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Commit | Line | Data |
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befb7447 LV |
1 | /* |
2 | * Emulation of Linux signals | |
3 | * | |
4 | * Copyright (c) 2003 Fabrice Bellard | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program 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 | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
5f764597 LV |
19 | #include "qemu/osdep.h" |
20 | #include "qemu.h" | |
5f764597 LV |
21 | #include "signal-common.h" |
22 | #include "linux-user/trace.h" | |
23 | ||
24 | struct target_sigcontext { | |
25 | abi_ulong trap_no; | |
26 | abi_ulong error_code; | |
27 | abi_ulong oldmask; | |
28 | abi_ulong arm_r0; | |
29 | abi_ulong arm_r1; | |
30 | abi_ulong arm_r2; | |
31 | abi_ulong arm_r3; | |
32 | abi_ulong arm_r4; | |
33 | abi_ulong arm_r5; | |
34 | abi_ulong arm_r6; | |
35 | abi_ulong arm_r7; | |
36 | abi_ulong arm_r8; | |
37 | abi_ulong arm_r9; | |
38 | abi_ulong arm_r10; | |
39 | abi_ulong arm_fp; | |
40 | abi_ulong arm_ip; | |
41 | abi_ulong arm_sp; | |
42 | abi_ulong arm_lr; | |
43 | abi_ulong arm_pc; | |
44 | abi_ulong arm_cpsr; | |
45 | abi_ulong fault_address; | |
46 | }; | |
47 | ||
48 | struct target_ucontext_v1 { | |
49 | abi_ulong tuc_flags; | |
50 | abi_ulong tuc_link; | |
51 | target_stack_t tuc_stack; | |
52 | struct target_sigcontext tuc_mcontext; | |
53 | target_sigset_t tuc_sigmask; /* mask last for extensibility */ | |
54 | }; | |
55 | ||
56 | struct target_ucontext_v2 { | |
57 | abi_ulong tuc_flags; | |
58 | abi_ulong tuc_link; | |
59 | target_stack_t tuc_stack; | |
60 | struct target_sigcontext tuc_mcontext; | |
61 | target_sigset_t tuc_sigmask; /* mask last for extensibility */ | |
62 | char __unused[128 - sizeof(target_sigset_t)]; | |
63 | abi_ulong tuc_regspace[128] __attribute__((__aligned__(8))); | |
64 | }; | |
65 | ||
66 | struct target_user_vfp { | |
67 | uint64_t fpregs[32]; | |
68 | abi_ulong fpscr; | |
69 | }; | |
70 | ||
71 | struct target_user_vfp_exc { | |
72 | abi_ulong fpexc; | |
73 | abi_ulong fpinst; | |
74 | abi_ulong fpinst2; | |
75 | }; | |
76 | ||
77 | struct target_vfp_sigframe { | |
78 | abi_ulong magic; | |
79 | abi_ulong size; | |
80 | struct target_user_vfp ufp; | |
81 | struct target_user_vfp_exc ufp_exc; | |
82 | } __attribute__((__aligned__(8))); | |
83 | ||
84 | struct target_iwmmxt_sigframe { | |
85 | abi_ulong magic; | |
86 | abi_ulong size; | |
87 | uint64_t regs[16]; | |
88 | /* Note that not all the coprocessor control registers are stored here */ | |
89 | uint32_t wcssf; | |
90 | uint32_t wcasf; | |
91 | uint32_t wcgr0; | |
92 | uint32_t wcgr1; | |
93 | uint32_t wcgr2; | |
94 | uint32_t wcgr3; | |
95 | } __attribute__((__aligned__(8))); | |
96 | ||
97 | #define TARGET_VFP_MAGIC 0x56465001 | |
98 | #define TARGET_IWMMXT_MAGIC 0x12ef842a | |
99 | ||
100 | struct sigframe_v1 | |
101 | { | |
102 | struct target_sigcontext sc; | |
103 | abi_ulong extramask[TARGET_NSIG_WORDS-1]; | |
e8fa7295 | 104 | abi_ulong retcode[4]; |
5f764597 LV |
105 | }; |
106 | ||
107 | struct sigframe_v2 | |
108 | { | |
109 | struct target_ucontext_v2 uc; | |
e8fa7295 | 110 | abi_ulong retcode[4]; |
5f764597 LV |
111 | }; |
112 | ||
113 | struct rt_sigframe_v1 | |
114 | { | |
115 | abi_ulong pinfo; | |
116 | abi_ulong puc; | |
117 | struct target_siginfo info; | |
118 | struct target_ucontext_v1 uc; | |
e8fa7295 | 119 | abi_ulong retcode[4]; |
5f764597 LV |
120 | }; |
121 | ||
122 | struct rt_sigframe_v2 | |
123 | { | |
124 | struct target_siginfo info; | |
125 | struct target_ucontext_v2 uc; | |
e8fa7295 | 126 | abi_ulong retcode[4]; |
5f764597 LV |
127 | }; |
128 | ||
5f764597 LV |
129 | /* |
