Blue Swirl | 42a623c | 2011-05-08 11:22:38 +0000 | [diff] [blame] | 1 | /* |
| 2 | * User emulator execution |
| 3 | * |
| 4 | * Copyright (c) 2003-2005 Fabrice Bellard |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| 18 | */ |
| 19 | #include "config.h" |
Blue Swirl | 3e45717 | 2011-07-13 12:44:15 +0000 | [diff] [blame] | 20 | #include "cpu.h" |
| 21 | #include "dyngen-exec.h" |
Blue Swirl | 42a623c | 2011-05-08 11:22:38 +0000 | [diff] [blame] | 22 | #include "disas.h" |
| 23 | #include "tcg.h" |
| 24 | |
| 25 | #undef EAX |
| 26 | #undef ECX |
| 27 | #undef EDX |
| 28 | #undef EBX |
| 29 | #undef ESP |
| 30 | #undef EBP |
| 31 | #undef ESI |
| 32 | #undef EDI |
| 33 | #undef EIP |
| 34 | #include <signal.h> |
| 35 | #ifdef __linux__ |
| 36 | #include <sys/ucontext.h> |
| 37 | #endif |
| 38 | |
| 39 | //#define DEBUG_SIGNAL |
| 40 | |
Blue Swirl | 1162c04 | 2011-05-14 12:52:35 +0000 | [diff] [blame] | 41 | static void exception_action(CPUState *env1) |
| 42 | { |
Blue Swirl | 42a623c | 2011-05-08 11:22:38 +0000 | [diff] [blame] | 43 | #if defined(TARGET_I386) |
Blue Swirl | 3e45717 | 2011-07-13 12:44:15 +0000 | [diff] [blame] | 44 | raise_exception_err_env(env1, env1->exception_index, env1->error_code); |
Blue Swirl | 42a623c | 2011-05-08 11:22:38 +0000 | [diff] [blame] | 45 | #else |
Blue Swirl | 1162c04 | 2011-05-14 12:52:35 +0000 | [diff] [blame] | 46 | cpu_loop_exit(env1); |
Blue Swirl | 42a623c | 2011-05-08 11:22:38 +0000 | [diff] [blame] | 47 | #endif |
Blue Swirl | 1162c04 | 2011-05-14 12:52:35 +0000 | [diff] [blame] | 48 | } |
Blue Swirl | 42a623c | 2011-05-08 11:22:38 +0000 | [diff] [blame] | 49 | |
| 50 | /* exit the current TB from a signal handler. The host registers are |
| 51 | restored in a state compatible with the CPU emulator |
| 52 | */ |
| 53 | void cpu_resume_from_signal(CPUState *env1, void *puc) |
| 54 | { |
| 55 | #ifdef __linux__ |
| 56 | struct ucontext *uc = puc; |
| 57 | #elif defined(__OpenBSD__) |
| 58 | struct sigcontext *uc = puc; |
| 59 | #endif |
| 60 | |
| 61 | env = env1; |
| 62 | |
| 63 | /* XXX: restore cpu registers saved in host registers */ |
| 64 | |
| 65 | if (puc) { |
| 66 | /* XXX: use siglongjmp ? */ |
| 67 | #ifdef __linux__ |
| 68 | #ifdef __ia64 |
| 69 | sigprocmask(SIG_SETMASK, (sigset_t *)&uc->uc_sigmask, NULL); |
| 70 | #else |
| 71 | sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL); |
| 72 | #endif |
| 73 | #elif defined(__OpenBSD__) |
| 74 | sigprocmask(SIG_SETMASK, &uc->sc_mask, NULL); |
| 75 | #endif |
| 76 | } |
| 77 | env->exception_index = -1; |
| 78 | longjmp(env->jmp_env, 1); |
| 79 | } |
| 80 | |
| 81 | /* 'pc' is the host PC at which the exception was raised. 'address' is |
| 82 | the effective address of the memory exception. 'is_write' is 1 if a |
| 83 | write caused the exception and otherwise 0'. 'old_set' is the |
| 84 | signal set which should be restored */ |
| 85 | static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
| 86 | int is_write, sigset_t *old_set, |
| 87 | void *puc) |
| 88 | { |
| 89 | TranslationBlock *tb; |
| 90 | int ret; |
| 91 | |
| 92 | if (cpu_single_env) { |
| 93 | env = cpu_single_env; /* XXX: find a correct solution for multithread */ |
| 94 | } |
| 95 | #if defined(DEBUG_SIGNAL) |
