:25 +0100549 GET_FEATURE(ARM_FEATURE_V8_AES, ARM_HWCAP_A64_AES);
Peter Maydell411bdc72014-06-09 15:43:24 +0100550 GET_FEATURE(ARM_FEATURE_V8_PMULL, ARM_HWCAP_A64_PMULL);
Peter Maydellf6fe04d2014-06-09 15:43:26 +0100551 GET_FEATURE(ARM_FEATURE_V8_SHA1, ARM_HWCAP_A64_SHA1);
552 GET_FEATURE(ARM_FEATURE_V8_SHA256, ARM_HWCAP_A64_SHA2);
Peter Maydell130f2e72014-06-09 15:43:25 +0100553 GET_FEATURE(ARM_FEATURE_CRC, ARM_HWCAP_A64_CRC32);
Ard Biesheuvel955f56d2018-02-09 10:40:29 +0000554 GET_FEATURE(ARM_FEATURE_V8_SHA3, ARM_HWCAP_A64_SHA3);
555 GET_FEATURE(ARM_FEATURE_V8_SM3, ARM_HWCAP_A64_SM3);
556 GET_FEATURE(ARM_FEATURE_V8_SM4, ARM_HWCAP_A64_SM4);
557 GET_FEATURE(ARM_FEATURE_V8_SHA512, ARM_HWCAP_A64_SHA512);
Peter Maydell201b19d2018-03-01 11:05:58 +0000558 GET_FEATURE(ARM_FEATURE_V8_FP16,
559 ARM_HWCAP_A64_FPHP | ARM_HWCAP_A64_ASIMDHP);
Richard Henderson1dc81c12018-03-02 10:45:41 +0000560 GET_FEATURE(ARM_FEATURE_V8_RDM, ARM_HWCAP_A64_ASIMDRDM);
Richard Henderson0438f032018-03-02 10:45:43 +0000561 GET_FEATURE(ARM_FEATURE_V8_FCMA, ARM_HWCAP_A64_FCMA);
Peter Maydell24e76ff2014-05-02 14:45:14 +0100562#undef GET_FEATURE
563
564 return hwcaps;
565}
566
567#endif /* not TARGET_AARCH64 */
568#endif /* TARGET_ARM */
bellard30ac07d2003-04-07 21:33:03 +0000569
bellard853d6f72003-09-30 20:58:32 +0000570#ifdef TARGET_SPARC
bellarda315a142005-01-30 22:59:18 +0000571#ifdef TARGET_SPARC64
bellard853d6f72003-09-30 20:58:32 +0000572
573#define ELF_START_MMAP 0x80000000
Artyom Tarasenkocf973e42011-07-14 19:37:06 +0200574#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
575 | HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9)
blueswir1992f48a2007-10-14 16:27:31 +0000576#ifndef TARGET_ABI32
blueswir1cb33da52007-10-09 16:34:29 +0000577#define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
blueswir1992f48a2007-10-14 16:27:31 +0000578#else
579#define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
580#endif
bellard853d6f72003-09-30 20:58:32 +0000581
bellarda315a142005-01-30 22:59:18 +0000582#define ELF_CLASS ELFCLASS64
bellard5ef54112006-07-18 21:14:09 +0000583#define ELF_ARCH EM_SPARCV9
584
Richard Hendersond97ef722010-07-27 10:25:29 -0700585#define STACK_BIAS 2047
bellarda315a142005-01-30 22:59:18 +0000586
Richard Hendersond97ef722010-07-27 10:25:29 -0700587static inline void init_thread(struct target_pt_regs *regs,
588 struct image_info *infop)
bellarda315a142005-01-30 22:59:18 +0000589{
blueswir1992f48a2007-10-14 16:27:31 +0000590#ifndef TARGET_ABI32
bellarda315a142005-01-30 22:59:18 +0000591 regs->tstate = 0;
blueswir1992f48a2007-10-14 16:27:31 +0000592#endif
bellarda315a142005-01-30 22:59:18 +0000593 regs->pc = infop->entry;
594 regs->npc = regs->pc + 4;
595 regs->y = 0;
blueswir1992f48a2007-10-14 16:27:31 +0000596#ifdef TARGET_ABI32
597 regs->u_regs[14] = infop->start_stack - 16 * 4;
598#else
blueswir1cb33da52007-10-09 16:34:29 +0000599 if (personality(infop->personality) == PER_LINUX32)
600 regs->u_regs[14] = infop->start_stack - 16 * 4;
601 else
602 regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS;
blueswir1992f48a2007-10-14 16:27:31 +0000603#endif
bellarda315a142005-01-30 22:59:18 +0000604}
605
606#else
607#define ELF_START_MMAP 0x80000000
Artyom Tarasenkocf973e42011-07-14 19:37:06 +0200608#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
609 | HWCAP_SPARC_MULDIV)
bellarda315a142005-01-30 22:59:18 +0000610
bellard853d6f72003-09-30 20:58:32 +0000611#define ELF_CLASS ELFCLASS32
bellard853d6f72003-09-30 20:58:32 +0000612#define ELF_ARCH EM_SPARC
613
Richard Hendersond97ef722010-07-27 10:25:29 -0700614static inline void init_thread(struct target_pt_regs *regs,
615 struct image_info *infop)
bellard853d6f72003-09-30 20:58:32 +0000616{
bellardf5155282004-01-04 15:46:50 +0000617 regs->psr = 0;
618 regs->pc = infop->entry;
619 regs->npc = regs->pc + 4;
620 regs->y = 0;
621 regs->u_regs[14] = infop->start_stack - 16 * 4;
bellard853d6f72003-09-30 20:58:32 +0000622}
623
624#endif
bellarda315a142005-01-30 22:59:18 +0000625#endif
bellard853d6f72003-09-30 20:58:32 +0000626
bellard67867302003-11-23 17:05:30 +0000627#ifdef TARGET_PPC
628
Peter Crosthwaite4ecd4d12015-05-10 23:29:10 -0700629#define ELF_MACHINE PPC_ELF_MACHINE
bellard67867302003-11-23 17:05:30 +0000630#define ELF_START_MMAP 0x80000000
631
j_mayere85e7c62007-10-18 19:59:49 +0000632#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
j_mayer84409dd2007-04-06 08:56:50 +0000633
634#define elf_check_arch(x) ( (x) == EM_PPC64 )
635
Richard Hendersond97ef722010-07-27 10:25:29 -0700636#define ELF_CLASS ELFCLASS64
j_mayer84409dd2007-04-06 08:56:50 +0000637
638#else
639
Richard Hendersond97ef722010-07-27 10:25:29 -0700640#define ELF_CLASS ELFCLASS32
j_mayer84409dd2007-04-06 08:56:50 +0000641
642#endif
643
Richard Hendersond97ef722010-07-27 10:25:29 -0700644#define ELF_ARCH EM_PPC
bellard67867302003-11-23 17:05:30 +0000645
Nathan Froyddf84e4f2009-05-12 12:26:59 -0700646/* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
647 See arch/powerpc/include/asm/cputable.h. */
648enum {
malc3efa9a62009-07-18 13:10:12 +0400649 QEMU_PPC_FEATURE_32 = 0x80000000,
650 QEMU_PPC_FEATURE_64 = 0x40000000,
651 QEMU_PPC_FEATURE_601_INSTR = 0x20000000,
652 QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000,
653 QEMU_PPC_FEATURE_HAS_FPU = 0x08000000,
654 QEMU_PPC_FEATURE_HAS_MMU = 0x04000000,
655 QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000,
656 QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000,
657 QEMU_PPC_FEATURE_HAS_SPE = 0x00800000,
658 QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000,
659 QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000,
660 QEMU_PPC_FEATURE_NO_TB = 0x00100000,
661 QEMU_PPC_FEATURE_POWER4 = 0x00080000,
662 QEMU_PPC_FEATURE_POWER5 = 0x00040000,
663 QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000,
664 QEMU_PPC_FEATURE_CELL = 0x00010000,
665 QEMU_PPC_FEATURE_BOOKE = 0x00008000,
666 QEMU_PPC_FEATURE_SMT = 0x00004000,
667 QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000,
668 QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000,
669 QEMU_PPC_FEATURE_PA6T = 0x00000800,
670 QEMU_PPC_FEATURE_HAS_DFP = 0x00000400,
671 QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200,
672 QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100,
673 QEMU_PPC_FEATURE_HAS_VSX = 0x00000080,
674 QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,
Nathan Froyddf84e4f2009-05-12 12:26:59 -0700675
malc3efa9a62009-07-18 13:10:12 +0400676 QEMU_PPC_FEATURE_TRUE_LE = 0x00000002,
677 QEMU_PPC_FEATURE_PPC_LE = 0x00000001,
Tom Mustaa60438d2014-06-16 11:03:22 -0500678
679 /* Feature definitions in AT_HWCAP2. */
680 QEMU_PPC_FEATURE2_ARCH_2_07 = 0x80000000, /* ISA 2.07 */
681 QEMU_PPC_FEATURE2_HAS_HTM = 0x40000000, /* Hardware Transactional Memory */
682 QEMU_PPC_FEATURE2_HAS_DSCR = 0x20000000, /* Data Stream Control Register */
683 QEMU_PPC_FEATURE2_HAS_EBB = 0x10000000, /* Event Base Branching */
684 QEMU_PPC_FEATURE2_HAS_ISEL = 0x08000000, /* Integer Select */
685 QEMU_PPC_FEATURE2_HAS_TAR = 0x04000000, /* Target Address Register */
Nathan Froyddf84e4f2009-05-12 12:26:59 -0700686};
687
688#define ELF_HWCAP get_elf_hwcap()
689
690static uint32_t get_elf_hwcap(void)
691{
Andreas Färbera2247f82013-06-09 19:47:04 +0200692 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
Nathan Froyddf84e4f2009-05-12 12:26:59 -0700693 uint32_t features = 0;
694
695 /* We don't have to be terribly complete here; the high points are
696 Altivec/FP/SPE support. Anything else is just a bonus. */
Richard Hendersond97ef722010-07-27 10:25:29 -0700697#define GET_FEATURE(flag, feature) \
Andreas Färbera2247f82013-06-09 19:47:04 +0200698 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
Michael Walle58eb5302016-09-21 11:57:05 +0200699#define GET_FEATURE2(flags, feature) \
700 do { \
701 if ((cpu->env.insns_flags2 & flags) == flags) { \
702 features |= feature; \
703 } \
704 } while (0)
malc3efa9a62009-07-18 13:10:12 +0400705 GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64);
706 GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU);
707 GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC);
708 GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE);
709 GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE);
710 GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE);
711 GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE);
712 GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC);
Tom Musta0e019742014-06-16 11:03:21 -0500713 GET_FEATURE2(PPC2_DFP, QEMU_PPC_FEATURE_HAS_DFP);
714 GET_FEATURE2(PPC2_VSX, QEMU_PPC_FEATURE_HAS_VSX);
715 GET_FEATURE2((PPC2_PERM_ISA206 | PPC2_DIVE_ISA206 | PPC2_ATOMIC_ISA206 |
716 PPC2_FP_CVT_ISA206 | PPC2_FP_TST_ISA206),
717 QEMU_PPC_FEATURE_ARCH_2_06);
Nathan Froyddf84e4f2009-05-12 12:26:59 -0700718#undef GET_FEATURE
Tom Musta0e019742014-06-16 11:03:21 -0500719#undef GET_FEATURE2
Nathan Froyddf84e4f2009-05-12 12:26:59 -0700720
721 return features;
722}
723
Tom Mustaa60438d2014-06-16 11:03:22 -0500724#define ELF_HWCAP2 get_elf_hwcap2()
725
726static uint32_t get_elf_hwcap2(void)
727{
728 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
729 uint32_t features = 0;
730
731#define GET_FEATURE(flag, feature) \
732 do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
733#define GET_FEATURE2(flag, feature) \
734 do { if (cpu->env.insns_flags2 & flag) { features |= feature; } } while (0)
735
736 GET_FEATURE(PPC_ISEL, QEMU_PPC_FEATURE2_HAS_ISEL);
737 GET_FEATURE2(PPC2_BCTAR_ISA207, QEMU_PPC_FEATURE2_HAS_TAR);
738 GET_FEATURE2((PPC2_BCTAR_ISA207 | PPC2_LSQ_ISA207 | PPC2_ALTIVEC_207 |
739 PPC2_ISA207S), QEMU_PPC_FEATURE2_ARCH_2_07);
740
741#undef GET_FEATURE
742#undef GET_FEATURE2
743
744 return features;
745}
746
bellardf5155282004-01-04 15:46:50 +0000747/*
bellardf5155282004-01-04 15:46:50 +0000748 * The requirements here are:
749 * - keep the final alignment of sp (sp & 0xf)
750 * - make sure the 32-bit value at the first 16 byte aligned position of
751 * AUXV is greater than 16 for glibc compatibility.
752 * AT_IGNOREPPC is used for that.
753 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
754 * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
755 */
bellard0bccf032005-08-21 10:12:28 +0000756#define DLINFO_ARCH_ITEMS 5
Richard Hendersond97ef722010-07-27 10:25:29 -0700757#define ARCH_DLINFO \
758 do { \
Tom Musta623e2502014-06-16 11:03:19 -0500759 PowerPCCPU *cpu = POWERPC_CPU(thread_cpu); \
Richard Hendersond97ef722010-07-27 10:25:29 -0700760 /* \
Peter Maydell82991be2017-06-27 17:49:58 +0100761 * Handle glibc compatibility: these magic entries must \
762 * be at the lowest addresses in the final auxv. \
Richard Hendersond97ef722010-07-27 10:25:29 -0700763 */ \
764 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
765 NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
Peter Maydell82991be2017-06-27 17:49:58 +0100766 NEW_AUX_ENT(AT_DCACHEBSIZE, cpu->env.dcache_line_size); \
767 NEW_AUX_ENT(AT_ICACHEBSIZE, cpu->env.icache_line_size); \
768 NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
Richard Hendersond97ef722010-07-27 10:25:29 -0700769 } while (0)
bellardf5155282004-01-04 15:46:50 +0000770
bellard67867302003-11-23 17:05:30 +0000771static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
772{
bellard67867302003-11-23 17:05:30 +0000773 _regs->gpr[1] = infop->start_stack;
j_mayere85e7c62007-10-18 19:59:49 +0000774#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
Doug Kwand90b94c2014-05-29 09:12:19 -0500775 if (get_ppc64_abi(infop) < 2) {
Peter Maydell2ccf97e2015-01-20 15:19:33 +0000776 uint64_t val;
777 get_user_u64(val, infop->entry + 8);
778 _regs->gpr[2] = val + infop->load_bias;
779 get_user_u64(val, infop->entry);
780 infop->entry = val + infop->load_bias;
Doug Kwand90b94c2014-05-29 09:12:19 -0500781 } else {
782 _regs->gpr[12] = infop->entry; /* r12 set to global entry address */
783 }
j_mayer84409dd2007-04-06 08:56:50 +0000784#endif
bellard67867302003-11-23 17:05:30 +0000785 _regs->nip = infop->entry;
786}
787
Nathan Froyde2f3e742009-12-11 09:04:48 -0800788/* See linux kernel: arch/powerpc/include/asm/elf.h. */
789#define ELF_NREG 48
790typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
791
Andreas Färber05390242012-02-25 03:37:53 +0100792static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *env)
Nathan Froyde2f3e742009-12-11 09:04:48 -0800793{
794 int i;
795 target_ulong ccr = 0;
796
797 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
Paolo Bonzini86cd7b22013-04-17 16:26:38 +0200798 (*regs)[i] = tswapreg(env->gpr[i]);
Nathan Froyde2f3e742009-12-11 09:04:48 -0800799 }
800
Paolo Bonzini86cd7b22013-04-17 16:26:38 +0200801 (*regs)[32] = tswapreg(env->nip);
802 (*regs)[33] = tswapreg(env->msr);
803 (*regs)[35] = tswapreg(env->ctr);
