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cmd/internal/ld: support for -buildmode=shared

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Change-Id: Id4997d611ced29397133f14def6abc88aa9e811e
Reviewed-on: https://go-review.googlesource.com/8252
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Michael Hudson-Doyle 2015-03-30 02:59:10 +00:00 • committed by Ian Lance Taylor
parent 6f6512bd60
commit 00bc19e996
11 changed files with 153 additions and 61 deletions
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19
src/cmd/internal/ld/data.go
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@ -333,8 +333,14 @@ func relocsym(s *LSym) {
}
if r.Sym != nil && (r.Sym.Type&(SMASK|SHIDDEN) == 0 || r.Sym.Type&SMASK == SXREF) {
Diag("%s: not defined", r.Sym.Name)
continue
// When putting the runtime but not main into a shared library
// these symbols are undefined and that's OK.
if Buildmode == BuildmodeShared && (r.Sym.Name == "main.main" || r.Sym.Name == "main.init") {
r.Sym.Type = SDYNIMPORT
} else {
Diag("%s: not defined", r.Sym.Name)
continue
}
}
if r.Type >= 256 {
@ -344,8 +350,9 @@ func relocsym(s *LSym) {
continue
}
// Solaris needs the ability to reference dynimport symbols.
if HEADTYPE != Hsolaris && r.Sym != nil && r.Sym.Type == SDYNIMPORT {
// We need to be able to reference dynimport symbols when linking against
// shared libraries, and Solaris needs it always
if HEADTYPE != Hsolaris && r.Sym != nil && r.Sym.Type == SDYNIMPORT && !DynlinkingGo() {
Diag("unhandled relocation for %s (type %d rtype %d)", r.Sym.Name, r.Sym.Type, r.Type)
}
if r.Sym != nil && r.Sym.Type != STLSBSS && !r.Sym.Reachable {
@ -1322,7 +1329,7 @@ func dodata() {
sect.Length = uint64(datsize) - sect.Vaddr
/* shared library initializer */
if Buildmode == BuildmodeCShared {
if Buildmode == BuildmodeCShared || DynlinkingGo() {
sect := addsection(&Segdata, ".init_array", 06)
sect.Align = maxalign(s, SINITARR)
datsize = Rnd(datsize, int64(sect.Align))
@ -1728,10 +1735,12 @@ func address() {
xdefine("runtime.etypelink", SRODATA, int64(typelink.Vaddr+typelink.Length))
sym := Linklookup(Ctxt, "runtime.gcdata", 0)
sym.Local = true
xdefine("runtime.egcdata", SRODATA, Symaddr(sym)+sym.Size)
Linklookup(Ctxt, "runtime.egcdata", 0).Sect = sym.Sect
sym = Linklookup(Ctxt, "runtime.gcbss", 0)
sym.Local = true
xdefine("runtime.egcbss", SRODATA, Symaddr(sym)+sym.Size)
Linklookup(Ctxt, "runtime.egcbss", 0).Sect = sym.Sect