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bsd-user/host/x86_64/host-signal.h: Implement host_signal_*

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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>
This commit is contained in:
Warner Losh 2022-01-08 17:15:57 -07:00
parent 220f8606c8
commit b375158801
1 changed files with 37 additions and 0 deletions
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37
bsd-user/host/x86_64/host-signal.h Normal file
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/*
* 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