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| author |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2017-09-12 13:49:57 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-09-28 07:29:40 +0200 |
| commit | 79962038dffab28094782406d8e27b095a26ce51 (patch) | |
| tree | ac753c022318cae009c04b8e6e45cdaaaf250836 /arch/s390 | |
| parent | s390: get rid of exit_thread() (diff) | |
| download | linux-dev-79962038dffab28094782406d8e27b095a26ce51.tar.xz linux-dev-79962038dffab28094782406d8e27b095a26ce51.zip | |
s390: add support for FORTIFY_SOURCE
This is the quite trivial backend for s390 which is required to enable
FORTIFY_SOURCE support.
See commit 6974f0c4555e ("include/linux/string.h: add the option of
fortified string.h functions") for more details.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/Kconfig | 1 | ||||
| -rw-r--r-- | arch/s390/boot/compressed/Makefile | 2 | ||||
| -rw-r--r-- | arch/s390/include/asm/string.h | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/Makefile | 2 |
4 files changed, 5 insertions, 2 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 2784ca96f418..4edc91e6c3ff 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -67,6 +67,7 @@ config S390 select ARCH_BINFMT_ELF_STATE select ARCH_HAS_DEVMEM_IS_ALLOWED select ARCH_HAS_ELF_RANDOMIZE + select ARCH_HAS_FORTIFY_SOURCE select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA select ARCH_HAS_KCOV diff --git a/arch/s390/boot/compressed/Makefile b/arch/s390/boot/compressed/Makefile index f7e4c834ea24..ec63b580d41f 100644 --- a/arch/s390/boot/compressed/Makefile +++ b/arch/s390/boot/compressed/Makefile @@ -11,7 +11,7 @@ targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4 targets += misc.o piggy.o sizes.h head.o KBUILD_CFLAGS := -m64 -D__KERNEL__ -O2 -KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING +KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY KBUILD_CFLAGS += $(cflags-y) -fno-delete-null-pointer-checks -msoft-float KBUILD_CFLAGS += $(call cc-option,-mpacked-stack) KBUILD_CFLAGS += $(call cc-option,-ffreestanding) diff --git a/arch/s390/include/asm/string.h b/arch/s390/include/asm/string.h index e5f5c7074f2c..8fb43319693d 100644 --- a/arch/s390/include/asm/string.h +++ b/arch/s390/include/asm/string.h @@ -49,7 +49,7 @@ extern char *strstr(const char *, const char *); #undef __HAVE_ARCH_STRSEP #undef __HAVE_ARCH_STRSPN -#if !defined(IN_ARCH_STRING_C) +#if !defined(IN_ARCH_STRING_C) && (!defined(CONFIG_FORTIFY_SOURCE) || defined(__NO_FORTIFY)) static inline void *memchr(const void * s, int c, size_t n) { diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile index adb3fe2e3d42..9118e62f9fca 100644 --- a/arch/s390/kernel/Makefile +++ b/arch/s390/kernel/Makefile @@ -33,6 +33,8 @@ AFLAGS_REMOVE_head.o += $(CC_FLAGS_MARCH) AFLAGS_head.o += -march=z900 endif +CFLAGS_als.o += -D__NO_FORTIFY + # # Passing null pointers is ok for smp code, since we access the lowcore here. # |