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tcg: Remove duplicate #if !defined(CODE_ACCESS)
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CommitLineData
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
fb0343d5 9 * version 2.1 of the License, or (at your option) any later version.
42a623c7
BS
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 */
d38ea87a 19#include "qemu/osdep.h"
3e457172 20#include "cpu.h"
76cad711 21#include "disas/disas.h"
63c91552 22#include "exec/exec-all.h"
42a623c7 23#include "tcg.h"
023b0ae3 24#include "qemu/bitops.h"
f08b6170 25#include "exec/cpu_ldst.h"
1652b974 26#include "translate-all.h"
a411d296 27#include "exec/helper-proto.h"
e6cd4bb5 28#include "qemu/atomic128.h"
42a623c7
BS
29
30#undef EAX
31#undef ECX
32#undef EDX
33#undef EBX
34#undef ESP
35#undef EBP
36#undef ESI
37#undef EDI
38#undef EIP
42a623c7
BS
39#ifdef __linux__
40#include <sys/ucontext.h>
41#endif
42
ec603b55
RH
43__thread uintptr_t helper_retaddr;
44
42a623c7
BS
45//#define DEBUG_SIGNAL
46
42a623c7
BS
47/* exit the current TB from a signal handler. The host registers are
48 restored in a state compatible with the CPU emulator
49 */
a5852dc5 50static void cpu_exit_tb_from_sighandler(CPUState *cpu, sigset_t *old_set)
42a623c7 51{
f213e72f 52 /* XXX: use siglongjmp ? */
a5852dc5 53 sigprocmask(SIG_SETMASK, old_set, NULL);
6886b980 54 cpu_loop_exit_noexc(cpu);
42a623c7
BS
55}
56
57/* 'pc' is the host PC at which the exception was raised. 'address' is
58 the effective address of the memory exception. 'is_write' is 1 if a
59 write caused the exception and otherwise 0'. 'old_set' is the
60 signal set which should be restored */
a78b1299 61static inline int handle_cpu_signal(uintptr_t pc, siginfo_t *info,
a5852dc5 62 int is_write, sigset_t *old_set)
42a623c7 63{
02bed6bd 64 CPUState *cpu = current_cpu;
7510454e 65 CPUClass *cc;
a78b1299 66 unsigned long address = (unsigned long)info->si_addr;
da6bbf85 67 MMUAccessType access_type;
42a623c7 68
ec603b55
RH
69 /* We must handle PC addresses from two different sources:
70 * a call return address and a signal frame address.
71 *
72 * Within cpu_restore_state_from_tb we assume the former and adjust
73 * the address by -GETPC_ADJ so that the address is within the call
74 * insn so that addr does not accidentally match the beginning of the
75 * next guest insn.
76 *
77 * However, when the PC comes from the signal frame, it points to
78 * the actual faulting host insn and not a call insn. Subtracting
79 * GETPC_ADJ in that case may accidentally match the previous guest insn.
80 *
81 * So for the later case, adjust forward to compensate for what
82 * will be done later by cpu_restore_state_from_tb.
83 */
84 if (helper_retaddr) {
85 pc = helper_retaddr;
86 } else {
87 pc += GETPC_ADJ;
88 }
89
02bed6bd
AB
90 /* For synchronous signals we expect to be coming from the vCPU
91 * thread (so current_cpu should be valid) and either from running
92 * code or during translation which can fault as we cross pages.
93 *
94 * If neither is true then something has gone wrong and we should
95 * abort rather than try and restart the vCPU execution.
96 */
97 if (!cpu || !cpu->running) {
98 printf("qemu:%s received signal outside vCPU context @ pc=0x%"
99 PRIxPTR "\n", __func__, pc);
100 abort();
101 }
102
42a623c7 103#if defined(DEBUG_SIGNAL)
71baf787
PM
104 printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
105 pc, address, is_write, *(unsigned long *)old_set);
42a623c7
BS
106#endif
107 /* XXX: locking issue */
9c4bbee9
PM
108 /* Note that it is important that we don't call page_unprotect() unless
109 * this is really a "write to nonwriteable page" fault, because
110 * page_unprotect() assumes that if it is called for an access to
111 * a page that's writeable this means we had two threads racing and
112 * another thread got there first and already made the page writeable;
113 * so we will retry the access. If we were to call page_unprotect()
114 * for some other kind of fault that should really be passed to the
115 * guest, we'd end up in an infinite loop of retrying the faulting
116 * access.
