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authorRich Felker <dalias@aerifal.cx>2017-03-08 13:35:33 -0500
committerRich Felker <dalias@aerifal.cx>2017-03-08 13:35:33 -0500
commitfc85fb38605a8bf341c367b8ab0d36edab2bdbfc (patch)
tree310e34035a2503bf790606949ea1f9279eed35e5 /arch
parent827c4e6fbe46142049ef3d8bcb8f35951712797d (diff)
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fix ld-behavior-dependent crash in ppc64 ldso startup
the 32-bit pc-relative address for stage 2 of dynamic linker entry was wrongly loaded with a zero-extending load instead of sign-extending load, resulting in an invalid jump if the offset happened to be negative, which depends on the linker's ordering of text sections.
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc64/reloc.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc64/reloc.h b/arch/powerpc64/reloc.h
index e1bad009..faf70acd 100644
--- a/arch/powerpc64/reloc.h
+++ b/arch/powerpc64/reloc.h
@@ -27,6 +27,6 @@
" bl 1f \n" \
" .long " #sym "-. \n" \
"1: mflr %1 \n" \
- " lwz %0, 0(%1) \n" \
+ " lwa %0, 0(%1) \n" \
" add %0, %0, %1 \n" \
: "=r"(*(fp)), "=r"((long){0}) : : "memory", "lr" )