1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
/* vi: set sw=4 ts=4: */
/*
* Copyright (C) 2000-2005 by Erik Andersen <andersen@codepoet.org>
*
* GNU Lesser General Public License version 2.1 or later.
*/
#ifndef _LD_SYSCALL_H_
#define _LD_SYSCALL_H_
/* Pull in the arch specific syscall implementation */
#include <dl-syscalls.h>
/* For MAP_ANONYMOUS -- differs between platforms */
#define _SYS_MMAN_H 1
#include <bits/mman.h>
/* Pull in whatever this particular arch's kernel thinks the kernel version of
* struct stat should look like. It turns out that each arch has a different
* opinion on the subject, and different kernel revs use different names... */
#if defined(__sparc_v9__) && (__WORDSIZE == 64)
#define kernel_stat64 stat
#else
#define kernel_stat stat
#endif
#include <bits/kernel_stat.h>
#include <bits/kernel_types.h>
/* _dl_open() parameters */
#define O_RDONLY 00
#define O_WRONLY 01
#define O_RDWR 02
#define O_CREAT 0100
/* Encoding of the file mode. */
#define S_IFMT 0170000 /* These bits determine file type. */
/* File types. */
#define S_IFDIR 0040000 /* Directory. */
#define S_IFCHR 0020000 /* Character device. */
#define S_IFBLK 0060000 /* Block device. */
#define S_IFREG 0100000 /* Regular file. */
#define S_IFIFO 0010000 /* FIFO. */
#define S_IFLNK 0120000 /* Symbolic link. */
#define S_IFSOCK 0140000 /* Socket. */
/* Protection bits. */
#define S_ISUID 04000 /* Set user ID on execution. */
#define S_ISGID 02000 /* Set group ID on execution. */
#define S_ISVTX 01000 /* Save swapped text after use (sticky). */
#define S_IREAD 0400 /* Read by owner. */
#define S_IWRITE 0200 /* Write by owner. */
#define S_IEXEC 0100 /* Execute by owner. */
/* Here are the definitions for some syscalls that are used
by the dynamic linker. The idea is that we want to be able
to call these before the errno symbol is dynamicly linked, so
we use our own version here. Note that we cannot assume any
dynamic linking at all, so we cannot return any error codes.
We just punt if there is an error. */
#define __NR__dl_exit __NR_exit
static __always_inline _syscall1(void, _dl_exit, int, status);
#define __NR__dl_close __NR_close
static __always_inline _syscall1(int, _dl_close, int, fd);
#define __NR__dl_open __NR_open
static __always_inline _syscall3(int, _dl_open, const char *, fn, int, flags,
__kernel_mode_t, mode);
#define __NR__dl_write __NR_write
static __always_inline _syscall3(unsigned long, _dl_write, int, fd,
const void *, buf, unsigned long, count);
#define __NR__dl_read __NR_read
static __always_inline _syscall3(unsigned long, _dl_read, int, fd,
const void *, buf, unsigned long, count);
#define __NR__dl_mprotect __NR_mprotect
static __always_inline _syscall3(int, _dl_mprotect, const void *, addr,
unsigned long, len, int, prot);
#define __NR__dl_stat __NR_stat
static __always_inline _syscall2(int, _dl_stat, const char *, file_name,
struct stat *, buf);
#define __NR__dl_fstat __NR_fstat
static __always_inline _syscall2(int, _dl_fstat, int, fd, struct stat *, buf);
#define __NR__dl_munmap __NR_munmap
static __always_inline _syscall2(int, _dl_munmap, void *, start, unsigned long, length);
#ifdef __NR_getxuid
