1befb7447SLaurent Vivier /*
2befb7447SLaurent Vivier * Emulation of Linux signals
3befb7447SLaurent Vivier *
4befb7447SLaurent Vivier * Copyright (c) 2003 Fabrice Bellard
5befb7447SLaurent Vivier *
6befb7447SLaurent Vivier * This program is free software; you can redistribute it and/or modify
7befb7447SLaurent Vivier * it under the terms of the GNU General Public License as published by
8befb7447SLaurent Vivier * the Free Software Foundation; either version 2 of the License, or
9befb7447SLaurent Vivier * (at your option) any later version.
10befb7447SLaurent Vivier *
11befb7447SLaurent Vivier * This program is distributed in the hope that it will be useful,
12befb7447SLaurent Vivier * but WITHOUT ANY WARRANTY; without even the implied warranty of
13befb7447SLaurent Vivier * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14befb7447SLaurent Vivier * GNU General Public License for more details.
15befb7447SLaurent Vivier *
16befb7447SLaurent Vivier * You should have received a copy of the GNU General Public License
17befb7447SLaurent Vivier * along with this program; if not, see <http://www.gnu.org/licenses/>.
18befb7447SLaurent Vivier */
194c4c73e3SLaurent Vivier #include "qemu/osdep.h"
204c4c73e3SLaurent Vivier #include "qemu.h"
213b249d26SPeter Maydell #include "user-internals.h"
224c4c73e3SLaurent Vivier #include "signal-common.h"
234c4c73e3SLaurent Vivier #include "linux-user/trace.h"
24b63c6b97SRichard Henderson #include "vdso-asmoffset.h"
254c4c73e3SLaurent Vivier
264c4c73e3SLaurent Vivier #define __NUM_GPRS 16
274c4c73e3SLaurent Vivier #define __NUM_FPRS 16
284c4c73e3SLaurent Vivier #define __NUM_ACRS 16
294c4c73e3SLaurent Vivier
304c4c73e3SLaurent Vivier #define _SIGCONTEXT_NSIG 64
314c4c73e3SLaurent Vivier #define _SIGCONTEXT_NSIG_BPW 64 /* FIXME: 31-bit mode -> 32 */
324c4c73e3SLaurent Vivier #define _SIGCONTEXT_NSIG_WORDS (_SIGCONTEXT_NSIG / _SIGCONTEXT_NSIG_BPW)
334c4c73e3SLaurent Vivier #define _SIGMASK_COPY_SIZE (sizeof(unsigned long)*_SIGCONTEXT_NSIG_WORDS)
344c4c73e3SLaurent Vivier #define S390_SYSCALL_OPCODE ((uint16_t)0x0a00)
354c4c73e3SLaurent Vivier
364c4c73e3SLaurent Vivier typedef struct {
374c4c73e3SLaurent Vivier target_psw_t psw;
385d79bd11SRichard Henderson abi_ulong gprs[__NUM_GPRS];
395d79bd11SRichard Henderson abi_uint acrs[__NUM_ACRS];
404c4c73e3SLaurent Vivier } target_s390_regs_common;
414c4c73e3SLaurent Vivier
424c4c73e3SLaurent Vivier typedef struct {
435d79bd11SRichard Henderson uint32_t fpc;
445d79bd11SRichard Henderson uint32_t pad;
455d79bd11SRichard Henderson uint64_t fprs[__NUM_FPRS];
464c4c73e3SLaurent Vivier } target_s390_fp_regs;
474c4c73e3SLaurent Vivier
484c4c73e3SLaurent Vivier typedef struct {
494c4c73e3SLaurent Vivier target_s390_regs_common regs;
504c4c73e3SLaurent Vivier target_s390_fp_regs fpregs;
514c4c73e3SLaurent Vivier } target_sigregs;
524c4c73e3SLaurent Vivier
535d79bd11SRichard Henderson typedef struct {
