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42a623c7 BS |
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" | |
3e457172 | 20 | #include "cpu.h" |
76cad711 | 21 | #include "disas/disas.h" |
42a623c7 | 22 | #include "tcg.h" |
023b0ae3 | 23 | #include "qemu/bitops.h" |
42a623c7 BS |
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 | ||
9349b4f9 | 41 | static void exception_action(CPUArchState *env1) |
1162c041 | 42 | { |
42a623c7 | 43 | #if defined(TARGET_I386) |
77b2bc2c | 44 | raise_exception_err(env1, env1->exception_index, env1->error_code); |
42a623c7 | 45 | #else |
1162c041 | 46 | cpu_loop_exit(env1); |
42a623c7 | 47 | #endif |
1162c041 | 48 | } |
42a623c7 BS |
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 | */ | |
9349b4f9 | 53 | void cpu_resume_from_signal(CPUArchState *env1, void *puc) |
42a623c7 BS |
54 | { |
55 | #ifdef __linux__ | |
56 | struct ucontext *uc = puc; | |
57 | #elif defined(__OpenBSD__) | |
58 | struct sigcontext *uc = puc; | |
59 | #endif | |
60 | ||
42a623c7 BS |
61 | if (puc) { |
62 | /* XXX: use siglongjmp ? */ | |
63 | #ifdef __linux__ | |
64 | #ifdef __ia64 | |
65 | sigprocmask(SIG_SETMASK, (sigset_t *)&uc->uc_sigmask, NULL); | |
66 | #else | |
67 | sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL); | |
68 | #endif | |
69 | #elif defined(__OpenBSD__) | |
70 | sigprocmask(SIG_SETMASK, &uc->sc_mask, NULL); | |
71 | #endif | |
72 | } | |
1846ec2c | 73 | env1->exception_index = -1; |
6ab7e546 | 74 | siglongjmp(env1->jmp_env, 1); |
42a623c7 BS |
75 | } |
76 | ||
77 | /* 'pc' is the host PC at which the exception was raised. 'address' is | |
78 | the effective address of the memory exception. 'is_write' is 1 if a | |
79 | write caused the exception and otherwise 0'. 'old_set' is the | |
80 | signal set which should be restored */ | |
20503968 | 81 | static inline int handle_cpu_signal(uintptr_t pc, unsigned long address, |
42a623c7 BS |
82 | int is_write, sigset_t *old_set, |
83 | void *puc) | |
84 | { | |
7510454e AF |
85 | CPUState *cpu; |
86 | CPUClass *cc; | |
4917cf44 | 87 | CPUArchState *env; |
42a623c7 BS |
88 | int ret; |
89 | ||
42a623c7 BS |
90 | #if defined(DEBUG_SIGNAL) |
91 | qemu_printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n", | |
92 | pc, address, is_write, *(unsigned long *)old_set); | |
93 | #endif | |
94 | /* XXX: locking issue */ | |
c5954819 PM |
95 | if (is_write && h2g_valid(address) |
96 | && page_unprotect(h2g(address), pc, puc)) { | |
42a623c7 BS |
97 | return 1; |
98 | } | |
99 | ||
732f9e89 AG |
100 | /* Convert forcefully to guest address space, invalid addresses |
101 | are still valid segv ones */ | |
102 | address = h2g_nocheck(address); | |
103 | ||
7510454e AF |
104 | cpu = current_cpu; |
105 | cc = CPU_GET_CLASS(cpu); | |
106 | env = cpu->env_ptr; | |
42a623c7 | 107 | /* see if it is an MMU fault */ |
7510454e AF |
108 | g_assert(cc->handle_mmu_fault); |
109 | ret = cc->handle_mmu_fault(cpu, address, is_write, MMU_USER_IDX); | |
42a623c7 BS |
110 | if (ret < 0) { |
111 | return 0; /* not an MMU fault */ | |
112 | } | |
113 | if (ret == 0) { | |
114 | return 1; /* the MMU fault was handled without causing real CPU fault */ | |
115 | } | |
