diff options
Diffstat (limited to 'src/syscall/asm_openbsd_mips64.s')
| -rw-r--r-- | src/syscall/asm_openbsd_mips64.s | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/src/syscall/asm_openbsd_mips64.s b/src/syscall/asm_openbsd_mips64.s new file mode 100644 index 0000000..2a4532d --- /dev/null +++ b/src/syscall/asm_openbsd_mips64.s @@ -0,0 +1,129 @@ +// 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 ·Syscall(SB),NOSPLIT,$0-56 + JAL runtime·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·exitsyscall(SB) + RET +ok: + MOVV R2, r1+32(FP) // r1 + MOVV R3, r2+40(FP) // r2 + MOVV R0, err+48(FP) // errno + JAL runtime·exitsyscall(SB) + RET + +TEXT ·Syscall6(SB),NOSPLIT,$0-80 + JAL runtime·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·exitsyscall(SB) + RET +ok6: + MOVV R2, r1+56(FP) // r1 + MOVV R3, r2+64(FP) // r2 + MOVV R0, err+72(FP) // errno + JAL runtime·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 ·Syscall9(SB),NOSPLIT,$0-104 + JAL runtime·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·exitsyscall(SB) + RET +ok9: + MOVV R2, r1+80(FP) // r1 + MOVV R3, r2+88(FP) // r2 + MOVV R0, err+96(FP) // errno + CALL runtime·exitsyscall(SB) + RET + +TEXT ·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 ·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 |