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linux.h (MD_FALLBACK_FRAME_STATE_FOR): For SIGSEGV and SIGBUS signal frames...

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ChangeLog:

	* config/s390/linux.h (MD_FALLBACK_FRAME_STATE_FOR): For SIGSEGV and
	SIGBUS signal frames, the PSW address points *to* the faulting
	instruction, not after it.

libjava/ChangeLog:

	* include/s390-signal.c (SIGNAL_HANDLER): Use SIGINFO-style prototype.
	(struct old_s390_kernel_sigaction): Likewise for k_sa_handler.
	(MAKE_THROW_FRAME): Do not modify PSW address.
	(INIT_SEGV): Install SIGINFO-style signal handler.
	(INIT_FPE): Likewise.

From-SVN: r84506
This commit is contained in:
Ulrich Weigand 2004-07-11 11:49:25 +00:00 • committed by Ulrich Weigand
parent e5dce82f98
commit bbb362e693
4 changed files with 50 additions and 14 deletions
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21
libjava/include/s390-signal.h
View file

@ -20,18 +20,11 @@ details. */
#undef HANDLE_FPE
#define SIGNAL_HANDLER(_name) \
static void _name (int /* _signal */, struct sigcontext _sc)
static void _name (int, siginfo_t *, void *)
#define MAKE_THROW_FRAME(_exception) \
do \
{ \
/* Advance the program counter so that it is after the start of the \
instruction: the s390 exception handler expects the PSW to point \
to the instruction after a call. */ \
_sc.sregs->regs.psw.addr += 2; \
\
} \
while (0)
/* We no longer need to fiddle with the PSW address in the signal handler;
this is now all handled correctly in MD_FALLBACK_FRAME_STATE_FOR. */
#define MAKE_THROW_FRAME(_exception)
/* For an explanation why we cannot simply use sigaction to
@ -43,7 +36,7 @@ while (0)
visible to us in a header file so we define it here. */
struct old_s390_kernel_sigaction {
void (*k_sa_handler) (int, struct sigcontext);
void (*k_sa_handler) (int, siginfo_t *, void *);
unsigned long k_sa_mask;
unsigned long k_sa_flags;
void (*sa_restorer) (void);
@ -55,7 +48,7 @@ do \
struct old_s390_kernel_sigaction kact; \
kact.k_sa_handler = catch_segv; \
kact.k_sa_mask = 0; \
kact.k_sa_flags = 0; \
kact.k_sa_flags = SA_SIGINFO; \
syscall (SYS_sigaction, SIGSEGV, &kact, NULL); \
} \
while (0)
@ -66,7 +59,7 @@ do \
struct old_s390_kernel_sigaction kact; \
kact.k_sa_handler = catch_fpe; \
kact.k_sa_mask = 0; \
kact.k_sa_flags = 0; \
kact.k_sa_flags = SA_SIGINFO; \
syscall (SYS_sigaction, SIGFPE, &kact, NULL); \
} \
while (0)