| 96 | qemu_printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n", |
| 97 | pc, address, is_write, *(unsigned long *)old_set); |
| 98 | #endif |
| 99 | /* XXX: locking issue */ |
| 100 | if (is_write && page_unprotect(h2g(address), pc, puc)) { |
| 101 | return 1; |
| 102 | } |
| 103 | |
| 104 | /* see if it is an MMU fault */ |
Blue Swirl | 97b348e | 2011-08-01 16:12:17 +0000 | [diff] [blame] | 105 | ret = cpu_handle_mmu_fault(env, address, is_write, MMU_USER_IDX); |
Blue Swirl | 42a623c | 2011-05-08 11:22:38 +0000 | [diff] [blame] | 106 | if (ret < 0) { |
| 107 | return 0; /* not an MMU fault */ |
| 108 | } |
| 109 | if (ret == 0) { |
| 110 | return 1; /* the MMU fault was handled without causing real CPU fault */ |
| 111 | } |
| 112 | /* now we have a real cpu fault */ |
| 113 | tb = tb_find_pc(pc); |
| 114 | if (tb) { |
| 115 | /* the PC is inside the translated code. It means that we have |
| 116 | a virtual CPU fault */ |
| 117 | cpu_restore_state(tb, env, pc); |
| 118 | } |
| 119 | |
| 120 | /* we restore the process signal mask as the sigreturn should |
| 121 | do it (XXX: use sigsetjmp) */ |
| 122 | sigprocmask(SIG_SETMASK, old_set, NULL); |
Blue Swirl | 1162c04 | 2011-05-14 12:52:35 +0000 | [diff] [blame] | 123 | exception_action(env); |
Blue Swirl | 42a623c | 2011-05-08 11:22:38 +0000 | [diff] [blame] | 124 | |
| 125 | /* never comes here */ |
| 126 | return 1; |
| 127 | } |
| 128 | |
| 129 | #if defined(__i386__) |
| 130 | |
| 131 | #if defined(__APPLE__) |
| 132 | #include <sys/ucontext.h> |
| 133 | |
| 134 | #define EIP_sig(context) (*((unsigned long *)&(context)->uc_mcontext->ss.eip)) |
| 135 | #define TRAP_sig(context) ((context)->uc_mcontext->es.trapno) |
| 136 | #define ERROR_sig(context) ((context)->uc_mcontext->es.err) |
| 137 | #define MASK_sig(context) ((context)->uc_sigmask) |
| 138 | #elif defined(__NetBSD__) |
| 139 | #include <ucontext.h> |
| 140 | |
| 141 | #define EIP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EIP]) |
| 142 | #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO]) |
| 143 | #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR]) |
| 144 | #define MASK_sig(context) ((context)->uc_sigmask) |
| 145 | #elif defined(__FreeBSD__) || defined(__DragonFly__) |
| 146 | #include <ucontext.h> |
| 147 | |
| 148 | #define EIP_sig(context) (*((unsigned long *)&(context)->uc_mcontext.mc_eip)) |
| 149 | #define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno) |
| 150 | #define ERROR_sig(context) ((context)->uc_mcontext.mc_err) |
| 151 | #define MASK_sig(context) ((context)->uc_sigmask) |
| 152 | #elif defined(__OpenBSD__) |
| 153 | #define EIP_sig(context) ((context)->sc_eip) |
| 154 | #define TRAP_sig(context) ((context)->sc_trapno) |
| 155 | #define ERROR_sig(context) ((context)->sc_err) |
| 156 | #define MASK_sig(context) ((context)->sc_mask) |
| 157 | #else |
| 158 | #define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP]) |
| 159 | #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO]) |
| 160 | #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR]) |
| 161 | #define MASK_sig(context) ((context)->uc_sigmask) |
| 162 | #endif |
| 163 | |
| 164 | int cpu_signal_handler(int host_signum, void *pinfo, |
| 165 | void *puc) |
| 166 | { |
| 167 | siginfo_t *info = pinfo; |