# define __NR_getuid __NR_getxuid
#endif
#define __NR__dl_getuid __NR_getuid
static __always_inline _syscall0(uid_t, _dl_getuid);
#ifndef __NR_geteuid
# define __NR_geteuid __NR_getuid
#endif
#define __NR__dl_geteuid __NR_geteuid
static __always_inline _syscall0(uid_t, _dl_geteuid);
#ifdef __NR_getxgid
# define __NR_getgid __NR_getxgid
#endif
#define __NR__dl_getgid __NR_getgid
static __always_inline _syscall0(gid_t, _dl_getgid);
#ifndef __NR_getegid
# define __NR_getegid __NR_getgid
#endif
#define __NR__dl_getegid __NR_getegid
static __always_inline _syscall0(gid_t, _dl_getegid);
#ifdef __NR_getxpid
# define __NR_getpid __NR_getxpid
#endif
#define __NR__dl_getpid __NR_getpid
static __always_inline _syscall0(gid_t, _dl_getpid);
#define __NR__dl_readlink __NR_readlink
static __always_inline _syscall3(int, _dl_readlink, const char *, path, char *, buf,
size_t, bufsiz);
#ifdef __UCLIBC_HAS_SSP__
# include <sys/time.h>
# define __NR__dl_gettimeofday __NR_gettimeofday
static __always_inline _syscall2(int, _dl_gettimeofday, struct timeval *, tv,
# ifdef __USE_BSD
struct timezone *, tz);
# else
void *, tz);
# endif
#endif
/* handle all the fun mmap intricacies */
#if (defined(__UCLIBC_MMAP_HAS_6_ARGS__) && defined(__NR_mmap)) || !defined(__NR_mmap2)
# define _dl_MAX_ERRNO 4096
# define _dl_mmap_check_error(__res) \
(((long)__res) < 0 && ((long)__res) >= -_dl_MAX_ERRNO)
#else
# define MAP_FAILED ((void *) -1)
# define _dl_mmap_check_error(X) (((void *)X) == MAP_FAILED)
#endif
/* first try mmap(), syscall6() style */
#if defined(__UCLIBC_MMAP_HAS_6_ARGS__) && defined(__NR_mmap)
# define __NR__dl_mmap __NR_mmap
static __always_inline _syscall6(void *, _dl_mmap, void *, start, size_t, length,
int, prot, int, flags, int, fd, off_t, offset);
/* then try mmap2() */
#elif defined(__NR_mmap2)
# define __NR___syscall_mmap2 __NR_mmap2
static __always_inline _syscall6(__ptr_t, __syscall_mmap2, __ptr_t, addr, size_t, len,
int, prot, int, flags, int, fd, off_t, offset);
/* Some architectures always use 12 as page shift for mmap2() eventhough the
* real PAGE_SHIFT != 12. Other architectures use the same value as
* PAGE_SHIFT...
*/
#ifndef MMAP2_PAGE_SHIFT
# define MMAP2_PAGE_SHIFT 12
#endif
static __always_inline void * _dl_mmap(void * addr, unsigned long size, int prot,
int flags, int fd, unsigned long offset)
{
if (offset & ((1 << MMAP2_PAGE_SHIFT) - 1))
return MAP_FAILED;
return __syscall_mmap2(addr, size, prot, flags,
fd, (off_t) (offset >> MMAP2_PAGE_SHIFT));
}
/* finally, fall back to mmap(), syscall1() style */
#elif defined(__NR_mmap)
# define __NR__dl_mmap_real __NR_mmap
static __always_inline _syscall1(void *, _dl_mmap_real, unsigned long *, buffer);
static __always_inline void * _dl_mmap(void * addr, unsigned long size, int prot,
int flags, int fd, unsigned long offset)
{
unsigned long buffer[6];
buffer[0] = (unsigned long) addr;
buffer[1] = (unsigned long) size;
buffer[2] = (unsigned long) prot;
buffer[3] = (unsigned long) flags;
buffer[4] = (unsigned long) fd;
buffer[5] = (unsigned long) offset;
return (void *) _dl_mmap_real(buffer);
}
#else
# error "Your architecture doesn't seem to provide mmap() !?"
#endif
#endif /* _LD_SYSCALL_H_ */
|
