CHROMIUM: security: use -fstack-protector-strong

[cascardo/linux.git] / arch / arm / boot / compressed / misc.c

diff --git a/arch/arm/boot/compressed/misc.c b/arch/arm/boot/compressed/misc.c
index 832d372..9773a29 100644 (file)
--- a/arch/arm/boot/compressed/misc.c
+++ b/arch/arm/boot/compressed/misc.c
@@ -18,14 +18,9 @@
 
 unsigned int __machine_arch_type;
 
-#define _LINUX_STRING_H_
-
 #include <linux/compiler.h>    /* for inline */
-#include <linux/types.h>       /* for size_t */
-#include <linux/stddef.h>      /* for NULL */
+#include <linux/types.h>
 #include <linux/linkage.h>
-#include <asm/string.h>
-
 
 static void putstr(const char *ptr);
 extern void error(char *x);
@@ -101,41 +96,6 @@ static void putstr(const char *ptr)
        flush();
 }
 
-
-void *memcpy(void *__dest, __const void *__src, size_t __n)
-{
-       int i = 0;
-       unsigned char *d = (unsigned char *)__dest, *s = (unsigned char *)__src;
-
-       for (i = __n >> 3; i > 0; i--) {
-               *d++ = *s++;
-               *d++ = *s++;
-               *d++ = *s++;
-               *d++ = *s++;
-               *d++ = *s++;
-               *d++ = *s++;
-               *d++ = *s++;
-               *d++ = *s++;
-       }
-
-       if (__n & 1 << 2) {
-               *d++ = *s++;
-               *d++ = *s++;
-               *d++ = *s++;
-               *d++ = *s++;
-       }
-
-       if (__n & 1 << 1) {
-               *d++ = *s++;
-               *d++ = *s++;
-       }
-
-       if (__n & 1)
-               *d++ = *s++;
-
-       return __dest;
-}
-
 /*
  * gzip declarations
  */
@@ -167,6 +127,18 @@ asmlinkage void __div0(void)
        error("Attempting division by 0!");
 }
 
+unsigned long __stack_chk_guard;
+
+void __stack_chk_guard_setup(void)
+{
+       __stack_chk_guard = 0x000a0dff;
+}
+
+void __stack_chk_fail(void)
+{
+       error("stack-protector: Kernel stack is corrupted\n");
+}
+
 extern int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x));
 
 
@@ -177,6 +149,8 @@ decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p,
 {
        int ret;
 
+       __stack_chk_guard_setup();
+
        output_data             = (unsigned char *)output_start;
        free_mem_ptr            = free_mem_ptr_p;
        free_mem_end_ptr        = free_mem_ptr_end_p;