540b16f04cSRichard Henderson uint64_t vxrs_low[16];
550b16f04cSRichard Henderson uint64_t vxrs_high[16][2];
560b16f04cSRichard Henderson uint8_t reserved[128];
570b16f04cSRichard Henderson } target_sigregs_ext;
580b16f04cSRichard Henderson
590b16f04cSRichard Henderson typedef struct {
605d79bd11SRichard Henderson abi_ulong oldmask[_SIGCONTEXT_NSIG_WORDS];
615d79bd11SRichard Henderson abi_ulong sregs;
625d79bd11SRichard Henderson } target_sigcontext;
634c4c73e3SLaurent Vivier
644c4c73e3SLaurent Vivier typedef struct {
65ba02f1eaSRichard Henderson uint8_t callee_used_stack[STACK_FRAME_OVERHEAD];
665d79bd11SRichard Henderson target_sigcontext sc;
674c4c73e3SLaurent Vivier target_sigregs sregs;
684c4c73e3SLaurent Vivier int signo;
690b16f04cSRichard Henderson target_sigregs_ext sregs_ext;
704c4c73e3SLaurent Vivier } sigframe;
714c4c73e3SLaurent Vivier
720b16f04cSRichard Henderson #define TARGET_UC_VXRS 2
730b16f04cSRichard Henderson
744c4c73e3SLaurent Vivier struct target_ucontext {
755d79bd11SRichard Henderson abi_ulong tuc_flags;
765d79bd11SRichard Henderson abi_ulong tuc_link;
774c4c73e3SLaurent Vivier target_stack_t tuc_stack;
784c4c73e3SLaurent Vivier target_sigregs tuc_mcontext;
790b16f04cSRichard Henderson target_sigset_t tuc_sigmask;
800b16f04cSRichard Henderson uint8_t reserved[128 - sizeof(target_sigset_t)];
810b16f04cSRichard Henderson target_sigregs_ext tuc_mcontext_ext;
824c4c73e3SLaurent Vivier };
834c4c73e3SLaurent Vivier
844c4c73e3SLaurent Vivier typedef struct {
85ba02f1eaSRichard Henderson uint8_t callee_used_stack[STACK_FRAME_OVERHEAD];
869a12adc7SIlya Leoshkevich /*
879a12adc7SIlya Leoshkevich * This field is no longer initialized by the kernel, but it's still a part
889a12adc7SIlya Leoshkevich * of the ABI.
899a12adc7SIlya Leoshkevich */
909a12adc7SIlya Leoshkevich uint16_t svc_insn;
914c4c73e3SLaurent Vivier struct target_siginfo info;
924c4c73e3SLaurent Vivier struct target_ucontext uc;
934c4c73e3SLaurent Vivier } rt_sigframe;
944c4c73e3SLaurent Vivier
954c4c73e3SLaurent Vivier static inline abi_ulong
get_sigframe(struct target_sigaction * ka,CPUS390XState * env,size_t frame_size)964c4c73e3SLaurent Vivier get_sigframe(struct target_sigaction *ka, CPUS390XState *env, size_t frame_size)
974c4c73e3SLaurent Vivier {
984c4c73e3SLaurent Vivier abi_ulong sp;
994c4c73e3SLaurent Vivier
1004c4c73e3SLaurent Vivier /* Default to using normal stack */
101465e237bSLaurent Vivier sp = get_sp_from_cpustate(env);
1024c4c73e3SLaurent Vivier
1034c4c73e3SLaurent Vivier /* This is the X/Open sanctioned signal stack switching. */
1044c4c73e3SLaurent Vivier if (ka->sa_flags & TARGET_SA_ONSTACK) {
105465e237bSLaurent Vivier sp = target_sigsp(sp, ka);
1064c4c73e3SLaurent Vivier }
1074c4c73e3SLaurent Vivier
1084c4c73e3SLaurent Vivier /* This is the legacy signal stack switching. */
1094c4c73e3SLaurent Vivier else if (/* FIXME !user_mode(regs) */ 0 &&
1104c4c73e3SLaurent Vivier !(ka->sa_flags & TARGET_SA_RESTORER) &&