804 (*regs)[36] = tswapreg(env->lr);
805 (*regs)[37] = tswapreg(env->xer);
Nathan Froyde2f3e742009-12-11 09:04:48 -0800806
807 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
808 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
809 }
Paolo Bonzini86cd7b22013-04-17 16:26:38 +0200810 (*regs)[38] = tswapreg(ccr);
Nathan Froyde2f3e742009-12-11 09:04:48 -0800811}
812
813#define USE_ELF_CORE_DUMP
Richard Hendersond97ef722010-07-27 10:25:29 -0700814#define ELF_EXEC_PAGESIZE 4096
bellard67867302003-11-23 17:05:30 +0000815
816#endif
817
bellard048f6b42005-11-26 18:47:20 +0000818#ifdef TARGET_MIPS
819
820#define ELF_START_MMAP 0x80000000
821
ths388bb212007-05-13 13:58:00 +0000822#ifdef TARGET_MIPS64
823#define ELF_CLASS ELFCLASS64
824#else
bellard048f6b42005-11-26 18:47:20 +0000825#define ELF_CLASS ELFCLASS32
ths388bb212007-05-13 13:58:00 +0000826#endif
bellard048f6b42005-11-26 18:47:20 +0000827#define ELF_ARCH EM_MIPS
828
Richard Hendersond97ef722010-07-27 10:25:29 -0700829static inline void init_thread(struct target_pt_regs *regs,
830 struct image_info *infop)
bellard048f6b42005-11-26 18:47:20 +0000831{
ths623a9302007-10-28 19:45:05 +0000832 regs->cp0_status = 2 << CP0St_KSU;
bellard048f6b42005-11-26 18:47:20 +0000833 regs->cp0_epc = infop->entry;
834 regs->regs[29] = infop->start_stack;
835}
836
Nathan Froyd51e52602009-12-11 09:04:49 -0800837/* See linux kernel: arch/mips/include/asm/elf.h. */
838#define ELF_NREG 45
839typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
840
841/* See linux kernel: arch/mips/include/asm/reg.h. */
842enum {
843#ifdef TARGET_MIPS64
844 TARGET_EF_R0 = 0,
845#else
846 TARGET_EF_R0 = 6,
847#endif
848 TARGET_EF_R26 = TARGET_EF_R0 + 26,
849 TARGET_EF_R27 = TARGET_EF_R0 + 27,
850 TARGET_EF_LO = TARGET_EF_R0 + 32,
851 TARGET_EF_HI = TARGET_EF_R0 + 33,
852 TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34,
853 TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35,
854 TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36,
855 TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37
856};
857
858/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
Andreas Färber05390242012-02-25 03:37:53 +0100859static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMIPSState *env)
Nathan Froyd51e52602009-12-11 09:04:49 -0800860{
861 int i;
862
863 for (i = 0; i < TARGET_EF_R0; i++) {
864 (*regs)[i] = 0;
865 }
866 (*regs)[TARGET_EF_R0] = 0;
867
868 for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) {
Paolo Bonzinia29f9982013-04-17 16:26:37 +0200869 (*regs)[TARGET_EF_R0 + i] = tswapreg(env->active_tc.gpr[i]);
Nathan Froyd51e52602009-12-11 09:04:49 -0800870 }
871
872 (*regs)[TARGET_EF_R26] = 0;
873 (*regs)[TARGET_EF_R27] = 0;
Paolo Bonzinia29f9982013-04-17 16:26:37 +0200874 (*regs)[TARGET_EF_LO] = tswapreg(env->active_tc.LO[0]);
875 (*regs)[TARGET_EF_HI] = tswapreg(env->active_tc.HI[0]);
876 (*regs)[TARGET_EF_CP0_EPC] = tswapreg(env->active_tc.PC);
877 (*regs)[TARGET_EF_CP0_BADVADDR] = tswapreg(env->CP0_BadVAddr);
878 (*regs)[TARGET_EF_CP0_STATUS] = tswapreg(env->CP0_Status);
879 (*regs)[TARGET_EF_CP0_CAUSE] = tswapreg(env->CP0_Cause);
Nathan Froyd51e52602009-12-11 09:04:49 -0800880}
881
882#define USE_ELF_CORE_DUMP
ths388bb212007-05-13 13:58:00 +0000883#define ELF_EXEC_PAGESIZE 4096
884
James Cowgill46a1ee42018-03-15 15:13:48 +0000885/* See arch/mips/include/uapi/asm/hwcap.h. */
886enum {
887 HWCAP_MIPS_R6 = (1 << 0),
888 HWCAP_MIPS_MSA = (1 << 1),
889};
890
891#define ELF_HWCAP get_elf_hwcap()
892
893static uint32_t get_elf_hwcap(void)
894{
895 MIPSCPU *cpu = MIPS_CPU(thread_cpu);
896 uint32_t hwcaps = 0;
897
898#define GET_FEATURE(flag, hwcap) \
899 do { if (cpu->env.insn_flags & (flag)) { hwcaps |= hwcap; } } while (0)
900
901 GET_FEATURE(ISA_MIPS32R6 | ISA_MIPS64R6, HWCAP_MIPS_R6);
902 GET_FEATURE(ASE_MSA, HWCAP_MIPS_MSA);
903
904#undef GET_FEATURE
905
906 return hwcaps;
907}
908
bellard048f6b42005-11-26 18:47:20 +0000909#endif /* TARGET_MIPS */
910
Edgar E. Iglesiasb779e292009-05-20 21:31:33 +0200911#ifdef TARGET_MICROBLAZE
912
913#define ELF_START_MMAP 0x80000000
914
Edgar E. Iglesias0d5d4692010-05-19 15:24:17 +0200915#define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD)
Edgar E. Iglesiasb779e292009-05-20 21:31:33 +0200916
917#define ELF_CLASS ELFCLASS32
Edgar E. Iglesias0d5d4692010-05-19 15:24:17 +0200918#define ELF_ARCH EM_MICROBLAZE
Edgar E. Iglesiasb779e292009-05-20 21:31:33 +0200919
Richard Hendersond97ef722010-07-27 10:25:29 -0700920static inline void init_thread(struct target_pt_regs *regs,
921 struct image_info *infop)
Edgar E. Iglesiasb779e292009-05-20 21:31:33 +0200922{
923 regs->pc = infop->entry;
924 regs->r1 = infop->start_stack;
925
926}
927
Edgar E. Iglesiasb779e292009-05-20 21:31:33 +0200928#define ELF_EXEC_PAGESIZE 4096
929
Edgar E. Iglesiase4cbd442010-05-19 15:09:28 +0200930#define USE_ELF_CORE_DUMP
931#define ELF_NREG 38
932typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
933
934/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
Andreas Färber05390242012-02-25 03:37:53 +0100935static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMBState *env)
Edgar E. Iglesiase4cbd442010-05-19 15:09:28 +0200936{
937 int i, pos = 0;
938
939 for (i = 0; i < 32; i++) {
Paolo Bonzini86cd7b22013-04-17 16:26:38 +0200940 (*regs)[pos++] = tswapreg(env->regs[i]);
Edgar E. Iglesiase4cbd442010-05-19 15:09:28 +0200941 }
942
943 for (i = 0; i < 6; i++) {
Paolo Bonzini86cd7b22013-04-17 16:26:38 +0200944 (*regs)[pos++] = tswapreg(env->sregs[i]);
Edgar E. Iglesiase4cbd442010-05-19 15:09:28 +0200945 }
946}
947
Edgar E. Iglesiasb779e292009-05-20 21:31:33 +0200948#endif /* TARGET_MICROBLAZE */
949
Marek Vasuta0a839b2017-01-18 23:01:42 +0100950#ifdef TARGET_NIOS2
951
952#define ELF_START_MMAP 0x80000000
953
954#define elf_check_arch(x) ((x) == EM_ALTERA_NIOS2)
955
956#define ELF_CLASS ELFCLASS32
957#define ELF_ARCH EM_ALTERA_NIOS2
958
959static void init_thread(struct target_pt_regs *regs, struct image_info *infop)
960{
961 regs->ea = infop->entry;
962 regs->sp = infop->start_stack;
963 regs->estatus = 0x3;
964}
965
966#define ELF_EXEC_PAGESIZE 4096
967
968#define USE_ELF_CORE_DUMP
969#define ELF_NREG 49
970typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
971
972/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
973static void elf_core_copy_regs(target_elf_gregset_t *regs,
974 const CPUNios2State *env)
975{
976 int i;
977
978 (*regs)[0] = -1;
979 for (i = 1; i < 8; i++) /* r0-r7 */
980 (*regs)[i] = tswapreg(env->regs[i + 7]);
981
982 for (i = 8; i < 16; i++) /* r8-r15 */
983 (*regs)[i] = tswapreg(env->regs[i - 8]);
984
985 for (i = 16; i < 24; i++) /* r16-r23 */
986 (*regs)[i] = tswapreg(env->regs[i + 7]);
987 (*regs)[24] = -1; /* R_ET */
988 (*regs)[25] = -1; /* R_BT */
989 (*regs)[26] = tswapreg(env->regs[R_GP]);
990 (*regs)[27] = tswapreg(env->regs[R_SP]);
991 (*regs)[28] = tswapreg(env->regs[R_FP]);
992 (*regs)[29] = tswapreg(env->regs[R_EA]);
993 (*regs)[30] = -1; /* R_SSTATUS */
994 (*regs)[31] = tswapreg(env->regs[R_RA]);
995
996 (*regs)[32] = tswapreg(env->regs[R_PC]);
997
998 (*regs)[33] = -1; /* R_STATUS */
999 (*regs)[34] = tswapreg(env->regs[CR_ESTATUS]);
1000
1001 for (i = 35; i < 49; i++) /* ... */
1002 (*regs)[i] = -1;
1003}
1004
1005#endif /* TARGET_NIOS2 */
1006
Jia Liud9627832012-07-20 15:50:52 +08001007#ifdef TARGET_OPENRISC
1008
1009#define ELF_START_MMAP 0x08000000
1010
Jia Liud9627832012-07-20 15:50:52 +08001011#define ELF_ARCH EM_OPENRISC
1012#define ELF_CLASS ELFCLASS32
1013#define ELF_DATA ELFDATA2MSB
1014
1015static inline void init_thread(struct target_pt_regs *regs,
1016 struct image_info *infop)
1017{
1018 regs->pc = infop->entry;
1019 regs->gpr[1] = infop->start_stack;
1020}
1021
1022#define USE_ELF_CORE_DUMP
1023#define ELF_EXEC_PAGESIZE 8192
1024
1025/* See linux kernel arch/openrisc/include/asm/elf.h. */
1026#define ELF_NREG 34 /* gprs and pc, sr */
1027typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1028
1029static void elf_core_copy_regs(target_elf_gregset_t *regs,
1030 const CPUOpenRISCState *env)
1031{
1032 int i;
1033
1034 for (i = 0; i < 32; i++) {
Stafford Horned89e71e2017-04-06 06:44:56 +09001035 (*regs)[i] = tswapreg(cpu_get_gpr(env, i));
Jia Liud9627832012-07-20 15:50:52 +08001036 }
Paolo Bonzini86cd7b22013-04-17 16:26:38 +02001037 (*regs)[32] = tswapreg(env->pc);
Richard Henderson84775c42015-02-18 11:45:54 -08001038 (*regs)[33] = tswapreg(cpu_get_sr(env));
Jia Liud9627832012-07-20 15:50:52 +08001039}
1040#define ELF_HWCAP 0
1041#define ELF_PLATFORM NULL
1042
1043#endif /* TARGET_OPENRISC */
1044
bellardfdf9b3e2006-04-27 21:07:38 +00001045#ifdef TARGET_SH4
1046
1047#define ELF_START_MMAP 0x80000000
1048
bellardfdf9b3e2006-04-27 21:07:38 +00001049#define ELF_CLASS ELFCLASS32
bellardfdf9b3e2006-04-27 21:07:38 +00001050#define ELF_ARCH EM_SH
1051
Richard Hendersond97ef722010-07-27 10:25:29 -07001052static inline void init_thread(struct target_pt_regs *regs,
1053 struct image_info *infop)
bellardfdf9b3e2006-04-27 21:07:38 +00001054{
Richard Hendersond97ef722010-07-27 10:25:29 -07001055 /* Check other registers XXXXX */
1056 regs->pc = infop->entry;
1057 regs->regs[15] = infop->start_stack;
bellardfdf9b3e2006-04-27 21:07:38 +00001058}
1059
Nathan Froyd7631c972009-12-11 09:04:51 -08001060/* See linux kernel: arch/sh/include/asm/elf.h. */
1061#define ELF_NREG 23
1062typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1063
1064/* See linux kernel: arch/sh/include/asm/ptrace.h. */
1065enum {
1066 TARGET_REG_PC = 16,
1067 TARGET_REG_PR = 17,
1068 TARGET_REG_SR = 18,
1069 TARGET_REG_GBR = 19,
1070 TARGET_REG_MACH = 20,
1071 TARGET_REG_MACL = 21,
1072 TARGET_REG_SYSCALL = 22
1073};
1074
Richard Hendersond97ef722010-07-27 10:25:29 -07001075static inline void elf_core_copy_regs(target_elf_gregset_t *regs,
Andreas Färber05390242012-02-25 03:37:53 +01001076 const CPUSH4State *env)
Nathan Froyd7631c972009-12-11 09:04:51 -08001077{
1078 int i;
1079
1080 for (i = 0; i < 16; i++) {
Philippe Mathieu-Daudé72cd5002017-07-26 23:42:16 -03001081 (*regs)[i] = tswapreg(env->gregs[i]);
Nathan Froyd7631c972009-12-11 09:04:51 -08001082 }
1083
Paolo Bonzini86cd7b22013-04-17 16:26:38 +02001084 (*regs)[TARGET_REG_PC] = tswapreg(env->pc);
1085 (*regs)[TARGET_REG_PR] = tswapreg(env->pr);
1086 (*regs)[TARGET_REG_SR] = tswapreg(env->sr);
1087 (*regs)[TARGET_REG_GBR] = tswapreg(env->gbr);
1088 (*regs)[TARGET_REG_MACH] = tswapreg(env->mach);
1089 (*regs)[TARGET_REG_MACL] = tswapreg(env->macl);
Nathan Froyd7631c972009-12-11 09:04:51 -08001090 (*regs)[TARGET_REG_SYSCALL] = 0; /* FIXME */
1091}
1092
1093#define USE_ELF_CORE_DUMP
bellardfdf9b3e2006-04-27 21:07:38 +00001094#define ELF_EXEC_PAGESIZE 4096
1095
Richard Hendersone42fd942015-05-23 15:06:54 -07001096enum {
1097 SH_CPU_HAS_FPU = 0x0001, /* Hardware FPU support */
1098 SH_CPU_HAS_P2_FLUSH_BUG = 0x0002, /* Need to flush the cache in P2 area */
1099 SH_CPU_HAS_MMU_PAGE_ASSOC = 0x0004, /* SH3: TLB way selection bit support */
1100 SH_CPU_HAS_DSP = 0x0008, /* SH-DSP: DSP support */
1101 SH_CPU_HAS_PERF_COUNTER = 0x0010, /* Hardware performance counters */
1102 SH_CPU_HAS_PTEA = 0x0020, /* PTEA register */
1103 SH_CPU_HAS_LLSC = 0x0040, /* movli.l/movco.l */
1104 SH_CPU_HAS_L2_CACHE = 0x0080, /* Secondary cache / URAM */
1105 SH_CPU_HAS_OP32 = 0x0100, /* 32-bit instruction support */
1106 SH_CPU_HAS_PTEAEX = 0x0200, /* PTE ASID Extension support */
1107};
1108
1109#define ELF_HWCAP get_elf_hwcap()
1110
1111static uint32_t get_elf_hwcap(void)
1112{
1113 SuperHCPU *cpu = SUPERH_CPU(thread_cpu);
1114 uint32_t hwcap = 0;
1115
1116 hwcap |= SH_CPU_HAS_FPU;
1117
1118 if (cpu->env.features & SH_FEATURE_SH4A) {
1119 hwcap |= SH_CPU_HAS_LLSC;
1120 }
1121
1122 return hwcap;
1123}
1124
bellardfdf9b3e2006-04-27 21:07:38 +00001125#endif
1126
ths48733d12007-10-08 13:36:46 +00001127#ifdef TARGET_CRIS
1128
1129#define ELF_START_MMAP 0x80000000
1130
ths48733d12007-10-08 13:36:46 +00001131#define ELF_CLASS ELFCLASS32
ths48733d12007-10-08 13:36:46 +00001132#define ELF_ARCH EM_CRIS
1133
Richard Hendersond97ef722010-07-27 10:25:29 -07001134static inline void init_thread(struct target_pt_regs *regs,
1135 struct image_info *infop)
ths48733d12007-10-08 13:36:46 +00001136{
Richard Hendersond97ef722010-07-27 10:25:29 -07001137 regs->erp = infop->entry;
ths48733d12007-10-08 13:36:46 +00001138}
1139
ths48733d12007-10-08 13:36:46 +00001140#define ELF_EXEC_PAGESIZE 8192
1141
1142#endif
1143
pbrooke6e59062006-10-22 00:18:54 +00001144#ifdef TARGET_M68K
1145
1146#define ELF_START_MMAP 0x80000000
1147
Richard Hendersond97ef722010-07-27 10:25:29 -07001148#define ELF_CLASS ELFCLASS32
Richard Hendersond97ef722010-07-27 10:25:29 -07001149#define ELF_ARCH EM_68K
pbrooke6e59062006-10-22 00:18:54 +00001150
1151/* ??? Does this need to do anything?