116 | /* now we have a real cpu fault */ | |
4917cf44 | 117 | cpu_restore_state(env, pc); |
42a623c7 BS |
118 | |
119 | /* we restore the process signal mask as the sigreturn should | |
120 | do it (XXX: use sigsetjmp) */ | |
121 | sigprocmask(SIG_SETMASK, old_set, NULL); | |
4917cf44 | 122 | exception_action(env); |
42a623c7 BS |
123 | |
124 | /* never comes here */ | |
125 | return 1; | |
126 | } | |
127 | ||
128 | #if defined(__i386__) | |
129 | ||
130 | #if defined(__APPLE__) | |
131 | #include <sys/ucontext.h> | |
132 | ||
133 | #define EIP_sig(context) (*((unsigned long *)&(context)->uc_mcontext->ss.eip)) | |
134 | #define TRAP_sig(context) ((context)->uc_mcontext->es.trapno) | |
135 | #define ERROR_sig(context) ((context)->uc_mcontext->es.err) | |
136 | #define MASK_sig(context) ((context)->uc_sigmask) | |
137 | #elif defined(__NetBSD__) | |
138 | #include <ucontext.h> | |
139 | ||
140 | #define EIP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EIP]) | |
141 | #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO]) | |
142 | #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR]) | |
143 | #define MASK_sig(context) ((context)->uc_sigmask) | |
144 | #elif defined(__FreeBSD__) || defined(__DragonFly__) | |
145 | #include <ucontext.h> | |
146 | ||
147 | #define EIP_sig(context) (*((unsigned long *)&(context)->uc_mcontext.mc_eip)) | |
148 | #define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno) | |
149 | #define ERROR_sig(context) ((context)->uc_mcontext.mc_err) | |
150 | #define MASK_sig(context) ((context)->uc_sigmask) | |
151 | #elif defined(__OpenBSD__) | |
152 | #define EIP_sig(context) ((context)->sc_eip) | |
153 | #define TRAP_sig(context) ((context)->sc_trapno) | |
154 | #define ERROR_sig(context) ((context)->sc_err) | |
155 | #define MASK_sig(context) ((context)->sc_mask) | |
156 | #else | |
157 | #define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP]) | |
158 | #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO]) | |
159 | #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR]) | |
160 | #define MASK_sig(context) ((context)->uc_sigmask) | |
161 | #endif | |
162 | ||
163 | int cpu_signal_handler(int host_signum, void *pinfo, | |
164 | void *puc) | |
165 | { | |
166 | siginfo_t *info = pinfo; | |
167 | #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) | |
168 | ucontext_t *uc = puc; | |
169 | #elif defined(__OpenBSD__) | |
170 | struct sigcontext *uc = puc; | |
171 | #else | |
172 | struct ucontext *uc = puc; | |
173 | #endif | |
174 | unsigned long pc; | |
175 | int trapno; | |
176 | ||
177 | #ifndef REG_EIP | |
178 | /* for glibc 2.1 */ | |
179 | #define REG_EIP EIP | |
180 | #define REG_ERR ERR | |
181 | #define REG_TRAPNO TRAPNO | |
182 | #endif | |
183 | pc = EIP_sig(uc); | |
184 | trapno = TRAP_sig(uc); | |
185 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
186 | trapno == 0xe ? | |
187 | (ERROR_sig(uc) >> 1) & 1 : 0, | |
188 | &MASK_sig(uc), puc); | |
189 | } | |
190 | ||
191 | #elif defined(__x86_64__) | |
192 | ||
193 | #ifdef __NetBSD__ | |
194 | #define PC_sig(context) _UC_MACHINE_PC(context) | |
195 | #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO]) | |
196 | #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR]) | |