1114c4c73e3SLaurent Vivier ka->sa_restorer) {
1124c4c73e3SLaurent Vivier sp = (abi_ulong) ka->sa_restorer;
1134c4c73e3SLaurent Vivier }
1144c4c73e3SLaurent Vivier
1154c4c73e3SLaurent Vivier return (sp - frame_size) & -8ul;
1164c4c73e3SLaurent Vivier }
1174c4c73e3SLaurent Vivier
11810b81272SRichard Henderson #define PSW_USER_BITS (PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | \
11910b81272SRichard Henderson PSW_MASK_MCHECK | PSW_MASK_PSTATE | PSW_ASC_PRIMARY)
12010b81272SRichard Henderson #define PSW_MASK_USER (PSW_MASK_ASC | PSW_MASK_CC | PSW_MASK_PM | \
12110b81272SRichard Henderson PSW_MASK_64 | PSW_MASK_32)
12210b81272SRichard Henderson
save_sigregs(CPUS390XState * env,target_sigregs * sregs)1234c4c73e3SLaurent Vivier static void save_sigregs(CPUS390XState *env, target_sigregs *sregs)
1244c4c73e3SLaurent Vivier {
12510b81272SRichard Henderson uint64_t psw_mask = s390_cpu_get_psw_mask(env);
1264c4c73e3SLaurent Vivier int i;
1274c4c73e3SLaurent Vivier
12882839490SRichard Henderson /*
12982839490SRichard Henderson * Copy a 'clean' PSW mask to the user to avoid leaking
13082839490SRichard Henderson * information about whether PER is currently on.
13110b81272SRichard Henderson * TODO: qemu does not support PSW_MASK_RI; it will never be set.
13282839490SRichard Henderson */
13310b81272SRichard Henderson psw_mask = PSW_USER_BITS | (psw_mask & PSW_MASK_USER);
13410b81272SRichard Henderson __put_user(psw_mask, &sregs->regs.psw.mask);
1354c4c73e3SLaurent Vivier __put_user(env->psw.addr, &sregs->regs.psw.addr);
13682839490SRichard Henderson
1374c4c73e3SLaurent Vivier for (i = 0; i < 16; i++) {
1384c4c73e3SLaurent Vivier __put_user(env->regs[i], &sregs->regs.gprs[i]);
1394c4c73e3SLaurent Vivier }
1404c4c73e3SLaurent Vivier for (i = 0; i < 16; i++) {
1414c4c73e3SLaurent Vivier __put_user(env->aregs[i], &sregs->regs.acrs[i]);
1424c4c73e3SLaurent Vivier }
14382839490SRichard Henderson
1444c4c73e3SLaurent Vivier /*
1454c4c73e3SLaurent Vivier * We have to store the fp registers to current->thread.fp_regs
1464c4c73e3SLaurent Vivier * to merge them with the emulated registers.
1474c4c73e3SLaurent Vivier */
1482941e0faSIlya Leoshkevich __put_user(env->fpc, &sregs->fpregs.fpc);
1494c4c73e3SLaurent Vivier for (i = 0; i < 16; i++) {
1504f83d7d2SDavid Hildenbrand __put_user(*get_freg(env, i), &sregs->fpregs.fprs[i]);
1514c4c73e3SLaurent Vivier }
1524c4c73e3SLaurent Vivier }
1534c4c73e3SLaurent Vivier
save_sigregs_ext(CPUS390XState * env,target_sigregs_ext * ext)1540b16f04cSRichard Henderson static void save_sigregs_ext(CPUS390XState *env, target_sigregs_ext *ext)
1550b16f04cSRichard Henderson {
1560b16f04cSRichard Henderson int i;
1570b16f04cSRichard Henderson
1580b16f04cSRichard Henderson /*
1590b16f04cSRichard Henderson * if (MACHINE_HAS_VX) ...
1600b16f04cSRichard Henderson * That said, we always allocate the stack storage and the
1610b16f04cSRichard Henderson * space is always available in env.