117 */
118 if (is_write && info->si_signo == SIGSEGV && info->si_code == SEGV_ACCERR &&
119 h2g_valid(address)) {
f213e72f
PM
120 switch (page_unprotect(h2g(address), pc)) {
121 case 0:
122 /* Fault not caused by a page marked unwritable to protect
ec603b55 123 * cached translations, must be the guest binary's problem.
f213e72f
PM
124 */
125 break;
126 case 1:
127 /* Fault caused by protection of cached translation; TBs
ec603b55
RH
128 * invalidated, so resume execution. Retain helper_retaddr
129 * for a possible second fault.
f213e72f
PM
130 */
131 return 1;
132 case 2:
133 /* Fault caused by protection of cached translation, and the
134 * currently executing TB was modified and must be exited
ec603b55 135 * immediately. Clear helper_retaddr for next execution.
f213e72f 136 */
08b97f7f 137 clear_helper_retaddr();
02bed6bd 138 cpu_exit_tb_from_sighandler(cpu, old_set);
ec603b55
RH
139 /* NORETURN */
140
f213e72f
PM
141 default:
142 g_assert_not_reached();
143 }
42a623c7
BS
144 }
145
732f9e89
AG
146 /* Convert forcefully to guest address space, invalid addresses
147 are still valid segv ones */
148 address = h2g_nocheck(address);
149
da6bbf85
RH
150 /*
151 * There is no way the target can handle this other than raising
152 * an exception. Undo signal and retaddr state prior to longjmp.
ec603b55 153 */
da6bbf85 154 sigprocmask(SIG_SETMASK, old_set, NULL);
08b97f7f 155 clear_helper_retaddr();
ec603b55 156
da6bbf85 157 cc = CPU_GET_CLASS(cpu);
69963f57
RH
158 access_type = is_write ? MMU_DATA_STORE : MMU_DATA_LOAD;
159 cc->tlb_fill(cpu, address, 0, access_type, MMU_USER_IDX, false, pc);
160 g_assert_not_reached();
42a623c7
BS
161}
162
163#if defined(__i386__)
164
c5679026 165#if defined(__NetBSD__)
42a623c7
BS
166#include <ucontext.h>
167
168#define EIP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EIP])
169#define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
170#define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
171#define MASK_sig(context) ((context)->uc_sigmask)
172#elif defined(__FreeBSD__) || defined(__DragonFly__)
173#include <ucontext.h>
174
175#define EIP_sig(context) (*((unsigned long *)&(context)->uc_mcontext.mc_eip))
176#define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
177#define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
178#define MASK_sig(context) ((context)->uc_sigmask)
179#elif defined(__OpenBSD__)
180#define EIP_sig(context) ((context)->sc_eip)
181#define TRAP_sig(context) ((context)->sc_trapno)
182#define ERROR_sig(context) ((context)->sc_err)
183#define MASK_sig(context) ((context)->sc_mask)
184#else
185#define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
186#define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
187#define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
188#define MASK_sig(context) ((context)->uc_sigmask)
189#endif
190
191int cpu_signal_handler(int host_signum, void *pinfo,
192 void *puc)
193{
194 siginfo_t *info = pinfo;
195#if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
196 ucontext_t *uc = puc;
197#elif defined(__OpenBSD__)
198 struct sigcontext *uc = puc;
199#else
04b33e21 200 ucontext_t *uc = puc;
42a623c7
BS
201#endif
202 unsigned long pc;
203 int trapno;
204
