cmd/internal/obj/x86: imprecise "offset overflow" error message on AMD64 #24871
Description
CL59630 introduced additional offset overflow checks for AMD64.
This issue reports regression in error message quality.
What did you do?
Assemble this file with go tool asm on AMD64 platform:
TEXT badOffset(SB), 0, $0
MOVL 999999999999(AX), AX
RETWhat did you expect to see?
Error about offset (displacement) overflow.
Something like "offset too large".
What did you see instead?
Generic "invalid instruction" error.
go tool asm foo.s
asm: invalid instruction: 00000 (foo.s:2) MOVL 999999999999(AX), AX
asm: assembly failed
Note: it works on GOARCH=386 as expected:
GOARCH=386 go tool asm foo.s
asm: offset too large in 00018 (foo.s:2) MOVL 999999999999(AX), AX
asm: assembly failed
Related to #21860.