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[dev.regabi] runtime: fix ABI targets in runtime.panic{Index,Slice} shims

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Fix up the assembly shim routines runtime.panic{Index,Slice} and
friends so that their tail calls target ABIInternal and not ABI0
functions. This is so as to ensure that these calls don't go through
an ABI0->ABIInternal wrapper (which would throw off the machinery in
the called routines designed to detect whether the violation happened
in the runtime).

Note that when the compiler starts emitting real register calls to
these routines, we'll need to rewrite them to update the arg size and
ensure that args are in the correct registers. For example, the
current shim

TEXT runtime·panicIndex<ABIInternal>(SB),NOSPLIT,$0-16
	MOVQ	AX, x+0(FP)
	MOVQ	CX, y+8(FP)
	JMP	runtime·goPanicIndex<ABIInternal>(SB)

will need to change to

TEXT runtime·panicIndex<ABIInternal>(SB),NOSPLIT,$0
	// AX already set up properly
	MOVQ	CX, BX // second argument expected in BX
	JMP	runtime·goPanicIndex<ABIInternal>(SB)

Change-Id: I48d1b5138fb4d229380ad12735cfaca5c50e6cc3
Reviewed-on: https://go-review.googlesource.com/c/go/+/278755
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Trust: Than McIntosh <thanm@google.com>
This commit is contained in:
Than McIntosh 2020-12-14 10:03:37 -05:00
parent 94cfeca0a5
commit 306b2451c8
1 changed files with 16 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

32
src/runtime/asm_amd64.s
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@ -1728,67 +1728,67 @@ TEXT runtime·debugCallPanicked(SB),NOSPLIT,$16-16
TEXT runtime·panicIndex<ABIInternal>(SB),NOSPLIT,$0-16
MOVQ AX, x+0(FP)
MOVQ CX, y+8(FP)
JMP runtime·goPanicIndex(SB)
JMP runtime·goPanicIndex<ABIInternal>(SB)
TEXT runtime·panicIndexU<ABIInternal>(SB),NOSPLIT,$0-16
MOVQ AX, x+0(FP)
MOVQ CX, y+8(FP)
JMP runtime·goPanicIndexU(SB)
JMP runtime·goPanicIndexU<ABIInternal>(SB)
TEXT runtime·panicSliceAlen<ABIInternal>(SB),NOSPLIT,$0-16
MOVQ CX, x+0(FP)
MOVQ DX, y+8(FP)
JMP runtime·goPanicSliceAlen(SB)
JMP runtime·goPanicSliceAlen<ABIInternal>(SB)
TEXT runtime·panicSliceAlenU<ABIInternal>(SB),NOSPLIT,$0-16
MOVQ CX, x+0(FP)
MOVQ DX, y+8(FP)
JMP runtime·goPanicSliceAlenU(SB)
JMP runtime·goPanicSliceAlenU<ABIInternal>(SB)
TEXT runtime·panicSliceAcap<ABIInternal>(SB),NOSPLIT,$0-16
MOVQ CX, x+0(FP)
MOVQ DX, y+8(FP)
JMP runtime·goPanicSliceAcap(SB)
JMP runtime·goPanicSliceAcap<ABIInternal>(SB)
TEXT runtime·panicSliceAcapU<ABIInternal>(SB),NOSPLIT,$0-16
MOVQ CX, x+0(FP)
MOVQ DX, y+8(FP)
JMP runtime·goPanicSliceAcapU(SB)
JMP runtime·goPanicSliceAcapU<ABIInternal>(SB)
TEXT runtime·panicSliceB<ABIInternal>(SB),NOSPLIT,$0-16
MOVQ AX, x+0(FP)
MOVQ CX, y+8(FP)
JMP runtime·goPanicSliceB(SB)
JMP runtime·goPanicSliceB<ABIInternal>(SB)
TEXT runtime·panicSliceBU<ABIInternal>(SB),NOSPLIT,$0-16
MOVQ AX, x+0(FP)
MOVQ CX, y+8(FP)
JMP runtime·goPanicSliceBU(SB)
JMP runtime·goPanicSliceBU<ABIInternal>(SB)
TEXT runtime·panicSlice3Alen<ABIInternal>(SB),NOSPLIT,$0-16
MOVQ DX, x+0(FP)
MOVQ BX, y+8(FP)
JMP runtime·goPanicSlice3Alen(SB)
JMP runtime·goPanicSlice3Alen<ABIInternal>(SB)
TEXT runtime·panicSlice3AlenU<ABIInternal>(SB),NOSPLIT,$0-16
MOVQ DX, x+0(FP)
MOVQ BX, y+8(FP)
JMP runtime·goPanicSlice3AlenU(SB)
JMP runtime·goPanicSlice3AlenU<ABIInternal>(SB)
TEXT runtime·panicSlice3Acap<ABIInternal>(SB),NOSPLIT,$0-16
MOVQ DX, x+0(FP)
MOVQ BX, y+8(FP)
JMP runtime·goPanicSlice3Acap(SB)
JMP runtime·goPanicSlice3Acap<ABIInternal>(SB)
TEXT runtime·panicSlice3AcapU<ABIInternal>(SB),NOSPLIT,$0-16
MOVQ DX, x+0(FP)
MOVQ BX, y+8(FP)
JMP runtime·goPanicSlice3AcapU(SB)
JMP runtime·goPanicSlice3AcapU<ABIInternal>(SB)
TEXT runtime·panicSlice3B<ABIInternal>(SB),NOSPLIT,$0-16
MOVQ CX, x+0(FP)
MOVQ DX, y+8(FP)
JMP runtime·goPanicSlice3B(SB)
JMP runtime·goPanicSlice3B<ABIInternal>(SB)
TEXT runtime·panicSlice3BU<ABIInternal>(SB),NOSPLIT,$0-16
MOVQ CX, x+0(FP)
MOVQ DX, y+8(FP)
JMP runtime·goPanicSlice3BU(SB)
JMP runtime·goPanicSlice3BU<ABIInternal>(SB)
TEXT runtime·panicSlice3C<ABIInternal>(SB),NOSPLIT,$0-16
MOVQ AX, x+0(FP)
MOVQ CX, y+8(FP)
JMP runtime·goPanicSlice3C(SB)
JMP runtime·goPanicSlice3C<ABIInternal>(SB)
TEXT runtime·panicSlice3CU<ABIInternal>(SB),NOSPLIT,$0-16
MOVQ AX, x+0(FP)
MOVQ CX, y+8(FP)
JMP runtime·goPanicSlice3CU(SB)
JMP runtime·goPanicSlice3CU<ABIInternal>(SB)
#ifdef GOOS_android
// Use the free TLS_SLOT_APP slot #2 on Android Q.