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| author | Ryan S. Arnold <rsa@us.ibm.com> | 2011-02-16 13:04:16 -0600 |
|---|---|---|
| committer | ryanarn <ryanarn@igoo.rchland.ibm.com> | 2011-02-16 13:04:16 -0600 |
| commit | 8130708fe5419b8bb17cfeb646678ac431ec797d (patch) | |
| tree | 0780557ce2ca45c7fd1781aceee4583c8a94b82c | |
| parent | c5413f82ce8cbe204536b76b57be2b4d35f0327a (diff) | |
| download | glibc-8130708fe5419b8bb17cfeb646678ac431ec797d.tar.gz glibc-8130708fe5419b8bb17cfeb646678ac431ec797d.tar.xz glibc-8130708fe5419b8bb17cfeb646678ac431ec797d.zip | |
Prevent VSX type TOC ref in _dl_start before relocs are resolved.
Disable VSX instruction usage in rtld.c with -mno-vsx so that, under -O3 optimization, a TOC reference isn't used for a zero constant in a VSX register prior to resolution of relocations.
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc64/power7/Makefile | 5 |
2 files changed, 12 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index 65c45fe168..1ba0ee51da 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,10 @@ +2011-02-16 Ryan S. Arnold <rsa@us.ibm.com> + + * sysdeps/powerpc/powerpc64/power7/Makefile: New file which adds + -mno-vsx to the CFLAGS-rtld.c variable to avoid using VSX registers and + insns in _dl_start to prevent a TOC reference before relocs are + resolved. + 2010-11-10 Luis Machado <luisgpm@br.ibm.com> * sysdeps/ieee754/ldbl-128ibm/e_sqrtl.c (__ieee754_sqrtl): Force diff --git a/sysdeps/powerpc/powerpc64/power7/Makefile b/sysdeps/powerpc/powerpc64/power7/Makefile new file mode 100644 index 0000000000..b0f45205b9 --- /dev/null +++ b/sysdeps/powerpc/powerpc64/power7/Makefile @@ -0,0 +1,5 @@ +ifeq ($(subdir),elf) +# Prevent the use of VSX registers and insns in _dl_start, which under -O3 +# optimization may require a TOC reference before relocations are resolved. +CFLAGS-rtld.c += -mno-vsx +endif |