1 /*
2  * host-signal.h: signal info dependent on the host architecture
3  *
4  * Copyright (C) 2021 Linaro Limited
5  *
6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
7  * See the COPYING file in the top-level directory.
8  */
9 
10 #ifndef X86_64_HOST_SIGNAL_H
11 #define X86_64_HOST_SIGNAL_H
12 
13 /* The third argument to a SA_SIGINFO handler is ucontext_t. */
14 typedef ucontext_t host_sigcontext;
15 
16 static inline uintptr_t host_signal_pc(host_sigcontext *uc)
17 {
18     return uc->uc_mcontext.gregs[REG_RIP];
19 }
20 
21 static inline void host_signal_set_pc(host_sigcontext *uc, uintptr_t pc)
22 {
23     uc->uc_mcontext.gregs[REG_RIP] = pc;
24 }
25 
26 static inline void *host_signal_mask(host_sigcontext *uc)
27 {
28     return &uc->uc_sigmask;
29 }
30 
31 static inline bool host_signal_write(siginfo_t *info, host_sigcontext *uc)
32 {
33     return uc->uc_mcontext.gregs[REG_TRAPNO] == 0xe
34         && (uc->uc_mcontext.gregs[REG_ERR] & 0x2);
35 }
36 
37 #endif
38