1620b16f04cSRichard Henderson */
1630b16f04cSRichard Henderson for (i = 0; i < 16; ++i) {
1640b16f04cSRichard Henderson __put_user(env->vregs[i][1], &ext->vxrs_low[i]);
1650b16f04cSRichard Henderson }
1660b16f04cSRichard Henderson for (i = 0; i < 16; ++i) {
1670b16f04cSRichard Henderson __put_user(env->vregs[i + 16][0], &ext->vxrs_high[i][0]);
1680b16f04cSRichard Henderson __put_user(env->vregs[i + 16][1], &ext->vxrs_high[i][1]);
1690b16f04cSRichard Henderson }
1700b16f04cSRichard Henderson }
1710b16f04cSRichard Henderson
setup_frame(int sig,struct target_sigaction * ka,target_sigset_t * set,CPUS390XState * env)1724c4c73e3SLaurent Vivier void setup_frame(int sig, struct target_sigaction *ka,
1734c4c73e3SLaurent Vivier target_sigset_t *set, CPUS390XState *env)
1744c4c73e3SLaurent Vivier {
1754c4c73e3SLaurent Vivier sigframe *frame;
1764c4c73e3SLaurent Vivier abi_ulong frame_addr;
17779d6f2baSRichard Henderson abi_ulong restorer;
1784c4c73e3SLaurent Vivier
1794c4c73e3SLaurent Vivier frame_addr = get_sigframe(ka, env, sizeof(*frame));
1804c4c73e3SLaurent Vivier trace_user_setup_frame(env, frame_addr);
1814c4c73e3SLaurent Vivier if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
18220807348SRichard Henderson force_sigsegv(sig);
18320807348SRichard Henderson return;
1844c4c73e3SLaurent Vivier }
1854c4c73e3SLaurent Vivier
18679d6f2baSRichard Henderson /* Set up backchain. */
18779d6f2baSRichard Henderson __put_user(env->regs[15], (abi_ulong *) frame);
18879d6f2baSRichard Henderson
18979d6f2baSRichard Henderson /* Create struct sigcontext on the signal stack. */
1909e0fb648SRichard Henderson /* Make sure that we're initializing all of oldmask. */
1919e0fb648SRichard Henderson QEMU_BUILD_BUG_ON(ARRAY_SIZE(frame->sc.oldmask) != 1);
1924c4c73e3SLaurent Vivier __put_user(set->sig[0], &frame->sc.oldmask[0]);
1934e4a0820SRichard Henderson __put_user(frame_addr + offsetof(sigframe, sregs), &frame->sc.sregs);
1944c4c73e3SLaurent Vivier
19579d6f2baSRichard Henderson /* Create _sigregs on the signal stack */
19679d6f2baSRichard Henderson save_sigregs(env, &frame->sregs);
19779d6f2baSRichard Henderson
19879d6f2baSRichard Henderson /*
19979d6f2baSRichard Henderson * ??? The kernel uses regs->gprs[2] here, which is not yet the signo.
20079d6f2baSRichard Henderson * Moreover the comment talks about allowing backtrace, which is really
20179d6f2baSRichard Henderson * done by the r15 copy above.
20279d6f2baSRichard Henderson */
20379d6f2baSRichard Henderson __put_user(sig, &frame->signo);
20479d6f2baSRichard Henderson
2050b16f04cSRichard Henderson /* Create sigregs_ext on the signal stack. */
2060b16f04cSRichard Henderson save_sigregs_ext(env, &frame->sregs_ext);
2070b16f04cSRichard Henderson
20879d6f2baSRichard Henderson /*
20979d6f2baSRichard Henderson * Set up to return from userspace.
21079d6f2baSRichard Henderson * If provided, use a stub already in userspace.
