9 void __init_tls(size_t *);
11 static void dummy(void) {}
12 weak_alias(dummy, _init);
14 __attribute__((__weak__, __visibility__("hidden")))
15 extern void (*const __init_array_start)(void), (*const __init_array_end)(void);
17 static void dummy1(void *p) {}
18 weak_alias(dummy1, __init_ssp);
22 void __init_libc(char **envp, char *pn)
24 size_t i, *auxv, aux[AUX_CNT] = { 0 };
26 for (i=0; envp[i]; i++);
27 libc.auxv = auxv = (void *)(envp+i+1);
28 for (i=0; auxv[i]; i+=2) if (auxv[i]<AUX_CNT) aux[auxv[i]] = auxv[i+1];
29 __hwcap = aux[AT_HWCAP];
30 __sysinfo = aux[AT_SYSINFO];
31 libc.page_size = aux[AT_PAGESZ];
33 if (!pn) pn = (void*)aux[AT_EXECFN];
35 __progname = __progname_full = pn;
36 for (i=0; pn[i]; i++) if (pn[i]=='/') __progname = pn+i+1;
39 __init_ssp((void *)aux[AT_RANDOM]);
41 if (aux[AT_UID]==aux[AT_EUID] && aux[AT_GID]==aux[AT_EGID]
42 && !aux[AT_SECURE]) return;
44 struct pollfd pfd[3] = { {.fd=0}, {.fd=1}, {.fd=2} };
46 __syscall(SYS_poll, pfd, 3, 0);
48 __syscall(SYS_ppoll, pfd, 3, &(struct timespec){0}, 0, _NSIG/8);
50 for (i=0; i<3; i++) if (pfd[i].revents&POLLNVAL)
51 if (__sys_open("/dev/null", O_RDWR)<0)
56 static void libc_start_init(void)
59 uintptr_t a = (uintptr_t)&__init_array_start;
60 for (; a<(uintptr_t)&__init_array_end; a+=sizeof(void(*)()))
64 weak_alias(libc_start_init, __libc_start_init);
66 int __libc_start_main(int (*main)(int,char **,char **), int argc, char **argv)
68 char **envp = argv+argc+1;
70 __init_libc(envp, argv[0]);
73 /* Pass control to the application */
74 exit(main(argc, argv, envp));