197 | #define MASK_sig(context) ((context)->uc_sigmask) | |
198 | #elif defined(__OpenBSD__) | |
199 | #define PC_sig(context) ((context)->sc_rip) | |
200 | #define TRAP_sig(context) ((context)->sc_trapno) | |
201 | #define ERROR_sig(context) ((context)->sc_err) | |
202 | #define MASK_sig(context) ((context)->sc_mask) | |
203 | #elif defined(__FreeBSD__) || defined(__DragonFly__) | |
204 | #include <ucontext.h> | |
205 | ||
206 | #define PC_sig(context) (*((unsigned long *)&(context)->uc_mcontext.mc_rip)) | |
207 | #define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno) | |
208 | #define ERROR_sig(context) ((context)->uc_mcontext.mc_err) | |
209 | #define MASK_sig(context) ((context)->uc_sigmask) | |
210 | #else | |
211 | #define PC_sig(context) ((context)->uc_mcontext.gregs[REG_RIP]) | |
212 | #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO]) | |
213 | #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR]) | |
214 | #define MASK_sig(context) ((context)->uc_sigmask) | |
215 | #endif | |
216 | ||
217 | int cpu_signal_handler(int host_signum, void *pinfo, | |
218 | void *puc) | |
219 | { | |
220 | siginfo_t *info = pinfo; | |
221 | unsigned long pc; | |
222 | #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) | |
223 | ucontext_t *uc = puc; | |
224 | #elif defined(__OpenBSD__) | |
225 | struct sigcontext *uc = puc; | |
226 | #else | |
227 | struct ucontext *uc = puc; | |
228 | #endif | |
229 | ||
230 | pc = PC_sig(uc); | |
231 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
232 | TRAP_sig(uc) == 0xe ? | |
233 | (ERROR_sig(uc) >> 1) & 1 : 0, | |
234 | &MASK_sig(uc), puc); | |
235 | } | |
236 | ||
237 | #elif defined(_ARCH_PPC) | |
238 | ||
239 | /*********************************************************************** | |
240 | * signal context platform-specific definitions | |
241 | * From Wine | |
242 | */ | |
243 | #ifdef linux | |
244 | /* All Registers access - only for local access */ | |
245 | #define REG_sig(reg_name, context) \ | |
246 | ((context)->uc_mcontext.regs->reg_name) | |
247 | /* Gpr Registers access */ | |
248 | #define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context) | |
249 | /* Program counter */ | |
250 | #define IAR_sig(context) REG_sig(nip, context) | |
251 | /* Machine State Register (Supervisor) */ | |
252 | #define MSR_sig(context) REG_sig(msr, context) | |
253 | /* Count register */ | |
254 | #define CTR_sig(context) REG_sig(ctr, context) | |
255 | /* User's integer exception register */ | |
256 | #define XER_sig(context) REG_sig(xer, context) | |
257 | /* Link register */ | |
258 | #define LR_sig(context) REG_sig(link, context) | |
259 | /* Condition register */ | |
260 | #define CR_sig(context) REG_sig(ccr, context) | |
261 | ||
262 | /* Float Registers access */ | |
263 | #define FLOAT_sig(reg_num, context) \ | |
264 | (((double *)((char *)((context)->uc_mcontext.regs + 48 * 4)))[reg_num]) | |
265 | #define FPSCR_sig(context) \ | |
266 | (*(int *)((char *)((context)->uc_mcontext.regs + (48 + 32 * 2) * 4))) | |
267 | /* Exception Registers access */ | |
268 | #define DAR_sig(context) REG_sig(dar, context) | |
269 | #define DSISR_sig(context) REG_sig(dsisr, context) | |
