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go.sys/unix: just jump to syscall.Syscall etc.

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Don't re-implement these functions.

LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/124390043
This commit is contained in:
Rob Pike
2014-08-14 12:30:17 -07:00
parent ba5045e1e0
commit aec3c6a331
15 changed files with 109 additions and 1780 deletions
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unix/asm_netbsd_arm.s
+7 -106
View File
@@ -8,119 +8,20 @@
// System call support for ARM, NetBSD
//
// func Syscall(trap int32, a1, a2, a3 int32) (r1, r2, err int32);
// func Syscall6(trap int32, a1, a2, a3, a4, a5, a6 int32) (r1, r2, err int32);
// func Syscall9(trap int32, a1, a2, a3, a4, a5, a6, a7, a8, a9 int64) (r1, r2, err int32)
// Just jump to package syscall's implementation for all these functions.
// The runtime may know about them.
TEXT ·Syscall(SB),NOSPLIT,$0-28
BL runtime·entersyscall(SB)
MOVW 0(FP), R0 // sigcall num
MOVW 4(FP), R1 // a1
MOVW 8(FP), R2 // a2
MOVW 12(FP), R3 // a3
SWI $0 // syscall
MOVW $0, R2
BCS error
MOVW R0, 16(FP) // r1
MOVW R1, 20(FP) // r2
MOVW R2, 24(FP) // err
BL runtime·exitsyscall(SB)
RET
error:
MOVW $-1, R3
MOVW R3, 16(FP) // r1
MOVW R2, 20(FP) // r2
MOVW R0, 24(FP) // err
BL runtime·exitsyscall(SB)
RET
JMP syscall·Syscall(SB)
TEXT ·Syscall6(SB),NOSPLIT,$0-40
BL runtime·entersyscall(SB)
MOVW 0(FP), R0 // sigcall num
MOVW 4(FP), R1 // a1
MOVW 8(FP), R2 // a2
MOVW 12(FP), R3 // a3
MOVW R13, R4
MOVW $16(FP), R13 // a4 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) // err
BL runtime·exitsyscall(SB)
RET
error6:
MOVW $-1, R3
MOVW R3, 28(FP) // r1
MOVW R2, 32(FP) // r2
MOVW R0, 36(FP) // err
BL runtime·exitsyscall(SB)
RET
JMP syscall·Syscall6(SB)
TEXT ·Syscall9(SB),NOSPLIT,$0-52
BL runtime·entersyscall(SB)
MOVW 0(FP), R0 // sigcall num
MOVW 4(FP), R1 // a1
MOVW 8(FP), R2 // a2
MOVW 12(FP), R3 // a3
MOVW R13, R4
MOVW $16(FP), R13 // a4 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) // err
BL runtime·exitsyscall(SB)
RET
error9:
MOVW $-1, R3
MOVW R3, 40(FP) // r1
MOVW R2, 44(FP) // r2
MOVW R0, 48(FP) // err
BL runtime·exitsyscall(SB)
RET
JMP syscall·Syscall9(SB)
TEXT ·RawSyscall(SB),NOSPLIT,$0-28
MOVW 0(FP), R0 // sigcall num
MOVW 4(FP), R1 // a1
MOVW 8(FP), R2 // a2
MOVW 12(FP), R3 // a3
SWI $0 // syscall
MOVW $0, R2
BCS errorr
MOVW R0, 16(FP) // r1
MOVW R1, 20(FP) // r2
MOVW R2, 24(FP) // err
RET
errorr:
MOVW $-1, R3
MOVW R3, 16(FP) // r1
MOVW R2, 20(FP) // r2
MOVW R0, 24(FP) // err
RET
JMP syscall·RawSyscall(SB)
TEXT ·RawSyscall6(SB),NOSPLIT,$0-40
MOVW 0(FP), R0 // sigcall num
MOVW 4(FP), R1 // a1
MOVW 8(FP), R2 // a2
MOVW 12(FP), R3 // a3
MOVW R13, R4
MOVW $16(FP), R13 // a4 to a9 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) // err
RET
errorr6:
MOVW $-1, R3
MOVW R3, 28(FP) // r1
MOVW R2, 32(FP) // r2
MOVW R0, 36(FP) // err
RET
JMP syscall·RawSyscall6(SB)