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Commit 724ed8f4 authored by Channagoud Kadabi's avatar Channagoud Kadabi
Browse files

include: Disable compile time boundary check 



Newer version of gcc keeps the calls to __write_overflow which is only a
compile time check. __write_overflow is implemented as error function
and as a result all the string functions fail with the overflow error.
Work around the gcc issue by defining the overflow functions as no-op.

Change-Id: I41c2bb6d35c1a308c1a4e9c1d484ad6ad2bf7d3f
Signed-off-by: default avatarChannagoud Kadabi <ckadabi@codeaurora.org>
parent 4e7334e5

arch/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -224,6 +224,14 @@ config ARCH_HAS_FORTIFY_SOURCE 
	  An architecture should select this when it can successfully

	  build and run with CONFIG_FORTIFY_SOURCE.



config FORTIFY_COMPILE_CHECK

	depends on ARCH_HAS_FORTIFY_SOURCE

	bool

	help

	  Disable compile time size check for string routines as part

	  of fortify source. Selecting this option will not enforce compile

	  time size check for string functions.



# Select if arch init_task initializer is different to init/init_task.c

config ARCH_INIT_TASK

       bool

include/linux/string.h

+7 −0
Original line number Diff line number Diff line
@@ -173,9 +173,16 @@ static inline const char *kbasename(const char *path) 
#define __RENAME(x) __asm__(#x)



void fortify_panic(const char *name) __noreturn __cold;



#ifdef CONFIG_FORTIFY_COMPILE_CHECK

void __read_overflow(void) __compiletime_error("detected read beyond size of object passed as 1st parameter");

void __read_overflow2(void) __compiletime_error("detected read beyond size of object passed as 2nd parameter");

void __write_overflow(void) __compiletime_error("detected write beyond size of object passed as 1st parameter");

#else

#define __read_overflow(void) do { } while (0)

#define __read_overflow2(void) do { } while (0)

#define __write_overflow(void) do { } while (0)

#endif



#if !defined(__NO_FORTIFY) && defined(__OPTIMIZE__) && defined(CONFIG_FORTIFY_SOURCE)

__FORTIFY_INLINE char *strncpy(char *p, const char *q, __kernel_size_t size)