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runtime: fix breakpoint in ppc64x

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Currently runtime.Breakpoint generates a SIGSEGV in ppc64.
The solution is an unconditional trap similar to what clang
and gcc do. It is documented in the section C.6 of the ABI Book 3.

Fixes #52101
This commit is contained in:
Alejandro Sáez 2022-03-10 20:40:33 +01:00
parent 62d4c32b7e
commit fff4e5e8ff
1 changed files with 1 additions and 1 deletions
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src/runtime/asm_ppc64x.s
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@ -106,7 +106,7 @@ DATA runtime·mainPC+0(SB)/8,$runtime·main<ABIInternal>(SB)
GLOBL runtime·mainPC(SB),RODATA,$8 GLOBL runtime·mainPC(SB),RODATA,$8
TEXT runtime·breakpoint(SB),NOSPLIT|NOFRAME,$0-0 TEXT runtime·breakpoint(SB),NOSPLIT|NOFRAME,$0-0
MOVD R0, 0(R0) // TODO: TD TW $31, R0, R0
RET RET
TEXT runtime·asminit(SB),NOSPLIT|NOFRAME,$0-0 TEXT runtime·asminit(SB),NOSPLIT|NOFRAME,$0-0