mirror of https://github.com/golang/go.git
83 lines
2.0 KiB
ArmAsm
83 lines
2.0 KiB
ArmAsm
// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build mips64 || mips64le
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#include "textflag.h"
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// Called by C code generated by cmd/cgo.
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// func crosscall2(fn, a unsafe.Pointer, n int32, ctxt uintptr)
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// Saves C callee-saved registers and calls cgocallback with three arguments.
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// fn is the PC of a func(a unsafe.Pointer) function.
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TEXT crosscall2(SB),NOSPLIT|NOFRAME,$0
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/*
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* We still need to save all callee save register as before, and then
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* push 3 args for fn (R4, R5, R7), skipping R6.
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* Also note that at procedure entry in gc world, 8(R29) will be the
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* first arg.
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*/
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#ifndef GOMIPS64_softfloat
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ADDV $(-8*23), R29
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#else
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ADDV $(-8*15), R29
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#endif
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MOVV R4, (8*1)(R29) // fn unsafe.Pointer
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MOVV R5, (8*2)(R29) // a unsafe.Pointer
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MOVV R7, (8*3)(R29) // ctxt uintptr
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MOVV R16, (8*4)(R29)
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MOVV R17, (8*5)(R29)
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MOVV R18, (8*6)(R29)
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MOVV R19, (8*7)(R29)
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MOVV R20, (8*8)(R29)
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MOVV R21, (8*9)(R29)
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MOVV R22, (8*10)(R29)
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MOVV R23, (8*11)(R29)
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MOVV RSB, (8*12)(R29)
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MOVV g, (8*13)(R29)
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MOVV R31, (8*14)(R29)
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#ifndef GOMIPS64_softfloat
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MOVD F24, (8*15)(R29)
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MOVD F25, (8*16)(R29)
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MOVD F26, (8*17)(R29)
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MOVD F27, (8*18)(R29)
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MOVD F28, (8*19)(R29)
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MOVD F29, (8*20)(R29)
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MOVD F30, (8*21)(R29)
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MOVD F31, (8*22)(R29)
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#endif
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// Initialize Go ABI environment
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// prepare SB register = PC & 0xffffffff00000000
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BGEZAL R0, 1(PC)
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SRLV $32, R31, RSB
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SLLV $32, RSB
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JAL runtime·load_g(SB)
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JAL runtime·cgocallback(SB)
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MOVV (8*4)(R29), R16
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MOVV (8*5)(R29), R17
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MOVV (8*6)(R29), R18
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MOVV (8*7)(R29), R19
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MOVV (8*8)(R29), R20
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MOVV (8*9)(R29), R21
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MOVV (8*10)(R29), R22
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MOVV (8*11)(R29), R23
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MOVV (8*12)(R29), RSB
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MOVV (8*13)(R29), g
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MOVV (8*14)(R29), R31
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#ifndef GOMIPS64_softfloat
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MOVD (8*15)(R29), F24
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MOVD (8*16)(R29), F25
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MOVD (8*17)(R29), F26
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MOVD (8*18)(R29), F27
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MOVD (8*19)(R29), F28
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MOVD (8*20)(R29), F29
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MOVD (8*21)(R29), F30
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MOVD (8*22)(R29), F31
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ADDV $(8*23), R29
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#else
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ADDV $(8*15), R29
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#endif
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RET
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