1 /* 2 * host-signal.h: signal info dependent on the host architecture 3 * 4 * Copyright (c) 2021 Warner Losh 5 * 6 * SPDX-License-Identifier: GPL-2.0-or-later 7 */ 8 9 #ifndef I386_HOST_SIGNAL_H 10 #define I386_HOST_SIGNAL_H 11 12 #include <sys/ucontext.h> 13 #include <machine/trap.h> 14 #include <vm/pmap.h> 15 #include <machine/pmap.h> 16 17 static inline uintptr_t host_signal_pc(ucontext_t *uc) 18 { 19 return uc->uc_mcontext.mc_eip; 20 } 21 22 static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc) 23 { 24 uc->uc_mcontext.mc_eip = pc; 25 } 26 27 static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc) 28 { 29 /* 30 * Look in sys/i386/i386/trap.c. NOTE: mc_err == tr_err due to type punning 31 * between a trapframe and mcontext on FreeBSD/i386. 32 */ 33 return uc->uc_mcontext.mc_trapno == T_PAGEFLT && 34 uc->uc_mcontext.mc_err & PGEX_W; 35 } 36 37 #endif 38