Richard Hendersond97ef722010-07-27 10:25:29 -07001152 #define ELF_PLAT_INIT(_r) */
pbrooke6e59062006-10-22 00:18:54 +00001153
Richard Hendersond97ef722010-07-27 10:25:29 -07001154static inline void init_thread(struct target_pt_regs *regs,
1155 struct image_info *infop)
pbrooke6e59062006-10-22 00:18:54 +00001156{
1157 regs->usp = infop->start_stack;
1158 regs->sr = 0;
1159 regs->pc = infop->entry;
1160}
1161
Nathan Froyd7a93cc52009-12-11 09:04:50 -08001162/* See linux kernel: arch/m68k/include/asm/elf.h. */
1163#define ELF_NREG 20
1164typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1165
Andreas Färber05390242012-02-25 03:37:53 +01001166static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUM68KState *env)
Nathan Froyd7a93cc52009-12-11 09:04:50 -08001167{
Paolo Bonzini86cd7b22013-04-17 16:26:38 +02001168 (*regs)[0] = tswapreg(env->dregs[1]);
1169 (*regs)[1] = tswapreg(env->dregs[2]);
1170 (*regs)[2] = tswapreg(env->dregs[3]);
1171 (*regs)[3] = tswapreg(env->dregs[4]);
1172 (*regs)[4] = tswapreg(env->dregs[5]);
1173 (*regs)[5] = tswapreg(env->dregs[6]);
1174 (*regs)[6] = tswapreg(env->dregs[7]);
1175 (*regs)[7] = tswapreg(env->aregs[0]);
1176 (*regs)[8] = tswapreg(env->aregs[1]);
1177 (*regs)[9] = tswapreg(env->aregs[2]);
1178 (*regs)[10] = tswapreg(env->aregs[3]);
1179 (*regs)[11] = tswapreg(env->aregs[4]);
1180 (*regs)[12] = tswapreg(env->aregs[5]);
1181 (*regs)[13] = tswapreg(env->aregs[6]);
1182 (*regs)[14] = tswapreg(env->dregs[0]);
1183 (*regs)[15] = tswapreg(env->aregs[7]);
1184 (*regs)[16] = tswapreg(env->dregs[0]); /* FIXME: orig_d0 */
1185 (*regs)[17] = tswapreg(env->sr);
1186 (*regs)[18] = tswapreg(env->pc);
Nathan Froyd7a93cc52009-12-11 09:04:50 -08001187 (*regs)[19] = 0; /* FIXME: regs->format | regs->vector */
1188}
1189
1190#define USE_ELF_CORE_DUMP
Richard Hendersond97ef722010-07-27 10:25:29 -07001191#define ELF_EXEC_PAGESIZE 8192
pbrooke6e59062006-10-22 00:18:54 +00001192
1193#endif
1194
j_mayer7a3148a2007-04-05 07:13:51 +00001195#ifdef TARGET_ALPHA
1196
1197#define ELF_START_MMAP (0x30000000000ULL)
1198
j_mayer7a3148a2007-04-05 07:13:51 +00001199#define ELF_CLASS ELFCLASS64
j_mayer7a3148a2007-04-05 07:13:51 +00001200#define ELF_ARCH EM_ALPHA
1201
Richard Hendersond97ef722010-07-27 10:25:29 -07001202static inline void init_thread(struct target_pt_regs *regs,
1203 struct image_info *infop)
j_mayer7a3148a2007-04-05 07:13:51 +00001204{
1205 regs->pc = infop->entry;
1206 regs->ps = 8;
1207 regs->usp = infop->start_stack;
j_mayer7a3148a2007-04-05 07:13:51 +00001208}
1209
j_mayer7a3148a2007-04-05 07:13:51 +00001210#define ELF_EXEC_PAGESIZE 8192
1211
1212#endif /* TARGET_ALPHA */
1213
Ulrich Hechta4c075f2009-07-24 16:57:31 +02001214#ifdef TARGET_S390X
1215
1216#define ELF_START_MMAP (0x20000000000ULL)
1217
Ulrich Hechta4c075f2009-07-24 16:57:31 +02001218#define ELF_CLASS ELFCLASS64
1219#define ELF_DATA ELFDATA2MSB
1220#define ELF_ARCH EM_S390
1221
1222static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
1223{
1224 regs->psw.addr = infop->entry;
1225 regs->psw.mask = PSW_MASK_64 | PSW_MASK_32;
1226 regs->gprs[15] = infop->start_stack;
1227}
1228
1229#endif /* TARGET_S390X */
1230
Chen Gangb16189b2015-08-21 05:36:37 +08001231#ifdef TARGET_TILEGX
1232
1233/* 42 bits real used address, a half for user mode */
1234#define ELF_START_MMAP (0x00000020000000000ULL)
1235
1236#define elf_check_arch(x) ((x) == EM_TILEGX)
1237
1238#define ELF_CLASS ELFCLASS64
1239#define ELF_DATA ELFDATA2LSB
1240#define ELF_ARCH EM_TILEGX
1241
1242static inline void init_thread(struct target_pt_regs *regs,
1243 struct image_info *infop)
1244{
1245 regs->pc = infop->entry;
1246 regs->sp = infop->start_stack;
1247
1248}
1249
1250#define ELF_EXEC_PAGESIZE 65536 /* TILE-Gx page size is 64KB */
1251
1252#endif /* TARGET_TILEGX */
1253
Michael Clark47ae93c2018-03-03 01:31:11 +13001254#ifdef TARGET_RISCV
1255
1256#define ELF_START_MMAP 0x80000000
1257#define ELF_ARCH EM_RISCV
1258
1259#ifdef TARGET_RISCV32
1260#define ELF_CLASS ELFCLASS32
1261#else
1262#define ELF_CLASS ELFCLASS64
1263#endif
1264
1265static inline void init_thread(struct target_pt_regs *regs,
1266 struct image_info *infop)
1267{
1268 regs->sepc = infop->entry;
1269 regs->sp = infop->start_stack;
1270}
1271
1272#define ELF_EXEC_PAGESIZE 4096
1273
1274#endif /* TARGET_RISCV */
1275
Richard Henderson7c248bc2016-12-15 10:01:00 -08001276#ifdef TARGET_HPPA
1277
1278#define ELF_START_MMAP 0x80000000
1279#define ELF_CLASS ELFCLASS32
1280#define ELF_ARCH EM_PARISC
1281#define ELF_PLATFORM "PARISC"
1282#define STACK_GROWS_DOWN 0
1283#define STACK_ALIGNMENT 64
1284
1285static inline void init_thread(struct target_pt_regs *regs,
1286 struct image_info *infop)
1287{
1288 regs->iaoq[0] = infop->entry;
1289 regs->iaoq[1] = infop->entry + 4;
1290 regs->gr[23] = 0;
1291 regs->gr[24] = infop->arg_start;
1292 regs->gr[25] = (infop->arg_end - infop->arg_start) / sizeof(abi_ulong);
1293 /* The top-of-stack contains a linkage buffer. */
1294 regs->gr[30] = infop->start_stack + 64;
1295 regs->gr[31] = infop->entry;
1296}
1297
1298#endif /* TARGET_HPPA */
1299
Max Filippovba7651f2017-01-25 10:54:11 -08001300#ifdef TARGET_XTENSA
1301
1302#define ELF_START_MMAP 0x20000000
1303
1304#define ELF_CLASS ELFCLASS32
1305#define ELF_ARCH EM_XTENSA
1306
1307static inline void init_thread(struct target_pt_regs *regs,
1308 struct image_info *infop)
1309{
1310 regs->windowbase = 0;
1311 regs->windowstart = 1;
1312 regs->areg[1] = infop->start_stack;
1313 regs->pc = infop->entry;
1314}
1315
1316/* See linux kernel: arch/xtensa/include/asm/elf.h. */
1317#define ELF_NREG 128
1318typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
1319
1320enum {
1321 TARGET_REG_PC,
1322 TARGET_REG_PS,
1323 TARGET_REG_LBEG,
1324 TARGET_REG_LEND,
1325 TARGET_REG_LCOUNT,
1326 TARGET_REG_SAR,
1327 TARGET_REG_WINDOWSTART,
1328 TARGET_REG_WINDOWBASE,
1329 TARGET_REG_THREADPTR,
1330 TARGET_REG_AR0 = 64,
1331};
1332
1333static void elf_core_copy_regs(target_elf_gregset_t *regs,
1334 const CPUXtensaState *env)
1335{
1336 unsigned i;
1337
1338 (*regs)[TARGET_REG_PC] = tswapreg(env->pc);
1339 (*regs)[TARGET_REG_PS] = tswapreg(env->sregs[PS] & ~PS_EXCM);
1340 (*regs)[TARGET_REG_LBEG] = tswapreg(env->sregs[LBEG]);
1341 (*regs)[TARGET_REG_LEND] = tswapreg(env->sregs[LEND]);
1342 (*regs)[TARGET_REG_LCOUNT] = tswapreg(env->sregs[LCOUNT]);
1343 (*regs)[TARGET_REG_SAR] = tswapreg(env->sregs[SAR]);
1344 (*regs)[TARGET_REG_WINDOWSTART] = tswapreg(env->sregs[WINDOW_START]);
1345 (*regs)[TARGET_REG_WINDOWBASE] = tswapreg(env->sregs[WINDOW_BASE]);
1346 (*regs)[TARGET_REG_THREADPTR] = tswapreg(env->uregs[THREADPTR]);
1347 xtensa_sync_phys_from_window((CPUXtensaState *)env);
1348 for (i = 0; i < env->config->nareg; ++i) {
1349 (*regs)[TARGET_REG_AR0 + i] = tswapreg(env->phys_regs[i]);
1350 }
1351}
1352
1353#define USE_ELF_CORE_DUMP
1354#define ELF_EXEC_PAGESIZE 4096
1355
1356#endif /* TARGET_XTENSA */
1357
bellard15338fd2005-11-26 11:41:16 +00001358#ifndef ELF_PLATFORM
1359#define ELF_PLATFORM (NULL)
1360#endif
1361
Peter Crosthwaite75be9012015-07-19 05:02:37 -07001362#ifndef ELF_MACHINE
1363#define ELF_MACHINE ELF_ARCH
1364#endif
1365
Peter Crosthwaited276a602015-07-19 11:29:32 -07001366#ifndef elf_check_arch
1367#define elf_check_arch(x) ((x) == ELF_ARCH)
1368#endif
1369
bellard15338fd2005-11-26 11:41:16 +00001370#ifndef ELF_HWCAP
1371#define ELF_HWCAP 0
1372#endif
1373
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08001374#ifndef STACK_GROWS_DOWN
1375#define STACK_GROWS_DOWN 1
1376#endif
1377
1378#ifndef STACK_ALIGNMENT
1379#define STACK_ALIGNMENT 16
1380#endif
1381
blueswir1992f48a2007-10-14 16:27:31 +00001382#ifdef TARGET_ABI32
blueswir1cb33da52007-10-09 16:34:29 +00001383#undef ELF_CLASS
blueswir1992f48a2007-10-14 16:27:31 +00001384#define ELF_CLASS ELFCLASS32
blueswir1cb33da52007-10-09 16:34:29 +00001385#undef bswaptls
1386#define bswaptls(ptr) bswap32s(ptr)
1387#endif
1388
bellard31e31b82003-02-18 22:55:36 +00001389#include "elf.h"
bellard09bfb052003-04-10 00:03:40 +00001390
bellard09bfb052003-04-10 00:03:40 +00001391struct exec
1392{
Richard Hendersond97ef722010-07-27 10:25:29 -07001393 unsigned int a_info; /* Use macros N_MAGIC, etc for access */
1394 unsigned int a_text; /* length of text, in bytes */
1395 unsigned int a_data; /* length of data, in bytes */
1396 unsigned int a_bss; /* length of uninitialized data area, in bytes */
1397 unsigned int a_syms; /* length of symbol table data in file, in bytes */
1398 unsigned int a_entry; /* start address */
1399 unsigned int a_trsize; /* length of relocation info for text, in bytes */
1400 unsigned int a_drsize; /* length of relocation info for data, in bytes */
bellard09bfb052003-04-10 00:03:40 +00001401};
1402
1403
1404#define N_MAGIC(exec) ((exec).a_info & 0xffff)
1405#define OMAGIC 0407
1406#define NMAGIC 0410
1407#define ZMAGIC 0413
1408#define QMAGIC 0314
1409
bellard31e31b82003-02-18 22:55:36 +00001410/* Necessary parameters */
bellard54936002003-05-13 00:25:15 +00001411#define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
Yongbok Kim79cb1f12015-04-20 16:15:20 +01001412#define TARGET_ELF_PAGESTART(_v) ((_v) & \
1413 ~(abi_ulong)(TARGET_ELF_EXEC_PAGESIZE-1))
bellard54936002003-05-13 00:25:15 +00001414#define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
bellard31e31b82003-02-18 22:55:36 +00001415
Marco A L Barbosa444cd5c2018-01-11 16:37:14 -02001416#define DLINFO_ITEMS 15
bellard31e31b82003-02-18 22:55:36 +00001417
bellard09bfb052003-04-10 00:03:40 +00001418static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
1419{
Richard Hendersond97ef722010-07-27 10:25:29 -07001420 memcpy(to, from, n);
bellard09bfb052003-04-10 00:03:40 +00001421}
1422
bellard31e31b82003-02-18 22:55:36 +00001423#ifdef BSWAP_NEEDED
bellard92a31b12005-02-10 22:00:52 +00001424static void bswap_ehdr(struct elfhdr *ehdr)
bellard31e31b82003-02-18 22:55:36 +00001425{
Richard Hendersond97ef722010-07-27 10:25:29 -07001426 bswap16s(&ehdr->e_type); /* Object file type */
1427 bswap16s(&ehdr->e_machine); /* Architecture */
1428 bswap32s(&ehdr->e_version); /* Object file version */
1429 bswaptls(&ehdr->e_entry); /* Entry point virtual address */
1430 bswaptls(&ehdr->e_phoff); /* Program header table file offset */
1431 bswaptls(&ehdr->e_shoff); /* Section header table file offset */
1432 bswap32s(&ehdr->e_flags); /* Processor-specific flags */
1433 bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
1434 bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
1435 bswap16s(&ehdr->e_phnum); /* Program header table entry count */
1436 bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
1437 bswap16s(&ehdr->e_shnum); /* Section header table entry count */
1438 bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
bellard31e31b82003-02-18 22:55:36 +00001439}
1440
Richard Henderson991f8f02010-07-27 10:25:32 -07001441static void bswap_phdr(struct elf_phdr *phdr, int phnum)
bellard31e31b82003-02-18 22:55:36 +00001442{
Richard Henderson991f8f02010-07-27 10:25:32 -07001443 int i;
1444 for (i = 0; i < phnum; ++i, ++phdr) {
1445 bswap32s(&phdr->p_type); /* Segment type */
1446 bswap32s(&phdr->p_flags); /* Segment flags */
1447 bswaptls(&phdr->p_offset); /* Segment file offset */
1448 bswaptls(&phdr->p_vaddr); /* Segment virtual address */
1449 bswaptls(&phdr->p_paddr); /* Segment physical address */
1450 bswaptls(&phdr->p_filesz); /* Segment size in file */
1451 bswaptls(&phdr->p_memsz); /* Segment size in memory */
1452 bswaptls(&phdr->p_align); /* Segment alignment */
1453 }
bellard31e31b82003-02-18 22:55:36 +00001454}
bellard689f9362003-04-29 20:40:07 +00001455
Richard Henderson991f8f02010-07-27 10:25:32 -07001456static void bswap_shdr(struct elf_shdr *shdr, int shnum)
bellard689f9362003-04-29 20:40:07 +00001457{
Richard Henderson991f8f02010-07-27 10:25:32 -07001458 int i;
1459 for (i = 0; i < shnum; ++i, ++shdr) {
1460 bswap32s(&shdr->sh_name);
1461 bswap32s(&shdr->sh_type);
1462 bswaptls(&shdr->sh_flags);
1463 bswaptls(&shdr->sh_addr);
1464 bswaptls(&shdr->sh_offset);
1465 bswaptls(&shdr->sh_size);
1466 bswap32s(&shdr->sh_link);
1467 bswap32s(&shdr->sh_info);
1468 bswaptls(&shdr->sh_addralign);
1469 bswaptls(&shdr->sh_entsize);
1470 }
bellard689f9362003-04-29 20:40:07 +00001471}
1472
j_mayer7a3148a2007-04-05 07:13:51 +00001473static void bswap_sym(struct elf_sym *sym)
bellard689f9362003-04-29 20:40:07 +00001474{
1475 bswap32s(&sym->st_name);
j_mayer7a3148a2007-04-05 07:13:51 +00001476 bswaptls(&sym->st_value);
1477 bswaptls(&sym->st_size);
bellard689f9362003-04-29 20:40:07 +00001478 bswap16s(&sym->st_shndx);
1479}
Richard Henderson991f8f02010-07-27 10:25:32 -07001480#else
1481static inline void bswap_ehdr(struct elfhdr *ehdr) { }
1482static inline void bswap_phdr(struct elf_phdr *phdr, int phnum) { }
1483static inline void bswap_shdr(struct elf_shdr *shdr, int shnum) { }
1484static inline void bswap_sym(struct elf_sym *sym) { }
bellard31e31b82003-02-18 22:55:36 +00001485#endif
1486
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03001487#ifdef USE_ELF_CORE_DUMP
Andreas Färber9349b4f2012-03-14 01:38:32 +01001488static int elf_core_dump(int, const CPUArchState *);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03001489#endif /* USE_ELF_CORE_DUMP */
Richard Henderson682674b2010-07-27 10:25:33 -07001490static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03001491
Richard Henderson9058abd2010-07-27 10:25:34 -07001492/* Verify the portions of EHDR within E_IDENT for the target.
1493 This can be performed before bswapping the entire header. */
1494static bool elf_check_ident(struct elfhdr *ehdr)
1495{
1496 return (ehdr->e_ident[EI_MAG0] == ELFMAG0
1497 && ehdr->e_ident[EI_MAG1] == ELFMAG1
1498 && ehdr->e_ident[EI_MAG2] == ELFMAG2
1499 && ehdr->e_ident[EI_MAG3] == ELFMAG3
1500 && ehdr->e_ident[EI_CLASS] == ELF_CLASS
1501 && ehdr->e_ident[EI_DATA] == ELF_DATA
1502 && ehdr->e_ident[EI_VERSION] == EV_CURRENT);
1503}
1504
1505/* Verify the portions of EHDR outside of E_IDENT for the target.
1506 This has to wait until after bswapping the header. */
1507static bool elf_check_ehdr(struct elfhdr *ehdr)
1508{
1509 return (elf_check_arch(ehdr->e_machine)
1510 && ehdr->e_ehsize == sizeof(struct elfhdr)
1511 && ehdr->e_phentsize == sizeof(struct elf_phdr)
Richard Henderson9058abd2010-07-27 10:25:34 -07001512 && (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN));
1513}
1514
bellard31e31b82003-02-18 22:55:36 +00001515/*
pbrooke5fe0c52006-06-11 13:32:59 +00001516 * 'copy_elf_strings()' copies argument/envelope strings from user
bellard31e31b82003-02-18 22:55:36 +00001517 * memory to free pages in kernel mem. These are in a format ready
1518 * to be put directly into the top of new user memory.
1519 *
1520 */
Stefan Brüns59baae92015-09-02 03:38:53 +02001521static abi_ulong copy_elf_strings(int argc, char **argv, char *scratch,
1522 abi_ulong p, abi_ulong stack_limit)
bellard31e31b82003-02-18 22:55:36 +00001523{
Stefan Brüns59baae92015-09-02 03:38:53 +02001524 char *tmp;
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08001525 int len, i;
Stefan Brüns59baae92015-09-02 03:38:53 +02001526 abi_ulong top = p;
bellard31e31b82003-02-18 22:55:36 +00001527
1528 if (!p) {
Richard Hendersond97ef722010-07-27 10:25:29 -07001529 return 0; /* bullet-proofing */
bellard31e31b82003-02-18 22:55:36 +00001530 }
Stefan Brüns59baae92015-09-02 03:38:53 +02001531
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08001532 if (STACK_GROWS_DOWN) {
1533 int offset = ((p - 1) % TARGET_PAGE_SIZE) + 1;
1534 for (i = argc - 1; i >= 0; --i) {
1535 tmp = argv[i];
1536 if (!tmp) {
1537 fprintf(stderr, "VFS: argc is wrong");
1538 exit(-1);
1539 }
1540 len = strlen(tmp) + 1;
1541 tmp += len;
Stefan Brüns59baae92015-09-02 03:38:53 +02001542
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08001543 if (len > (p - stack_limit)) {
1544 return 0;
1545 }
1546 while (len) {
1547 int bytes_to_copy = (len > offset) ? offset : len;
1548 tmp -= bytes_to_copy;
1549 p -= bytes_to_copy;
1550 offset -= bytes_to_copy;
1551 len -= bytes_to_copy;
Stefan Brüns59baae92015-09-02 03:38:53 +02001552
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08001553 memcpy_fromfs(scratch + offset, tmp, bytes_to_copy);
Stefan Brüns59baae92015-09-02 03:38:53 +02001554
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08001555 if (offset == 0) {
1556 memcpy_to_target(p, scratch, top - p);
1557 top = p;
1558 offset = TARGET_PAGE_SIZE;
1559 }
Richard Hendersond97ef722010-07-27 10:25:29 -07001560 }
1561 }
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08001562 if (p != top) {
1563 memcpy_to_target(p, scratch + offset, top - p);
1564 }
1565 } else {
1566 int remaining = TARGET_PAGE_SIZE - (p % TARGET_PAGE_SIZE);
1567 for (i = 0; i < argc; ++i) {
1568 tmp = argv[i];
1569 if (!tmp) {
1570 fprintf(stderr, "VFS: argc is wrong");
1571 exit(-1);
1572 }
1573 len = strlen(tmp) + 1;
1574 if (len > (stack_limit - p)) {
1575 return 0;
1576 }
1577 while (len) {
1578 int bytes_to_copy = (len > remaining) ? remaining : len;
1579
1580 memcpy_fromfs(scratch + (p - top), tmp, bytes_to_copy);
1581
1582 tmp += bytes_to_copy;
1583 remaining -= bytes_to_copy;
1584 p += bytes_to_copy;
1585 len -= bytes_to_copy;
1586
1587 if (remaining == 0) {
1588 memcpy_to_target(top, scratch, p - top);
1589 top = p;
1590 remaining = TARGET_PAGE_SIZE;
1591 }
1592 }
1593 }
1594 if (p != top) {
1595 memcpy_to_target(top, scratch, p - top);
1596 }
Stefan Brüns59baae92015-09-02 03:38:53 +02001597 }
1598
bellard31e31b82003-02-18 22:55:36 +00001599 return p;
1600}
1601
Stefan Brüns59baae92015-09-02 03:38:53 +02001602/* Older linux kernels provide up to MAX_ARG_PAGES (default: 32) of
1603 * argument/environment space. Newer kernels (>2.6.33) allow more,
1604 * dependent on stack size, but guarantee at least 32 pages for
1605 * backwards compatibility.
