| 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/param.h> |
| 13 | #include <sys/ucontext.h> |
| 14 | #include <machine/trap.h> |
| 15 | #include <vm/pmap.h> |
| 16 | #include <machine/pmap.h> |
| 17 | |
| 18 | static inline uintptr_t host_signal_pc(ucontext_t *uc) |
| 19 | { |
| 20 | return uc->uc_mcontext.mc_eip; |
| 21 | } |
| 22 | |
| 23 | static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc) |
| 24 | { |
| 25 | uc->uc_mcontext.mc_eip = pc; |
| 26 | } |
| 27 | |
| 28 | static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc) |
| 29 | { |
| 30 | /* |
| 31 | * Look in sys/i386/i386/trap.c. NOTE: mc_err == tr_err due to type punning |
| 32 | * between a trapframe and mcontext on FreeBSD/i386. |
| 33 | */ |
| 34 | return uc->uc_mcontext.mc_trapno == T_PAGEFLT && |
| 35 | uc->uc_mcontext.mc_err & PGEX_W; |
| 36 | } |
| 37 | |
| 38 | #endif |