| // Copyright 2009 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. |
| |
| // TODO(rsc): Rewrite all nn(SP) references into name+(nn-8)(FP) |
| // so that go vet can check that they are correct. |
| |
| #include "textflag.h" |
| #include "funcdata.h" |
| |
| // |
| // System call support for AMD64, FreeBSD |
| // |
| |
| // The SYSCALL variant for invoking system calls is broken in FreeBSD. |
| // See comment at top of ../runtime/sys_freebsd_amd64.c and |
| // golang.org/issue/6372. |
| #define SYSCALL MOVQ R10, CX; INT $0x80 |
| |
| // func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64); |
| // func Syscall6(trap int64, a1, a2, a3, a4, a5, a6 int64) (r1, r2, err int64); |
| // func Syscall9(trap int64, a1, a2, a3, a4, a5, a6, a7, a8, a9 int64) (r1, r2, err int64) |
| // Trap # in AX, args in DI SI DX, return in AX DX |
| |
| TEXT ·Syscall(SB),NOSPLIT,$0-56 |
| CALL runtime·entersyscall(SB) |
| MOVQ 16(SP), DI |
| MOVQ 24(SP), SI |
| MOVQ 32(SP), DX |
| MOVQ $0, R10 |
| MOVQ $0, R8 |
| MOVQ $0, R9 |
| MOVQ 8(SP), AX // syscall entry |
| SYSCALL |
| JCC ok |
| MOVQ $-1, 40(SP) // r1 |
| MOVQ $0, 48(SP) // r2 |
| MOVQ AX, 56(SP) // errno |
| CALL runtime·exitsyscall(SB) |
| RET |
| ok: |
| MOVQ AX, 40(SP) // r1 |
| MOVQ DX, 48(SP) // r2 |
| MOVQ $0, 56(SP) // errno |
| CALL runtime·exitsyscall(SB) |
| RET |
| |
| TEXT ·Syscall6(SB),NOSPLIT,$0-80 |
| CALL runtime·entersyscall(SB) |
| MOVQ 16(SP), DI |
| MOVQ 24(SP), SI |
| MOVQ 32(SP), DX |
| MOVQ 40(SP), R10 |
| MOVQ 48(SP), R8 |
| MOVQ 56(SP), R9 |
| MOVQ 8(SP), AX // syscall entry |
| SYSCALL |
| JCC ok6 |
| MOVQ $-1, 64(SP) // r1 |
| MOVQ $0, 72(SP) // r2 |
| MOVQ AX, 80(SP) // errno |
| CALL runtime·exitsyscall(SB) |
| RET |
| ok6: |
| MOVQ AX, 64(SP) // r1 |
| MOVQ DX, 72(SP) // r2 |
| MOVQ $0, 80(SP) // errno |
| CALL runtime·exitsyscall(SB) |
| RET |
| |
| TEXT ·Syscall9(SB),NOSPLIT,$0-104 |
| CALL runtime·entersyscall(SB) |
| MOVQ 8(SP), AX |
| MOVQ 16(SP), DI |
| MOVQ 24(SP), SI |
| MOVQ 32(SP), DX |
| MOVQ 40(SP), R10 |
| MOVQ 48(SP), R8 |
| MOVQ 56(SP), R9 |
| |
| // shift around the last three arguments so they're at the |
| // top of the stack when the syscall is called. |
| MOVQ 64(SP), R11 // arg 7 |
| MOVQ R11, 8(SP) |
| MOVQ 72(SP), R11 // arg 8 |
| MOVQ R11, 16(SP) |
| MOVQ 80(SP), R11 // arg 9 |
| MOVQ R11, 24(SP) |
| |
| SYSCALL |
| JCC ok9 |
| MOVQ $-1, 88(SP) // r1 |
| MOVQ $0, 96(SP) // r2 |
| MOVQ AX, 104(SP) // errno |
| CALL runtime·exitsyscall(SB) |
| RET |
| ok9: |
| MOVQ AX, 88(SP) // r1 |
| MOVQ DX, 96(SP) // r2 |
| MOVQ $0, 104(SP) // errno |
| CALL runtime·exitsyscall(SB) |
| RET |
| |
| TEXT ·RawSyscall(SB),NOSPLIT,$0-56 |
| MOVQ 16(SP), DI |
| MOVQ 24(SP), SI |
| MOVQ 32(SP), DX |
| MOVQ $0, R10 |
| MOVQ $0, R8 |
| MOVQ $0, R9 |
| MOVQ 8(SP), AX // syscall entry |
| SYSCALL |
| JCC ok1 |
| MOVQ $-1, 40(SP) // r1 |
| MOVQ $0, 48(SP) // r2 |
| MOVQ AX, 56(SP) // errno |
| RET |
| ok1: |
| MOVQ AX, 40(SP) // r1 |
| MOVQ DX, 48(SP) // r2 |
| MOVQ $0, 56(SP) // errno |
| RET |
| |
| TEXT ·RawSyscall6(SB),NOSPLIT,$0-80 |
| MOVQ 16(SP), DI |
| MOVQ 24(SP), SI |
| MOVQ 32(SP), DX |
| MOVQ 40(SP), R10 |
| MOVQ 48(SP), R8 |
| MOVQ 56(SP), R9 |
| MOVQ 8(SP), AX // syscall entry |
| SYSCALL |
| JCC ok2 |
| MOVQ $-1, 64(SP) // r1 |
| MOVQ $0, 72(SP) // r2 |
| MOVQ AX, 80(SP) // errno |
| RET |
| ok2: |
| MOVQ AX, 64(SP) // r1 |
| MOVQ DX, 72(SP) // r2 |
| MOVQ $0, 80(SP) // errno |
| RET |