| 168 | #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) |
| 169 | ucontext_t *uc = puc; |
| 170 | #elif defined(__OpenBSD__) |
| 171 | struct sigcontext *uc = puc; |
| 172 | #else |
| 173 | struct ucontext *uc = puc; |
| 174 | #endif |
| 175 | unsigned long pc; |
| 176 | int trapno; |
| 177 | |
| 178 | #ifndef REG_EIP |
| 179 | /* for glibc 2.1 */ |
| 180 | #define REG_EIP EIP |
| 181 | #define REG_ERR ERR |
| 182 | #define REG_TRAPNO TRAPNO |
| 183 | #endif |
| 184 | pc = EIP_sig(uc); |
| 185 | trapno = TRAP_sig(uc); |
| 186 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 187 | trapno == 0xe ? |
| 188 | (ERROR_sig(uc) >> 1) & 1 : 0, |
| 189 | &MASK_sig(uc), puc); |
| 190 | } |
| 191 | |
| 192 | #elif defined(__x86_64__) |
| 193 | |
| 194 | #ifdef __NetBSD__ |
| 195 | #define PC_sig(context) _UC_MACHINE_PC(context) |
| 196 | #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO]) |
| 197 | #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR]) |
| 198 | #define MASK_sig(context) ((context)->uc_sigmask) |
| 199 | #elif defined(__OpenBSD__) |
| 200 | #define PC_sig(context) ((context)->sc_rip) |
| 201 | #define TRAP_sig(context) ((context)->sc_trapno) |
| 202 | #define ERROR_sig(context) ((context)->sc_err) |
| 203 | #define MASK_sig(context) ((context)->sc_mask) |
| 204 | #elif defined(__FreeBSD__) || defined(__DragonFly__) |
| 205 | #include <ucontext.h> |
| 206 | |
| 207 | #define PC_sig(context) (*((unsigned long *)&(context)->uc_mcontext.mc_rip)) |
| 208 | #define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno) |
| 209 | #define ERROR_sig(context) ((context)->uc_mcontext.mc_err) |
| 210 | #define MASK_sig(context) ((context)->uc_sigmask) |
| 211 | #else |
| 212 | #define PC_sig(context) ((context)->uc_mcontext.gregs[REG_RIP]) |
| 213 | #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO]) |
| 214 | #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR]) |
| 215 | #define MASK_sig(context) ((context)->uc_sigmask) |
| 216 | #endif |
| 217 | |
| 218 | int cpu_signal_handler(int host_signum, void *pinfo, |
| 219 | void *puc) |
| 220 | { |
| 221 | siginfo_t *info = pinfo; |
| 222 | unsigned long pc; |
| 223 | #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) |
| 224 | ucontext_t *uc = puc; |
| 225 | #elif defined(__OpenBSD__) |
| 226 | struct sigcontext *uc = puc; |
| 227 | #else |
| 228 | struct ucontext *uc = puc; |
| 229 | #endif |
| 230 | |
| 231 | pc = PC_sig(uc); |
| 232 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 233 | TRAP_sig(uc) == 0xe ? |
| 234 | (ERROR_sig(uc) >> 1) & 1 : 0, |
| 235 | &MASK_sig(uc), puc); |
| 236 | } |
| 237 | |
| 238 | #elif defined(_ARCH_PPC) |
| 239 | |
| 240 | /*********************************************************************** |
| 241 | * signal context platform-specific definitions |
| 242 | * From Wine |
| 243 | */ |
| 244 | #ifdef linux |
| 245 | /* All Registers access - only for local access */ |
| 246 | #define REG_sig(reg_name, context) \ |
| 247 | ((context)->uc_mcontext.regs->reg_name) |
| 248 | /* Gpr Registers access */ |
| 249 | #define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context) |
| 250 | /* Program counter */ |
| 251 | #define IAR_sig(context) REG_sig(nip, context) |
