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cmd/link: use -znocopyreloc when dynamic linking

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On ARM, use the gold linker to avoid copy relocations.
https://sourceware.org/bugzilla/show_bug.cgi?id=19962

Change-Id: Icf82a38d39495d4518812713b957a03a6652c728
Reviewed-on: https://go-review.googlesource.com/22141
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
David Crawshaw 2016-04-16 11:08:41 -04:00
parent 135572eb32
commit 3c8d6af8e0
1 changed files with 12 additions and 0 deletions
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12
src/cmd/link/internal/ld/lib.go
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@ -1117,6 +1117,18 @@ func hostlink() {
// because lazy PLT resolution can use large amounts of stack at // because lazy PLT resolution can use large amounts of stack at
// times we cannot allow it to do so. // times we cannot allow it to do so.
argv = append(argv, "-Wl,-znow") argv = append(argv, "-Wl,-znow")
// Do not let the host linker generate COPY relocations. These
// can move symbols out of sections that rely on stable offsets
// from the beginning of the section (like STYPE).
argv = append(argv, "-Wl,-znocopyreloc")
if SysArch.Family == sys.ARM {
// The GNU linker will generate COPY relocations on ARM
// even with -znocopyreloc set. Switch to gold.
// https://sourceware.org/bugzilla/show_bug.cgi?id=19962
argv = append(argv, "-fuse-ld=gold")
}
} }
if Iself && len(buildinfo) > 0 { if Iself && len(buildinfo) > 0 {