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
|
/* Copyright (C) 1998,2000,01,02 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdlib.h>
#include <unistd.h>
#include <ldsodefs.h>
#include <bp-start.h>
#include <bp-sym.h>
extern void __libc_init_first (int argc, char **argv, char **envp);
extern int _dl_starting_up;
weak_extern (_dl_starting_up)
extern int __libc_multiple_libcs;
extern void *__libc_stack_end;
struct startup_info
{
void *__unbounded sda_base;
int (*main) (int, char **, char **, void *);
int (*init) (int, char **, char **, void *);
void (*fini) (void);
};
int
/* GKM FIXME: GCC: this should get __BP_ prefix by virtue of the
BPs in the arglist of startup_info.main and startup_info.init. */
BP_SYM (__libc_start_main) (int argc, char *__unbounded *__unbounded ubp_av,
char *__unbounded *__unbounded ubp_ev,
void *__unbounded auxvec, void (*rtld_fini) (void),
struct startup_info *__unbounded stinfo,
char *__unbounded *__unbounded stack_on_entry)
{
#if __BOUNDED_POINTERS__
char **argv;
#else
# define argv ubp_av
#endif
#ifndef SHARED
/* The next variable is only here to work around a bug in gcc <= 2.7.2.2.
If the address would be taken inside the expression the optimizer
would try to be too smart and throws it away. Grrr. */
int *dummy_addr = &_dl_starting_up;
__libc_multiple_libcs = dummy_addr && !_dl_starting_up;
#endif
/* the PPC SVR4 ABI says that the top thing on the stack will
be a NULL pointer, so if not we assume that we're being called
as a statically-linked program by Linux... */
if (*stack_on_entry != NULL)
{
/* ...in which case, we have argc as the top thing on the
stack, followed by argv (NULL-terminated), envp (likewise),
and the auxilary vector. */
argc = *(int *__unbounded) stack_on_entry;
ubp_av = stack_on_entry + 1;
ubp_ev = ubp_av + argc + 1;
#ifdef HAVE_AUX_VECTOR
auxvec = ubp_ev;
while (*(char *__unbounded *__unbounded) auxvec != NULL)
++auxvec;
++auxvec;
# ifndef SHARED
_dl_aux_init ((ElfW(auxv_t) *) auxvec);
# endif
#endif
rtld_fini = NULL;
}
INIT_ARGV_and_ENVIRON;
/* Store something that has some relationship to the end of the
stack, for backtraces. This variable should be thread-specific. */
__libc_stack_end = stack_on_entry + 4;
/* Register the destructor of the dynamic linker if there is any. */
if (rtld_fini != NULL)
__cxa_atexit ((void (*) (void *)) rtld_fini, NULL, NULL);
/* Call the initializer of the libc. */
#ifdef SHARED
if (__builtin_expect (_dl_debug_mask & DL_DEBUG_IMPCALLS, 0))
_dl_debug_printf ("\ninitialize libc\n\n");
#endif
__libc_init_first (argc, argv, __environ);
/* Register the destructor of the program, if any. */
if (stinfo->fini)
__cxa_atexit ((void (*) (void *)) stinfo->fini, NULL, NULL);
/* Call the initializer of the program, if any. */
#ifdef SHARED
if (__builtin_expect (_dl_debug_mask & DL_DEBUG_IMPCALLS, 0))
_dl_debug_printf ("\ninitialize program: %s\n\n", argv[0]);
#endif
if (stinfo->init)
stinfo->init (argc, argv, __environ, auxvec);
#ifdef SHARED
if (__builtin_expect (_dl_debug_mask & DL_DEBUG_IMPCALLS, 0))
_dl_debug_printf ("\ntransferring control: %s\n\n", argv[0]);
#endif
exit (stinfo->main (argc, argv, __environ, auxvec));
}
|
