bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 1 | /* |
Keith Packard | 0bb446d | 2021-01-08 22:42:49 +0000 | [diff] [blame] | 2 | * Semihosting support for systems modeled on the Arm "Angel" |
Keith Packard | a10b9d9 | 2021-01-08 22:42:52 +0000 | [diff] [blame] | 3 | * semihosting syscalls design. This includes Arm and RISC-V processors |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 4 | * |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 5 | * Copyright (c) 2005, 2007 CodeSourcery. |
Alex Bennée | 4cb28db | 2019-05-14 12:08:39 +0100 | [diff] [blame] | 6 | * Copyright (c) 2019 Linaro |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 7 | * Written by Paul Brook. |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 8 | * |
Keith Packard | 0bb446d | 2021-01-08 22:42:49 +0000 | [diff] [blame] | 9 | * Copyright © 2020 by Keith Packard <keithp@keithp.com> |
| 10 | * Adapted for systems other than ARM, including RISC-V, by Keith Packard |
| 11 | * |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
Blue Swirl | 8167ee8 | 2009-07-16 20:47:01 +0000 | [diff] [blame] | 23 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
Alex Bennée | 4cb28db | 2019-05-14 12:08:39 +0100 | [diff] [blame] | 24 | * |
| 25 | * ARM Semihosting is documented in: |
| 26 | * Semihosting for AArch32 and AArch64 Release 2.0 |
| 27 | * https://static.docs.arm.com/100863/0200/semihosting.pdf |
Keith Packard | a10b9d9 | 2021-01-08 22:42:52 +0000 | [diff] [blame] | 28 | * |
| 29 | * RISC-V Semihosting is documented in: |
| 30 | * RISC-V Semihosting |
| 31 | * https://github.com/riscv/riscv-semihosting-spec/blob/main/riscv-semihosting-spec.adoc |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 32 | */ |
| 33 | |
Peter Maydell | 74c21bd | 2015-12-07 16:23:44 +0000 | [diff] [blame] | 34 | #include "qemu/osdep.h" |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 35 | |
Philippe Mathieu-Daudé | 6b5fe13 | 2021-03-05 13:54:49 +0000 | [diff] [blame] | 36 | #include "semihosting/semihost.h" |
| 37 | #include "semihosting/console.h" |
| 38 | #include "semihosting/common-semi.h" |
Keith Packard | 4d83403 | 2021-01-08 22:42:54 +0000 | [diff] [blame] | 39 | #include "qemu/timer.h" |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 40 | #ifdef CONFIG_USER_ONLY |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 41 | #include "qemu.h" |
| 42 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 43 | #define COMMON_SEMI_HEAP_SIZE (128 * 1024 * 1024) |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 44 | #else |
Paolo Bonzini | 022c62c | 2012-12-17 18:19:49 +0100 | [diff] [blame] | 45 | #include "exec/gdbstub.h" |
Veronia Bahaa | f348b6d | 2016-03-20 19:16:19 +0200 | [diff] [blame] | 46 | #include "qemu/cutils.h" |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 47 | #ifdef TARGET_ARM |
Peter Maydell | 6951595 | 2020-11-19 09:23:46 +0000 | [diff] [blame] | 48 | #include "hw/arm/boot.h" |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 49 | #endif |
Paolo Bonzini | 6e504a9 | 2020-10-28 06:18:20 -0400 | [diff] [blame] | 50 | #include "hw/boards.h" |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 51 | #endif |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 52 | |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 53 | #define TARGET_SYS_OPEN 0x01 |
| 54 | #define TARGET_SYS_CLOSE 0x02 |
| 55 | #define TARGET_SYS_WRITEC 0x03 |
| 56 | #define TARGET_SYS_WRITE0 0x04 |
| 57 | #define TARGET_SYS_WRITE 0x05 |
| 58 | #define TARGET_SYS_READ 0x06 |
| 59 | #define TARGET_SYS_READC 0x07 |
Keith Packard | 767ba04 | 2021-01-08 22:42:56 +0000 | [diff] [blame] | 60 | #define TARGET_SYS_ISERROR 0x08 |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 61 | #define TARGET_SYS_ISTTY 0x09 |
| 62 | #define TARGET_SYS_SEEK 0x0a |
| 63 | #define TARGET_SYS_FLEN 0x0c |
| 64 | #define TARGET_SYS_TMPNAM 0x0d |
| 65 | #define TARGET_SYS_REMOVE 0x0e |
| 66 | #define TARGET_SYS_RENAME 0x0f |
| 67 | #define TARGET_SYS_CLOCK 0x10 |
| 68 | #define TARGET_SYS_TIME 0x11 |
| 69 | #define TARGET_SYS_SYSTEM 0x12 |
| 70 | #define TARGET_SYS_ERRNO 0x13 |
| 71 | #define TARGET_SYS_GET_CMDLINE 0x15 |
| 72 | #define TARGET_SYS_HEAPINFO 0x16 |
| 73 | #define TARGET_SYS_EXIT 0x18 |
Peter Maydell | e9ebfbf | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 74 | #define TARGET_SYS_SYNCCACHE 0x19 |
Peter Maydell | 22a43bb | 2019-09-16 15:15:43 +0100 | [diff] [blame] | 75 | #define TARGET_SYS_EXIT_EXTENDED 0x20 |
Keith Packard | 4d83403 | 2021-01-08 22:42:54 +0000 | [diff] [blame] | 76 | #define TARGET_SYS_ELAPSED 0x30 |
| 77 | #define TARGET_SYS_TICKFREQ 0x31 |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 78 | |
Liviu Ionescu | 1ecc3a2 | 2014-12-11 12:07:48 +0000 | [diff] [blame] | 79 | /* ADP_Stopped_ApplicationExit is used for exit(0), |
| 80 | * anything else is implemented as exit(1) */ |
| 81 | #define ADP_Stopped_ApplicationExit (0x20026) |
| 82 | |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 83 | #ifndef O_BINARY |
| 84 | #define O_BINARY 0 |
| 85 | #endif |
| 86 | |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 87 | #define GDB_O_RDONLY 0x000 |
| 88 | #define GDB_O_WRONLY 0x001 |
| 89 | #define GDB_O_RDWR 0x002 |
| 90 | #define GDB_O_APPEND 0x008 |
| 91 | #define GDB_O_CREAT 0x200 |
| 92 | #define GDB_O_TRUNC 0x400 |
| 93 | #define GDB_O_BINARY 0 |
| 94 | |
| 95 | static int gdb_open_modeflags[12] = { |
| 96 | GDB_O_RDONLY, |
| 97 | GDB_O_RDONLY | GDB_O_BINARY, |
| 98 | GDB_O_RDWR, |
| 99 | GDB_O_RDWR | GDB_O_BINARY, |
| 100 | GDB_O_WRONLY | GDB_O_CREAT | GDB_O_TRUNC, |
| 101 | GDB_O_WRONLY | GDB_O_CREAT | GDB_O_TRUNC | GDB_O_BINARY, |
| 102 | GDB_O_RDWR | GDB_O_CREAT | GDB_O_TRUNC, |
| 103 | GDB_O_RDWR | GDB_O_CREAT | GDB_O_TRUNC | GDB_O_BINARY, |
| 104 | GDB_O_WRONLY | GDB_O_CREAT | GDB_O_APPEND, |
| 105 | GDB_O_WRONLY | GDB_O_CREAT | GDB_O_APPEND | GDB_O_BINARY, |
| 106 | GDB_O_RDWR | GDB_O_CREAT | GDB_O_APPEND, |
| 107 | GDB_O_RDWR | GDB_O_CREAT | GDB_O_APPEND | GDB_O_BINARY |
| 108 | }; |
| 109 | |
| 110 | static int open_modeflags[12] = { |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 111 | O_RDONLY, |
| 112 | O_RDONLY | O_BINARY, |
| 113 | O_RDWR, |
| 114 | O_RDWR | O_BINARY, |
| 115 | O_WRONLY | O_CREAT | O_TRUNC, |
| 116 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
| 117 | O_RDWR | O_CREAT | O_TRUNC, |
| 118 | O_RDWR | O_CREAT | O_TRUNC | O_BINARY, |
| 119 | O_WRONLY | O_CREAT | O_APPEND, |
| 120 | O_WRONLY | O_CREAT | O_APPEND | O_BINARY, |
| 121 | O_RDWR | O_CREAT | O_APPEND, |
| 122 | O_RDWR | O_CREAT | O_APPEND | O_BINARY |
| 123 | }; |
| 124 | |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 125 | typedef enum GuestFDType { |
| 126 | GuestFDUnused = 0, |
| 127 | GuestFDHost = 1, |
Peter Maydell | 263eb62 | 2019-09-16 15:15:36 +0100 | [diff] [blame] | 128 | GuestFDGDB = 2, |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 129 | GuestFDFeatureFile = 3, |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 130 | } GuestFDType; |
| 131 | |
| 132 | /* |
| 133 | * Guest file descriptors are integer indexes into an array of |
| 134 | * these structures (we will dynamically resize as necessary). |
| 135 | */ |
| 136 | typedef struct GuestFD { |
| 137 | GuestFDType type; |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 138 | union { |
| 139 | int hostfd; |
| 140 | target_ulong featurefile_offset; |
| 141 | }; |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 142 | } GuestFD; |
| 143 | |
| 144 | static GArray *guestfd_array; |
| 145 | |
Keith Packard | 095f8c0 | 2021-01-08 22:42:51 +0000 | [diff] [blame] | 146 | #ifndef CONFIG_USER_ONLY |
| 147 | #include "exec/address-spaces.h" |
| 148 | /* |
| 149 | * Find the base of a RAM region containing the specified address |
| 150 | */ |
| 151 | static inline hwaddr |
| 152 | common_semi_find_region_base(hwaddr addr) |
| 153 | { |
| 154 | MemoryRegion *subregion; |
| 155 | |
| 156 | /* |
| 157 | * Find the chunk of R/W memory containing the address. This is |
| 158 | * used for the SYS_HEAPINFO semihosting call, which should |
| 159 | * probably be using information from the loaded application. |
| 160 | */ |
| 161 | QTAILQ_FOREACH(subregion, &get_system_memory()->subregions, |
| 162 | subregions_link) { |
| 163 | if (subregion->ram && !subregion->readonly) { |
| 164 | Int128 top128 = int128_add(int128_make64(subregion->addr), |
| 165 | subregion->size); |
| 166 | Int128 addr128 = int128_make64(addr); |
| 167 | if (subregion->addr <= addr && int128_lt(addr128, top128)) { |
| 168 | return subregion->addr; |
| 169 | } |
| 170 | } |
| 171 | } |
| 172 | return 0; |
| 173 | } |
| 174 | #endif |
| 175 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 176 | #ifdef TARGET_ARM |
| 177 | static inline target_ulong |
| 178 | common_semi_arg(CPUState *cs, int argno) |
| 179 | { |
| 180 | ARMCPU *cpu = ARM_CPU(cs); |
| 181 | CPUARMState *env = &cpu->env; |
| 182 | if (is_a64(env)) { |
| 183 | return env->xregs[argno]; |
| 184 | } else { |
| 185 | return env->regs[argno]; |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | static inline void |
