#include <elf.h> #include "libc.h" void __init_tls(size_t *); void __init_security(size_t *); void __init_ldso_ctors(void); #ifndef SHARED static void dummy() {} weak_alias(dummy, _init); extern void (*const __init_array_start)() __attribute__((weak)); extern void (*const __init_array_end)() __attribute__((weak)); #endif #define AUX_CNT 38 extern size_t __hwcap, __sysinfo; extern char *__progname, *__progname_full; void __init_libc(char **envp, char *pn) { size_t i, *auxv, aux[AUX_CNT] = { 0 }; __environ = envp; for (i=0; envp[i]; i++); libc.auxv = auxv = (void *)(envp+i+1); for (i=0; auxv[i]; i+=2) if (auxv[i]<AUX_CNT) aux[auxv[i]] = auxv[i+1]; __hwcap = aux[AT_HWCAP]; __sysinfo = aux[AT_SYSINFO]; libc.page_size = aux[AT_PAGESZ]; if (pn) { __progname = __progname_full = pn; for (i=0; pn[i]; i++) if (pn[i]=='/') __progname = pn+i+1; } __init_tls(aux); __init_security(aux); } int __libc_start_main(int (*main)(int,char **,char **), int argc, char **argv) { char **envp = argv+argc+1; #ifndef SHARED __init_libc(envp, argv[0]); _init(); uintptr_t a = (uintptr_t)&__init_array_start; for (; a<(uintptr_t)&__init_array_end; a+=sizeof(void(*)())) (*(void (**)())a)(); #endif /* Pass control to to application */ exit(main(argc, argv, envp)); return 0; }