c6cda6a44a
Add a new function host_signal_set_pc to set the next pc in an mcontext. The caller should ensure this is a valid PC for execution. Acked-by: Laurent Vivier <laurent@vivier.eu> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20211113045603.60391-2-imp@bsdimp.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
48 lines
1.1 KiB
C
48 lines
1.1 KiB
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) 2003-2005 Fabrice Bellard
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* Copyright (c) 2021 Linaro Limited
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*
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* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef ALPHA_HOST_SIGNAL_H
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#define ALPHA_HOST_SIGNAL_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.sc_pc;
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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.sc_pc = 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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uint32_t *pc = (uint32_t *)host_signal_pc(uc);
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uint32_t insn = *pc;
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/* XXX: need kernel patch to get write flag faster */
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switch (insn >> 26) {
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case 0x0d: /* stw */
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case 0x0e: /* stb */
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case 0x0f: /* stq_u */
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case 0x24: /* stf */
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case 0x25: /* stg */
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case 0x26: /* sts */
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case 0x27: /* stt */
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case 0x2c: /* stl */
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case 0x2d: /* stq */
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case 0x2e: /* stl_c */
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case 0x2f: /* stq_c */
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return true;
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}
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return false;
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}
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#endif
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