mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-18 10:13:57 +08:00
f39650de68
kernel.h is being used as a dump for all kinds of stuff for a long time. Here is the attempt to start cleaning it up by splitting out panic and oops helpers. There are several purposes of doing this: - dropping dependency in bug.h - dropping a loop by moving out panic_notifier.h - unload kernel.h from something which has its own domain At the same time convert users tree-wide to use new headers, although for the time being include new header back to kernel.h to avoid twisted indirected includes for existing users. [akpm@linux-foundation.org: thread_info.h needs limits.h] [andriy.shevchenko@linux.intel.com: ia64 fix] Link: https://lkml.kernel.org/r/20210520130557.55277-1-andriy.shevchenko@linux.intel.com Link: https://lkml.kernel.org/r/20210511074137.33666-1-andriy.shevchenko@linux.intel.com Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Co-developed-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Corey Minyard <cminyard@mvista.com> Acked-by: Christian Brauner <christian.brauner@ubuntu.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Kees Cook <keescook@chromium.org> Acked-by: Wei Liu <wei.liu@kernel.org> Acked-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Sebastian Reichel <sre@kernel.org> Acked-by: Luis Chamberlain <mcgrof@kernel.org> Acked-by: Stephen Boyd <sboyd@kernel.org> Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Acked-by: Helge Deller <deller@gmx.de> # parisc Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
229 lines
6.5 KiB
C
229 lines
6.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/* thread_info.h: common low-level thread information accessors
|
|
*
|
|
* Copyright (C) 2002 David Howells (dhowells@redhat.com)
|
|
* - Incorporating suggestions made by Linus Torvalds
|
|
*/
|
|
|
|
#ifndef _LINUX_THREAD_INFO_H
|
|
#define _LINUX_THREAD_INFO_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/limits.h>
|
|
#include <linux/bug.h>
|
|
#include <linux/restart_block.h>
|
|
#include <linux/errno.h>
|
|
|
|
#ifdef CONFIG_THREAD_INFO_IN_TASK
|
|
/*
|
|
* For CONFIG_THREAD_INFO_IN_TASK kernels we need <asm/current.h> for the
|
|
* definition of current, but for !CONFIG_THREAD_INFO_IN_TASK kernels,
|
|
* including <asm/current.h> can cause a circular dependency on some platforms.
|
|
*/
|
|
#include <asm/current.h>
|
|
#define current_thread_info() ((struct thread_info *)current)
|
|
#endif
|
|
|
|
#include <linux/bitops.h>
|
|
|
|
/*
|
|
* For per-arch arch_within_stack_frames() implementations, defined in
|
|
* asm/thread_info.h.
|
|
*/
|
|
enum {
|
|
BAD_STACK = -1,
|
|
NOT_STACK = 0,
|
|
GOOD_FRAME,
|
|
GOOD_STACK,
|
|
};
|
|
|
|
#ifdef CONFIG_GENERIC_ENTRY
|
|
enum syscall_work_bit {
|
|
SYSCALL_WORK_BIT_SECCOMP,
|
|
SYSCALL_WORK_BIT_SYSCALL_TRACEPOINT,
|
|
SYSCALL_WORK_BIT_SYSCALL_TRACE,
|
|
SYSCALL_WORK_BIT_SYSCALL_EMU,
|
|
SYSCALL_WORK_BIT_SYSCALL_AUDIT,
|
|
SYSCALL_WORK_BIT_SYSCALL_USER_DISPATCH,