130 | * For ARM syscalls, we encode the syscall number into the instruction. | |
131 | */ | |
132 | #define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE)) | |
133 | #define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE)) | |
134 | ||
135 | /* | |
136 | * For Thumb syscalls, we pass the syscall number via r7. We therefore | |
137 | * need two 16-bit instructions. | |
138 | */ | |
139 | #define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn)) | |
140 | #define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn)) | |
141 | ||
142 | static const abi_ulong retcodes[4] = { | |
143 | SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN, | |
144 | SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN | |
145 | }; | |
146 | ||
e8fa7295 CL |
147 | /* |
148 | * Stub needed to make sure the FD register (r9) contains the right | |
149 | * value. | |
150 | */ | |
151 | static const unsigned long sigreturn_fdpic_codes[3] = { | |
152 | 0xe59fc004, /* ldr r12, [pc, #4] to read function descriptor */ | |
153 | 0xe59c9004, /* ldr r9, [r12, #4] to setup GOT */ | |
154 | 0xe59cf000 /* ldr pc, [r12] to jump into restorer */ | |
155 | }; | |
156 | ||
157 | static const unsigned long sigreturn_fdpic_thumb_codes[3] = { | |
158 | 0xc008f8df, /* ldr r12, [pc, #8] to read function descriptor */ | |
159 | 0x9004f8dc, /* ldr r9, [r12, #4] to setup GOT */ | |
160 | 0xf000f8dc /* ldr pc, [r12] to jump into restorer */ | |
161 | }; | |
5f764597 LV |
162 | |
163 | static inline int valid_user_regs(CPUARMState *regs) | |
164 | { | |
165 | return 1; | |
166 | } | |
167 | ||
168 | static void | |
169 | setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ | |
170 | CPUARMState *env, abi_ulong mask) | |
171 | { | |
172 | __put_user(env->regs[0], &sc->arm_r0); | |
173 | __put_user(env->regs[1], &sc->arm_r1); | |
174 | __put_user(env->regs[2], &sc->arm_r2); | |
175 | __put_user(env->regs[3], &sc->arm_r3); | |
176 | __put_user(env->regs[4], &sc->arm_r4); | |
177 | __put_user(env->regs[5], &sc->arm_r5); | |
178 | __put_user(env->regs[6], &sc->arm_r6); | |
179 | __put_user(env->regs[7], &sc->arm_r7); | |
180 | __put_user(env->regs[8], &sc->arm_r8); | |
181 | __put_user(env->regs[9], &sc->arm_r9); | |
182 | __put_user(env->regs[10], &sc->arm_r10); | |
183 | __put_user(env->regs[11], &sc->arm_fp); | |
184 | __put_user(env->regs[12], &sc->arm_ip); | |
185 | __put_user(env->regs[13], &sc->arm_sp); | |
186 | __put_user(env->regs[14], &sc->arm_lr); | |
187 | __put_user(env->regs[15], &sc->arm_pc); | |
5f764597 | 188 | __put_user(cpsr_read(env), &sc->arm_cpsr); |
5f764597 LV |
189 | |
190 | __put_user(/* current->thread.trap_no */ 0, &sc->trap_no); | |
191 | __put_user(/* current->thread.error_code */ 0, &sc->error_code); | |
192 | __put_user(/* current->thread.address */ 0, &sc->fault_address); | |
193 | __put_user(mask, &sc->oldmask); | |
194 | } | |
195 | ||
196 | static inline abi_ulong | |
197 | get_sigframe(struct target_sigaction *ka, CPUARMState *regs, int framesize) | |
198 | { | |
465e237b | 199 | unsigned long sp; |
5f764597 | 200 | |
465e237b | 201 | sp = target_sigsp(get_sp_from_cpustate(regs), ka); |
5f764597 LV |
202 | /* |
203 | * ATPCS B01 mandates 8-byte alignment | |
204 | */ | |
205 | return (sp - framesize) & ~7; | |
206 | } | |
207 | ||
e8fa7295 | 208 | static int |
5f764597 LV |
209 | setup_return(CPUARMState *env, struct target_sigaction *ka, |
210 | abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr) | |
211 | { | |
e8fa7295 CL |
212 | abi_ulong handler = 0; |
213 | abi_ulong handler_fdpic_GOT = 0; | |
5f764597 | 214 | abi_ulong retcode; |
e8fa7295 CL |
215 | |
216 | int thumb; | |
217 | int is_fdpic = info_is_fdpic(((TaskState *)thread_cpu->opaque)->info); | |
