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// 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. //go:build freebsd || netbsd #include "textflag.h" #include "funcdata.h" // // System call support for some 386 unixes // // func Syscall(trap int32, a1, a2, a3 int32) (r1, r2, err int32); // func Syscall6(trap int32, a1, a2, a3, a4, a5, a6 int32) (r1, r2, err int32); // Trap # in AX, args on stack above caller pc. TEXT ·Syscall(SB),NOSPLIT,$0-28 CALL runtime·entersyscall(SB) MOVL trap+0(FP), AX // syscall entry // slide args down on top of system call number LEAL a1+4(FP), SI LEAL trap+0(FP), DI CLD MOVSL MOVSL MOVSL INT $0x80 JAE ok MOVL $-1, r1+16(FP) // r1 MOVL $-1, r2+20(FP) // r2 MOVL AX, err+24(FP) // errno CALL runtime·exitsyscall(SB) RET ok: MOVL AX, r1+16(FP) // r1 MOVL DX, r2+20(FP) // r2 MOVL $0, err+24(FP) // errno CALL runtime·exitsyscall(SB) RET TEXT ·Syscall6(SB),NOSPLIT,$0-40 CALL runtime·entersyscall(SB) MOVL trap+0(FP), AX // syscall entry // slide args down on top of system call number LEAL a1+4(FP), SI LEAL trap+0(FP), DI CLD MOVSL MOVSL MOVSL MOVSL MOVSL MOVSL INT $0x80 JAE ok6 MOVL $-1, r1+28(FP) // r1 MOVL $-1, r2+32(FP) // r2 MOVL AX, err+36(FP) // errno CALL runtime·exitsyscall(SB) RET ok6: MOVL AX, r1+28(FP) // r1 MOVL DX, r2+32(FP) // r2 MOVL $0, err+36(FP) // errno CALL runtime·exitsyscall(SB) RET TEXT ·Syscall9(SB),NOSPLIT,$0-52 CALL runtime·entersyscall(SB) MOVL num+0(FP), AX // syscall entry // slide args down on top of system call number LEAL a1+4(FP), SI LEAL num+0(FP), DI CLD MOVSL MOVSL MOVSL MOVSL MOVSL MOVSL MOVSL MOVSL MOVSL INT $0x80 JAE ok9 MOVL $-1, r1+40(FP) // r1 MOVL $-1, r2+44(FP) // r2 MOVL AX, err+48(FP) // errno CALL runtime·exitsyscall(SB) RET ok9: MOVL AX, r1+40(FP) // r1 MOVL DX, r2+44(FP) // r2 MOVL $0, err+48(FP) // errno CALL runtime·exitsyscall(SB) RET TEXT ·RawSyscall(SB),NOSPLIT,$0-28 MOVL trap+0(FP), AX // syscall entry // slide args down on top of system call number LEAL a1+4(FP), SI LEAL trap+0(FP), DI CLD MOVSL MOVSL MOVSL INT $0x80 JAE ok1 MOVL $-1, r1+16(FP) // r1 MOVL $-1, r2+20(FP) // r2 MOVL AX, err+24(FP) // errno RET ok1: MOVL AX, r1+16(FP) // r1 MOVL DX, r2+20(FP) // r2 MOVL $0, err+24(FP) // errno RET TEXT ·RawSyscall6(SB),NOSPLIT,$0-40 MOVL trap+0(FP), AX // syscall entry // slide args down on top of system call number LEAL a1+4(FP), SI LEAL trap+0(FP), DI CLD MOVSL MOVSL MOVSL MOVSL MOVSL MOVSL INT $0x80 JAE ok2 MOVL $-1, r1+28(FP) // r1 MOVL $-1, r2+32(FP) // r2 MOVL AX, err+36(FP) // errno RET ok2: MOVL AX, r1+28(FP) // r1 MOVL DX, r2+32(FP) // r2 MOVL $0, err+36(FP) // errno RET