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>
64 lines
1.5 KiB
C
64 lines
1.5 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 SPARC_HOST_SIGNAL_H
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#define SPARC_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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#ifdef __arch64__
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return uc->uc_mcontext.mc_gregs[MC_PC];
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#else
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return uc->uc_mcontext.gregs[REG_PC];
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#endif
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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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#ifdef __arch64__
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uc->uc_mcontext.mc_gregs[MC_PC] = pc;
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#else
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uc->uc_mcontext.gregs[REG_PC] = pc;
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#endif
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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 insn = *(uint32_t *)host_signal_pc(uc);
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if ((insn >> 30) == 3) {
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switch ((insn >> 19) & 0x3f) {
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case 0x05: /* stb */
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case 0x15: /* stba */
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case 0x06: /* sth */
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case 0x16: /* stha */
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case 0x04: /* st */
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case 0x14: /* sta */
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case 0x07: /* std */
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case 0x17: /* stda */
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case 0x0e: /* stx */
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case 0x1e: /* stxa */
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case 0x24: /* stf */
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case 0x34: /* stfa */
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case 0x27: /* stdf */
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case 0x37: /* stdfa */
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case 0x26: /* stqf */
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case 0x36: /* stqfa */
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case 0x25: /* stfsr */
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case 0x3c: /* casa */
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case 0x3e: /* casxa */
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return true;
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}
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}
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return false;
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}
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#endif
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