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| author | Keith Randall <khr@golang.org> | 2025-06-18 16:10:58 -0700 |
|---|---|---|
| committer | Keith Randall <khr@golang.org> | 2025-08-05 08:59:16 -0700 |
| commit | 802d056c784d6baa8e5fc13a86e24ecc82ec2bf2 (patch) | |
| tree | 4ab4904afd649214d9d6e6248197de2ff9add747 /src/runtime | |
| parent | a3295df873bb22b3ba427124b1220370a5ca5cdb (diff) | |
| download | go-802d056c784d6baa8e5fc13a86e24ecc82ec2bf2.tar.xz | |
cmd/compile: move ppc64 over to new bounds check strategy
Change-Id: I25a9bbc247b2490e7e37ed843386f53a71822146
Reviewed-on: https://go-review.googlesource.com/c/go/+/682498
Reviewed-by: Paul Murphy <paumurph@redhat.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Diffstat (limited to 'src/runtime')
| -rw-r--r-- | src/runtime/asm_ppc64x.s | 85 |
1 files changed, 24 insertions, 61 deletions
diff --git a/src/runtime/asm_ppc64x.s b/src/runtime/asm_ppc64x.s index 96c87afac8..ecfc7c1671 100644 --- a/src/runtime/asm_ppc64x.s +++ b/src/runtime/asm_ppc64x.s @@ -1349,67 +1349,30 @@ TEXT runtime·debugCallPanicked(SB),NOSPLIT,$32-16 TW $31, R0, R0 RET #endif -// Note: these functions use a special calling convention to save generated code space. -// Arguments are passed in registers, but the space for those arguments are allocated -// in the caller's stack frame. These stubs write the args into that stack space and -// then tail call to the corresponding runtime handler. -// The tail call makes these stubs disappear in backtraces. -TEXT runtime·panicIndex<ABIInternal>(SB),NOSPLIT,$0-16 - JMP runtime·goPanicIndex<ABIInternal>(SB) -TEXT runtime·panicIndexU<ABIInternal>(SB),NOSPLIT,$0-16 - JMP runtime·goPanicIndexU<ABIInternal>(SB) -TEXT runtime·panicSliceAlen<ABIInternal>(SB),NOSPLIT,$0-16 - MOVD R4, R3 - MOVD R5, R4 - JMP runtime·goPanicSliceAlen<ABIInternal>(SB) -TEXT runtime·panicSliceAlenU<ABIInternal>(SB),NOSPLIT,$0-16 - MOVD R4, R3 - MOVD R5, R4 - JMP runtime·goPanicSliceAlenU<ABIInternal>(SB) -TEXT runtime·panicSliceAcap<ABIInternal>(SB),NOSPLIT,$0-16 - MOVD R4, R3 - MOVD R5, R4 - JMP runtime·goPanicSliceAcap<ABIInternal>(SB) -TEXT runtime·panicSliceAcapU<ABIInternal>(SB),NOSPLIT,$0-16 - MOVD R4, R3 - MOVD R5, R4 - JMP runtime·goPanicSliceAcapU<ABIInternal>(SB) -TEXT runtime·panicSliceB<ABIInternal>(SB),NOSPLIT,$0-16 - JMP runtime·goPanicSliceB<ABIInternal>(SB) -TEXT runtime·panicSliceBU<ABIInternal>(SB),NOSPLIT,$0-16 - JMP runtime·goPanicSliceBU<ABIInternal>(SB) -TEXT runtime·panicSlice3Alen<ABIInternal>(SB),NOSPLIT,$0-16 - MOVD R5, R3 - MOVD R6, R4 - JMP runtime·goPanicSlice3Alen<ABIInternal>(SB) -TEXT runtime·panicSlice3AlenU<ABIInternal>(SB),NOSPLIT,$0-16 - MOVD R5, R3 - MOVD R6, R4 - JMP runtime·goPanicSlice3AlenU<ABIInternal>(SB) -TEXT runtime·panicSlice3Acap<ABIInternal>(SB),NOSPLIT,$0-16 - MOVD R5, R3 - MOVD R6, R4 - JMP runtime·goPanicSlice3Acap<ABIInternal>(SB) -TEXT runtime·panicSlice3AcapU<ABIInternal>(SB),NOSPLIT,$0-16 - MOVD R5, R3 - MOVD R6, R4 - JMP runtime·goPanicSlice3AcapU<ABIInternal>(SB) -TEXT runtime·panicSlice3B<ABIInternal>(SB),NOSPLIT,$0-16 - MOVD R4, R3 - MOVD R5, R4 - JMP runtime·goPanicSlice3B<ABIInternal>(SB) -TEXT runtime·panicSlice3BU<ABIInternal>(SB),NOSPLIT,$0-16 - MOVD R4, R3 - MOVD R5, R4 - JMP runtime·goPanicSlice3BU<ABIInternal>(SB) -TEXT runtime·panicSlice3C<ABIInternal>(SB),NOSPLIT,$0-16 - JMP runtime·goPanicSlice3C<ABIInternal>(SB) -TEXT runtime·panicSlice3CU<ABIInternal>(SB),NOSPLIT,$0-16 - JMP runtime·goPanicSlice3CU<ABIInternal>(SB) -TEXT runtime·panicSliceConvert<ABIInternal>(SB),NOSPLIT,$0-16 - MOVD R5, R3 - MOVD R6, R4 - JMP runtime·goPanicSliceConvert<ABIInternal>(SB) + +TEXT runtime·panicBounds<ABIInternal>(SB),NOSPLIT,$104-0 + // Note: frame size is 16 bytes larger than necessary + // in order to pacify vet. Vet doesn't understand ppc64 + // layout properly. + NO_LOCAL_POINTERS + // Save all 8 int registers that could have an index in them. + // They may be pointers, but if they are they are dead. + // Skip R0 aka ZERO, R1 aka SP, R2 aka SB + MOVD R3, 48(R1) + MOVD R4, 56(R1) + MOVD R5, 64(R1) + MOVD R6, 72(R1) + MOVD R7, 80(R1) + MOVD R8, 88(R1) + MOVD R9, 96(R1) + MOVD R10, 104(R1) + // Note: we only save 8 reigsters to keep under nosplit stack limit + // Also, R11 is clobbered in dynamic linking situations + + MOVD LR, R3 // PC immediately after call to panicBounds + ADD $48, R1, R4 // pointer to save area + CALL runtime·panicBounds64<ABIInternal>(SB) + RET // These functions are used when internal linking cgo with external // objects compiled with the -Os on gcc. They reduce prologue/epilogue |