aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorGravatar Vineet Gupta <vgupta@synopsys.com>2015-03-26 18:07:04 +0530
committerGravatar Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>2015-03-27 00:08:47 +0100
commitd3c60fc490d714d7610a91555cec67952409b189 (patch)
tree63e5909fa0054b6e8c362698d1ba4debfc320145
parent70bafe7e4d52f6dafbb5888009c9b601cdbc3743 (diff)
downloaduClibc-d3c60fc490d714d7610a91555cec67952409b189.tar.gz
uClibc-d3c60fc490d714d7610a91555cec67952409b189.tar.bz2
ARC/signal: shield sa_restorer from compiler toggle side-effects
when building uClibc with -O0 (DODEBUG build) the default sigrestorer had some extra glue code generated for stack manipulation which was messing up resume from signal path. So annotate the function with -Os so that gcc would only generate the bare min 2 instruction TRAP sequence Reported-and-Debugged-by: Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
-rw-r--r--libc/sysdeps/linux/arc/sigaction.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/arc/sigaction.c b/libc/sysdeps/linux/arc/sigaction.c
index 4a4c9e2d0..67ca38aca 100644
--- a/libc/sysdeps/linux/arc/sigaction.c
+++ b/libc/sysdeps/linux/arc/sigaction.c
@@ -13,7 +13,8 @@
/*
* Default sigretrun stub if user doesn't specify SA_RESTORER
*/
-static void __default_rt_sa_restorer(void)
+static void attribute_optimize("Os") __attribute_noinline__
+__default_rt_sa_restorer(void)
{
INTERNAL_SYSCALL_NCS(__NR_rt_sigreturn, , 0);
}