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cmd/cgo: add AIX operating system

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This commit adds AIX operating system to cmd/cgo package for ppc64
architecture.

It doesn't fully adapt cgo tool to AIX. But it allows to use
go tool cgo -godefs which is really usefull for others packages.

Update: #25893

Change-Id: I38e289cf0122d143ba100986d08229b51b03ddfc
Reviewed-on: https://go-review.googlesource.com/c/138731
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 2018-09-28 17:15:49 +02:00 • committed by Ian Lance Taylor
parent 956af97880
commit ce4ef9addd
2 changed files with 95 additions and 2 deletions
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76
src/cmd/cgo/gcc.go
View file

@ -9,6 +9,7 @@ package main
import (
"bytes"
"cmd/internal/xcoff"
"debug/dwarf"
"debug/elf"
"debug/macho"
@ -1395,6 +1396,9 @@ func (p *Package) gccCmd() []string {
c = append(c, p.GccOptions...)
c = append(c, p.gccMachine()...)
if goos == "aix" {
c = append(c, "-maix64")
}
c = append(c, "-") //read input from standard input
return c
}
@ -1681,7 +1685,77 @@ func (p *Package) gccDebug(stdin []byte, nnames int) (d *dwarf.Data, ints []int6
return d, ints, floats, strs
}
fatalf("cannot parse gcc output %s as ELF, Mach-O, PE object", gccTmp())
if f, err := xcoff.Open(gccTmp()); err == nil {
defer f.Close()
d, err := f.DWARF()
if err != nil {
fatalf("cannot load DWARF output from %s: %v", gccTmp(), err)
}
bo := binary.BigEndian
for _, s := range f.Symbols {
switch {
case isDebugInts(s.Name):
if i := int(s.SectionNumber) - 1; 0 <= i && i < len(f.Sections) {
sect := f.Sections[i]
if s.Value < sect.Size {
if sdat, err := sect.Data(); err == nil {
data := sdat[s.Value:]
ints = make([]int64, len(data)/8)
for i := range ints {
ints[i] = int64(bo.Uint64(data[i*8:]))
}
}
}
}
case isDebugFloats(s.Name):
if i := int(s.SectionNumber) - 1; 0 <= i && i < len(f.Sections) {
sect := f.Sections[i]
if s.Value < sect.Size {
if sdat, err := sect.Data(); err == nil {
data := sdat[s.Value:]
floats = make([]float64, len(data)/8)
for i := range floats {
floats[i] = math.Float64frombits(bo.Uint64(data[i*8:]))
}
}
}
}
default:
if n := indexOfDebugStr(s.Name); n != -1 {
if i := int(s.SectionNumber) - 1; 0 <= i && i < len(f.Sections) {
sect := f.Sections[i]
if s.Value < sect.Size {
if sdat, err := sect.Data(); err == nil {
data := sdat[s.Value:]
strdata[n] = string(data)
}
}
}
break
}
if n := indexOfDebugStrlen(s.Name); n != -1 {
if i := int(s.SectionNumber) - 1; 0 <= i && i < len(f.Sections) {
sect := f.Sections[i]
if s.Value < sect.Size {
if sdat, err := sect.Data(); err == nil {
data := sdat[s.Value:]
strlen := bo.Uint64(data[:8])
if strlen > (1<<(uint(p.IntSize*8)-1) - 1) { // greater than MaxInt?
fatalf("string literal too big")
}
strlens[n] = int(strlen)
}
}
}
break
}
}
}
buildStrings()
return d, ints, floats, strs
}
fatalf("cannot parse gcc output %s as ELF, Mach-O, PE, XCOFF object", gccTmp())
panic("not reached")
}