205#ifndef REG_EIP
206/* for glibc 2.1 */
207#define REG_EIP EIP
208#define REG_ERR ERR
209#define REG_TRAPNO TRAPNO
210#endif
211 pc = EIP_sig(uc);
212 trapno = TRAP_sig(uc);
a78b1299
PM
213 return handle_cpu_signal(pc, info,
214 trapno == 0xe ? (ERROR_sig(uc) >> 1) & 1 : 0,
a5852dc5 215 &MASK_sig(uc));
42a623c7
BS
216}
217
218#elif defined(__x86_64__)
219
220#ifdef __NetBSD__
221#define PC_sig(context) _UC_MACHINE_PC(context)
222#define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
223#define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
224#define MASK_sig(context) ((context)->uc_sigmask)
225#elif defined(__OpenBSD__)
226#define PC_sig(context) ((context)->sc_rip)
227#define TRAP_sig(context) ((context)->sc_trapno)
228#define ERROR_sig(context) ((context)->sc_err)
229#define MASK_sig(context) ((context)->sc_mask)
230#elif defined(__FreeBSD__) || defined(__DragonFly__)
231#include <ucontext.h>
232
233#define PC_sig(context) (*((unsigned long *)&(context)->uc_mcontext.mc_rip))
234#define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
235#define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
236#define MASK_sig(context) ((context)->uc_sigmask)
237#else
238#define PC_sig(context) ((context)->uc_mcontext.gregs[REG_RIP])
239#define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
240#define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
241#define MASK_sig(context) ((context)->uc_sigmask)
242#endif
243
244int cpu_signal_handler(int host_signum, void *pinfo,
245 void *puc)
246{
247 siginfo_t *info = pinfo;
248 unsigned long pc;
249#if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
250 ucontext_t *uc = puc;
251#elif defined(__OpenBSD__)
252 struct sigcontext *uc = puc;
253#else
04b33e21 254 ucontext_t *uc = puc;
42a623c7
BS
255#endif
256
257 pc = PC_sig(uc);
a78b1299
PM
258 return handle_cpu_signal(pc, info,
259 TRAP_sig(uc) == 0xe ? (ERROR_sig(uc) >> 1) & 1 : 0,
a5852dc5 260 &MASK_sig(uc));
42a623c7
BS
261}
262
263#elif defined(_ARCH_PPC)
264
265/***********************************************************************
266 * signal context platform-specific definitions
267 * From Wine
268 */
269#ifdef linux
270/* All Registers access - only for local access */
271#define REG_sig(reg_name, context) \
272 ((context)->uc_mcontext.regs->reg_name)
273/* Gpr Registers access */
274#define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
275/* Program counter */
276#define IAR_sig(context) REG_sig(nip, context)
277/* Machine State Register (Supervisor) */
278#define MSR_sig(context) REG_sig(msr, context)
279/* Count register */
280#define CTR_sig(context) REG_sig(ctr, context)
281/* User's integer exception register */
282#define XER_sig(context) REG_sig(xer, context)
283/* Link register */
284#define LR_sig(context) REG_sig(link, context)
285/* Condition register */
286#define CR_sig(context) REG_sig(ccr, context)
287
288/* Float Registers access */
289#define FLOAT_sig(reg_num, context) \
290 (((double *)((char *)((context)->uc_mcontext.regs + 48 * 4)))[reg_num])
291#define FPSCR_sig(context) \
292 (*(int *)((char *)((context)->uc_mcontext.regs + (48 + 32 * 2) * 4)))
293/* Exception Registers access */
294#define DAR_sig(context) REG_sig(dar, context)