21179d6f2baSRichard Henderson */
2124c4c73e3SLaurent Vivier if (ka->sa_flags & TARGET_SA_RESTORER) {
21379d6f2baSRichard Henderson restorer = ka->sa_restorer;
2144c4c73e3SLaurent Vivier } else {
21531330e6cSRichard Henderson restorer = default_sigreturn;
2164c4c73e3SLaurent Vivier }
2174c4c73e3SLaurent Vivier
2184c4c73e3SLaurent Vivier /* Set up registers for signal handler */
21979d6f2baSRichard Henderson env->regs[14] = restorer;
2204c4c73e3SLaurent Vivier env->regs[15] = frame_addr;
2217e535557SRichard Henderson /* Force default amode and default user address space control. */
2227e535557SRichard Henderson env->psw.mask = PSW_MASK_64 | PSW_MASK_32 | PSW_ASC_PRIMARY
2237e535557SRichard Henderson | (env->psw.mask & ~PSW_MASK_ASC);
224915c69dcSRichard Henderson env->psw.addr = ka->_sa_handler;
2254c4c73e3SLaurent Vivier
2266c18757dSRichard Henderson env->regs[2] = sig;
227ac1a92ecSRichard Henderson env->regs[3] = frame_addr + offsetof(typeof(*frame), sc);
2284c4c73e3SLaurent Vivier
2296c18757dSRichard Henderson /*
2306c18757dSRichard Henderson * We forgot to include these in the sigcontext.
2316c18757dSRichard Henderson * To avoid breaking binary compatibility, they are passed as args.
2326c18757dSRichard Henderson */
2336c18757dSRichard Henderson env->regs[4] = 0; /* FIXME: regs->int_code & 127 */
2346c18757dSRichard Henderson env->regs[5] = 0; /* FIXME: regs->int_parm_long */
2356c18757dSRichard Henderson env->regs[6] = 0; /* FIXME: current->thread.last_break */
2364c4c73e3SLaurent Vivier
2374c4c73e3SLaurent Vivier unlock_user_struct(frame, frame_addr, 1);
2384c4c73e3SLaurent Vivier }
2394c4c73e3SLaurent Vivier
setup_rt_frame(int sig,struct target_sigaction * ka,target_siginfo_t * info,target_sigset_t * set,CPUS390XState * env)2404c4c73e3SLaurent Vivier void setup_rt_frame(int sig, struct target_sigaction *ka,
2414c4c73e3SLaurent Vivier target_siginfo_t *info,
2424c4c73e3SLaurent Vivier target_sigset_t *set, CPUS390XState *env)
2434c4c73e3SLaurent Vivier {
2444c4c73e3SLaurent Vivier rt_sigframe *frame;
2454c4c73e3SLaurent Vivier abi_ulong frame_addr;
24679d6f2baSRichard Henderson abi_ulong restorer;
2470b16f04cSRichard Henderson abi_ulong uc_flags;
2484c4c73e3SLaurent Vivier
2494c4c73e3SLaurent Vivier frame_addr = get_sigframe(ka, env, sizeof *frame);
2504c4c73e3SLaurent Vivier trace_user_setup_rt_frame(env, frame_addr);
2514c4c73e3SLaurent Vivier if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
25220807348SRichard Henderson force_sigsegv(sig);
25320807348SRichard Henderson return;
2544c4c73e3SLaurent Vivier }
2554c4c73e3SLaurent Vivier
25679d6f2baSRichard Henderson /* Set up backchain. */
25779d6f2baSRichard Henderson __put_user(env->regs[15], (abi_ulong *) frame);
2584c4c73e3SLaurent Vivier
25979d6f2baSRichard Henderson /*
26079d6f2baSRichard Henderson * Set up to return from userspace.
26179d6f2baSRichard Henderson * If provided, use a stub already in userspace.
