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 */
19befb7447SLaurent Vivier
20befb7447SLaurent Vivier #ifndef SIGNAL_COMMON_H
21befb7447SLaurent Vivier #define SIGNAL_COMMON_H
22befb7447SLaurent Vivier
235da4063fSRichard Henderson #include "special-errno.h"
245da4063fSRichard Henderson
25db2af69dSRichard Henderson /* Fallback addresses into sigtramp page. */
26db2af69dSRichard Henderson extern abi_ulong default_sigreturn;
27db2af69dSRichard Henderson extern abi_ulong default_rt_sigreturn;
28db2af69dSRichard Henderson
29db2af69dSRichard Henderson void setup_sigtramp(abi_ulong tramp_page);
30db2af69dSRichard Henderson
31465e237bSLaurent Vivier int on_sig_stack(unsigned long sp);
32465e237bSLaurent Vivier int sas_ss_flags(unsigned long sp);
33465e237bSLaurent Vivier abi_ulong target_sigsp(abi_ulong sp, struct target_sigaction *ka);
34465e237bSLaurent Vivier void target_save_altstack(target_stack_t *uss, CPUArchState *env);
35ddc3e74dSRichard Henderson abi_long target_restore_altstack(target_stack_t *uss, CPUArchState *env);
36befb7447SLaurent Vivier
target_sigemptyset(target_sigset_t * set)37befb7447SLaurent Vivier static inline void target_sigemptyset(target_sigset_t *set)
38befb7447SLaurent Vivier {
39befb7447SLaurent Vivier memset(set, 0, sizeof(*set));
40befb7447SLaurent Vivier }
41befb7447SLaurent Vivier
42befb7447SLaurent Vivier void host_to_target_sigset_internal(target_sigset_t *d,
43befb7447SLaurent Vivier const sigset_t *s);
44befb7447SLaurent Vivier void target_to_host_sigset_internal(sigset_t *d,
45befb7447SLaurent Vivier const target_sigset_t *s);
46befb7447SLaurent Vivier void set_sigmask(const sigset_t *set);
47befb7447SLaurent Vivier void force_sig(int sig);
48befb7447SLaurent Vivier void force_sigsegv(int oldsig);
49af796960SPeter Maydell void force_sig_fault(int sig, int code, abi_ulong addr);
50cb6ac802SLaurent Vivier #if defined(TARGET_ARCH_HAS_SETUP_FRAME)
51cb6ac802SLaurent Vivier void setup_frame(int sig, struct target_sigaction *ka,
52cb6ac802SLaurent Vivier target_sigset_t *set, CPUArchState *env);
53cb6ac802SLaurent Vivier #endif
54cb6ac802SLaurent Vivier void setup_rt_frame(int sig, struct target_sigaction *ka,
55cb6ac802SLaurent Vivier target_siginfo_t *info,
56cb6ac802SLaurent Vivier target_sigset_t *set, CPUArchState *env);
572113aed6SPeter Maydell
582113aed6SPeter Maydell void process_pending_signals(CPUArchState *cpu_env);
592113aed6SPeter Maydell void signal_init(void);
60337e88d8SPeter Maydell void queue_signal(CPUArchState *env, int sig, int si_type,
612113aed6SPeter Maydell target_siginfo_t *info);
622113aed6SPeter Maydell void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
632113aed6SPeter Maydell void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
642113aed6SPeter Maydell int target_to_host_signal(int sig);
652113aed6SPeter Maydell int host_to_target_signal(int sig);
662113aed6SPeter Maydell long do_sigreturn(CPUArchState *env);
672113aed6SPeter Maydell long do_rt_sigreturn(CPUArchState *env);
682113aed6SPeter Maydell abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr,
692113aed6SPeter Maydell CPUArchState *env);
702113aed6SPeter Maydell int do_sigprocmask(int how, const sigset_t *set, sigset_t *oldset);
712113aed6SPeter Maydell abi_long do_swapcontext(CPUArchState *env, abi_ulong uold_ctx,
722113aed6SPeter Maydell abi_ulong unew_ctx, abi_long ctx_size);
732113aed6SPeter Maydell /**
742113aed6SPeter Maydell * block_signals: block all signals while handling this guest syscall
752113aed6SPeter Maydell *
762113aed6SPeter Maydell * Block all signals, and arrange that the signal mask is returned to
772113aed6SPeter Maydell * its correct value for the guest before we resume execution of guest code.
782113aed6SPeter Maydell * If this function returns non-zero, then the caller should immediately
79af254a27SRichard Henderson * return -QEMU_ERESTARTSYS to the main loop, which will take the pending
802113aed6SPeter Maydell * signal and restart execution of the syscall.
812113aed6SPeter Maydell * If block_signals() returns zero, then the caller can continue with
822113aed6SPeter Maydell * emulation of the system call knowing that no signals can be taken
832113aed6SPeter Maydell * (and therefore that no race conditions will result).
