qemu

FORK: QEMU emulator
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host-signal.h (865B)

      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