218 | ||
219 | if (is_fdpic) { | |
220 | /* In FDPIC mode, ka->_sa_handler points to a function | |
221 | * descriptor (FD). The first word contains the address of the | |
222 | * handler. The second word contains the value of the PIC | |
223 | * register (r9). */ | |
224 | abi_ulong funcdesc_ptr = ka->_sa_handler; | |
225 | if (get_user_ual(handler, funcdesc_ptr) | |
226 | || get_user_ual(handler_fdpic_GOT, funcdesc_ptr + 4)) { | |
227 | return 1; | |
228 | } | |
229 | } else { | |
230 | handler = ka->_sa_handler; | |
231 | } | |
232 | ||
233 | thumb = handler & 1; | |
234 | ||
5f764597 LV |
235 | uint32_t cpsr = cpsr_read(env); |
236 | ||
237 | cpsr &= ~CPSR_IT; | |
238 | if (thumb) { | |
239 | cpsr |= CPSR_T; | |
240 | } else { | |
241 | cpsr &= ~CPSR_T; | |
242 | } | |
45e28139 AA |
243 | if (env->cp15.sctlr_el[1] & SCTLR_E0E) { |
244 | cpsr |= CPSR_E; | |
245 | } else { | |
246 | cpsr &= ~CPSR_E; | |
247 | } | |
5f764597 LV |
248 | |
249 | if (ka->sa_flags & TARGET_SA_RESTORER) { | |
e8fa7295 CL |
250 | if (is_fdpic) { |
251 | /* For FDPIC we ensure that the restorer is called with a | |
252 | * correct r9 value. For that we need to write code on | |
253 | * the stack that sets r9 and jumps back to restorer | |
254 | * value. | |
255 | */ | |
256 | if (thumb) { | |
257 | __put_user(sigreturn_fdpic_thumb_codes[0], rc); | |
258 | __put_user(sigreturn_fdpic_thumb_codes[1], rc + 1); | |
259 | __put_user(sigreturn_fdpic_thumb_codes[2], rc + 2); | |
260 | __put_user((abi_ulong)ka->sa_restorer, rc + 3); | |
261 | } else { | |
262 | __put_user(sigreturn_fdpic_codes[0], rc); | |
263 | __put_user(sigreturn_fdpic_codes[1], rc + 1); | |
264 | __put_user(sigreturn_fdpic_codes[2], rc + 2); | |
265 | __put_user((abi_ulong)ka->sa_restorer, rc + 3); | |
266 | } | |
267 | ||
268 | retcode = rc_addr + thumb; | |
269 | } else { | |
270 | retcode = ka->sa_restorer; | |
271 | } | |
5f764597 LV |
272 | } else { |
273 | unsigned int idx = thumb; | |
274 | ||
275 | if (ka->sa_flags & TARGET_SA_SIGINFO) { | |
276 | idx += 2; | |
277 | } | |
278 | ||
279 | __put_user(retcodes[idx], rc); | |
280 | ||
281 | retcode = rc_addr + thumb; | |
282 | } | |
283 | ||
284 | env->regs[0] = usig; | |
e8fa7295 CL |
285 | if (is_fdpic) { |
286 | env->regs[9] = handler_fdpic_GOT; | |
287 | } | |
5f764597 LV |
288 | env->regs[13] = frame_addr; |
289 | env->regs[14] = retcode; | |
290 | env->regs[15] = handler & (thumb ? ~1 : ~3); | |
45e28139 AA |
291 | cpsr_write(env, cpsr, CPSR_IT | CPSR_T | CPSR_E, CPSRWriteByInstr); |
292 | arm_rebuild_hflags(env); | |
e8fa7295 CL |
293 | |
294 | return 0; | |
5f764597 LV |
295 | } |
296 | ||
297 | static abi_ulong *setup_sigframe_v2_vfp(abi_ulong *regspace, CPUARMState *env) | |
298 | { | |
299 | int i; | |
300 | struct target_vfp_sigframe *vfpframe; | |
301 | vfpframe = (struct target_vfp_sigframe *)regspace; | |
302 | __put_user(TARGET_VFP_MAGIC, &vfpframe->magic); | |
303 | __put_user(sizeof(*vfpframe), &vfpframe->size); | |
304 | for (i = 0; i < 32; i++) { | |
305 | __put_user(*aa32_vfp_dreg(env, i), &vfpframe->ufp.fpregs[i]); | |
306 | } | |
307 | __put_user(vfp_get_fpscr(env), &vfpframe->ufp.fpscr); | |
308 | __put_user(env->vfp.xregs[ARM_VFP_FPEXC], &vfpframe->ufp_exc.fpexc); | |
309 | __put_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst); | |
310 | __put_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2); | |
311 | return (abi_ulong*)(vfpframe+1); | |
312 | } | |
313 | ||
314 | static abi_ulong *setup_sigframe_v2_iwmmxt(abi_ulong *regspace, | |
315 | CPUARMState *env) | |
316 | { | |
317 | int i; | |
318 | struct target_iwmmxt_sigframe *iwmmxtframe; | |