| 252 | /* Machine State Register (Supervisor) */ |
| 253 | #define MSR_sig(context) REG_sig(msr, context) |
| 254 | /* Count register */ |
| 255 | #define CTR_sig(context) REG_sig(ctr, context) |
| 256 | /* User's integer exception register */ |
| 257 | #define XER_sig(context) REG_sig(xer, context) |
| 258 | /* Link register */ |
| 259 | #define LR_sig(context) REG_sig(link, context) |
| 260 | /* Condition register */ |
| 261 | #define CR_sig(context) REG_sig(ccr, context) |
| 262 | |
| 263 | /* Float Registers access */ |
| 264 | #define FLOAT_sig(reg_num, context) \ |
| 265 | (((double *)((char *)((context)->uc_mcontext.regs + 48 * 4)))[reg_num]) |
| 266 | #define FPSCR_sig(context) \ |
| 267 | (*(int *)((char *)((context)->uc_mcontext.regs + (48 + 32 * 2) * 4))) |
| 268 | /* Exception Registers access */ |
| 269 | #define DAR_sig(context) REG_sig(dar, context) |
| 270 | #define DSISR_sig(context) REG_sig(dsisr, context) |
| 271 | #define TRAP_sig(context) REG_sig(trap, context) |
| 272 | #endif /* linux */ |
| 273 | |
| 274 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
| 275 | #include <ucontext.h> |
| 276 | #define IAR_sig(context) ((context)->uc_mcontext.mc_srr0) |
| 277 | #define MSR_sig(context) ((context)->uc_mcontext.mc_srr1) |
| 278 | #define CTR_sig(context) ((context)->uc_mcontext.mc_ctr) |
| 279 | #define XER_sig(context) ((context)->uc_mcontext.mc_xer) |
| 280 | #define LR_sig(context) ((context)->uc_mcontext.mc_lr) |
| 281 | #define CR_sig(context) ((context)->uc_mcontext.mc_cr) |
| 282 | /* Exception Registers access */ |
| 283 | #define DAR_sig(context) ((context)->uc_mcontext.mc_dar) |
| 284 | #define DSISR_sig(context) ((context)->uc_mcontext.mc_dsisr) |
| 285 | #define TRAP_sig(context) ((context)->uc_mcontext.mc_exc) |
| 286 | #endif /* __FreeBSD__|| __FreeBSD_kernel__ */ |
| 287 | |
| 288 | #ifdef __APPLE__ |
| 289 | #include <sys/ucontext.h> |
| 290 | typedef struct ucontext SIGCONTEXT; |
| 291 | /* All Registers access - only for local access */ |
| 292 | #define REG_sig(reg_name, context) \ |
| 293 | ((context)->uc_mcontext->ss.reg_name) |
| 294 | #define FLOATREG_sig(reg_name, context) \ |
| 295 | ((context)->uc_mcontext->fs.reg_name) |
| 296 | #define EXCEPREG_sig(reg_name, context) \ |
| 297 | ((context)->uc_mcontext->es.reg_name) |
| 298 | #define VECREG_sig(reg_name, context) \ |
| 299 | ((context)->uc_mcontext->vs.reg_name) |
| 300 | /* Gpr Registers access */ |
| 301 | #define GPR_sig(reg_num, context) REG_sig(r##reg_num, context) |
| 302 | /* Program counter */ |
| 303 | #define IAR_sig(context) REG_sig(srr0, context) |
| 304 | /* Machine State Register (Supervisor) */ |
| 305 | #define MSR_sig(context) REG_sig(srr1, context) |
| 306 | #define CTR_sig(context) REG_sig(ctr, context) |
| 307 | /* Link register */ |
| 308 | #define XER_sig(context) REG_sig(xer, context) |
| 309 | /* User's integer exception register */ |
| 310 | #define LR_sig(context) REG_sig(lr, context) |
| 311 | /* Condition register */ |
| 312 | #define CR_sig(context) REG_sig(cr, context) |
| 313 | /* Float Registers access */ |
| 314 | #define FLOAT_sig(reg_num, context) \ |
| 315 | FLOATREG_sig(fpregs[reg_num], context) |
| 316 | #define FPSCR_sig(context) \ |
| 317 | ((double)FLOATREG_sig(fpscr, context)) |
