754e45a867
PR other/26208 * unwind-dw2.c (struct _Unwind_Context): Add signal_frame field. (extract_cie_info): Handle S flag in augmentation string. (execute_cfa_program): If context->signal_frame, execute also fs->pc == context->ra instructions. (uw_frame_state_for): If context->signal_frame, don't subtract one from context->ra to find FDE. (uw_update_context_1): Set context->signal_frame to fs->signal_frame. (_Unwind_GetIPInfo): New function. * unwind-dw2.h (_Unwind_FrameState): Add signal_frame field. * unwind-c.c (PERSONALITY_FUNCTION): Use _Unwind_GetIPInfo instead of _Unwind_GetIP. * unwind-sjlj.c (_Unwind_GetIPInfo): New function. * unwind-generic.h (_Unwind_GetIPInfo): New prototype. * unwind-compat.c (_Unwind_GetIPInfo): New function. * libgcc-std.ver (_Unwind_GetIPInfo): Export @@GCC_4.2.0. * config/ia64/unwind-ia64.c (_Unwind_GetIPInfo): New function. * config/arm/unwind-arm.h (_Unwind_GetIPInfo): Define. * config/i386/linux-unwind.h (x86_fallback_frame_state, x86_64_fallback_frame_state): Set fs->signal_frame. * config/rs6000/linux-unwind.h (ppc_fallback_frame_state): Likewise. (MD_FROB_UPDATE_CONTEXT): Define unconditionally. (frob_update_context): Likewise. Workaround missing S flag in Linux 2.6.12 - 2.6.16 kernel vDSOs. * config/s390/linux-unwind.h (s390_fallback_frame_state): Likewise. Remove the psw_addr + 1 hack. libjava/ * exception.cc (PERSONALITY_FUNCTION): Use _Unwind_GetIPInfo instead of _Unwind_GetIP. * include/i386-signal.h (MAKE_THROW_FRAME): Change into empty macro. (HANDLE_DIVIDE_OVERFLOW): Don't adjust _res->eip if falling through to throw. * include/x86_64-signal.h (MAKE_THROW_FRAME): Change into empty macro. * include/powerpc-signal.h (MAKE_THROW_FRAME): Change into empty macro. libstdc++-v3/ * libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Use _Unwind_GetIPInfo instead of _Unwind_GetIP. From-SVN: r111488
85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
// x86_64-signal.h - Catch runtime signals and turn them into exceptions
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// on an x86_64 based GNU/Linux system.
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/* Copyright (C) 2003, 2006 Free Software Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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#ifdef __x86_64__
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#ifndef JAVA_SIGNAL_H
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#define JAVA_SIGNAL_H 1
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#include <signal.h>
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#include <sys/syscall.h>
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#define HANDLE_SEGV 1
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#define SIGNAL_HANDLER(_name) \
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static void _Jv_##_name (int, siginfo_t *, void *_p)
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extern "C"
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{
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struct kernel_sigaction
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{
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void (*k_sa_sigaction)(int,siginfo_t *,void *);
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unsigned long k_sa_flags;
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void (*k_sa_restorer) (void);
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sigset_t k_sa_mask;
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};
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}
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#define MAKE_THROW_FRAME(_exception)
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#define RESTORE(name, syscall) RESTORE2 (name, syscall)
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#define RESTORE2(name, syscall) \
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asm \
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( \
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".text\n" \
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".byte 0 # Yes, this really is necessary\n" \
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".align 16\n" \
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"__" #name ":\n" \
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" movq $" #syscall ", %rax\n" \
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" syscall\n" \
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);
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/* The return code for realtime-signals. */
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RESTORE (restore_rt, __NR_rt_sigreturn)
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void restore_rt (void) asm ("__restore_rt")
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__attribute__ ((visibility ("hidden")));
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#define INIT_SEGV \
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do \
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{ \
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struct kernel_sigaction act; \
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act.k_sa_sigaction = _Jv_catch_segv; \
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sigemptyset (&act.k_sa_mask); \
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act.k_sa_flags = SA_SIGINFO|0x4000000; \
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act.k_sa_restorer = restore_rt; \
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syscall (SYS_rt_sigaction, SIGSEGV, &act, NULL, _NSIG / 8); \
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} \
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while (0)
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/* We use syscall(SYS_rt_sigaction) in INIT_SEGV instead of
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* sigaction() because on some systems the pthreads wrappers for
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* signal handlers are not compiled with unwind information, so it's
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* not possible to unwind through them. This is a problem that will
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* go away if all systems ever have pthreads libraries that are
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* compiled with unwind info. */
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#endif /* JAVA_SIGNAL_H */
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#else /* __x86_64__ */
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/* This is for the 32-bit subsystem on x86-64. */
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#define sigcontext_struct sigcontext
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#include <java-signal-aux.h>
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#endif /* __x86_64__ */
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