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| author | Ryan S. Arnold <rsa@us.ibm.com> | 2011-02-15 09:50:09 -0600 |
|---|---|---|
| committer | ryanarn <ryanarn@igoo.rchland.ibm.com> | 2011-02-15 09:50:09 -0600 |
| commit | c3b77b811fc7106a4cc9d491c1cc9358fb266c42 (patch) | |
| tree | d294be8610f3e630d68a68683203352ce12c5b6a | |
| parent | 89972db69f823f89a5d5ea89ca1b98315701c6ab (diff) | |
| download | glibc-c3b77b811fc7106a4cc9d491c1cc9358fb266c42.tar glibc-c3b77b811fc7106a4cc9d491c1cc9358fb266c42.tar.gz glibc-c3b77b811fc7106a4cc9d491c1cc9358fb266c42.tar.bz2 glibc-c3b77b811fc7106a4cc9d491c1cc9358fb266c42.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 | 6 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc64/power7/Makefile | 6 |
2 files changed, 12 insertions, 0 deletions
@@ -1,3 +1,9 @@ +2011-02-14 Ryan S. Arnold <rsa@us.ibm.com> + + * sysdeps/powerpc/powerpc64/power7/Makefile (CFLAGS-rtld.c): Add + -mno-vsx to prevent GCC from using a VSX register and a TOC + reference before relocations are resolved under -O3 optimization. + 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..54b0fd9aee --- /dev/null +++ b/sysdeps/powerpc/powerpc64/power7/Makefile @@ -0,0 +1,6 @@ +ifeq ($(subdir),elf) +# Prevent the use of VSX instructions in _dl_start, which under -O3 optimization +# may require a TOC reference before relocations are resolved. +CFLAGS-rtld.c = -mno-vsx +endif + |