26279d6f2baSRichard Henderson */
2634c4c73e3SLaurent Vivier if (ka->sa_flags & TARGET_SA_RESTORER) {
26479d6f2baSRichard Henderson restorer = ka->sa_restorer;
2654c4c73e3SLaurent Vivier } else {
26631330e6cSRichard Henderson restorer = default_rt_sigreturn;
2674c4c73e3SLaurent Vivier }
2684c4c73e3SLaurent Vivier
26979d6f2baSRichard Henderson /* Create siginfo on the signal stack. */
2704d6d8a05SGustavo Romero frame->info = *info;
27179d6f2baSRichard Henderson
27279d6f2baSRichard Henderson /* Create ucontext on the signal stack. */
2730b16f04cSRichard Henderson uc_flags = 0;
2740b16f04cSRichard Henderson if (s390_has_feat(S390_FEAT_VECTOR)) {
2750b16f04cSRichard Henderson uc_flags |= TARGET_UC_VXRS;
2760b16f04cSRichard Henderson }
2770b16f04cSRichard Henderson __put_user(uc_flags, &frame->uc.tuc_flags);
27879d6f2baSRichard Henderson __put_user(0, &frame->uc.tuc_link);
27979d6f2baSRichard Henderson target_save_altstack(&frame->uc.tuc_stack, env);
28079d6f2baSRichard Henderson save_sigregs(env, &frame->uc.tuc_mcontext);
2810b16f04cSRichard Henderson save_sigregs_ext(env, &frame->uc.tuc_mcontext_ext);
28279d6f2baSRichard Henderson tswap_sigset(&frame->uc.tuc_sigmask, set);
2834c4c73e3SLaurent Vivier
2844c4c73e3SLaurent Vivier /* Set up registers for signal handler */
28579d6f2baSRichard Henderson env->regs[14] = restorer;
2864c4c73e3SLaurent Vivier env->regs[15] = frame_addr;
2877e535557SRichard Henderson /* Force default amode and default user address space control. */
2887e535557SRichard Henderson env->psw.mask = PSW_MASK_64 | PSW_MASK_32 | PSW_ASC_PRIMARY
2897e535557SRichard Henderson | (env->psw.mask & ~PSW_MASK_ASC);
290915c69dcSRichard Henderson env->psw.addr = ka->_sa_handler;
2914c4c73e3SLaurent Vivier
2926c18757dSRichard Henderson env->regs[2] = sig;
2934c4c73e3SLaurent Vivier env->regs[3] = frame_addr + offsetof(typeof(*frame), info);
2944c4c73e3SLaurent Vivier env->regs[4] = frame_addr + offsetof(typeof(*frame), uc);
2956c18757dSRichard Henderson env->regs[5] = 0; /* FIXME: current->thread.last_break */
2964c4c73e3SLaurent Vivier }
2974c4c73e3SLaurent Vivier
restore_sigregs(CPUS390XState * env,target_sigregs * sc)298e6f960fcSRichard Henderson static void restore_sigregs(CPUS390XState *env, target_sigregs *sc)
2994c4c73e3SLaurent Vivier {
30010b81272SRichard Henderson uint64_t prev_addr, prev_mask, mask, addr;
3014c4c73e3SLaurent Vivier int i;
3024c4c73e3SLaurent Vivier
3034c4c73e3SLaurent Vivier for (i = 0; i < 16; i++) {
3044c4c73e3SLaurent Vivier __get_user(env->regs[i], &sc->regs.gprs[i]);
3054c4c73e3SLaurent Vivier }
3064c4c73e3SLaurent Vivier
307bd45be9fSRichard Henderson prev_addr = env->psw.addr;
30810b81272SRichard Henderson __get_user(mask, &sc->regs.psw.mask);
30910b81272SRichard Henderson __get_user(addr, &sc->regs.psw.addr);
31010b81272SRichard Henderson trace_user_s390x_restore_sigregs(env, addr, prev_addr);
31110b81272SRichard Henderson
31210b81272SRichard Henderson /*
31310b81272SRichard Henderson * Use current psw.mask to preserve PER bit.
31410b81272SRichard Henderson * TODO:
31510b81272SRichard Henderson * if (!is_ri_task(current) && (user_sregs.regs.psw.mask & PSW_MASK_RI))
31610b81272SRichard Henderson * return -EINVAL;
31710b81272SRichard Henderson * Simply do not allow it to be set in mask.
