From 68e58c33468f3523c1eb6232d0a4d1e949db3011 Mon Sep 17 00:00:00 2001
From: Geoffrey Keating <geoffk@apple.com>
Date: Mon, 5 Dec 2005 19:37:11 +0000
Subject: [PATCH] host-darwin.c (segv_handler): Unblock SEGV so we don't go
into an infinite loop.
* config/rs6000/host-darwin.c (segv_handler): Unblock SEGV so
we don't go into an infinite loop.
From-SVN: r108070
---
gcc/ChangeLog | 5 +++++
gcc/config/rs6000/host-darwin.c | 4 ++++
2 files changed, 9 insertions(+)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d443ba6a9894..57153ed8e4ba 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2005-12-05 Geoffrey Keating <geoffk@apple.com>
+
+ * config/rs6000/host-darwin.c (segv_handler): Unblock SEGV so
+ we don't go into an infinite loop.
+
2005-12-05 Paolo Bonzini <bonzini@gnu.org>
* config/rs6000/predicates.md (logical_const_operand): Split
diff --git a/gcc/config/rs6000/host-darwin.c b/gcc/config/rs6000/host-darwin.c
index 694d0a1dcd10..75c92a2a25bd 100644
--- a/gcc/config/rs6000/host-darwin.c
+++ b/gcc/config/rs6000/host-darwin.c
@@ -58,11 +58,15 @@ segv_handler (int sig ATTRIBUTE_UNUSED,
void *scp)
{
ucontext_t *uc = (ucontext_t *)scp;
+ sigset_t sigset;
unsigned faulting_insn;
/* The fault might have happened when trying to run some instruction, in
which case the next line will segfault _again_. Handle this case. */
signal (SIGSEGV, segv_crash_handler);
+ sigemptyset (&sigset);
+ sigaddset (&sigset, SIGSEGV);
+ sigprocmask (SIG_UNBLOCK, &sigset, NULL);
faulting_insn = *(unsigned *)uc->uc_mcontext->ss.srr0;
--
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