220f8606c8
Implement host_signal_pc, host_signal_set_pc and host_signal_write for i386. 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>
38 lines
842 B
C
38 lines
842 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 I386_HOST_SIGNAL_H
|
|
#define I386_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_eip;
|
|
}
|
|
|
|
static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc)
|
|
{
|
|
uc->uc_mcontext.mc_eip = pc;
|
|
}
|
|
|
|
static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc)
|
|
{
|
|
/*
|
|
* Look in sys/i386/i386/trap.c. NOTE: mc_err == tr_err due to type punning
|
|
* between a trapframe and mcontext on FreeBSD/i386.
|
|
*/
|
|
return uc->uc_mcontext.mc_trapno == T_PAGEFLT &&
|
|
uc->uc_mcontext.mc_err & PGEX_W;
|
|
}
|
|
|
|
#endif
|