| 190 | common_semi_set_ret(CPUState *cs, target_ulong ret) |
| 191 | { |
| 192 | ARMCPU *cpu = ARM_CPU(cs); |
| 193 | CPUARMState *env = &cpu->env; |
| 194 | if (is_a64(env)) { |
| 195 | env->xregs[0] = ret; |
| 196 | } else { |
| 197 | env->regs[0] = ret; |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | static inline bool |
| 202 | common_semi_sys_exit_extended(CPUState *cs, int nr) |
| 203 | { |
| 204 | return (nr == TARGET_SYS_EXIT_EXTENDED || is_a64(cs->env_ptr)); |
| 205 | } |
| 206 | |
| 207 | #ifndef CONFIG_USER_ONLY |
| 208 | #include "hw/arm/boot.h" |
| 209 | static inline target_ulong |
| 210 | common_semi_rambase(CPUState *cs) |
| 211 | { |
| 212 | CPUArchState *env = cs->env_ptr; |
| 213 | const struct arm_boot_info *info = env->boot_info; |
Keith Packard | 095f8c0 | 2021-01-08 22:42:51 +0000 | [diff] [blame] | 214 | target_ulong sp; |
| 215 | |
| 216 | if (info) { |
| 217 | return info->loader_start; |
| 218 | } |
| 219 | |
| 220 | if (is_a64(env)) { |
| 221 | sp = env->xregs[31]; |
| 222 | } else { |
| 223 | sp = env->regs[13]; |
| 224 | } |
| 225 | return common_semi_find_region_base(sp); |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 226 | } |
| 227 | #endif |
| 228 | |
| 229 | #endif /* TARGET_ARM */ |
| 230 | |
Keith Packard | a10b9d9 | 2021-01-08 22:42:52 +0000 | [diff] [blame] | 231 | #ifdef TARGET_RISCV |
| 232 | static inline target_ulong |
| 233 | common_semi_arg(CPUState *cs, int argno) |
| 234 | { |
| 235 | RISCVCPU *cpu = RISCV_CPU(cs); |
| 236 | CPURISCVState *env = &cpu->env; |
| 237 | return env->gpr[xA0 + argno]; |
| 238 | } |
| 239 | |
| 240 | static inline void |
| 241 | common_semi_set_ret(CPUState *cs, target_ulong ret) |
| 242 | { |
| 243 | RISCVCPU *cpu = RISCV_CPU(cs); |
| 244 | CPURISCVState *env = &cpu->env; |
| 245 | env->gpr[xA0] = ret; |
| 246 | } |
| 247 | |
| 248 | static inline bool |
| 249 | common_semi_sys_exit_extended(CPUState *cs, int nr) |
| 250 | { |
| 251 | return (nr == TARGET_SYS_EXIT_EXTENDED || sizeof(target_ulong) == 8); |
| 252 | } |
| 253 | |
| 254 | #ifndef CONFIG_USER_ONLY |
| 255 | |
| 256 | static inline target_ulong |
| 257 | common_semi_rambase(CPUState *cs) |
| 258 | { |
| 259 | RISCVCPU *cpu = RISCV_CPU(cs); |
| 260 | CPURISCVState *env = &cpu->env; |
| 261 | return common_semi_find_region_base(env->gpr[xSP]); |
| 262 | } |
| 263 | #endif |
| 264 | |
| 265 | #endif |
| 266 | |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 267 | /* |
| 268 | * Allocate a new guest file descriptor and return it; if we |
| 269 | * couldn't allocate a new fd then return -1. |
| 270 | * This is a fairly simplistic implementation because we don't |
| 271 | * expect that most semihosting guest programs will make very |
| 272 | * heavy use of opening and closing fds. |
| 273 | */ |
| 274 | static int alloc_guestfd(void) |
| 275 | { |
| 276 | guint i; |
| 277 | |
| 278 | if (!guestfd_array) { |
| 279 | /* New entries zero-initialized, i.e. type GuestFDUnused */ |
| 280 | guestfd_array = g_array_new(FALSE, TRUE, sizeof(GuestFD)); |
| 281 | } |
| 282 | |
Masahiro Yamada | 21bf9b0 | 2020-01-17 14:09:30 +0000 | [diff] [blame] | 283 | /* SYS_OPEN should return nonzero handle on success. Start guestfd from 1 */ |
| 284 | for (i = 1; i < guestfd_array->len; i++) { |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 285 | GuestFD *gf = &g_array_index(guestfd_array, GuestFD, i); |
| 286 | |
| 287 | if (gf->type == GuestFDUnused) { |
| 288 | return i; |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | /* All elements already in use: expand the array */ |
| 293 | g_array_set_size(guestfd_array, i + 1); |
| 294 | return i; |
| 295 | } |
| 296 | |
| 297 | /* |
| 298 | * Look up the guestfd in the data structure; return NULL |
| 299 | * for out of bounds, but don't check whether the slot is unused. |
| 300 | * This is used internally by the other guestfd functions. |
| 301 | */ |
| 302 | static GuestFD *do_get_guestfd(int guestfd) |
| 303 | { |
| 304 | if (!guestfd_array) { |
| 305 | return NULL; |
| 306 | } |
| 307 | |
Masahiro Yamada | 21bf9b0 | 2020-01-17 14:09:30 +0000 | [diff] [blame] | 308 | if (guestfd <= 0 || guestfd >= guestfd_array->len) { |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 309 | return NULL; |
| 310 | } |
| 311 | |
| 312 | return &g_array_index(guestfd_array, GuestFD, guestfd); |
| 313 | } |
| 314 | |
| 315 | /* |
| 316 | * Associate the specified guest fd (which must have been |
| 317 | * allocated via alloc_fd() and not previously used) with |
Peter Maydell | 263eb62 | 2019-09-16 15:15:36 +0100 | [diff] [blame] | 318 | * the specified host/gdb fd. |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 319 | */ |
| 320 | static void associate_guestfd(int guestfd, int hostfd) |
| 321 | { |
| 322 | GuestFD *gf = do_get_guestfd(guestfd); |
| 323 | |
| 324 | assert(gf); |
Peter Maydell | 263eb62 | 2019-09-16 15:15:36 +0100 | [diff] [blame] | 325 | gf->type = use_gdb_syscalls() ? GuestFDGDB : GuestFDHost; |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 326 | gf->hostfd = hostfd; |
| 327 | } |
| 328 | |
| 329 | /* |
| 330 | * Deallocate the specified guest file descriptor. This doesn't |
| 331 | * close the host fd, it merely undoes the work of alloc_fd(). |
| 332 | */ |
| 333 | static void dealloc_guestfd(int guestfd) |
| 334 | { |
| 335 | GuestFD *gf = do_get_guestfd(guestfd); |
| 336 | |
| 337 | assert(gf); |
| 338 | gf->type = GuestFDUnused; |
| 339 | } |
| 340 | |
| 341 | /* |
| 342 | * Given a guest file descriptor, get the associated struct. |
| 343 | * If the fd is not valid, return NULL. This is the function |
| 344 | * used by the various semihosting calls to validate a handle |
| 345 | * from the guest. |
| 346 | * Note: calling alloc_guestfd() or dealloc_guestfd() will |
| 347 | * invalidate any GuestFD* obtained by calling this function. |
| 348 | */ |
| 349 | static GuestFD *get_guestfd(int guestfd) |
| 350 | { |
| 351 | GuestFD *gf = do_get_guestfd(guestfd); |
| 352 | |
| 353 | if (!gf || gf->type == GuestFDUnused) { |
| 354 | return NULL; |
| 355 | } |
| 356 | return gf; |
| 357 | } |
| 358 | |
Peter Maydell | 6ed6845 | 2019-09-16 15:15:34 +0100 | [diff] [blame] | 359 | /* |
| 360 | * The semihosting API has no concept of its errno being thread-safe, |
| 361 | * as the API design predates SMP CPUs and was intended as a simple |
| 362 | * real-hardware set of debug functionality. For QEMU, we make the |
| 363 | * errno be per-thread in linux-user mode; in softmmu it is a simple |
| 364 | * global, and we assume that the guest takes care of avoiding any races. |
| 365 | */ |
| 366 | #ifndef CONFIG_USER_ONLY |
Peter Maydell | 1b00382 | 2019-09-16 15:15:30 +0100 | [diff] [blame] | 367 | static target_ulong syscall_err; |
| 368 | |
Peter Maydell | 6ed6845 | 2019-09-16 15:15:34 +0100 | [diff] [blame] | 369 | #include "exec/softmmu-semi.h" |
| 370 | #endif |
| 371 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 372 | static inline uint32_t set_swi_errno(CPUState *cs, uint32_t code) |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 373 | { |
Peter Maydell | 1b00382 | 2019-09-16 15:15:30 +0100 | [diff] [blame] | 374 | if (code == (uint32_t)-1) { |
Peter Maydell | 6ed6845 | 2019-09-16 15:15:34 +0100 | [diff] [blame] | 375 | #ifdef CONFIG_USER_ONLY |
Peter Maydell | 6ed6845 | 2019-09-16 15:15:34 +0100 | [diff] [blame] | 376 | TaskState *ts = cs->opaque; |
| 377 | |
| 378 | ts->swi_errno = errno; |
| 379 | #else |
Peter Maydell | 1b00382 | 2019-09-16 15:15:30 +0100 | [diff] [blame] | 380 | syscall_err = errno; |
Peter Maydell | 6ed6845 | 2019-09-16 15:15:34 +0100 | [diff] [blame] | 381 | #endif |
Peter Maydell | 1b00382 | 2019-09-16 15:15:30 +0100 | [diff] [blame] | 382 | } |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 383 | return code; |
| 384 | } |
| 385 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 386 | static inline uint32_t get_swi_errno(CPUState *cs) |
Peter Maydell | 6ed6845 | 2019-09-16 15:15:34 +0100 | [diff] [blame] | 387 | { |
| 388 | #ifdef CONFIG_USER_ONLY |
Peter Maydell | 6ed6845 | 2019-09-16 15:15:34 +0100 | [diff] [blame] | 389 | TaskState *ts = cs->opaque; |
| 390 | |
| 391 | return ts->swi_errno; |
| 392 | #else |
| 393 | return syscall_err; |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 394 | #endif |
Peter Maydell | 6ed6845 | 2019-09-16 15:15:34 +0100 | [diff] [blame] | 395 | } |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 396 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 397 | static target_ulong common_semi_syscall_len; |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 398 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 399 | static void common_semi_cb(CPUState *cs, target_ulong ret, target_ulong err) |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 400 | { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 401 | target_ulong reg0 = common_semi_arg(cs, 0); |
pbrook | 33d9cc8 | 2007-06-09 14:44:00 +0000 | [diff] [blame] | 402 | |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 403 | if (ret == (target_ulong)-1) { |
