bellard | e88de09 | 2005-02-07 12:35:39 +0000 | [diff] [blame] | 1 | #ifndef QEMU_H |
| 2 | #define QEMU_H |
bellard | 31e31b8 | 2003-02-18 22:55:36 +0000 | [diff] [blame] | 3 | |
Timothy E Baldwin | 4d330ce | 2016-05-12 18:47:46 +0100 | [diff] [blame] | 4 | #include "hostdep.h" |
bellard | 6180a18 | 2003-09-30 21:04:53 +0000 | [diff] [blame] | 5 | #include "cpu.h" |
Paolo Bonzini | 63c9155 | 2016-03-15 13:18:37 +0100 | [diff] [blame] | 6 | #include "exec/exec-all.h" |
Paolo Bonzini | f08b617 | 2014-03-28 19:42:10 +0100 | [diff] [blame] | 7 | #include "exec/cpu_ldst.h" |
blueswir1 | 992f48a | 2007-10-14 16:27:31 +0000 | [diff] [blame] | 8 | |
balrog | 06177d3 | 2007-12-24 13:47:52 +0000 | [diff] [blame] | 9 | #undef DEBUG_REMAP |
| 10 | #ifdef DEBUG_REMAP |
balrog | 06177d3 | 2007-12-24 13:47:52 +0000 | [diff] [blame] | 11 | #endif /* DEBUG_REMAP */ |
| 12 | |
Paolo Bonzini | 022c62c | 2012-12-17 18:19:49 +0100 | [diff] [blame] | 13 | #include "exec/user/abitypes.h" |
blueswir1 | 992f48a | 2007-10-14 16:27:31 +0000 | [diff] [blame] | 14 | |
Paolo Bonzini | 022c62c | 2012-12-17 18:19:49 +0100 | [diff] [blame] | 15 | #include "exec/user/thunk.h" |
blueswir1 | 992f48a | 2007-10-14 16:27:31 +0000 | [diff] [blame] | 16 | #include "syscall_defs.h" |
Lluís Vilanova | 460c579 | 2016-02-01 19:38:42 +0100 | [diff] [blame] | 17 | #include "target_syscall.h" |
Paolo Bonzini | 022c62c | 2012-12-17 18:19:49 +0100 | [diff] [blame] | 18 | #include "exec/gdbstub.h" |
bellard | 66fb976 | 2003-03-23 01:06:05 +0000 | [diff] [blame] | 19 | |
Peter Maydell | 1d48fdd | 2016-06-14 12:49:18 +0100 | [diff] [blame] | 20 | /* This is the size of the host kernel's sigset_t, needed where we make |
| 21 | * direct system calls that take a sigset_t pointer and a size. |
| 22 | */ |
| 23 | #define SIGSET_T_SIZE (_NSIG / 8) |
| 24 | |
bellard | 31e31b8 | 2003-02-18 22:55:36 +0000 | [diff] [blame] | 25 | /* This struct is used to hold certain information about the image. |
| 26 | * Basically, it replicates in user space what would be certain |
| 27 | * task_struct fields in the kernel |
| 28 | */ |
| 29 | struct image_info { |
Richard Henderson | 9955ffa | 2010-07-27 10:25:30 -0700 | [diff] [blame] | 30 | abi_ulong load_bias; |
blueswir1 | 992f48a | 2007-10-14 16:27:31 +0000 | [diff] [blame] | 31 | abi_ulong load_addr; |
| 32 | abi_ulong start_code; |
| 33 | abi_ulong end_code; |
| 34 | abi_ulong start_data; |
| 35 | abi_ulong end_data; |
| 36 | abi_ulong start_brk; |
| 37 | abi_ulong brk; |
Richard Henderson | 6fd5944 | 2020-01-17 13:02:45 -1000 | [diff] [blame] | 38 | abi_ulong reserve_brk; |
blueswir1 | 992f48a | 2007-10-14 16:27:31 +0000 | [diff] [blame] | 39 | abi_ulong start_mmap; |
blueswir1 | 992f48a | 2007-10-14 16:27:31 +0000 | [diff] [blame] | 40 | abi_ulong start_stack; |
Paul Brook | 97374d3 | 2010-06-16 13:03:51 +0100 | [diff] [blame] | 41 | abi_ulong stack_limit; |
blueswir1 | 992f48a | 2007-10-14 16:27:31 +0000 | [diff] [blame] | 42 | abi_ulong entry; |
| 43 | abi_ulong code_offset; |
| 44 | abi_ulong data_offset; |
Mika Westerberg | edf8e2a | 2009-04-07 09:57:11 +0300 | [diff] [blame] | 45 | abi_ulong saved_auxv; |
Alexander Graf | 125b0f5 | 2012-01-28 21:12:14 +0200 | [diff] [blame] | 46 | abi_ulong auxv_len; |
Mika Westerberg | edf8e2a | 2009-04-07 09:57:11 +0300 | [diff] [blame] | 47 | abi_ulong arg_start; |
| 48 | abi_ulong arg_end; |
Richard Henderson | 7c4ee5b | 2016-12-15 09:38:11 -0800 | [diff] [blame] | 49 | abi_ulong arg_strings; |
| 50 | abi_ulong env_strings; |
| 51 | abi_ulong file_string; |
Paul Brook | d8fd295 | 2012-03-30 18:02:50 +0100 | [diff] [blame] | 52 | uint32_t elf_flags; |
Paolo Bonzini | 7d37435 | 2018-12-13 23:37:37 +0100 | [diff] [blame] | 53 | int personality; |
Laurent Vivier | 33143c4 | 2018-07-16 21:53:49 +0200 | [diff] [blame] | 54 | abi_ulong alignment; |
Christophe Lyon | a99856c | 2018-04-30 10:03:41 +0200 | [diff] [blame] | 55 | |
| 56 | /* The fields below are used in FDPIC mode. */ |
Mike Frysinger | 1af02e8 | 2011-02-07 01:05:50 -0500 | [diff] [blame] | 57 | abi_ulong loadmap_addr; |
| 58 | uint16_t nsegs; |
| 59 | void *loadsegs; |
| 60 | abi_ulong pt_dynamic_addr; |
Christophe Lyon | 3cb10cf | 2018-04-30 10:03:43 +0200 | [diff] [blame] | 61 | abi_ulong interpreter_loadmap_addr; |
| 62 | abi_ulong interpreter_pt_dynamic_addr; |
Mike Frysinger | 1af02e8 | 2011-02-07 01:05:50 -0500 | [diff] [blame] | 63 | struct image_info *other_info; |
Richard Henderson | 83f990e | 2020-10-21 10:37:47 -0700 | [diff] [blame] | 64 | |
| 65 | /* For target-specific processing of NT_GNU_PROPERTY_TYPE_0. */ |
| 66 | uint32_t note_flags; |
| 67 | |
Stefan Markovic | 74cfc70 | 2018-10-22 16:43:40 +0200 | [diff] [blame] | 68 | #ifdef TARGET_MIPS |
| 69 | int fp_abi; |
| 70 | int interp_fp_abi; |
| 71 | #endif |
bellard | 31e31b8 | 2003-02-18 22:55:36 +0000 | [diff] [blame] | 72 | }; |
| 73 | |
bellard | b346ff4 | 2003-06-15 20:05:50 +0000 | [diff] [blame] | 74 | #ifdef TARGET_I386 |
bellard | 851e67a | 2003-03-29 16:53:14 +0000 | [diff] [blame] | 75 | /* Information about the current linux thread */ |
| 76 | struct vm86_saved_state { |
| 77 | uint32_t eax; /* return code */ |
| 78 | uint32_t ebx; |
| 79 | uint32_t ecx; |
| 80 | uint32_t edx; |
| 81 | uint32_t esi; |
| 82 | uint32_t edi; |
| 83 | uint32_t ebp; |
| 84 | uint32_t esp; |
| 85 | uint32_t eflags; |
| 86 | uint32_t eip; |
| 87 | uint16_t cs, ss, ds, es, fs, gs; |
| 88 | }; |
bellard | b346ff4 | 2003-06-15 20:05:50 +0000 | [diff] [blame] | 89 | #endif |
bellard | 851e67a | 2003-03-29 16:53:14 +0000 | [diff] [blame] | 90 | |
Peter Maydell | 848d72c | 2013-09-03 20:12:17 +0100 | [diff] [blame] | 91 | #if defined(TARGET_ARM) && defined(TARGET_ABI32) |
bellard | 28c4f36 | 2004-02-16 21:47:43 +0000 | [diff] [blame] | 92 | /* FPU emulator */ |
| 93 | #include "nwfpe/fpa11.h" |
bellard | 28c4f36 | 2004-02-16 21:47:43 +0000 | [diff] [blame] | 94 | #endif |
| 95 | |
pbrook | 624f797 | 2008-05-31 16:11:38 +0000 | [diff] [blame] | 96 | #define MAX_SIGQUEUE_SIZE 1024 |
| 97 | |
pbrook | 624f797 | 2008-05-31 16:11:38 +0000 | [diff] [blame] | 98 | struct emulated_sigtable { |
