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[ELF] Fix TP offset of TLS Variant I after D62059

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As Ryan Prichard pointed out, after D62059, the TP offset is incorrect.

Add x86-64-tls-le-align.s to check this.  Better formulae for both
variants should take p_vaddr%p_align into account (offset%p_align =
p_vaddr%p_align is a basic ELF requirement), but I can't find a way to
test the behavior.

llvm-svn: 361084
This commit is contained in:
Fangrui Song 2019-05-18 00:43:10 +00:00
parent f9399de525
commit 348731aeed
1 changed files with 1 additions and 1 deletions
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2
lld/ELF/InputSection.cpp
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@ -598,7 +598,7 @@ static int64_t getTlsTpOffset() {
case EM_386:
case EM_X86_64:
// Variant 2. The TLS segment is located just before the thread pointer.
return -Out::TlsPhdr->p_memsz;
return -alignTo(Out::TlsPhdr->p_memsz, Out::TlsPhdr->p_align);
case EM_PPC64:
// The thread pointer points to a fixed offset from the start of the
// executable's TLS segment. An offset of 0x7000 allows a signed 16-bit