Peter Maydell | 939f5b4 | 2019-09-16 15:15:35 +0100 | [diff] [blame] | 404 | errno = err; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 405 | set_swi_errno(cs, -1); |
Peter Maydell | bb19cbc | 2015-09-07 10:39:27 +0100 | [diff] [blame] | 406 | reg0 = ret; |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 407 | } else { |
| 408 | /* Fixup syscalls that use nonstardard return conventions. */ |
Peter Maydell | bb19cbc | 2015-09-07 10:39:27 +0100 | [diff] [blame] | 409 | switch (reg0) { |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 410 | case TARGET_SYS_WRITE: |
| 411 | case TARGET_SYS_READ: |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 412 | reg0 = common_semi_syscall_len - ret; |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 413 | break; |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 414 | case TARGET_SYS_SEEK: |
Peter Maydell | bb19cbc | 2015-09-07 10:39:27 +0100 | [diff] [blame] | 415 | reg0 = 0; |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 416 | break; |
| 417 | default: |
Peter Maydell | bb19cbc | 2015-09-07 10:39:27 +0100 | [diff] [blame] | 418 | reg0 = ret; |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 419 | break; |
| 420 | } |
| 421 | } |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 422 | common_semi_set_ret(cs, reg0); |
Peter Maydell | faacc04 | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 423 | } |
| 424 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 425 | static target_ulong common_semi_flen_buf(CPUState *cs) |
Peter Maydell | faacc04 | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 426 | { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 427 | target_ulong sp; |
| 428 | #ifdef TARGET_ARM |
Peter Maydell | faacc04 | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 429 | /* Return an address in target memory of 64 bytes where the remote |
| 430 | * gdb should write its stat struct. (The format of this structure |
| 431 | * is defined by GDB's remote protocol and is not target-specific.) |
| 432 | * We put this on the guest's stack just below SP. |
| 433 | */ |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 434 | ARMCPU *cpu = ARM_CPU(cs); |
Peter Maydell | faacc04 | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 435 | CPUARMState *env = &cpu->env; |
Peter Maydell | faacc04 | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 436 | |
| 437 | if (is_a64(env)) { |
| 438 | sp = env->xregs[31]; |
| 439 | } else { |
| 440 | sp = env->regs[13]; |
| 441 | } |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 442 | #endif |
Keith Packard | a10b9d9 | 2021-01-08 22:42:52 +0000 | [diff] [blame] | 443 | #ifdef TARGET_RISCV |
| 444 | RISCVCPU *cpu = RISCV_CPU(cs); |
| 445 | CPURISCVState *env = &cpu->env; |
| 446 | |
| 447 | sp = env->gpr[xSP]; |
| 448 | #endif |
Peter Maydell | faacc04 | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 449 | |
| 450 | return sp - 64; |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 451 | } |
| 452 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 453 | static void |
| 454 | common_semi_flen_cb(CPUState *cs, target_ulong ret, target_ulong err) |
pbrook | 33d9cc8 | 2007-06-09 14:44:00 +0000 | [diff] [blame] | 455 | { |
| 456 | /* The size is always stored in big-endian order, extract |
| 457 | the value. We assume the size always fit in 32 bits. */ |
| 458 | uint32_t size; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 459 | cpu_memory_rw_debug(cs, common_semi_flen_buf(cs) + 32, |
| 460 | (uint8_t *)&size, 4, 0); |
Peter Maydell | faacc04 | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 461 | size = be32_to_cpu(size); |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 462 | common_semi_set_ret(cs, size); |
Peter Maydell | 939f5b4 | 2019-09-16 15:15:35 +0100 | [diff] [blame] | 463 | errno = err; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 464 | set_swi_errno(cs, -1); |
pbrook | 33d9cc8 | 2007-06-09 14:44:00 +0000 | [diff] [blame] | 465 | } |
| 466 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 467 | static int common_semi_open_guestfd; |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 468 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 469 | static void |
| 470 | common_semi_open_cb(CPUState *cs, target_ulong ret, target_ulong err) |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 471 | { |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 472 | if (ret == (target_ulong)-1) { |
Peter Maydell | 939f5b4 | 2019-09-16 15:15:35 +0100 | [diff] [blame] | 473 | errno = err; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 474 | set_swi_errno(cs, -1); |
| 475 | dealloc_guestfd(common_semi_open_guestfd); |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 476 | } else { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 477 | associate_guestfd(common_semi_open_guestfd, ret); |
| 478 | ret = common_semi_open_guestfd; |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 479 | } |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 480 | common_semi_set_ret(cs, ret); |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 481 | } |
| 482 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 483 | static target_ulong |
| 484 | common_semi_gdb_syscall(CPUState *cs, gdb_syscall_complete_cb cb, |
| 485 | const char *fmt, ...) |
Peter Maydell | bb19cbc | 2015-09-07 10:39:27 +0100 | [diff] [blame] | 486 | { |
| 487 | va_list va; |
Peter Maydell | bb19cbc | 2015-09-07 10:39:27 +0100 | [diff] [blame] | 488 | |
| 489 | va_start(va, fmt); |
| 490 | gdb_do_syscallv(cb, fmt, va); |
| 491 | va_end(va); |
| 492 | |
Peter Maydell | f8ad230 | 2019-09-16 15:15:32 +0100 | [diff] [blame] | 493 | /* |
| 494 | * FIXME: in softmmu mode, the gdbstub will schedule our callback |
| 495 | * to occur, but will not actually call it to complete the syscall |
| 496 | * until after this function has returned and we are back in the |
| 497 | * CPU main loop. Therefore callers to this function must not |
| 498 | * do anything with its return value, because it is not necessarily |
| 499 | * the result of the syscall, but could just be the old value of X0. |
| 500 | * The only thing safe to do with this is that the callers of |
Keith Packard | 0bb446d | 2021-01-08 22:42:49 +0000 | [diff] [blame] | 501 | * do_common_semihosting() will write it straight back into X0. |
Peter Maydell | f8ad230 | 2019-09-16 15:15:32 +0100 | [diff] [blame] | 502 | * (In linux-user mode, the callback will have happened before |
| 503 | * gdb_do_syscallv() returns.) |
| 504 | * |
| 505 | * We should tidy this up so neither this function nor |
Keith Packard | 0bb446d | 2021-01-08 22:42:49 +0000 | [diff] [blame] | 506 | * do_common_semihosting() return a value, so the mistake of |
Peter Maydell | f8ad230 | 2019-09-16 15:15:32 +0100 | [diff] [blame] | 507 | * doing something with the return value is not possible to make. |
Peter Maydell | bb19cbc | 2015-09-07 10:39:27 +0100 | [diff] [blame] | 508 | */ |
| 509 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 510 | return common_semi_arg(cs, 0); |
Peter Maydell | bb19cbc | 2015-09-07 10:39:27 +0100 | [diff] [blame] | 511 | } |
| 512 | |
Peter Maydell | 263eb62 | 2019-09-16 15:15:36 +0100 | [diff] [blame] | 513 | /* |
| 514 | * Types for functions implementing various semihosting calls |
| 515 | * for specific types of guest file descriptor. These must all |
| 516 | * do the work and return the required return value for the guest, |
| 517 | * setting the guest errno if appropriate. |
| 518 | */ |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 519 | typedef uint32_t sys_closefn(CPUState *cs, GuestFD *gf); |
| 520 | typedef uint32_t sys_writefn(CPUState *cs, GuestFD *gf, |
Peter Maydell | 52c8a16 | 2019-09-16 15:15:37 +0100 | [diff] [blame] | 521 | target_ulong buf, uint32_t len); |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 522 | typedef uint32_t sys_readfn(CPUState *cs, GuestFD *gf, |
Peter Maydell | 2c3a09a | 2019-09-16 15:15:38 +0100 | [diff] [blame] | 523 | target_ulong buf, uint32_t len); |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 524 | typedef uint32_t sys_isattyfn(CPUState *cs, GuestFD *gf); |
| 525 | typedef uint32_t sys_seekfn(CPUState *cs, GuestFD *gf, |
Peter Maydell | 45e88ff | 2019-09-16 15:15:40 +0100 | [diff] [blame] | 526 | target_ulong offset); |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 527 | typedef uint32_t sys_flenfn(CPUState *cs, GuestFD *gf); |
Peter Maydell | 263eb62 | 2019-09-16 15:15:36 +0100 | [diff] [blame] | 528 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 529 | static uint32_t host_closefn(CPUState *cs, GuestFD *gf) |
Peter Maydell | 263eb62 | 2019-09-16 15:15:36 +0100 | [diff] [blame] | 530 | { |
Peter Maydell | 16ab12a | 2020-01-30 16:02:01 +0000 | [diff] [blame] | 531 | /* |
| 532 | * Only close the underlying host fd if it's one we opened on behalf |
| 533 | * of the guest in SYS_OPEN. |
| 534 | */ |
| 535 | if (gf->hostfd == STDIN_FILENO || |
| 536 | gf->hostfd == STDOUT_FILENO || |
| 537 | gf->hostfd == STDERR_FILENO) { |
| 538 | return 0; |
