diff options
Diffstat (limited to 'arch/arm/include/asm/thread_info.h')
| -rw-r--r-- | arch/arm/include/asm/thread_info.h | 69 |
1 files changed, 36 insertions, 33 deletions
diff --git a/arch/arm/include/asm/thread_info.h b/arch/arm/include/asm/thread_info.h index 70d4cbc49ae1..943ffcf069d2 100644 --- a/arch/arm/include/asm/thread_info.h +++ b/arch/arm/include/asm/thread_info.h @@ -25,13 +25,22 @@ #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) #define THREAD_START_SP (THREAD_SIZE - 8) +#ifdef CONFIG_VMAP_STACK +#define THREAD_ALIGN (2 * THREAD_SIZE) +#else +#define THREAD_ALIGN THREAD_SIZE +#endif + +#define OVERFLOW_STACK_SIZE SZ_4K + #ifndef __ASSEMBLY__ struct task_struct; -#include <asm/types.h> +DECLARE_PER_CPU(struct task_struct *, __entry_task); -typedef unsigned long mm_segment_t; +#include <asm/types.h> +#include <asm/traps.h> struct cpu_context_save { __u32 r4; @@ -54,20 +63,11 @@ struct cpu_context_save { struct thread_info { unsigned long flags; /* low level flags */ int preempt_count; /* 0 => preemptable, <0 => bug */ - mm_segment_t addr_limit; /* address limit */ - struct task_struct *task; /* main task structure */ __u32 cpu; /* cpu */ __u32 cpu_domain; /* cpu domain */ -#ifdef CONFIG_STACKPROTECTOR_PER_TASK - unsigned long stack_canary; -#endif struct cpu_context_save cpu_context; /* cpu context */ - __u32 syscall; /* syscall number */ - __u8 used_cp[16]; /* thread used copro */ + __u32 abi_syscall; /* ABI type and syscall nr */ unsigned long tp_value[2]; /* TLS registers */ -#ifdef CONFIG_CRUNCH - struct crunch_state crunchstate; -#endif union fp_state fpstate __attribute__((aligned(8))); union vfp_state vfpstate; #ifdef CONFIG_ARM_THUMBEE @@ -77,21 +77,13 @@ struct thread_info { #define INIT_THREAD_INFO(tsk) \ { \ - .task = &tsk, \ .flags = 0, \ .preempt_count = INIT_PREEMPT_COUNT, \ - .addr_limit = KERNEL_DS, \ } -/* - * how to get the thread information struct from C - */ -static inline struct thread_info *current_thread_info(void) __attribute_const__; - -static inline struct thread_info *current_thread_info(void) +static inline struct task_struct *thread_task(struct thread_info* ti) { - return (struct thread_info *) - (current_stack_pointer & ~(THREAD_SIZE - 1)); + return (struct task_struct *)ti; } #define thread_saved_pc(tsk) \ @@ -107,17 +99,27 @@ static inline struct thread_info *current_thread_info(void) ((unsigned long)(task_thread_info(tsk)->cpu_context.r7)) #endif -extern void crunch_task_disable(struct thread_info *); -extern void crunch_task_copy(struct thread_info *, void *); -extern void crunch_task_restore(struct thread_info *, void *); -extern void crunch_task_release(struct thread_info *); - extern void iwmmxt_task_disable(struct thread_info *); extern void iwmmxt_task_copy(struct thread_info *, void *); extern void iwmmxt_task_restore(struct thread_info *, void *); extern void iwmmxt_task_release(struct thread_info *); extern void iwmmxt_task_switch(struct thread_info *); +extern int iwmmxt_undef_handler(struct pt_regs *, u32); + +static inline void register_iwmmxt_undef_handler(void) +{ + static struct undef_hook iwmmxt_undef_hook = { + .instr_mask = 0x0c000e00, + .instr_val = 0x0c000000, + .cpsr_mask = MODE_MASK | PSR_T_BIT, + .cpsr_val = USR_MODE, + .fn = iwmmxt_undef_handler, + }; + + register_undef_hook(&iwmmxt_undef_hook); +} + extern void vfp_sync_hwstate(struct thread_info *); extern void vfp_flush_hwstate(struct thread_info *); @@ -141,15 +143,16 @@ extern int vfp_restore_user_hwstate(struct user_vfp *, #define TIF_NEED_RESCHED 1 /* rescheduling necessary */ #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */ #define TIF_UPROBE 3 /* breakpointed or singlestepping */ -#define TIF_SYSCALL_TRACE 4 /* syscall trace active */ -#define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */ -#define TIF_SYSCALL_TRACEPOINT 6 /* syscall tracepoint instrumentation */ -#define TIF_SECCOMP 7 /* seccomp syscall filtering active */ -#define TIF_NOTIFY_SIGNAL 8 /* signal notifications exist */ +#define TIF_NOTIFY_SIGNAL 4 /* signal notifications exist */ #define TIF_USING_IWMMXT 17 #define TIF_MEMDIE 18 /* is terminating due to OOM killer */ -#define TIF_RESTORE_SIGMASK 20 +#define TIF_RESTORE_SIGMASK 19 +#define TIF_SYSCALL_TRACE 20 /* syscall trace active */ +#define TIF_SYSCALL_AUDIT 21 /* syscall auditing active */ +#define TIF_SYSCALL_TRACEPOINT 22 /* syscall tracepoint instrumentation */ +#define TIF_SECCOMP 23 /* seccomp syscall filtering active */ + #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) |