tools/nolibc: crt.h: initialize stack protector

As suggested by Thomas, It is able to move the stackprotector
initialization from the assembly _start to the beginning of the new
_start_c(). Let's call __stack_chk_init() in _start_c() as a
preparation.

Suggested-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/lkml/a00284a6-54b1-498c-92aa-44997fa78403@t-8ch.de/
Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>

diff --git a/tools/include/nolibc/crt.h b/tools/include/nolibc/crt.h
index 92a2a04..32e128b 100644 (file)
--- a/tools/include/nolibc/crt.h
+++ b/tools/include/nolibc/crt.h
@@ -10,6 +10,7 @@
 char **environ __attribute__((weak));
 const unsigned long *_auxv __attribute__((weak));
 
+void __stack_chk_init(void);
 static void exit(int);
 
 void _start_c(long *sp)
@@ -21,6 +22,9 @@ void _start_c(long *sp)
        /* silence potential warning: conflicting types for 'main' */
        int _nolibc_main(int, char **, char **) __asm__ ("main");
 
+       /* initialize stack protector */
+       __stack_chk_init();
+
        /*
         * sp  :    argc          <-- argument count, required by main()
         * argv:    argv[0]       <-- argument vector, required by main()