vasilito
dc68054305
- Restore 29 recipe symlinks (libdrm, qtbase, dbus, sddm, pipewire, etc.) - Restore 33 patches (KDE, libdrm, mesa, pipewire, sddm, wireplumber) - Restore 20+ local/scripts (audit, lint, test, build helpers) - Restore src/cook/scheduler.rs, status.rs, gnu-config/ - Restore scripts/patch-inclusion-gate.sh, run_mini1.sh, validate-collision-log.sh - Recover TLC source from HEAD (was overwritten by 0.2.3 checkout) - Recover 11 local/docs plans from HEAD (were overwritten) - Recover qt6-wayland-smoke symlink from HEAD - Fix MOTD: remove garbled ASCII art, use clean text - Update version: 0.2.0 -> 0.2.4 in os-release, motd, config - Reduce filesystem_size: 1536 -> 512 MiB - Add ABSOLUTE RULE to AGENTS.md: never delete/ignore packages - Reduce pcid scheme log verbosity: info -> debug
118 lines
2.9 KiB
C
118 lines
2.9 KiB
C
/* 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>
|
|
#include <linux/refcount.h>
|
|
#include <linux/kasan.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
|
|
}
|
|
|
|
#else
|
|
|
|
#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(const 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
|
|
|
|
void exit_task_stack_account(struct task_struct *tsk);
|
|
|
|
#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);
|
|
|
|
obj = kasan_reset_tag(obj);
|
|
return (obj >= stack) && (obj < (stack + THREAD_SIZE));
|
|
}
|
|
|
|
extern void thread_stack_cache_init(void);
|
|
|
|
#ifdef CONFIG_DEBUG_STACK_USAGE
|
|
unsigned long stack_not_used(struct task_struct *p);
|
|
#else
|
|
static inline unsigned long stack_not_used(struct task_struct *p)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
extern void set_task_stack_end_magic(struct task_struct *tsk);
|
|
|
|
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 /* _LINUX_SCHED_TASK_STACK_H */
|