295#define DSISR_sig(context) REG_sig(dsisr, context)
296#define TRAP_sig(context) REG_sig(trap, context)
297#endif /* linux */
298
299#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
300#include <ucontext.h>
301#define IAR_sig(context) ((context)->uc_mcontext.mc_srr0)
302#define MSR_sig(context) ((context)->uc_mcontext.mc_srr1)
303#define CTR_sig(context) ((context)->uc_mcontext.mc_ctr)
304#define XER_sig(context) ((context)->uc_mcontext.mc_xer)
305#define LR_sig(context) ((context)->uc_mcontext.mc_lr)
306#define CR_sig(context) ((context)->uc_mcontext.mc_cr)
307/* Exception Registers access */
308#define DAR_sig(context) ((context)->uc_mcontext.mc_dar)
309#define DSISR_sig(context) ((context)->uc_mcontext.mc_dsisr)
310#define TRAP_sig(context) ((context)->uc_mcontext.mc_exc)
311#endif /* __FreeBSD__|| __FreeBSD_kernel__ */
312
42a623c7
BS
313int cpu_signal_handler(int host_signum, void *pinfo,
314 void *puc)
315{
316 siginfo_t *info = pinfo;
317#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
318 ucontext_t *uc = puc;
319#else
04b33e21 320 ucontext_t *uc = puc;
42a623c7
BS
321#endif
322 unsigned long pc;
323 int is_write;
324
325 pc = IAR_sig(uc);
326 is_write = 0;
327#if 0
328 /* ppc 4xx case */
329 if (DSISR_sig(uc) & 0x00800000) {
330 is_write = 1;
331 }
332#else
333 if (TRAP_sig(uc) != 0x400 && (DSISR_sig(uc) & 0x02000000)) {
334 is_write = 1;
335 }
336#endif
a78b1299 337 return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask);
42a623c7
BS
338}
339
340#elif defined(__alpha__)
341
342int cpu_signal_handler(int host_signum, void *pinfo,
343 void *puc)
344{
345 siginfo_t *info = pinfo;
04b33e21 346 ucontext_t *uc = puc;
42a623c7
BS
347 uint32_t *pc = uc->uc_mcontext.sc_pc;
348 uint32_t insn = *pc;
349 int is_write = 0;
350
351 /* XXX: need kernel patch to get write flag faster */
352 switch (insn >> 26) {
353 case 0x0d: /* stw */
354 case 0x0e: /* stb */
355 case 0x0f: /* stq_u */
356 case 0x24: /* stf */
357 case 0x25: /* stg */
358 case 0x26: /* sts */
359 case 0x27: /* stt */
360 case 0x2c: /* stl */
361 case 0x2d: /* stq */
362 case 0x2e: /* stl_c */
363 case 0x2f: /* stq_c */
364 is_write = 1;
365 }
366
a78b1299 367 return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask);
42a623c7
BS
368}
369#elif defined(__sparc__)
370
371int cpu_signal_handler(int host_signum, void *pinfo,
372 void *puc)
373{
374 siginfo_t *info = pinfo;
375 int is_write;
376 uint32_t insn;
377#if !defined(__arch64__) || defined(CONFIG_SOLARIS)
378 uint32_t *regs = (uint32_t *)(info + 1);
379 void *sigmask = (regs + 20);
380 /* XXX: is there a standard glibc define ? */
381 unsigned long pc = regs[1];
382#else
383#ifdef __linux__
384 struct sigcontext *sc = puc;
385 unsigned long pc = sc->sigc_regs.tpc;
386 void *sigmask = (void *)sc->sigc_mask;
387#elif defined(__OpenBSD__)
388 struct sigcontext *uc = puc;
389 unsigned long pc = uc->sc_pc;
390 void *sigmask = (void *)(long)uc->sc_mask;
7ccfb495
TN
391#elif defined(__NetBSD__)
392 ucontext_t *uc = puc;
393 unsigned long pc = _UC_MACHINE_PC(uc);
394 void *sigmask = (void *)&uc->uc_sigmask;
42a623c7
BS
395#endif
396#endif
397
398 /* XXX: need kernel patch to get write flag faster */
399 is_write = 0;