| 99 | int pending; /* true if signal is pending */ |
Timothy E Baldwin | 907f5fd | 2016-05-27 15:51:52 +0100 | [diff] [blame] | 100 | target_siginfo_t info; |
pbrook | 624f797 | 2008-05-31 16:11:38 +0000 | [diff] [blame] | 101 | }; |
| 102 | |
bellard | 851e67a | 2003-03-29 16:53:14 +0000 | [diff] [blame] | 103 | /* NOTE: we force a big alignment so that the stack stored after is |
| 104 | aligned too */ |
| 105 | typedef struct TaskState { |
Mika Westerberg | edf8e2a | 2009-04-07 09:57:11 +0300 | [diff] [blame] | 106 | pid_t ts_tid; /* tid (or pid) of this task */ |
bellard | 28c4f36 | 2004-02-16 21:47:43 +0000 | [diff] [blame] | 107 | #ifdef TARGET_ARM |
Peter Maydell | 848d72c | 2013-09-03 20:12:17 +0100 | [diff] [blame] | 108 | # ifdef TARGET_ABI32 |
bellard | 28c4f36 | 2004-02-16 21:47:43 +0000 | [diff] [blame] | 109 | /* FPA state */ |
| 110 | FPA11 fpa; |
Peter Maydell | 848d72c | 2013-09-03 20:12:17 +0100 | [diff] [blame] | 111 | # endif |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 112 | int swi_errno; |
bellard | 28c4f36 | 2004-02-16 21:47:43 +0000 | [diff] [blame] | 113 | #endif |
j_mayer | 84409dd | 2007-04-06 08:56:50 +0000 | [diff] [blame] | 114 | #if defined(TARGET_I386) && !defined(TARGET_X86_64) |
blueswir1 | 992f48a | 2007-10-14 16:27:31 +0000 | [diff] [blame] | 115 | abi_ulong target_v86; |
bellard | 851e67a | 2003-03-29 16:53:14 +0000 | [diff] [blame] | 116 | struct vm86_saved_state vm86_saved_regs; |
bellard | b333af0 | 2003-05-14 21:48:51 +0000 | [diff] [blame] | 117 | struct target_vm86plus_struct vm86plus; |
bellard | 631271d | 2003-05-10 13:14:52 +0000 | [diff] [blame] | 118 | uint32_t v86flags; |
| 119 | uint32_t v86mask; |
bellard | b346ff4 | 2003-06-15 20:05:50 +0000 | [diff] [blame] | 120 | #endif |
pbrook | c276471 | 2009-03-07 15:24:59 +0000 | [diff] [blame] | 121 | abi_ulong child_tidptr; |
pbrook | e6e5906 | 2006-10-22 00:18:54 +0000 | [diff] [blame] | 122 | #ifdef TARGET_M68K |
Peter Maydell | 1ccd937 | 2013-07-16 18:44:55 +0100 | [diff] [blame] | 123 | abi_ulong tp_value; |
pbrook | e6e5906 | 2006-10-22 00:18:54 +0000 | [diff] [blame] | 124 | #endif |
Peter Maydell | daa4374 | 2018-03-08 14:47:32 +0000 | [diff] [blame] | 125 | #if defined(TARGET_ARM) || defined(TARGET_M68K) |
pbrook | a87295e | 2007-05-26 15:09:38 +0000 | [diff] [blame] | 126 | /* Extra fields for semihosted binaries. */ |
Peter Maydell | d317091 | 2016-07-04 13:06:35 +0100 | [diff] [blame] | 127 | abi_ulong heap_base; |
| 128 | abi_ulong heap_limit; |
pbrook | a87295e | 2007-05-26 15:09:38 +0000 | [diff] [blame] | 129 | #endif |
Peter Maydell | d317091 | 2016-07-04 13:06:35 +0100 | [diff] [blame] | 130 | abi_ulong stack_base; |
bellard | 851e67a | 2003-03-29 16:53:14 +0000 | [diff] [blame] | 131 | int used; /* non zero if used */ |
pbrook | 978efd6 | 2006-06-17 18:30:42 +0000 | [diff] [blame] | 132 | struct image_info *info; |
Mika Westerberg | edf8e2a | 2009-04-07 09:57:11 +0300 | [diff] [blame] | 133 | struct linux_binprm *bprm; |
pbrook | 624f797 | 2008-05-31 16:11:38 +0000 | [diff] [blame] | 134 | |
Timothy E Baldwin | 655ed67 | 2016-05-27 15:51:53 +0100 | [diff] [blame] | 135 | struct emulated_sigtable sync_signal; |
pbrook | 624f797 | 2008-05-31 16:11:38 +0000 | [diff] [blame] | 136 | struct emulated_sigtable sigtab[TARGET_NSIG]; |
Peter Maydell | 3d3efba | 2016-05-27 15:51:49 +0100 | [diff] [blame] | 137 | /* This thread's signal mask, as requested by the guest program. |
| 138 | * The actual signal mask of this thread may differ: |
| 139 | * + we don't let SIGSEGV and SIGBUS be blocked while running guest code |
| 140 | * + sometimes we block all signals to avoid races |
| 141 | */ |
| 142 | sigset_t signal_mask; |
| 143 | /* The signal mask imposed by a guest sigsuspend syscall, if we are |
| 144 | * currently in the middle of such a syscall |
| 145 | */ |
| 146 | sigset_t sigsuspend_mask; |
| 147 | /* Nonzero if we're leaving a sigsuspend and sigsuspend_mask is valid. */ |
| 148 | int in_sigsuspend; |
| 149 | |
| 150 | /* Nonzero if process_pending_signals() needs to do something (either |
| 151 | * handle a pending signal or unblock signals). |
| 152 | * This flag is written from a signal handler so should be accessed via |
Stefan Hajnoczi | d73415a | 2020-09-23 11:56:46 +0100 | [diff] [blame] | 153 | * the qatomic_read() and qatomic_set() functions. (It is not accessed |
Peter Maydell | 3d3efba | 2016-05-27 15:51:49 +0100 | [diff] [blame] | 154 | * from multiple threads.) |
| 155 | */ |
| 156 | int signal_pending; |
| 157 | |
Peter Maydell | 5bfce0b | 2019-07-25 14:16:45 +0100 | [diff] [blame] | 158 | /* This thread's sigaltstack, if it has one */ |
| 159 | struct target_sigaltstack sigaltstack_used; |
bellard | 851e67a | 2003-03-29 16:53:14 +0000 | [diff] [blame] | 160 | } __attribute__((aligned(16))) TaskState; |
| 161 | |
aurel32 | d088d66 | 2009-01-30 20:09:01 +0000 | [diff] [blame] | 162 | extern char *exec_path; |
pbrook | 624f797 | 2008-05-31 16:11:38 +0000 | [diff] [blame] | 163 | void init_task_state(TaskState *ts); |
Mika Westerberg | edf8e2a | 2009-04-07 09:57:11 +0300 | [diff] [blame] | 164 | void task_settid(TaskState *); |
| 165 | void stop_all_tasks(void); |
pbrook | c593722 | 2006-05-14 11:30:38 +0000 | [diff] [blame] | 166 | extern const char *qemu_uname_release; |
Paul Brook | 379f669 | 2009-07-17 12:48:08 +0100 | [diff] [blame] | 167 | extern unsigned long mmap_min_addr; |
bellard | 851e67a | 2003-03-29 16:53:14 +0000 | [diff] [blame] | 168 | |
pbrook | e5fe0c5 | 2006-06-11 13:32:59 +0000 | [diff] [blame] | 169 | /* ??? See if we can avoid exposing so much of the loader internals. */ |
pbrook | e5fe0c5 | 2006-06-11 13:32:59 +0000 | [diff] [blame] | 170 | |
Richard Henderson | 9955ffa | 2010-07-27 10:25:30 -0700 | [diff] [blame] | 171 | /* Read a good amount of data initially, to hopefully get all the |
| 172 | program headers loaded. */ |
| 173 | #define BPRM_BUF_SIZE 1024 |
| 174 | |
pbrook | e5fe0c5 | 2006-06-11 13:32:59 +0000 | [diff] [blame] | 175 | /* |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 176 | * This structure is used to hold the arguments that are |
