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/*
* Dynamic Binary Instrumentation Module based on KProbes
* modules/driver/sspt/ip.c
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Copyright (C) Samsung Electronics, 2013
*
* 2013 Vyacheslav Cherkashin <v.cherkashin@samsung.com>
*
*/
#include "ip.h"
#include "sspt_page.h"
#include "sspt_file.h"
struct us_ip *create_ip(unsigned long offset)
{
struct us_ip *ip = kmalloc(sizeof(*ip), GFP_ATOMIC);
memset(ip, 0, sizeof(*ip));
INIT_LIST_HEAD(&ip->list);
ip->offset = offset;
return ip;
}
void free_ip(struct us_ip *ip)
{
kfree(ip);
}
static inline void set_ip_jp_handler(struct us_ip *ip, kprobe_pre_entry_handler_t per_entry, void *entry)
{
ip->jprobe.pre_entry = per_entry;
ip->jprobe.entry = entry;
}
static inline void set_ip_rp_handler(struct us_ip *ip, kretprobe_handler_t handler)
{
ip->flag_retprobe = 1;
ip->retprobe.handler = handler;
}
static inline void set_ip_got_addr(struct us_ip *ip, unsigned long got_addr)
{
ip->got_addr = got_addr;
}
struct us_ip *copy_ip(const struct us_ip *ip)
{
struct us_ip *new_ip = create_ip(ip->offset);
if (new_ip == NULL) {
printk("us_proc_ip_copy: No enough memory\n");
return NULL;
}
// jprobe
set_ip_jp_handler(new_ip, ip->jprobe.pre_entry, ip->jprobe.entry);
// retprobe
if (ip->flag_retprobe) {
set_ip_rp_handler(new_ip, ip->retprobe.handler);
}
return new_ip;
}
struct us_ip *create_ip_by_ip_data(struct ip_data *ip_d)
{
struct us_ip *ip = create_ip(ip_d->offset);
set_ip_jp_handler(ip, ip_d->pre_handler, (void *)ip_d->jp_handler);
if (ip_d->flag_retprobe) {
set_ip_rp_handler(ip, ip_d->rp_handler);
}
set_ip_got_addr(ip, ip_d->got_addr);
return ip;
}
void sspt_set_ip_addr(struct us_ip *ip, const struct sspt_page *page, const struct sspt_file *file)
{
unsigned long addr = file->vm_start + page->offset + ip->offset;
ip->retprobe.kp.addr = ip->jprobe.kp.addr = (kprobe_opcode_t *)addr;
}
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