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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 | /* SPDX-License-Identifier: GPL-2.0-only */ /* * arch/arm/include/asm/thread_info.h * * Copyright (C) 2002 Russell King. */ #ifndef __ASM_ARM_THREAD_INFO_H #define __ASM_ARM_THREAD_INFO_H #ifdef __KERNEL__ #include <linux/compiler.h> #include <asm/fpstate.h> #include <asm/page.h> #ifdef CONFIG_KASAN /* * KASan uses a lot of extra stack space so the thread size order needs to * be increased. */ #define THREAD_SIZE_ORDER 2 #else #define THREAD_SIZE_ORDER 1 #endif #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; DECLARE_PER_CPU(struct task_struct *, __entry_task); #include <asm/types.h> #include <asm/traps.h> struct cpu_context_save { __u32 r4; __u32 r5; __u32 r6; __u32 r7; __u32 r8; __u32 r9; __u32 sl; __u32 fp; __u32 sp; __u32 pc; __u32 extra[2]; /* Xscale 'acc' register, etc */ }; /* * low level task data that entry.S needs immediate access to. * __switch_to() assumes cpu_context follows immediately after cpu_domain. */ struct thread_info { unsigned long flags; /* low level flags */ int preempt_count; /* 0 => preemptable, <0 => bug */ __u32 cpu; /* cpu */ __u32 cpu_domain; /* cpu domain */ struct cpu_context_save cpu_context; /* cpu context */ __u32 abi_syscall; /* ABI type and syscall nr */ unsigned long tp_value[2]; /* TLS registers */ union fp_state fpstate __attribute__((aligned(8))); union vfp_state vfpstate; #ifdef CONFIG_ARM_THUMBEE unsigned long thumbee_state; /* ThumbEE Handler Base register */ #endif }; #define INIT_THREAD_INFO(tsk) \ { \ .flags = 0, \ .preempt_count = INIT_PREEMPT_COUNT, \ } static inline struct task_struct *thread_task(struct thread_info* ti) { return (struct task_struct *)ti; } #define thread_saved_pc(tsk) \ ((unsigned long)(task_thread_info(tsk)->cpu_context.pc)) #define thread_saved_sp(tsk) \ ((unsigned long)(task_thread_info(tsk)->cpu_context.sp)) #ifndef CONFIG_THUMB2_KERNEL #define thread_saved_fp(tsk) \ ((unsigned long)(task_thread_info(tsk)->cpu_context.fp)) #else #define thread_saved_fp(tsk) \ ((unsigned long)(task_thread_info(tsk)->cpu_context.r7)) #endif 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 *); struct user_vfp; struct user_vfp_exc; extern int vfp_preserve_user_clear_hwstate(struct user_vfp *, struct user_vfp_exc *); extern int vfp_restore_user_hwstate(struct user_vfp *, struct user_vfp_exc *); #endif /* * thread information flags: * TIF_USEDFPU - FPU was used by this task this quantum (SMP) * TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED * * Any bit in the range of 0..15 will cause do_work_pending() to be invoked. */ #define TIF_SIGPENDING 0 /* signal pending */ #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_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 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) #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) #define _TIF_UPROBE (1 << TIF_UPROBE) #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) #define _TIF_SECCOMP (1 << TIF_SECCOMP) #define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL) #define _TIF_USING_IWMMXT (1 << TIF_USING_IWMMXT) /* Checks for any syscall work in entry-common.S */ #define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP) /* * Change these and you break ASM code in entry-common.S */ #define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \ _TIF_NOTIFY_RESUME | _TIF_UPROBE | \ _TIF_NOTIFY_SIGNAL) #endif /* __KERNEL__ */ #endif /* __ASM_ARM_THREAD_INFO_H */ |