pbrook | e5fe0c5 | 2006-06-11 13:32:59 +0000 | [diff] [blame] | 177 | * used when loading binaries. |
| 178 | */ |
| 179 | struct linux_binprm { |
Richard Henderson | 9955ffa | 2010-07-27 10:25:30 -0700 | [diff] [blame] | 180 | char buf[BPRM_BUF_SIZE] __attribute__((aligned)); |
blueswir1 | 992f48a | 2007-10-14 16:27:31 +0000 | [diff] [blame] | 181 | abi_ulong p; |
Paolo Bonzini | 7d37435 | 2018-12-13 23:37:37 +0100 | [diff] [blame] | 182 | int fd; |
pbrook | e5fe0c5 | 2006-06-11 13:32:59 +0000 | [diff] [blame] | 183 | int e_uid, e_gid; |
| 184 | int argc, envc; |
| 185 | char **argv; |
| 186 | char **envp; |
| 187 | char * filename; /* Name of binary */ |
Andreas Färber | 9349b4f | 2012-03-14 01:38:32 +0100 | [diff] [blame] | 188 | int (*core_dump)(int, const CPUArchState *); /* coredump routine */ |
pbrook | e5fe0c5 | 2006-06-11 13:32:59 +0000 | [diff] [blame] | 189 | }; |
| 190 | |
Filip Bozuta | 79482e59 | 2020-06-19 14:47:27 +0200 | [diff] [blame] | 191 | typedef struct IOCTLEntry IOCTLEntry; |
| 192 | |
| 193 | typedef abi_long do_ioctl_fn(const IOCTLEntry *ie, uint8_t *buf_temp, |
| 194 | int fd, int cmd, abi_long arg); |
| 195 | |
| 196 | struct IOCTLEntry { |
| 197 | int target_cmd; |
| 198 | unsigned int host_cmd; |
| 199 | const char *name; |
| 200 | int access; |
| 201 | do_ioctl_fn *do_ioctl; |
| 202 | const argtype arg_type[5]; |
| 203 | }; |
| 204 | |
| 205 | extern IOCTLEntry ioctl_entries[]; |
| 206 | |
| 207 | #define IOC_R 0x0001 |
| 208 | #define IOC_W 0x0002 |
| 209 | #define IOC_RW (IOC_R | IOC_W) |
| 210 | |
pbrook | e5fe0c5 | 2006-06-11 13:32:59 +0000 | [diff] [blame] | 211 | void do_init_thread(struct target_pt_regs *regs, struct image_info *infop); |
blueswir1 | 992f48a | 2007-10-14 16:27:31 +0000 | [diff] [blame] | 212 | abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, |
| 213 | abi_ulong stringp, int push_ptr); |
Laurent Vivier | 03cfd8f | 2013-08-30 01:46:44 +0200 | [diff] [blame] | 214 | int loader_exec(int fdexec, const char *filename, char **argv, char **envp, |
Mika Westerberg | edf8e2a | 2009-04-07 09:57:11 +0300 | [diff] [blame] | 215 | struct target_pt_regs * regs, struct image_info *infop, |
| 216 | struct linux_binprm *); |
bellard | 31e31b8 | 2003-02-18 22:55:36 +0000 | [diff] [blame] | 217 | |
Christophe Lyon | 3cb10cf | 2018-04-30 10:03:43 +0200 | [diff] [blame] | 218 | /* Returns true if the image uses the FDPIC ABI. If this is the case, |
| 219 | * we have to provide some information (loadmap, pt_dynamic_info) such |
| 220 | * that the program can be relocated adequately. This is also useful |
| 221 | * when handling signals. |
| 222 | */ |
| 223 | int info_is_fdpic(struct image_info *info); |
| 224 | |
YunQiang Su | 768fe76 | 2018-02-20 18:33:05 +0100 | [diff] [blame] | 225 | uint32_t get_elf_eflags(int fd); |
Will Newton | f0116c5 | 2014-01-09 09:10:50 +0000 | [diff] [blame] | 226 | int load_elf_binary(struct linux_binprm *bprm, struct image_info *info); |
| 227 | int load_flt_binary(struct linux_binprm *bprm, struct image_info *info); |
pbrook | e5fe0c5 | 2006-06-11 13:32:59 +0000 | [diff] [blame] | 228 | |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 229 | abi_long memcpy_to_target(abi_ulong dest, const void *src, |
| 230 | unsigned long len); |
blueswir1 | 992f48a | 2007-10-14 16:27:31 +0000 | [diff] [blame] | 231 | void target_set_brk(abi_ulong new_brk); |
| 232 | abi_long do_brk(abi_ulong new_brk); |
bellard | 31e31b8 | 2003-02-18 22:55:36 +0000 | [diff] [blame] | 233 | void syscall_init(void); |
blueswir1 | 992f48a | 2007-10-14 16:27:31 +0000 | [diff] [blame] | 234 | abi_long do_syscall(void *cpu_env, int num, abi_long arg1, |
| 235 | abi_long arg2, abi_long arg3, abi_long arg4, |
Peter Maydell | 5945cfc | 2011-06-16 17:37:13 +0100 | [diff] [blame] | 236 | abi_long arg5, abi_long arg6, abi_long arg7, |
| 237 | abi_long arg8); |
Peter Maydell | b44316f | 2018-02-13 13:22:46 +0000 | [diff] [blame] | 238 | extern __thread CPUState *thread_cpu; |
Andreas Färber | 9349b4f | 2012-03-14 01:38:32 +0100 | [diff] [blame] | 239 | void cpu_loop(CPUArchState *env); |
Peter Maydell | 7dcdaea | 2016-06-06 19:58:18 +0100 | [diff] [blame] | 240 | const char *target_strerror(int err); |
pbrook | a745ec6 | 2008-05-06 15:36:17 +0000 | [diff] [blame] | 241 | int get_osversion(void); |
Peter Maydell | 4a24a75 | 2013-09-03 20:12:20 +0100 | [diff] [blame] | 242 | void init_qemu_uname_release(void); |
pbrook | d597536 | 2008-06-07 20:50:51 +0000 | [diff] [blame] | 243 | void fork_start(void); |
| 244 | void fork_end(int child); |
bellard | 6977fbf | 2003-04-29 20:39:23 +0000 | [diff] [blame] | 245 | |
Alex Bennée | ee94743 | 2020-05-13 18:51:28 +0100 | [diff] [blame] | 246 | /** |
| 247 | * probe_guest_base: |
| 248 | * @image_name: the executable being loaded |
| 249 | * @loaddr: the lowest fixed address in the executable |
| 250 | * @hiaddr: the highest fixed address in the executable |
| 251 | * |
| 252 | * Creates the initial guest address space in the host memory space. |
| 253 | * |
| 254 | * If @loaddr == 0, then no address in the executable is fixed, |
| 255 | * i.e. it is fully relocatable. In that case @hiaddr is the size |
| 256 | * of the executable. |
| 257 | * |
| 258 | * This function will not return if a valid value for guest_base |
| 259 | * cannot be chosen. On return, the executable loader can expect |
| 260 | * |
| 261 | * target_mmap(loaddr, hiaddr - loaddr, ...) |
| 262 | * |
| 263 | * to succeed. |
Meador Inge | dce1040 | 2012-07-26 16:50:01 +0000 | [diff] [blame] | 264 | */ |
Alex Bennée | ee94743 | 2020-05-13 18:51:28 +0100 | [diff] [blame] | 265 | void probe_guest_base(const char *image_name, |
| 266 | abi_ulong loaddr, abi_ulong hiaddr); |
Meador Inge | dce1040 | 2012-07-26 16:50:01 +0000 | [diff] [blame] | 267 | |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 268 | #include "qemu/log.h" |
bellard | 631271d | 2003-05-10 13:14:52 +0000 | [diff] [blame] | 269 | |
Timothy E Baldwin | 4d330ce | 2016-05-12 18:47:46 +0100 | [diff] [blame] | 270 | /* safe_syscall.S */ |
| 271 | |
| 272 | /** |
| 273 | * safe_syscall: |
| 274 | * @int number: number of system call to make |
