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Diffstat (limited to 'src/runtime/cgo/asm_mips64x.s')
| -rw-r--r-- | src/runtime/cgo/asm_mips64x.s | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/src/runtime/cgo/asm_mips64x.s b/src/runtime/cgo/asm_mips64x.s new file mode 100644 index 0000000..ba94807 --- /dev/null +++ b/src/runtime/cgo/asm_mips64x.s @@ -0,0 +1,83 @@ +// Copyright 2016 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 mips64 || mips64le +// +build mips64 mips64le + +#include "textflag.h" + +// Called by C code generated by cmd/cgo. +// func crosscall2(fn, a unsafe.Pointer, n int32, ctxt uintptr) +// Saves C callee-saved registers and calls cgocallback with three arguments. +// fn is the PC of a func(a unsafe.Pointer) function. +TEXT crosscall2(SB),NOSPLIT|NOFRAME,$0 + /* + * We still need to save all callee save register as before, and then + * push 3 args for fn (R4, R5, R7), skipping R6. + * Also note that at procedure entry in gc world, 8(R29) will be the + * first arg. + */ +#ifndef GOMIPS64_softfloat + ADDV $(-8*23), R29 +#else + ADDV $(-8*15), R29 +#endif + MOVV R4, (8*1)(R29) // fn unsafe.Pointer + MOVV R5, (8*2)(R29) // a unsafe.Pointer + MOVV R7, (8*3)(R29) // ctxt uintptr + MOVV R16, (8*4)(R29) + MOVV R17, (8*5)(R29) + MOVV R18, (8*6)(R29) + MOVV R19, (8*7)(R29) + MOVV R20, (8*8)(R29) + MOVV R21, (8*9)(R29) + MOVV R22, (8*10)(R29) + MOVV R23, (8*11)(R29) + MOVV RSB, (8*12)(R29) + MOVV g, (8*13)(R29) + MOVV R31, (8*14)(R29) +#ifndef GOMIPS64_softfloat + MOVD F24, (8*15)(R29) + MOVD F25, (8*16)(R29) + MOVD F26, (8*17)(R29) + MOVD F27, (8*18)(R29) + MOVD F28, (8*19)(R29) + MOVD F29, (8*20)(R29) + MOVD F30, (8*21)(R29) + MOVD F31, (8*22)(R29) +#endif + // Initialize Go ABI environment + // prepare SB register = PC & 0xffffffff00000000 + BGEZAL R0, 1(PC) + SRLV $32, R31, RSB + SLLV $32, RSB + JAL runtime·load_g(SB) + + JAL runtime·cgocallback(SB) + + MOVV (8*4)(R29), R16 + MOVV (8*5)(R29), R17 + MOVV (8*6)(R29), R18 + MOVV (8*7)(R29), R19 + MOVV (8*8)(R29), R20 + MOVV (8*9)(R29), R21 + MOVV (8*10)(R29), R22 + MOVV (8*11)(R29), R23 + MOVV (8*12)(R29), RSB + MOVV (8*13)(R29), g + MOVV (8*14)(R29), R31 +#ifndef GOMIPS64_softfloat + MOVD (8*15)(R29), F24 + MOVD (8*16)(R29), F25 + MOVD (8*17)(R29), F26 + MOVD (8*18)(R29), F27 + MOVD (8*19)(R29), F28 + MOVD (8*20)(R29), F29 + MOVD (8*21)(R29), F30 + MOVD (8*22)(R29), F31 + ADDV $(8*23), R29 +#else + ADDV $(8*15), R29 +#endif + RET |