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Файловый менеджер - Редактировать - /usr/src/linux-headers-5.4.0-200/include/linux/sched/task_stack.h

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/* SPDX-License-Identifier: GPL-2.0 / #ifndef _LINUX_SCHED_TASK_STACK_H #define _LINUX_SCHED_TASK_STACK_H / * task->stack (kernel stack) handling interfaces: / #include <linux/sched.h> #include <linux/magic.h> #ifdef CONFIG_THREAD_INFO_IN_TASK / * When accessing the stack of a non-current task that might exit, use * try_get_task_stack() instead. task_stack_page will return a pointer * that could get freed out from under you. / static __always_inline void task_stack_page(const struct task_struct task) { return task->stack; } #define setup_thread_stack(new,old) do { } while(0) static __always_inline unsigned long end_of_stack(const struct task_struct task) { #ifdef CONFIG_STACK_GROWSUP return (unsigned long )((unsigned long)task->stack + THREAD_SIZE) - 1; #else return task->stack; #endif } #elif !defined(__HAVE_THREAD_FUNCTIONS) #define task_stack_page(task) ((void )(task)->stack) static inline void setup_thread_stack(struct task_struct p, struct task_struct org) { task_thread_info(p) = task_thread_info(org); task_thread_info(p)->task = p; } / * Return the address of the last usable long on the stack. * * When the stack grows down, this is just above the thread * info struct. Going any lower will corrupt the threadinfo. * * When the stack grows up, this is the highest address. * Beyond that position, we corrupt data on the next page. / static inline unsigned long end_of_stack(struct task_struct p) { #ifdef CONFIG_STACK_GROWSUP return (unsigned long )((unsigned long)task_thread_info(p) + THREAD_SIZE) - 1; #else return (unsigned long )(task_thread_info(p) + 1); #endif } #endif #ifdef CONFIG_THREAD_INFO_IN_TASK static inline void try_get_task_stack(struct task_struct tsk) { return refcount_inc_not_zero(&tsk->stack_refcount) ? task_stack_page(tsk) : NULL; } extern void put_task_stack(struct task_struct tsk); #else static inline void try_get_task_stack(struct task_struct tsk) { return task_stack_page(tsk); } static inline void put_task_stack(struct task_struct tsk) {} #endif #define task_stack_end_corrupted(task) \ ((end_of_stack(task)) != STACK_END_MAGIC) static inline int object_is_on_stack(const void obj) { void stack = task_stack_page(current); return (obj >= stack) && (obj < (stack + THREAD_SIZE)); } extern void thread_stack_cache_init(void); #ifdef CONFIG_DEBUG_STACK_USAGE static inline unsigned long stack_not_used(struct task_struct p) { unsigned long n = end_of_stack(p); do { /* Skip over canary / # ifdef CONFIG_STACK_GROWSUP n--; # else n++; # endif } while (!n); # ifdef CONFIG_STACK_GROWSUP return (unsigned long)end_of_stack(p) - (unsigned long)n; # else return (unsigned long)n - (unsigned long)end_of_stack(p); # endif } #endif extern void set_task_stack_end_magic(struct task_struct tsk); #ifndef __HAVE_ARCH_KSTACK_END static inline int kstack_end(void addr) { /* Reliable end of stack detection: * Some APM bios versions misalign the stack / return !(((unsigned long)addr+sizeof(void)-1) & (THREAD_SIZE-sizeof(void))); } #endif #endif / _LINUX_SCHED_TASK_STACK_H */

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