| 275 | * ...: arguments to the system call |
| 276 | * |
| 277 | * Call a system call if guest signal not pending. |
| 278 | * This has the same API as the libc syscall() function, except that it |
| 279 | * may return -1 with errno == TARGET_ERESTARTSYS if a signal was pending. |
| 280 | * |
| 281 | * Returns: the system call result, or -1 with an error code in errno |
| 282 | * (Errnos are host errnos; we rely on TARGET_ERESTARTSYS not clashing |
| 283 | * with any of the host errno values.) |
| 284 | */ |
| 285 | |
| 286 | /* A guide to using safe_syscall() to handle interactions between guest |
| 287 | * syscalls and guest signals: |
| 288 | * |
| 289 | * Guest syscalls come in two flavours: |
| 290 | * |
| 291 | * (1) Non-interruptible syscalls |
| 292 | * |
| 293 | * These are guest syscalls that never get interrupted by signals and |
| 294 | * so never return EINTR. They can be implemented straightforwardly in |
| 295 | * QEMU: just make sure that if the implementation code has to make any |
| 296 | * blocking calls that those calls are retried if they return EINTR. |
| 297 | * It's also OK to implement these with safe_syscall, though it will be |
| 298 | * a little less efficient if a signal is delivered at the 'wrong' moment. |
| 299 | * |
Peter Maydell | 3d3efba | 2016-05-27 15:51:49 +0100 | [diff] [blame] | 300 | * Some non-interruptible syscalls need to be handled using block_signals() |
| 301 | * to block signals for the duration of the syscall. This mainly applies |
| 302 | * to code which needs to modify the data structures used by the |
| 303 | * host_signal_handler() function and the functions it calls, including |
| 304 | * all syscalls which change the thread's signal mask. |
| 305 | * |
Timothy E Baldwin | 4d330ce | 2016-05-12 18:47:46 +0100 | [diff] [blame] | 306 | * (2) Interruptible syscalls |
| 307 | * |
| 308 | * These are guest syscalls that can be interrupted by signals and |
| 309 | * for which we need to either return EINTR or arrange for the guest |
| 310 | * syscall to be restarted. This category includes both syscalls which |
| 311 | * always restart (and in the kernel return -ERESTARTNOINTR), ones |
| 312 | * which only restart if there is no handler (kernel returns -ERESTARTNOHAND |
| 313 | * or -ERESTART_RESTARTBLOCK), and the most common kind which restart |
| 314 | * if the handler was registered with SA_RESTART (kernel returns |
| 315 | * -ERESTARTSYS). System calls which are only interruptible in some |
| 316 | * situations (like 'open') also need to be handled this way. |
| 317 | * |
| 318 | * Here it is important that the host syscall is made |
| 319 | * via this safe_syscall() function, and *not* via the host libc. |
| 320 | * If the host libc is used then the implementation will appear to work |
| 321 | * most of the time, but there will be a race condition where a |
| 322 | * signal could arrive just before we make the host syscall inside libc, |
| 323 | * and then then guest syscall will not correctly be interrupted. |
| 324 | * Instead the implementation of the guest syscall can use the safe_syscall |
| 325 | * function but otherwise just return the result or errno in the usual |
| 326 | * way; the main loop code will take care of restarting the syscall |
| 327 | * if appropriate. |
| 328 | * |
| 329 | * (If the implementation needs to make multiple host syscalls this is |
| 330 | * OK; any which might really block must be via safe_syscall(); for those |
| 331 | * which are only technically blocking (ie which we know in practice won't |
| 332 | * stay in the host kernel indefinitely) it's OK to use libc if necessary. |
| 333 | * You must be able to cope with backing out correctly if some safe_syscall |
| 334 | * you make in the implementation returns either -TARGET_ERESTARTSYS or |
| 335 | * EINTR though.) |
| 336 | * |
Peter Maydell | 3d3efba | 2016-05-27 15:51:49 +0100 | [diff] [blame] | 337 | * block_signals() cannot be used for interruptible syscalls. |
| 338 | * |
Timothy E Baldwin | 4d330ce | 2016-05-12 18:47:46 +0100 | [diff] [blame] | 339 | * |
| 340 | * How and why the safe_syscall implementation works: |
| 341 | * |
| 342 | * The basic setup is that we make the host syscall via a known |
| 343 | * section of host native assembly. If a signal occurs, our signal |
| 344 | * handler checks the interrupted host PC against the addresse of that |
| 345 | * known section. If the PC is before or at the address of the syscall |
| 346 | * instruction then we change the PC to point at a "return |
| 347 | * -TARGET_ERESTARTSYS" code path instead, and then exit the signal handler |
| 348 | * (causing the safe_syscall() call to immediately return that value). |
| 349 | * Then in the main.c loop if we see this magic return value we adjust |
| 350 | * the guest PC to wind it back to before the system call, and invoke |
| 351 | * the guest signal handler as usual. |
| 352 | * |
| 353 | * This winding-back will happen in two cases: |
| 354 | * (1) signal came in just before we took the host syscall (a race); |
| 355 | * in this case we'll take the guest signal and have another go |
| 356 | * at the syscall afterwards, and this is indistinguishable for the |
| 357 | * guest from the timing having been different such that the guest |
| 358 | * signal really did win the race |
| 359 | * (2) signal came in while the host syscall was blocking, and the |
| 360 | * host kernel decided the syscall should be restarted; |
| 361 | * in this case we want to restart the guest syscall also, and so |
| 362 | * rewinding is the right thing. (Note that "restart" semantics mean |
| 363 | * "first call the signal handler, then reattempt the syscall".) |
| 364 | * The other situation to consider is when a signal came in while the |
| 365 | * host syscall was blocking, and the host kernel decided that the syscall |
| 366 | * should not be restarted; in this case QEMU's host signal handler will |
| 367 | * be invoked with the PC pointing just after the syscall instruction, |
| 368 | * with registers indicating an EINTR return; the special code in the |
| 369 | * handler will not kick in, and we will return EINTR to the guest as |
