* - Incorporating suggestions made by Linus Torvalds and Dave Miller
*/
-#ifndef _ASM_X86_THREAD_INFO_H
-#define _ASM_X86_THREAD_INFO_H
+#ifndef ASM_X86__THREAD_INFO_H
+#define ASM_X86__THREAD_INFO_H
-#ifdef CONFIG_X86_32
#include <linux/compiler.h>
#include <asm/page.h>
-
-#ifndef __ASSEMBLY__
-#include <asm/processor.h>
-#endif
+#include <asm/types.h>
/*
* low level task data that entry.S needs immediate access to
* - this struct should fit entirely inside of one cache line
* - this struct shares the supervisor stack pages
- * - if the contents of this structure are changed,
- * the assembly constants must also be changed
*/
#ifndef __ASSEMBLY__
+struct task_struct;
+struct exec_domain;
+#include <asm/processor.h>
struct thread_info {
struct task_struct *task; /* main task structure */
struct exec_domain *exec_domain; /* execution domain */
unsigned long flags; /* low level flags */
- unsigned long status; /* thread-synchronous flags */
+ __u32 status; /* thread synchronous flags */
__u32 cpu; /* current CPU */
int preempt_count; /* 0 => preemptable,
<0 => BUG */
- mm_segment_t addr_limit; /* thread address space:
- 0-0xBFFFFFFF user-thread
- 0-0xFFFFFFFF kernel-thread
- */
- void *sysenter_return;
+ mm_segment_t addr_limit;
struct restart_block restart_block;
+ void __user *sysenter_return;
+#ifdef CONFIG_X86_32
unsigned long previous_esp; /* ESP of the previous stack in
case of nested (IRQ) stacks
*/
__u8 supervisor_stack[0];
-};
-
-#else /* !__ASSEMBLY__ */
-
-#include <asm/asm-offsets.h>
-
-#endif
-
-#define PREEMPT_ACTIVE 0x10000000
-#ifdef CONFIG_4KSTACKS
-#define THREAD_SIZE (4096)
-#else
-#define THREAD_SIZE (8192)
#endif
-
-#define STACK_WARN (THREAD_SIZE/8)
-/*
- * macros/functions for gaining access to the thread information structure
- *
- * preempt_count needs to be 1 initially, until the scheduler is functional.
- */
-#ifndef __ASSEMBLY__
+};
#define INIT_THREAD_INFO(tsk) \
{ \
#define init_thread_info (init_thread_union.thread_info)
#define init_stack (init_thread_union.stack)
-
-/* how to get the current stack pointer from C */
-register unsigned long current_stack_pointer asm("esp") __used;
-
-/* how to get the thread information struct from C */
-static inline struct thread_info *current_thread_info(void)
-{
- return (struct thread_info *)
- (current_stack_pointer & ~(THREAD_SIZE - 1));
-}
-
-/* thread information allocation */
-#ifdef CONFIG_DEBUG_STACK_USAGE
-#define alloc_thread_info(tsk) ((struct thread_info *) \
- __get_free_pages(GFP_KERNEL | __GFP_ZERO, get_order(THREAD_SIZE)))
-#else
-#define alloc_thread_info(tsk) ((struct thread_info *) \
- __get_free_pages(GFP_KERNEL, get_order(THREAD_SIZE)))
-#endif
-
#else /* !__ASSEMBLY__ */
-/* how to get the thread information struct from ASM */
-#define GET_THREAD_INFO(reg) \
- movl $-THREAD_SIZE, reg; \
- andl %esp, reg
-
-/* use this one if reg already contains %esp */
-#define GET_THREAD_INFO_WITH_ESP(reg) \
- andl $-THREAD_SIZE, reg
+#include <asm/asm-offsets.h>
#endif
/*
* thread information flags
- * - these are process state flags that various
- * assembly files may need to access
+ * - these are process state flags that various assembly files
+ * may need to access
* - pending work-to-be-done flags are in LSW
* - other flags in MSW
+ * Warning: layout of LSW is hardcoded in entry.S
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_SIGPENDING 1 /* signal pending */
-#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
-#define TIF_SINGLESTEP 3 /* restore singlestep on return to
- user mode */
-#define TIF_IRET 4 /* return with iret */
-#define TIF_SYSCALL_EMU 5 /* syscall emulation active */
-#define TIF_SYSCALL_AUDIT 6 /* syscall auditing active */
-#define TIF_SECCOMP 7 /* secure computing */
-#define TIF_RESTORE_SIGMASK 8 /* restore signal mask in do_signal() */
-#define TIF_HRTICK_RESCHED 9 /* reprogram hrtick timer */
-#define TIF_MEMDIE 16
-#define TIF_DEBUG 17 /* uses debug registers */
-#define TIF_IO_BITMAP 18 /* uses I/O bitmap */
