| // Copyright 2019 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" |
| |
| // |
| // System calls for riscv64, Linux |
| // |
| |
| // func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64) |
| TEXT ·Syscall(SB),NOSPLIT,$0-56 |
| CALL runtime·entersyscall(SB) |
| MOV a1+8(FP), A0 |
| MOV a2+16(FP), A1 |
| MOV a3+24(FP), A2 |
| MOV trap+0(FP), A7 // syscall entry |
| ECALL |
| MOV $-4096, T0 |
| BLTU T0, A0, err |
| MOV A0, r1+32(FP) // r1 |
| MOV A1, r2+40(FP) // r2 |
| MOV $0, err+48(FP) // errno |
| CALL runtime·exitsyscall(SB) |
| RET |
| err: |
| MOV $-1, T0 |
| MOV T0, r1+32(FP) // r1 |
| MOV $0, r2+40(FP) // r2 |
| SUB A0, $0, A0 |
| MOV A0, err+48(FP) // errno |
| CALL runtime·exitsyscall(SB) |
| RET |
| |
| // func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) |
| TEXT ·Syscall6(SB),NOSPLIT,$0-80 |
| CALL runtime·entersyscall(SB) |
| MOV a1+8(FP), A0 |
| MOV a2+16(FP), A1 |
| MOV a3+24(FP), A2 |
| MOV a4+32(FP), A3 |
| MOV a5+40(FP), A4 |
| MOV a6+48(FP), A5 |
| MOV trap+0(FP), A7 // syscall entry |
| ECALL |
| MOV $-4096, T0 |
| BLTU T0, A0, err |
| MOV A0, r1+56(FP) // r1 |
| MOV A1, r2+64(FP) // r2 |
| MOV $0, err+72(FP) // errno |
| CALL runtime·exitsyscall(SB) |
| RET |
| err: |
| MOV $-1, T0 |
| MOV T0, r1+56(FP) // r1 |
| MOV $0, r2+64(FP) // r2 |
| SUB A0, $0, A0 |
| MOV A0, err+72(FP) // errno |
| CALL runtime·exitsyscall(SB) |
| RET |
| |
| // func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) |
| TEXT ·RawSyscall(SB),NOSPLIT,$0-56 |
| MOV a1+8(FP), A0 |
| MOV a2+16(FP), A1 |
| MOV a3+24(FP), A2 |
| MOV trap+0(FP), A7 // syscall entry |
| ECALL |
| MOV $-4096, T0 |
| BLTU T0, A0, err |
| MOV A0, r1+32(FP) // r1 |
| MOV A1, r2+40(FP) // r2 |
| MOV $0, err+48(FP) // errno |
| RET |
| err: |
| MOV $-1, T0 |
| MOV T0, r1+32(FP) // r1 |
| MOV $0, r2+40(FP) // r2 |
| SUB A0, $0, A0 |
| MOV A0, err+48(FP) // errno |
| RET |
| |
| // func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) |
| TEXT ·RawSyscall6(SB),NOSPLIT,$0-80 |
| MOV a1+8(FP), A0 |
| MOV a2+16(FP), A1 |
| MOV a3+24(FP), A2 |
| MOV a4+32(FP), A3 |
| MOV a5+40(FP), A4 |
| MOV a6+48(FP), A5 |
| MOV trap+0(FP), A7 // syscall entry |
| ECALL |
| MOV $-4096, T0 |
| BLTU T0, A0, err |
| MOV A0, r1+56(FP) // r1 |
| MOV A1, r2+64(FP) // r2 |
| MOV $0, err+72(FP) // errno |
| RET |
| err: |
| MOV $-1, T0 |
| MOV T0, r1+56(FP) // r1 |
| MOV $0, r2+64(FP) // r2 |
| SUB A0, $0, A0 |
| MOV A0, err+72(FP) // errno |
| RET |
| |
| TEXT ·rawSyscallNoError(SB),NOSPLIT,$0-48 |
| MOV a1+8(FP), A0 |
| MOV a2+16(FP), A1 |
| MOV a3+24(FP), A2 |
| MOV trap+0(FP), A7 // syscall entry |
| ECALL |
| MOV A0, r1+32(FP) |
| MOV A1, r2+40(FP) |
| RET |