| 318 | /* Exception Registers access */ |
| 319 | /* Fault registers for coredump */ |
| 320 | #define DAR_sig(context) EXCEPREG_sig(dar, context) |
| 321 | #define DSISR_sig(context) EXCEPREG_sig(dsisr, context) |
| 322 | /* number of powerpc exception taken */ |
| 323 | #define TRAP_sig(context) EXCEPREG_sig(exception, context) |
| 324 | #endif /* __APPLE__ */ |
| 325 | |
| 326 | int cpu_signal_handler(int host_signum, void *pinfo, |
| 327 | void *puc) |
| 328 | { |
| 329 | siginfo_t *info = pinfo; |
| 330 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
| 331 | ucontext_t *uc = puc; |
| 332 | #else |
| 333 | struct ucontext *uc = puc; |
| 334 | #endif |
| 335 | unsigned long pc; |
| 336 | int is_write; |
| 337 | |
| 338 | pc = IAR_sig(uc); |
| 339 | is_write = 0; |
| 340 | #if 0 |
| 341 | /* ppc 4xx case */ |
| 342 | if (DSISR_sig(uc) & 0x00800000) { |
| 343 | is_write = 1; |
| 344 | } |
| 345 | #else |
| 346 | if (TRAP_sig(uc) != 0x400 && (DSISR_sig(uc) & 0x02000000)) { |
| 347 | is_write = 1; |
| 348 | } |
| 349 | #endif |
| 350 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 351 | is_write, &uc->uc_sigmask, puc); |
| 352 | } |
| 353 | |
| 354 | #elif defined(__alpha__) |
| 355 | |
| 356 | int cpu_signal_handler(int host_signum, void *pinfo, |
| 357 | void *puc) |
| 358 | { |
| 359 | siginfo_t *info = pinfo; |
| 360 | struct ucontext *uc = puc; |
| 361 | uint32_t *pc = uc->uc_mcontext.sc_pc; |
| 362 | uint32_t insn = *pc; |
| 363 | int is_write = 0; |
| 364 | |
| 365 | /* XXX: need kernel patch to get write flag faster */ |
| 366 | switch (insn >> 26) { |
| 367 | case 0x0d: /* stw */ |
| 368 | case 0x0e: /* stb */ |
| 369 | case 0x0f: /* stq_u */ |
| 370 | case 0x24: /* stf */ |
| 371 | case 0x25: /* stg */ |
| 372 | case 0x26: /* sts */ |
| 373 | case 0x27: /* stt */ |
| 374 | case 0x2c: /* stl */ |
| 375 | case 0x2d: /* stq */ |
| 376 | case 0x2e: /* stl_c */ |
| 377 | case 0x2f: /* stq_c */ |
| 378 | is_write = 1; |
| 379 | } |
| 380 | |
| 381 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 382 | is_write, &uc->uc_sigmask, puc); |
| 383 | } |
| 384 | #elif defined(__sparc__) |
| 385 | |
| 386 | int cpu_signal_handler(int host_signum, void *pinfo, |
| 387 | void *puc) |
| 388 | { |
| 389 | siginfo_t *info = pinfo; |
| 390 | int is_write; |
| 391 | uint32_t insn; |
| 392 | #if !defined(__arch64__) || defined(CONFIG_SOLARIS) |
| 393 | uint32_t *regs = (uint32_t *)(info + 1); |
| 394 | void *sigmask = (regs + 20); |
| 395 | /* XXX: is there a standard glibc define ? */ |
| 396 | unsigned long pc = regs[1]; |
| 397 | #else |
| 398 | #ifdef __linux__ |
| 399 | struct sigcontext *sc = puc; |
| 400 | unsigned long pc = sc->sigc_regs.tpc; |
| 401 | void *sigmask = (void *)sc->sigc_mask; |
| 402 | #elif defined(__OpenBSD__) |
| 403 | struct sigcontext *uc = puc; |
| 404 | unsigned long pc = uc->sc_pc; |
| 405 | void *sigmask = (void *)(long)uc->sc_mask; |
| 406 | #endif |
| 407 | #endif |
| 408 | |
| 409 | /* XXX: need kernel patch to get write flag faster */ |
| 410 | is_write = 0; |
| 411 | insn = *(uint32_t *)pc; |
| 412 | if ((insn >> 30) == 3) { |
| 413 | switch ((insn >> 19) & 0x3f) { |
| 414 | case 0x05: /* stb */ |
| 415 | case 0x15: /* stba */ |
| 416 | case 0x06: /* sth */ |