319 | iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace; | |
320 | __put_user(TARGET_IWMMXT_MAGIC, &iwmmxtframe->magic); | |
321 | __put_user(sizeof(*iwmmxtframe), &iwmmxtframe->size); | |
322 | for (i = 0; i < 16; i++) { | |
323 | __put_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]); | |
324 | } | |
325 | __put_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf); | |
326 | __put_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf); | |
327 | __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0); | |
328 | __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1); | |
329 | __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2); | |
330 | __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3); | |
331 | return (abi_ulong*)(iwmmxtframe+1); | |
332 | } | |
333 | ||
334 | static void setup_sigframe_v2(struct target_ucontext_v2 *uc, | |
335 | target_sigset_t *set, CPUARMState *env) | |
336 | { | |
337 | struct target_sigaltstack stack; | |
338 | int i; | |
339 | abi_ulong *regspace; | |
340 | ||
341 | /* Clear all the bits of the ucontext we don't use. */ | |
342 | memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext)); | |
343 | ||
344 | memset(&stack, 0, sizeof(stack)); | |
465e237b | 345 | target_save_altstack(&stack, env); |
5f764597 LV |
346 | memcpy(&uc->tuc_stack, &stack, sizeof(stack)); |
347 | ||
348 | setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]); | |
349 | /* Save coprocessor signal frame. */ | |
350 | regspace = uc->tuc_regspace; | |
7fbc6a40 | 351 | if (cpu_isar_feature(aa32_vfp_simd, env_archcpu(env))) { |
5f764597 LV |
352 | regspace = setup_sigframe_v2_vfp(regspace, env); |
353 | } | |
354 | if (arm_feature(env, ARM_FEATURE_IWMMXT)) { | |
355 | regspace = setup_sigframe_v2_iwmmxt(regspace, env); | |
356 | } | |
357 | ||
358 | /* Write terminating magic word */ | |
359 | __put_user(0, regspace); | |
360 | ||
361 | for(i = 0; i < TARGET_NSIG_WORDS; i++) { | |
362 | __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]); | |
363 | } | |
364 | } | |
365 | ||
366 | /* compare linux/arch/arm/kernel/signal.c:setup_frame() */ | |
367 | static void setup_frame_v1(int usig, struct target_sigaction *ka, | |
368 | target_sigset_t *set, CPUARMState *regs) | |
369 | { | |
370 | struct sigframe_v1 *frame; | |
371 | abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame)); | |
372 | int i; | |
373 | ||
374 | trace_user_setup_frame(regs, frame_addr); | |
375 | if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { | |
376 | goto sigsegv; | |
377 | } | |
378 | ||
379 | setup_sigcontext(&frame->sc, regs, set->sig[0]); | |
380 | ||
381 | for(i = 1; i < TARGET_NSIG_WORDS; i++) { | |
382 | __put_user(set->sig[i], &frame->extramask[i - 1]); | |
383 | } | |
384 | ||
e8fa7295 CL |
385 | if (setup_return(regs, ka, frame->retcode, frame_addr, usig, |
386 | frame_addr + offsetof(struct sigframe_v1, retcode))) { | |
387 | goto sigsegv; | |
388 | } | |
5f764597 LV |
389 | |
390 | unlock_user_struct(frame, frame_addr, 1); | |
391 | return; | |
392 | sigsegv: | |
e8fa7295 | 393 | unlock_user_struct(frame, frame_addr, 1); |
5f764597 LV |
394 | force_sigsegv(usig); |
395 | } | |
396 | ||
397 | static void setup_frame_v2(int usig, struct target_sigaction *ka, | |
398 | target_sigset_t *set, CPUARMState *regs) | |
399 | { | |
400 | struct sigframe_v2 *frame; | |
401 | abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame)); | |
402 | ||
403 | trace_user_setup_frame(regs, frame_addr); | |
404 | if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { | |
405 | goto sigsegv; | |
406 | } | |
407 | ||
408 | setup_sigframe_v2(&frame->uc, set, regs); | |
409 | ||
e8fa7295 CL |
410 | if (setup_return(regs, ka, frame->retcode, frame_addr, usig, |
