Port-arm archive
[
Date Prev][
Date Next][
Thread Prev][
Thread Next][
Date Index][
Thread Index][
Old Index]
PIE binary broken on arm due to optimization error for crt0-common.c
On arm, segmentation faults occur in termination of PIE binaries:
% uname -mpr
7.99.30 evbarm earmv7hfeb
% gcc -fPIE -pie hello.c
% ./a.out
Hello, World!
zsh: segmentation fault ./a.out
This problem arose after the -O1 hack for lib/csu was removed.
I found that if crt0-common.c is compiled with -O1, segmentation
faults do not take place. Please apply the attached patch as a
workaround.
Thanks,
Rin
--- src/lib/csu/common/Makefile.inc.orig 2016年06月04日 11:51:12.497822816 +0900
+++ src/lib/csu/common/Makefile.inc 2016年06月04日 12:09:39.003486943 +0900
@@ -33,6 +33,11 @@
OBJS += sparc_mcmedlow.o sparc_mcmedmid.o sparc_mcmedany.o
.endif
+.if !empty(MACHINE_ARCH:Mearm*) && defined(HAVE_GCC) && ${HAVE_GCC} == 53
+# XXX: GCC5 miscompiles crt0-common.c, which lesds PIEs into SEGV.
+CFLAGS.crt0-common.c+= -O1
+.endif
+
realall: ${OBJS}
.if exists(${ARCHDIR}/crtbegin.S)
Home |
Main Index |
Thread Index |
Old Index