1606 */
1607#define STACK_LOWER_LIMIT (32 * TARGET_PAGE_SIZE)
1608
1609static abi_ulong setup_arg_pages(struct linux_binprm *bprm,
blueswir1992f48a2007-10-14 16:27:31 +00001610 struct image_info *info)
pbrook53a59602006-03-25 19:31:22 +00001611{
Stefan Brüns59baae92015-09-02 03:38:53 +02001612 abi_ulong size, error, guard;
bellard31e31b82003-02-18 22:55:36 +00001613
Richard Henderson703e0e82010-03-19 14:21:13 -07001614 size = guest_stack_size;
Stefan Brüns59baae92015-09-02 03:38:53 +02001615 if (size < STACK_LOWER_LIMIT) {
1616 size = STACK_LOWER_LIMIT;
Richard Henderson60dcbcb2010-07-27 10:25:35 -07001617 }
1618 guard = TARGET_PAGE_SIZE;
1619 if (guard < qemu_real_host_page_size) {
1620 guard = qemu_real_host_page_size;
1621 }
1622
1623 error = target_mmap(0, size + guard, PROT_READ | PROT_WRITE,
1624 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
bellard09bfb052003-04-10 00:03:40 +00001625 if (error == -1) {
Richard Henderson60dcbcb2010-07-27 10:25:35 -07001626 perror("mmap stack");
bellard09bfb052003-04-10 00:03:40 +00001627 exit(-1);
bellard31e31b82003-02-18 22:55:36 +00001628 }
bellard09bfb052003-04-10 00:03:40 +00001629
Richard Henderson60dcbcb2010-07-27 10:25:35 -07001630 /* We reserve one extra page at the top of the stack as guard. */
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08001631 if (STACK_GROWS_DOWN) {
1632 target_mprotect(error, guard, PROT_NONE);
1633 info->stack_limit = error + guard;
1634 return info->stack_limit + size - sizeof(void *);
1635 } else {
1636 target_mprotect(error + size, guard, PROT_NONE);
1637 info->stack_limit = error + size;
1638 return error;
1639 }
bellard31e31b82003-02-18 22:55:36 +00001640}
1641
Richard Hendersoncf129f32010-07-27 10:25:27 -07001642/* Map and zero the bss. We need to explicitly zero any fractional pages
1643 after the data section (i.e. bss). */
1644static void zero_bss(abi_ulong elf_bss, abi_ulong last_bss, int prot)
bellard31e31b82003-02-18 22:55:36 +00001645{
Richard Hendersoncf129f32010-07-27 10:25:27 -07001646 uintptr_t host_start, host_map_start, host_end;
bellard31e31b82003-02-18 22:55:36 +00001647
Richard Hendersoncf129f32010-07-27 10:25:27 -07001648 last_bss = TARGET_PAGE_ALIGN(last_bss);
bellard31e31b82003-02-18 22:55:36 +00001649
Richard Hendersoncf129f32010-07-27 10:25:27 -07001650 /* ??? There is confusion between qemu_real_host_page_size and
1651 qemu_host_page_size here and elsewhere in target_mmap, which
1652 may lead to the end of the data section mapping from the file
1653 not being mapped. At least there was an explicit test and
1654 comment for that here, suggesting that "the file size must
1655 be known". The comment probably pre-dates the introduction
1656 of the fstat system call in target_mmap which does in fact
1657 find out the size. What isn't clear is if the workaround
1658 here is still actually needed. For now, continue with it,
1659 but merge it with the "normal" mmap that would allocate the bss. */
bellard31e31b82003-02-18 22:55:36 +00001660
Richard Hendersoncf129f32010-07-27 10:25:27 -07001661 host_start = (uintptr_t) g2h(elf_bss);
1662 host_end = (uintptr_t) g2h(last_bss);
Paolo Bonzini0c2d70c2015-12-02 13:00:54 +01001663 host_map_start = REAL_HOST_PAGE_ALIGN(host_start);
ths768a4a32006-12-14 13:32:11 +00001664
Richard Hendersoncf129f32010-07-27 10:25:27 -07001665 if (host_map_start < host_end) {
1666 void *p = mmap((void *)host_map_start, host_end - host_map_start,
1667 prot, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
1668 if (p == MAP_FAILED) {
1669 perror("cannot mmap brk");
1670 exit(-1);
bellard853d6f72003-09-30 20:58:32 +00001671 }
Tom Mustaf46e9a02014-05-29 09:12:23 -05001672 }
bellard853d6f72003-09-30 20:58:32 +00001673
Tom Mustaf46e9a02014-05-29 09:12:23 -05001674 /* Ensure that the bss page(s) are valid */
1675 if ((page_get_flags(last_bss-1) & prot) != prot) {
1676 page_set_flags(elf_bss & TARGET_PAGE_MASK, last_bss, prot | PAGE_VALID);
Richard Hendersoncf129f32010-07-27 10:25:27 -07001677 }
bellard31e31b82003-02-18 22:55:36 +00001678
Richard Hendersoncf129f32010-07-27 10:25:27 -07001679 if (host_start < host_map_start) {
1680 memset((void *)host_start, 0, host_map_start - host_start);
1681 }
1682}
bellardedf779f2004-02-22 13:40:13 +00001683
Mike Frysinger1af02e82011-02-07 01:05:50 -05001684#ifdef CONFIG_USE_FDPIC
1685static abi_ulong loader_build_fdpic_loadmap(struct image_info *info, abi_ulong sp)
1686{
1687 uint16_t n;
1688 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs;
1689
1690 /* elf32_fdpic_loadseg */
1691 n = info->nsegs;
1692 while (n--) {
1693 sp -= 12;
1694 put_user_u32(loadsegs[n].addr, sp+0);
1695 put_user_u32(loadsegs[n].p_vaddr, sp+4);
1696 put_user_u32(loadsegs[n].p_memsz, sp+8);
1697 }
1698
1699 /* elf32_fdpic_loadmap */
1700 sp -= 4;
1701 put_user_u16(0, sp+0); /* version */
1702 put_user_u16(info->nsegs, sp+2); /* nsegs */
1703
1704 info->personality = PER_LINUX_FDPIC;
1705 info->loadmap_addr = sp;
1706
1707 return sp;
1708}
1709#endif
1710
blueswir1992f48a2007-10-14 16:27:31 +00001711static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
Richard Henderson8e62a712010-07-27 10:25:37 -07001712 struct elfhdr *exec,
1713 struct image_info *info,
1714 struct image_info *interp_info)
pbrook53a59602006-03-25 19:31:22 +00001715{
Richard Hendersond97ef722010-07-27 10:25:29 -07001716 abi_ulong sp;
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08001717 abi_ulong u_argc, u_argv, u_envp, u_auxv;
Richard Hendersond97ef722010-07-27 10:25:29 -07001718 int size;
Laurent ALFONSI14322ba2011-06-20 08:43:13 +02001719 int i;
1720 abi_ulong u_rand_bytes;
1721 uint8_t k_rand_bytes[16];
Richard Hendersond97ef722010-07-27 10:25:29 -07001722 abi_ulong u_platform;
1723 const char *k_platform;
1724 const int n = sizeof(elf_addr_t);
pbrook53a59602006-03-25 19:31:22 +00001725
Richard Hendersond97ef722010-07-27 10:25:29 -07001726 sp = p;
Mike Frysinger1af02e82011-02-07 01:05:50 -05001727
1728#ifdef CONFIG_USE_FDPIC
1729 /* Needs to be before we load the env/argc/... */
1730 if (elf_is_fdpic(exec)) {
1731 /* Need 4 byte alignment for these structs */
1732 sp &= ~3;
1733 sp = loader_build_fdpic_loadmap(info, sp);
1734 info->other_info = interp_info;
1735 if (interp_info) {
1736 interp_info->other_info = info;
1737 sp = loader_build_fdpic_loadmap(interp_info, sp);
1738 }
1739 }
1740#endif
1741
Richard Hendersond97ef722010-07-27 10:25:29 -07001742 u_platform = 0;
1743 k_platform = ELF_PLATFORM;
1744 if (k_platform) {
1745 size_t len = strlen(k_platform) + 1;
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08001746 if (STACK_GROWS_DOWN) {
1747 sp -= (len + n - 1) & ~(n - 1);
1748 u_platform = sp;
1749 /* FIXME - check return value of memcpy_to_target() for failure */
1750 memcpy_to_target(sp, k_platform, len);
1751 } else {
1752 memcpy_to_target(sp, k_platform, len);
1753 u_platform = sp;
1754 sp += len + 1;
1755 }
1756 }
1757
1758 /* Provide 16 byte alignment for the PRNG, and basic alignment for
1759 * the argv and envp pointers.
1760 */
1761 if (STACK_GROWS_DOWN) {
1762 sp = QEMU_ALIGN_DOWN(sp, 16);
1763 } else {
1764 sp = QEMU_ALIGN_UP(sp, 16);
Richard Hendersond97ef722010-07-27 10:25:29 -07001765 }
Laurent ALFONSI14322ba2011-06-20 08:43:13 +02001766
1767 /*
1768 * Generate 16 random bytes for userspace PRNG seeding (not
1769 * cryptically secure but it's not the aim of QEMU).
1770 */
Laurent ALFONSI14322ba2011-06-20 08:43:13 +02001771 for (i = 0; i < 16; i++) {
1772 k_rand_bytes[i] = rand();
1773 }
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08001774 if (STACK_GROWS_DOWN) {
1775 sp -= 16;
1776 u_rand_bytes = sp;
1777 /* FIXME - check return value of memcpy_to_target() for failure */
1778 memcpy_to_target(sp, k_rand_bytes, 16);
1779 } else {
1780 memcpy_to_target(sp, k_rand_bytes, 16);
1781 u_rand_bytes = sp;
1782 sp += 16;
1783 }
Laurent ALFONSI14322ba2011-06-20 08:43:13 +02001784
Richard Hendersond97ef722010-07-27 10:25:29 -07001785 size = (DLINFO_ITEMS + 1) * 2;
1786 if (k_platform)
1787 size += 2;
bellardf5155282004-01-04 15:46:50 +00001788#ifdef DLINFO_ARCH_ITEMS
Richard Hendersond97ef722010-07-27 10:25:29 -07001789 size += DLINFO_ARCH_ITEMS * 2;
bellardf5155282004-01-04 15:46:50 +00001790#endif
Peter Maydellad6919d2014-05-02 14:45:15 +01001791#ifdef ELF_HWCAP2
1792 size += 2;
1793#endif
Peter Maydellf5165112017-11-07 18:25:18 +00001794 info->auxv_len = size * n;
1795
Richard Hendersond97ef722010-07-27 10:25:29 -07001796 size += envc + argc + 2;
Richard Hendersonb9329d42010-07-27 10:25:36 -07001797 size += 1; /* argc itself */
Richard Hendersond97ef722010-07-27 10:25:29 -07001798 size *= n;
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08001799
1800 /* Allocate space and finalize stack alignment for entry now. */
1801 if (STACK_GROWS_DOWN) {
1802 u_argc = QEMU_ALIGN_DOWN(sp - size, STACK_ALIGNMENT);
1803 sp = u_argc;
1804 } else {
1805 u_argc = sp;
1806 sp = QEMU_ALIGN_UP(sp + size, STACK_ALIGNMENT);
1807 }
1808
1809 u_argv = u_argc + n;
1810 u_envp = u_argv + (argc + 1) * n;
1811 u_auxv = u_envp + (envc + 1) * n;
1812 info->saved_auxv = u_auxv;
1813 info->arg_start = u_argv;
1814 info->arg_end = u_argv + argc * n;
ths3b46e622007-09-17 08:09:54 +00001815
Richard Hendersond97ef722010-07-27 10:25:29 -07001816 /* This is correct because Linux defines
1817 * elf_addr_t as Elf32_Off / Elf64_Off
1818 */
1819#define NEW_AUX_ENT(id, val) do { \
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08001820 put_user_ual(id, u_auxv); u_auxv += n; \
1821 put_user_ual(val, u_auxv); u_auxv += n; \
Richard Hendersond97ef722010-07-27 10:25:29 -07001822 } while(0)
bellard2f619692007-11-16 10:46:05 +00001823
Peter Maydell82991be2017-06-27 17:49:58 +01001824#ifdef ARCH_DLINFO
1825 /*
1826 * ARCH_DLINFO must come first so platform specific code can enforce
1827 * special alignment requirements on the AUXV if necessary (eg. PPC).
1828 */
1829 ARCH_DLINFO;
1830#endif
Peter Maydellf5165112017-11-07 18:25:18 +00001831 /* There must be exactly DLINFO_ITEMS entries here, or the assert
1832 * on info->auxv_len will trigger.
1833 */
Richard Henderson8e62a712010-07-27 10:25:37 -07001834 NEW_AUX_ENT(AT_PHDR, (abi_ulong)(info->load_addr + exec->e_phoff));
Richard Hendersond97ef722010-07-27 10:25:29 -07001835 NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr)));
1836 NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
Alexander Grafa70daba32014-06-05 11:39:43 +02001837 NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(MAX(TARGET_PAGE_SIZE, getpagesize())));
Richard Henderson8e62a712010-07-27 10:25:37 -07001838 NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_info ? interp_info->load_addr : 0));
Richard Hendersond97ef722010-07-27 10:25:29 -07001839 NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
Richard Henderson8e62a712010-07-27 10:25:37 -07001840 NEW_AUX_ENT(AT_ENTRY, info->entry);
Richard Hendersond97ef722010-07-27 10:25:29 -07001841 NEW_AUX_ENT(AT_UID, (abi_ulong) getuid());
1842 NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid());
1843 NEW_AUX_ENT(AT_GID, (abi_ulong) getgid());
1844 NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid());
1845 NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP);
1846 NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK));
Laurent ALFONSI14322ba2011-06-20 08:43:13 +02001847 NEW_AUX_ENT(AT_RANDOM, (abi_ulong) u_rand_bytes);
Marco A L Barbosa444cd5c2018-01-11 16:37:14 -02001848 NEW_AUX_ENT(AT_SECURE, (abi_ulong) qemu_getauxval(AT_SECURE));
Laurent ALFONSI14322ba2011-06-20 08:43:13 +02001849
Peter Maydellad6919d2014-05-02 14:45:15 +01001850#ifdef ELF_HWCAP2
1851 NEW_AUX_ENT(AT_HWCAP2, (abi_ulong) ELF_HWCAP2);
1852#endif
1853
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08001854 if (u_platform) {
Richard Hendersond97ef722010-07-27 10:25:29 -07001855 NEW_AUX_ENT(AT_PLATFORM, u_platform);
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08001856 }
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08001857 NEW_AUX_ENT (AT_NULL, 0);
bellardf5155282004-01-04 15:46:50 +00001858#undef NEW_AUX_ENT
1859
Peter Maydellf5165112017-11-07 18:25:18 +00001860 /* Check that our initial calculation of the auxv length matches how much
1861 * we actually put into it.
1862 */
1863 assert(info->auxv_len == u_auxv - info->saved_auxv);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03001864
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08001865 put_user_ual(argc, u_argc);
1866
1867 p = info->arg_strings;
1868 for (i = 0; i < argc; ++i) {
1869 put_user_ual(p, u_argv);
1870 u_argv += n;
1871 p += target_strlen(p) + 1;
1872 }
1873 put_user_ual(0, u_argv);
1874
1875 p = info->env_strings;
1876 for (i = 0; i < envc; ++i) {
1877 put_user_ual(p, u_envp);
1878 u_envp += n;
1879 p += target_strlen(p) + 1;
1880 }
1881 put_user_ual(0, u_envp);
1882
Richard Hendersond97ef722010-07-27 10:25:29 -07001883 return sp;
bellard31e31b82003-02-18 22:55:36 +00001884}
1885
Meador Ingedce10402012-07-26 16:50:01 +00001886unsigned long init_guest_space(unsigned long host_start,
1887 unsigned long host_size,
1888 unsigned long guest_start,
1889 bool fixed)
1890{
Luke Shumaker293f2062017-12-28 13:08:08 -05001891 unsigned long current_start, aligned_start;
Meador Ingedce10402012-07-26 16:50:01 +00001892 int flags;
1893
1894 assert(host_start || host_size);
1895
1896 /* If just a starting address is given, then just verify that
1897 * address. */
1898 if (host_start && !host_size) {
Luke Shumaker8756e132017-12-28 13:08:04 -05001899#if defined(TARGET_ARM) && !defined(TARGET_AARCH64)
Luke Shumakerc3637ea2017-12-28 13:08:05 -05001900 if (init_guest_commpage(host_start, host_size) != 1) {
Meador Ingedce10402012-07-26 16:50:01 +00001901 return (unsigned long)-1;
1902 }
Luke Shumaker8756e132017-12-28 13:08:04 -05001903#endif
1904 return host_start;
Meador Ingedce10402012-07-26 16:50:01 +00001905 }
1906
1907 /* Setup the initial flags and start address. */
1908 current_start = host_start & qemu_host_page_mask;
1909 flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE;
1910 if (fixed) {
1911 flags |= MAP_FIXED;
1912 }
1913
1914 /* Otherwise, a non-zero size region of memory needs to be mapped
1915 * and validated. */
Luke Shumaker2a535352017-12-28 13:08:13 -05001916
1917#if defined(TARGET_ARM) && !defined(TARGET_AARCH64)
1918 /* On 32-bit ARM, we need to map not just the usable memory, but
1919 * also the commpage. Try to find a suitable place by allocating
1920 * a big chunk for all of it. If host_start, then the naive
1921 * strategy probably does good enough.
1922 */
1923 if (!host_start) {
1924 unsigned long guest_full_size, host_full_size, real_start;
1925
1926 guest_full_size =
1927 (0xffff0f00 & qemu_host_page_mask) + qemu_host_page_size;
1928 host_full_size = guest_full_size - guest_start;
1929 real_start = (unsigned long)
1930 mmap(NULL, host_full_size, PROT_NONE, flags, -1, 0);
1931 if (real_start == (unsigned long)-1) {
1932 if (host_size < host_full_size - qemu_host_page_size) {
1933 /* We failed to map a continous segment, but we're
1934 * allowed to have a gap between the usable memory and
1935 * the commpage where other things can be mapped.
1936 * This sparseness gives us more flexibility to find
1937 * an address range.