400 insn = *(uint32_t *)pc;
401 if ((insn >> 30) == 3) {
402 switch ((insn >> 19) & 0x3f) {
403 case 0x05: /* stb */
404 case 0x15: /* stba */
405 case 0x06: /* sth */
406 case 0x16: /* stha */
407 case 0x04: /* st */
408 case 0x14: /* sta */
409 case 0x07: /* std */
410 case 0x17: /* stda */
411 case 0x0e: /* stx */
412 case 0x1e: /* stxa */
413 case 0x24: /* stf */
414 case 0x34: /* stfa */
415 case 0x27: /* stdf */
416 case 0x37: /* stdfa */
417 case 0x26: /* stqf */
418 case 0x36: /* stqfa */
419 case 0x25: /* stfsr */
420 case 0x3c: /* casa */
421 case 0x3e: /* casxa */
422 is_write = 1;
423 break;
424 }
425 }
a78b1299 426 return handle_cpu_signal(pc, info, is_write, sigmask);
42a623c7
BS
427}
428
429#elif defined(__arm__)
430
7ccfb495
TN
431#if defined(__NetBSD__)
432#include <ucontext.h>
433#endif
434
42a623c7
BS
435int cpu_signal_handler(int host_signum, void *pinfo,
436 void *puc)
437{
438 siginfo_t *info = pinfo;
7ccfb495
TN
439#if defined(__NetBSD__)
440 ucontext_t *uc = puc;
441#else
04b33e21 442 ucontext_t *uc = puc;
7ccfb495 443#endif
42a623c7
BS
444 unsigned long pc;
445 int is_write;
446
7ccfb495
TN
447#if defined(__NetBSD__)
448 pc = uc->uc_mcontext.__gregs[_REG_R15];
449#elif defined(__GLIBC__) && (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 3))
42a623c7
BS
450 pc = uc->uc_mcontext.gregs[R15];
451#else
452 pc = uc->uc_mcontext.arm_pc;
453#endif
023b0ae3
PM
454
455 /* error_code is the FSR value, in which bit 11 is WnR (assuming a v6 or
456 * later processor; on v5 we will always report this as a read).
457 */
458 is_write = extract32(uc->uc_mcontext.error_code, 11, 1);
a78b1299 459 return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask);
42a623c7
BS
460}
461
f129061c
CF
462#elif defined(__aarch64__)
463
f454a54f
PM
464#ifndef ESR_MAGIC
465/* Pre-3.16 kernel headers don't have these, so provide fallback definitions */
466#define ESR_MAGIC 0x45535201
467struct esr_context {
468 struct _aarch64_ctx head;
469 uint64_t esr;
470};
471#endif
472
473static inline struct _aarch64_ctx *first_ctx(ucontext_t *uc)
474{
475 return (struct _aarch64_ctx *)&uc->uc_mcontext.__reserved;
476}
477
478static inline struct _aarch64_ctx *next_ctx(struct _aarch64_ctx *hdr)
479{
480 return (struct _aarch64_ctx *)((char *)hdr + hdr->size);
481}
482
661f7fa4 483int cpu_signal_handler(int host_signum, void *pinfo, void *puc)
f129061c
CF
484{
485 siginfo_t *info = pinfo;
04b33e21 486 ucontext_t *uc = puc;
661f7fa4 487 uintptr_t pc = uc->uc_mcontext.pc;
661f7fa4 488 bool is_write;
f454a54f
PM
489 struct _aarch64_ctx *hdr;
490 struct esr_context const *esrctx = NULL;
661f7fa4 491
f454a54f
PM
492 /* Find the esr_context, which has the WnR bit in it */
493 for (hdr = first_ctx(uc); hdr->magic; hdr = next_ctx(hdr)) {
494 if (hdr->magic == ESR_MAGIC) {
495 esrctx = (struct esr_context const *)hdr;
496 break;
497 }
498 }
661f7fa4 499
f454a54f
PM
500 if (esrctx) {
501 /* For data aborts ESR.EC is 0b10010x: then bit 6 is the WnR bit */
502 uint64_t esr = esrctx->esr;
503 is_write = extract32(esr, 27, 5) == 0x12 && extract32(esr, 6, 1) == 1;
504 } else {
505 /*
506 * Fall back to parsing instructions; will only be needed
507 * for really ancient (pre-3.16) kernels.