411 | frame_addr + offsetof(struct sigframe_v2, retcode))) { | |
412 | goto sigsegv; | |
413 | } | |
5f764597 LV |
414 | |
415 | unlock_user_struct(frame, frame_addr, 1); | |
416 | return; | |
417 | sigsegv: | |
e8fa7295 | 418 | unlock_user_struct(frame, frame_addr, 1); |
5f764597 LV |
419 | force_sigsegv(usig); |
420 | } | |
421 | ||
422 | void setup_frame(int usig, struct target_sigaction *ka, | |
423 | target_sigset_t *set, CPUARMState *regs) | |
424 | { | |
425 | if (get_osversion() >= 0x020612) { | |
426 | setup_frame_v2(usig, ka, set, regs); | |
427 | } else { | |
428 | setup_frame_v1(usig, ka, set, regs); | |
429 | } | |
430 | } | |
431 | ||
432 | /* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */ | |
433 | static void setup_rt_frame_v1(int usig, struct target_sigaction *ka, | |
434 | target_siginfo_t *info, | |
435 | target_sigset_t *set, CPUARMState *env) | |
436 | { | |
437 | struct rt_sigframe_v1 *frame; | |
438 | abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame)); | |
439 | struct target_sigaltstack stack; | |
440 | int i; | |
441 | abi_ulong info_addr, uc_addr; | |
442 | ||
443 | trace_user_setup_rt_frame(env, frame_addr); | |
444 | if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { | |
445 | goto sigsegv; | |
446 | } | |
447 | ||
448 | info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info); | |
449 | __put_user(info_addr, &frame->pinfo); | |
450 | uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc); | |
451 | __put_user(uc_addr, &frame->puc); | |
452 | tswap_siginfo(&frame->info, info); | |
453 | ||
454 | /* Clear all the bits of the ucontext we don't use. */ | |
455 | memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext)); | |
456 | ||
457 | memset(&stack, 0, sizeof(stack)); | |
465e237b | 458 | target_save_altstack(&stack, env); |
5f764597 LV |
459 | memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack)); |
460 | ||
461 | setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]); | |
462 | for(i = 0; i < TARGET_NSIG_WORDS; i++) { | |
463 | __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); | |
464 | } | |
465 | ||
e8fa7295 CL |
466 | if (setup_return(env, ka, frame->retcode, frame_addr, usig, |
467 | frame_addr + offsetof(struct rt_sigframe_v1, retcode))) { | |
468 | goto sigsegv; | |
469 | } | |
5f764597 LV |
470 | |
471 | env->regs[1] = info_addr; | |
472 | env->regs[2] = uc_addr; | |
473 | ||
474 | unlock_user_struct(frame, frame_addr, 1); | |
475 | return; | |
476 | sigsegv: | |
e8fa7295 | 477 | unlock_user_struct(frame, frame_addr, 1); |
5f764597 LV |
478 | force_sigsegv(usig); |
479 | } | |
480 | ||
481 | static void setup_rt_frame_v2(int usig, struct target_sigaction *ka, | |
482 | target_siginfo_t *info, | |
483 | target_sigset_t *set, CPUARMState *env) | |
484 | { | |
485 | struct rt_sigframe_v2 *frame; | |
486 | abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame)); | |
487 | abi_ulong info_addr, uc_addr; | |
488 | ||
489 | trace_user_setup_rt_frame(env, frame_addr); | |
490 | if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { | |
491 | goto sigsegv; | |
492 | } | |
493 | ||
494 | info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info); | |
495 | uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc); | |
496 | tswap_siginfo(&frame->info, info); | |
497 | ||
498 | setup_sigframe_v2(&frame->uc, set, env); | |
499 | ||
e8fa7295 CL |
500 | if (setup_return(env, ka, frame->retcode, frame_addr, usig, |
501 | frame_addr + offsetof(struct rt_sigframe_v2, retcode))) { | |
502 | goto sigsegv; | |
503 | } | |
5f764597 LV |
504 | |
505 | env->regs[1] = info_addr; | |
506 | env->regs[2] = uc_addr; | |
507 | ||
