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
|
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#ifdef __APPLE__
#include <mach/mach.h>
#include <mach-o/dyld_images.h>
#else
#include <sys/wait.h>
#include <sys/personality.h>
#endif
#include "frida-gum.h"
#include "config.h"
#include "debug.h"
#include "entry.h"
#include "instrument.h"
#include "interceptor.h"
#include "lib.h"
#include "output.h"
#include "persistent.h"
#include "prefetch.h"
#include "ranges.h"
#include "stalker.h"
#include "stats.h"
#include "util.h"
#ifdef __APPLE__
extern mach_port_t mach_task_self();
extern GumAddress gum_darwin_find_entrypoint(mach_port_t task);
#else
extern int __libc_start_main(int *(main)(int, char **, char **), int argc,
char **ubp_av, void (*init)(void),
void (*fini)(void), void (*rtld_fini)(void),
void(*stack_end));
#endif
typedef int *(*main_fn_t)(int argc, char **argv, char **envp);
static main_fn_t main_fn = NULL;
static int on_fork(void) {
prefetch_read();
return fork();
}
#ifdef __APPLE__
static void on_main_os(int argc, char **argv, char **envp) {
UNUSED_PARAMETER(argc);
UNUSED_PARAMETER(argv);
UNUSED_PARAMETER(envp);
}
#else
static void on_main_os(int argc, char **argv, char **envp) {
UNUSED_PARAMETER(argc);
/* Personality doesn't affect the current process, it only takes effect on
* evec */
int persona = personality(ADDR_NO_RANDOMIZE);
if (persona == -1) { WARNF("Failed to set ADDR_NO_RANDOMIZE: %d", errno); }
if ((persona & ADDR_NO_RANDOMIZE) == 0) { execvpe(argv[0], argv, envp); }
GumInterceptor *interceptor = gum_interceptor_obtain();
gum_interceptor_begin_transaction(interceptor);
gum_interceptor_revert(interceptor, __libc_start_main);
gum_interceptor_end_transaction(interceptor);
gum_interceptor_flush(interceptor);
}
#endif
static void embedded_init() {
static gboolean initialized = false;
if (!initialized) {
gum_init_embedded();
initialized = true;
}
}
void afl_frida_start() {
embedded_init();
stalker_init();
lib_init();
entry_init();
instrument_init();
output_init();
persistent_init();
prefetch_init();
ranges_init();
stats_init();
void *fork_addr =
GSIZE_TO_POINTER(gum_module_find_export_by_name(NULL, "fork"));
intercept(fork_addr, on_fork, NULL);
stalker_start();
entry_run();
}
static int *on_main(int argc, char **argv, char **envp) {
on_main_os(argc, argv, envp);
unintercept_self();
afl_frida_start();
return main_fn(argc, argv, envp);
}
#if defined(EMBEDDED)
extern int *main(int argc, char **argv, char **envp);
static void intercept_main(void) {
main_fn = main;
intercept(main, on_main, NULL);
}
#elif defined(__APPLE__)
static void intercept_main(void) {
mach_port_t task = mach_task_self();
OKF("Task Id: %u", task);
GumAddress entry = gum_darwin_find_entrypoint(task);
OKF("Entry Point: 0x%016" G_GINT64_MODIFIER "x", entry);
void *main = GSIZE_TO_POINTER(entry);
main_fn = main;
intercept(main, on_main, NULL);
}
#else
static int on_libc_start_main(int *(main)(int, char **, char **), int argc,
char **ubp_av, void (*init)(void),
void (*fini)(void), void (*rtld_fini)(void),
void(*stack_end)) {
main_fn = main;
unintercept_self();
intercept(main, on_main, NULL);
return __libc_start_main(main, argc, ubp_av, init, fini, rtld_fini,
stack_end);
}
static void intercept_main(void) {
intercept(__libc_start_main, on_libc_start_main, NULL);
}
#endif
__attribute__((constructor)) static void init(void) {
embedded_init();
intercept_main();
}
|