| 370 | * we should. |
| 371 | * |
| 372 | * Notice that we can leave the host kernel to make the decision for |
| 373 | * us about whether to do a restart of the syscall or not; we do not |
| 374 | * need to check SA_RESTART flags in QEMU or distinguish the various |
| 375 | * kinds of restartability. |
| 376 | */ |
| 377 | #ifdef HAVE_SAFE_SYSCALL |
| 378 | /* The core part of this function is implemented in assembly */ |
| 379 | extern long safe_syscall_base(int *pending, long number, ...); |
| 380 | |
| 381 | #define safe_syscall(...) \ |
| 382 | ({ \ |
| 383 | long ret_; \ |
| 384 | int *psp_ = &((TaskState *)thread_cpu->opaque)->signal_pending; \ |
| 385 | ret_ = safe_syscall_base(psp_, __VA_ARGS__); \ |
| 386 | if (is_error(ret_)) { \ |
| 387 | errno = -ret_; \ |
| 388 | ret_ = -1; \ |
| 389 | } \ |
| 390 | ret_; \ |
| 391 | }) |
| 392 | |
| 393 | #else |
| 394 | |
| 395 | /* Fallback for architectures which don't yet provide a safe-syscall assembly |
| 396 | * fragment; note that this is racy! |
| 397 | * This should go away when all host architectures have been updated. |
| 398 | */ |
| 399 | #define safe_syscall syscall |
| 400 | |
| 401 | #endif |
| 402 | |
Richard Henderson | a05c640 | 2012-09-15 11:34:20 -0700 | [diff] [blame] | 403 | /* syscall.c */ |
| 404 | int host_to_target_waitstatus(int status); |
| 405 | |
ths | b92c47c | 2007-11-01 00:07:38 +0000 | [diff] [blame] | 406 | /* strace.c */ |
Filip Bozuta | e400e11 | 2020-08-11 18:45:49 +0200 | [diff] [blame] | 407 | void print_syscall(void *cpu_env, int num, |
bellard | c16f9ed | 2007-11-11 17:23:29 +0000 | [diff] [blame] | 408 | abi_long arg1, abi_long arg2, abi_long arg3, |
| 409 | abi_long arg4, abi_long arg5, abi_long arg6); |
Filip Bozuta | e400e11 | 2020-08-11 18:45:49 +0200 | [diff] [blame] | 410 | void print_syscall_ret(void *cpu_env, int num, abi_long ret, |
Filip Bozuta | c84be71 | 2020-06-19 14:33:26 +0200 | [diff] [blame] | 411 | abi_long arg1, abi_long arg2, abi_long arg3, |
| 412 | abi_long arg4, abi_long arg5, abi_long arg6); |
Peter Maydell | 0cb581d | 2016-07-18 18:12:24 +0100 | [diff] [blame] | 413 | /** |
| 414 | * print_taken_signal: |
| 415 | * @target_signum: target signal being taken |
| 416 | * @tinfo: target_siginfo_t which will be passed to the guest for the signal |
| 417 | * |
| 418 | * Print strace output indicating that this signal is being taken by the guest, |
| 419 | * in a format similar to: |
| 420 | * --- SIGSEGV {si_signo=SIGSEGV, si_code=SI_KERNEL, si_addr=0} --- |
| 421 | */ |
| 422 | void print_taken_signal(int target_signum, const target_siginfo_t *tinfo); |
ths | b92c47c | 2007-11-01 00:07:38 +0000 | [diff] [blame] | 423 | |
bellard | b346ff4 | 2003-06-15 20:05:50 +0000 | [diff] [blame] | 424 | /* signal.c */ |
Andreas Färber | 9349b4f | 2012-03-14 01:38:32 +0100 | [diff] [blame] | 425 | void process_pending_signals(CPUArchState *cpu_env); |
bellard | b346ff4 | 2003-06-15 20:05:50 +0000 | [diff] [blame] | 426 | void signal_init(void); |
Peter Maydell | 9d2803f | 2016-07-28 16:44:46 +0100 | [diff] [blame] | 427 | int queue_signal(CPUArchState *env, int sig, int si_type, |
| 428 | target_siginfo_t *info); |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 429 | void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info); |
| 430 | void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo); |
pbrook | 4cb0596 | 2008-05-30 18:05:19 +0000 | [diff] [blame] | 431 | int target_to_host_signal(int sig); |
pbrook | 1d9d8b5 | 2009-04-16 15:17:02 +0000 | [diff] [blame] | 432 | int host_to_target_signal(int sig); |
Andreas Färber | 9349b4f | 2012-03-14 01:38:32 +0100 | [diff] [blame] | 433 | long do_sigreturn(CPUArchState *env); |
| 434 | long do_rt_sigreturn(CPUArchState *env); |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 435 | abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp); |
Alex Barcelo | 1c27592 | 2014-03-14 14:36:55 +0000 | [diff] [blame] | 436 | int do_sigprocmask(int how, const sigset_t *set, sigset_t *oldset); |
Richard Henderson | fa97e38 | 2018-07-18 13:06:48 -0700 | [diff] [blame] | 437 | abi_long do_swapcontext(CPUArchState *env, abi_ulong uold_ctx, |
| 438 | abi_ulong unew_ctx, abi_long ctx_size); |
Peter Maydell | 3d3efba | 2016-05-27 15:51:49 +0100 | [diff] [blame] | 439 | /** |
| 440 | * block_signals: block all signals while handling this guest syscall |
| 441 | * |
| 442 | * Block all signals, and arrange that the signal mask is returned to |
| 443 | * its correct value for the guest before we resume execution of guest code. |
| 444 | * If this function returns non-zero, then the caller should immediately |
| 445 | * return -TARGET_ERESTARTSYS to the main loop, which will take the pending |
| 446 | * signal and restart execution of the syscall. |
| 447 | * If block_signals() returns zero, then the caller can continue with |
| 448 | * emulation of the system call knowing that no signals can be taken |
| 449 | * (and therefore that no race conditions will result). |
| 450 | * This should only be called once, because if it is called a second time |
| 451 | * it will always return non-zero. (Think of it like a mutex that can't |
| 452 | * be recursively locked.) |
| 453 | * Signals will be unblocked again by process_pending_signals(). |
| 454 | * |
| 455 | * Return value: non-zero if there was a pending signal, zero if not. |
| 456 | */ |
| 457 | int block_signals(void); /* Returns non zero if signal pending */ |
bellard | b346ff4 | 2003-06-15 20:05:50 +0000 | [diff] [blame] | 458 | |
| 459 | #ifdef TARGET_I386 |
bellard | 631271d | 2003-05-10 13:14:52 +0000 | [diff] [blame] | 460 | /* vm86.c */ |
| 461 | void save_v86_state(CPUX86State *env); |
bellard | 447db21 | 2003-05-10 15:10:36 +0000 | [diff] [blame] | 462 | void handle_vm86_trap(CPUX86State *env, int trapno); |
bellard | 631271d | 2003-05-10 13:14:52 +0000 | [diff] [blame] | 463 | void handle_vm86_fault(CPUX86State *env); |
blueswir1 | 992f48a | 2007-10-14 16:27:31 +0000 | [diff] [blame] | 464 | int do_vm86(CPUX86State *env, long subfunction, abi_ulong v86_addr); |
