106 lines
2.4 KiB
C
106 lines
2.4 KiB
C
|
/*
|
||
|
|
* arch/arm/kernel/kprobes-common.c
|
||
|
|
*
|
||
|
|
* Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License version 2 as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/kprobes.h>
|
||
|
|
|
||
|
|
#include "kprobes.h"
|
||
|
|
|
||
|
|
|
||
|
|
static unsigned long __kprobes __check_eq(unsigned long cpsr)
|
||
|
|
{
|
||
|
|
return cpsr & PSR_Z_BIT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned long __kprobes __check_ne(unsigned long cpsr)
|
||
|
|
{
|
||
|
|
return (~cpsr) & PSR_Z_BIT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned long __kprobes __check_cs(unsigned long cpsr)
|
||
|
|
{
|
||
|
|
return cpsr & PSR_C_BIT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned long __kprobes __check_cc(unsigned long cpsr)
|
||
|
|
{
|
||
|
|
return (~cpsr) & PSR_C_BIT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned long __kprobes __check_mi(unsigned long cpsr)
|
||
|
|
{
|
||
|
|
return cpsr & PSR_N_BIT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned long __kprobes __check_pl(unsigned long cpsr)
|
||
|
|
{
|
||
|
|
return (~cpsr) & PSR_N_BIT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned long __kprobes __check_vs(unsigned long cpsr)
|
||
|
|
{
|
||
|
|
return cpsr & PSR_V_BIT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned long __kprobes __check_vc(unsigned long cpsr)
|
||
|
|
{
|
||
|
|
return (~cpsr) & PSR_V_BIT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned long __kprobes __check_hi(unsigned long cpsr)
|
||
|
|
{
|
||
|
|
cpsr &= ~(cpsr >> 1); /* PSR_C_BIT &= ~PSR_Z_BIT */
|
||
|
|
return cpsr & PSR_C_BIT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned long __kprobes __check_ls(unsigned long cpsr)
|
||
|
|
{
|
||
|
|
cpsr &= ~(cpsr >> 1); /* PSR_C_BIT &= ~PSR_Z_BIT */
|
||
|
|
return (~cpsr) & PSR_C_BIT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned long __kprobes __check_ge(unsigned long cpsr)
|
||
|
|
{
|
||
|
|
cpsr ^= (cpsr << 3); /* PSR_N_BIT ^= PSR_V_BIT */
|
||
|
|
return (~cpsr) & PSR_N_BIT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned long __kprobes __check_lt(unsigned long cpsr)
|
||
|
|
{
|
||
|
|
cpsr ^= (cpsr << 3); /* PSR_N_BIT ^= PSR_V_BIT */
|
||
|
|
return cpsr & PSR_N_BIT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned long __kprobes __check_gt(unsigned long cpsr)
|
||
|
|
{
|
||
|
|
unsigned long temp = cpsr ^ (cpsr << 3); /* PSR_N_BIT ^= PSR_V_BIT */
|
||
|
|
temp |= (cpsr << 1); /* PSR_N_BIT |= PSR_Z_BIT */
|
||
|
|
return (~temp) & PSR_N_BIT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned long __kprobes __check_le(unsigned long cpsr)
|
||
|
|
{
|
||
|
|
unsigned long temp = cpsr ^ (cpsr << 3); /* PSR_N_BIT ^= PSR_V_BIT */
|
||
|
|
temp |= (cpsr << 1); /* PSR_N_BIT |= PSR_Z_BIT */
|
||
|
|
return temp & PSR_N_BIT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned long __kprobes __check_al(unsigned long cpsr)
|
||
|
|
{
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
kprobe_check_cc * const kprobe_condition_checks[16] = {
|
||
|
|
&__check_eq, &__check_ne, &__check_cs, &__check_cc,
|
||
|
|
&__check_mi, &__check_pl, &__check_vs, &__check_vc,
|
||
|
|
&__check_hi, &__check_ls, &__check_ge, &__check_lt,
|
||
|
|
&__check_gt, &__check_le, &__check_al, &__check_al
|
||
|
|
};
|