aboutsummaryrefslogtreecommitdiff
path: root/include
diff options
context:
space:
mode:
authorArjan van de Ven <arjan@linux.intel.com>2006-09-26 10:52:38 +0200
committerAndi Kleen <andi@basil.nowhere.org>2006-09-26 10:52:38 +0200
commit0a4254058037eb172758961d0a5b94f4320a1425 (patch)
treee9e64daf007952322c7ab0671b2f2f841085c04d /include
parentb62a5c740df1e3d49a97349fce0c6a23f633d7fe (diff)
[PATCH] Add the canary field to the PDA area and the task struct
This patch adds the per thread cookie field to the task struct and the PDA. Also it makes sure that the PDA value gets the new cookie value at context switch, and that a new task gets a new cookie at task creation time. Signed-off-by: Arjan van Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andi Kleen <ak@suse.de> CC: Andi Kleen <ak@suse.de>
Diffstat (limited to 'include')
-rw-r--r--include/asm-x86_64/pda.h7
-rw-r--r--include/linux/sched.h5
2 files changed, 11 insertions, 1 deletions
diff --git a/include/asm-x86_64/pda.h b/include/asm-x86_64/pda.h
index 6794ffaae43..e7773e0af86 100644
--- a/include/asm-x86_64/pda.h
+++ b/include/asm-x86_64/pda.h
@@ -16,7 +16,12 @@ struct x8664_pda {
unsigned long oldrsp; /* 24 user rsp for system call */
int irqcount; /* 32 Irq nesting counter. Starts with -1 */
int cpunumber; /* 36 Logical CPU number */
- char *irqstackptr; /* 40 top of irqstack */
+#ifdef CONFIG_CC_STACKPROTECTOR
+ unsigned long stack_canary; /* 40 stack canary value */
+ /* gcc-ABI: this canary MUST be at
+ offset 40!!! */
+#endif
+ char *irqstackptr;
int nodenumber; /* number of current node */
unsigned int __softirq_pending;
unsigned int __nmi_count; /* number of NMI on this CPUs */
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 807556c5bcd..9d4aa7f95bc 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -819,6 +819,11 @@ struct task_struct {
unsigned did_exec:1;
pid_t pid;
pid_t tgid;
+
+#ifdef CONFIG_CC_STACKPROTECTOR
+ /* Canary value for the -fstack-protector gcc feature */
+ unsigned long stack_canary;
+#endif
/*
* pointers to (original) parent process, youngest child, younger sibling,
* older sibling, respectively. (p->father can be replaced with