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Diffstat (limited to 'src/runtime/cgo/asm_arm64.s')
| -rw-r--r-- | src/runtime/cgo/asm_arm64.s | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/src/runtime/cgo/asm_arm64.s b/src/runtime/cgo/asm_arm64.s new file mode 100644 index 0000000..1cb25cf --- /dev/null +++ b/src/runtime/cgo/asm_arm64.s @@ -0,0 +1,70 @@ +// Copyright 2015 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" + +// 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 (R0, R1, R3), skipping R2. + * Also note that at procedure entry in gc world, 8(RSP) will be the + * first arg. + * TODO(minux): use LDP/STP here if it matters. + */ + SUB $(8*24), RSP + MOVD R0, (8*1)(RSP) + MOVD R1, (8*2)(RSP) + MOVD R3, (8*3)(RSP) + MOVD R19, (8*4)(RSP) + MOVD R20, (8*5)(RSP) + MOVD R21, (8*6)(RSP) + MOVD R22, (8*7)(RSP) + MOVD R23, (8*8)(RSP) + MOVD R24, (8*9)(RSP) + MOVD R25, (8*10)(RSP) + MOVD R26, (8*11)(RSP) + MOVD R27, (8*12)(RSP) + MOVD g, (8*13)(RSP) + MOVD R29, (8*14)(RSP) + MOVD R30, (8*15)(RSP) + FMOVD F8, (8*16)(RSP) + FMOVD F9, (8*17)(RSP) + FMOVD F10, (8*18)(RSP) + FMOVD F11, (8*19)(RSP) + FMOVD F12, (8*20)(RSP) + FMOVD F13, (8*21)(RSP) + FMOVD F14, (8*22)(RSP) + FMOVD F15, (8*23)(RSP) + + // Initialize Go ABI environment + BL runtime·load_g(SB) + + BL runtime·cgocallback(SB) + + MOVD (8*4)(RSP), R19 + MOVD (8*5)(RSP), R20 + MOVD (8*6)(RSP), R21 + MOVD (8*7)(RSP), R22 + MOVD (8*8)(RSP), R23 + MOVD (8*9)(RSP), R24 + MOVD (8*10)(RSP), R25 + MOVD (8*11)(RSP), R26 + MOVD (8*12)(RSP), R27 + MOVD (8*13)(RSP), g + MOVD (8*14)(RSP), R29 + MOVD (8*15)(RSP), R30 + FMOVD (8*16)(RSP), F8 + FMOVD (8*17)(RSP), F9 + FMOVD (8*18)(RSP), F10 + FMOVD (8*19)(RSP), F11 + FMOVD (8*20)(RSP), F12 + FMOVD (8*21)(RSP), F13 + FMOVD (8*22)(RSP), F14 + FMOVD (8*23)(RSP), F15 + ADD $(8*24), RSP + RET |