diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2015-03-26 18:07:04 +0530 |
|---|---|---|
| committer | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2015-03-27 00:08:47 +0100 |
| commit | d3c60fc490d714d7610a91555cec67952409b189 (patch) | |
| tree | 63e5909fa0054b6e8c362698d1ba4debfc320145 | |
| parent | 70bafe7e4d52f6dafbb5888009c9b601cdbc3743 (diff) | |
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.c | 3 |
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); } |