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| author | Ondřej Surý <ondrej@sury.org> | 2011-01-17 12:40:45 +0100 |
|---|---|---|
| committer | Ondřej Surý <ondrej@sury.org> | 2011-01-17 12:40:45 +0100 |
| commit | 3e45412327a2654a77944249962b3652e6142299 (patch) | |
| tree | bc3bf69452afa055423cbe0c5cfa8ca357df6ccf /src/pkg/syscall/asm_linux_arm.s | |
| parent | c533680039762cacbc37db8dc7eed074c3e497be (diff) | |
| download | golang-upstream/2011.01.12.tar.gz | |
Imported Upstream version 2011.01.12upstream/2011.01.12
Diffstat (limited to 'src/pkg/syscall/asm_linux_arm.s')
| -rw-r--r-- | src/pkg/syscall/asm_linux_arm.s | 78 |
1 files changed, 73 insertions, 5 deletions
diff --git a/src/pkg/syscall/asm_linux_arm.s b/src/pkg/syscall/asm_linux_arm.s index 830d41c78..04dbdb624 100644 --- a/src/pkg/syscall/asm_linux_arm.s +++ b/src/pkg/syscall/asm_linux_arm.s @@ -17,9 +17,21 @@ TEXT ·Syscall(SB),7,$0 MOVW 12(SP), R1 MOVW 16(SP), R2 SWI $0 - MOVW R0, 20(SP) // r1 - MOVW R1, 24(SP) // r2 + MOVW $0xfffff001, R1 + CMP R1, R0 + BLS ok + MOVW $-1, R1 + MOVW R1, 20(SP) // r1 + MOVW $0, R2 + MOVW R2, 24(SP) // r2 + RSB $0, R0, R0 + MOVW R0, 28(SP) // errno + BL runtime·exitsyscall(SB) + RET +ok: + MOVW R0, 20(SP) // r1 MOVW $0, R0 + MOVW R0, 24(SP) // r2 MOVW R0, 28(SP) // errno BL runtime·exitsyscall(SB) RET @@ -36,13 +48,57 @@ TEXT ·Syscall6(SB),7,$0 MOVW 24(SP), R4 MOVW 28(SP), R5 SWI $0 - MOVW R0, 32(SP) // r1 + MOVW $0xfffff001, R6 + CMP R6, R0 + BLS ok6 + MOVW $-1, R1 + MOVW R1, 32(SP) // r1 + MOVW $0, R2 + MOVW R2, 36(SP) // r2 + RSB $0, R0, R0 + MOVW R0, 40(SP) // errno + BL runtime·exitsyscall(SB) + RET +ok6: + MOVW R0, 32(SP) // r1 MOVW R1, 36(SP) // r2 MOVW $0, R0 MOVW R0, 40(SP) // errno BL runtime·exitsyscall(SB) 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),7,$0 + BL runtime·entersyscall(SB) + MOVW $SYS__LLSEEK, R7 // syscall entry + MOVW 4(SP), R0 // fd + MOVW 12(SP), R1 // offset-high + MOVW 8(SP), R2 // offset-low + MOVW $20(SP), R3 + MOVW 16(SP), R4 // whence + SWI $0 + MOVW $0xfffff001, R6 + CMP R6, R0 + BLS okseek + MOVW $0, R1 + MOVW R1, 20(SP) + MOVW R1, 24(SP) + RSB $0, R0, R0 + MOVW R0, 28(SP) // errno + BL runtime·exitsyscall(SB) + RET +okseek: + // system call filled in newoffset already + MOVW $0, R0 + MOVW R0, 28(SP) // errno + BL runtime·exitsyscall(SB) + RET + // func RawSyscall(trap uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr); TEXT ·RawSyscall(SB),7,$0 MOVW 4(SP), R7 // syscall entry @@ -50,8 +106,20 @@ TEXT ·RawSyscall(SB),7,$0 MOVW 12(SP), R1 MOVW 16(SP), R2 SWI $0 - MOVW R0, 20(SP) // r1 - MOVW R1, 24(SP) // r2 + MOVW $0xfffff001, R1 + CMP R1, R0 + BLS ok1 + MOVW $-1, R1 + MOVW R1, 20(SP) // r1 + MOVW $0, R2 + MOVW R2, 24(SP) // r2 + RSB $0, R0, R0 + MOVW R0, 28(SP) // errno + RET +ok1: + MOVW R0, 20(SP) // r1 MOVW $0, R0 + MOVW R0, 24(SP) // r2 MOVW R0, 28(SP) // errno RET + |