| 539 | } |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 540 | return set_swi_errno(cs, close(gf->hostfd)); |
Peter Maydell | 263eb62 | 2019-09-16 15:15:36 +0100 | [diff] [blame] | 541 | } |
| 542 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 543 | static uint32_t host_writefn(CPUState *cs, GuestFD *gf, |
Peter Maydell | 52c8a16 | 2019-09-16 15:15:37 +0100 | [diff] [blame] | 544 | target_ulong buf, uint32_t len) |
| 545 | { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 546 | CPUArchState *env = cs->env_ptr; |
Peter Maydell | 52c8a16 | 2019-09-16 15:15:37 +0100 | [diff] [blame] | 547 | uint32_t ret; |
Peter Maydell | 52c8a16 | 2019-09-16 15:15:37 +0100 | [diff] [blame] | 548 | char *s = lock_user(VERIFY_READ, buf, len, 1); |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 549 | (void) env; /* Used in arm softmmu lock_user implicitly */ |
Peter Maydell | 52c8a16 | 2019-09-16 15:15:37 +0100 | [diff] [blame] | 550 | if (!s) { |
| 551 | /* Return bytes not written on error */ |
| 552 | return len; |
| 553 | } |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 554 | ret = set_swi_errno(cs, write(gf->hostfd, s, len)); |
Peter Maydell | 52c8a16 | 2019-09-16 15:15:37 +0100 | [diff] [blame] | 555 | unlock_user(s, buf, 0); |
| 556 | if (ret == (uint32_t)-1) { |
| 557 | ret = 0; |
| 558 | } |
| 559 | /* Return bytes not written */ |
| 560 | return len - ret; |
| 561 | } |
| 562 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 563 | static uint32_t host_readfn(CPUState *cs, GuestFD *gf, |
Peter Maydell | 2c3a09a | 2019-09-16 15:15:38 +0100 | [diff] [blame] | 564 | target_ulong buf, uint32_t len) |
| 565 | { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 566 | CPUArchState *env = cs->env_ptr; |
Peter Maydell | 2c3a09a | 2019-09-16 15:15:38 +0100 | [diff] [blame] | 567 | uint32_t ret; |
Peter Maydell | 2c3a09a | 2019-09-16 15:15:38 +0100 | [diff] [blame] | 568 | char *s = lock_user(VERIFY_WRITE, buf, len, 0); |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 569 | (void) env; /* Used in arm softmmu lock_user implicitly */ |
Peter Maydell | 2c3a09a | 2019-09-16 15:15:38 +0100 | [diff] [blame] | 570 | if (!s) { |
| 571 | /* return bytes not read */ |
| 572 | return len; |
| 573 | } |
| 574 | do { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 575 | ret = set_swi_errno(cs, read(gf->hostfd, s, len)); |
Peter Maydell | 2c3a09a | 2019-09-16 15:15:38 +0100 | [diff] [blame] | 576 | } while (ret == -1 && errno == EINTR); |
| 577 | unlock_user(s, buf, len); |
| 578 | if (ret == (uint32_t)-1) { |
| 579 | ret = 0; |
| 580 | } |
| 581 | /* Return bytes not read */ |
| 582 | return len - ret; |
| 583 | } |
| 584 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 585 | static uint32_t host_isattyfn(CPUState *cs, GuestFD *gf) |
Peter Maydell | 0213fa4 | 2019-09-16 15:15:39 +0100 | [diff] [blame] | 586 | { |
| 587 | return isatty(gf->hostfd); |
| 588 | } |
| 589 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 590 | static uint32_t host_seekfn(CPUState *cs, GuestFD *gf, target_ulong offset) |
Peter Maydell | 45e88ff | 2019-09-16 15:15:40 +0100 | [diff] [blame] | 591 | { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 592 | uint32_t ret = set_swi_errno(cs, lseek(gf->hostfd, offset, SEEK_SET)); |
Peter Maydell | 45e88ff | 2019-09-16 15:15:40 +0100 | [diff] [blame] | 593 | if (ret == (uint32_t)-1) { |
| 594 | return -1; |
| 595 | } |
| 596 | return 0; |
| 597 | } |
| 598 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 599 | static uint32_t host_flenfn(CPUState *cs, GuestFD *gf) |
Peter Maydell | 1631a7b | 2019-09-16 15:15:41 +0100 | [diff] [blame] | 600 | { |
Peter Maydell | 1631a7b | 2019-09-16 15:15:41 +0100 | [diff] [blame] | 601 | struct stat buf; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 602 | uint32_t ret = set_swi_errno(cs, fstat(gf->hostfd, &buf)); |
Peter Maydell | 1631a7b | 2019-09-16 15:15:41 +0100 | [diff] [blame] | 603 | if (ret == (uint32_t)-1) { |
| 604 | return -1; |
| 605 | } |
| 606 | return buf.st_size; |
| 607 | } |
| 608 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 609 | static uint32_t gdb_closefn(CPUState *cs, GuestFD *gf) |
Peter Maydell | 263eb62 | 2019-09-16 15:15:36 +0100 | [diff] [blame] | 610 | { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 611 | return common_semi_gdb_syscall(cs, common_semi_cb, "close,%x", gf->hostfd); |
Peter Maydell | 263eb62 | 2019-09-16 15:15:36 +0100 | [diff] [blame] | 612 | } |
| 613 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 614 | static uint32_t gdb_writefn(CPUState *cs, GuestFD *gf, |
Peter Maydell | 52c8a16 | 2019-09-16 15:15:37 +0100 | [diff] [blame] | 615 | target_ulong buf, uint32_t len) |
| 616 | { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 617 | common_semi_syscall_len = len; |
| 618 | return common_semi_gdb_syscall(cs, common_semi_cb, "write,%x,%x,%x", |
| 619 | gf->hostfd, buf, len); |
Peter Maydell | 52c8a16 | 2019-09-16 15:15:37 +0100 | [diff] [blame] | 620 | } |
| 621 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 622 | static uint32_t gdb_readfn(CPUState *cs, GuestFD *gf, |
Peter Maydell | 2c3a09a | 2019-09-16 15:15:38 +0100 | [diff] [blame] | 623 | target_ulong buf, uint32_t len) |
| 624 | { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 625 | common_semi_syscall_len = len; |
| 626 | return common_semi_gdb_syscall(cs, common_semi_cb, "read,%x,%x,%x", |
| 627 | gf->hostfd, buf, len); |
Peter Maydell | 2c3a09a | 2019-09-16 15:15:38 +0100 | [diff] [blame] | 628 | } |
| 629 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 630 | static uint32_t gdb_isattyfn(CPUState *cs, GuestFD *gf) |
Peter Maydell | 0213fa4 | 2019-09-16 15:15:39 +0100 | [diff] [blame] | 631 | { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 632 | return common_semi_gdb_syscall(cs, common_semi_cb, "isatty,%x", gf->hostfd); |
Peter Maydell | 0213fa4 | 2019-09-16 15:15:39 +0100 | [diff] [blame] | 633 | } |
| 634 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 635 | static uint32_t gdb_seekfn(CPUState *cs, GuestFD *gf, target_ulong offset) |
Peter Maydell | 45e88ff | 2019-09-16 15:15:40 +0100 | [diff] [blame] | 636 | { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 637 | return common_semi_gdb_syscall(cs, common_semi_cb, "lseek,%x,%x,0", |
| 638 | gf->hostfd, offset); |
Peter Maydell | 45e88ff | 2019-09-16 15:15:40 +0100 | [diff] [blame] | 639 | } |
| 640 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 641 | static uint32_t gdb_flenfn(CPUState *cs, GuestFD *gf) |
Peter Maydell | 1631a7b | 2019-09-16 15:15:41 +0100 | [diff] [blame] | 642 | { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 643 | return common_semi_gdb_syscall(cs, common_semi_flen_cb, "fstat,%x,%x", |
| 644 | gf->hostfd, common_semi_flen_buf(cs)); |
Peter Maydell | 1631a7b | 2019-09-16 15:15:41 +0100 | [diff] [blame] | 645 | } |
| 646 | |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 647 | #define SHFB_MAGIC_0 0x53 |
| 648 | #define SHFB_MAGIC_1 0x48 |
| 649 | #define SHFB_MAGIC_2 0x46 |
| 650 | #define SHFB_MAGIC_3 0x42 |
| 651 | |
Peter Maydell | 22a43bb | 2019-09-16 15:15:43 +0100 | [diff] [blame] | 652 | /* Feature bits reportable in feature byte 0 */ |
| 653 | #define SH_EXT_EXIT_EXTENDED (1 << 0) |
Peter Maydell | 6ee1864 | 2019-09-16 15:15:44 +0100 | [diff] [blame] | 654 | #define SH_EXT_STDOUT_STDERR (1 << 1) |
Peter Maydell | 22a43bb | 2019-09-16 15:15:43 +0100 | [diff] [blame] | 655 | |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 656 | static const uint8_t featurefile_data[] = { |
| 657 | SHFB_MAGIC_0, |
| 658 | SHFB_MAGIC_1, |
| 659 | SHFB_MAGIC_2, |
| 660 | SHFB_MAGIC_3, |
Peter Maydell | 6ee1864 | 2019-09-16 15:15:44 +0100 | [diff] [blame] | 661 | SH_EXT_EXIT_EXTENDED | SH_EXT_STDOUT_STDERR, /* Feature byte 0 */ |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 662 | }; |
| 663 | |
| 664 | static void init_featurefile_guestfd(int guestfd) |
| 665 | { |
| 666 | GuestFD *gf = do_get_guestfd(guestfd); |
| 667 | |
| 668 | assert(gf); |
| 669 | gf->type = GuestFDFeatureFile; |
| 670 | gf->featurefile_offset = 0; |
| 671 | } |
| 672 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 673 | static uint32_t featurefile_closefn(CPUState *cs, GuestFD *gf) |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 674 | { |
| 675 | /* Nothing to do */ |
| 676 | return 0; |
| 677 | } |
| 678 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 679 | static uint32_t featurefile_writefn(CPUState *cs, GuestFD *gf, |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 680 | target_ulong buf, uint32_t len) |
| 681 | { |
| 682 | /* This fd can never be open for writing */ |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 683 | |
| 684 | errno = EBADF; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 685 | return set_swi_errno(cs, -1); |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 686 | } |
| 687 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 688 | static uint32_t featurefile_readfn(CPUState *cs, GuestFD *gf, |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 689 | target_ulong buf, uint32_t len) |
