blob: ae688b69f2678f757923cbd836f3e85e54c2dd85 [file] [log] [blame]
// 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.
#include "textflag.h"
// Called by C code generated by cmd/cgo.
// func crosscall2(fn func(a unsafe.Pointer, n int32, ctxt uintptr), a unsafe.Pointer, n int32, ctxt uintptr)
// Saves C callee-saved registers and calls fn with three arguments.
TEXT crosscall2(SB),NOSPLIT|NOFRAME,$0
// Start with standard C stack frame layout and linkage
// Save R6-R15, F0, F2, F4 and F6 in the
// register save area of the calling function
STMG R6, R15, 48(R15)
FMOVD F0, 128(R15)
FMOVD F2, 136(R15)
FMOVD F4, 144(R15)
FMOVD F6, 152(R15)
// Initialize Go ABI environment
XOR R0, R0
BL runtimeĀ·load_g(SB)
// Allocate 32 bytes on the stack
SUB $32, R15
MOVD R3, 8(R15) // arg1
MOVW R4, 16(R15) // arg2
MOVD R5, 24(R15) // arg3
BL (R2) // fn(arg1, arg2, arg3)
ADD $32, R15
// Restore R6-R15, F0, F2, F4 and F6
LMG 48(R15), R6, R15
FMOVD F0, 128(R15)
FMOVD F2, 136(R15)
FMOVD F4, 144(R15)
FMOVD F6, 152(R15)
RET