| 417 | case 0x16: /* stha */ |
| 418 | case 0x04: /* st */ |
| 419 | case 0x14: /* sta */ |
| 420 | case 0x07: /* std */ |
| 421 | case 0x17: /* stda */ |
| 422 | case 0x0e: /* stx */ |
| 423 | case 0x1e: /* stxa */ |
| 424 | case 0x24: /* stf */ |
| 425 | case 0x34: /* stfa */ |
| 426 | case 0x27: /* stdf */ |
| 427 | case 0x37: /* stdfa */ |
| 428 | case 0x26: /* stqf */ |
| 429 | case 0x36: /* stqfa */ |
| 430 | case 0x25: /* stfsr */ |
| 431 | case 0x3c: /* casa */ |
| 432 | case 0x3e: /* casxa */ |
| 433 | is_write = 1; |
| 434 | break; |
| 435 | } |
| 436 | } |
| 437 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 438 | is_write, sigmask, NULL); |
| 439 | } |
| 440 | |
| 441 | #elif defined(__arm__) |
| 442 | |
| 443 | int cpu_signal_handler(int host_signum, void *pinfo, |
| 444 | void *puc) |
| 445 | { |
| 446 | siginfo_t *info = pinfo; |
| 447 | struct ucontext *uc = puc; |
| 448 | unsigned long pc; |
| 449 | int is_write; |
| 450 | |
| 451 | #if (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 3)) |
| 452 | pc = uc->uc_mcontext.gregs[R15]; |
| 453 | #else |
| 454 | pc = uc->uc_mcontext.arm_pc; |
| 455 | #endif |
| 456 | /* XXX: compute is_write */ |
| 457 | is_write = 0; |
| 458 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 459 | is_write, |
| 460 | &uc->uc_sigmask, puc); |
| 461 | } |
| 462 | |
| 463 | #elif defined(__mc68000) |
| 464 | |
| 465 | int cpu_signal_handler(int host_signum, void *pinfo, |
| 466 | void *puc) |
| 467 | { |
| 468 | siginfo_t *info = pinfo; |
| 469 | struct ucontext *uc = puc; |
| 470 | unsigned long pc; |
| 471 | int is_write; |
| 472 | |
| 473 | pc = uc->uc_mcontext.gregs[16]; |
| 474 | /* XXX: compute is_write */ |
| 475 | is_write = 0; |
| 476 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 477 | is_write, |
| 478 | &uc->uc_sigmask, puc); |
| 479 | } |
| 480 | |
| 481 | #elif defined(__ia64) |
| 482 | |
| 483 | #ifndef __ISR_VALID |
| 484 | /* This ought to be in <bits/siginfo.h>... */ |
| 485 | # define __ISR_VALID 1 |
| 486 | #endif |
| 487 | |
| 488 | int cpu_signal_handler(int host_signum, void *pinfo, void *puc) |
| 489 | { |
| 490 | siginfo_t *info = pinfo; |
| 491 | struct ucontext *uc = puc; |
| 492 | unsigned long ip; |
| 493 | int is_write = 0; |
| 494 | |
| 495 | ip = uc->uc_mcontext.sc_ip; |
| 496 | switch (host_signum) { |
| 497 | case SIGILL: |
| 498 | case SIGFPE: |
| 499 | case SIGSEGV: |
| 500 | case SIGBUS: |
| 501 | case SIGTRAP: |
| 502 | if (info->si_code && (info->si_segvflags & __ISR_VALID)) { |
| 503 | /* ISR.W (write-access) is bit 33: */ |
| 504 | is_write = (info->si_isr >> 33) & 1; |
| 505 | } |
| 506 | break; |
| 507 | |
| 508 | default: |
| 509 | break; |
| 510 | } |
| 511 | return handle_cpu_signal(ip, (unsigned long)info->si_addr, |
| 512 | is_write, |
| 513 | (sigset_t *)&uc->uc_sigmask, puc); |
| 514 | } |
| 515 | |
| 516 | #elif defined(__s390__) |
| 517 | |
| 518 | int cpu_signal_handler(int host_signum, void *pinfo, |
| 519 | void *puc) |
| 520 | { |
| 521 | siginfo_t *info = pinfo; |
| 522 | struct ucontext *uc = puc; |
| 523 | unsigned long pc; |
| 524 | uint16_t *pinsn; |
| 525 | int is_write = 0; |
| 526 | |
| 527 | pc = uc->uc_mcontext.psw.addr; |
| 528 | |
| 529 | /* ??? On linux, the non-rt signal handler has 4 (!) arguments instead |
