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cmd/link, runtime: allow external linking for aix/ppc64

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This commit adds external linking in cmd/link for aix/ppc64.
As relocations on .text data aren't possible on AIX, Segrelrodata is
used to move all these datas to .data section.

Change-Id: I4d1361c1fc9290e11e6f5560864460c76551dbeb
Reviewed-on: https://go-review.googlesource.com/c/go/+/164003
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Clément Chigot 2019-02-20 16:16:38 +01:00 • committed by Ian Lance Taylor
parent 0ff0df8be3
commit 80f10965ee
9 changed files with 297 additions and 24 deletions
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19
src/cmd/link/internal/ld/lib.go
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@ -133,6 +133,7 @@ type Arch struct {
Gentext func(*Link)
Machoreloc1 func(*sys.Arch, *OutBuf, *sym.Symbol, *sym.Reloc, int64) bool
PEreloc1 func(*sys.Arch, *OutBuf, *sym.Symbol, *sym.Reloc, int64) bool
Xcoffreloc1 func(*sys.Arch, *OutBuf, *sym.Symbol, *sym.Reloc, int64) bool
// TLSIEtoLE converts a TLS Initial Executable relocation to
// a TLS Local Executable relocation.
@ -179,7 +180,7 @@ func (ctxt *Link) UseRelro() bool {
case BuildModeCArchive, BuildModeCShared, BuildModeShared, BuildModePIE, BuildModePlugin:
return ctxt.IsELF
default:
return ctxt.linkShared
return ctxt.linkShared || (ctxt.HeadType == objabi.Haix && ctxt.LinkMode == LinkExternal)
}
}
@ -405,7 +406,7 @@ func (ctxt *Link) loadlib() {
*FlagTextAddr = 0
}
if ctxt.LinkMode == LinkExternal && ctxt.Arch.Family == sys.PPC64 {
if ctxt.LinkMode == LinkExternal && ctxt.Arch.Family == sys.PPC64 && objabi.GOOS != "aix" {
toc := ctxt.Syms.Lookup(".TOC.", 0)
toc.Type = sym.SDYNIMPORT
}
@ -1145,6 +1146,11 @@ func (ctxt *Link) hostlink() {
} else {
argv = append(argv, "-mconsole")
}
case objabi.Haix:
argv = append(argv, "-pthread")
// prevent ld to reorder .text functions to keep the same
// first/last functions for moduledata.
argv = append(argv, "-Wl,-bnoobjreorder")
}
switch ctxt.BuildMode {
@ -1493,7 +1499,7 @@ func hostlinkArchArgs(arch *sys.Arch) []string {
switch arch.Family {
case sys.I386:
return []string{"-m32"}
case sys.AMD64, sys.PPC64, sys.S390X:
case sys.AMD64, sys.S390X:
return []string{"-m64"}
case sys.ARM:
return []string{"-marm"}
@ -1503,6 +1509,13 @@ func hostlinkArchArgs(arch *sys.Arch) []string {
return []string{"-mabi=64"}
case sys.MIPS:
return []string{"-mabi=32"}
case sys.PPC64:
if objabi.GOOS == "aix" {
return []string{"-maix64"}
} else {
return []string{"-m64"}
}
}
return nil
}