270 | #define TRAP_sig(context) REG_sig(trap, context) | |
271 | #endif /* linux */ | |
272 | ||
273 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) | |
274 | #include <ucontext.h> | |
275 | #define IAR_sig(context) ((context)->uc_mcontext.mc_srr0) | |
276 | #define MSR_sig(context) ((context)->uc_mcontext.mc_srr1) | |
277 | #define CTR_sig(context) ((context)->uc_mcontext.mc_ctr) | |
278 | #define XER_sig(context) ((context)->uc_mcontext.mc_xer) | |
279 | #define LR_sig(context) ((context)->uc_mcontext.mc_lr) | |
280 | #define CR_sig(context) ((context)->uc_mcontext.mc_cr) | |
281 | /* Exception Registers access */ | |
282 | #define DAR_sig(context) ((context)->uc_mcontext.mc_dar) | |
283 | #define DSISR_sig(context) ((context)->uc_mcontext.mc_dsisr) | |
284 | #define TRAP_sig(context) ((context)->uc_mcontext.mc_exc) | |
285 | #endif /* __FreeBSD__|| __FreeBSD_kernel__ */ | |
286 | ||
287 | #ifdef __APPLE__ | |
288 | #include <sys/ucontext.h> | |
289 | typedef struct ucontext SIGCONTEXT; | |
290 | /* All Registers access - only for local access */ | |
291 | #define REG_sig(reg_name, context) \ | |
292 | ((context)->uc_mcontext->ss.reg_name) | |
293 | #define FLOATREG_sig(reg_name, context) \ | |
294 | ((context)->uc_mcontext->fs.reg_name) | |
295 | #define EXCEPREG_sig(reg_name, context) \ | |
296 | ((context)->uc_mcontext->es.reg_name) | |
297 | #define VECREG_sig(reg_name, context) \ | |
298 | ((context)->uc_mcontext->vs.reg_name) | |
299 | /* Gpr Registers access */ | |
300 | #define GPR_sig(reg_num, context) REG_sig(r##reg_num, context) | |
301 | /* Program counter */ | |
302 | #define IAR_sig(context) REG_sig(srr0, context) | |
303 | /* Machine State Register (Supervisor) */ | |
304 | #define MSR_sig(context) REG_sig(srr1, context) | |
305 | #define CTR_sig(context) REG_sig(ctr, context) | |
306 | /* Link register */ | |
307 | #define XER_sig(context) REG_sig(xer, context) | |
308 | /* User's integer exception register */ | |
309 | #define LR_sig(context) REG_sig(lr, context) | |
310 | /* Condition register */ | |
311 | #define CR_sig(context) REG_sig(cr, context) | |
312 | /* Float Registers access */ | |
313 | #define FLOAT_sig(reg_num, context) \ | |
314 | FLOATREG_sig(fpregs[reg_num], context) | |
315 | #define FPSCR_sig(context) \ | |
316 | ((double)FLOATREG_sig(fpscr, context)) | |
317 | /* Exception Registers access */ | |
318 | /* Fault registers for coredump */ | |
319 | #define DAR_sig(context) EXCEPREG_sig(dar, context) | |
320 | #define DSISR_sig(context) EXCEPREG_sig(dsisr, context) | |
321 | /* number of powerpc exception taken */ | |
322 | #define TRAP_sig(context) EXCEPREG_sig(exception, context) | |
323 | #endif /* __APPLE__ */ | |
324 | ||
325 | int cpu_signal_handler(int host_signum, void *pinfo, | |
326 | void *puc) | |
327 | { | |
328 | siginfo_t *info = pinfo; | |
329 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) | |
330 | ucontext_t *uc = puc; | |
331 | #else | |
332 | struct ucontext *uc = puc; | |
333 | #endif | |
334 | unsigned long pc; | |
335 | int is_write; | |
336 | ||
337 | pc = IAR_sig(uc); | |
338 | is_write = 0; | |
339 | #if 0 | |
340 | /* ppc 4xx case */ | |
341 | if (DSISR_sig(uc) & 0x00800000) { | |
