root/src/pkg/syscall/asm_freebsd_arm.s

// Copyright 2012 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 "../../cmd/ld/textflag.h"

//
// System call support for ARM, FreeBSD
//

// func Syscall(trap, a1, a2, a3 uintptr) (r1, r2, errno uintptr);
// func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr);
// func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2, errno uintptr)

TEXT    ·Syscall(SB),NOSPLIT,$0-28
        BL runtime·entersyscall(SB)
        MOVW 0(FP), R7 // syscall number
        MOVW 4(FP), R0 // a1
        MOVW 8(FP), R1 // a2
        MOVW 12(FP), R2 // a3
        SWI $0 // syscall
        MOVW $0, R2
        BCS error
        MOVW R0, 16(FP) // r1
        MOVW R1, 20(FP) // r2
        MOVW R2, 24(FP) // errno
        BL runtime·exitsyscall(SB)
        RET
error:
        MOVW $-1, R3
        MOVW R3, 16(FP) // r1
        MOVW R2, 20(FP) // r2
        MOVW R0, 24(FP) // errno
        BL runtime·exitsyscall(SB)
        RET

TEXT    ·Syscall6(SB),NOSPLIT,$0-40
        BL runtime·entersyscall(SB)
        MOVW 0(FP), R7 // syscall number
        MOVW 4(FP), R0 // a1
        MOVW 8(FP), R1 // a2
        MOVW 12(FP), R2 // a3
        MOVW 16(FP), R3 // a4
        MOVW R13, R4
        MOVW $20(FP), R13 // a5 to a6 are passed on stack
        SWI $0 // syscall
        MOVW R4, R13
        MOVW $0, R2
        BCS error6
        MOVW R0, 28(FP) // r1
        MOVW R1, 32(FP) // r2
        MOVW R2, 36(FP) // errno
        BL runtime·exitsyscall(SB)
        RET
error6:
        MOVW $-1, R3
        MOVW R3, 28(FP) // r1
        MOVW R2, 32(FP) // r2
        MOVW R0, 36(FP) // errno
        BL runtime·exitsyscall(SB)
        RET

TEXT    ·Syscall9(SB),NOSPLIT,$0-52
        BL runtime·entersyscall(SB)
        MOVW 0(FP), R7 // syscall number
        MOVW 4(FP), R0 // a1
        MOVW 8(FP), R1 // a2
        MOVW 12(FP), R2 // a3
        MOVW 16(FP), R3 // a4
        MOVW R13, R4
        MOVW $20(FP), R13 // a5 to a9 are passed on stack
        SWI $0 // syscall
        MOVW R4, R13
        MOVW $0, R2
        BCS error9
        MOVW R0, 40(FP) // r1
        MOVW R1, 44(FP) // r2
        MOVW R2, 48(FP) // errno
        BL runtime·exitsyscall(SB)
        RET
error9:
        MOVW $-1, R3
        MOVW R3, 40(FP) // r1
        MOVW R2, 44(FP) // r2
        MOVW R0, 48(FP) // errno
        BL runtime·exitsyscall(SB)
        RET

TEXT    ·RawSyscall(SB),NOSPLIT,$0-28
        MOVW 0(FP), R7 // syscall number
        MOVW 4(FP), R0 // a1
        MOVW 8(FP), R1 // a2
        MOVW 12(FP), R2 // a3
        SWI $0 // syscall
        MOVW $0, R2
        BCS errorr
        MOVW R0, 16(FP) // r1
        MOVW R1, 20(FP) // r2
        MOVW R2, 24(FP) // errno
        RET
errorr:
        MOVW $-1, R3
        MOVW R3, 16(FP) // r1
        MOVW R2, 20(FP) // r2
        MOVW R0, 24(FP) // errno
        RET

TEXT    ·RawSyscall6(SB),NOSPLIT,$0-40
        MOVW 0(FP), R7 // syscall number
        MOVW 4(FP), R0 // a1
        MOVW 8(FP), R1 // a2
        MOVW 12(FP), R2 // a3
        MOVW 16(FP), R3 // a4
        MOVW R13, R4
        MOVW $20(FP), R13 // a5 to a6 are passed on stack
        SWI $0 // syscall
        MOVW R4, R13
        MOVW $0, R2
        BCS errorr6
        MOVW R0, 28(FP) // r1
        MOVW R1, 32(FP) // r2
        MOVW R2, 36(FP) // errno
        RET
errorr6:
        MOVW $-1, R3
        MOVW R3, 28(FP) // r1
        MOVW R2, 32(FP) // r2
        MOVW R0, 36(FP) // errno
        RET