commit 1ad955bf2c0a772599f46d2247f06d89508b6d76 Author: Mike Hommey mh+mozilla@glandium.org Date: Tue Jan 19 14:31:04 2016 +0900

Bug 1233963 - Work around recent GNU gold behavior with segments starting before the first section they contain --- build/unix/elfhack/elf.cpp | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/build/unix/elfhack/elf.cpp b/build/unix/elfhack/elf.cpp index 666b535..743afde 100644 --- a/build/unix/elfhack/elf.cpp +++ b/build/unix/elfhack/elf.cpp @@ -258,7 +258,10 @@ Elf::Elf(std::ifstream &file) segment->addSection(sections[j]); // Make sure that our view of segments corresponds to the original // ELF file. - assert(segment->getFileSize() == phdr.p_filesz); + // GNU gold likes to start some segments before the first section + // they contain. https://sourceware.org/bugzilla/show_bug.cgi?id=19392 + unsigned int gold_adjustment = segment->getAddr() - phdr.p_vaddr; + assert(segment->getFileSize() == phdr.p_filesz - gold_adjustment); // gold makes TLS segments end on an aligned virtual address, even // when the underlying section ends before that, while bfd ld // doesn't. It's fine if we don't keep that alignment. @@ -267,7 +270,7 @@ Elf::Elf(std::ifstream &file) unsigned int align = segment->getAlign(); memsize = (memsize + align - 1) & ~(align - 1); } - assert(memsize == phdr.p_memsz); + assert(memsize == phdr.p_memsz - gold_adjustment); segments.push_back(segment); }