| 690 | { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 691 | CPUArchState *env = cs->env_ptr; |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 692 | uint32_t i; |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 693 | char *s; |
| 694 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 695 | (void) env; /* Used in arm softmmu lock_user implicitly */ |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 696 | s = lock_user(VERIFY_WRITE, buf, len, 0); |
| 697 | if (!s) { |
| 698 | return len; |
| 699 | } |
| 700 | |
| 701 | for (i = 0; i < len; i++) { |
| 702 | if (gf->featurefile_offset >= sizeof(featurefile_data)) { |
| 703 | break; |
| 704 | } |
| 705 | s[i] = featurefile_data[gf->featurefile_offset]; |
| 706 | gf->featurefile_offset++; |
| 707 | } |
| 708 | |
| 709 | unlock_user(s, buf, len); |
| 710 | |
| 711 | /* Return number of bytes not read */ |
| 712 | return len - i; |
| 713 | } |
| 714 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 715 | static uint32_t featurefile_isattyfn(CPUState *cs, GuestFD *gf) |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 716 | { |
| 717 | return 0; |
| 718 | } |
| 719 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 720 | static uint32_t featurefile_seekfn(CPUState *cs, GuestFD *gf, |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 721 | target_ulong offset) |
| 722 | { |
| 723 | gf->featurefile_offset = offset; |
| 724 | return 0; |
| 725 | } |
| 726 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 727 | static uint32_t featurefile_flenfn(CPUState *cs, GuestFD *gf) |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 728 | { |
| 729 | return sizeof(featurefile_data); |
| 730 | } |
| 731 | |
Peter Maydell | 263eb62 | 2019-09-16 15:15:36 +0100 | [diff] [blame] | 732 | typedef struct GuestFDFunctions { |
| 733 | sys_closefn *closefn; |
Peter Maydell | 52c8a16 | 2019-09-16 15:15:37 +0100 | [diff] [blame] | 734 | sys_writefn *writefn; |
Peter Maydell | 2c3a09a | 2019-09-16 15:15:38 +0100 | [diff] [blame] | 735 | sys_readfn *readfn; |
Peter Maydell | 0213fa4 | 2019-09-16 15:15:39 +0100 | [diff] [blame] | 736 | sys_isattyfn *isattyfn; |
Peter Maydell | 45e88ff | 2019-09-16 15:15:40 +0100 | [diff] [blame] | 737 | sys_seekfn *seekfn; |
Peter Maydell | 1631a7b | 2019-09-16 15:15:41 +0100 | [diff] [blame] | 738 | sys_flenfn *flenfn; |
Peter Maydell | 263eb62 | 2019-09-16 15:15:36 +0100 | [diff] [blame] | 739 | } GuestFDFunctions; |
| 740 | |
| 741 | static const GuestFDFunctions guestfd_fns[] = { |
| 742 | [GuestFDHost] = { |
| 743 | .closefn = host_closefn, |
Peter Maydell | 52c8a16 | 2019-09-16 15:15:37 +0100 | [diff] [blame] | 744 | .writefn = host_writefn, |
Peter Maydell | 2c3a09a | 2019-09-16 15:15:38 +0100 | [diff] [blame] | 745 | .readfn = host_readfn, |
Peter Maydell | 0213fa4 | 2019-09-16 15:15:39 +0100 | [diff] [blame] | 746 | .isattyfn = host_isattyfn, |
Peter Maydell | 45e88ff | 2019-09-16 15:15:40 +0100 | [diff] [blame] | 747 | .seekfn = host_seekfn, |
Peter Maydell | 1631a7b | 2019-09-16 15:15:41 +0100 | [diff] [blame] | 748 | .flenfn = host_flenfn, |
Peter Maydell | 263eb62 | 2019-09-16 15:15:36 +0100 | [diff] [blame] | 749 | }, |
| 750 | [GuestFDGDB] = { |
| 751 | .closefn = gdb_closefn, |
Peter Maydell | 52c8a16 | 2019-09-16 15:15:37 +0100 | [diff] [blame] | 752 | .writefn = gdb_writefn, |
Peter Maydell | 2c3a09a | 2019-09-16 15:15:38 +0100 | [diff] [blame] | 753 | .readfn = gdb_readfn, |
Peter Maydell | 0213fa4 | 2019-09-16 15:15:39 +0100 | [diff] [blame] | 754 | .isattyfn = gdb_isattyfn, |
Peter Maydell | 45e88ff | 2019-09-16 15:15:40 +0100 | [diff] [blame] | 755 | .seekfn = gdb_seekfn, |
Peter Maydell | 1631a7b | 2019-09-16 15:15:41 +0100 | [diff] [blame] | 756 | .flenfn = gdb_flenfn, |
Peter Maydell | 263eb62 | 2019-09-16 15:15:36 +0100 | [diff] [blame] | 757 | }, |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 758 | [GuestFDFeatureFile] = { |
| 759 | .closefn = featurefile_closefn, |
| 760 | .writefn = featurefile_writefn, |
| 761 | .readfn = featurefile_readfn, |
| 762 | .isattyfn = featurefile_isattyfn, |
| 763 | .seekfn = featurefile_seekfn, |
| 764 | .flenfn = featurefile_flenfn, |
| 765 | }, |
Peter Maydell | 263eb62 | 2019-09-16 15:15:36 +0100 | [diff] [blame] | 766 | }; |
| 767 | |
Alex Bennée | 3960ca5 | 2021-03-23 16:52:52 +0000 | [diff] [blame] | 768 | /* |
| 769 | * Read the input value from the argument block; fail the semihosting |
| 770 | * call if the memory read fails. Eventually we could use a generic |
| 771 | * CPUState helper function here. |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 772 | */ |
Alex Bennée | 3960ca5 | 2021-03-23 16:52:52 +0000 | [diff] [blame] | 773 | static inline bool is_64bit_semihosting(CPUArchState *env) |
| 774 | { |
| 775 | #if defined(TARGET_ARM) |
| 776 | return is_a64(env); |
| 777 | #elif defined(TARGET_RISCV) |
| 778 | return !riscv_cpu_is_32bit(env); |
| 779 | #else |
| 780 | #error un-handled architecture |
| 781 | #endif |
| 782 | } |
| 783 | |
| 784 | |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 785 | #define GET_ARG(n) do { \ |
Alex Bennée | 3960ca5 | 2021-03-23 16:52:52 +0000 | [diff] [blame] | 786 | if (is_64bit_semihosting(env)) { \ |
Peter Maydell | faacc04 | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 787 | if (get_user_u64(arg ## n, args + (n) * 8)) { \ |
Peter Maydell | f7d38cf | 2019-09-16 15:15:31 +0100 | [diff] [blame] | 788 | errno = EFAULT; \ |
Alex Bennée | 3960ca5 | 2021-03-23 16:52:52 +0000 | [diff] [blame] | 789 | return set_swi_errno(cs, -1); \ |
Peter Maydell | faacc04 | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 790 | } \ |
| 791 | } else { \ |
| 792 | if (get_user_u32(arg ## n, args + (n) * 4)) { \ |
Peter Maydell | f7d38cf | 2019-09-16 15:15:31 +0100 | [diff] [blame] | 793 | errno = EFAULT; \ |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 794 | return set_swi_errno(cs, -1); \ |
Peter Maydell | faacc04 | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 795 | } \ |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 796 | } \ |
| 797 | } while (0) |
| 798 | |
Peter Maydell | faacc04 | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 799 | #define SET_ARG(n, val) \ |
Alex Bennée | 3960ca5 | 2021-03-23 16:52:52 +0000 | [diff] [blame] | 800 | (is_64bit_semihosting(env) ? \ |
Peter Maydell | faacc04 | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 801 | put_user_u64(val, args + (n) * 8) : \ |
| 802 | put_user_u32(val, args + (n) * 4)) |
| 803 | |
Keith Packard | a10b9d9 | 2021-01-08 22:42:52 +0000 | [diff] [blame] | 804 | |
Alex Bennée | 4cb28db | 2019-05-14 12:08:39 +0100 | [diff] [blame] | 805 | /* |
| 806 | * Do a semihosting call. |
| 807 | * |
| 808 | * The specification always says that the "return register" either |
| 809 | * returns a specific value or is corrupted, so we don't need to |
| 810 | * report to our caller whether we are returning a value or trying to |
| 811 | * leave the register unchanged. We use 0xdeadbeef as the return value |
| 812 | * when there isn't a defined return value for the call. |
| 813 | */ |
Keith Packard | 0bb446d | 2021-01-08 22:42:49 +0000 | [diff] [blame] | 814 | target_ulong do_common_semihosting(CPUState *cs) |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 815 | { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 816 | CPUArchState *env = cs->env_ptr; |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 817 | target_ulong args; |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 818 | target_ulong arg0, arg1, arg2, arg3; |
Keith Packard | 27e3b10 | 2021-01-08 22:42:55 +0000 | [diff] [blame] | 819 | target_ulong ul_ret; |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 820 | char * s; |
| 821 | int nr; |
| 822 | uint32_t ret; |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 823 | uint32_t len; |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 824 | GuestFD *gf; |
Keith Packard | 4d83403 | 2021-01-08 22:42:54 +0000 | [diff] [blame] | 825 | int64_t elapsed; |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 826 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 827 | (void) env; /* Used implicitly by arm lock_user macro */ |
| 828 | nr = common_semi_arg(cs, 0) & 0xffffffffU; |
| 829 | args = common_semi_arg(cs, 1); |
Peter Maydell | faacc04 | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 830 | |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 831 | switch (nr) { |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 832 | case TARGET_SYS_OPEN: |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 833 | { |
| 834 | int guestfd; |
| 835 | |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 836 | GET_ARG(0); |
| 837 | GET_ARG(1); |
| 838 | GET_ARG(2); |
| 839 | s = lock_user_string(arg0); |
| 840 | if (!s) { |
Peter Maydell | f7d38cf | 2019-09-16 15:15:31 +0100 | [diff] [blame] | 841 | errno = EFAULT; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 842 | return set_swi_errno(cs, -1); |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 843 | } |
| 844 | if (arg1 >= 12) { |
| 845 | unlock_user(s, arg0, 0); |
