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 stackleak_task_init(struct task_struct * t)18static 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 */ stackleak_task_init(struct task_struct * t)32static inline void stackleak_task_init(struct task_struct *t) { } 33 #endif 34 35 #endif 36
