1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef _LINUX_STACKLEAK_H 3*4882a593Smuzhiyun #define _LINUX_STACKLEAK_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <linux/sched.h> 6*4882a593Smuzhiyun #include <linux/sched/task_stack.h> 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun /* 9*4882a593Smuzhiyun * Check that the poison value points to the unused hole in the 10*4882a593Smuzhiyun * virtual memory map for your platform. 11*4882a593Smuzhiyun */ 12*4882a593Smuzhiyun #define STACKLEAK_POISON -0xBEEF 13*4882a593Smuzhiyun #define STACKLEAK_SEARCH_DEPTH 128 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #ifdef CONFIG_GCC_PLUGIN_STACKLEAK 16*4882a593Smuzhiyun #include <asm/stacktrace.h> 17*4882a593Smuzhiyun stackleak_task_init(struct task_struct * t)18*4882a593Smuzhiyunstatic inline void stackleak_task_init(struct task_struct *t) 19*4882a593Smuzhiyun { 20*4882a593Smuzhiyun t->lowest_stack = (unsigned long)end_of_stack(t) + sizeof(unsigned long); 21*4882a593Smuzhiyun # ifdef CONFIG_STACKLEAK_METRICS 22*4882a593Smuzhiyun t->prev_lowest_stack = t->lowest_stack; 23*4882a593Smuzhiyun # endif 24*4882a593Smuzhiyun } 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun #ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE 27*4882a593Smuzhiyun int stack_erasing_sysctl(struct ctl_table *table, int write, 28*4882a593Smuzhiyun void *buffer, size_t *lenp, loff_t *ppos); 29*4882a593Smuzhiyun #endif 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun #else /* !CONFIG_GCC_PLUGIN_STACKLEAK */ stackleak_task_init(struct task_struct * t)32*4882a593Smuzhiyunstatic inline void stackleak_task_init(struct task_struct *t) { } 33*4882a593Smuzhiyun #endif 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun #endif 36