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// Copyright 2009 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" #include "funcdata.h" // // System calls for arm, Linux // // func Syscall(syscall uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr); TEXT ·Syscall(SB),NOSPLIT,$0-28 BL runtime·entersyscall(SB) MOVW trap+0(FP), R7 MOVW a1+4(FP), R0 MOVW a2+8(FP), R1 MOVW a3+12(FP), R2 MOVW $0, R3 MOVW $0, R4 MOVW $0, R5 SWI $0 MOVW $0xfffff001, R1 CMP R1, R0 BLS ok MOVW $-1, R1 MOVW R1, r1+16(FP) MOVW $0, R2 MOVW R2, r2+20(FP) RSB $0, R0, R0 MOVW R0, err+24(FP) BL runtime·exitsyscall(SB) RET ok: MOVW R0, r1+16(FP) MOVW $0, R0 MOVW R0, r2+20(FP) MOVW R0, err+24(FP) BL runtime·exitsyscall(SB) RET // func Syscall6(trap uintptr, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr); // Actually Syscall5 but the rest of the code expects it to be named Syscall6. TEXT ·Syscall6(SB),NOSPLIT,$0-40 BL runtime·entersyscall(SB) MOVW trap+0(FP), R7 // syscall entry MOVW a1+4(FP), R0 MOVW a2+8(FP), R1 MOVW a3+12(FP), R2 MOVW a4+16(FP), R3 MOVW a5+20(FP), R4 MOVW a6+24(FP), R5 SWI $0 MOVW $0xfffff001, R6 CMP R6, R0 BLS ok6 MOVW $-1, R1 MOVW R1, r1+28(FP) MOVW $0, R2 MOVW R2, r2+32(FP) RSB $0, R0, R0 MOVW R0, err+36(FP) BL runtime·exitsyscall(SB) RET ok6: MOVW R0, r1+28(FP) MOVW R1, r2+32(FP) MOVW $0, R0 MOVW R0, err+36(FP) BL runtime·exitsyscall(SB) RET // func RawSyscall6(trap uintptr, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr); // Actually RawSyscall5 but the rest of the code expects it to be named RawSyscall6. TEXT ·RawSyscall6(SB),NOSPLIT,$0-40 MOVW trap+0(FP), R7 // syscall entry MOVW a1+4(FP), R0 MOVW a2+8(FP), R1 MOVW a3+12(FP), R2 MOVW a4+16(FP), R3 MOVW a5+20(FP), R4 MOVW a6+24(FP), R5 SWI $0 MOVW $0xfffff001, R6 CMP R6, R0 BLS ok2 MOVW $-1, R1 MOVW R1, r1+28(FP) MOVW $0, R2 MOVW R2, r2+32(FP) RSB $0, R0, R0 MOVW R0, err+36(FP) RET ok2: MOVW R0, r1+28(FP) MOVW R1, r2+32(FP) MOVW $0, R0 MOVW R0, err+36(FP) RET #define SYS__LLSEEK 140 /* from zsysnum_linux_arm.go */ // func seek(fd int, offset int64, whence int) (newoffset int64, errno int) // Implemented in assembly to avoid allocation when // taking the address of the return value newoffset. // Underlying system call is // llseek(int fd, int offhi, int offlo, int64 *result, int whence) TEXT ·seek(SB),NOSPLIT,$0-28 BL runtime·entersyscall(SB) MOVW $SYS__LLSEEK, R7 // syscall entry MOVW fd+0(FP), R0 MOVW offset_hi+8(FP), R1 MOVW offset_lo+4(FP), R2 MOVW $newoffset_lo+16(FP), R3 MOVW whence+12(FP), R4 SWI $0 MOVW $0xfffff001, R6 CMP R6, R0 BLS okseek MOVW $0, R1 MOVW R1, newoffset_lo+16(FP) MOVW R1, newoffset_hi+20(FP) RSB $0, R0, R0 MOVW R0, err+24(FP) BL runtime·exitsyscall(SB) RET okseek: // system call filled in newoffset already MOVW $0, R0 MOVW R0, err+24(FP) BL runtime·exitsyscall(SB) RET // func RawSyscall(trap uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr); TEXT ·RawSyscall(SB),NOSPLIT,$0-28 MOVW trap+0(FP), R7 // syscall entry MOVW a1+4(FP), R0 MOVW a2+8(FP), R1 MOVW a3+12(FP), R2 SWI $0 MOVW $0xfffff001, R1 CMP R1, R0 BLS ok1 MOVW $-1, R1 MOVW R1, r1+16(FP) MOVW $0, R2 MOVW R2, r2+20(FP) RSB $0, R0, R0 MOVW R0, err+24(FP) RET ok1: MOVW R0, r1+16(FP) MOVW $0, R0 MOVW R0, r2+20(FP) MOVW R0, err+24(FP) RET // func rawVforkSyscall(trap, a1 uintptr) (r1, err uintptr) TEXT ·rawVforkSyscall(SB),NOSPLIT|NOFRAME,$0-16 MOVW trap+0(FP), R7 // syscall entry MOVW a1+4(FP), R0 MOVW $0, R1 MOVW $0, R2 SWI $0 MOVW $0xfffff001, R1 CMP R1, R0 BLS ok MOVW $-1, R1 MOVW R1, r1+8(FP) RSB $0, R0, R0 MOVW R0, err+12(FP) RET ok: MOVW R0, r1+8(FP) MOVW $0, R0 MOVW R0, err+12(FP) RET // func rawSyscallNoError(trap uintptr, a1, a2, a3 uintptr) (r1, r2 uintptr); TEXT ·rawSyscallNoError(SB),NOSPLIT,$0-24 MOVW trap+0(FP), R7 // syscall entry MOVW a1+4(FP), R0 MOVW a2+8(FP), R1 MOVW a3+12(FP), R2 SWI $0 MOVW R0, r1+16(FP) MOVW $0, R0 MOVW R0, r2+20(FP) RET