bsd-user/host/x86_64/host-signal.h

   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 X86_64_HOST_SIGNAL_H
  10 #define X86_64_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_rip;
  21 }
  22
  23 static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc)
  24 {
  25     uc->uc_mcontext.mc_rip = pc;
  26 }
  27
  28 static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc)
  29 {
  30     /*
  31      * Look in sys/amd64/amd64/trap.c. NOTE: mc_err == tr_err due to type
  32      * punning between a trapframe and mcontext on FreeBSD/amd64.
  33      */
  34     return uc->uc_mcontext.mc_trapno == T_PAGEFLT &&
  35         uc->uc_mcontext.mc_err & PGEX_W;
  36 }
  37
  38 #endif