Peter Maydell | f7d38cf | 2019-09-16 15:15:31 +0100 | [diff] [blame] | 846 | errno = EINVAL; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 847 | return set_swi_errno(cs, -1); |
Jim Meyering | 396bef4 | 2012-08-22 13:55:55 +0200 | [diff] [blame] | 848 | } |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 849 | |
| 850 | guestfd = alloc_guestfd(); |
| 851 | if (guestfd < 0) { |
| 852 | unlock_user(s, arg0, 0); |
| 853 | errno = EMFILE; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 854 | return set_swi_errno(cs, -1); |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 855 | } |
| 856 | |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 857 | if (strcmp(s, ":tt") == 0) { |
Peter Maydell | 6ee1864 | 2019-09-16 15:15:44 +0100 | [diff] [blame] | 858 | int result_fileno; |
| 859 | |
| 860 | /* |
| 861 | * We implement SH_EXT_STDOUT_STDERR, so: |
| 862 | * open for read == stdin |
| 863 | * open for write == stdout |
| 864 | * open for append == stderr |
| 865 | */ |
| 866 | if (arg1 < 4) { |
| 867 | result_fileno = STDIN_FILENO; |
| 868 | } else if (arg1 < 8) { |
| 869 | result_fileno = STDOUT_FILENO; |
| 870 | } else { |
| 871 | result_fileno = STDERR_FILENO; |
| 872 | } |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 873 | associate_guestfd(guestfd, result_fileno); |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 874 | unlock_user(s, arg0, 0); |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 875 | return guestfd; |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 876 | } |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 877 | if (strcmp(s, ":semihosting-features") == 0) { |
| 878 | unlock_user(s, arg0, 0); |
| 879 | /* We must fail opens for modes other than 0 ('r') or 1 ('rb') */ |
| 880 | if (arg1 != 0 && arg1 != 1) { |
| 881 | dealloc_guestfd(guestfd); |
| 882 | errno = EACCES; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 883 | return set_swi_errno(cs, -1); |
Peter Maydell | c46a653 | 2019-09-16 15:15:42 +0100 | [diff] [blame] | 884 | } |
| 885 | init_featurefile_guestfd(guestfd); |
| 886 | return guestfd; |
| 887 | } |
| 888 | |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 889 | if (use_gdb_syscalls()) { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 890 | common_semi_open_guestfd = guestfd; |
| 891 | ret = common_semi_gdb_syscall(cs, common_semi_open_cb, |
| 892 | "open,%s,%x,1a4", arg0, (int)arg2 + 1, |
| 893 | gdb_open_modeflags[arg1]); |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 894 | } else { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 895 | ret = set_swi_errno(cs, open(s, open_modeflags[arg1], 0644)); |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 896 | if (ret == (uint32_t)-1) { |
| 897 | dealloc_guestfd(guestfd); |
| 898 | } else { |
| 899 | associate_guestfd(guestfd, ret); |
| 900 | ret = guestfd; |
| 901 | } |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 902 | } |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 903 | unlock_user(s, arg0, 0); |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 904 | return ret; |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 905 | } |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 906 | case TARGET_SYS_CLOSE: |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 907 | GET_ARG(0); |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 908 | |
| 909 | gf = get_guestfd(arg0); |
| 910 | if (!gf) { |
| 911 | errno = EBADF; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 912 | return set_swi_errno(cs, -1); |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 913 | } |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 914 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 915 | ret = guestfd_fns[gf->type].closefn(cs, gf); |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 916 | dealloc_guestfd(arg0); |
| 917 | return ret; |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 918 | case TARGET_SYS_WRITEC: |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 919 | qemu_semihosting_console_outc(cs->env_ptr, args); |
Alex Bennée | 0dc0772 | 2019-05-14 11:07:15 +0100 | [diff] [blame] | 920 | return 0xdeadbeef; |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 921 | case TARGET_SYS_WRITE0: |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 922 | return qemu_semihosting_console_outs(cs->env_ptr, args); |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 923 | case TARGET_SYS_WRITE: |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 924 | GET_ARG(0); |
| 925 | GET_ARG(1); |
| 926 | GET_ARG(2); |
| 927 | len = arg2; |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 928 | |
| 929 | gf = get_guestfd(arg0); |
| 930 | if (!gf) { |
| 931 | errno = EBADF; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 932 | return set_swi_errno(cs, -1); |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 933 | } |
| 934 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 935 | return guestfd_fns[gf->type].writefn(cs, gf, arg1, len); |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 936 | case TARGET_SYS_READ: |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 937 | GET_ARG(0); |
| 938 | GET_ARG(1); |
| 939 | GET_ARG(2); |
| 940 | len = arg2; |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 941 | |
| 942 | gf = get_guestfd(arg0); |
| 943 | if (!gf) { |
| 944 | errno = EBADF; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 945 | return set_swi_errno(cs, -1); |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 946 | } |
| 947 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 948 | return guestfd_fns[gf->type].readfn(cs, gf, arg1, len); |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 949 | case TARGET_SYS_READC: |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 950 | return qemu_semihosting_console_inc(cs->env_ptr); |
Keith Packard | 767ba04 | 2021-01-08 22:42:56 +0000 | [diff] [blame] | 951 | case TARGET_SYS_ISERROR: |
| 952 | GET_ARG(0); |
| 953 | return (target_long) arg0 < 0 ? 1 : 0; |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 954 | case TARGET_SYS_ISTTY: |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 955 | GET_ARG(0); |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 956 | |
| 957 | gf = get_guestfd(arg0); |
| 958 | if (!gf) { |
| 959 | errno = EBADF; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 960 | return set_swi_errno(cs, -1); |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 961 | } |
| 962 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 963 | return guestfd_fns[gf->type].isattyfn(cs, gf); |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 964 | case TARGET_SYS_SEEK: |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 965 | GET_ARG(0); |
| 966 | GET_ARG(1); |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 967 | |
| 968 | gf = get_guestfd(arg0); |
| 969 | if (!gf) { |
| 970 | errno = EBADF; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 971 | return set_swi_errno(cs, -1); |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 972 | } |
| 973 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 974 | return guestfd_fns[gf->type].seekfn(cs, gf, arg1); |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 975 | case TARGET_SYS_FLEN: |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 976 | GET_ARG(0); |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 977 | |
| 978 | gf = get_guestfd(arg0); |
| 979 | if (!gf) { |
| 980 | errno = EBADF; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 981 | return set_swi_errno(cs, -1); |
Peter Maydell | 35e9a0a | 2019-09-16 15:15:33 +0100 | [diff] [blame] | 982 | } |
| 983 | |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 984 | return guestfd_fns[gf->type].flenfn(cs, gf); |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 985 | case TARGET_SYS_TMPNAM: |
Keith Packard | 27e3b10 | 2021-01-08 22:42:55 +0000 | [diff] [blame] | 986 | GET_ARG(0); |
| 987 | GET_ARG(1); |
| 988 | GET_ARG(2); |
| 989 | if (asprintf(&s, "/tmp/qemu-%x%02x", getpid(), |
| 990 | (int) (arg1 & 0xff)) < 0) { |
| 991 | return -1; |
| 992 | } |
| 993 | ul_ret = (target_ulong) -1; |
| 994 | |
| 995 | /* Make sure there's enough space in the buffer */ |
| 996 | if (strlen(s) < arg2) { |
| 997 | char *output = lock_user(VERIFY_WRITE, arg0, arg2, 0); |
| 998 | strcpy(output, s); |
| 999 | unlock_user(output, arg0, arg2); |
| 1000 | ul_ret = 0; |
| 1001 | } |
| 1002 | free(s); |
| 1003 | return ul_ret; |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 1004 | case TARGET_SYS_REMOVE: |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1005 | GET_ARG(0); |
| 1006 | GET_ARG(1); |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 1007 | if (use_gdb_syscalls()) { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1008 | ret = common_semi_gdb_syscall(cs, common_semi_cb, "unlink,%s", |
| 1009 | arg0, (int)arg1 + 1); |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 1010 | } else { |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1011 | s = lock_user_string(arg0); |
| 1012 | if (!s) { |
