From 1091458d09e1a0788268578001f279250d2c0844 Mon Sep 17 00:00:00 2001 From: David Daney Date: Mon, 19 Jul 2010 13:14:56 -0700 Subject: 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 To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1480/ Signed-off-by: Ralf Baechle --- arch/mips/include/asm/processor.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'arch/mips/include/asm/processor.h') diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h index 5d33b727acf5..24d91f8618f0 100644 --- a/arch/mips/include/asm/processor.h +++ b/arch/mips/include/asm/processor.h @@ -33,6 +33,11 @@ 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__ -- cgit v1.2.3