508 */
509 uint32_t insn = *(uint32_t *)pc;
510
511 is_write = ((insn & 0xbfff0000) == 0x0c000000 /* C3.3.1 */
512 || (insn & 0xbfe00000) == 0x0c800000 /* C3.3.2 */
513 || (insn & 0xbfdf0000) == 0x0d000000 /* C3.3.3 */
514 || (insn & 0xbfc00000) == 0x0d800000 /* C3.3.4 */
515 || (insn & 0x3f400000) == 0x08000000 /* C3.3.6 */
516 || (insn & 0x3bc00000) == 0x39000000 /* C3.3.13 */
517 || (insn & 0x3fc00000) == 0x3d800000 /* ... 128bit */
518 /* Ignore bits 10, 11 & 21, controlling indexing. */
519 || (insn & 0x3bc00000) == 0x38000000 /* C3.3.8-12 */
520 || (insn & 0x3fe00000) == 0x3c800000 /* ... 128bit */
521 /* Ignore bits 23 & 24, controlling indexing. */
522 || (insn & 0x3a400000) == 0x28000000); /* C3.3.7,14-16 */
523 }
a78b1299 524 return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask);
f129061c
CF
525}
526
42a623c7
BS
527#elif defined(__s390__)
528
529int cpu_signal_handler(int host_signum, void *pinfo,
530 void *puc)
531{
532 siginfo_t *info = pinfo;
04b33e21 533 ucontext_t *uc = puc;
42a623c7
BS
534 unsigned long pc;
535 uint16_t *pinsn;
536 int is_write = 0;
537
538 pc = uc->uc_mcontext.psw.addr;
539
540 /* ??? On linux, the non-rt signal handler has 4 (!) arguments instead
541 of the normal 2 arguments. The 3rd argument contains the "int_code"
542 from the hardware which does in fact contain the is_write value.
543 The rt signal handler, as far as I can tell, does not give this value
544 at all. Not that we could get to it from here even if it were. */
545 /* ??? This is not even close to complete, since it ignores all
546 of the read-modify-write instructions. */
547 pinsn = (uint16_t *)pc;
548 switch (pinsn[0] >> 8) {
549 case 0x50: /* ST */
550 case 0x42: /* STC */
551 case 0x40: /* STH */
552 is_write = 1;
553 break;
554 case 0xc4: /* RIL format insns */
555 switch (pinsn[0] & 0xf) {
556 case 0xf: /* STRL */
557 case 0xb: /* STGRL */
558 case 0x7: /* STHRL */
559 is_write = 1;
560 }
561 break;
562 case 0xe3: /* RXY format insns */
563 switch (pinsn[2] & 0xff) {
564 case 0x50: /* STY */
565 case 0x24: /* STG */
566 case 0x72: /* STCY */
567 case 0x70: /* STHY */
568 case 0x8e: /* STPQ */
569 case 0x3f: /* STRVH */
570 case 0x3e: /* STRV */
571 case 0x2f: /* STRVG */
572 is_write = 1;
573 }
574 break;
575 }
a78b1299 576 return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask);
42a623c7
BS
577}
578
579#elif defined(__mips__)
580
581int cpu_signal_handler(int host_signum, void *pinfo,
582 void *puc)
583{
584 siginfo_t *info = pinfo;
04b33e21 585 ucontext_t *uc = puc;
42a623c7
BS
586 greg_t pc = uc->uc_mcontext.pc;
587 int is_write;
588
589 /* XXX: compute is_write */
590 is_write = 0;
a78b1299 591 return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask);
42a623c7
BS
592}
593
464e447a
AF
594#elif defined(__riscv)
595
596int cpu_signal_handler(int host_signum, void *pinfo,
597 void *puc)
598{
599 siginfo_t *info = pinfo;
600 ucontext_t *uc = puc;
601 greg_t pc = uc->uc_mcontext.__gregs[REG_PC];
602 uint32_t insn = *(uint32_t *)pc;
603 int is_write = 0;
604
