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syscall: remove more NxM assumptions on Plan 9 

LGTM=0intro, r
R=0intro, r
CC=ality, dave, golang-codereviews, jas, mischief, rsc
https://golang.org/cl/111910043
This commit is contained in:
Aram Hăvărneanu 2014-07-09 12:32:18 +02:00
parent a6cc634766
commit 38e75f9d0e
1 changed files with 0 additions and 8 deletions
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8
src/pkg/syscall/asm_plan9_amd64.s
View File

@ -16,12 +16,8 @@
//func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) //func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
//func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) //func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
// Trap # in BP, args on stack above caller pc.
// NxM requires that Plan 9 system calls be
// marked with $0x8000 in AX.
TEXT ·Syscall(SB),NOSPLIT,$0-64 TEXT ·Syscall(SB),NOSPLIT,$0-64
CALL runtime·entersyscall(SB) CALL runtime·entersyscall(SB)
MOVQ $0x8000, AX // for NxM
MOVQ 8(SP), BP // syscall entry MOVQ 8(SP), BP // syscall entry
// slide args down on top of system call number // slide args down on top of system call number
LEAQ 16(SP), SI LEAQ 16(SP), SI
@ -57,7 +53,6 @@ copyresult3:
TEXT ·Syscall6(SB),NOSPLIT,$0-88 TEXT ·Syscall6(SB),NOSPLIT,$0-88
CALL runtime·entersyscall(SB) CALL runtime·entersyscall(SB)
MOVQ $0x8000, AX // for NxM
MOVQ 8(SP), BP // syscall entry MOVQ 8(SP), BP // syscall entry
// slide args down on top of system call number // slide args down on top of system call number
LEAQ 16(SP), SI LEAQ 16(SP), SI
@ -95,7 +90,6 @@ copyresult4:
RET RET
TEXT ·RawSyscall(SB),NOSPLIT,$0-56 TEXT ·RawSyscall(SB),NOSPLIT,$0-56
MOVQ $0x8000, AX // for NxM
MOVQ 8(SP), BP // syscall entry MOVQ 8(SP), BP // syscall entry
// slide args down on top of system call number // slide args down on top of system call number
LEAQ 16(SP), SI LEAQ 16(SP), SI
@ -111,7 +105,6 @@ TEXT ·RawSyscall(SB),NOSPLIT,$0-56
RET RET
TEXT ·RawSyscall6(SB),NOSPLIT,$0-80 TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
MOVQ $0x8000, AX // for NxM
MOVQ 8(SP), BP // syscall entry MOVQ 8(SP), BP // syscall entry
// slide args down on top of system call number // slide args down on top of system call number
LEAQ 16(SP), SI LEAQ 16(SP), SI
@ -136,7 +129,6 @@ TEXT ·seek(SB),NOSPLIT,$0-56
LEAQ newoffset+40(SP), AX LEAQ newoffset+40(SP), AX
MOVQ AX, placeholder+8(SP) MOVQ AX, placeholder+8(SP)
MOVQ $0x8000, AX // for NxM
MOVQ $SYS_SEEK, BP // syscall entry MOVQ $SYS_SEEK, BP // syscall entry
SYSCALL SYSCALL