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cmd: linker changes for shared library initialization

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Suggested by iant@, this change:
  - looks for a symbol _rt0_<GOARCH>_<GOOS>_lib,
  - if the symbol is present, adds a new entry into the .init_array ELF
    section that points to the symbol.

The end-effect is that the symbol _rt0_<GOARCH>_<GOOS>_lib will be
invoked as soon as the (ELF) shared library is loaded, which will in turn
initialize the runtime. (To be implemented.)

Change-Id: I99911a180215a6df18f8a18483d12b9b497b48f4
Reviewed-on: https://go-review.googlesource.com/7692
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Srdjan Petrovic 2015-03-17 09:47:01 -07:00 • committed by Ian Lance Taylor
parent ff1f3a11e4
commit 8da54a4eec
3 changed files with 22 additions and 0 deletions
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1
src/cmd/internal/ld/lib.go
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@ -1362,6 +1362,7 @@ func genasmsym(put func(*LSym, string, int, int64, int64, int, *LSym)) {
SRODATA,
SSYMTAB,
SPCLNTAB,
SINITARR,
SDATA,
SNOPTRDATA,
SELFROSECT,