| // Copyright 2019 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. |
| |
| #include "textflag.h" |
| #include "funcdata.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 40 |
| #define LOCAL_REGARGS 48 |
| |
| // The frame size of the functions below is |
| // 32 (args of callReflect/callMethod) + (8 bool with padding) + 392 (abi.RegArgs) = 432. |
| |
| // 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),$432 |
| NO_LOCAL_POINTERS |
| ADD $LOCAL_REGARGS, SP, X25 // spillArgs using X25 |
| CALL runtime·spillArgs(SB) |
| MOV CTXT, 32(SP) // save CTXT > args of moveMakeFuncArgPtrs < LOCAL_REGARGS |
| MOV CTXT, 8(SP) |
| MOV X25, 16(SP) |
| CALL ·moveMakeFuncArgPtrs(SB) |
| MOV 32(SP), CTXT // restore CTXT |
| |
| MOV CTXT, 8(SP) |
| MOV $argframe+0(FP), T0 |
| MOV T0, 16(SP) |
| MOV ZERO, LOCAL_RETVALID(SP) |
| ADD $LOCAL_RETVALID, SP, T1 |
| MOV T1, 24(SP) |
| ADD $LOCAL_REGARGS, SP, T1 |
| MOV T1, 32(SP) |
| CALL ·callReflect(SB) |
| ADD $LOCAL_REGARGS, SP, X25 // unspillArgs using X25 |
| 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),$432 |
| NO_LOCAL_POINTERS |
| ADD $LOCAL_REGARGS, SP, X25 // spillArgs using X25 |
| CALL runtime·spillArgs(SB) |
| MOV CTXT, 32(SP) // save CTXT |
| MOV CTXT, 8(SP) |
| MOV X25, 16(SP) |
| CALL ·moveMakeFuncArgPtrs(SB) |
| MOV 32(SP), CTXT // restore CTXT |
| MOV CTXT, 8(SP) |
| MOV $argframe+0(FP), T0 |
| MOV T0, 16(SP) |
| MOV ZERO, LOCAL_RETVALID(SP) |
| ADD $LOCAL_RETVALID, SP, T1 |
| MOV T1, 24(SP) |
| ADD $LOCAL_REGARGS, SP, T1 |
| MOV T1, 32(SP) // frame size to 32+SP as callreflect args |
| CALL ·callMethod(SB) |
| ADD $LOCAL_REGARGS, SP, X25 // unspillArgs using X25 |
| CALL runtime·unspillArgs(SB) |
| RET |