31810b81272SRichard Henderson */
31910b81272SRichard Henderson prev_mask = s390_cpu_get_psw_mask(env);
32010b81272SRichard Henderson mask = (prev_mask & ~PSW_MASK_USER) | (mask & PSW_MASK_USER);
32110b81272SRichard Henderson /* Check for invalid user address space control. */
32210b81272SRichard Henderson if ((mask & PSW_MASK_ASC) == PSW_ASC_HOME) {
32310b81272SRichard Henderson mask = (mask & ~PSW_MASK_ASC) | PSW_ASC_PRIMARY;
32410b81272SRichard Henderson }
32510b81272SRichard Henderson /* Check for invalid amode. */
32610b81272SRichard Henderson if (mask & PSW_MASK_64) {
32710b81272SRichard Henderson mask |= PSW_MASK_32;
32810b81272SRichard Henderson }
32910b81272SRichard Henderson s390_cpu_set_psw(env, mask, addr);
3304c4c73e3SLaurent Vivier
3314c4c73e3SLaurent Vivier for (i = 0; i < 16; i++) {
3324c4c73e3SLaurent Vivier __get_user(env->aregs[i], &sc->regs.acrs[i]);
3334c4c73e3SLaurent Vivier }
3342941e0faSIlya Leoshkevich __get_user(env->fpc, &sc->fpregs.fpc);
3354c4c73e3SLaurent Vivier for (i = 0; i < 16; i++) {
3364f83d7d2SDavid Hildenbrand __get_user(*get_freg(env, i), &sc->fpregs.fprs[i]);
3374c4c73e3SLaurent Vivier }
3384c4c73e3SLaurent Vivier }
3394c4c73e3SLaurent Vivier
restore_sigregs_ext(CPUS390XState * env,target_sigregs_ext * ext)3400b16f04cSRichard Henderson static void restore_sigregs_ext(CPUS390XState *env, target_sigregs_ext *ext)
3410b16f04cSRichard Henderson {
3420b16f04cSRichard Henderson int i;
3430b16f04cSRichard Henderson
3440b16f04cSRichard Henderson /*
3450b16f04cSRichard Henderson * if (MACHINE_HAS_VX) ...
3460b16f04cSRichard Henderson * That said, we always allocate the stack storage and the
3470b16f04cSRichard Henderson * space is always available in env.
3480b16f04cSRichard Henderson */
3490b16f04cSRichard Henderson for (i = 0; i < 16; ++i) {
3500b16f04cSRichard Henderson __get_user(env->vregs[i][1], &ext->vxrs_low[i]);
3510b16f04cSRichard Henderson }
3520b16f04cSRichard Henderson for (i = 0; i < 16; ++i) {
3530b16f04cSRichard Henderson __get_user(env->vregs[i + 16][0], &ext->vxrs_high[i][0]);
3540b16f04cSRichard Henderson __get_user(env->vregs[i + 16][1], &ext->vxrs_high[i][1]);
3550b16f04cSRichard Henderson }
3560b16f04cSRichard Henderson }
3570b16f04cSRichard Henderson
do_sigreturn(CPUS390XState * env)3584c4c73e3SLaurent Vivier long do_sigreturn(CPUS390XState *env)
3594c4c73e3SLaurent Vivier {
3604c4c73e3SLaurent Vivier sigframe *frame;
3614c4c73e3SLaurent Vivier abi_ulong frame_addr = env->regs[15];
3624c4c73e3SLaurent Vivier target_sigset_t target_set;
3634c4c73e3SLaurent Vivier sigset_t set;
3644c4c73e3SLaurent Vivier
3654c4c73e3SLaurent Vivier trace_user_do_sigreturn(env, frame_addr);
3664c4c73e3SLaurent Vivier if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
36720807348SRichard Henderson force_sig(TARGET_SIGSEGV);
36857a0c938SRichard Henderson return -QEMU_ESIGRETURN;
3694c4c73e3SLaurent Vivier }
3709e0fb648SRichard Henderson
