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cmd/compile: refactor stackmap dumping code

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Also, fix a byte-ordering problem with stack maps for assembly
function signatures on big-endian targets.

Change-Id: I6e8698f5fbb04b31771a65f4a8f3f9c045ff3c98
Reviewed-on: https://go-review.googlesource.com/30816
Reviewed-by: Austin Clements <austin@google.com>
This commit is contained in:
Matthew Dempsky 2016-10-11 10:23:14 -07:00
parent 15817e409b
commit 943f5afe22
3 changed files with 17 additions and 17 deletions
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13
src/cmd/compile/internal/gc/obj.go
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@ -271,6 +271,19 @@ func duintptr(s *Sym, off int, v uint64) int {
return duintxx(s, off, v, Widthptr)
}
func dbvec(s *Sym, off int, bv bvec) int {
for j := 0; int32(j) < bv.n; j += 32 {
word := bv.b[j/32]
// Runtime reads the bitmaps as byte arrays. Oblige.
off = duint8(s, off, uint8(word))
off = duint8(s, off, uint8(word>>8))
off = duint8(s, off, uint8(word>>16))
off = duint8(s, off, uint8(word>>24))
}
return off
}
// stringConstantSyms holds the pair of symbols we create for a
// constant string.
type stringConstantSyms struct {