Line data    Source code

       1             : /* SPDX-License-Identifier: GPL-2.0 */
       2             : #ifndef _LINUX_STACKLEAK_H
       3             : #define _LINUX_STACKLEAK_H
       4             : 
       5             : #include <linux/sched.h>
       6             : #include <linux/sched/task_stack.h>
       7             : 
       8             : /*
       9             :  * Check that the poison value points to the unused hole in the
      10             :  * virtual memory map for your platform.
      11             :  */
      12             : #define STACKLEAK_POISON -0xBEEF
      13             : #define STACKLEAK_SEARCH_DEPTH 128
      14             : 
      15             : #ifdef CONFIG_GCC_PLUGIN_STACKLEAK
      16             : #include <asm/stacktrace.h>
      17             : 
      18             : static inline void stackleak_task_init(struct task_struct *t)
      19             : {
      20             :         t->lowest_stack = (unsigned long)end_of_stack(t) + sizeof(unsigned long);
      21             : # ifdef CONFIG_STACKLEAK_METRICS
      22             :         t->prev_lowest_stack = t->lowest_stack;
      23             : # endif
      24             : }
      25             : 
      26             : #ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE
      27             : int stack_erasing_sysctl(struct ctl_table *table, int write,
      28             :                         void *buffer, size_t *lenp, loff_t *ppos);
      29             : #endif
      30             : 
      31             : #else /* !CONFIG_GCC_PLUGIN_STACKLEAK */
      32         916 : static inline void stackleak_task_init(struct task_struct *t) { }
      33             : #endif
      34             : 
      35             : #endif