github.com/lovishpuri/go-40569/src@v0.0.0-20230519171745-f8623e7c56cf/reflect/asm_ppc64x.s (about) 1 // Copyright 2012 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 //go:build ppc64 || ppc64le 6 7 #include "textflag.h" 8 #include "funcdata.h" 9 #include "asm_ppc64x.h" 10 11 // The frames of each of the two functions below contain two locals, at offsets 12 // that are known to the runtime. 13 // 14 // The first local is a bool called retValid with a whole pointer-word reserved 15 // for it on the stack. The purpose of this word is so that the runtime knows 16 // whether the stack-allocated return space contains valid values for stack 17 // scanning. 18 // 19 // The second local is an abi.RegArgs value whose offset is also known to the 20 // runtime, so that a stack map for it can be constructed, since it contains 21 // pointers visible to the GC. 22 23 #define LOCAL_RETVALID 32+FIXED_FRAME 24 #define LOCAL_REGARGS 40+FIXED_FRAME 25 26 // The frame size of the functions below is 27 // 32 (args of callReflect) + 8 (bool + padding) + 296 (abi.RegArgs) = 336. 28 29 // makeFuncStub is the code half of the function returned by MakeFunc. 30 // See the comment on the declaration of makeFuncStub in makefunc.go 31 // for more details. 32 // No arg size here, runtime pulls arg map out of the func value. 33 TEXT ·makeFuncStub(SB),(NOSPLIT|WRAPPER),$336 34 NO_LOCAL_POINTERS 35 // NO_LOCAL_POINTERS is a lie. The stack map for the two locals in this 36 // frame is specially handled in the runtime. See the comment above LOCAL_RETVALID. 37 ADD $LOCAL_REGARGS, R1, R20 38 CALL runtime·spillArgs(SB) 39 MOVD R11, FIXED_FRAME+32(R1) // save R11 40 MOVD R11, FIXED_FRAME+0(R1) // arg for moveMakeFuncArgPtrs 41 MOVD R20, FIXED_FRAME+8(R1) // arg for local args 42 CALL ·moveMakeFuncArgPtrs(SB) 43 MOVD FIXED_FRAME+32(R1), R11 // restore R11 ctxt 44 MOVD R11, FIXED_FRAME+0(R1) // ctxt (arg0) 45 MOVD $argframe+0(FP), R3 // save arg to callArg 46 MOVD R3, FIXED_FRAME+8(R1) // frame (arg1) 47 ADD $LOCAL_RETVALID, R1, R3 // addr of return flag 48 MOVB R0, (R3) // clear flag 49 MOVD R3, FIXED_FRAME+16(R1) // addr retvalid (arg2) 50 ADD $LOCAL_REGARGS, R1, R3 51 MOVD R3, FIXED_FRAME+24(R1) // abiregargs (arg3) 52 BL ·callReflect(SB) 53 ADD $LOCAL_REGARGS, R1, R20 // set address of spill area 54 CALL runtime·unspillArgs(SB) 55 RET 56 57 // methodValueCall is the code half of the function returned by makeMethodValue. 58 // See the comment on the declaration of methodValueCall in makefunc.go 59 // for more details. 60 // No arg size here; runtime pulls arg map out of the func value. 61 TEXT ·methodValueCall(SB),(NOSPLIT|WRAPPER),$336 62 NO_LOCAL_POINTERS 63 // NO_LOCAL_POINTERS is a lie. The stack map for the two locals in this 64 // frame is specially handled in the runtime. See the comment above LOCAL_RETVALID. 65 ADD $LOCAL_REGARGS, R1, R20 66 CALL runtime·spillArgs(SB) 67 MOVD R11, FIXED_FRAME+0(R1) // arg0 ctxt 68 MOVD R11, FIXED_FRAME+32(R1) // save for later 69 MOVD R20, FIXED_FRAME+8(R1) // arg1 abiregargs 70 CALL ·moveMakeFuncArgPtrs(SB) 71 MOVD FIXED_FRAME+32(R1), R11 // restore ctxt 72 MOVD R11, FIXED_FRAME+0(R1) // set as arg0 73 MOVD $argframe+0(FP), R3 // frame pointer 74 MOVD R3, FIXED_FRAME+8(R1) // set as arg1 75 ADD $LOCAL_RETVALID, R1, R3 76 MOVB $0, (R3) // clear ret flag 77 MOVD R3, FIXED_FRAME+16(R1) // addr of return flag 78 ADD $LOCAL_REGARGS, R1, R3 // addr of abiregargs 79 MOVD R3, FIXED_FRAME+24(R1) // set as arg3 80 BL ·callMethod(SB) 81 ADD $LOCAL_REGARGS, R1, R20 82 CALL runtime·unspillArgs(SB) 83 RET