blueswir1 | 5bfb56b | 2007-10-05 17:01:51 +0000 | [diff] [blame] | 465 | #elif defined(TARGET_SPARC64) |
| 466 | void sparc64_set_context(CPUSPARCState *env); |
| 467 | void sparc64_get_context(CPUSPARCState *env); |
bellard | b346ff4 | 2003-06-15 20:05:50 +0000 | [diff] [blame] | 468 | #endif |
bellard | 631271d | 2003-05-10 13:14:52 +0000 | [diff] [blame] | 469 | |
bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 470 | /* mmap.c */ |
blueswir1 | 992f48a | 2007-10-14 16:27:31 +0000 | [diff] [blame] | 471 | int target_mprotect(abi_ulong start, abi_ulong len, int prot); |
| 472 | abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, |
| 473 | int flags, int fd, abi_ulong offset); |
| 474 | int target_munmap(abi_ulong start, abi_ulong len); |
| 475 | abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, |
| 476 | abi_ulong new_size, unsigned long flags, |
| 477 | abi_ulong new_addr); |
pbrook | 0776590 | 2008-05-31 16:33:53 +0000 | [diff] [blame] | 478 | extern unsigned long last_brk; |
Peter Maydell | 59e9d91 | 2012-03-08 14:40:33 +0000 | [diff] [blame] | 479 | extern abi_ulong mmap_next_start; |
Richard Henderson | 30ab9ef | 2019-05-19 13:19:52 -0700 | [diff] [blame] | 480 | abi_ulong mmap_find_vma(abi_ulong, abi_ulong, abi_ulong); |
pbrook | d597536 | 2008-06-07 20:50:51 +0000 | [diff] [blame] | 481 | void mmap_fork_start(void); |
| 482 | void mmap_fork_end(int child); |
bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 483 | |
blueswir1 | 440c7e8 | 2008-10-05 11:05:14 +0000 | [diff] [blame] | 484 | /* main.c */ |
Richard Henderson | 703e0e8 | 2010-03-19 14:21:13 -0700 | [diff] [blame] | 485 | extern unsigned long guest_stack_size; |
blueswir1 | 440c7e8 | 2008-10-05 11:05:14 +0000 | [diff] [blame] | 486 | |
bellard | edf779f | 2004-02-22 13:40:13 +0000 | [diff] [blame] | 487 | /* user access */ |
| 488 | |
| 489 | #define VERIFY_READ 0 |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 490 | #define VERIFY_WRITE 1 /* implies read access */ |
bellard | edf779f | 2004-02-22 13:40:13 +0000 | [diff] [blame] | 491 | |
bellard | dae3270 | 2007-11-14 10:51:00 +0000 | [diff] [blame] | 492 | static inline int access_ok(int type, abi_ulong addr, abi_ulong size) |
| 493 | { |
Rémi Denis-Courmont | 0acd4ab | 2019-07-04 10:41:15 +0200 | [diff] [blame] | 494 | return guest_addr_valid(addr) && |
| 495 | (size == 0 || guest_addr_valid(addr + size - 1)) && |
| 496 | page_check_range((target_ulong)addr, size, |
bellard | dae3270 | 2007-11-14 10:51:00 +0000 | [diff] [blame] | 497 | (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0; |
| 498 | } |
bellard | edf779f | 2004-02-22 13:40:13 +0000 | [diff] [blame] | 499 | |
Richard Henderson | 658f2dc | 2013-01-04 16:39:31 -0800 | [diff] [blame] | 500 | /* NOTE __get_user and __put_user use host pointers and don't check access. |
| 501 | These are usually used to access struct data members once the struct has |
| 502 | been locked - usually with lock_user_struct. */ |
bellard | edf779f | 2004-02-22 13:40:13 +0000 | [diff] [blame] | 503 | |
Peter Maydell | 850d5e3 | 2018-10-09 17:18:14 +0100 | [diff] [blame] | 504 | /* |
| 505 | * Tricky points: |
| 506 | * - Use __builtin_choose_expr to avoid type promotion from ?:, |
| 507 | * - Invalid sizes result in a compile time error stemming from |
| 508 | * the fact that abort has no parameters. |
| 509 | * - It's easier to use the endian-specific unaligned load/store |
| 510 | * functions than host-endian unaligned load/store plus tswapN. |
| 511 | * - The pragmas are necessary only to silence a clang false-positive |
| 512 | * warning: see https://bugs.llvm.org/show_bug.cgi?id=39113 . |
Peter Maydell | 850d5e3 | 2018-10-09 17:18:14 +0100 | [diff] [blame] | 513 | * - gcc has bugs in its _Pragma() support in some versions, eg |
| 514 | * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83256 -- so we only |
| 515 | * include the warning-suppression pragmas for clang |
| 516 | */ |
Thomas Huth | 798b858 | 2018-11-30 09:23:16 +0100 | [diff] [blame] | 517 | #if defined(__clang__) && __has_warning("-Waddress-of-packed-member") |
Peter Maydell | 850d5e3 | 2018-10-09 17:18:14 +0100 | [diff] [blame] | 518 | #define PRAGMA_DISABLE_PACKED_WARNING \ |
| 519 | _Pragma("GCC diagnostic push"); \ |
Peter Maydell | 850d5e3 | 2018-10-09 17:18:14 +0100 | [diff] [blame] | 520 | _Pragma("GCC diagnostic ignored \"-Waddress-of-packed-member\"") |
Richard Henderson | 658f2dc | 2013-01-04 16:39:31 -0800 | [diff] [blame] | 521 | |
Peter Maydell | 850d5e3 | 2018-10-09 17:18:14 +0100 | [diff] [blame] | 522 | #define PRAGMA_REENABLE_PACKED_WARNING \ |
| 523 | _Pragma("GCC diagnostic pop") |
Richard Henderson | 658f2dc | 2013-01-04 16:39:31 -0800 | [diff] [blame] | 524 | |
Peter Maydell | 850d5e3 | 2018-10-09 17:18:14 +0100 | [diff] [blame] | 525 | #else |
| 526 | #define PRAGMA_DISABLE_PACKED_WARNING |
| 527 | #define PRAGMA_REENABLE_PACKED_WARNING |
| 528 | #endif |
| 529 | |
| 530 | #define __put_user_e(x, hptr, e) \ |
| 531 | do { \ |
| 532 | PRAGMA_DISABLE_PACKED_WARNING; \ |
| 533 | (__builtin_choose_expr(sizeof(*(hptr)) == 1, stb_p, \ |
| 534 | __builtin_choose_expr(sizeof(*(hptr)) == 2, stw_##e##_p, \ |
| 535 | __builtin_choose_expr(sizeof(*(hptr)) == 4, stl_##e##_p, \ |
| 536 | __builtin_choose_expr(sizeof(*(hptr)) == 8, stq_##e##_p, abort)))) \ |
| 537 | ((hptr), (x)), (void)0); \ |
| 538 | PRAGMA_REENABLE_PACKED_WARNING; \ |
| 539 | } while (0) |
| 540 | |
| 541 | #define __get_user_e(x, hptr, e) \ |
| 542 | do { \ |
| 543 | PRAGMA_DISABLE_PACKED_WARNING; \ |
| 544 | ((x) = (typeof(*hptr))( \ |
| 545 | __builtin_choose_expr(sizeof(*(hptr)) == 1, ldub_p, \ |
| 546 | __builtin_choose_expr(sizeof(*(hptr)) == 2, lduw_##e##_p, \ |
| 547 | __builtin_choose_expr(sizeof(*(hptr)) == 4, ldl_##e##_p, \ |
| 548 | __builtin_choose_expr(sizeof(*(hptr)) == 8, ldq_##e##_p, abort)))) \ |
| 549 | (hptr)), (void)0); \ |
| 550 | PRAGMA_REENABLE_PACKED_WARNING; \ |
| 551 | } while (0) |
| 552 | |
Richard Henderson | 658f2dc | 2013-01-04 16:39:31 -0800 | [diff] [blame] | 553 | |
| 554 | #ifdef TARGET_WORDS_BIGENDIAN |
| 555 | # define __put_user(x, hptr) __put_user_e(x, hptr, be) |
| 556 | # define __get_user(x, hptr) __get_user_e(x, hptr, be) |