3719e0fb648SRichard Henderson /* Make sure that we're initializing all of target_set. */
3729e0fb648SRichard Henderson QEMU_BUILD_BUG_ON(ARRAY_SIZE(target_set.sig) != 1);
3734c4c73e3SLaurent Vivier __get_user(target_set.sig[0], &frame->sc.oldmask[0]);
3744c4c73e3SLaurent Vivier
3754c4c73e3SLaurent Vivier target_to_host_sigset_internal(&set, &target_set);
3764c4c73e3SLaurent Vivier set_sigmask(&set); /* ~_BLOCKABLE? */
3774c4c73e3SLaurent Vivier
378e6f960fcSRichard Henderson restore_sigregs(env, &frame->sregs);
3790b16f04cSRichard Henderson restore_sigregs_ext(env, &frame->sregs_ext);
3804c4c73e3SLaurent Vivier
3814c4c73e3SLaurent Vivier unlock_user_struct(frame, frame_addr, 0);
38257a0c938SRichard Henderson return -QEMU_ESIGRETURN;
3834c4c73e3SLaurent Vivier }
3844c4c73e3SLaurent Vivier
do_rt_sigreturn(CPUS390XState * env)3854c4c73e3SLaurent Vivier long do_rt_sigreturn(CPUS390XState *env)
3864c4c73e3SLaurent Vivier {
3874c4c73e3SLaurent Vivier rt_sigframe *frame;
3884c4c73e3SLaurent Vivier abi_ulong frame_addr = env->regs[15];
3894c4c73e3SLaurent Vivier sigset_t set;
3904c4c73e3SLaurent Vivier
3914c4c73e3SLaurent Vivier trace_user_do_rt_sigreturn(env, frame_addr);
3924c4c73e3SLaurent Vivier if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
39320807348SRichard Henderson force_sig(TARGET_SIGSEGV);
39457a0c938SRichard Henderson return -QEMU_ESIGRETURN;
3954c4c73e3SLaurent Vivier }
3964c4c73e3SLaurent Vivier target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
3974c4c73e3SLaurent Vivier
3984c4c73e3SLaurent Vivier set_sigmask(&set); /* ~_BLOCKABLE? */
3994c4c73e3SLaurent Vivier
400e6f960fcSRichard Henderson restore_sigregs(env, &frame->uc.tuc_mcontext);
4010b16f04cSRichard Henderson restore_sigregs_ext(env, &frame->uc.tuc_mcontext_ext);
4024c4c73e3SLaurent Vivier
403ddc3e74dSRichard Henderson target_restore_altstack(&frame->uc.tuc_stack, env);
40456384cf3SRichard Henderson
4054c4c73e3SLaurent Vivier unlock_user_struct(frame, frame_addr, 0);
40657a0c938SRichard Henderson return -QEMU_ESIGRETURN;
4074c4c73e3SLaurent Vivier }
40831330e6cSRichard Henderson
setup_sigtramp(abi_ulong sigtramp_page)40931330e6cSRichard Henderson void setup_sigtramp(abi_ulong sigtramp_page)
41031330e6cSRichard Henderson {
41131330e6cSRichard Henderson uint16_t *tramp = lock_user(VERIFY_WRITE, sigtramp_page, 2 + 2, 0);
41231330e6cSRichard Henderson assert(tramp != NULL);
41331330e6cSRichard Henderson
41431330e6cSRichard Henderson default_sigreturn = sigtramp_page;
41531330e6cSRichard Henderson __put_user(S390_SYSCALL_OPCODE | TARGET_NR_sigreturn, &tramp[0]);
41631330e6cSRichard Henderson
41731330e6cSRichard Henderson default_rt_sigreturn = sigtramp_page + 2;
41831330e6cSRichard Henderson __put_user(S390_SYSCALL_OPCODE | TARGET_NR_rt_sigreturn, &tramp[1]);
41931330e6cSRichard Henderson
42031330e6cSRichard Henderson unlock_user(tramp, sigtramp_page, 2 + 2);
42131330e6cSRichard Henderson }
422