342 | is_write = 1; | |
343 | } | |
344 | #else | |
345 | if (TRAP_sig(uc) != 0x400 && (DSISR_sig(uc) & 0x02000000)) { | |
346 | is_write = 1; | |
347 | } | |
348 | #endif | |
349 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
350 | is_write, &uc->uc_sigmask, puc); | |
351 | } | |
352 | ||
353 | #elif defined(__alpha__) | |
354 | ||
355 | int cpu_signal_handler(int host_signum, void *pinfo, | |
356 | void *puc) | |
357 | { | |
358 | siginfo_t *info = pinfo; | |
359 | struct ucontext *uc = puc; | |
360 | uint32_t *pc = uc->uc_mcontext.sc_pc; | |
361 | uint32_t insn = *pc; | |
362 | int is_write = 0; | |
363 | ||
364 | /* XXX: need kernel patch to get write flag faster */ | |
365 | switch (insn >> 26) { | |
366 | case 0x0d: /* stw */ | |
367 | case 0x0e: /* stb */ | |
368 | case 0x0f: /* stq_u */ | |
369 | case 0x24: /* stf */ | |
370 | case 0x25: /* stg */ | |
371 | case 0x26: /* sts */ | |
372 | case 0x27: /* stt */ | |
373 | case 0x2c: /* stl */ | |
374 | case 0x2d: /* stq */ | |
375 | case 0x2e: /* stl_c */ | |
376 | case 0x2f: /* stq_c */ | |
377 | is_write = 1; | |
378 | } | |
379 | ||
380 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
381 | is_write, &uc->uc_sigmask, puc); | |
382 | } | |
383 | #elif defined(__sparc__) | |
384 | ||
385 | int cpu_signal_handler(int host_signum, void *pinfo, | |
386 | void *puc) | |
387 | { | |
388 | siginfo_t *info = pinfo; | |
389 | int is_write; | |
390 | uint32_t insn; | |
391 | #if !defined(__arch64__) || defined(CONFIG_SOLARIS) | |
392 | uint32_t *regs = (uint32_t *)(info + 1); | |
393 | void *sigmask = (regs + 20); | |
394 | /* XXX: is there a standard glibc define ? */ | |
395 | unsigned long pc = regs[1]; | |
396 | #else | |
397 | #ifdef __linux__ | |
398 | struct sigcontext *sc = puc; | |
399 | unsigned long pc = sc->sigc_regs.tpc; | |
400 | void *sigmask = (void *)sc->sigc_mask; | |
401 | #elif defined(__OpenBSD__) | |
402 | struct sigcontext *uc = puc; | |
403 | unsigned long pc = uc->sc_pc; | |
404 | void *sigmask = (void *)(long)uc->sc_mask; | |
405 | #endif | |
406 | #endif | |
407 | ||
408 | /* XXX: need kernel patch to get write flag faster */ | |
409 | is_write = 0; | |
410 | insn = *(uint32_t *)pc; | |
411 | if ((insn >> 30) == 3) { | |
412 | switch ((insn >> 19) & 0x3f) { | |
413 | case 0x05: /* stb */ | |
414 | case 0x15: /* stba */ | |
415 | case 0x06: /* sth */ | |
416 | case 0x16: /* stha */ | |
417 | case 0x04: /* st */ | |
418 | case 0x14: /* sta */ | |
419 | case 0x07: /* std */ | |
420 | case 0x17: /* stda */ | |
421 | case 0x0e: /* stx */ | |
422 | case 0x1e: /* stxa */ | |
423 | case 0x24: /* stf */ | |
424 | case 0x34: /* stfa */ | |
425 | case 0x27: /* stdf */ | |
426 | case 0x37: /* stdfa */ | |
427 | case 0x26: /* stqf */ | |
428 | case 0x36: /* stqfa */ | |
429 | case 0x25: /* stfsr */ | |
430 | case 0x3c: /* casa */ | |
431 | case 0x3e: /* casxa */ | |
432 | is_write = 1; | |
433 | break; | |
434 | } | |
435 | } | |
436 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
437 | is_write, sigmask, NULL); | |
438 | } | |
439 | ||
440 | #elif defined(__arm__) | |
441 | ||
442 | int cpu_signal_handler(int host_signum, void *pinfo, | |
443 | void *puc) | |
444 | { | |
