File size: 2,914 Bytes
04dc9f2 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | // Copyright 2020 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"
// func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64);
TEXT 路Syscall(SB),NOSPLIT,$0-56
JAL runtime路entersyscall(SB)
MOVV a1+8(FP), R4
MOVV a2+16(FP), R5
MOVV a3+24(FP), R6
MOVV R0, R7
MOVV R0, R8
MOVV R0, R9
MOVV trap+0(FP), R2 // syscall entry
SYSCALL
BEQ R7, ok
MOVV $-1, R1
MOVV R1, r1+32(FP) // r1
MOVV R0, r2+40(FP) // r2
MOVV R2, err+48(FP) // errno
JAL runtime路exitsyscall(SB)
RET
ok:
MOVV R2, r1+32(FP) // r1
MOVV R3, r2+40(FP) // r2
MOVV R0, err+48(FP) // errno
JAL runtime路exitsyscall(SB)
RET
TEXT 路Syscall6(SB),NOSPLIT,$0-80
JAL runtime路entersyscall(SB)
MOVV a1+8(FP), R4
MOVV a2+16(FP), R5
MOVV a3+24(FP), R6
MOVV a4+32(FP), R7
MOVV a5+40(FP), R8
MOVV a6+48(FP), R9
MOVV trap+0(FP), R2 // syscall entry
SYSCALL
BEQ R7, ok6
MOVV $-1, R1
MOVV R1, r1+56(FP) // r1
MOVV R0, r2+64(FP) // r2
MOVV R2, err+72(FP) // errno
JAL runtime路exitsyscall(SB)
RET
ok6:
MOVV R2, r1+56(FP) // r1
MOVV R3, r2+64(FP) // r2
MOVV R0, err+72(FP) // errno
JAL runtime路exitsyscall(SB)
RET
// func Syscall9(trap int64, a1, a2, a3, a4, a5, a6, a7, a8, a9 int64) (r1, r2, err int64);
// The openbsd/mips64 kernel only accepts eight syscall arguments, except
// for SYS_syscall, where an additional argument can be passed on the stack.
TEXT 路Syscall9(SB),NOSPLIT,$0-104
JAL runtime路entersyscall(SB)
MOVV num+0(FP), R2 // syscall entry
MOVV a1+8(FP), R4
MOVV a2+16(FP), R5
MOVV a3+24(FP), R6
MOVV a4+32(FP), R7
MOVV a5+40(FP), R8
MOVV a6+48(FP), R9
MOVV a7+56(FP), R10
MOVV a8+64(FP), R11
MOVV a9+72(FP), R12
SUBVU $16, R29
MOVV R12, 0(R29) // arg 9 - only used for SYS_syscall.
SYSCALL
ADDV $16, R29
BEQ R7, ok9
MOVV $-1, R1
MOVV R1, r1+80(FP) // r1
MOVV R0, r2+88(FP) // r2
MOVV R2, err+96(FP) // errno
JAL runtime路exitsyscall(SB)
RET
ok9:
MOVV R2, r1+80(FP) // r1
MOVV R3, r2+88(FP) // r2
MOVV R0, err+96(FP) // errno
CALL runtime路exitsyscall(SB)
RET
TEXT 路RawSyscall(SB),NOSPLIT,$0-56
MOVV a1+8(FP), R4
MOVV a2+16(FP), R5
MOVV a3+24(FP), R6
MOVV R0, R7
MOVV R0, R8
MOVV R0, R9
MOVV trap+0(FP), R2 // syscall entry
SYSCALL
BEQ R7, ok1
MOVV $-1, R1
MOVV R1, r1+32(FP) // r1
MOVV R0, r2+40(FP) // r2
MOVV R2, err+48(FP) // errno
RET
ok1:
MOVV R2, r1+32(FP) // r1
MOVV R3, r2+40(FP) // r2
MOVV R0, err+48(FP) // errno
RET
TEXT 路RawSyscall6(SB),NOSPLIT,$0-80
MOVV a1+8(FP), R4
MOVV a2+16(FP), R5
MOVV a3+24(FP), R6
MOVV a4+32(FP), R7
MOVV a5+40(FP), R8
MOVV a6+48(FP), R9
MOVV trap+0(FP), R2 // syscall entry
SYSCALL
BEQ R7, ok2
MOVV $-1, R1
MOVV R1, r1+56(FP) // r1
MOVV R0, r2+64(FP) // r2
MOVV R2, err+72(FP) // errno
RET
ok2:
MOVV R2, r1+56(FP) // r1
MOVV R3, r2+64(FP) // r2
MOVV R0, err+72(FP) // errno
RET
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