Stowage/go
2
0
Fork 0
mirror of https://github.com/golang/go.git synced 2025-12-08 06:10:04 +00:00
Code Issues Projects Releases Packages Wiki Activity

cmd/internal/goobj: store relocation type as uint16

Browse source 
Currently, relocation type is stored as uint8 in object files, as
Go relocations do not exceed 255. In the linker, however, it is
used as a 16-bit type, because external relocations can exceed
255. The linker has to store the extra byte in a side table. This
complicates many things.

Just store it as uint16 in object files. This simplifies things,
with a small cost of increasing the object file sizes.

               before      after
hello.o         1672        1678
runtime.a    7927784     8056194

Change-Id: I313cf44ad0b8b3b76e35055ae55d911ff35e3158
Reviewed-on: https://go-review.googlesource.com/c/go/+/268477
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
This commit is contained in:
Cherry Zhang 2020-11-08 11:27:53 -05:00
parent 87d29939c8
commit f901ea701d
6 changed files with 40 additions and 64 deletions
Download patch file Download diff file Expand all files Collapse all files

3
src/cmd/link/internal/loader/loader_test.go
View file

@ -237,7 +237,8 @@ func sameRelocSlice(s1 *Relocs, s2 []Reloc) bool {
type addFunc func(l *Loader, s Sym, s2 Sym) Sym
func mkReloc(l *Loader, typ objabi.RelocType, off int32, siz uint8, add int64, sym Sym) Reloc {
r := Reloc{&goobj.Reloc{}, l.extReader, l, typ}
r := Reloc{&goobj.Reloc{}, l.extReader, l}
r.SetType(typ)
r.SetOff(off)
r.SetSiz(siz)
r.SetAdd(add)