mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-24 06:38:52 +08:00
bec3e66d1a
2003-06-12 Andrew Haley <aph@redhat.com>
* prims.cc (catch_segv): Create exception in handler.
(catch_fpe): Likewise.
(_Jv_divI, _Jv_remI, _Jv_divJ, _Jv_remJ): Likewise.
(_Jv_ThrowSignal): Remove.
* include/x86_64-signal.h (INIT_SEGV): Delete reference to nullp.
* include/default-signal.h (INIT_SEGV, INIT_FPE): Delete reference
to nullp and arithexception.
* include/dwarf2-signal.h (INIT_SEGV, INIT_FPE): Likewise.
* include/i386-signal.h (INIT_SEGV, INIT_FPE): Likewise.
* include/s390-signal.h (INIT_SEGV, INIT_FPE): Likewise.
* include/sparc-signal.h (INIT_SEGV, INIT_FPE): Likewise.
* include/win32-signal.h (INIT_SEGV, INIT_FPE): Likewise.
From-SVN: r67892
96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
// x86_64-signal.h - Catch runtime signals and turn them into exceptions
|
|
// on an x86_64 based GNU/Linux system.
|
|
|
|
/* Copyright (C) 2003 Free Software Foundation
|
|
|
|
This file is part of libgcj.
|
|
|
|
This software is copyrighted work licensed under the terms of the
|
|
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
|
|
details. */
|
|
|
|
|
|
#ifndef JAVA_SIGNAL_H
|
|
#define JAVA_SIGNAL_H 1
|
|
|
|
#include <signal.h>
|
|
#include <sys/syscall.h>
|
|
|
|
#ifdef __x86_64__
|
|
|
|
#define HANDLE_SEGV 1
|
|
|
|
#define SIGNAL_HANDLER(_name) \
|
|
static void _Jv_##_name (int, siginfo_t *, void *_p)
|
|
|
|
extern "C"
|
|
{
|
|
struct kernel_sigaction
|
|
{
|
|
void (*k_sa_sigaction)(int,siginfo_t *,void *);
|
|
unsigned long k_sa_flags;
|
|
void (*k_sa_restorer) (void);
|
|
sigset_t k_sa_mask;
|
|
};
|
|
}
|
|
|
|
#define MAKE_THROW_FRAME(_exception) \
|
|
do \
|
|
{ \
|
|
/* Advance the program counter so that it is after the start of the \
|
|
instruction: the x86_64 exception handler expects \
|
|
the PC to point to the instruction after a call. */ \
|
|
struct ucontext *_uc = (struct ucontext *)_p; \
|
|
volatile struct sigcontext *_sc = (struct sigcontext *) &_uc->uc_mcontext; \
|
|
_sc->rip += 2; \
|
|
} \
|
|
while (0)
|
|
|
|
#define RESTORE(name, syscall) RESTORE2 (name, syscall)
|
|
#define RESTORE2(name, syscall) \
|
|
asm \
|
|
( \
|
|
".byte 0 # Yes, this really is necessary\n" \
|
|
".align 16\n" \
|
|
"__" #name ":\n" \
|
|
" movq $" #syscall ", %rax\n" \
|
|
" syscall\n" \
|
|
);
|
|
|
|
/* The return code for realtime-signals. */
|
|
RESTORE (restore_rt, __NR_rt_sigreturn)
|
|
static void restore_rt (void) asm ("__restore_rt");
|
|
|
|
#define INIT_SEGV \
|
|
do \
|
|
{ \
|
|
struct kernel_sigaction act; \
|
|
act.k_sa_sigaction = _Jv_catch_segv; \
|
|
sigemptyset (&act.k_sa_mask); \
|
|
act.k_sa_flags = SA_SIGINFO|0x4000000; \
|
|
act.k_sa_restorer = restore_rt; \
|
|
syscall (SYS_rt_sigaction, SIGSEGV, &act, NULL, _NSIG / 8); \
|
|
} \
|
|
while (0)
|
|
|
|
/* We use syscall(SYS_rt_sigaction) in INIT_SEGV instead of
|
|
* sigaction() because on some systems the pthreads wrappers for
|
|
* signal handlers are not compiled with unwind information, so it's
|
|
* not possible to unwind through them. This is a problem that will
|
|
* go away if all systems ever have pthreads libraries that are
|
|
* compiled with unwind info. */
|
|
|
|
#else /* __x86_64__ */
|
|
|
|
/* This is for the 32-bit subsystem on on x86-64. Catching signals
|
|
doesn't yet work on that target. */
|
|
|
|
#undef HANDLE_SEGV
|
|
#undef HANDLE_FPE
|
|
|
|
#define INIT_SEGV do {} while (0)
|
|
#define INIT_FPE do {} while (0)
|
|
|
|
#endif /* __x86_64__ */
|
|
#endif /* JAVA_SIGNAL_H */
|