-#define TIF_FREEZE 19 /* is freezing for suspend */
-#define TIF_NOTSC 20 /* TSC is not accessible in userland */
-#define TIF_FORCED_TF 21 /* true if TF in eflags artificially */
-#define TIF_DEBUGCTLMSR 22 /* uses thread_struct.debugctlmsr */
-#define TIF_DS_AREA_MSR 23 /* uses thread_struct.ds_area_msr */
-#define TIF_BTS_TRACE_TS 24 /* record scheduling event timestamps */
+#define TIF_SIGPENDING 2 /* signal pending */
+#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
+#define TIF_SINGLESTEP 4 /* reenable singlestep on user return*/
+#define TIF_IRET 5 /* force IRET */
+#define TIF_SYSCALL_EMU 6 /* syscall emulation active */
+#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
+#define TIF_SECCOMP 8 /* secure computing */
+#define TIF_MCE_NOTIFY 10 /* notify userspace of an MCE */
+#define TIF_NOTSC 16 /* TSC is not accessible in userland */
+#define TIF_IA32 17 /* 32bit process */
+#define TIF_FORK 18 /* ret_from_fork */
+#define TIF_ABI_PENDING 19
+#define TIF_MEMDIE 20
+#define TIF_DEBUG 21 /* uses debug registers */
+#define TIF_IO_BITMAP 22 /* uses I/O bitmap */
+#define TIF_FREEZE 23 /* is freezing for suspend */
+#define TIF_FORCED_TF 24 /* true if TF in eflags artificially */
+#define TIF_DEBUGCTLMSR 25 /* uses thread_struct.debugctlmsr */
+#define TIF_DS_AREA_MSR 26 /* uses thread_struct.ds_area_msr */
+#define TIF_BTS_TRACE_TS 27 /* record scheduling event timestamps */
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
-#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
+#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_IRET (1 << TIF_IRET)
#define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU)
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP (1 << TIF_SECCOMP)
-#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
-#define _TIF_HRTICK_RESCHED (1 << TIF_HRTICK_RESCHED)
+#define _TIF_MCE_NOTIFY (1 << TIF_MCE_NOTIFY)
+#define _TIF_NOTSC (1 << TIF_NOTSC)
+#define _TIF_IA32 (1 << TIF_IA32)
+#define _TIF_FORK (1 << TIF_FORK)
+#define _TIF_ABI_PENDING (1 << TIF_ABI_PENDING)
#define _TIF_DEBUG (1 << TIF_DEBUG)
#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
#define _TIF_FREEZE (1 << TIF_FREEZE)
-#define _TIF_NOTSC (1 << TIF_NOTSC)
#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
#define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
#define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
#define _TIF_BTS_TRACE_TS (1 << TIF_BTS_TRACE_TS)
+/* work to do in syscall_trace_enter() */
+#define _TIF_WORK_SYSCALL_ENTRY \
+ (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_EMU | \
+ _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | _TIF_SINGLESTEP)
+
+/* work to do in syscall_trace_leave() */
+#define _TIF_WORK_SYSCALL_EXIT \
+ (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP)
+
/* work to do on interrupt/exception return */
#define _TIF_WORK_MASK \
- (0x0000FFFF & ~(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
- _TIF_SECCOMP | _TIF_SYSCALL_EMU))
-/* work to do on any return to u-space */
-#define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)
+ (0x0000FFFF & \
+ ~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT| \
+ _TIF_SINGLESTEP|_TIF_SECCOMP|_TIF_SYSCALL_EMU))
+
+/* work to do on any return to user space */
+#define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)
+
+/* Only used for 64 bit */
+#define _TIF_DO_NOTIFY_MASK \
+ (_TIF_SIGPENDING|_TIF_MCE_NOTIFY)
/* flags to check in __switch_to() */
-#define _TIF_WORK_CTXSW \
- (_TIF_IO_BITMAP | _TIF_NOTSC | _TIF_DEBUGCTLMSR | \
- _TIF_DS_AREA_MSR | _TIF_BTS_TRACE_TS)
+#define _TIF_WORK_CTXSW \
+ (_TIF_IO_BITMAP|_TIF_DEBUGCTLMSR|_TIF_DS_AREA_MSR|_TIF_BTS_TRACE_TS| \
+ _TIF_NOTSC)
+
#define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
-#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW | _TIF_DEBUG)
+#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
+#define PREEMPT_ACTIVE 0x10000000
-/*
- * Thread-synchronous status.
