diff options
| author | David Daney <ddaney@caviumnetworks.com> | 2010-07-19 13:14:56 -0700 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2010-08-05 13:26:05 +0100 |
| commit | 1091458d09e1a0788268578001f279250d2c0844 (patch) | |
| tree | 9a02e6153d6658cab4b653ba845e68b161cac908 /arch/mips/include/asm | |
| parent | b3b3c176d9150af542d9ba5e5b292d233883ff85 (diff) | |
MIPS: Randomize mmap if randomize_va_space is set
Fairly straight forward: For 32-bit address spaces randomize within a
16MB space, for 64-bit within a 256MB space.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1480/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm')
| -rw-r--r-- | arch/mips/include/asm/processor.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h index 5d33b727acf..24d91f8618f 100644 --- a/arch/mips/include/asm/processor.h +++ b/arch/mips/include/asm/processor.h @@ -34,6 +34,11 @@ extern void (*cpu_wait)(void); extern unsigned int vced_count, vcei_count; /* + * MIPS does have an arch_pick_mmap_layout() + */ +#define HAVE_ARCH_PICK_MMAP_LAYOUT 1 + +/* * A special page (the vdso) is mapped into all processes at the very * top of the virtual memory space. */ @@ -52,6 +57,9 @@ extern unsigned int vced_count, vcei_count; * space during mmap's. */ #define TASK_UNMAPPED_BASE ((TASK_SIZE / 3) & ~(PAGE_SIZE)) + +#define TASK_IS_32BIT_ADDR 1 + #endif #ifdef CONFIG_64BIT @@ -77,6 +85,9 @@ extern unsigned int vced_count, vcei_count; PAGE_ALIGN(TASK_SIZE32 / 3) : PAGE_ALIGN(TASK_SIZE / 3)) #define TASK_SIZE_OF(tsk) \ (test_tsk_thread_flag(tsk, TIF_32BIT_ADDR) ? TASK_SIZE32 : TASK_SIZE) + +#define TASK_IS_32BIT_ADDR test_thread_flag(TIF_32BIT_ADDR) + #endif #ifdef __KERNEL__ |