| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| /* |
| * Generic syscall call. |
| * Upon entry: |
| * %rax: system call number |
| * %rdi: arg0 to system call |
| * %rsi: arg1 |
| * %rdx: arg2 |
| * %rcx: arg3 - syscall expects it at %r10 |
| * %r8: arg4 |
| * %r9: arg5 |
| */ |
| |
| #include <private/bionic_asm.h> |
| |
| ENTRY(syscall) |
| # All arguments are passed via registers. |
| # (Not all will be valid, depending on the syscall.) |
| mov %edi, %eax |
| mov %rsi, %rdi |
| mov %rdx, %rsi |
| mov %rcx, %rdx |
| mov %r8, %r10 |
| mov %r9, %r8 |
| mov 8(%rsp), %r9 |
| |
| # Make the system call. |
| syscall |
| cmpq $-MAX_ERRNO, %rax |
| jb 1f |
| negl %eax |
| movl %eax, %edi |
| call __set_errno_internal |
| 1: |
| ret |
| END(syscall) |