508 | unlock_user_struct(frame, frame_addr, 1); | |
509 | return; | |
510 | sigsegv: | |
e8fa7295 | 511 | unlock_user_struct(frame, frame_addr, 1); |
5f764597 LV |
512 | force_sigsegv(usig); |
513 | } | |
514 | ||
515 | void setup_rt_frame(int usig, struct target_sigaction *ka, | |
516 | target_siginfo_t *info, | |
517 | target_sigset_t *set, CPUARMState *env) | |
518 | { | |
519 | if (get_osversion() >= 0x020612) { | |
520 | setup_rt_frame_v2(usig, ka, info, set, env); | |
521 | } else { | |
522 | setup_rt_frame_v1(usig, ka, info, set, env); | |
523 | } | |
524 | } | |
525 | ||
526 | static int | |
527 | restore_sigcontext(CPUARMState *env, struct target_sigcontext *sc) | |
528 | { | |
529 | int err = 0; | |
530 | uint32_t cpsr; | |
531 | ||
532 | __get_user(env->regs[0], &sc->arm_r0); | |
533 | __get_user(env->regs[1], &sc->arm_r1); | |
534 | __get_user(env->regs[2], &sc->arm_r2); | |
535 | __get_user(env->regs[3], &sc->arm_r3); | |
536 | __get_user(env->regs[4], &sc->arm_r4); | |
537 | __get_user(env->regs[5], &sc->arm_r5); | |
538 | __get_user(env->regs[6], &sc->arm_r6); | |
539 | __get_user(env->regs[7], &sc->arm_r7); | |
540 | __get_user(env->regs[8], &sc->arm_r8); | |
541 | __get_user(env->regs[9], &sc->arm_r9); | |
542 | __get_user(env->regs[10], &sc->arm_r10); | |
543 | __get_user(env->regs[11], &sc->arm_fp); | |
544 | __get_user(env->regs[12], &sc->arm_ip); | |
545 | __get_user(env->regs[13], &sc->arm_sp); | |
546 | __get_user(env->regs[14], &sc->arm_lr); | |
547 | __get_user(env->regs[15], &sc->arm_pc); | |
5f764597 LV |
548 | __get_user(cpsr, &sc->arm_cpsr); |
549 | cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC, CPSRWriteByInstr); | |
268b1b3d | 550 | arm_rebuild_hflags(env); |
5f764597 LV |
551 | |
552 | err |= !valid_user_regs(env); | |
553 | ||
554 | return err; | |
555 | } | |
556 | ||
557 | static long do_sigreturn_v1(CPUARMState *env) | |
558 | { | |
559 | abi_ulong frame_addr; | |
560 | struct sigframe_v1 *frame = NULL; | |
561 | target_sigset_t set; | |
562 | sigset_t host_set; | |
563 | int i; | |
564 | ||
565 | /* | |
566 | * Since we stacked the signal on a 64-bit boundary, | |
567 | * then 'sp' should be word aligned here. If it's | |
568 | * not, then the user is trying to mess with us. | |
569 | */ | |
570 | frame_addr = env->regs[13]; | |
571 | trace_user_do_sigreturn(env, frame_addr); | |
572 | if (frame_addr & 7) { | |
573 | goto badframe; | |
574 | } | |
575 | ||
576 | if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { | |
577 | goto badframe; | |
578 | } | |
579 | ||
580 | __get_user(set.sig[0], &frame->sc.oldmask); | |
581 | for(i = 1; i < TARGET_NSIG_WORDS; i++) { | |
582 | __get_user(set.sig[i], &frame->extramask[i - 1]); | |
583 | } | |
584 | ||
585 | target_to_host_sigset_internal(&host_set, &set); | |
586 | set_sigmask(&host_set); | |
587 | ||
588 | if (restore_sigcontext(env, &frame->sc)) { | |
589 | goto badframe; | |
590 | } | |
591 | ||
592 | #if 0 | |
593 | /* Send SIGTRAP if we're single-stepping */ | |
594 | if (ptrace_cancel_bpt(current)) | |
595 | send_sig(SIGTRAP, current, 1); | |
596 | #endif | |
597 | unlock_user_struct(frame, frame_addr, 0); | |
598 | return -TARGET_QEMU_ESIGRETURN; | |
599 | ||
600 | badframe: | |
601 | force_sig(TARGET_SIGSEGV); | |
602 | return -TARGET_QEMU_ESIGRETURN; | |
603 | } | |
604 | ||
605 | static abi_ulong *restore_sigframe_v2_vfp(CPUARMState *env, abi_ulong *regspace) | |
606 | { | |
607 | int i; | |
608 | abi_ulong magic, sz; | |
609 | uint32_t fpscr, fpexc; | |
610 | struct target_vfp_sigframe *vfpframe; | |
611 | vfpframe = (struct target_vfp_sigframe *)regspace; | |
612 | ||
613 | __get_user(magic, &vfpframe->magic); | |
614 | __get_user(sz, &vfpframe->size); | |
