From fc85fb38605a8bf341c367b8ab0d36edab2bdbfc Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Wed, 8 Mar 2017 13:35:33 -0500 Subject: [PATCH] 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. --- arch/powerpc64/reloc.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) 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" ) -- GitLab