| 557 | #else |
| 558 | # define __put_user(x, hptr) __put_user_e(x, hptr, le) |
| 559 | # define __get_user(x, hptr) __get_user_e(x, hptr, le) |
| 560 | #endif |
bellard | edf779f | 2004-02-22 13:40:13 +0000 | [diff] [blame] | 561 | |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 562 | /* put_user()/get_user() take a guest address and check access */ |
| 563 | /* These are usually used to access an atomic data type, such as an int, |
| 564 | * that has been passed by address. These internally perform locking |
| 565 | * and unlocking on the data type. |
| 566 | */ |
| 567 | #define put_user(x, gaddr, target_type) \ |
| 568 | ({ \ |
| 569 | abi_ulong __gaddr = (gaddr); \ |
| 570 | target_type *__hptr; \ |
Riku Voipio | a42267e | 2014-04-22 15:40:50 +0300 | [diff] [blame] | 571 | abi_long __ret = 0; \ |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 572 | if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \ |
Riku Voipio | a42267e | 2014-04-22 15:40:50 +0300 | [diff] [blame] | 573 | __put_user((x), __hptr); \ |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 574 | unlock_user(__hptr, __gaddr, sizeof(target_type)); \ |
| 575 | } else \ |
| 576 | __ret = -TARGET_EFAULT; \ |
| 577 | __ret; \ |
bellard | edf779f | 2004-02-22 13:40:13 +0000 | [diff] [blame] | 578 | }) |
| 579 | |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 580 | #define get_user(x, gaddr, target_type) \ |
| 581 | ({ \ |
| 582 | abi_ulong __gaddr = (gaddr); \ |
| 583 | target_type *__hptr; \ |
Riku Voipio | a42267e | 2014-04-22 15:40:50 +0300 | [diff] [blame] | 584 | abi_long __ret = 0; \ |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 585 | if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \ |
Riku Voipio | a42267e | 2014-04-22 15:40:50 +0300 | [diff] [blame] | 586 | __get_user((x), __hptr); \ |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 587 | unlock_user(__hptr, __gaddr, 0); \ |
bellard | 2f61969 | 2007-11-16 10:46:05 +0000 | [diff] [blame] | 588 | } else { \ |
| 589 | /* avoid warning */ \ |
| 590 | (x) = 0; \ |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 591 | __ret = -TARGET_EFAULT; \ |
bellard | 2f61969 | 2007-11-16 10:46:05 +0000 | [diff] [blame] | 592 | } \ |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 593 | __ret; \ |
bellard | edf779f | 2004-02-22 13:40:13 +0000 | [diff] [blame] | 594 | }) |
| 595 | |
bellard | 2f61969 | 2007-11-16 10:46:05 +0000 | [diff] [blame] | 596 | #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong) |
| 597 | #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long) |
| 598 | #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t) |
| 599 | #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t) |
| 600 | #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t) |
| 601 | #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t) |
| 602 | #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t) |
| 603 | #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t) |
| 604 | #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t) |
| 605 | #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t) |
| 606 | |
| 607 | #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong) |
| 608 | #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long) |
| 609 | #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t) |
| 610 | #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t) |
| 611 | #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t) |
| 612 | #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t) |
| 613 | #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t) |
| 614 | #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t) |
| 615 | #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t) |
| 616 | #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t) |
| 617 | |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 618 | /* copy_from_user() and copy_to_user() are usually used to copy data |
| 619 | * buffers between the target and host. These internally perform |
| 620 | * locking/unlocking of the memory. |
| 621 | */ |
| 622 | abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len); |
| 623 | abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len); |
| 624 | |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 625 | /* Functions for accessing guest memory. The tget and tput functions |
Stefan Weil | 6f20f55 | 2013-09-12 19:57:15 +0200 | [diff] [blame] | 626 | read/write single values, byteswapping as necessary. The lock_user function |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 627 | gets a pointer to a contiguous area of guest memory, but does not perform |
Stefan Weil | 6f20f55 | 2013-09-12 19:57:15 +0200 | [diff] [blame] | 628 | any byteswapping. lock_user may return either a pointer to the guest |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 629 | memory, or a temporary buffer. */ |
| 630 | |
| 631 | /* Lock an area of guest memory into the host. If copy is true then the |
| 632 | host area will have the same contents as the guest. */ |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 633 | static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy) |
bellard | edf779f | 2004-02-22 13:40:13 +0000 | [diff] [blame] | 634 | { |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 635 | if (!access_ok(type, guest_addr, len)) |
| 636 | return NULL; |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 637 | #ifdef DEBUG_REMAP |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 638 | { |
| 639 | void *addr; |
Md Haris Iqbal | 38e826d | 2016-03-24 00:02:03 +0530 | [diff] [blame] | 640 | addr = g_malloc(len); |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 641 | if (copy) |
| 642 | memcpy(addr, g2h(guest_addr), len); |
| 643 | else |
| 644 | memset(addr, 0, len); |
| 645 | return addr; |
| 646 | } |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 647 | #else |
| 648 | return g2h(guest_addr); |
| 649 | #endif |
bellard | edf779f | 2004-02-22 13:40:13 +0000 | [diff] [blame] | 650 | } |
| 651 | |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 652 | /* Unlock an area of guest memory. The first LEN bytes must be |
