FreeChainXenon/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

i386-signal.h (MAKE_THROW_FRAME): Don't fix up frame pointer...

Browse source 
2001-05-29  Andrew Haley  <aph@redhat.com>

        * include/i386-signal.h (MAKE_THROW_FRAME): Don't fix up frame
        pointer: the dwarf unwinder in libgcc will do everything that's
        needed.
        (HANDLE_DIVIDE_OVERFLOW): Tidy.  Don't mess with stack frames any
        more than we absolutely need to.
        * configure.host (EXCEPTIONSPEC): Remove libgcj_sjlj on Alpha.
        * configure.in (SIGNAL_HANDLER): Use include/dwarf2-signal.h on
        Alpha.
        (SIGNAL_HANDLER): Test "$enable_sjlj_exceptions", not
        "$libgcj_sjlj".
        * configure: Rebuilt.
        * include/dwarf2-signal.h (MAKE_THROW_FRAME): Adjust PC
        for Alpha.
        (SIGNAL_HANDLER): Use siginfo style handler.
        (INIT_SEGV): Likewise.
        (INIT_FPE): Likewise.
        * include/ppc-signal.h: Delete whole file.

From-SVN: r42691
This commit is contained in:
Andrew Haley 2001-05-29 17:50:50 +00:00 • committed by Andrew Haley
parent 022dae817d
commit c9bffcd53e
6 changed files with 101 additions and 182 deletions
Download patch file Download diff file Expand all files Collapse all files

35
libjava/include/dwarf2-signal.h
View file

@ -4,9 +4,8 @@
This file is part of libgcj.
Use this file for every target for which the dwarf2 unwinder in
libgcc can unwind through signal handlers and no special actions
are needed.
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
@ -22,29 +21,43 @@ details. */
#undef HANDLE_FPE
#define SIGNAL_HANDLER(_name) \
static void _Jv_##_name (int)
static void _Jv_##_name (int, siginfo_t *, 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 need to
// do anything.
// 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)
#else
#define MAKE_THROW_FRAME(_exception) \
do \
{ \
(void)_p; \
} \
while (0)
#endif
#define INIT_SEGV \
do \
{ \
nullp = new java::lang::NullPointerException (); \
struct sigaction act; \
act.sa_handler = _Jv_catch_segv; \
act.sa_sigaction = _Jv_catch_segv; \
sigemptyset (&act.sa_mask); \
act.sa_flags = 0; \
act.sa_flags = SA_SIGINFO; \
syscall (SYS_sigaction, SIGSEGV, &act, NULL); \
} \
while (0)
@ -55,9 +68,9 @@ do \
arithexception = new java::lang::ArithmeticException \
(JvNewStringLatin1 ("/ by zero")); \
struct sigaction act; \
act.sa_handler = _Jv_catch_fpe; \
act.sa_sigaction = _Jv_catch_fpe; \
sigemptyset (&act.sa_mask); \
act.sa_flags = 0; \
act.sa_flags = SA_SIGINFO; \
syscall (SYS_sigaction, SIGFPE, &act, NULL); \
} \
while (0)