diff options
Diffstat (limited to 'src/reflect/asm_ppc64x.s')
| -rw-r--r-- | src/reflect/asm_ppc64x.s | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/src/reflect/asm_ppc64x.s b/src/reflect/asm_ppc64x.s new file mode 100644 index 0000000..3b529be --- /dev/null +++ b/src/reflect/asm_ppc64x.s @@ -0,0 +1,83 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build ppc64 || ppc64le + +#include "textflag.h" +#include "funcdata.h" +#include "asm_ppc64x.h" + +// The frames of each of the two functions below contain two locals, at offsets +// that are known to the runtime. +// +// The first local is a bool called retValid with a whole pointer-word reserved +// for it on the stack. The purpose of this word is so that the runtime knows +// whether the stack-allocated return space contains valid values for stack +// scanning. +// +// The second local is an abi.RegArgs value whose offset is also known to the +// runtime, so that a stack map for it can be constructed, since it contains +// pointers visible to the GC. + +#define LOCAL_RETVALID 32+FIXED_FRAME +#define LOCAL_REGARGS 40+FIXED_FRAME + +// The frame size of the functions below is +// 32 (args of callReflect) + 8 (bool + padding) + 296 (abi.RegArgs) = 336. + +// makeFuncStub is the code half of the function returned by MakeFunc. +// See the comment on the declaration of makeFuncStub in makefunc.go +// for more details. +// No arg size here, runtime pulls arg map out of the func value. +TEXT ·makeFuncStub(SB),(NOSPLIT|WRAPPER),$336 + NO_LOCAL_POINTERS + // NO_LOCAL_POINTERS is a lie. The stack map for the two locals in this + // frame is specially handled in the runtime. See the comment above LOCAL_RETVALID. + ADD $LOCAL_REGARGS, R1, R20 + CALL runtime·spillArgs(SB) + MOVD R11, FIXED_FRAME+32(R1) // save R11 + MOVD R11, FIXED_FRAME+0(R1) // arg for moveMakeFuncArgPtrs + MOVD R20, FIXED_FRAME+8(R1) // arg for local args + CALL ·moveMakeFuncArgPtrs(SB) + MOVD FIXED_FRAME+32(R1), R11 // restore R11 ctxt + MOVD R11, FIXED_FRAME+0(R1) // ctxt (arg0) + MOVD $argframe+0(FP), R3 // save arg to callArg + MOVD R3, FIXED_FRAME+8(R1) // frame (arg1) + ADD $LOCAL_RETVALID, R1, R3 // addr of return flag + MOVB R0, (R3) // clear flag + MOVD R3, FIXED_FRAME+16(R1) // addr retvalid (arg2) + ADD $LOCAL_REGARGS, R1, R3 + MOVD R3, FIXED_FRAME+24(R1) // abiregargs (arg3) + BL ·callReflect(SB) + ADD $LOCAL_REGARGS, R1, R20 // set address of spill area + CALL runtime·unspillArgs(SB) + RET + +// methodValueCall is the code half of the function returned by makeMethodValue. +// See the comment on the declaration of methodValueCall in makefunc.go +// for more details. +// No arg size here; runtime pulls arg map out of the func value. +TEXT ·methodValueCall(SB),(NOSPLIT|WRAPPER),$336 + NO_LOCAL_POINTERS + // NO_LOCAL_POINTERS is a lie. The stack map for the two locals in this + // frame is specially handled in the runtime. See the comment above LOCAL_RETVALID. + ADD $LOCAL_REGARGS, R1, R20 + CALL runtime·spillArgs(SB) + MOVD R11, FIXED_FRAME+0(R1) // arg0 ctxt + MOVD R11, FIXED_FRAME+32(R1) // save for later + MOVD R20, FIXED_FRAME+8(R1) // arg1 abiregargs + CALL ·moveMakeFuncArgPtrs(SB) + MOVD FIXED_FRAME+32(R1), R11 // restore ctxt + MOVD R11, FIXED_FRAME+0(R1) // set as arg0 + MOVD $argframe+0(FP), R3 // frame pointer + MOVD R3, FIXED_FRAME+8(R1) // set as arg1 + ADD $LOCAL_RETVALID, R1, R3 + MOVB $0, (R3) // clear ret flag + MOVD R3, FIXED_FRAME+16(R1) // addr of return flag + ADD $LOCAL_REGARGS, R1, R3 // addr of abiregargs + MOVD R3, FIXED_FRAME+24(R1) // set as arg3 + BL ·callMethod(SB) + ADD $LOCAL_REGARGS, R1, R20 + CALL runtime·unspillArgs(SB) + RET |