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b168057a | 1 | /* Copyright (C) 2001-2015 Free Software Foundation, Inc. |
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2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
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17 | |
18 | #include <sysdep.h> | |
19 | ||
20 | /* Please consult the file sysdeps/unix/sysv/linux/x86-64/sysdep.h for | |
21 | more information about the value -4095 used below. */ | |
22 | ||
1f15e19f | 23 | /* Usage: long syscall (syscall_number, arg1, arg2, arg3, arg4, arg5, arg6) |
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24 | We need to do some arg shifting, the syscall_number will be in |
25 | rax. */ | |
26 | ||
27 | ||
28 | .text | |
29 | ENTRY (syscall) | |
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30 | movq %rdi, %rax /* Syscall number -> rax. */ |
31 | movq %rsi, %rdi /* shift arg1 - arg5. */ | |
32 | movq %rdx, %rsi | |
33 | movq %rcx, %rdx | |
34 | movq %r8, %r10 | |
35 | movq %r9, %r8 | |
1f15e19f | 36 | movq 8(%rsp),%r9 /* arg6 is on the stack. */ |
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37 | syscall /* Do the system call. */ |
38 | cmpq $-4095, %rax /* Check %rax for error. */ | |
39 | jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */ | |
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40 | ret /* Return to caller. */ |
41 | ||
42 | PSEUDO_END (syscall) |