| 530 | of the normal 2 arguments. The 3rd argument contains the "int_code" |
| 531 | from the hardware which does in fact contain the is_write value. |
| 532 | The rt signal handler, as far as I can tell, does not give this value |
| 533 | at all. Not that we could get to it from here even if it were. */ |
| 534 | /* ??? This is not even close to complete, since it ignores all |
| 535 | of the read-modify-write instructions. */ |
| 536 | pinsn = (uint16_t *)pc; |
| 537 | switch (pinsn[0] >> 8) { |
| 538 | case 0x50: /* ST */ |
| 539 | case 0x42: /* STC */ |
| 540 | case 0x40: /* STH */ |
| 541 | is_write = 1; |
| 542 | break; |
| 543 | case 0xc4: /* RIL format insns */ |
| 544 | switch (pinsn[0] & 0xf) { |
| 545 | case 0xf: /* STRL */ |
| 546 | case 0xb: /* STGRL */ |
| 547 | case 0x7: /* STHRL */ |
| 548 | is_write = 1; |
| 549 | } |
| 550 | break; |
| 551 | case 0xe3: /* RXY format insns */ |
| 552 | switch (pinsn[2] & 0xff) { |
| 553 | case 0x50: /* STY */ |
| 554 | case 0x24: /* STG */ |
| 555 | case 0x72: /* STCY */ |
| 556 | case 0x70: /* STHY */ |
| 557 | case 0x8e: /* STPQ */ |
| 558 | case 0x3f: /* STRVH */ |
| 559 | case 0x3e: /* STRV */ |
| 560 | case 0x2f: /* STRVG */ |
| 561 | is_write = 1; |
| 562 | } |
| 563 | break; |
| 564 | } |
| 565 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 566 | is_write, &uc->uc_sigmask, puc); |
| 567 | } |
| 568 | |
| 569 | #elif defined(__mips__) |
| 570 | |
| 571 | int cpu_signal_handler(int host_signum, void *pinfo, |
| 572 | void *puc) |
| 573 | { |
| 574 | siginfo_t *info = pinfo; |
| 575 | struct ucontext *uc = puc; |
| 576 | greg_t pc = uc->uc_mcontext.pc; |
| 577 | int is_write; |
| 578 | |
| 579 | /* XXX: compute is_write */ |
| 580 | is_write = 0; |
| 581 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 582 | is_write, &uc->uc_sigmask, puc); |
| 583 | } |
| 584 | |
| 585 | #elif defined(__hppa__) |
| 586 | |
| 587 | int cpu_signal_handler(int host_signum, void *pinfo, |
| 588 | void *puc) |
| 589 | { |
| 590 | struct siginfo *info = pinfo; |
| 591 | struct ucontext *uc = puc; |
| 592 | unsigned long pc = uc->uc_mcontext.sc_iaoq[0]; |
| 593 | uint32_t insn = *(uint32_t *)pc; |
| 594 | int is_write = 0; |
| 595 | |
| 596 | /* XXX: need kernel patch to get write flag faster. */ |
| 597 | switch (insn >> 26) { |
| 598 | case 0x1a: /* STW */ |
| 599 | case 0x19: /* STH */ |
| 600 | case 0x18: /* STB */ |
| 601 | case 0x1b: /* STWM */ |
| 602 | is_write = 1; |
| 603 | break; |
| 604 | |
| 605 | case 0x09: /* CSTWX, FSTWX, FSTWS */ |
| 606 | case 0x0b: /* CSTDX, FSTDX, FSTDS */ |
| 607 | /* Distinguish from coprocessor load ... */ |
| 608 | is_write = (insn >> 9) & 1; |
| 609 | break; |
| 610 | |
| 611 | case 0x03: |
| 612 | switch ((insn >> 6) & 15) { |
| 613 | case 0xa: /* STWS */ |
| 614 | case 0x9: /* STHS */ |
| 615 | case 0x8: /* STBS */ |
| 616 | case 0xe: /* STWAS */ |
| 617 | case 0xc: /* STBYS */ |
| 618 | is_write = 1; |
| 619 | } |
| 620 | break; |
| 621 | } |
| 622 | |
| 623 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 624 | is_write, &uc->uc_sigmask, puc); |
| 625 | } |
| 626 | |
| 627 | #else |
| 628 | |
| 629 | #error host CPU specific signal handler needed |
| 630 | |
| 631 | #endif |