1938 */
1939 goto naive;
1940 }
1941 return (unsigned long)-1;
1942 }
1943 munmap((void *)real_start, host_full_size);
1944 if (real_start & ~qemu_host_page_mask) {
1945 /* The same thing again, but with an extra qemu_host_page_size
1946 * so that we can shift around alignment.
1947 */
1948 unsigned long real_size = host_full_size + qemu_host_page_size;
1949 real_start = (unsigned long)
1950 mmap(NULL, real_size, PROT_NONE, flags, -1, 0);
1951 if (real_start == (unsigned long)-1) {
1952 if (host_size < host_full_size - qemu_host_page_size) {
1953 goto naive;
1954 }
1955 return (unsigned long)-1;
1956 }
1957 munmap((void *)real_start, real_size);
1958 real_start = HOST_PAGE_ALIGN(real_start);
1959 }
1960 current_start = real_start;
1961 }
1962 naive:
1963#endif
1964
Meador Ingedce10402012-07-26 16:50:01 +00001965 while (1) {
Luke Shumaker293f2062017-12-28 13:08:08 -05001966 unsigned long real_start, real_size, aligned_size;
1967 aligned_size = real_size = host_size;
Meador Inge806d1022012-07-26 16:50:02 +00001968
Meador Ingedce10402012-07-26 16:50:01 +00001969 /* Do not use mmap_find_vma here because that is limited to the
1970 * guest address space. We are going to make the
1971 * guest address space fit whatever we're given.
1972 */
1973 real_start = (unsigned long)
1974 mmap((void *)current_start, host_size, PROT_NONE, flags, -1, 0);
1975 if (real_start == (unsigned long)-1) {
1976 return (unsigned long)-1;
1977 }
1978
Luke Shumakeraac362e2017-12-28 13:08:11 -05001979 /* Check to see if the address is valid. */
1980 if (host_start && real_start != current_start) {
1981 goto try_again;
1982 }
1983
Meador Inge806d1022012-07-26 16:50:02 +00001984 /* Ensure the address is properly aligned. */
1985 if (real_start & ~qemu_host_page_mask) {
Luke Shumaker293f2062017-12-28 13:08:08 -05001986 /* Ideally, we adjust like
1987 *
1988 * pages: [ ][ ][ ][ ][ ]
1989 * old: [ real ]
1990 * [ aligned ]
1991 * new: [ real ]
1992 * [ aligned ]
1993 *
1994 * But if there is something else mapped right after it,
1995 * then obviously it won't have room to grow, and the
1996 * kernel will put the new larger real someplace else with
1997 * unknown alignment (if we made it to here, then
1998 * fixed=false). Which is why we grow real by a full page
1999 * size, instead of by part of one; so that even if we get
2000 * moved, we can still guarantee alignment. But this does
2001 * mean that there is a padding of < 1 page both before
2002 * and after the aligned range; the "after" could could
2003 * cause problems for ARM emulation where it could butt in
2004 * to where we need to put the commpage.
2005 */
Meador Inge806d1022012-07-26 16:50:02 +00002006 munmap((void *)real_start, host_size);
Luke Shumaker293f2062017-12-28 13:08:08 -05002007 real_size = aligned_size + qemu_host_page_size;
Meador Inge806d1022012-07-26 16:50:02 +00002008 real_start = (unsigned long)
2009 mmap((void *)real_start, real_size, PROT_NONE, flags, -1, 0);
2010 if (real_start == (unsigned long)-1) {
2011 return (unsigned long)-1;
2012 }
Luke Shumaker293f2062017-12-28 13:08:08 -05002013 aligned_start = HOST_PAGE_ALIGN(real_start);
2014 } else {
2015 aligned_start = real_start;
Meador Inge806d1022012-07-26 16:50:02 +00002016 }
2017
Luke Shumaker7ad75ee2017-12-28 13:08:10 -05002018#if defined(TARGET_ARM) && !defined(TARGET_AARCH64)
2019 /* On 32-bit ARM, we need to also be able to map the commpage. */
2020 int valid = init_guest_commpage(aligned_start - guest_start,
2021 aligned_size + guest_start);
2022 if (valid == -1) {
2023 munmap((void *)real_start, real_size);
2024 return (unsigned long)-1;
2025 } else if (valid == 0) {
2026 goto try_again;
2027 }
2028#endif
2029
2030 /* If nothing has said `return -1` or `goto try_again` yet,
2031 * then the address we have is good.
2032 */
2033 break;
2034
2035 try_again:
Meador Ingedce10402012-07-26 16:50:01 +00002036 /* That address didn't work. Unmap and try a different one.
2037 * The address the host picked because is typically right at
2038 * the top of the host address space and leaves the guest with
2039 * no usable address space. Resort to a linear search. We
2040 * already compensated for mmap_min_addr, so this should not
2041 * happen often. Probably means we got unlucky and host
2042 * address space randomization put a shared library somewhere
2043 * inconvenient.
Luke Shumaker8c17d862017-12-28 13:08:12 -05002044 *
2045 * This is probably a good strategy if host_start, but is
2046 * probably a bad strategy if not, which means we got here
2047 * because of trouble with ARM commpage setup.
Meador Ingedce10402012-07-26 16:50:01 +00002048 */
Luke Shumaker293f2062017-12-28 13:08:08 -05002049 munmap((void *)real_start, real_size);
Meador Ingedce10402012-07-26 16:50:01 +00002050 current_start += qemu_host_page_size;
2051 if (host_start == current_start) {
2052 /* Theoretically possible if host doesn't have any suitably
2053 * aligned areas. Normally the first mmap will fail.
2054 */
2055 return (unsigned long)-1;
2056 }
2057 }
2058
Paolo Bonzini13829022015-11-13 12:32:19 +01002059 qemu_log_mask(CPU_LOG_PAGE, "Reserved 0x%lx bytes of guest address space\n", host_size);
Meador Inge806d1022012-07-26 16:50:02 +00002060
Luke Shumaker293f2062017-12-28 13:08:08 -05002061 return aligned_start;
Meador Ingedce10402012-07-26 16:50:01 +00002062}
2063
Peter Maydellf3ed1f52011-05-17 13:34:46 +01002064static void probe_guest_base(const char *image_name,
2065 abi_ulong loaddr, abi_ulong hiaddr)
2066{
2067 /* Probe for a suitable guest base address, if the user has not set
2068 * it explicitly, and set guest_base appropriately.
2069 * In case of error we will print a suitable message and exit.
2070 */
Peter Maydellf3ed1f52011-05-17 13:34:46 +01002071 const char *errmsg;
2072 if (!have_guest_base && !reserved_va) {
2073 unsigned long host_start, real_start, host_size;
2074
2075 /* Round addresses to page boundaries. */
2076 loaddr &= qemu_host_page_mask;
2077 hiaddr = HOST_PAGE_ALIGN(hiaddr);
2078
2079 if (loaddr < mmap_min_addr) {
2080 host_start = HOST_PAGE_ALIGN(mmap_min_addr);
2081 } else {
2082 host_start = loaddr;
2083 if (host_start != loaddr) {
2084 errmsg = "Address overflow loading ELF binary";
2085 goto exit_errmsg;
2086 }
2087 }
2088 host_size = hiaddr - loaddr;
Meador Ingedce10402012-07-26 16:50:01 +00002089
2090 /* Setup the initial guest memory space with ranges gleaned from
2091 * the ELF image that is being loaded.
2092 */
2093 real_start = init_guest_space(host_start, host_size, loaddr, false);
2094 if (real_start == (unsigned long)-1) {
2095 errmsg = "Unable to find space for application";
2096 goto exit_errmsg;
Peter Maydellf3ed1f52011-05-17 13:34:46 +01002097 }
Meador Ingedce10402012-07-26 16:50:01 +00002098 guest_base = real_start - loaddr;
2099
Paolo Bonzini13829022015-11-13 12:32:19 +01002100 qemu_log_mask(CPU_LOG_PAGE, "Relocating guest address space from 0x"
2101 TARGET_ABI_FMT_lx " to 0x%lx\n",
2102 loaddr, real_start);
Peter Maydellf3ed1f52011-05-17 13:34:46 +01002103 }
2104 return;
2105
Peter Maydellf3ed1f52011-05-17 13:34:46 +01002106exit_errmsg:
2107 fprintf(stderr, "%s: %s\n", image_name, errmsg);
2108 exit(-1);
Peter Maydellf3ed1f52011-05-17 13:34:46 +01002109}
2110
2111
Richard Henderson8e62a712010-07-27 10:25:37 -07002112/* Load an ELF image into the address space.
bellard31e31b82003-02-18 22:55:36 +00002113
Richard Henderson8e62a712010-07-27 10:25:37 -07002114 IMAGE_NAME is the filename of the image, to use in error messages.
2115 IMAGE_FD is the open file descriptor for the image.
2116
2117 BPRM_BUF is a copy of the beginning of the file; this of course
2118 contains the elf file header at offset 0. It is assumed that this
2119 buffer is sufficiently aligned to present no problems to the host
2120 in accessing data at aligned offsets within the buffer.
2121
2122 On return: INFO values will be filled in, as necessary or available. */
2123
2124static void load_elf_image(const char *image_name, int image_fd,
Richard Hendersonbf858892010-07-27 10:25:38 -07002125 struct image_info *info, char **pinterp_name,
Richard Henderson8e62a712010-07-27 10:25:37 -07002126 char bprm_buf[BPRM_BUF_SIZE])
bellard31e31b82003-02-18 22:55:36 +00002127{
Richard Henderson8e62a712010-07-27 10:25:37 -07002128 struct elfhdr *ehdr = (struct elfhdr *)bprm_buf;
2129 struct elf_phdr *phdr;
2130 abi_ulong load_addr, load_bias, loaddr, hiaddr, error;
2131 int i, retval;
2132 const char *errmsg;
ths5fafdf22007-09-16 21:08:06 +00002133
Richard Henderson8e62a712010-07-27 10:25:37 -07002134 /* First of all, some simple consistency checks */
2135 errmsg = "Invalid ELF image for this architecture";
2136 if (!elf_check_ident(ehdr)) {
2137 goto exit_errmsg;
2138 }
2139 bswap_ehdr(ehdr);
2140 if (!elf_check_ehdr(ehdr)) {
2141 goto exit_errmsg;
Richard Hendersond97ef722010-07-27 10:25:29 -07002142 }
ths5fafdf22007-09-16 21:08:06 +00002143
Richard Henderson8e62a712010-07-27 10:25:37 -07002144 i = ehdr->e_phnum * sizeof(struct elf_phdr);
2145 if (ehdr->e_phoff + i <= BPRM_BUF_SIZE) {
2146 phdr = (struct elf_phdr *)(bprm_buf + ehdr->e_phoff);
Richard Henderson9955ffa2010-07-27 10:25:30 -07002147 } else {
Richard Henderson8e62a712010-07-27 10:25:37 -07002148 phdr = (struct elf_phdr *) alloca(i);
2149 retval = pread(image_fd, phdr, i, ehdr->e_phoff);
Richard Henderson9955ffa2010-07-27 10:25:30 -07002150 if (retval != i) {
Richard Henderson8e62a712010-07-27 10:25:37 -07002151 goto exit_read;
Richard Henderson9955ffa2010-07-27 10:25:30 -07002152 }
Richard Hendersond97ef722010-07-27 10:25:29 -07002153 }
Richard Henderson8e62a712010-07-27 10:25:37 -07002154 bswap_phdr(phdr, ehdr->e_phnum);
bellard09bfb052003-04-10 00:03:40 +00002155
Mike Frysinger1af02e82011-02-07 01:05:50 -05002156#ifdef CONFIG_USE_FDPIC
2157 info->nsegs = 0;
2158 info->pt_dynamic_addr = 0;
2159#endif
2160
Alex Bennée98c10762016-10-27 16:10:04 +01002161 mmap_lock();
2162
Richard Henderson682674b2010-07-27 10:25:33 -07002163 /* Find the maximum size of the image and allocate an appropriate
2164 amount of memory to handle that. */
2165 loaddr = -1, hiaddr = 0;
Richard Henderson8e62a712010-07-27 10:25:37 -07002166 for (i = 0; i < ehdr->e_phnum; ++i) {
2167 if (phdr[i].p_type == PT_LOAD) {
Jonas Maebea93934f2014-10-24 16:07:15 +02002168 abi_ulong a = phdr[i].p_vaddr - phdr[i].p_offset;
Richard Henderson682674b2010-07-27 10:25:33 -07002169 if (a < loaddr) {
2170 loaddr = a;
2171 }
Tom Mustaccf661f2014-11-06 13:43:13 -06002172 a = phdr[i].p_vaddr + phdr[i].p_memsz;
Richard Henderson682674b2010-07-27 10:25:33 -07002173 if (a > hiaddr) {
2174 hiaddr = a;
2175 }
Mike Frysinger1af02e82011-02-07 01:05:50 -05002176#ifdef CONFIG_USE_FDPIC
2177 ++info->nsegs;
2178#endif
Richard Henderson682674b2010-07-27 10:25:33 -07002179 }
2180 }
2181
2182 load_addr = loaddr;
Richard Henderson8e62a712010-07-27 10:25:37 -07002183 if (ehdr->e_type == ET_DYN) {
Richard Henderson682674b2010-07-27 10:25:33 -07002184 /* The image indicates that it can be loaded anywhere. Find a
2185 location that can hold the memory space required. If the
2186 image is pre-linked, LOADDR will be non-zero. Since we do
2187 not supply MAP_FIXED here we'll use that address if and
2188 only if it remains available. */
2189 load_addr = target_mmap(loaddr, hiaddr - loaddr, PROT_NONE,
2190 MAP_PRIVATE | MAP_ANON | MAP_NORESERVE,
2191 -1, 0);
2192 if (load_addr == -1) {
Richard Henderson8e62a712010-07-27 10:25:37 -07002193 goto exit_perror;
Richard Hendersond97ef722010-07-27 10:25:29 -07002194 }
Richard Hendersonbf858892010-07-27 10:25:38 -07002195 } else if (pinterp_name != NULL) {
2196 /* This is the main executable. Make sure that the low
2197 address does not conflict with MMAP_MIN_ADDR or the
2198 QEMU application itself. */
Peter Maydellf3ed1f52011-05-17 13:34:46 +01002199 probe_guest_base(image_name, loaddr, hiaddr);
Richard Hendersond97ef722010-07-27 10:25:29 -07002200 }
Richard Henderson682674b2010-07-27 10:25:33 -07002201 load_bias = load_addr - loaddr;
Richard Hendersond97ef722010-07-27 10:25:29 -07002202
Mike Frysinger1af02e82011-02-07 01:05:50 -05002203#ifdef CONFIG_USE_FDPIC
2204 {
2205 struct elf32_fdpic_loadseg *loadsegs = info->loadsegs =
Anthony Liguori7267c092011-08-20 22:09:37 -05002206 g_malloc(sizeof(*loadsegs) * info->nsegs);
Mike Frysinger1af02e82011-02-07 01:05:50 -05002207
2208 for (i = 0; i < ehdr->e_phnum; ++i) {
2209 switch (phdr[i].p_type) {
2210 case PT_DYNAMIC:
2211 info->pt_dynamic_addr = phdr[i].p_vaddr + load_bias;
2212 break;
2213 case PT_LOAD:
2214 loadsegs->addr = phdr[i].p_vaddr + load_bias;
2215 loadsegs->p_vaddr = phdr[i].p_vaddr;
2216 loadsegs->p_memsz = phdr[i].p_memsz;
2217 ++loadsegs;
2218 break;
2219 }
2220 }
2221 }
2222#endif
2223
Richard Henderson8e62a712010-07-27 10:25:37 -07002224 info->load_bias = load_bias;
2225 info->load_addr = load_addr;
2226 info->entry = ehdr->e_entry + load_bias;
2227 info->start_code = -1;
2228 info->end_code = 0;
2229 info->start_data = -1;
2230 info->end_data = 0;
2231 info->brk = 0;
Paul Brookd8fd2952012-03-30 18:02:50 +01002232 info->elf_flags = ehdr->e_flags;
Richard Henderson8e62a712010-07-27 10:25:37 -07002233
2234 for (i = 0; i < ehdr->e_phnum; i++) {
2235 struct elf_phdr *eppnt = phdr + i;
Richard Hendersond97ef722010-07-27 10:25:29 -07002236 if (eppnt->p_type == PT_LOAD) {
Richard Henderson682674b2010-07-27 10:25:33 -07002237 abi_ulong vaddr, vaddr_po, vaddr_ps, vaddr_ef, vaddr_em;
Richard Hendersond97ef722010-07-27 10:25:29 -07002238 int elf_prot = 0;
Richard Hendersond97ef722010-07-27 10:25:29 -07002239
2240 if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
2241 if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
2242 if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
bellard09bfb052003-04-10 00:03:40 +00002243
Richard Henderson682674b2010-07-27 10:25:33 -07002244 vaddr = load_bias + eppnt->p_vaddr;
2245 vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr);
2246 vaddr_ps = TARGET_ELF_PAGESTART(vaddr);
2247
2248 error = target_mmap(vaddr_ps, eppnt->p_filesz + vaddr_po,
2249 elf_prot, MAP_PRIVATE | MAP_FIXED,
Richard Henderson8e62a712010-07-27 10:25:37 -07002250 image_fd, eppnt->p_offset - vaddr_po);
Richard Hendersond97ef722010-07-27 10:25:29 -07002251 if (error == -1) {
Richard Henderson8e62a712010-07-27 10:25:37 -07002252 goto exit_perror;
Richard Hendersond97ef722010-07-27 10:25:29 -07002253 }
bellard31e31b82003-02-18 22:55:36 +00002254
Richard Henderson682674b2010-07-27 10:25:33 -07002255 vaddr_ef = vaddr + eppnt->p_filesz;
2256 vaddr_em = vaddr + eppnt->p_memsz;
bellard31e31b82003-02-18 22:55:36 +00002257
Richard Hendersoncf129f32010-07-27 10:25:27 -07002258 /* If the load segment requests extra zeros (e.g. bss), map it. */
Richard Henderson682674b2010-07-27 10:25:33 -07002259 if (vaddr_ef < vaddr_em) {
2260 zero_bss(vaddr_ef, vaddr_em, elf_prot);
Richard Hendersoncf129f32010-07-27 10:25:27 -07002261 }
Richard Henderson8e62a712010-07-27 10:25:37 -07002262