Peter Maydell | f7d38cf | 2019-09-16 15:15:31 +0100 | [diff] [blame] | 1013 | errno = EFAULT; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1014 | return set_swi_errno(cs, -1); |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1015 | } |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1016 | ret = set_swi_errno(cs, remove(s)); |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1017 | unlock_user(s, arg0, 0); |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 1018 | } |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 1019 | return ret; |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 1020 | case TARGET_SYS_RENAME: |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1021 | GET_ARG(0); |
| 1022 | GET_ARG(1); |
| 1023 | GET_ARG(2); |
| 1024 | GET_ARG(3); |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 1025 | if (use_gdb_syscalls()) { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1026 | return common_semi_gdb_syscall(cs, common_semi_cb, "rename,%s,%s", |
| 1027 | arg0, (int)arg1 + 1, arg2, |
| 1028 | (int)arg3 + 1); |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 1029 | } else { |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 1030 | char *s2; |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1031 | s = lock_user_string(arg0); |
| 1032 | s2 = lock_user_string(arg2); |
Peter Maydell | f7d38cf | 2019-09-16 15:15:31 +0100 | [diff] [blame] | 1033 | if (!s || !s2) { |
| 1034 | errno = EFAULT; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1035 | ret = set_swi_errno(cs, -1); |
Peter Maydell | f7d38cf | 2019-09-16 15:15:31 +0100 | [diff] [blame] | 1036 | } else { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1037 | ret = set_swi_errno(cs, rename(s, s2)); |
Peter Maydell | f7d38cf | 2019-09-16 15:15:31 +0100 | [diff] [blame] | 1038 | } |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 1039 | if (s2) |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1040 | unlock_user(s2, arg2, 0); |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 1041 | if (s) |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1042 | unlock_user(s, arg0, 0); |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 1043 | return ret; |
| 1044 | } |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 1045 | case TARGET_SYS_CLOCK: |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 1046 | return clock() / (CLOCKS_PER_SEC / 100); |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 1047 | case TARGET_SYS_TIME: |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1048 | return set_swi_errno(cs, time(NULL)); |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 1049 | case TARGET_SYS_SYSTEM: |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1050 | GET_ARG(0); |
| 1051 | GET_ARG(1); |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 1052 | if (use_gdb_syscalls()) { |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1053 | return common_semi_gdb_syscall(cs, common_semi_cb, "system,%s", |
| 1054 | arg0, (int)arg1 + 1); |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 1055 | } else { |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1056 | s = lock_user_string(arg0); |
| 1057 | if (!s) { |
Peter Maydell | f7d38cf | 2019-09-16 15:15:31 +0100 | [diff] [blame] | 1058 | errno = EFAULT; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1059 | return set_swi_errno(cs, -1); |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1060 | } |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1061 | ret = set_swi_errno(cs, system(s)); |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1062 | unlock_user(s, arg0, 0); |
ths | a982b53 | 2008-07-01 16:40:04 +0000 | [diff] [blame] | 1063 | return ret; |
pbrook | a2d1eba | 2007-01-28 03:10:55 +0000 | [diff] [blame] | 1064 | } |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 1065 | case TARGET_SYS_ERRNO: |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1066 | return get_swi_errno(cs); |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 1067 | case TARGET_SYS_GET_CMDLINE: |
pbrook | 38d0662 | 2006-11-19 20:29:35 +0000 | [diff] [blame] | 1068 | { |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1069 | /* Build a command-line from the original argv. |
| 1070 | * |
| 1071 | * The inputs are: |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1072 | * * arg0, pointer to a buffer of at least the size |
| 1073 | * specified in arg1. |
| 1074 | * * arg1, size of the buffer pointed to by arg0 in |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1075 | * bytes. |
| 1076 | * |
| 1077 | * The outputs are: |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1078 | * * arg0, pointer to null-terminated string of the |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1079 | * command line. |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1080 | * * arg1, length of the string pointed to by arg0. |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1081 | */ |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 1082 | |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1083 | char *output_buffer; |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1084 | size_t input_size; |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1085 | size_t output_size; |
| 1086 | int status = 0; |
Liviu Ionescu | f3c2bda | 2015-06-26 14:22:36 +0100 | [diff] [blame] | 1087 | #if !defined(CONFIG_USER_ONLY) |
| 1088 | const char *cmdline; |
Peter Maydell | 6ed6845 | 2019-09-16 15:15:34 +0100 | [diff] [blame] | 1089 | #else |
| 1090 | TaskState *ts = cs->opaque; |
Liviu Ionescu | f3c2bda | 2015-06-26 14:22:36 +0100 | [diff] [blame] | 1091 | #endif |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1092 | GET_ARG(0); |
| 1093 | GET_ARG(1); |
| 1094 | input_size = arg1; |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1095 | /* Compute the size of the output string. */ |
| 1096 | #if !defined(CONFIG_USER_ONLY) |
Liviu Ionescu | f3c2bda | 2015-06-26 14:22:36 +0100 | [diff] [blame] | 1097 | cmdline = semihosting_get_cmdline(); |
| 1098 | if (cmdline == NULL) { |
| 1099 | cmdline = ""; /* Default to an empty line. */ |
| 1100 | } |
| 1101 | output_size = strlen(cmdline) + 1; /* Count terminating 0. */ |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1102 | #else |
Wolfgang Schildbach | 2e8785a | 2010-12-06 15:06:05 +0000 | [diff] [blame] | 1103 | unsigned int i; |
pbrook | 38d0662 | 2006-11-19 20:29:35 +0000 | [diff] [blame] | 1104 | |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1105 | output_size = ts->info->arg_end - ts->info->arg_start; |
| 1106 | if (!output_size) { |
Alex Bennée | 4cb28db | 2019-05-14 12:08:39 +0100 | [diff] [blame] | 1107 | /* |
| 1108 | * We special-case the "empty command line" case (argc==0). |
| 1109 | * Just provide the terminating 0. |
| 1110 | */ |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1111 | output_size = 1; |
Wolfgang Schildbach | 2e8785a | 2010-12-06 15:06:05 +0000 | [diff] [blame] | 1112 | } |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 1113 | #endif |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1114 | |
| 1115 | if (output_size > input_size) { |
Alex Bennée | 4cb28db | 2019-05-14 12:08:39 +0100 | [diff] [blame] | 1116 | /* Not enough space to store command-line arguments. */ |
Peter Maydell | f7d38cf | 2019-09-16 15:15:31 +0100 | [diff] [blame] | 1117 | errno = E2BIG; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1118 | return set_swi_errno(cs, -1); |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1119 | } |
| 1120 | |
| 1121 | /* Adjust the command-line length. */ |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1122 | if (SET_ARG(1, output_size - 1)) { |
| 1123 | /* Couldn't write back to argument block */ |
Peter Maydell | f7d38cf | 2019-09-16 15:15:31 +0100 | [diff] [blame] | 1124 | errno = EFAULT; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1125 | return set_swi_errno(cs, -1); |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1126 | } |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1127 | |
| 1128 | /* Lock the buffer on the ARM side. */ |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1129 | output_buffer = lock_user(VERIFY_WRITE, arg0, output_size, 0); |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1130 | if (!output_buffer) { |
Peter Maydell | f7d38cf | 2019-09-16 15:15:31 +0100 | [diff] [blame] | 1131 | errno = EFAULT; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1132 | return set_swi_errno(cs, -1); |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1133 | } |
| 1134 | |
| 1135 | /* Copy the command-line arguments. */ |
| 1136 | #if !defined(CONFIG_USER_ONLY) |
Liviu Ionescu | f3c2bda | 2015-06-26 14:22:36 +0100 | [diff] [blame] | 1137 | pstrcpy(output_buffer, output_size, cmdline); |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1138 | #else |
| 1139 | if (output_size == 1) { |
| 1140 | /* Empty command-line. */ |
| 1141 | output_buffer[0] = '\0'; |
| 1142 | goto out; |
| 1143 | } |
| 1144 | |
| 1145 | if (copy_from_user(output_buffer, ts->info->arg_start, |
| 1146 | output_size)) { |
