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author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-07-31 15:20:16 +0200 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-07-31 15:20:16 +0200 |
commit | 7b70c4275f28702b76b273c8534c38f8313812e9 (patch) | |
tree | 1df2229ca02466bd1adda814ac5c37aa0a597db1 /arch/arm/include | |
parent | Merge branch 'misc' into devel (diff) | |
parent | Merge branch 'arm/booting' of git://git.pengutronix.de/git/ukl/linux-2.6 into... (diff) | |
download | linux-7b70c4275f28702b76b273c8534c38f8313812e9.tar.xz linux-7b70c4275f28702b76b273c8534c38f8313812e9.zip |
Merge branch 'devel-stable' into devel
Conflicts:
arch/arm/kernel/entry-armv.S
arch/arm/kernel/setup.c
arch/arm/mm/init.c
Diffstat (limited to 'arch/arm/include')
-rw-r--r-- | arch/arm/include/asm/elf.h | 4 | ||||
-rw-r--r-- | arch/arm/include/asm/mach/pci.h | 1 | ||||
-rw-r--r-- | arch/arm/include/asm/stackprotector.h | 38 |
3 files changed, 43 insertions, 0 deletions
diff --git a/arch/arm/include/asm/elf.h b/arch/arm/include/asm/elf.h index 51662feb9f1d..6750b8e45a49 100644 --- a/arch/arm/include/asm/elf.h +++ b/arch/arm/include/asm/elf.h @@ -121,4 +121,8 @@ int dump_task_regs(struct task_struct *t, elf_gregset_t *elfregs); extern void elf_set_personality(const struct elf32_hdr *); #define SET_PERSONALITY(ex) elf_set_personality(&(ex)) +struct mm_struct; +extern unsigned long arch_randomize_brk(struct mm_struct *mm); +#define arch_randomize_brk arch_randomize_brk + #endif diff --git a/arch/arm/include/asm/mach/pci.h b/arch/arm/include/asm/mach/pci.h index 52f0da1e97df..16330bd0657c 100644 --- a/arch/arm/include/asm/mach/pci.h +++ b/arch/arm/include/asm/mach/pci.h @@ -46,6 +46,7 @@ struct pci_sys_data { /* IRQ mapping */ int (*map_irq)(struct pci_dev *, u8, u8); struct hw_pci *hw; + void *private_data; /* platform controller private data */ }; /* diff --git a/arch/arm/include/asm/stackprotector.h b/arch/arm/include/asm/stackprotector.h new file mode 100644 index 000000000000..de003327be97 --- /dev/null +++ b/arch/arm/include/asm/stackprotector.h @@ -0,0 +1,38 @@ +/* + * GCC stack protector support. + * + * Stack protector works by putting predefined pattern at the start of + * the stack frame and verifying that it hasn't been overwritten when + * returning from the function. The pattern is called stack canary + * and gcc expects it to be defined by a global variable called + * "__stack_chk_guard" on ARM. This unfortunately means that on SMP + * we cannot have a different canary value per task. + */ + +#ifndef _ASM_STACKPROTECTOR_H +#define _ASM_STACKPROTECTOR_H 1 + +#include <linux/random.h> +#include <linux/version.h> + +extern unsigned long __stack_chk_guard; + +/* + * Initialize the stackprotector canary value. + * + * NOTE: this must only be called from functions that never return, + * and it must always be inlined. + */ +static __always_inline void boot_init_stack_canary(void) +{ + unsigned long canary; + + /* Try to get a semi random initial value. */ + get_random_bytes(&canary, sizeof(canary)); + canary ^= LINUX_VERSION_CODE; + + current->stack_canary = canary; + __stack_chk_guard = current->stack_canary; +} + +#endif /* _ASM_STACKPROTECTOR_H */ |