github.com/dorkamotorka/go/src@v0.0.0-20230614113921-187095f0e316/syscall/asm_linux_riscv64.s (about) 1 // Copyright 2019 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 #include "textflag.h" 6 7 // 8 // System calls for riscv64, Linux 9 // 10 11 // func rawVforkSyscall(trap, a1, a2 uintptr) (r1, err uintptr) 12 TEXT ·rawVforkSyscall(SB),NOSPLIT|NOFRAME,$0-40 13 MOV a1+8(FP), A0 14 MOV a2+16(FP), A1 15 MOV ZERO, A2 16 MOV ZERO, A3 17 MOV ZERO, A4 18 MOV ZERO, A5 19 MOV trap+0(FP), A7 // syscall entry 20 ECALL 21 MOV $-4096, T0 22 BLTU T0, A0, err 23 MOV A0, r1+24(FP) // r1 24 MOV ZERO, err+32(FP) // errno 25 RET 26 err: 27 MOV $-1, T0 28 MOV T0, r1+24(FP) // r1 29 SUB A0, ZERO, A0 30 MOV A0, err+32(FP) // errno 31 RET 32 33 TEXT ·rawSyscallNoError(SB),NOSPLIT,$0-48 34 MOV a1+8(FP), A0 35 MOV a2+16(FP), A1 36 MOV a3+24(FP), A2 37 MOV trap+0(FP), A7 // syscall entry 38 ECALL 39 MOV A0, r1+32(FP) 40 MOV A1, r2+40(FP) 41 RET