traps.h

Go to the documentation of this file.

#ifndef _ASMARM_TRAP_H
#define _ASMARM_TRAP_H

#include <linux/list.h>

struct pt_regs;
struct task_struct;

struct undef_hook {
    struct list_head node;
    u32 instr_mask;
    u32 instr_val;
    u32 cpsr_mask;
    u32 cpsr_val;
    int (*fn)(struct pt_regs *regs, unsigned int instr);
};

void register_undef_hook(struct undef_hook *hook);
void unregister_undef_hook(struct undef_hook *hook);

#ifdef CONFIG_FUNCTION_GRAPH_TRACER
static inline int __in_irqentry_text(unsigned long ptr)
{
    extern char __irqentry_text_start[];
    extern char __irqentry_text_end[];

    return ptr >= (unsigned long)&__irqentry_text_start &&
           ptr < (unsigned long)&__irqentry_text_end;
}
#else
static inline int __in_irqentry_text(unsigned long ptr)
{
    return 0;
}
#endif

static inline int in_exception_text(unsigned long ptr)
{
    extern char __exception_text_start[];
    extern char __exception_text_end[];
    int in;

    in = ptr >= (unsigned long)&__exception_text_start &&
         ptr < (unsigned long)&__exception_text_end;

    return in ? : __in_irqentry_text(ptr);
}

extern void __init early_trap_init(void *);
extern void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long frame);
extern void ptrace_break(struct task_struct *tsk, struct pt_regs *regs);

extern void *vectors_page;

#endif