mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-25 08:38:55 +08:00
7b20471292
2002-07-19 Bo Thorsen <bo@berlioz.suse.de>
* java/lang/ieeefp.h: Add x86-64 support.
* configure.in: Likewise.
* configure.host: Likewise.
* configure: Regenerated.
* sysdep/x86-64/locks.h: New file with x86-64 locks.
From-SVN: r55588
279 lines
8.9 KiB
C++
279 lines
8.9 KiB
C++
// dwarf2-signal.h - Catch runtime signals and turn them into exceptions.
|
|
|
|
/* Copyright (C) 2000, 2001 Free Software Foundation
|
|
|
|
This file is part of libgcj.
|
|
|
|
Use this file for a target for which the dwarf2 unwinder in libgcc
|
|
can unwind through signal handlers.
|
|
|
|
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>
|
|
|
|
#define HANDLE_SEGV 1
|
|
#undef HANDLE_FPE
|
|
|
|
#define SIGNAL_HANDLER(_name) \
|
|
static void _Jv_##_name (int, siginfo_t *_sip, void *_p)
|
|
|
|
class java::lang::Throwable;
|
|
|
|
// Unwind the stack to the point at which the signal was generated and
|
|
// then throw an exception. With the dwarf2 unwinder we don't usually
|
|
// need to do anything, with some minor exceptions.
|
|
|
|
#ifdef __alpha__
|
|
#define MAKE_THROW_FRAME(_exception) \
|
|
do \
|
|
{ \
|
|
/* Alpha either leaves PC pointing at a faulting instruction or the \
|
|
following instruction, depending on the signal. SEGV always does \
|
|
the former, so we adjust the saved PC to point to the following \
|
|
instruction; this is what the handler in libgcc expects. */ \
|
|
struct sigcontext *_sc = (struct sigcontext *)_p; \
|
|
_sc->sc_pc += 4; \
|
|
} \
|
|
while (0)
|
|
|
|
#elif defined(__ia64__)
|
|
|
|
#define MAKE_THROW_FRAME(_exception) \
|
|
do \
|
|
{ \
|
|
/* IA-64 either leaves PC pointing at a faulting instruction or the \
|
|
following instruction, depending on the signal. SEGV always does \
|
|
the former, so we adjust the saved PC to point to the following \
|
|
instruction; this is what the handler in libgcc expects. */ \
|
|
/* Note that we are lying to the unwinder here, which expects the \
|
|
faulting pc, not pc+1. But we claim the unwind information can't \
|
|
be changed by such a ld or st instruction, so it doesn't matter. */ \
|
|
struct sigcontext *_sc = (struct sigcontext *)_p; \
|
|
_sc->sc_ip++; \
|
|
} \
|
|
while (0)
|
|
#elif defined(__sparc__)
|
|
/* We could do the unwind of the signal frame quickly by hand here like
|
|
sparc-signal.h does under Solaris, but that makes debugging unwind
|
|
failures almost impossible. */
|
|
#if !defined(__arch64__)
|
|
#define MAKE_THROW_FRAME(_exception) \
|
|
do \
|
|
{ \
|
|
/* Sparc-32 leaves PC pointing at a faulting instruction \
|
|
always. \
|
|
We advance the PC one instruction past the exception causing PC. \
|
|
This is done because FDEs are found with "context->ra - 1" in the \
|
|
unwinder. \
|
|
Also, the dwarf2 unwind machinery is going to add 8 to the \
|
|
