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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
/*
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* host-signal.h: signal info dependent on the host architecture
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*
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* Copyright (c) 2021 Warner Losh
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef I386_HOST_SIGNAL_H
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#define I386_HOST_SIGNAL_H
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#include <sys/ucontext.h>
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#include <machine/trap.h>
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#include <vm/pmap.h>
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#include <machine/pmap.h>
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static inline uintptr_t host_signal_pc(ucontext_t *uc)
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{
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return uc->uc_mcontext.mc_eip;
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}
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static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc)
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{
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uc->uc_mcontext.mc_eip = pc;
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}
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static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc)
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{
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/*
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* Look in sys/i386/i386/trap.c. NOTE: mc_err == tr_err due to type punning
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* between a trapframe and mcontext on FreeBSD/i386.
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*/
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return uc->uc_mcontext.mc_trapno == T_PAGEFLT &&
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uc->uc_mcontext.mc_err & PGEX_W;
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}
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#endif
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