445 | siginfo_t *info = pinfo; | |
446 | struct ucontext *uc = puc; | |
447 | unsigned long pc; | |
448 | int is_write; | |
449 | ||
e12cdb1b | 450 | #if defined(__GLIBC__) && (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 3)) |
42a623c7 BS |
451 | pc = uc->uc_mcontext.gregs[R15]; |
452 | #else | |
453 | pc = uc->uc_mcontext.arm_pc; | |
454 | #endif | |
023b0ae3 PM |
455 | |
456 | /* error_code is the FSR value, in which bit 11 is WnR (assuming a v6 or | |
457 | * later processor; on v5 we will always report this as a read). | |
458 | */ | |
459 | is_write = extract32(uc->uc_mcontext.error_code, 11, 1); | |
42a623c7 BS |
460 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
461 | is_write, | |
462 | &uc->uc_sigmask, puc); | |
463 | } | |
464 | ||
f129061c CF |
465 | #elif defined(__aarch64__) |
466 | ||
467 | int cpu_signal_handler(int host_signum, void *pinfo, | |
468 | void *puc) | |
469 | { | |
470 | siginfo_t *info = pinfo; | |
471 | struct ucontext *uc = puc; | |
472 | uint64_t pc; | |
473 | int is_write = 0; /* XXX how to determine? */ | |
474 | ||
475 | pc = uc->uc_mcontext.pc; | |
476 | return handle_cpu_signal(pc, (uint64_t)info->si_addr, | |
477 | is_write, &uc->uc_sigmask, puc); | |
478 | } | |
479 | ||
42a623c7 BS |
480 | #elif defined(__mc68000) |
481 | ||
482 | int cpu_signal_handler(int host_signum, void *pinfo, | |
483 | void *puc) | |
484 | { | |
485 | siginfo_t *info = pinfo; | |
486 | struct ucontext *uc = puc; | |
487 | unsigned long pc; | |
488 | int is_write; | |
489 | ||
490 | pc = uc->uc_mcontext.gregs[16]; | |
491 | /* XXX: compute is_write */ | |
492 | is_write = 0; | |
493 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
494 | is_write, | |
495 | &uc->uc_sigmask, puc); | |
496 | } | |
497 | ||
498 | #elif defined(__ia64) | |
499 | ||
500 | #ifndef __ISR_VALID | |
501 | /* This ought to be in <bits/siginfo.h>... */ | |
502 | # define __ISR_VALID 1 | |
503 | #endif | |
504 | ||
505 | int cpu_signal_handler(int host_signum, void *pinfo, void *puc) | |
506 | { | |
507 | siginfo_t *info = pinfo; | |
508 | struct ucontext *uc = puc; | |
509 | unsigned long ip; | |
510 | int is_write = 0; | |
511 | ||
512 | ip = uc->uc_mcontext.sc_ip; | |
513 | switch (host_signum) { | |
514 | case SIGILL: | |
515 | case SIGFPE: | |
516 | case SIGSEGV: | |
517 | case SIGBUS: | |
518 | case SIGTRAP: | |
519 | if (info->si_code && (info->si_segvflags & __ISR_VALID)) { | |
520 | /* ISR.W (write-access) is bit 33: */ | |
521 | is_write = (info->si_isr >> 33) & 1; | |
522 | } | |
523 | break; | |
524 | ||
525 | default: | |
526 | break; | |
527 | } | |
528 | return handle_cpu_signal(ip, (unsigned long)info->si_addr, | |
529 | is_write, | |
530 | (sigset_t *)&uc->uc_sigmask, puc); | |
531 | } | |
532 | ||
533 | #elif defined(__s390__) | |
534 | ||
535 | int cpu_signal_handler(int host_signum, void *pinfo, | |
536 | void *puc) | |
537 | { | |
538 | siginfo_t *info = pinfo; | |
539 | struct ucontext *uc = puc; | |
540 | unsigned long pc; | |
541 | uint16_t *pinsn; | |
542 | int is_write = 0; | |
543 | ||
544 | pc = uc->uc_mcontext.psw.addr; | |
545 | ||
546 | /* ??? On linux, the non-rt signal handler has 4 (!) arguments instead | |