605 /* Detect store by reading the instruction at the program
606 counter. Note: we currently only generate 32-bit
607 instructions so we thus only detect 32-bit stores */
608 switch (((insn >> 0) & 0b11)) {
609 case 3:
610 switch (((insn >> 2) & 0b11111)) {
611 case 8:
612 switch (((insn >> 12) & 0b111)) {
613 case 0: /* sb */
614 case 1: /* sh */
615 case 2: /* sw */
616 case 3: /* sd */
617 case 4: /* sq */
618 is_write = 1;
619 break;
620 default:
621 break;
622 }
623 break;
624 case 9:
625 switch (((insn >> 12) & 0b111)) {
626 case 2: /* fsw */
627 case 3: /* fsd */
628 case 4: /* fsq */
629 is_write = 1;
630 break;
631 default:
632 break;
633 }
634 break;
635 default:
636 break;
637 }
638 }
639
640 /* Check for compressed instructions */
641 switch (((insn >> 13) & 0b111)) {
642 case 7:
643 switch (insn & 0b11) {
644 case 0: /*c.sd */
645 case 2: /* c.sdsp */
646 is_write = 1;
647 break;
648 default:
649 break;
650 }
651 break;
652 case 6:
653 switch (insn & 0b11) {
654 case 0: /* c.sw */
655 case 3: /* c.swsp */
656 is_write = 1;
657 break;
658 default:
659 break;
660 }
661 break;
662 default:
663 break;
664 }
665
666 return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask);
667}
668
42a623c7
BS
669#else
670
671#error host CPU specific signal handler needed
672
673#endif
a411d296
PMD
674
675/* The softmmu versions of these helpers are in cputlb.c. */
676
677/* Do not allow unaligned operations to proceed. Return the host address. */
678static void *atomic_mmu_lookup(CPUArchState *env, target_ulong addr,
679 int size, uintptr_t retaddr)
680{
681 /* Enforce qemu required alignment. */
682 if (unlikely(addr & (size - 1))) {
29a0af61 683 cpu_loop_exit_atomic(env_cpu(env), retaddr);
a411d296 684 }
08b97f7f
RH
685 void *ret = g2h(addr);
686 set_helper_retaddr(retaddr);
687 return ret;
a411d296
PMD
688}
689
690/* Macro to call the above, with local variables from the use context. */
34d49937 691#define ATOMIC_MMU_DECLS do {} while (0)
a411d296 692#define ATOMIC_MMU_LOOKUP atomic_mmu_lookup(env, addr, DATA_SIZE, GETPC())
08b97f7f 693#define ATOMIC_MMU_CLEANUP do { clear_helper_retaddr(); } while (0)
a411d296
PMD
694
695#define ATOMIC_NAME(X) HELPER(glue(glue(atomic_ ## X, SUFFIX), END))
696#define EXTRA_ARGS
697
698#define DATA_SIZE 1
699#include "atomic_template.h"
700
701#define DATA_SIZE 2
702#include "atomic_template.h"
703
704#define DATA_SIZE 4
705#include "atomic_template.h"
706
707#ifdef CONFIG_ATOMIC64
708#define DATA_SIZE 8
709#include "atomic_template.h"
710#endif
711
712/* The following is only callable from other helpers, and matches up
713 with the softmmu version. */
714
e6cd4bb5 715#if HAVE_ATOMIC128 || HAVE_CMPXCHG128
a411d296
PMD
716
717#undef EXTRA_ARGS
718#undef ATOMIC_NAME
719#undef ATOMIC_MMU_LOOKUP
720
721#define EXTRA_ARGS , TCGMemOpIdx oi, uintptr_t retaddr
722#define ATOMIC_NAME(X) \
723 HELPER(glue(glue(glue(atomic_ ## X, SUFFIX), END), _mmu))
724#define ATOMIC_MMU_LOOKUP atomic_mmu_lookup(env, addr, DATA_SIZE, retaddr)
725
726#define DATA_SIZE 16
727#include "atomic_template.h"
e6cd4bb5 728#endif