1 /*
2  * host-signal.h: signal info dependent on the host architecture
3  *
4  * Copyright (c) 2003-2005 Fabrice Bellard
5  * Copyright (c) 2021 Linaro Limited
6  *
7  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
8  * See the COPYING file in the top-level directory.
9  */
10 
11 #ifndef I386_HOST_SIGNAL_H
12 #define I386_HOST_SIGNAL_H
13 
14 /* The third argument to a SA_SIGINFO handler is ucontext_t. */
15 typedef ucontext_t host_sigcontext;
16 
17 static inline uintptr_t host_signal_pc(host_sigcontext *uc)
18 {
19     return uc->uc_mcontext.gregs[REG_EIP];
20 }
21 
22 static inline void host_signal_set_pc(host_sigcontext *uc, uintptr_t pc)
23 {
24     uc->uc_mcontext.gregs[REG_EIP] = pc;
25 }
26 
27 static inline void *host_signal_mask(host_sigcontext *uc)
28 {
29     return &uc->uc_sigmask;
30 }
31 
32 static inline bool host_signal_write(siginfo_t *info, host_sigcontext *uc)
33 {
34     return uc->uc_mcontext.gregs[REG_TRAPNO] == 0xe
35         && (uc->uc_mcontext.gregs[REG_ERR] & 0x2);
36 }
37 
38 #endif
39