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cmd/link: move ELF reader to its own package

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Along the way, switch to using relocation constants from debug/elf.

For #22095

Change-Id: I1a64353619f95dde5aa39060c4b9d001af7dc1e4
Reviewed-on: https://go-review.googlesource.com/69013
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
David Crawshaw 2017-10-06 16:01:02 -04:00
parent 70576947fd
commit ecfa7375e4
13 changed files with 347 additions and 767 deletions
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10
src/cmd/link/internal/ld/lib.go
View file

@ -36,6 +36,7 @@ import (
"cmd/internal/bio"
"cmd/internal/objabi"
"cmd/internal/sys"
"cmd/link/internal/loadelf"
"cmd/link/internal/loadmacho"
"cmd/link/internal/objfile"
"cmd/link/internal/sym"
@ -1384,6 +1385,15 @@ func ldobj(ctxt *Link, f *bio.Reader, lib *sym.Library, length int64, pn string,
magic := uint32(c1)<<24 | uint32(c2)<<16 | uint32(c3)<<8 | uint32(c4)
if magic == 0x7f454c46 { // \x7F E L F
ldelf := func(ctxt *Link, f *bio.Reader, pkg string, length int64, pn string) {
textp, flags, err := loadelf.Load(ctxt.Arch, ctxt.Syms, f, pkg, length, pn, ehdr.flags)
if err != nil {
Errorf(nil, "%v", err)
return
}
ehdr.flags = flags
ctxt.Textp = append(ctxt.Textp, textp...)
}
return ldhostobj(ldelf, f, pkg, length, pn, file)
}