Peter Maydell | f7d38cf | 2019-09-16 15:15:31 +0100 | [diff] [blame] | 1147 | errno = EFAULT; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1148 | status = set_swi_errno(cs, -1); |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1149 | goto out; |
| 1150 | } |
| 1151 | |
| 1152 | /* Separate arguments by white spaces. */ |
| 1153 | for (i = 0; i < output_size - 1; i++) { |
| 1154 | if (output_buffer[i] == 0) { |
| 1155 | output_buffer[i] = ' '; |
| 1156 | } |
| 1157 | } |
| 1158 | out: |
| 1159 | #endif |
| 1160 | /* Unlock the buffer on the ARM side. */ |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1161 | unlock_user(output_buffer, arg0, output_size); |
Cédric VINCENT | 1c1b40c | 2011-06-29 12:49:41 +0200 | [diff] [blame] | 1162 | |
| 1163 | return status; |
| 1164 | } |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 1165 | case TARGET_SYS_HEAPINFO: |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 1166 | { |
Peter Maydell | f566641 | 2016-07-04 13:06:35 +0100 | [diff] [blame] | 1167 | target_ulong retvals[4]; |
Peter Maydell | 90e26f5 | 2016-07-07 13:47:00 +0100 | [diff] [blame] | 1168 | target_ulong limit; |
Peter Maydell | f566641 | 2016-07-04 13:06:35 +0100 | [diff] [blame] | 1169 | int i; |
Peter Maydell | 6ed6845 | 2019-09-16 15:15:34 +0100 | [diff] [blame] | 1170 | #ifdef CONFIG_USER_ONLY |
| 1171 | TaskState *ts = cs->opaque; |
Peter Maydell | 6951595 | 2020-11-19 09:23:46 +0000 | [diff] [blame] | 1172 | #else |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1173 | target_ulong rambase = common_semi_rambase(cs); |
Peter Maydell | 6ed6845 | 2019-09-16 15:15:34 +0100 | [diff] [blame] | 1174 | #endif |
Peter Maydell | f566641 | 2016-07-04 13:06:35 +0100 | [diff] [blame] | 1175 | |
Peter Maydell | f296c0d | 2012-10-14 09:52:27 +0000 | [diff] [blame] | 1176 | GET_ARG(0); |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 1177 | |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 1178 | #ifdef CONFIG_USER_ONLY |
Alex Bennée | 4cb28db | 2019-05-14 12:08:39 +0100 | [diff] [blame] | 1179 | /* |
| 1180 | * Some C libraries assume the heap immediately follows .bss, so |
| 1181 | * allocate it using sbrk. |
| 1182 | */ |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 1183 | if (!ts->heap_limit) { |
Peter Maydell | 206ae74 | 2011-04-18 16:34:25 +0100 | [diff] [blame] | 1184 | abi_ulong ret; |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 1185 | |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 1186 | ts->heap_base = do_brk(0); |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1187 | limit = ts->heap_base + COMMON_SEMI_HEAP_SIZE; |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 1188 | /* Try a big heap, and reduce the size if that fails. */ |
| 1189 | for (;;) { |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 1190 | ret = do_brk(limit); |
Peter Maydell | 206ae74 | 2011-04-18 16:34:25 +0100 | [diff] [blame] | 1191 | if (ret >= limit) { |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 1192 | break; |
Peter Maydell | 206ae74 | 2011-04-18 16:34:25 +0100 | [diff] [blame] | 1193 | } |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 1194 | limit = (ts->heap_base >> 1) + (limit >> 1); |
| 1195 | } |
| 1196 | ts->heap_limit = limit; |
| 1197 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 1198 | |
Peter Maydell | f566641 | 2016-07-04 13:06:35 +0100 | [diff] [blame] | 1199 | retvals[0] = ts->heap_base; |
| 1200 | retvals[1] = ts->heap_limit; |
| 1201 | retvals[2] = ts->stack_base; |
| 1202 | retvals[3] = 0; /* Stack limit. */ |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 1203 | #else |
Paolo Bonzini | 6e504a9 | 2020-10-28 06:18:20 -0400 | [diff] [blame] | 1204 | limit = current_machine->ram_size; |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 1205 | /* TODO: Make this use the limit of the loaded application. */ |
Peter Maydell | 6951595 | 2020-11-19 09:23:46 +0000 | [diff] [blame] | 1206 | retvals[0] = rambase + limit / 2; |
| 1207 | retvals[1] = rambase + limit; |
| 1208 | retvals[2] = rambase + limit; /* Stack base */ |
| 1209 | retvals[3] = rambase; /* Stack limit. */ |
pbrook | 8e71621 | 2007-01-20 17:12:09 +0000 | [diff] [blame] | 1210 | #endif |
Peter Maydell | f566641 | 2016-07-04 13:06:35 +0100 | [diff] [blame] | 1211 | |
| 1212 | for (i = 0; i < ARRAY_SIZE(retvals); i++) { |
| 1213 | bool fail; |
| 1214 | |
Alex Bennée | 35e3f02 | 2021-03-23 16:52:53 +0000 | [diff] [blame] | 1215 | if (is_64bit_semihosting(env)) { |
| 1216 | fail = put_user_u64(retvals[i], arg0 + i * 8); |
| 1217 | } else { |
| 1218 | fail = put_user_u32(retvals[i], arg0 + i * 4); |
| 1219 | } |
Peter Maydell | f566641 | 2016-07-04 13:06:35 +0100 | [diff] [blame] | 1220 | |
| 1221 | if (fail) { |
| 1222 | /* Couldn't write back to argument block */ |
Peter Maydell | f7d38cf | 2019-09-16 15:15:31 +0100 | [diff] [blame] | 1223 | errno = EFAULT; |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1224 | return set_swi_errno(cs, -1); |
Peter Maydell | f566641 | 2016-07-04 13:06:35 +0100 | [diff] [blame] | 1225 | } |
| 1226 | } |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 1227 | return 0; |
| 1228 | } |
Stefan Weil | 3881725 | 2012-04-28 05:07:47 +0000 | [diff] [blame] | 1229 | case TARGET_SYS_EXIT: |
Peter Maydell | 22a43bb | 2019-09-16 15:15:43 +0100 | [diff] [blame] | 1230 | case TARGET_SYS_EXIT_EXTENDED: |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1231 | if (common_semi_sys_exit_extended(cs, nr)) { |
Alex Bennée | 4cb28db | 2019-05-14 12:08:39 +0100 | [diff] [blame] | 1232 | /* |
Peter Maydell | 22a43bb | 2019-09-16 15:15:43 +0100 | [diff] [blame] | 1233 | * The A64 version of SYS_EXIT takes a parameter block, |
Peter Maydell | 7446d35 | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 1234 | * so the application-exit type can return a subcode which |
| 1235 | * is the exit status code from the application. |
Peter Maydell | 22a43bb | 2019-09-16 15:15:43 +0100 | [diff] [blame] | 1236 | * SYS_EXIT_EXTENDED is an a new-in-v2.0 optional function |
| 1237 | * which allows A32/T32 guests to also provide a status code. |
Peter Maydell | 7446d35 | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 1238 | */ |
| 1239 | GET_ARG(0); |
| 1240 | GET_ARG(1); |
| 1241 | |
| 1242 | if (arg0 == ADP_Stopped_ApplicationExit) { |
| 1243 | ret = arg1; |
| 1244 | } else { |
| 1245 | ret = 1; |
| 1246 | } |
| 1247 | } else { |
Alex Bennée | 4cb28db | 2019-05-14 12:08:39 +0100 | [diff] [blame] | 1248 | /* |
Peter Maydell | 22a43bb | 2019-09-16 15:15:43 +0100 | [diff] [blame] | 1249 | * The A32/T32 version of SYS_EXIT specifies only |
| 1250 | * Stopped_ApplicationExit as normal exit, but does not |
| 1251 | * allow the guest to specify the exit status code. |
| 1252 | * Everything else is considered an error. |
Alex Bennée | 4cb28db | 2019-05-14 12:08:39 +0100 | [diff] [blame] | 1253 | */ |
Peter Maydell | 7446d35 | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 1254 | ret = (args == ADP_Stopped_ApplicationExit) ? 0 : 1; |
| 1255 | } |
Alex Bennée | ad9dcb2 | 2021-01-08 22:42:43 +0000 | [diff] [blame] | 1256 | gdb_exit(ret); |
Liviu Ionescu | 1ecc3a2 | 2014-12-11 12:07:48 +0000 | [diff] [blame] | 1257 | exit(ret); |
Keith Packard | 4d83403 | 2021-01-08 22:42:54 +0000 | [diff] [blame] | 1258 | case TARGET_SYS_ELAPSED: |
| 1259 | elapsed = get_clock() - clock_start; |
| 1260 | if (sizeof(target_ulong) == 8) { |
| 1261 | SET_ARG(0, elapsed); |
| 1262 | } else { |
| 1263 | SET_ARG(0, (uint32_t) elapsed); |
| 1264 | SET_ARG(1, (uint32_t) (elapsed >> 32)); |
| 1265 | } |
| 1266 | return 0; |
| 1267 | case TARGET_SYS_TICKFREQ: |
| 1268 | /* qemu always uses nsec */ |
| 1269 | return 1000000000; |
Peter Maydell | e9ebfbf | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 1270 | case TARGET_SYS_SYNCCACHE: |
Alex Bennée | 4cb28db | 2019-05-14 12:08:39 +0100 | [diff] [blame] | 1271 | /* |
| 1272 | * Clean the D-cache and invalidate the I-cache for the specified |
Peter Maydell | e9ebfbf | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 1273 | * virtual address range. This is a nop for us since we don't |
| 1274 | * implement caches. This is only present on A64. |
| 1275 | */ |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1276 | #ifdef TARGET_ARM |
| 1277 | if (is_a64(cs->env_ptr)) { |
Peter Maydell | e9ebfbf | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 1278 | return 0; |
| 1279 | } |
Keith Packard | 3c37cfe | 2021-01-08 22:42:50 +0000 | [diff] [blame] | 1280 | #endif |
Keith Packard | a10b9d9 | 2021-01-08 22:42:52 +0000 | [diff] [blame] | 1281 | #ifdef TARGET_RISCV |
| 1282 | return 0; |
| 1283 | #endif |
Peter Maydell | e9ebfbf | 2015-09-07 10:39:28 +0100 | [diff] [blame] | 1284 | /* fall through -- invalid for A32/T32 */ |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 1285 | default: |
| 1286 | fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr); |
Markus Armbruster | 90c84c5 | 2019-04-17 21:18:02 +0200 | [diff] [blame] | 1287 | cpu_dump_state(cs, stderr, 0); |
bellard | a4f8197 | 2005-04-23 18:25:41 +0000 | [diff] [blame] | 1288 | abort(); |
| 1289 | } |
| 1290 | } |