PC it uses on Sparc. So we adjust the PC here. We do it here \
|
|
because we run once for such an exception, however the Sparc specific\
|
|
unwind can run multiple times for the same exception and it would \
|
|
adjust the PC more than once resulting in a bogus value. */ \
|
|
struct sig_regs { \
|
|
unsigned int psr, pc, npc, y, u_regs[16]; \
|
|
} *regp; \
|
|
unsigned int insn; \
|
|
__asm__ __volatile__("ld [%%i7 + 8], %0" : "=r" (insn)); \
|
|
/* mov __NR_sigaction, %g1; Old signal stack layout */ \
|
|
if (insn == 0x821020d8) \
|
|
regp = (struct sig_regs *) _sip; \
|
|
else \
|
|
/* mov __NR_rt_sigaction, %g1; New signal stack layout */ \
|
|
regp = (struct sig_regs *) (_sip + 1); \
|
|
regp->pc = ((regp->pc + 4) - 8); \
|
|
} \
|
|
while (0)
|
|
#else
|
|
#define MAKE_THROW_FRAME(_exception) \
|
|
do \
|
|
{ \
|
|
/* Sparc-64 leaves PC pointing at a faulting instruction \
|
|
always. \
|
|
We advance the PC one instruction past the exception causing PC. \
|
|
This is done because FDEs are found with "context->ra - 1" in the \
|
|
unwinder. \
|
|
Also, the dwarf2 unwind machinery is going to add 8 to the \
|
|
PC it uses on Sparc. So we adjust the PC here. We do it here \
|
|
because we run once for such an exception, however the Sparc specific\
|
|
unwind can run multiple times for the same exception and it would \
|
|
adjust the PC more than once resulting in a bogus value. */ \
|
|
struct pt_regs { \
|
|
unsigned long u_regs[16]; \
|
|
unsigned long tstate, tpc, tnpc; \
|
|
unsigned int y, fprs; \
|
|
} *regp = (struct pt_regs *) (_sip + 1); \
|
|
regp->tpc = ((regp->tpc + 4) - 8); \
|
|
} \
|
|
while (0)
|
|
#endif
|
|
#else
|
|
#define MAKE_THROW_FRAME(_exception) \
|
|
do \
|
|
{ \
|
|
(void)_p; \
|
|
} \
|
|
while (0)
|
|
#endif
|
|
|
|
#if defined(__sparc__)
|
|
#if defined(__arch64__)
|
|
extern "C" {
|
|
static void __rt_sigreturn_stub(void)
|
|
{
|
|
__asm__("mov %0, %%g1\n\t"
|
|
"ta 0x6d\n\t"
|
|
: /* no outputs */
|
|
: "i" (__NR_rt_sigreturn));
|
|
}
|
|
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 INIT_SEGV \
|
|
do \
|
|
{ \
|
|
nullp = new java::lang::NullPointerException (); \
|
|
struct kernel_sigaction act; \
|
|
unsigned long stub = ((unsigned long)&__rt_sigreturn_stub); \
|
|
act.k_sa_sigaction = _Jv_catch_segv; \
|
|
sigemptyset (&act.k_sa_mask); \
|
|
act.k_sa_flags = SA_SIGINFO; \
|
|
act.k_sa_restorer = NULL; \
|
|
syscall (SYS_rt_sigaction, SIGSEGV, &act, NULL, \
|
|
stub - 8, _NSIG / 8); \
|
|
} \
|
|
while (0)
|
|
|
|
#define INIT_FPE \
|
|
do \
|
|
{ \
|
|
arithexception = new java::lang::ArithmeticException \
|
|
(JvNewStringLatin1 ("/ by zero")); \
|
|
struct kernel_sigaction act; \
|
|
unsigned long stub = ((unsigned long)&__rt_sigreturn_stub); \
|
|
act.k_sa_sigaction = _Jv_catch_fpe; \
|
|
sigemptyset (&act.k_sa_mask); \
|
|
act.k_sa_flags = SA_SIGINFO; \
|
|
act.k_sa_restorer = NULL; \
|
|
syscall (SYS_rt_sigaction, SIGFPE, &act, NULL, \