- *
- * This is different from the flags in that nobody else
- * ever touches our thread-synchronous status, so we don't
- * have to worry about atomic accesses.
- */
-#define TS_USEDFPU 0x0001 /* FPU was used by this task
- this quantum (SMP) */
-#define TS_POLLING 0x0002 /* True if in idle loop
- and not sleeping */
+/* thread information allocation */
+#ifdef CONFIG_DEBUG_STACK_USAGE
+#define THREAD_FLAGS (GFP_KERNEL | __GFP_ZERO)
+#else
+#define THREAD_FLAGS GFP_KERNEL
+#endif
-#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
+#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
-#else /* X86_32 */
+#define alloc_thread_info(tsk) \
+ ((struct thread_info *)__get_free_pages(THREAD_FLAGS, THREAD_ORDER))
-#include <asm/page.h>
-#include <asm/types.h>
-#include <asm/pda.h>
+#ifdef CONFIG_X86_32
+#define STACK_WARN (THREAD_SIZE/8)
/*
- * low level task data that entry.S needs immediate access to
- * - this struct should fit entirely inside of one cache line
- * - this struct shares the supervisor stack pages
+ * macros/functions for gaining access to the thread information structure
+ *
+ * preempt_count needs to be 1 initially, until the scheduler is functional.
*/
#ifndef __ASSEMBLY__
-struct task_struct;
-struct exec_domain;
-#include <asm/processor.h>
-struct thread_info {
- struct task_struct *task; /* main task structure */
- struct exec_domain *exec_domain; /* execution domain */
- __u32 flags; /* low level flags */
- __u32 status; /* thread synchronous flags */
- __u32 cpu; /* current CPU */
- int preempt_count; /* 0 => preemptable,
- <0 => BUG */
- mm_segment_t addr_limit;
- struct restart_block restart_block;
-#ifdef CONFIG_IA32_EMULATION
- void __user *sysenter_return;
-#endif
-};
+
+/* how to get the current stack pointer from C */
+register unsigned long current_stack_pointer asm("esp") __used;
+
+/* how to get the thread information struct from C */
+static inline struct thread_info *current_thread_info(void)
+{
+ return (struct thread_info *)
+ (current_stack_pointer & ~(THREAD_SIZE - 1));
+}
+
+#else /* !__ASSEMBLY__ */
+
+/* how to get the thread information struct from ASM */
+#define GET_THREAD_INFO(reg) \
+ movl $-THREAD_SIZE, reg; \
+ andl %esp, reg
+
+/* use this one if reg already contains %esp */
+#define GET_THREAD_INFO_WITH_ESP(reg) \
+ andl $-THREAD_SIZE, reg
+
#endif
+#else /* X86_32 */
+
+#include <asm/pda.h>
+
/*
* macros/functions for gaining access to the thread information structure
* preempt_count needs to be 1 initially, until the scheduler is functional.