ths | 1235fc0 | 2008-06-03 19:51:57 +0000 | [diff] [blame] | 653 | flushed back to guest memory. host_ptr = NULL is explicitly |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 654 | allowed and does nothing. */ |
| 655 | static inline void unlock_user(void *host_ptr, abi_ulong guest_addr, |
blueswir1 | 992f48a | 2007-10-14 16:27:31 +0000 | [diff] [blame] | 656 | long len) |
bellard | edf779f | 2004-02-22 13:40:13 +0000 | [diff] [blame] | 657 | { |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 658 | |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 659 | #ifdef DEBUG_REMAP |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 660 | if (!host_ptr) |
| 661 | return; |
| 662 | if (host_ptr == g2h(guest_addr)) |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 663 | return; |
| 664 | if (len > 0) |
balrog | 06177d3 | 2007-12-24 13:47:52 +0000 | [diff] [blame] | 665 | memcpy(g2h(guest_addr), host_ptr, len); |
Md Haris Iqbal | 38e826d | 2016-03-24 00:02:03 +0530 | [diff] [blame] | 666 | g_free(host_ptr); |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 667 | #endif |
bellard | edf779f | 2004-02-22 13:40:13 +0000 | [diff] [blame] | 668 | } |
| 669 | |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 670 | /* Return the length of a string in target memory or -TARGET_EFAULT if |
| 671 | access error. */ |
| 672 | abi_long target_strlen(abi_ulong gaddr); |
bellard | edf779f | 2004-02-22 13:40:13 +0000 | [diff] [blame] | 673 | |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 674 | /* Like lock_user but for null terminated strings. */ |
blueswir1 | 992f48a | 2007-10-14 16:27:31 +0000 | [diff] [blame] | 675 | static inline void *lock_user_string(abi_ulong guest_addr) |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 676 | { |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 677 | abi_long len; |
| 678 | len = target_strlen(guest_addr); |
| 679 | if (len < 0) |
| 680 | return NULL; |
| 681 | return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1); |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 682 | } |
| 683 | |
Stefan Weil | 41d1af4 | 2013-09-12 19:57:41 +0200 | [diff] [blame] | 684 | /* Helper macros for locking/unlocking a target struct. */ |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 685 | #define lock_user_struct(type, host_ptr, guest_addr, copy) \ |
| 686 | (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy)) |
| 687 | #define unlock_user_struct(host_ptr, guest_addr, copy) \ |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 688 | unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) |
| 689 | |
pbrook | c8a706f | 2008-06-02 16:16:42 +0000 | [diff] [blame] | 690 | #include <pthread.h> |
pbrook | c8a706f | 2008-06-02 16:16:42 +0000 | [diff] [blame] | 691 | |
Philippe Mathieu-Daudé | 1129dd7 | 2018-06-04 12:37:21 -0300 | [diff] [blame] | 692 | static inline int is_error(abi_long ret) |
| 693 | { |
| 694 | return (abi_ulong)ret >= (abi_ulong)(-4096); |
| 695 | } |
| 696 | |
Filip Bozuta | f4d92c5 | 2020-06-19 14:33:31 +0200 | [diff] [blame] | 697 | #if TARGET_ABI_BITS == 32 |
| 698 | static inline uint64_t target_offset64(uint32_t word0, uint32_t word1) |
| 699 | { |
| 700 | #ifdef TARGET_WORDS_BIGENDIAN |
| 701 | return ((uint64_t)word0 << 32) | word1; |
| 702 | #else |
| 703 | return ((uint64_t)word1 << 32) | word0; |
| 704 | #endif |
| 705 | } |
| 706 | #else /* TARGET_ABI_BITS == 32 */ |
| 707 | static inline uint64_t target_offset64(uint64_t word0, uint64_t word1) |
| 708 | { |
| 709 | return word0; |
| 710 | } |
| 711 | #endif /* TARGET_ABI_BITS != 32 */ |
| 712 | |
Filip Bozuta | 888468d | 2020-07-23 23:02:33 +0200 | [diff] [blame] | 713 | void print_termios(void *arg); |
Filip Bozuta | 7c89f34 | 2020-08-11 18:45:50 +0200 | [diff] [blame] | 714 | |
| 715 | /* ARM EABI and MIPS expect 64bit types aligned even on pairs or registers */ |
| 716 | #ifdef TARGET_ARM |
| 717 | static inline int regpairs_aligned(void *cpu_env, int num) |
| 718 | { |
| 719 | return ((((CPUARMState *)cpu_env)->eabi) == 1) ; |
| 720 | } |
| 721 | #elif defined(TARGET_MIPS) && (TARGET_ABI_BITS == 32) |
| 722 | static inline int regpairs_aligned(void *cpu_env, int num) { return 1; } |
| 723 | #elif defined(TARGET_PPC) && !defined(TARGET_PPC64) |
| 724 | /* |
| 725 | * SysV AVI for PPC32 expects 64bit parameters to be passed on odd/even pairs |
| 726 | * of registers which translates to the same as ARM/MIPS, because we start with |
| 727 | * r3 as arg1 |
| 728 | */ |
| 729 | static inline int regpairs_aligned(void *cpu_env, int num) { return 1; } |
| 730 | #elif defined(TARGET_SH4) |
| 731 | /* SH4 doesn't align register pairs, except for p{read,write}64 */ |
| 732 | static inline int regpairs_aligned(void *cpu_env, int num) |
| 733 | { |
| 734 | switch (num) { |
| 735 | case TARGET_NR_pread64: |
| 736 | case TARGET_NR_pwrite64: |
| 737 | return 1; |
| 738 | |
| 739 | default: |
| 740 | return 0; |
| 741 | } |
| 742 | } |
| 743 | #elif defined(TARGET_XTENSA) |
| 744 | static inline int regpairs_aligned(void *cpu_env, int num) { return 1; } |
| 745 | #else |
| 746 | static inline int regpairs_aligned(void *cpu_env, int num) { return 0; } |
| 747 | #endif |
| 748 | |
Alex Bennée | 708b6a6 | 2018-06-22 17:09:10 +0100 | [diff] [blame] | 749 | /** |
| 750 | * preexit_cleanup: housekeeping before the guest exits |
| 751 | * |
| 752 | * env: the CPU state |
| 753 | * code: the exit code |
| 754 | */ |
| 755 | void preexit_cleanup(CPUArchState *env, int code); |
| 756 | |
Peter Maydell | dfeab06 | 2013-07-16 18:44:52 +0100 | [diff] [blame] | 757 | /* Include target-specific struct and function definitions; |
| 758 | * they may need access to the target-independent structures |
| 759 | * above, so include them last. |
| 760 | */ |
| 761 | #include "target_cpu.h" |
Petar Jovanovic | 55a2b16 | 2013-10-30 14:46:31 +0100 | [diff] [blame] | 762 | #include "target_structs.h" |
Peter Maydell | dfeab06 | 2013-07-16 18:44:52 +0100 | [diff] [blame] | 763 | |
bellard | e88de09 | 2005-02-07 12:35:39 +0000 | [diff] [blame] | 764 | #endif /* QEMU_H */ |