2263 /* Find the full program boundaries. */
2264 if (elf_prot & PROT_EXEC) {
2265 if (vaddr < info->start_code) {
2266 info->start_code = vaddr;
2267 }
2268 if (vaddr_ef > info->end_code) {
2269 info->end_code = vaddr_ef;
2270 }
2271 }
2272 if (elf_prot & PROT_WRITE) {
2273 if (vaddr < info->start_data) {
2274 info->start_data = vaddr;
2275 }
2276 if (vaddr_ef > info->end_data) {
2277 info->end_data = vaddr_ef;
2278 }
2279 if (vaddr_em > info->brk) {
2280 info->brk = vaddr_em;
2281 }
2282 }
Richard Hendersonbf858892010-07-27 10:25:38 -07002283 } else if (eppnt->p_type == PT_INTERP && pinterp_name) {
2284 char *interp_name;
2285
2286 if (*pinterp_name) {
2287 errmsg = "Multiple PT_INTERP entries";
2288 goto exit_errmsg;
2289 }
2290 interp_name = malloc(eppnt->p_filesz);
2291 if (!interp_name) {
2292 goto exit_perror;
2293 }
2294
2295 if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
2296 memcpy(interp_name, bprm_buf + eppnt->p_offset,
2297 eppnt->p_filesz);
2298 } else {
2299 retval = pread(image_fd, interp_name, eppnt->p_filesz,
2300 eppnt->p_offset);
2301 if (retval != eppnt->p_filesz) {
2302 goto exit_perror;
2303 }
2304 }
2305 if (interp_name[eppnt->p_filesz - 1] != 0) {
2306 errmsg = "Invalid PT_INTERP entry";
2307 goto exit_errmsg;
2308 }
2309 *pinterp_name = interp_name;
Richard Hendersond97ef722010-07-27 10:25:29 -07002310 }
Richard Henderson682674b2010-07-27 10:25:33 -07002311 }
ths5fafdf22007-09-16 21:08:06 +00002312
Richard Henderson8e62a712010-07-27 10:25:37 -07002313 if (info->end_data == 0) {
2314 info->start_data = info->end_code;
2315 info->end_data = info->end_code;
2316 info->brk = info->end_code;
Richard Henderson682674b2010-07-27 10:25:33 -07002317 }
bellard31e31b82003-02-18 22:55:36 +00002318
Richard Henderson8e62a712010-07-27 10:25:37 -07002319 if (qemu_log_enabled()) {
2320 load_symbols(ehdr, image_fd, load_bias);
2321 }
bellard31e31b82003-02-18 22:55:36 +00002322
Alex Bennée98c10762016-10-27 16:10:04 +01002323 mmap_unlock();
2324
Richard Henderson8e62a712010-07-27 10:25:37 -07002325 close(image_fd);
2326 return;
2327
2328 exit_read:
2329 if (retval >= 0) {
2330 errmsg = "Incomplete read of file header";
2331 goto exit_errmsg;
2332 }
2333 exit_perror:
2334 errmsg = strerror(errno);
2335 exit_errmsg:
2336 fprintf(stderr, "%s: %s\n", image_name, errmsg);
2337 exit(-1);
2338}
2339
2340static void load_elf_interp(const char *filename, struct image_info *info,
2341 char bprm_buf[BPRM_BUF_SIZE])
2342{
2343 int fd, retval;
2344
2345 fd = open(path(filename), O_RDONLY);
2346 if (fd < 0) {
2347 goto exit_perror;
2348 }
2349
2350 retval = read(fd, bprm_buf, BPRM_BUF_SIZE);
2351 if (retval < 0) {
2352 goto exit_perror;
2353 }
2354 if (retval < BPRM_BUF_SIZE) {
2355 memset(bprm_buf + retval, 0, BPRM_BUF_SIZE - retval);
2356 }
2357
Richard Hendersonbf858892010-07-27 10:25:38 -07002358 load_elf_image(filename, fd, info, NULL, bprm_buf);
Richard Henderson8e62a712010-07-27 10:25:37 -07002359 return;
2360
2361 exit_perror:
2362 fprintf(stderr, "%s: %s\n", filename, strerror(errno));
2363 exit(-1);
bellard31e31b82003-02-18 22:55:36 +00002364}
2365
pbrook49918a72008-10-22 15:11:31 +00002366static int symfind(const void *s0, const void *s1)
2367{
Stefan Weilc7c530c2012-01-05 15:39:39 +01002368 target_ulong addr = *(target_ulong *)s0;
pbrook49918a72008-10-22 15:11:31 +00002369 struct elf_sym *sym = (struct elf_sym *)s1;
2370 int result = 0;
Stefan Weilc7c530c2012-01-05 15:39:39 +01002371 if (addr < sym->st_value) {
pbrook49918a72008-10-22 15:11:31 +00002372 result = -1;
Stefan Weilc7c530c2012-01-05 15:39:39 +01002373 } else if (addr >= sym->st_value + sym->st_size) {
pbrook49918a72008-10-22 15:11:31 +00002374 result = 1;
2375 }
2376 return result;
2377}
2378
2379static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr)
2380{
2381#if ELF_CLASS == ELFCLASS32
2382 struct elf_sym *syms = s->disas_symtab.elf32;
2383#else
2384 struct elf_sym *syms = s->disas_symtab.elf64;
2385#endif
2386
2387 // binary search
pbrook49918a72008-10-22 15:11:31 +00002388 struct elf_sym *sym;
2389
Stefan Weilc7c530c2012-01-05 15:39:39 +01002390 sym = bsearch(&orig_addr, syms, s->disas_num_syms, sizeof(*syms), symfind);
Blue Swirl7cba04f2009-08-01 10:13:20 +00002391 if (sym != NULL) {
pbrook49918a72008-10-22 15:11:31 +00002392 return s->disas_strtab + sym->st_name;
2393 }
2394
2395 return "";
2396}
2397
2398/* FIXME: This should use elf_ops.h */
2399static int symcmp(const void *s0, const void *s1)
2400{
2401 struct elf_sym *sym0 = (struct elf_sym *)s0;
2402 struct elf_sym *sym1 = (struct elf_sym *)s1;
2403 return (sym0->st_value < sym1->st_value)
2404 ? -1
2405 : ((sym0->st_value > sym1->st_value) ? 1 : 0);
2406}
2407
bellard689f9362003-04-29 20:40:07 +00002408/* Best attempt to load symbols from this ELF object. */
Richard Henderson682674b2010-07-27 10:25:33 -07002409static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias)
bellard689f9362003-04-29 20:40:07 +00002410{
Richard Henderson682674b2010-07-27 10:25:33 -07002411 int i, shnum, nsyms, sym_idx = 0, str_idx = 0;
Peter Maydell1e062622017-02-04 23:05:33 +00002412 uint64_t segsz;
Richard Henderson682674b2010-07-27 10:25:33 -07002413 struct elf_shdr *shdr;
Cédric VINCENTb9475272011-06-01 14:36:38 +02002414 char *strings = NULL;
2415 struct syminfo *s = NULL;
2416 struct elf_sym *new_syms, *syms = NULL;
bellard31e31b82003-02-18 22:55:36 +00002417
Richard Henderson682674b2010-07-27 10:25:33 -07002418 shnum = hdr->e_shnum;
2419 i = shnum * sizeof(struct elf_shdr);
2420 shdr = (struct elf_shdr *)alloca(i);
2421 if (pread(fd, shdr, i, hdr->e_shoff) != i) {
2422 return;
2423 }
2424
2425 bswap_shdr(shdr, shnum);
2426 for (i = 0; i < shnum; ++i) {
2427 if (shdr[i].sh_type == SHT_SYMTAB) {
2428 sym_idx = i;
2429 str_idx = shdr[i].sh_link;
pbrook49918a72008-10-22 15:11:31 +00002430 goto found;
2431 }
bellard689f9362003-04-29 20:40:07 +00002432 }
Richard Henderson682674b2010-07-27 10:25:33 -07002433
2434 /* There will be no symbol table if the file was stripped. */
2435 return;
bellard689f9362003-04-29 20:40:07 +00002436
2437 found:
Richard Henderson682674b2010-07-27 10:25:33 -07002438 /* Now know where the strtab and symtab are. Snarf them. */
Peter Maydell0ef9ea22016-07-12 13:02:18 +01002439 s = g_try_new(struct syminfo, 1);
Richard Henderson682674b2010-07-27 10:25:33 -07002440 if (!s) {
Cédric VINCENTb9475272011-06-01 14:36:38 +02002441 goto give_up;
Richard Henderson682674b2010-07-27 10:25:33 -07002442 }
2443
Peter Maydell1e062622017-02-04 23:05:33 +00002444 segsz = shdr[str_idx].sh_size;
2445 s->disas_strtab = strings = g_try_malloc(segsz);
2446 if (!strings ||
2447 pread(fd, strings, segsz, shdr[str_idx].sh_offset) != segsz) {
Cédric VINCENTb9475272011-06-01 14:36:38 +02002448 goto give_up;
Richard Henderson682674b2010-07-27 10:25:33 -07002449 }
ths5fafdf22007-09-16 21:08:06 +00002450
Peter Maydell1e062622017-02-04 23:05:33 +00002451 segsz = shdr[sym_idx].sh_size;
2452 syms = g_try_malloc(segsz);
2453 if (!syms || pread(fd, syms, segsz, shdr[sym_idx].sh_offset) != segsz) {
Cédric VINCENTb9475272011-06-01 14:36:38 +02002454 goto give_up;
Richard Henderson682674b2010-07-27 10:25:33 -07002455 }
bellard689f9362003-04-29 20:40:07 +00002456
Peter Maydell1e062622017-02-04 23:05:33 +00002457 if (segsz / sizeof(struct elf_sym) > INT_MAX) {
2458 /* Implausibly large symbol table: give up rather than ploughing
2459 * on with the number of symbols calculation overflowing
2460 */
2461 goto give_up;
2462 }
2463 nsyms = segsz / sizeof(struct elf_sym);
Richard Henderson682674b2010-07-27 10:25:33 -07002464 for (i = 0; i < nsyms; ) {
pbrook49918a72008-10-22 15:11:31 +00002465 bswap_sym(syms + i);
Richard Henderson682674b2010-07-27 10:25:33 -07002466 /* Throw away entries which we do not need. */
2467 if (syms[i].st_shndx == SHN_UNDEF
2468 || syms[i].st_shndx >= SHN_LORESERVE
2469 || ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
2470 if (i < --nsyms) {
pbrook49918a72008-10-22 15:11:31 +00002471 syms[i] = syms[nsyms];
2472 }
Richard Henderson682674b2010-07-27 10:25:33 -07002473 } else {
pbrook49918a72008-10-22 15:11:31 +00002474#if defined(TARGET_ARM) || defined (TARGET_MIPS)
Richard Henderson682674b2010-07-27 10:25:33 -07002475 /* The bottom address bit marks a Thumb or MIPS16 symbol. */
2476 syms[i].st_value &= ~(target_ulong)1;
blueswir10774bed2007-07-05 13:23:29 +00002477#endif
Richard Henderson682674b2010-07-27 10:25:33 -07002478 syms[i].st_value += load_bias;
2479 i++;
2480 }
blueswir10774bed2007-07-05 13:23:29 +00002481 }
bellard689f9362003-04-29 20:40:07 +00002482
Cédric VINCENTb9475272011-06-01 14:36:38 +02002483 /* No "useful" symbol. */
2484 if (nsyms == 0) {
2485 goto give_up;
2486 }
2487
Richard Henderson5d5c9932010-07-29 09:37:01 -07002488 /* Attempt to free the storage associated with the local symbols
2489 that we threw away. Whether or not this has any effect on the
2490 memory allocation depends on the malloc implementation and how
2491 many symbols we managed to discard. */
Peter Maydell0ef9ea22016-07-12 13:02:18 +01002492 new_syms = g_try_renew(struct elf_sym, syms, nsyms);
Stefan Weil8d79de62011-01-17 21:36:06 +01002493 if (new_syms == NULL) {
Cédric VINCENTb9475272011-06-01 14:36:38 +02002494 goto give_up;
Richard Henderson5d5c9932010-07-29 09:37:01 -07002495 }
Stefan Weil8d79de62011-01-17 21:36:06 +01002496 syms = new_syms;
Richard Henderson5d5c9932010-07-29 09:37:01 -07002497
pbrook49918a72008-10-22 15:11:31 +00002498 qsort(syms, nsyms, sizeof(*syms), symcmp);
2499
pbrook49918a72008-10-22 15:11:31 +00002500 s->disas_num_syms = nsyms;
2501#if ELF_CLASS == ELFCLASS32
2502 s->disas_symtab.elf32 = syms;
pbrook49918a72008-10-22 15:11:31 +00002503#else
2504 s->disas_symtab.elf64 = syms;
pbrook49918a72008-10-22 15:11:31 +00002505#endif
Richard Henderson682674b2010-07-27 10:25:33 -07002506 s->lookup_symbol = lookup_symbolxx;
bellarde80cfcf2004-12-19 23:18:01 +00002507 s->next = syminfos;
2508 syminfos = s;
Cédric VINCENTb9475272011-06-01 14:36:38 +02002509
2510 return;
2511
2512give_up:
Peter Maydell0ef9ea22016-07-12 13:02:18 +01002513 g_free(s);
2514 g_free(strings);
2515 g_free(syms);
bellard689f9362003-04-29 20:40:07 +00002516}
bellard31e31b82003-02-18 22:55:36 +00002517
YunQiang Su768fe762018-02-20 18:33:05 +01002518uint32_t get_elf_eflags(int fd)
2519{
2520 struct elfhdr ehdr;
2521 off_t offset;
2522 int ret;
2523
2524 /* Read ELF header */
2525 offset = lseek(fd, 0, SEEK_SET);
2526 if (offset == (off_t) -1) {
2527 return 0;
2528 }
2529 ret = read(fd, &ehdr, sizeof(ehdr));
2530 if (ret < sizeof(ehdr)) {
2531 return 0;
2532 }
2533 offset = lseek(fd, offset, SEEK_SET);
2534 if (offset == (off_t) -1) {
2535 return 0;
2536 }
2537
2538 /* Check ELF signature */
2539 if (!elf_check_ident(&ehdr)) {
2540 return 0;
2541 }
2542
2543 /* check header */
2544 bswap_ehdr(&ehdr);
2545 if (!elf_check_ehdr(&ehdr)) {
2546 return 0;
2547 }
2548
2549 /* return architecture id */
2550 return ehdr.e_flags;
2551}
2552
Will Newtonf0116c52014-01-09 09:10:50 +00002553int load_elf_binary(struct linux_binprm *bprm, struct image_info *info)
bellard31e31b82003-02-18 22:55:36 +00002554{
Richard Henderson8e62a712010-07-27 10:25:37 -07002555 struct image_info interp_info;
bellard31e31b82003-02-18 22:55:36 +00002556 struct elfhdr elf_ex;
Richard Henderson8e62a712010-07-27 10:25:37 -07002557 char *elf_interpreter = NULL;
Stefan Brüns59baae92015-09-02 03:38:53 +02002558 char *scratch;
bellard31e31b82003-02-18 22:55:36 +00002559
Richard Hendersonbf858892010-07-27 10:25:38 -07002560 info->start_mmap = (abi_ulong)ELF_START_MMAP;
bellard31e31b82003-02-18 22:55:36 +00002561
Richard Hendersonbf858892010-07-27 10:25:38 -07002562 load_elf_image(bprm->filename, bprm->fd, info,
2563 &elf_interpreter, bprm->buf);
2564
2565 /* ??? We need a copy of the elf header for passing to create_elf_tables.
2566 If we do nothing, we'll have overwritten this when we re-use bprm->buf
2567 when we load the interpreter. */
2568 elf_ex = *(struct elfhdr *)bprm->buf;
bellard31e31b82003-02-18 22:55:36 +00002569
Stefan Brüns59baae92015-09-02 03:38:53 +02002570 /* Do this so that we can load the interpreter, if need be. We will
2571 change some of these later */
2572 bprm->p = setup_arg_pages(bprm, info);
2573
2574 scratch = g_new0(char, TARGET_PAGE_SIZE);
Richard Henderson7c4ee5b2016-12-15 09:38:11 -08002575 if (STACK_GROWS_DOWN) {
2576 bprm->p = copy_elf_strings(1, &bprm->filename, scratch,
2577 bprm->p, info->stack_limit);
2578 info->file_string = bprm->p;
2579 bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch,
2580 bprm->p, info->stack_limit);
2581 info->env_strings = bprm->p;
2582 bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch,
2583 bprm->p, info->stack_limit);
2584 info->arg_strings = bprm->p;
2585 } else {
2586 info->arg_strings = bprm->p;
2587 bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch,
2588 bprm->p, info->stack_limit);
2589 info->env_strings = bprm->p;
2590 bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch,
2591 bprm->p, info->stack_limit);
2592 info->file_string = bprm->p;
2593 bprm->p = copy_elf_strings(1, &bprm->filename, scratch,
2594 bprm->p, info->stack_limit);
2595 }
2596
Stefan Brüns59baae92015-09-02 03:38:53 +02002597 g_free(scratch);
2598
pbrooke5fe0c52006-06-11 13:32:59 +00002599 if (!bprm->p) {
Richard Hendersonbf858892010-07-27 10:25:38 -07002600 fprintf(stderr, "%s: %s\n", bprm->filename, strerror(E2BIG));
2601 exit(-1);
pbrooke5fe0c52006-06-11 13:32:59 +00002602 }
2603
Richard Henderson8e62a712010-07-27 10:25:37 -07002604 if (elf_interpreter) {
2605 load_elf_interp(elf_interpreter, &interp_info, bprm->buf);
bellard31e31b82003-02-18 22:55:36 +00002606
Richard Henderson8e62a712010-07-27 10:25:37 -07002607 /* If the program interpreter is one of these two, then assume
2608 an iBCS2 image. Otherwise assume a native linux image. */
bellard31e31b82003-02-18 22:55:36 +00002609
Richard Henderson8e62a712010-07-27 10:25:37 -07002610 if (strcmp(elf_interpreter, "/usr/lib/libc.so.1") == 0
2611 || strcmp(elf_interpreter, "/usr/lib/ld.so.1") == 0) {
2612 info->personality = PER_SVR4;
2613
2614 /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
2615 and some applications "depend" upon this behavior. Since
2616 we do not have the power to recompile these, we emulate
2617 the SVr4 behavior. Sigh. */
2618 target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
Peter Maydell68754b42016-07-12 13:02:12 +01002619 MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
Richard Henderson8e62a712010-07-27 10:25:37 -07002620 }
bellard31e31b82003-02-18 22:55:36 +00002621 }
2622
Richard Henderson8e62a712010-07-27 10:25:37 -07002623 bprm->p = create_elf_tables(bprm->p, bprm->argc, bprm->envc, &elf_ex,
2624 info, (elf_interpreter ? &interp_info : NULL));
2625 info->start_stack = bprm->p;
2626
2627 /* If we have an interpreter, set that as the program's entry point.