*/
#ifndef __ASSEMBLY__
-#define INIT_THREAD_INFO(tsk) \
-{ \
- .task = &tsk, \
- .exec_domain = &default_exec_domain, \
- .flags = 0, \
- .cpu = 0, \
- .preempt_count = 1, \
- .addr_limit = KERNEL_DS, \
- .restart_block = { \
- .fn = do_no_restart_syscall, \
- }, \
-}
-
-#define init_thread_info (init_thread_union.thread_info)
-#define init_stack (init_thread_union.stack)
-
static inline struct thread_info *current_thread_info(void)
{
struct thread_info *ti;
return ti;
}
-/* thread information allocation */
-#ifdef CONFIG_DEBUG_STACK_USAGE
-#define THREAD_FLAGS (GFP_KERNEL | __GFP_ZERO)
-#else
-#define THREAD_FLAGS GFP_KERNEL
-#endif
-
-#define alloc_thread_info(tsk) \
- ((struct thread_info *)__get_free_pages(THREAD_FLAGS, THREAD_ORDER))
-
#else /* !__ASSEMBLY__ */
/* how to get the thread information struct from ASM */
#endif
-/*
- * thread information flags
- * - these are process state flags that various assembly files
- * may need to access
- * - pending work-to-be-done flags are in LSW
- * - other flags in MSW
- * Warning: layout of LSW is hardcoded in entry.S
- */
-#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_SINGLESTEP 4 /* reenable singlestep on user return*/
-#define TIF_IRET 5 /* force IRET */
-#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
-#define TIF_SECCOMP 8 /* secure computing */
-#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal */
-#define TIF_MCE_NOTIFY 10 /* notify userspace of an MCE */
-#define TIF_HRTICK_RESCHED 11 /* reprogram hrtick timer */
-/* 16 free */
-#define TIF_IA32 17 /* 32bit process */
-#define TIF_FORK 18 /* ret_from_fork */
-#define TIF_ABI_PENDING 19
-#define TIF_MEMDIE 20
-#define TIF_DEBUG 21 /* uses debug registers */
-#define TIF_IO_BITMAP 22 /* uses I/O bitmap */
-#define TIF_FREEZE 23 /* is freezing for suspend */
-#define TIF_FORCED_TF 24 /* true if TF in eflags artificially */
-#define TIF_DEBUGCTLMSR 25 /* uses thread_struct.debugctlmsr */
-#define TIF_DS_AREA_MSR 26 /* uses thread_struct.ds_area_msr */
-#define TIF_BTS_TRACE_TS 27 /* record scheduling event timestamps */
-#define TIF_NOTSC 28 /* TSC is not accessible in userland */
-
-#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
-#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
-#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
-#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
-#define _TIF_IRET (1 << TIF_IRET)
-#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
-#define _TIF_SECCOMP (1 << TIF_SECCOMP)
-#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
-#define _TIF_MCE_NOTIFY (1 << TIF_MCE_NOTIFY)
-#define _TIF_HRTICK_RESCHED (1 << TIF_HRTICK_RESCHED)
-#define _TIF_IA32 (1 << TIF_IA32)
-#define _TIF_FORK (1 << TIF_FORK)
-#define _TIF_ABI_PENDING (1 << TIF_ABI_PENDING)
-#define _TIF_DEBUG (1 << TIF_DEBUG)
-#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
-#define _TIF_FREEZE (1 << TIF_FREEZE)
-#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
-#define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
-#define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
-#define _TIF_BTS_TRACE_TS (1 << TIF_BTS_TRACE_TS)
-#define _TIF_NOTSC (1 << TIF_NOTSC)
-
-/* work to do on interrupt/exception return */
-#define _TIF_WORK_MASK \
- (0x0000FFFF & \
- ~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP|_TIF_SECCOMP))
-/* work to do on any return to user space */
-#define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)
-
-#define _TIF_DO_NOTIFY_MASK \
- (_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY|_TIF_HRTICK_RESCHED)
-
-/* flags to check in __switch_to() */
-#define _TIF_WORK_CTXSW \
- (_TIF_IO_BITMAP|_TIF_DEBUGCTLMSR|_TIF_DS_AREA_MSR|_TIF_BTS_TRACE_TS|_TIF_NOTSC)
-#define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
-#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
-
-#define PREEMPT_ACTIVE 0x10000000
+#endif /* !X86_32 */
/*
* Thread-synchronous status.
*/
#define TS_USEDFPU 0x0001 /* FPU was used by this task
this quantum (SMP) */
-#define TS_COMPAT 0x0002 /* 32bit syscall active */
+#define TS_COMPAT 0x0002 /* 32bit syscall active (64BIT)*/
#define TS_POLLING 0x0004 /* true if in idle loop
and not sleeping */
+#define TS_RESTORE_SIGMASK 0x0008 /* restore signal mask in do_signal() */
#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
-#endif /* !X86_32 */
-
+#ifndef __ASSEMBLY__
+#define HAVE_SET_RESTORE_SIGMASK 1
+static inline void set_restore_sigmask(void)
+{
+ struct thread_info *ti = current_thread_info();
+ ti->status |= TS_RESTORE_SIGMASK;
+ set_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags);
+}
+#endif /* !__ASSEMBLY__ */
#ifndef __ASSEMBLY__
extern void arch_task_cache_init(void);
extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
#define arch_task_cache_init arch_task_cache_init
#endif
-#endif /* _ASM_X86_THREAD_INFO_H */
+#endif /* ASM_X86__THREAD_INFO_H */
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