547 | of the normal 2 arguments. The 3rd argument contains the "int_code" | |
548 | from the hardware which does in fact contain the is_write value. | |
549 | The rt signal handler, as far as I can tell, does not give this value | |
550 | at all. Not that we could get to it from here even if it were. */ | |
551 | /* ??? This is not even close to complete, since it ignores all | |
552 | of the read-modify-write instructions. */ | |
553 | pinsn = (uint16_t *)pc; | |
554 | switch (pinsn[0] >> 8) { | |
555 | case 0x50: /* ST */ | |
556 | case 0x42: /* STC */ | |
557 | case 0x40: /* STH */ | |
558 | is_write = 1; | |
559 | break; | |
560 | case 0xc4: /* RIL format insns */ | |
561 | switch (pinsn[0] & 0xf) { | |
562 | case 0xf: /* STRL */ | |
563 | case 0xb: /* STGRL */ | |
564 | case 0x7: /* STHRL */ | |
565 | is_write = 1; | |
566 | } | |
567 | break; | |
568 | case 0xe3: /* RXY format insns */ | |
569 | switch (pinsn[2] & 0xff) { | |
570 | case 0x50: /* STY */ | |
571 | case 0x24: /* STG */ | |
572 | case 0x72: /* STCY */ | |
573 | case 0x70: /* STHY */ | |
574 | case 0x8e: /* STPQ */ | |
575 | case 0x3f: /* STRVH */ | |
576 | case 0x3e: /* STRV */ | |
577 | case 0x2f: /* STRVG */ | |
578 | is_write = 1; | |
579 | } | |
580 | break; | |
581 | } | |
582 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
583 | is_write, &uc->uc_sigmask, puc); | |
584 | } | |
585 | ||
586 | #elif defined(__mips__) | |
587 | ||
588 | int cpu_signal_handler(int host_signum, void *pinfo, | |
589 | void *puc) | |
590 | { | |
591 | siginfo_t *info = pinfo; | |
592 | struct ucontext *uc = puc; | |
593 | greg_t pc = uc->uc_mcontext.pc; | |
594 | int is_write; | |
595 | ||
596 | /* XXX: compute is_write */ | |
597 | is_write = 0; | |
598 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
599 | is_write, &uc->uc_sigmask, puc); | |
600 | } | |
601 | ||
602 | #elif defined(__hppa__) | |
603 | ||
604 | int cpu_signal_handler(int host_signum, void *pinfo, | |
605 | void *puc) | |
606 | { | |
02d2bd5d | 607 | siginfo_t *info = pinfo; |
42a623c7 BS |
608 | struct ucontext *uc = puc; |
609 | unsigned long pc = uc->uc_mcontext.sc_iaoq[0]; | |
610 | uint32_t insn = *(uint32_t *)pc; | |
611 | int is_write = 0; | |
612 | ||
613 | /* XXX: need kernel patch to get write flag faster. */ | |
614 | switch (insn >> 26) { | |
615 | case 0x1a: /* STW */ | |
616 | case 0x19: /* STH */ | |
617 | case 0x18: /* STB */ | |
618 | case 0x1b: /* STWM */ | |
619 | is_write = 1; | |
620 | break; | |
621 | ||
622 | case 0x09: /* CSTWX, FSTWX, FSTWS */ | |
623 | case 0x0b: /* CSTDX, FSTDX, FSTDS */ | |
624 | /* Distinguish from coprocessor load ... */ | |
625 | is_write = (insn >> 9) & 1; | |
626 | break; | |
627 | ||
628 | case 0x03: | |
629 | switch ((insn >> 6) & 15) { | |
630 | case 0xa: /* STWS */ | |
631 | case 0x9: /* STHS */ | |
632 | case 0x8: /* STBS */ | |
633 | case 0xe: /* STWAS */ | |
634 | case 0xc: /* STBYS */ | |
635 | is_write = 1; | |
636 | } | |
637 | break; | |
638 | } | |
639 | ||
640 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
641 | is_write, &uc->uc_sigmask, puc); | |
642 | } | |
643 | ||
644 | #else | |
645 | ||
646 | #error host CPU specific signal handler needed | |
647 | ||
648 | #endif |