qemu/bsd-user/host/x86_64/host-signal.h
Warner Losh b375158801 bsd-user/host/x86_64/host-signal.h: Implement host_signal_*
Implement host_signal_pc, host_signal_set_pc and host_signal_write for
x86_64.

Signed-off-by: Kyle Evans <kevans@freebsd.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2022-01-28 15:52:39 -07:00

38 lines
849 B
C

/*
* host-signal.h: signal info dependent on the host architecture
*
* Copyright (c) 2021 Warner Losh
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef X86_64_HOST_SIGNAL_H
#define X86_64_HOST_SIGNAL_H
#include <sys/ucontext.h>
#include <machine/trap.h>
#include <vm/pmap.h>
#include <machine/pmap.h>
static inline uintptr_t host_signal_pc(ucontext_t *uc)
{
return uc->uc_mcontext.mc_rip;
}
static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc)
{
uc->uc_mcontext.mc_rip = pc;
}
static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc)
{
/*
* Look in sys/amd64/amd64/trap.c. NOTE: mc_err == tr_err due to type
* punning between a trapframe and mcontext on FreeBSD/amd64.
*/
return uc->uc_mcontext.mc_trapno == T_PAGEFLT &&
uc->uc_mcontext.mc_err & PGEX_W;
}
#endif