1
2/*--------------------------------------------------------------------*/
3/*--- Doing system calls.                       pub_core_syscall.h ---*/
4/*--------------------------------------------------------------------*/
5
6/*
7   This file is part of Valgrind, a dynamic binary instrumentation
8   framework.
9
10   Copyright (C) 2000-2013 Julian Seward
11      jseward@acm.org
12
13   This program is free software; you can redistribute it and/or
14   modify it under the terms of the GNU General Public License as
15   published by the Free Software Foundation; either version 2 of the
16   License, or (at your option) any later version.
17
18   This program is distributed in the hope that it will be useful, but
19   WITHOUT ANY WARRANTY; without even the implied warranty of
20   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
21   General Public License for more details.
22
23   You should have received a copy of the GNU General Public License
24   along with this program; if not, write to the Free Software
25   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
26   02111-1307, USA.
27
28   The GNU General Public License is contained in the file COPYING.
29*/
30
31#ifndef __PUB_CORE_SYSCALL_H
32#define __PUB_CORE_SYSCALL_H
33
34#include "pub_core_basics.h"   // VG_ macro
35
36//--------------------------------------------------------------------
37// PURPOSE: This module contains the code for actually executing syscalls.
38//--------------------------------------------------------------------
39
40/* Do a syscall on this platform, with 8 args, and return the result
41   in canonical format in a SysRes value. */
42
43// We use a full prototype for VG_(do_syscall) rather than "..." to ensure
44// that all arguments get converted to a UWord appropriately.  Not doing so
45// can cause problems when passing 32-bit integers on 64-bit platforms,
46// because the top 32-bits might not be zeroed appropriately, eg. as would
47// happen with the 6th arg on AMD64 which is passed on the stack.
48
49extern SysRes VG_(do_syscall) ( UWord sysno,
50                                UWord, UWord, UWord,
51                                UWord, UWord, UWord,
52                                UWord, UWord );
53
54/* Macros make life easier. */
55
56#define vgPlain_do_syscall0(s)             VG_(do_syscall)((s),0,0,0,0,0,0,0,0)
57#define vgPlain_do_syscall1(s,a)           VG_(do_syscall)((s),(a),\
58                                                           0,0,0,0,0,0,0)
59#define vgPlain_do_syscall2(s,a,b)         VG_(do_syscall)((s),(a),(b),\
60                                                           0,0,0,0,0,0)
61#define vgPlain_do_syscall3(s,a,b,c)       VG_(do_syscall)((s),(a),(b),(c),\
62                                                           0,0,0,0,0)
63#define vgPlain_do_syscall4(s,a,b,c,d)     VG_(do_syscall)((s),(a),(b),(c),\
64                                                           (d),0,0,0,0)
65#define vgPlain_do_syscall5(s,a,b,c,d,e)   VG_(do_syscall)((s),(a),(b),(c),\
66                                                           (d),(e),0,0,0)
67#define vgPlain_do_syscall6(s,a,b,c,d,e,f) VG_(do_syscall)((s),(a),(b),(c),\
68                                                           (d),(e),(f),0,0)
69#define vgPlain_do_syscall7(s,a,b,c,d,e,f,g) VG_(do_syscall)((s),(a),(b),(c),\
70                                                           (d),(e),(f),(g),0)
71#define vgPlain_do_syscall8(s,a,b,c,d,e,f,g,h) VG_(do_syscall)((s),(a),(b),(c),\
72                                                           (d),(e),(f),(g),(h))
73
74extern SysRes VG_(mk_SysRes_x86_linux)   ( Int  val );
75extern SysRes VG_(mk_SysRes_amd64_linux) ( Long val );
76extern SysRes VG_(mk_SysRes_ppc32_linux) ( UInt  val, UInt  cr0so );
77extern SysRes VG_(mk_SysRes_ppc64_linux) ( ULong val, ULong cr0so );
78extern SysRes VG_(mk_SysRes_arm_linux)   ( Int val );
79extern SysRes VG_(mk_SysRes_arm64_linux) ( Long val );
80extern SysRes VG_(mk_SysRes_x86_darwin)  ( UChar scclass, Bool isErr,
81                                           UInt wHI, UInt wLO );
82extern SysRes VG_(mk_SysRes_amd64_darwin)( UChar scclass, Bool isErr,
83                                           ULong wHI, ULong wLO );
84extern SysRes VG_(mk_SysRes_s390x_linux) ( Long val );
85extern SysRes VG_(mk_SysRes_mips32_linux)( UWord v0, UWord v1,
86                                           UWord a3 );
87extern SysRes VG_(mk_SysRes_mips64_linux)( ULong v0, ULong v1,
88                                           ULong a3 );
89extern SysRes VG_(mk_SysRes_Error)       ( UWord val );
90extern SysRes VG_(mk_SysRes_Success)     ( UWord val );
91
92
93
94/* Return a string which gives the name of an error value.  Note,
95   unlike the standard C syserror fn, the returned string is not
96   malloc-allocated or writable -- treat it as a constant. */
97
98extern const HChar* VG_(strerror) ( UWord errnum );
99
100
101#endif   // __PUB_CORE_SYSCALL_H
102
103/*--------------------------------------------------------------------*/
104/*--- end                                                          ---*/
105/*--------------------------------------------------------------------*/
106