Richard Henderson8e780642011-10-26 09:59:17 -07002628 Copy the load_bias as well, to help PPC64 interpret the entry
Richard Henderson8e62a712010-07-27 10:25:37 -07002629 point as a function descriptor. Do this after creating elf tables
2630 so that we copy the original program entry point into the AUXV. */
2631 if (elf_interpreter) {
Richard Henderson8e780642011-10-26 09:59:17 -07002632 info->load_bias = interp_info.load_bias;
Richard Henderson8e62a712010-07-27 10:25:37 -07002633 info->entry = interp_info.entry;
Richard Hendersonbf858892010-07-27 10:25:38 -07002634 free(elf_interpreter);
Richard Henderson8e62a712010-07-27 10:25:37 -07002635 }
bellard31e31b82003-02-18 22:55:36 +00002636
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002637#ifdef USE_ELF_CORE_DUMP
2638 bprm->core_dump = &elf_core_dump;
2639#endif
2640
bellard31e31b82003-02-18 22:55:36 +00002641 return 0;
2642}
2643
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002644#ifdef USE_ELF_CORE_DUMP
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002645/*
2646 * Definitions to generate Intel SVR4-like core files.
Laurent Desnoguesa2547a12009-07-17 13:33:41 +01002647 * These mostly have the same names as the SVR4 types with "target_elf_"
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002648 * tacked on the front to prevent clashes with linux definitions,
2649 * and the typedef forms have been avoided. This is mostly like
2650 * the SVR4 structure, but more Linuxy, with things that Linux does
2651 * not support and which gdb doesn't really use excluded.
2652 *
2653 * Fields we don't dump (their contents is zero) in linux-user qemu
2654 * are marked with XXX.
2655 *
2656 * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
2657 *
2658 * Porting ELF coredump for target is (quite) simple process. First you
Nathan Froyddd0a3652009-12-11 09:04:45 -08002659 * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002660 * the target resides):
2661 *
2662 * #define USE_ELF_CORE_DUMP
2663 *
2664 * Next you define type of register set used for dumping. ELF specification
2665 * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
2666 *
Anthony Liguoric227f092009-10-01 16:12:16 -05002667 * typedef <target_regtype> target_elf_greg_t;
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002668 * #define ELF_NREG <number of registers>
Anthony Liguoric227f092009-10-01 16:12:16 -05002669 * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002670 *
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002671 * Last step is to implement target specific function that copies registers
2672 * from given cpu into just specified register set. Prototype is:
2673 *
Anthony Liguoric227f092009-10-01 16:12:16 -05002674 * static void elf_core_copy_regs(taret_elf_gregset_t *regs,
Andreas Färber9349b4f2012-03-14 01:38:32 +01002675 * const CPUArchState *env);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002676 *
2677 * Parameters:
2678 * regs - copy register values into here (allocated and zeroed by caller)
2679 * env - copy registers from here
2680 *
2681 * Example for ARM target is provided in this file.
2682 */
2683
2684/* An ELF note in memory */
2685struct memelfnote {
2686 const char *name;
2687 size_t namesz;
2688 size_t namesz_rounded;
2689 int type;
2690 size_t datasz;
Laurent Vivier80f5ce72011-02-13 23:37:35 +01002691 size_t datasz_rounded;
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002692 void *data;
2693 size_t notesz;
2694};
2695
Laurent Desnoguesa2547a12009-07-17 13:33:41 +01002696struct target_elf_siginfo {
Paolo Bonzinif8fd4fc2013-04-17 16:26:40 +02002697 abi_int si_signo; /* signal number */
2698 abi_int si_code; /* extra code */
2699 abi_int si_errno; /* errno */
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002700};
2701
Laurent Desnoguesa2547a12009-07-17 13:33:41 +01002702struct target_elf_prstatus {
2703 struct target_elf_siginfo pr_info; /* Info associated with signal */
Paolo Bonzini1ddd5922013-04-17 16:26:39 +02002704 abi_short pr_cursig; /* Current signal */
Paolo Bonzinica98ac82013-04-17 16:26:36 +02002705 abi_ulong pr_sigpend; /* XXX */
2706 abi_ulong pr_sighold; /* XXX */
Anthony Liguoric227f092009-10-01 16:12:16 -05002707 target_pid_t pr_pid;
2708 target_pid_t pr_ppid;
2709 target_pid_t pr_pgrp;
2710 target_pid_t pr_sid;
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002711 struct target_timeval pr_utime; /* XXX User time */
2712 struct target_timeval pr_stime; /* XXX System time */
2713 struct target_timeval pr_cutime; /* XXX Cumulative user time */
2714 struct target_timeval pr_cstime; /* XXX Cumulative system time */
Anthony Liguoric227f092009-10-01 16:12:16 -05002715 target_elf_gregset_t pr_reg; /* GP registers */
Paolo Bonzinif8fd4fc2013-04-17 16:26:40 +02002716 abi_int pr_fpvalid; /* XXX */
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002717};
2718
2719#define ELF_PRARGSZ (80) /* Number of chars for args */
2720
Laurent Desnoguesa2547a12009-07-17 13:33:41 +01002721struct target_elf_prpsinfo {
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002722 char pr_state; /* numeric process state */
2723 char pr_sname; /* char for pr_state */
2724 char pr_zomb; /* zombie */
2725 char pr_nice; /* nice val */
Paolo Bonzinica98ac82013-04-17 16:26:36 +02002726 abi_ulong pr_flag; /* flags */
Anthony Liguoric227f092009-10-01 16:12:16 -05002727 target_uid_t pr_uid;
2728 target_gid_t pr_gid;
2729 target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002730 /* Lots missing */
2731 char pr_fname[16]; /* filename of executable */
2732 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
2733};
2734
2735/* Here is the structure in which status of each thread is captured. */
2736struct elf_thread_status {
Blue Swirl72cf2d42009-09-12 07:36:22 +00002737 QTAILQ_ENTRY(elf_thread_status) ets_link;
Laurent Desnoguesa2547a12009-07-17 13:33:41 +01002738 struct target_elf_prstatus prstatus; /* NT_PRSTATUS */
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002739#if 0
2740 elf_fpregset_t fpu; /* NT_PRFPREG */
2741 struct task_struct *thread;
2742 elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
2743#endif
2744 struct memelfnote notes[1];
2745 int num_notes;
2746};
2747
2748struct elf_note_info {
2749 struct memelfnote *notes;
Laurent Desnoguesa2547a12009-07-17 13:33:41 +01002750 struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */
2751 struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002752
Blue Swirl72cf2d42009-09-12 07:36:22 +00002753 QTAILQ_HEAD(thread_list_head, elf_thread_status) thread_list;
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002754#if 0
2755 /*
2756 * Current version of ELF coredump doesn't support
2757 * dumping fp regs etc.
2758 */
2759 elf_fpregset_t *fpu;
2760 elf_fpxregset_t *xfpu;
2761 int thread_status_size;
2762#endif
2763 int notes_size;
2764 int numnote;
2765};
2766
2767struct vm_area_struct {
Mikhail Ilyin1a1c4db2014-09-08 17:28:56 +04002768 target_ulong vma_start; /* start vaddr of memory region */
2769 target_ulong vma_end; /* end vaddr of memory region */
2770 abi_ulong vma_flags; /* protection etc. flags for the region */
Blue Swirl72cf2d42009-09-12 07:36:22 +00002771 QTAILQ_ENTRY(vm_area_struct) vma_link;
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002772};
2773
2774struct mm_struct {
Blue Swirl72cf2d42009-09-12 07:36:22 +00002775 QTAILQ_HEAD(, vm_area_struct) mm_mmap;
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002776 int mm_count; /* number of mappings */
2777};
2778
2779static struct mm_struct *vma_init(void);
2780static void vma_delete(struct mm_struct *);
Mikhail Ilyin1a1c4db2014-09-08 17:28:56 +04002781static int vma_add_mapping(struct mm_struct *, target_ulong,
2782 target_ulong, abi_ulong);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002783static int vma_get_mapping_count(const struct mm_struct *);
2784static struct vm_area_struct *vma_first(const struct mm_struct *);
2785static struct vm_area_struct *vma_next(struct vm_area_struct *);
2786static abi_ulong vma_dump_size(const struct vm_area_struct *);
Mikhail Ilyin1a1c4db2014-09-08 17:28:56 +04002787static int vma_walker(void *priv, target_ulong start, target_ulong end,
Richard Hendersond97ef722010-07-27 10:25:29 -07002788 unsigned long flags);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002789
2790static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t);
2791static void fill_note(struct memelfnote *, const char *, int,
Richard Hendersond97ef722010-07-27 10:25:29 -07002792 unsigned int, void *);
Laurent Desnoguesa2547a12009-07-17 13:33:41 +01002793static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int);
2794static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002795static void fill_auxv_note(struct memelfnote *, const TaskState *);
2796static void fill_elf_note_phdr(struct elf_phdr *, int, off_t);
2797static size_t note_size(const struct memelfnote *);
2798static void free_note_info(struct elf_note_info *);
Andreas Färber9349b4f2012-03-14 01:38:32 +01002799static int fill_note_info(struct elf_note_info *, long, const CPUArchState *);
2800static void fill_thread_info(struct elf_note_info *, const CPUArchState *);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002801static int core_dump_filename(const TaskState *, char *, size_t);
2802
2803static int dump_write(int, const void *, size_t);
2804static int write_note(struct memelfnote *, int);
2805static int write_note_info(struct elf_note_info *, int);
2806
2807#ifdef BSWAP_NEEDED
Laurent Desnoguesa2547a12009-07-17 13:33:41 +01002808static void bswap_prstatus(struct target_elf_prstatus *prstatus)
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002809{
Paolo Bonzinica98ac82013-04-17 16:26:36 +02002810 prstatus->pr_info.si_signo = tswap32(prstatus->pr_info.si_signo);
2811 prstatus->pr_info.si_code = tswap32(prstatus->pr_info.si_code);
2812 prstatus->pr_info.si_errno = tswap32(prstatus->pr_info.si_errno);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002813 prstatus->pr_cursig = tswap16(prstatus->pr_cursig);
Paolo Bonzinica98ac82013-04-17 16:26:36 +02002814 prstatus->pr_sigpend = tswapal(prstatus->pr_sigpend);
2815 prstatus->pr_sighold = tswapal(prstatus->pr_sighold);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002816 prstatus->pr_pid = tswap32(prstatus->pr_pid);
2817 prstatus->pr_ppid = tswap32(prstatus->pr_ppid);
2818 prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp);
2819 prstatus->pr_sid = tswap32(prstatus->pr_sid);
2820 /* cpu times are not filled, so we skip them */
2821 /* regs should be in correct format already */
2822 prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid);
2823}
2824
Laurent Desnoguesa2547a12009-07-17 13:33:41 +01002825static void bswap_psinfo(struct target_elf_prpsinfo *psinfo)
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002826{
Paolo Bonzinica98ac82013-04-17 16:26:36 +02002827 psinfo->pr_flag = tswapal(psinfo->pr_flag);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002828 psinfo->pr_uid = tswap16(psinfo->pr_uid);
2829 psinfo->pr_gid = tswap16(psinfo->pr_gid);
2830 psinfo->pr_pid = tswap32(psinfo->pr_pid);
2831 psinfo->pr_ppid = tswap32(psinfo->pr_ppid);
2832 psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp);
2833 psinfo->pr_sid = tswap32(psinfo->pr_sid);
2834}
Richard Henderson991f8f02010-07-27 10:25:32 -07002835
2836static void bswap_note(struct elf_note *en)
2837{
2838 bswap32s(&en->n_namesz);
2839 bswap32s(&en->n_descsz);
2840 bswap32s(&en->n_type);
2841}
2842#else
2843static inline void bswap_prstatus(struct target_elf_prstatus *p) { }
2844static inline void bswap_psinfo(struct target_elf_prpsinfo *p) {}
2845static inline void bswap_note(struct elf_note *en) { }
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002846#endif /* BSWAP_NEEDED */
2847
2848/*
2849 * Minimal support for linux memory regions. These are needed
2850 * when we are finding out what memory exactly belongs to
2851 * emulated process. No locks needed here, as long as
2852 * thread that received the signal is stopped.
2853 */
2854
2855static struct mm_struct *vma_init(void)
2856{
2857 struct mm_struct *mm;
2858
Anthony Liguori7267c092011-08-20 22:09:37 -05002859 if ((mm = g_malloc(sizeof (*mm))) == NULL)
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002860 return (NULL);
2861
2862 mm->mm_count = 0;
Blue Swirl72cf2d42009-09-12 07:36:22 +00002863 QTAILQ_INIT(&mm->mm_mmap);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002864
2865 return (mm);
2866}
2867
2868static void vma_delete(struct mm_struct *mm)
2869{
2870 struct vm_area_struct *vma;
2871
2872 while ((vma = vma_first(mm)) != NULL) {
Blue Swirl72cf2d42009-09-12 07:36:22 +00002873 QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link);
Anthony Liguori7267c092011-08-20 22:09:37 -05002874 g_free(vma);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002875 }
Anthony Liguori7267c092011-08-20 22:09:37 -05002876 g_free(mm);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002877}
2878
Mikhail Ilyin1a1c4db2014-09-08 17:28:56 +04002879static int vma_add_mapping(struct mm_struct *mm, target_ulong start,
2880 target_ulong end, abi_ulong flags)
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002881{
2882 struct vm_area_struct *vma;
2883
Anthony Liguori7267c092011-08-20 22:09:37 -05002884 if ((vma = g_malloc0(sizeof (*vma))) == NULL)
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002885 return (-1);
2886
2887 vma->vma_start = start;
2888 vma->vma_end = end;
2889 vma->vma_flags = flags;
2890
Blue Swirl72cf2d42009-09-12 07:36:22 +00002891 QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002892 mm->mm_count++;
2893
2894 return (0);
2895}
2896
2897static struct vm_area_struct *vma_first(const struct mm_struct *mm)
2898{
Blue Swirl72cf2d42009-09-12 07:36:22 +00002899 return (QTAILQ_FIRST(&mm->mm_mmap));
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002900}
2901
2902static struct vm_area_struct *vma_next(struct vm_area_struct *vma)
2903{
Blue Swirl72cf2d42009-09-12 07:36:22 +00002904 return (QTAILQ_NEXT(vma, vma_link));
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002905}
2906
2907static int vma_get_mapping_count(const struct mm_struct *mm)
2908{
2909 return (mm->mm_count);
2910}
2911
2912/*
2913 * Calculate file (dump) size of given memory region.
2914 */
2915static abi_ulong vma_dump_size(const struct vm_area_struct *vma)
2916{
2917 /* if we cannot even read the first page, skip it */
2918 if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE))
2919 return (0);
2920
2921 /*
2922 * Usually we don't dump executable pages as they contain
2923 * non-writable code that debugger can read directly from
2924 * target library etc. However, thread stacks are marked
2925 * also executable so we read in first page of given region
2926 * and check whether it contains elf header. If there is
2927 * no elf header, we dump it.
2928 */
2929 if (vma->vma_flags & PROT_EXEC) {
2930 char page[TARGET_PAGE_SIZE];
2931
2932 copy_from_user(page, vma->vma_start, sizeof (page));
2933 if ((page[EI_MAG0] == ELFMAG0) &&
2934 (page[EI_MAG1] == ELFMAG1) &&
2935 (page[EI_MAG2] == ELFMAG2) &&
2936 (page[EI_MAG3] == ELFMAG3)) {
2937 /*
2938 * Mappings are possibly from ELF binary. Don't dump
2939 * them.
2940 */
2941 return (0);
2942 }
2943 }
2944
2945 return (vma->vma_end - vma->vma_start);
2946}
2947
Mikhail Ilyin1a1c4db2014-09-08 17:28:56 +04002948static int vma_walker(void *priv, target_ulong start, target_ulong end,
Richard Hendersond97ef722010-07-27 10:25:29 -07002949 unsigned long flags)
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002950{
2951 struct mm_struct *mm = (struct mm_struct *)priv;
2952
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002953 vma_add_mapping(mm, start, end, flags);
2954 return (0);
2955}
2956
2957static void fill_note(struct memelfnote *note, const char *name, int type,
Richard Hendersond97ef722010-07-27 10:25:29 -07002958 unsigned int sz, void *data)
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002959{
2960 unsigned int namesz;
2961
2962 namesz = strlen(name) + 1;
2963 note->name = name;
2964 note->namesz = namesz;
2965 note->namesz_rounded = roundup(namesz, sizeof (int32_t));
2966 note->type = type;
Laurent Vivier80f5ce72011-02-13 23:37:35 +01002967 note->datasz = sz;
2968 note->datasz_rounded = roundup(sz, sizeof (int32_t));
2969
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002970 note->data = data;
2971
2972 /*
2973 * We calculate rounded up note size here as specified by
2974 * ELF document.
2975 */
2976 note->notesz = sizeof (struct elf_note) +
Laurent Vivier80f5ce72011-02-13 23:37:35 +01002977 note->namesz_rounded + note->datasz_rounded;
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002978}
2979
2980static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine,
Richard Hendersond97ef722010-07-27 10:25:29 -07002981 uint32_t flags)
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03002982{
2983 (void) memset(elf, 0, sizeof(*elf));
2984
2985 (void) memcpy(elf->e_ident, ELFMAG, SELFMAG);
2986 elf->e_ident[EI_CLASS] = ELF_CLASS;
2987 elf->e_ident[EI_DATA] = ELF_DATA;
2988 elf->e_ident[EI_VERSION] = EV_CURRENT;
2989 elf->e_ident[EI_OSABI] = ELF_OSABI;
2990
2991 elf->e_type = ET_CORE;
2992 elf->e_machine = machine;
2993 elf->e_version = EV_CURRENT;
2994 elf->e_phoff = sizeof(struct elfhdr);
2995 elf->e_flags = flags;
2996 elf->e_ehsize = sizeof(struct elfhdr);
2997 elf->e_phentsize = sizeof(struct elf_phdr);
2998 elf->e_phnum = segs;
2999
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003000 bswap_ehdr(elf);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003001}
3002
3003static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset)
3004{
3005 phdr->p_type = PT_NOTE;
3006 phdr->p_offset = offset;
3007 phdr->p_vaddr = 0;
3008 phdr->p_paddr = 0;
3009 phdr->p_filesz = sz;
3010 phdr->p_memsz = 0;
3011 phdr->p_flags = 0;
3012 phdr->p_align = 0;
3013
Richard Henderson991f8f02010-07-27 10:25:32 -07003014 bswap_phdr(phdr, 1);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003015}
3016
3017static size_t note_size(const struct memelfnote *note)
3018{
3019 return (note->notesz);
3020}
3021
Laurent Desnoguesa2547a12009-07-17 13:33:41 +01003022static void fill_prstatus(struct target_elf_prstatus *prstatus,
Richard Hendersond97ef722010-07-27 10:25:29 -07003023 const TaskState *ts, int signr)
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003024{
3025 (void) memset(prstatus, 0, sizeof (*prstatus));
3026 prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
3027 prstatus->pr_pid = ts->ts_tid;
3028 prstatus->pr_ppid = getppid();
3029 prstatus->pr_pgrp = getpgrp();
3030 prstatus->pr_sid = getsid(0);
3031
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003032 bswap_prstatus(prstatus);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003033}
3034
Laurent Desnoguesa2547a12009-07-17 13:33:41 +01003035static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts)
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003036{
Jim Meyering900cfbc2012-10-04 13:09:53 +02003037 char *base_filename;
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003038 unsigned int i, len;
3039
3040 (void) memset(psinfo, 0, sizeof (*psinfo));
3041
3042 len = ts->info->arg_end - ts->info->arg_start;
3043 if (len >= ELF_PRARGSZ)
3044 len = ELF_PRARGSZ - 1;
3045 if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len))
3046 return -EFAULT;
3047 for (i = 0; i < len; i++)
3048 if (psinfo->pr_psargs[i] == 0)
3049 psinfo->pr_psargs[i] = ' ';
3050 psinfo->pr_psargs[len] = 0;
3051
3052 psinfo->pr_pid = getpid();
3053 psinfo->pr_ppid = getppid();
3054 psinfo->pr_pgrp = getpgrp();
3055 psinfo->pr_sid = getsid(0);
3056 psinfo->pr_uid = getuid();
3057 psinfo->pr_gid = getgid();
3058
Jim Meyering900cfbc2012-10-04 13:09:53 +02003059 base_filename = g_path_get_basename(ts->bprm->filename);
3060 /*
3061 * Using strncpy here is fine: at max-length,
3062 * this field is not NUL-terminated.
