asm_linux_mipsx.s

Documentation: syscall

     1// Copyright 2016 The Go Authors. All rights reserved.
     2// Use of this source code is governed by a BSD-style
     3// license that can be found in the LICENSE file.
     4
     5//go:build linux && (mips || mipsle)
     6
     7#include "textflag.h"
     8#include "funcdata.h"
     9
    10//
    11// System calls for mips, Linux
    12//
    13
    14// func Syscall9(trap trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2, err uintptr);
    15// Actually Syscall8 but the rest of the code expects it to be named Syscall9.
    16TEXT ·Syscall9(SB),NOSPLIT,$28-52
    17	NO_LOCAL_POINTERS
    18	JAL	runtime·entersyscall(SB)
    19	MOVW	a1+4(FP), R4
    20	MOVW	a2+8(FP), R5
    21	MOVW	a3+12(FP), R6
    22	MOVW	a4+16(FP), R7
    23	MOVW	a5+20(FP), R8
    24	MOVW	a6+24(FP), R9
    25	MOVW	a7+28(FP), R10
    26	MOVW	a8+32(FP), R11
    27	MOVW	R8, 16(R29)
    28	MOVW	R9, 20(R29)
    29	MOVW	R10, 24(R29)
    30	MOVW	R11, 28(R29)
    31	MOVW	trap+0(FP), R2	// syscall entry
    32	MOVW	R0, R3	// reset R3 to zero as 1-ret SYSCALL keeps it
    33	SYSCALL
    34	BEQ	R7, ok9
    35	MOVW	$-1, R1
    36	MOVW	R1, r1+40(FP)	// r1
    37	MOVW	R0, r2+44(FP)	// r2
    38	MOVW	R2, err+48(FP)	// errno
    39	JAL	runtime·exitsyscall(SB)
    40	RET
    41ok9:
    42	MOVW	R2, r1+40(FP)	// r1
    43	MOVW	R3, r2+44(FP)	// r2
    44	MOVW	R0, err+48(FP)	// errno
    45	JAL	runtime·exitsyscall(SB)
    46	RET
    47
    48// func rawVforkSyscall(trap, a1, a2, a3 uintptr) (r1, err uintptr)
    49TEXT ·rawVforkSyscall(SB),NOSPLIT|NOFRAME,$0-24
    50	MOVW	a1+4(FP), R4
    51	MOVW	a2+8(FP), R5
    52	MOVW	a3+12(FP), R6
    53	MOVW	trap+0(FP), R2	// syscall entry
    54	SYSCALL
    55	BEQ	R7, ok
    56	MOVW	$-1, R1
    57	MOVW	R1, r1+16(FP)	// r1
    58	MOVW	R2, err+20(FP)	// errno
    59	RET
    60ok:
    61	MOVW	R2, r1+16(FP)	// r1
    62	MOVW	R0, err+20(FP)	// errno
    63	RET
    64
    65TEXT ·rawSyscallNoError(SB),NOSPLIT,$20-24
    66	MOVW	a1+4(FP), R4
    67	MOVW	a2+8(FP), R5
    68	MOVW	a3+12(FP), R6
    69	MOVW	trap+0(FP), R2	// syscall entry
    70	MOVW	R0, R3	// reset R3 to zero as 1-ret SYSCALL keeps it
    71	SYSCALL
    72	MOVW	R2, r1+16(FP)	// r1
    73	MOVW	R3, r2+20(FP)	// r2
    74	RET
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