[PATCH] x86_64: Increase the variability of the process stack on 64bit architectures

[net-next-2.6.git] / include / asm-x86_64 / elf.h

diff --git a/include/asm-x86_64/elf.h b/include/asm-x86_64/elf.h
index a60a35e792226248cbbcc4e4e44ff266b7e5a04a..c98633af07d26abb0ee6776f90c6eef7dd60008f 100644 (file)
--- a/include/asm-x86_64/elf.h
+++ b/include/asm-x86_64/elf.h
@@ -8,6 +8,7 @@
 #include <asm/ptrace.h>
 #include <asm/user.h>
 #include <asm/processor.h>
+#include <asm/compat.h>
 
 /* x86-64 relocation types */
 #define R_X86_64_NONE          0       /* No reloc */
@@ -149,12 +150,17 @@ extern void set_personality_64bit(void);
  */
 #define elf_read_implies_exec(ex, executable_stack)    (executable_stack != EXSTACK_DISABLE_X)
 
+struct task_struct;
+
 extern int dump_task_regs (struct task_struct *, elf_gregset_t *);
 extern int dump_task_fpu (struct task_struct *, elf_fpregset_t *);
 
 #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
 #define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs)
 
+/* 1GB for 64bit, 8MB for 32bit */
+#define STACK_RND_MASK (is_compat_task() ? 0x7ff : 0x3fffff)
+
 #endif
 
 #endif