615 | if (magic != TARGET_VFP_MAGIC || sz != sizeof(*vfpframe)) { | |
616 | return 0; | |
617 | } | |
618 | for (i = 0; i < 32; i++) { | |
619 | __get_user(*aa32_vfp_dreg(env, i), &vfpframe->ufp.fpregs[i]); | |
620 | } | |
621 | __get_user(fpscr, &vfpframe->ufp.fpscr); | |
622 | vfp_set_fpscr(env, fpscr); | |
623 | __get_user(fpexc, &vfpframe->ufp_exc.fpexc); | |
624 | /* Sanitise FPEXC: ensure VFP is enabled, FPINST2 is invalid | |
625 | * and the exception flag is cleared | |
626 | */ | |
627 | fpexc |= (1 << 30); | |
628 | fpexc &= ~((1 << 31) | (1 << 28)); | |
629 | env->vfp.xregs[ARM_VFP_FPEXC] = fpexc; | |
630 | __get_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst); | |
631 | __get_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2); | |
632 | return (abi_ulong*)(vfpframe + 1); | |
633 | } | |
634 | ||
635 | static abi_ulong *restore_sigframe_v2_iwmmxt(CPUARMState *env, | |
636 | abi_ulong *regspace) | |
637 | { | |
638 | int i; | |
639 | abi_ulong magic, sz; | |
640 | struct target_iwmmxt_sigframe *iwmmxtframe; | |
641 | iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace; | |
642 | ||
643 | __get_user(magic, &iwmmxtframe->magic); | |
644 | __get_user(sz, &iwmmxtframe->size); | |
645 | if (magic != TARGET_IWMMXT_MAGIC || sz != sizeof(*iwmmxtframe)) { | |
646 | return 0; | |
647 | } | |
648 | for (i = 0; i < 16; i++) { | |
649 | __get_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]); | |
650 | } | |
651 | __get_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf); | |
652 | __get_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf); | |
653 | __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0); | |
654 | __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1); | |
655 | __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2); | |
656 | __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3); | |
657 | return (abi_ulong*)(iwmmxtframe + 1); | |
658 | } | |
659 | ||
660 | static int do_sigframe_return_v2(CPUARMState *env, | |
661 | target_ulong context_addr, | |
662 | struct target_ucontext_v2 *uc) | |
663 | { | |
664 | sigset_t host_set; | |
665 | abi_ulong *regspace; | |
666 | ||
667 | target_to_host_sigset(&host_set, &uc->tuc_sigmask); | |
668 | set_sigmask(&host_set); | |
669 | ||
670 | if (restore_sigcontext(env, &uc->tuc_mcontext)) | |
671 | return 1; | |
672 | ||
673 | /* Restore coprocessor signal frame */ | |
674 | regspace = uc->tuc_regspace; | |
7fbc6a40 | 675 | if (cpu_isar_feature(aa32_vfp_simd, env_archcpu(env))) { |
5f764597 LV |
676 | regspace = restore_sigframe_v2_vfp(env, regspace); |
677 | if (!regspace) { | |
678 | return 1; | |
679 | } | |
680 | } | |
681 | if (arm_feature(env, ARM_FEATURE_IWMMXT)) { | |
682 | regspace = restore_sigframe_v2_iwmmxt(env, regspace); | |
683 | if (!regspace) { | |
684 | return 1; | |
685 | } | |
686 | } | |
687 | ||
688 | if (do_sigaltstack(context_addr | |
689 | + offsetof(struct target_ucontext_v2, tuc_stack), | |
690 | 0, get_sp_from_cpustate(env)) == -EFAULT) { | |
691 | return 1; | |
692 | } | |
693 | ||
694 | #if 0 | |
695 | /* Send SIGTRAP if we're single-stepping */ | |
696 | if (ptrace_cancel_bpt(current)) | |
697 | send_sig(SIGTRAP, current, 1); | |
698 | #endif | |
699 | ||
700 | return 0; | |
701 | } | |
702 | ||
703 | static long do_sigreturn_v2(CPUARMState *env) | |
704 | { | |
705 | abi_ulong frame_addr; | |
706 | struct sigframe_v2 *frame = NULL; | |
707 | ||
708 | /* | |
709 | * Since we stacked the signal on a 64-bit boundary, | |
710 | * then 'sp' should be word aligned here. If it's | |
711 | * not, then the user is trying to mess with us. | |
712 | */ | |
713 | frame_addr = env->regs[13]; | |