|
|
stub - 8, _NSIG / 8); \
|
|
} \
|
|
while (0)
|
|
#else /* __arch64__ */
|
|
|
|
extern "C" {
|
|
struct kernel_sigaction
|
|
{
|
|
void (*k_sa_sigaction)(int,siginfo_t *,void *);
|
|
unsigned long k_sa_mask, k_sa_flags;
|
|
void (*k_sa_restorer)(void);
|
|
};
|
|
}
|
|
|
|
#define INIT_SEGV \
|
|
do \
|
|
{ \
|
|
struct kernel_sigaction act; \
|
|
nullp = new java::lang::NullPointerException (); \
|
|
act.k_sa_sigaction = _Jv_catch_segv; \
|
|
act.k_sa_mask = 0; \
|
|
act.k_sa_flags = SA_SIGINFO; \
|
|
act.k_sa_restorer = NULL; \
|
|
syscall (SYS_sigaction, -SIGSEGV, &act, NULL); \
|
|
} \
|
|
while (0)
|
|
|
|
#define INIT_FPE \
|
|
do \
|
|
{ \
|
|
arithexception = new java::lang::ArithmeticException \
|
|
(JvNewStringLatin1 ("/ by zero")); \
|
|
struct kernel_sigaction act; \
|
|
act.k_sa_sigaction = _Jv_catch_fpe; \
|
|
act.k_sa_mask = 0; \
|
|
act.k_sa_flags = SA_SIGINFO; \
|
|
act.k_sa_restorer = NULL; \
|
|
syscall (SYS_sigaction, -SIGFPE, &act, NULL); \
|
|
} \
|
|
while (0)
|
|
#endif
|
|
#elif !defined(__ia64__)
|
|
#if defined(__x86_64__)
|
|
#define SYS_sigaction SYS_rt_sigaction
|
|
#endif
|
|
#define INIT_SEGV \
|
|
do \
|
|
{ \
|
|
nullp = new java::lang::NullPointerException (); \
|
|
struct sigaction act; \
|
|
act.sa_sigaction = _Jv_catch_segv; \
|
|
sigemptyset (&act.sa_mask); \
|
|
act.sa_flags = SA_SIGINFO; \
|
|
syscall (SYS_sigaction, SIGSEGV, &act, NULL); \
|
|
} \
|
|
while (0)
|
|
|
|
#define INIT_FPE \
|
|
do \
|
|
{ \
|
|
arithexception = new java::lang::ArithmeticException \
|
|
(JvNewStringLatin1 ("/ by zero")); \
|
|
struct sigaction act; \
|
|
act.sa_sigaction = _Jv_catch_fpe; \
|
|
sigemptyset (&act.sa_mask); \
|
|
act.sa_flags = SA_SIGINFO; \
|
|
syscall (SYS_sigaction, SIGFPE, &act, NULL); \
|
|
} \
|
|
while (0)
|
|
|
|
/* We use syscall(SYS_sigaction) in INIT_SEGV and INIT_FPE 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 once all systems have pthreads libraries that are
|
|
* compiled with full unwind info. */
|
|
|
|
#else /* __ia64__ */
|
|
|
|
// On IA64, unwind information is mandatory, so we can unwind
|
|
// correctly through glibc frames. Thus we call the ordinary
|
|
// sigaction.
|
|
|
|
#define INIT_SEGV \
|
|
do \
|
|
{ \
|
|
nullp = new java::lang::NullPointerException (); \
|
|
struct sigaction act; \
|
|
act.sa_sigaction = _Jv_catch_segv; \
|
|
sigemptyset (&act.sa_mask); \
|
|
act.sa_flags = SA_SIGINFO; \
|
|
sigaction (SIGSEGV, &act, NULL); \
|
|
} \
|
|
while (0)
|
|
|
|
#define INIT_FPE \
|
|
do \
|
|
{ \
|
|
arithexception = new java::lang::ArithmeticException \
|
|
(JvNewStringLatin1 ("/ by zero")); \
|
|
struct sigaction act; \
|
|
act.sa_sigaction = _Jv_catch_fpe; \
|
|
sigemptyset (&act.sa_mask); \
|
|
act.sa_flags = SA_SIGINFO; \
|
|
sigaction (SIGFPE, &act, NULL); \
|
|
} \
|
|
while (0)
|
|
#endif /* __ia64__ || __sparc__ */
|
|
#endif /* JAVA_SIGNAL_H */
|