diff options
Diffstat (limited to 'src/runtime/string.go')
| -rw-r--r-- | src/runtime/string.go | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/runtime/string.go b/src/runtime/string.go index e958f763cf..31518aed70 100644 --- a/src/runtime/string.go +++ b/src/runtime/string.go @@ -411,6 +411,18 @@ func findnull(s *byte) int { return 0 } + // Avoid IndexByteString on Plan 9 because it uses SSE instructions + // on x86 machines, and those are classified as floating point instructions, + // which are illegal in a note handler. + if GOOS == "plan9" { + p := (*[maxAlloc/2 - 1]byte)(unsafe.Pointer(s)) + l := 0 + for p[l] != 0 { + l++ + } + return l + } + // pageSize is the unit we scan at a time looking for NULL. // It must be the minimum page size for any architecture Go // runs on. It's okay (just a minor performance loss) if the |