|
|
SYSCALL_WORK_BIT_SYSCALL_EXIT_TRAP,
|
|
};
|
|
|
|
#define SYSCALL_WORK_SECCOMP BIT(SYSCALL_WORK_BIT_SECCOMP)
|
|
#define SYSCALL_WORK_SYSCALL_TRACEPOINT BIT(SYSCALL_WORK_BIT_SYSCALL_TRACEPOINT)
|
|
#define SYSCALL_WORK_SYSCALL_TRACE BIT(SYSCALL_WORK_BIT_SYSCALL_TRACE)
|
|
#define SYSCALL_WORK_SYSCALL_EMU BIT(SYSCALL_WORK_BIT_SYSCALL_EMU)
|
|
#define SYSCALL_WORK_SYSCALL_AUDIT BIT(SYSCALL_WORK_BIT_SYSCALL_AUDIT)
|
|
#define SYSCALL_WORK_SYSCALL_USER_DISPATCH BIT(SYSCALL_WORK_BIT_SYSCALL_USER_DISPATCH)
|
|
#define SYSCALL_WORK_SYSCALL_EXIT_TRAP BIT(SYSCALL_WORK_BIT_SYSCALL_EXIT_TRAP)
|
|
#endif
|
|
|
|
#include <asm/thread_info.h>
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#ifndef arch_set_restart_data
|
|
#define arch_set_restart_data(restart) do { } while (0)
|
|
#endif
|
|
|
|
static inline long set_restart_fn(struct restart_block *restart,
|
|
long (*fn)(struct restart_block *))
|
|
{
|
|
restart->fn = fn;
|
|
arch_set_restart_data(restart);
|
|
return -ERESTART_RESTARTBLOCK;
|
|
}
|
|
|
|
#ifndef THREAD_ALIGN
|
|
#define THREAD_ALIGN THREAD_SIZE
|
|
#endif
|
|
|
|
#define THREADINFO_GFP (GFP_KERNEL_ACCOUNT | __GFP_ZERO)
|
|
|
|
/*
|
|
* flag set/clear/test wrappers
|
|
* - pass TIF_xxxx constants to these functions
|
|
*/
|
|
|
|
static inline void set_ti_thread_flag(struct thread_info *ti, int flag)
|
|
{
|
|
set_bit(flag, (unsigned long *)&ti->flags);
|
|
}
|
|
|
|
static inline void clear_ti_thread_flag(struct thread_info *ti, int flag)
|
|
{
|
|
clear_bit(flag, (unsigned long *)&ti->flags);
|
|
}
|
|
|
|
static inline void update_ti_thread_flag(struct thread_info *ti, int flag,
|
|
bool value)
|
|
{
|
|
if (value)
|
|
set_ti_thread_flag(ti, flag);
|
|
else
|
|
clear_ti_thread_flag(ti, flag);
|
|
}
|
|
|
|
static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag)
|
|
{
|
|
return test_and_set_bit(flag, (unsigned long *)&ti->flags);
|
|
}
|
|
|
|
static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag)
|
|
{
|
|
return test_and_clear_bit(flag, (unsigned long *)&ti->flags);
|
|
}
|
|
|
|
static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
|
|
{
|
|
return test_bit(flag, (unsigned long *)&ti->flags);
|
|
}
|
|
|
|
#define set_thread_flag(flag) \
|
|
set_ti_thread_flag(current_thread_info(), flag)
|
|
#define clear_thread_flag(flag) \
|
|
clear_ti_thread_flag(current_thread_info(), flag)
|
|
#define update_thread_flag(flag, value) \
|
|
update_ti_thread_flag(current_thread_info(), flag, value)
|
|
#define test_and_set_thread_flag(flag) \
|
|
test_and_set_ti_thread_flag(current_thread_info(), flag)
|
|
#define test_and_clear_thread_flag(flag) \
|
|
test_and_clear_ti_thread_flag(current_thread_info(), flag)
|
|
#define test_thread_flag(flag) \
|
|
test_ti_thread_flag(current_thread_info(), flag)
|
|
|
|
#ifdef CONFIG_GENERIC_ENTRY
|
|
#define set_syscall_work(fl) \
|
|
set_bit(SYSCALL_WORK_BIT_##fl, ¤t_thread_info()->syscall_work)
|
|
#define test_syscall_work(fl) \
|
|
