diff options
Diffstat (limited to 'libc/misc/internals/__uClibc_main.c')
| -rw-r--r-- | libc/misc/internals/__uClibc_main.c | 97 |
1 files changed, 27 insertions, 70 deletions
diff --git a/libc/misc/internals/__uClibc_main.c b/libc/misc/internals/__uClibc_main.c index 9dad20efa..c3f8a548c 100644 --- a/libc/misc/internals/__uClibc_main.c +++ b/libc/misc/internals/__uClibc_main.c @@ -25,20 +25,30 @@ #include <fcntl.h> #include <sys/stat.h> #include <sys/sysmacros.h> + +#ifndef SHARED +void *__libc_stack_end=NULL; + +/* probably all the weak_*function stuff below should be in here */ + #ifdef __UCLIBC_HAS_SSP__ -#include <ssp-internal.h> +#include <dl-osinfo.h> +#ifndef THREAD_SET_STACK_GUARD +/* Only exported for architectures that don't store the stack guard canary + * in thread local area. */ #include <stdint.h> - -/* for gcc-3.x + Etoh ssp */ -uintptr_t __guard attribute_relro; /* for gcc-4.1 non-TLS */ uintptr_t __stack_chk_guard attribute_relro; +/* for gcc-3.x + Etoh ssp */ +strong_alias(__stack_chk_guard,__guard) #endif +#endif + +#endif /* !SHARED */ /* * Prototypes. */ -extern void *__libc_stack_end; extern void weak_function _stdio_init(void); extern int *weak_const_function __errno_location(void); extern int *weak_const_function __h_errno_location(void); @@ -49,10 +59,6 @@ extern void weak_function _locale_init(void); extern void weak_function __pthread_initialize_minimal(void); #endif - - - - /* * Declare the __environ global variable and create a weak alias environ. * Note: Apparently we must initialize __environ to ensure that the weak @@ -64,7 +70,6 @@ weak_alias(__environ, environ); size_t __pagesize = 0; const char *__progname = 0; - #ifndef O_NOFOLLOW # define O_NOFOLLOW 0 #endif @@ -110,61 +115,6 @@ static int __check_suid(void) return 1; } -#ifdef __UCLIBC_HAS_SSP__ -static __always_inline uintptr_t _dl_guard_setup(void) -{ - uintptr_t ret; -#ifndef __SSP_QUICK_CANARY__ - - size_t size; - -# ifdef __SSP_USE_ERANDOM__ - { - int mib[3]; - /* Random is another depth in Linux, hence an array of 3. */ - mib[0] = CTL_KERN; - mib[1] = KERN_RANDOM; - mib[2] = RANDOM_ERANDOM; - - if (SYSCTL(mib, 3, &ret, &size, NULL, 0) != (-1)) - if (size == (size_t) sizeof(ret)) - return ret; - } -# endif /* ifdef __SSP_USE_ERANDOM__ */ - { - int fd; - -# ifdef __SSP_USE_ERANDOM__ - /* - * Attempt to open kernel pseudo random device if one exists before - * opening urandom to avoid system entropy depletion. - */ - if ((fd = OPEN("/dev/erandom", O_RDONLY)) == (-1)) -# endif - fd = OPEN("/dev/urandom", O_RDONLY); - if (fd >= 0) { - size = READ(fd, &ret, sizeof(ret)); - CLOSE(fd); - if (size == (size_t) sizeof(ret)) - return ret; - } - } -#endif /* ifndef __SSP_QUICK_CANARY__ */ - - /* Start with the "terminator canary". */ - ret = 0xFF0A0D00UL; - - /* Everything failed? Or we are using a weakened model of the - * terminator canary */ - { - struct timeval tv; - if (GETTIMEOFDAY(&tv, NULL) != (-1)) - ret ^= tv.tv_usec ^ tv.tv_sec; - } - return ret; -} -#endif /* __UCLIBC_HAS_SSP__ */ - /* __uClibc_init completely initialize uClibc so it is ready to use. * * On ELF systems (with a dynamic loader) this function must be called @@ -199,12 +149,16 @@ void __uClibc_init(void) __pthread_initialize_minimal(); #endif -#ifdef __UCLIBC_HAS_SSP__ - uintptr_t stack_chk_guard = _dl_guard_setup(); - /* for gcc-3.x + Etoh ssp */ - __guard = stack_chk_guard; - /* for gcc-4.1 non-TLS */ +#ifndef SHARED +# ifdef __UCLIBC_HAS_SSP__ + /* Set up the stack checker's canary. */ + uintptr_t stack_chk_guard = _dl_setup_stack_chk_guard(); +# ifdef THREAD_SET_STACK_GUARD + THREAD_SET_STACK_GUARD (stack_chk_guard); +# else __stack_chk_guard = stack_chk_guard; +# endif +# endif #endif #ifdef __UCLIBC_HAS_LOCALE__ @@ -241,7 +195,10 @@ __uClibc_main(int (*main)(int, char **, char **), int argc, unsigned long *aux_dat; ElfW(auxv_t) auxvt[AT_EGID + 1]; #endif + +#ifndef SHARED __libc_stack_end = stack_end; +#endif __rtld_fini = rtld_fini; |