diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/dl-osinfo.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/dl-osinfo.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/dl-osinfo.h b/sysdeps/unix/sysv/linux/dl-osinfo.h index 03e1de716c..e374023841 100644 --- a/sysdeps/unix/sysv/linux/dl-osinfo.h +++ b/sysdeps/unix/sysv/linux/dl-osinfo.h @@ -23,6 +23,7 @@ #include <sys/utsname.h> #include "kernel-features.h" #include <dl-sysdep.h> +#include <stdint.h> #ifndef MIN # define MIN(a,b) (((a)<(b))?(a):(b)) @@ -157,3 +158,24 @@ _dl_discover_osversion (void) else if (__LINUX_KERNEL_VERSION > 0) \ FATAL ("FATAL: cannot determine kernel version\n"); \ } while (0) + +static inline uintptr_t __attribute__ ((always_inline)) +_dl_setup_stack_chk_guard (void) +{ + uintptr_t ret; +#ifdef ENABLE_STACKGUARD_RANDOMIZE + int fd = __open ("/dev/urandom", O_RDONLY); + if (fd >= 0) + { + ssize_t reslen = __read (fd, &ret, sizeof (ret)); + __close (fd); + if (reslen == (ssize_t) sizeof (ret)) + return ret; + } +#endif + ret = 0; + unsigned char *p = (unsigned char *) &ret; + p[sizeof (ret) - 1] = 255; + p[sizeof (ret) - 2] = '\n'; + return ret; +} |