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cmd/link,runtime/cgo: enable PT_TLS generation on OpenBSD

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OpenBSD 6.0 and later have support for PT_TLS in ld.so(1). Now that OpenBSD
6.1 has been released, OpenBSD 5.9 is no longer officially supported and Go
can start generating PT_TLS for OpenBSD cgo binaries. This also allows us
to remove the workarounds in the OpenBSD cgo runtime.

This change also removes the environ and progname exports - these are now
provided directly by ld.so(1) itself.

Fixes #19932

Change-Id: I42e75ef9feb5dcd4696add5233497e3cbc48ad52
Reviewed-on: https://go-review.googlesource.com/40331
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Joel Sing 2017-04-12 01:10:01 +10:00
parent 2122fc6358
commit 9417c022c6
8 changed files with 25 additions and 380 deletions
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2
src/cmd/link/internal/ld/lib.go
View file

@ -1971,7 +1971,7 @@ func genasmsym(ctxt *Link, put func(*Link, *Symbol, string, SymbolType, int64, *
put(ctxt, s, s.Extname, UndefinedSym, 0, nil)
case obj.STLSBSS:
if Linkmode == LinkExternal && Headtype != obj.Hopenbsd {
if Linkmode == LinkExternal {
put(ctxt, s, s.Name, TLSSym, Symaddr(s), s.Gotype)
}
}