842113aed6SPeter Maydell * This should only be called once, because if it is called a second time
852113aed6SPeter Maydell * it will always return non-zero. (Think of it like a mutex that can't
862113aed6SPeter Maydell * be recursively locked.)
872113aed6SPeter Maydell * Signals will be unblocked again by process_pending_signals().
882113aed6SPeter Maydell *
892113aed6SPeter Maydell * Return value: non-zero if there was a pending signal, zero if not.
902113aed6SPeter Maydell */
912113aed6SPeter Maydell int block_signals(void); /* Returns non zero if signal pending */
922113aed6SPeter Maydell
930a99f093SRichard Henderson /**
940a99f093SRichard Henderson * process_sigsuspend_mask: read and apply syscall-local signal mask
950a99f093SRichard Henderson *
960a99f093SRichard Henderson * Read the guest signal mask from @sigset, length @sigsize.
970a99f093SRichard Henderson * Convert that to a host signal mask and save it to sigpending_mask.
980a99f093SRichard Henderson *
990a99f093SRichard Henderson * Return value: negative target errno, or zero;
1000a99f093SRichard Henderson * store &sigpending_mask into *pset on success.
1010a99f093SRichard Henderson */
1020a99f093SRichard Henderson int process_sigsuspend_mask(sigset_t **pset, target_ulong sigset,
1030a99f093SRichard Henderson target_ulong sigsize);
1040a99f093SRichard Henderson
1050a99f093SRichard Henderson /**
1060a99f093SRichard Henderson * finish_sigsuspend_mask: finish a sigsuspend-like syscall
1070a99f093SRichard Henderson *
1080a99f093SRichard Henderson * Set in_sigsuspend if we need to use the modified sigset
1090a99f093SRichard Henderson * during process_pending_signals.
1100a99f093SRichard Henderson */
finish_sigsuspend_mask(int ret)1110a99f093SRichard Henderson static inline void finish_sigsuspend_mask(int ret)
1120a99f093SRichard Henderson {
1130a99f093SRichard Henderson if (ret != -QEMU_ERESTARTSYS) {
114*e4e5cb4aSIlya Leoshkevich TaskState *ts = get_task_state(thread_cpu);
1150a99f093SRichard Henderson ts->in_sigsuspend = 1;
1160a99f093SRichard Henderson }
1170a99f093SRichard Henderson }
1180a99f093SRichard Henderson
1197b72aa1dSHelge Deller #if defined(SIGSTKFLT) && defined(TARGET_SIGSTKFLT)
1207b72aa1dSHelge Deller #define MAKE_SIG_ENTRY_SIGSTKFLT MAKE_SIG_ENTRY(SIGSTKFLT)
1217b72aa1dSHelge Deller #else
1227b72aa1dSHelge Deller #define MAKE_SIG_ENTRY_SIGSTKFLT
1237b72aa1dSHelge Deller #endif
1247b72aa1dSHelge Deller
1257b72aa1dSHelge Deller #if defined(SIGIOT) && defined(TARGET_SIGIOT)
1267b72aa1dSHelge Deller #define MAKE_SIG_ENTRY_SIGIOT MAKE_SIG_ENTRY(SIGIOT)
1277b72aa1dSHelge Deller #else
1287b72aa1dSHelge Deller #define MAKE_SIG_ENTRY_SIGIOT
1297b72aa1dSHelge Deller #endif
1307b72aa1dSHelge Deller
1317b72aa1dSHelge Deller #define MAKE_SIGNAL_LIST \
1327b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGHUP) \
1337b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGINT) \
1347b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGQUIT) \
1357b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGILL) \
1367b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGTRAP) \
1377b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGABRT) \
1387b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGBUS) \
1397b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGFPE) \
1407b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGKILL) \
1417b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGUSR1) \
1427b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGSEGV) \
1437b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGUSR2) \
1447b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGPIPE) \
1457b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGALRM) \
1467b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGTERM) \
1477b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGCHLD) \
1487b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGCONT) \
1497b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGSTOP) \
1507b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGTSTP) \
1517b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGTTIN) \
1527b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGTTOU) \
1537b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGURG) \
1547b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGXCPU) \
1557b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGXFSZ) \
1567b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGVTALRM) \
1577b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGPROF) \
1587b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGWINCH) \
1597b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGIO) \
1607b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGPWR) \
1617b72aa1dSHelge Deller MAKE_SIG_ENTRY(SIGSYS) \
1627b72aa1dSHelge Deller MAKE_SIG_ENTRY_SIGSTKFLT \
1637b72aa1dSHelge Deller MAKE_SIG_ENTRY_SIGIOT
1647b72aa1dSHelge Deller
165befb7447SLaurent Vivier #endif
166