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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 | */ | |
19 | ||
20 | #ifndef SIGNAL_COMMON_H | |
21 | #define SIGNAL_COMMON_H | |
befb7447 | 22 | |
5da4063f RH |
23 | #include "special-errno.h" |
24 | ||
db2af69d RH |
25 | /* Fallback addresses into sigtramp page. */ |
26 | extern abi_ulong default_sigreturn; | |
27 | extern abi_ulong default_rt_sigreturn; | |
28 | ||
29 | void setup_sigtramp(abi_ulong tramp_page); | |
30 | ||
465e237b LV |
31 | int on_sig_stack(unsigned long sp); |
32 | int sas_ss_flags(unsigned long sp); | |
33 | abi_ulong target_sigsp(abi_ulong sp, struct target_sigaction *ka); | |
34 | void target_save_altstack(target_stack_t *uss, CPUArchState *env); | |
ddc3e74d | 35 | abi_long target_restore_altstack(target_stack_t *uss, CPUArchState *env); |
befb7447 LV |
36 | |
37 | static inline void target_sigemptyset(target_sigset_t *set) | |
38 | { | |
39 | memset(set, 0, sizeof(*set)); | |
40 | } | |
41 | ||
42 | void host_to_target_sigset_internal(target_sigset_t *d, | |
43 | const sigset_t *s); | |
44 | void target_to_host_sigset_internal(sigset_t *d, | |
45 | const target_sigset_t *s); | |
46 | void tswap_siginfo(target_siginfo_t *tinfo, | |
47 | const target_siginfo_t *info); | |
48 | void set_sigmask(const sigset_t *set); | |
49 | void force_sig(int sig); | |
50 | void force_sigsegv(int oldsig); | |
af796960 | 51 | void force_sig_fault(int sig, int code, abi_ulong addr); |
cb6ac802 LV |
52 | #if defined(TARGET_ARCH_HAS_SETUP_FRAME) |
53 | void setup_frame(int sig, struct target_sigaction *ka, | |
54 | target_sigset_t *set, CPUArchState *env); | |
55 | #endif | |
56 | void setup_rt_frame(int sig, struct target_sigaction *ka, | |
57 | target_siginfo_t *info, | |
58 | target_sigset_t *set, CPUArchState *env); | |
2113aed6 PM |
59 | |
60 | void process_pending_signals(CPUArchState *cpu_env); | |
61 | void signal_init(void); | |
62 | int queue_signal(CPUArchState *env, int sig, int si_type, | |
63 | target_siginfo_t *info); | |
64 | void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info); | |
65 | void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo); | |
66 | int target_to_host_signal(int sig); | |
67 | int host_to_target_signal(int sig); | |
68 | long do_sigreturn(CPUArchState *env); | |
69 | long do_rt_sigreturn(CPUArchState *env); | |
70 | abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, | |
71 | CPUArchState *env); | |
72 | int do_sigprocmask(int how, const sigset_t *set, sigset_t *oldset); | |
73 | abi_long do_swapcontext(CPUArchState *env, abi_ulong uold_ctx, | |
74 | abi_ulong unew_ctx, abi_long ctx_size); | |
75 | /** | |
76 | * block_signals: block all signals while handling this guest syscall | |
77 | * | |
78 | * Block all signals, and arrange that the signal mask is returned to | |
79 | * its correct value for the guest before we resume execution of guest code. | |
80 | * If this function returns non-zero, then the caller should immediately | |
af254a27 | 81 | * return -QEMU_ERESTARTSYS to the main loop, which will take the pending |
2113aed6 PM |
82 | * signal and restart execution of the syscall. |
83 | * If block_signals() returns zero, then the caller can continue with | |
84 | * emulation of the system call knowing that no signals can be taken | |
85 | * (and therefore that no race conditions will result). | |
86 | * This should only be called once, because if it is called a second time | |
87 | * it will always return non-zero. (Think of it like a mutex that can't | |
88 | * be recursively locked.) | |
89 | * Signals will be unblocked again by process_pending_signals(). | |
90 | * | |
91 | * Return value: non-zero if there was a pending signal, zero if not. | |
92 | */ | |
93 | int block_signals(void); /* Returns non zero if signal pending */ | |
94 | ||
befb7447 | 95 | #endif |