3063 */
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003064 (void) strncpy(psinfo->pr_fname, base_filename,
Richard Hendersond97ef722010-07-27 10:25:29 -07003065 sizeof(psinfo->pr_fname));
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003066
Jim Meyering900cfbc2012-10-04 13:09:53 +02003067 g_free(base_filename);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003068 bswap_psinfo(psinfo);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003069 return (0);
3070}
3071
3072static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
3073{
3074 elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv;
3075 elf_addr_t orig_auxv = auxv;
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003076 void *ptr;
Alexander Graf125b0f52012-01-28 21:12:14 +02003077 int len = ts->info->auxv_len;
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003078
3079 /*
3080 * Auxiliary vector is stored in target process stack. It contains
3081 * {type, value} pairs that we need to dump into note. This is not
3082 * strictly necessary but we do it here for sake of completeness.
3083 */
3084
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003085 /* read in whole auxv vector and copy it to memelfnote */
3086 ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
3087 if (ptr != NULL) {
3088 fill_note(note, "CORE", NT_AUXV, len, ptr);
3089 unlock_user(ptr, auxv, len);
3090 }
3091}
3092
3093/*
3094 * Constructs name of coredump file. We have following convention
3095 * for the name:
3096 * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
3097 *
3098 * Returns 0 in case of success, -1 otherwise (errno is set).
3099 */
3100static int core_dump_filename(const TaskState *ts, char *buf,
Richard Hendersond97ef722010-07-27 10:25:29 -07003101 size_t bufsize)
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003102{
3103 char timestamp[64];
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003104 char *base_filename = NULL;
3105 struct timeval tv;
3106 struct tm tm;
3107
3108 assert(bufsize >= PATH_MAX);
3109
3110 if (gettimeofday(&tv, NULL) < 0) {
3111 (void) fprintf(stderr, "unable to get current timestamp: %s",
Richard Hendersond97ef722010-07-27 10:25:29 -07003112 strerror(errno));
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003113 return (-1);
3114 }
3115
Wei Jiangangb8da57f2016-04-07 10:46:23 +08003116 base_filename = g_path_get_basename(ts->bprm->filename);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003117 (void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S",
Richard Hendersond97ef722010-07-27 10:25:29 -07003118 localtime_r(&tv.tv_sec, &tm));
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003119 (void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core",
Richard Hendersond97ef722010-07-27 10:25:29 -07003120 base_filename, timestamp, (int)getpid());
Wei Jiangangb8da57f2016-04-07 10:46:23 +08003121 g_free(base_filename);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003122
3123 return (0);
3124}
3125
3126static int dump_write(int fd, const void *ptr, size_t size)
3127{
3128 const char *bufp = (const char *)ptr;
3129 ssize_t bytes_written, bytes_left;
3130 struct rlimit dumpsize;
3131 off_t pos;
3132
3133 bytes_written = 0;
3134 getrlimit(RLIMIT_CORE, &dumpsize);
3135 if ((pos = lseek(fd, 0, SEEK_CUR))==-1) {
3136 if (errno == ESPIPE) { /* not a seekable stream */
3137 bytes_left = size;
3138 } else {
3139 return pos;
3140 }
3141 } else {
3142 if (dumpsize.rlim_cur <= pos) {
3143 return -1;
3144 } else if (dumpsize.rlim_cur == RLIM_INFINITY) {
3145 bytes_left = size;
3146 } else {
3147 size_t limit_left=dumpsize.rlim_cur - pos;
3148 bytes_left = limit_left >= size ? size : limit_left ;
3149 }
3150 }
3151
3152 /*
3153 * In normal conditions, single write(2) should do but
3154 * in case of socket etc. this mechanism is more portable.
3155 */
3156 do {
3157 bytes_written = write(fd, bufp, bytes_left);
3158 if (bytes_written < 0) {
3159 if (errno == EINTR)
3160 continue;
3161 return (-1);
3162 } else if (bytes_written == 0) { /* eof */
3163 return (-1);
3164 }
3165 bufp += bytes_written;
3166 bytes_left -= bytes_written;
3167 } while (bytes_left > 0);
3168
3169 return (0);
3170}
3171
3172static int write_note(struct memelfnote *men, int fd)
3173{
3174 struct elf_note en;
3175
3176 en.n_namesz = men->namesz;
3177 en.n_type = men->type;
3178 en.n_descsz = men->datasz;
3179
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003180 bswap_note(&en);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003181
3182 if (dump_write(fd, &en, sizeof(en)) != 0)
3183 return (-1);
3184 if (dump_write(fd, men->name, men->namesz_rounded) != 0)
3185 return (-1);
Laurent Vivier80f5ce72011-02-13 23:37:35 +01003186 if (dump_write(fd, men->data, men->datasz_rounded) != 0)
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003187 return (-1);
3188
3189 return (0);
3190}
3191
Andreas Färber9349b4f2012-03-14 01:38:32 +01003192static void fill_thread_info(struct elf_note_info *info, const CPUArchState *env)
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003193{
Andreas Färber0429a972013-08-26 18:14:44 +02003194 CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3195 TaskState *ts = (TaskState *)cpu->opaque;
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003196 struct elf_thread_status *ets;
3197
Anthony Liguori7267c092011-08-20 22:09:37 -05003198 ets = g_malloc0(sizeof (*ets));
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003199 ets->num_notes = 1; /* only prstatus is dumped */
3200 fill_prstatus(&ets->prstatus, ts, 0);
3201 elf_core_copy_regs(&ets->prstatus.pr_reg, env);
3202 fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus),
Richard Hendersond97ef722010-07-27 10:25:29 -07003203 &ets->prstatus);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003204
Blue Swirl72cf2d42009-09-12 07:36:22 +00003205 QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003206
3207 info->notes_size += note_size(&ets->notes[0]);
3208}
3209
Peter Maydell6afafa82014-02-17 18:55:31 +00003210static void init_note_info(struct elf_note_info *info)
3211{
3212 /* Initialize the elf_note_info structure so that it is at
3213 * least safe to call free_note_info() on it. Must be
3214 * called before calling fill_note_info().
3215 */
3216 memset(info, 0, sizeof (*info));
3217 QTAILQ_INIT(&info->thread_list);
3218}
3219
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003220static int fill_note_info(struct elf_note_info *info,
Andreas Färber9349b4f2012-03-14 01:38:32 +01003221 long signr, const CPUArchState *env)
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003222{
3223#define NUMNOTES 3
Andreas Färber0429a972013-08-26 18:14:44 +02003224 CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3225 TaskState *ts = (TaskState *)cpu->opaque;
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003226 int i;
3227
Markus Armbrusterc78d65e2015-09-14 13:53:03 +02003228 info->notes = g_new0(struct memelfnote, NUMNOTES);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003229 if (info->notes == NULL)
3230 return (-ENOMEM);
Anthony Liguori7267c092011-08-20 22:09:37 -05003231 info->prstatus = g_malloc0(sizeof (*info->prstatus));
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003232 if (info->prstatus == NULL)
3233 return (-ENOMEM);
Anthony Liguori7267c092011-08-20 22:09:37 -05003234 info->psinfo = g_malloc0(sizeof (*info->psinfo));
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003235 if (info->prstatus == NULL)
3236 return (-ENOMEM);
3237
3238 /*
3239 * First fill in status (and registers) of current thread
3240 * including process info & aux vector.
3241 */
3242 fill_prstatus(info->prstatus, ts, signr);
3243 elf_core_copy_regs(&info->prstatus->pr_reg, env);
3244 fill_note(&info->notes[0], "CORE", NT_PRSTATUS,
Richard Hendersond97ef722010-07-27 10:25:29 -07003245 sizeof (*info->prstatus), info->prstatus);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003246 fill_psinfo(info->psinfo, ts);
3247 fill_note(&info->notes[1], "CORE", NT_PRPSINFO,
Richard Hendersond97ef722010-07-27 10:25:29 -07003248 sizeof (*info->psinfo), info->psinfo);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003249 fill_auxv_note(&info->notes[2], ts);
3250 info->numnote = 3;
3251
3252 info->notes_size = 0;
3253 for (i = 0; i < info->numnote; i++)
3254 info->notes_size += note_size(&info->notes[i]);
3255
3256 /* read and fill status of all threads */
3257 cpu_list_lock();
Andreas Färberbdc44642013-06-24 23:50:24 +02003258 CPU_FOREACH(cpu) {
Andreas Färbera2247f82013-06-09 19:47:04 +02003259 if (cpu == thread_cpu) {
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003260 continue;
Andreas Färber182735e2013-05-29 22:29:20 +02003261 }
3262 fill_thread_info(info, (CPUArchState *)cpu->env_ptr);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003263 }
3264 cpu_list_unlock();
3265
3266 return (0);
3267}
3268
3269static void free_note_info(struct elf_note_info *info)
3270{
3271 struct elf_thread_status *ets;
3272
Blue Swirl72cf2d42009-09-12 07:36:22 +00003273 while (!QTAILQ_EMPTY(&info->thread_list)) {
3274 ets = QTAILQ_FIRST(&info->thread_list);
3275 QTAILQ_REMOVE(&info->thread_list, ets, ets_link);
Anthony Liguori7267c092011-08-20 22:09:37 -05003276 g_free(ets);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003277 }
3278
Anthony Liguori7267c092011-08-20 22:09:37 -05003279 g_free(info->prstatus);
3280 g_free(info->psinfo);
3281 g_free(info->notes);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003282}
3283
3284static int write_note_info(struct elf_note_info *info, int fd)
3285{
3286 struct elf_thread_status *ets;
3287 int i, error = 0;
3288
3289 /* write prstatus, psinfo and auxv for current thread */
3290 for (i = 0; i < info->numnote; i++)
3291 if ((error = write_note(&info->notes[i], fd)) != 0)
3292 return (error);
3293
3294 /* write prstatus for each thread */
Emilio G. Cota52a53af2015-04-27 12:45:33 -04003295 QTAILQ_FOREACH(ets, &info->thread_list, ets_link) {
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003296 if ((error = write_note(&ets->notes[0], fd)) != 0)
3297 return (error);
3298 }
3299
3300 return (0);
3301}
3302
3303/*
3304 * Write out ELF coredump.
3305 *
3306 * See documentation of ELF object file format in:
3307 * http://www.caldera.com/developers/devspecs/gabi41.pdf
3308 *
3309 * Coredump format in linux is following:
3310 *
3311 * 0 +----------------------+ \
3312 * | ELF header | ET_CORE |
3313 * +----------------------+ |
3314 * | ELF program headers | |--- headers
3315 * | - NOTE section | |
3316 * | - PT_LOAD sections | |
3317 * +----------------------+ /
3318 * | NOTEs: |
3319 * | - NT_PRSTATUS |
3320 * | - NT_PRSINFO |
3321 * | - NT_AUXV |
3322 * +----------------------+ <-- aligned to target page
3323 * | Process memory dump |
3324 * : :
3325 * . .
3326 * : :
3327 * | |
3328 * +----------------------+
3329 *
3330 * NT_PRSTATUS -> struct elf_prstatus (per thread)
3331 * NT_PRSINFO -> struct elf_prpsinfo
3332 * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
3333 *
3334 * Format follows System V format as close as possible. Current
3335 * version limitations are as follows:
3336 * - no floating point registers are dumped
3337 *
3338 * Function returns 0 in case of success, negative errno otherwise.
3339 *
3340 * TODO: make this work also during runtime: it should be
3341 * possible to force coredump from running process and then
3342 * continue processing. For example qemu could set up SIGUSR2
3343 * handler (provided that target process haven't registered
3344 * handler for that) that does the dump when signal is received.
3345 */
Andreas Färber9349b4f2012-03-14 01:38:32 +01003346static int elf_core_dump(int signr, const CPUArchState *env)
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003347{
Andreas Färber0429a972013-08-26 18:14:44 +02003348 const CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
3349 const TaskState *ts = (const TaskState *)cpu->opaque;
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003350 struct vm_area_struct *vma = NULL;
3351 char corefile[PATH_MAX];
3352 struct elf_note_info info;
3353 struct elfhdr elf;
3354 struct elf_phdr phdr;
3355 struct rlimit dumpsize;
3356 struct mm_struct *mm = NULL;
3357 off_t offset = 0, data_offset = 0;
3358 int segs = 0;
3359 int fd = -1;
3360
Peter Maydell6afafa82014-02-17 18:55:31 +00003361 init_note_info(&info);
3362
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003363 errno = 0;
3364 getrlimit(RLIMIT_CORE, &dumpsize);
3365 if (dumpsize.rlim_cur == 0)
Richard Hendersond97ef722010-07-27 10:25:29 -07003366 return 0;
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003367
3368 if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0)
3369 return (-errno);
3370
3371 if ((fd = open(corefile, O_WRONLY | O_CREAT,
Richard Hendersond97ef722010-07-27 10:25:29 -07003372 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003373 return (-errno);
3374
3375 /*
3376 * Walk through target process memory mappings and
3377 * set up structure containing this information. After
3378 * this point vma_xxx functions can be used.
3379 */
3380 if ((mm = vma_init()) == NULL)
3381 goto out;
3382
3383 walk_memory_regions(mm, vma_walker);
3384 segs = vma_get_mapping_count(mm);
3385
3386 /*
3387 * Construct valid coredump ELF header. We also
3388 * add one more segment for notes.
3389 */
3390 fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0);
3391 if (dump_write(fd, &elf, sizeof (elf)) != 0)
3392 goto out;
3393
Daniel P. Berrangeb6af0972015-08-26 12:17:13 +01003394 /* fill in the in-memory version of notes */
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003395 if (fill_note_info(&info, signr, env) < 0)
3396 goto out;
3397
3398 offset += sizeof (elf); /* elf header */
3399 offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */
3400
3401 /* write out notes program header */
3402 fill_elf_note_phdr(&phdr, info.notes_size, offset);
3403
3404 offset += info.notes_size;
3405 if (dump_write(fd, &phdr, sizeof (phdr)) != 0)
3406 goto out;
3407
3408 /*
3409 * ELF specification wants data to start at page boundary so
3410 * we align it here.
3411 */
Laurent Vivier80f5ce72011-02-13 23:37:35 +01003412 data_offset = offset = roundup(offset, ELF_EXEC_PAGESIZE);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003413
3414 /*
3415 * Write program headers for memory regions mapped in
3416 * the target process.
3417 */
3418 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
3419 (void) memset(&phdr, 0, sizeof (phdr));
3420
3421 phdr.p_type = PT_LOAD;
3422 phdr.p_offset = offset;
3423 phdr.p_vaddr = vma->vma_start;
3424 phdr.p_paddr = 0;
3425 phdr.p_filesz = vma_dump_size(vma);
3426 offset += phdr.p_filesz;
3427 phdr.p_memsz = vma->vma_end - vma->vma_start;
3428 phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0;
3429 if (vma->vma_flags & PROT_WRITE)
3430 phdr.p_flags |= PF_W;
3431 if (vma->vma_flags & PROT_EXEC)
3432 phdr.p_flags |= PF_X;
3433 phdr.p_align = ELF_EXEC_PAGESIZE;
3434
Laurent Vivier80f5ce72011-02-13 23:37:35 +01003435 bswap_phdr(&phdr, 1);
Peter Maydell772034b2016-07-12 13:02:17 +01003436 if (dump_write(fd, &phdr, sizeof(phdr)) != 0) {
3437 goto out;
3438 }
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003439 }
3440
3441 /*
3442 * Next we write notes just after program headers. No
3443 * alignment needed here.
3444 */
3445 if (write_note_info(&info, fd) < 0)
3446 goto out;
3447
3448 /* align data to page boundary */
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003449 if (lseek(fd, data_offset, SEEK_SET) != data_offset)
3450 goto out;
3451
3452 /*
3453 * Finally we can dump process memory into corefile as well.
3454 */
3455 for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
3456 abi_ulong addr;
3457 abi_ulong end;
3458
3459 end = vma->vma_start + vma_dump_size(vma);
3460
3461 for (addr = vma->vma_start; addr < end;
Richard Hendersond97ef722010-07-27 10:25:29 -07003462 addr += TARGET_PAGE_SIZE) {
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003463 char page[TARGET_PAGE_SIZE];
3464 int error;
3465
3466 /*
3467 * Read in page from target process memory and
3468 * write it to coredump file.
3469 */
3470 error = copy_from_user(page, addr, sizeof (page));
3471 if (error != 0) {
Aurelien Jarno49995e12009-12-19 20:28:23 +01003472 (void) fprintf(stderr, "unable to dump " TARGET_ABI_FMT_lx "\n",
Richard Hendersond97ef722010-07-27 10:25:29 -07003473 addr);
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003474 errno = -error;
3475 goto out;
3476 }
3477 if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0)
3478 goto out;
3479 }
3480 }
3481
Richard Hendersond97ef722010-07-27 10:25:29 -07003482 out:
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003483 free_note_info(&info);
3484 if (mm != NULL)
3485 vma_delete(mm);
3486 (void) close(fd);
3487
3488 if (errno != 0)
3489 return (-errno);
3490 return (0);
3491}
Mika Westerbergedf8e2a2009-04-07 09:57:11 +03003492#endif /* USE_ELF_CORE_DUMP */
3493
pbrooke5fe0c52006-06-11 13:32:59 +00003494void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
3495{
3496 init_thread(regs, infop);
3497}