test_bit(SYSCALL_WORK_BIT_##fl, ¤t_thread_info()->syscall_work)
|
|
#define clear_syscall_work(fl) \
|
|
clear_bit(SYSCALL_WORK_BIT_##fl, ¤t_thread_info()->syscall_work)
|
|
|
|
#define set_task_syscall_work(t, fl) \
|
|
set_bit(SYSCALL_WORK_BIT_##fl, &task_thread_info(t)->syscall_work)
|
|
#define test_task_syscall_work(t, fl) \
|
|
test_bit(SYSCALL_WORK_BIT_##fl, &task_thread_info(t)->syscall_work)
|
|
#define clear_task_syscall_work(t, fl) \
|
|
clear_bit(SYSCALL_WORK_BIT_##fl, &task_thread_info(t)->syscall_work)
|
|
|
|
#else /* CONFIG_GENERIC_ENTRY */
|
|
|
|
#define set_syscall_work(fl) \
|
|
set_ti_thread_flag(current_thread_info(), TIF_##fl)
|
|
#define test_syscall_work(fl) \
|
|
test_ti_thread_flag(current_thread_info(), TIF_##fl)
|
|
#define clear_syscall_work(fl) \
|
|
clear_ti_thread_flag(current_thread_info(), TIF_##fl)
|
|
|
|
#define set_task_syscall_work(t, fl) \
|
|
set_ti_thread_flag(task_thread_info(t), TIF_##fl)
|
|
#define test_task_syscall_work(t, fl) \
|
|
test_ti_thread_flag(task_thread_info(t), TIF_##fl)
|
|
#define clear_task_syscall_work(t, fl) \
|
|
clear_ti_thread_flag(task_thread_info(t), TIF_##fl)
|
|
#endif /* !CONFIG_GENERIC_ENTRY */
|
|
|
|
#define tif_need_resched() test_thread_flag(TIF_NEED_RESCHED)
|
|
|
|
#ifndef CONFIG_HAVE_ARCH_WITHIN_STACK_FRAMES
|
|
static inline int arch_within_stack_frames(const void * const stack,
|
|
const void * const stackend,
|
|
const void *obj, unsigned long len)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_HARDENED_USERCOPY
|
|
extern void __check_object_size(const void *ptr, unsigned long n,
|
|
bool to_user);
|
|
|
|
static __always_inline void check_object_size(const void *ptr, unsigned long n,
|
|
bool to_user)
|
|
{
|
|
if (!__builtin_constant_p(n))
|
|
__check_object_size(ptr, n, to_user);
|
|
}
|
|
#else
|
|
static inline void check_object_size(const void *ptr, unsigned long n,
|
|
bool to_user)
|
|
{ }
|
|
#endif /* CONFIG_HARDENED_USERCOPY */
|
|
|
|
extern void __compiletime_error("copy source size is too small")
|
|
__bad_copy_from(void);
|
|
extern void __compiletime_error("copy destination size is too small")
|
|
__bad_copy_to(void);
|
|
|
|
static inline void copy_overflow(int size, unsigned long count)
|
|
{
|
|
WARN(1, "Buffer overflow detected (%d < %lu)!\n", size, count);
|
|
}
|
|
|
|
static __always_inline __must_check bool
|
|
check_copy_size(const void *addr, size_t bytes, bool is_source)
|
|
{
|
|
int sz = __compiletime_object_size(addr);
|
|
if (unlikely(sz >= 0 && sz < bytes)) {
|
|
if (!__builtin_constant_p(bytes))
|
|
copy_overflow(sz, bytes);
|
|
else if (is_source)
|
|
__bad_copy_from();
|
|
else
|
|
__bad_copy_to();
|
|
return false;
|
|
}
|
|
if (WARN_ON_ONCE(bytes > INT_MAX))
|
|
return false;
|
|
check_object_size(addr, bytes, is_source);
|
|
return true;
|
|
}
|
|
|
|
#ifndef arch_setup_new_exec
|
|
static inline void arch_setup_new_exec(void) { }
|
|
#endif
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _LINUX_THREAD_INFO_H */
|