x86[_64]: Randomize initial stack pointer on alternative signal stacks

If the alternate signal stack is used randomize the initial stack pointer in the same way it is randomized on "normal" thread stacks. Also, update MINSIGSTKSZ value so that regardless of where the new stack pointer points to there is at least 4k of stack left.
2013-09-21 21:52:13 +02:00
parent 18ad64f227
commit afaa6ed4b3
3 changed files with 23 additions and 21 deletions
@@ -95,7 +95,7 @@ struct sigaction {
 #define SS_ONSTACK		0x1
 #define SS_DISABLE		0x2

-#define MINSIGSTKSZ		4096
+#define MINSIGSTKSZ		8192
 #define SIGSTKSZ		16384

 /* for signals using an alternate stack */