714 | trace_user_do_sigreturn(env, frame_addr); | |
715 | if (frame_addr & 7) { | |
716 | goto badframe; | |
717 | } | |
718 | ||
719 | if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { | |
720 | goto badframe; | |
721 | } | |
722 | ||
723 | if (do_sigframe_return_v2(env, | |
724 | frame_addr | |
725 | + offsetof(struct sigframe_v2, uc), | |
726 | &frame->uc)) { | |
727 | goto badframe; | |
728 | } | |
729 | ||
730 | unlock_user_struct(frame, frame_addr, 0); | |
731 | return -TARGET_QEMU_ESIGRETURN; | |
732 | ||
733 | badframe: | |
734 | unlock_user_struct(frame, frame_addr, 0); | |
735 | force_sig(TARGET_SIGSEGV); | |
736 | return -TARGET_QEMU_ESIGRETURN; | |
737 | } | |
738 | ||
739 | long do_sigreturn(CPUARMState *env) | |
740 | { | |
741 | if (get_osversion() >= 0x020612) { | |
742 | return do_sigreturn_v2(env); | |
743 | } else { | |
744 | return do_sigreturn_v1(env); | |
745 | } | |
746 | } | |
747 | ||
748 | static long do_rt_sigreturn_v1(CPUARMState *env) | |
749 | { | |
750 | abi_ulong frame_addr; | |
751 | struct rt_sigframe_v1 *frame = NULL; | |
752 | sigset_t host_set; | |
753 | ||
754 | /* | |
755 | * Since we stacked the signal on a 64-bit boundary, | |
756 | * then 'sp' should be word aligned here. If it's | |
757 | * not, then the user is trying to mess with us. | |
758 | */ | |
759 | frame_addr = env->regs[13]; | |
760 | trace_user_do_rt_sigreturn(env, frame_addr); | |
761 | if (frame_addr & 7) { | |
762 | goto badframe; | |
763 | } | |
764 | ||
765 | if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { | |
766 | goto badframe; | |
767 | } | |
768 | ||
769 | target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask); | |
770 | set_sigmask(&host_set); | |
771 | ||
772 | if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) { | |
773 | goto badframe; | |
774 | } | |
775 | ||
776 | if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) | |
777 | goto badframe; | |
778 | ||
779 | #if 0 | |
780 | /* Send SIGTRAP if we're single-stepping */ | |
781 | if (ptrace_cancel_bpt(current)) | |
782 | send_sig(SIGTRAP, current, 1); | |
783 | #endif | |
784 | unlock_user_struct(frame, frame_addr, 0); | |
785 | return -TARGET_QEMU_ESIGRETURN; | |
786 | ||
787 | badframe: | |
788 | unlock_user_struct(frame, frame_addr, 0); | |
789 | force_sig(TARGET_SIGSEGV); | |
790 | return -TARGET_QEMU_ESIGRETURN; | |
791 | } | |
792 | ||
793 | static long do_rt_sigreturn_v2(CPUARMState *env) | |
794 | { | |
795 | abi_ulong frame_addr; | |
796 | struct rt_sigframe_v2 *frame = NULL; | |
797 | ||
798 | /* | |
799 | * Since we stacked the signal on a 64-bit boundary, | |
800 | * then 'sp' should be word aligned here. If it's | |
801 | * not, then the user is trying to mess with us. | |
802 | */ | |
803 | frame_addr = env->regs[13]; | |
804 | trace_user_do_rt_sigreturn(env, frame_addr); | |
805 | if (frame_addr & 7) { | |
806 | goto badframe; | |
807 | } | |
808 | ||
809 | if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { | |
810 | goto badframe; | |
811 | } | |
812 | ||
813 | if (do_sigframe_return_v2(env, | |
814 | frame_addr | |
815 | + offsetof(struct rt_sigframe_v2, uc), | |
816 | &frame->uc)) { | |
817 | goto badframe; | |
818 | } | |
819 | ||
820 | unlock_user_struct(frame, frame_addr, 0); | |
821 | return -TARGET_QEMU_ESIGRETURN; | |
822 | ||
823 | badframe: | |
824 | unlock_user_struct(frame, frame_addr, 0); | |
825 | force_sig(TARGET_SIGSEGV); | |
826 | return -TARGET_QEMU_ESIGRETURN; | |
827 | } | |
828 | ||
829 | long do_rt_sigreturn(CPUARMState *env) | |
830 | { | |
831 | if (get_osversion() >= 0x020612) { | |
832 | return do_rt_sigreturn_v2(env); | |
833 | } else { | |
834 | return do_rt_sigreturn_v1(env); | |
835 | } | |
836 | } |