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/*
* LiME - Linux Memory Extractor
* Copyright (c) 2011-2014 Joe Sylve - 504ENSICS Labs
*
*
* Author:
* Joe Sylve - joe.sylve@gmail.com, @jtsylve
*
* 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
*/
#include "lime.h"
// This file
static int write_lime_header(struct resource *);
static int write_padding(size_t);
static int write_range(struct resource *);
static int write_vaddr(void *, size_t);
static int setup(void);
static void cleanup(void);
static int init(void);
// External
extern int write_vaddr_tcp(void *, size_t);
extern int setup_tcp(void);
extern void cleanup_tcp(void);
extern int write_vaddr_disk(void *, size_t);
extern int setup_disk(void);
extern void cleanup_disk(void);
static char * format = 0;
static int mode = 0;
static int method = 0;
static char zero_page[PAGE_SIZE];
char * path = 0;
int dio = 0;
int port = 0;
extern struct resource iomem_resource;
module_param(path, charp, S_IRUGO);
module_param(dio, int, S_IRUGO);
module_param(format, charp, S_IRUGO);
int init_module (void)
{
if(!path) {
DBG("No path parameter specified");
return -EINVAL;
}
if(!format) {
DBG("No format parameter specified");
return -EINVAL;
}
DBG("Parameters");
DBG(" PATH: %s", path);
DBG(" DIO: %u", dio);
DBG(" FORMAT: %s", format);
memset(zero_page, 0, sizeof(zero_page));
if (!strcmp(format, "raw")) mode = LIME_MODE_RAW;
else if (!strcmp(format, "lime")) mode = LIME_MODE_LIME;
else if (!strcmp(format, "padded")) mode = LIME_MODE_PADDED;
else {
DBG("Invalid format parameter specified.");
return -EINVAL;
}
method = (sscanf(path, "tcp:%d", &port) == 1) ? LIME_METHOD_TCP : LIME_METHOD_DISK;
return init();
}
static int init() {
struct resource *p;
int err = 0;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
resource_size_t p_last = -1;
#else
__PTRDIFF_TYPE__ p_last = -1;
#endif
DBG("Initilizing Dump...");
if((err = setup())) {
DBG("Setup Error");
cleanup();
return err;
}
for (p = iomem_resource.child; p ; p = p->sibling) {
if (strcmp(p->name, LIME_RAMSTR))
continue;
if (mode == LIME_MODE_LIME && (err = write_lime_header(p))) {
DBG("Error writing header 0x%lx - 0x%lx", (long) p->start, (long) p->end);
break;
} else if (mode == LIME_MODE_PADDED && (err = write_padding((size_t) ((p->start - 1) - p_last)))) {
DBG("Error writing padding 0x%lx - 0x%lx", (long) p_last, (long) p->start - 1);
break;
}
if ((err = write_range(p))) {
DBG("Error writing range 0x%lx - 0x%lx", (long) p->start, (long) p->end);
break;
}
p_last = p->end;
}
cleanup();
return err;
}
static int write_lime_header(struct resource * res) {
long s;
lime_mem_range_header header;
memset(&header, 0, sizeof(lime_mem_range_header));
header.magic = LIME_MAGIC;
header.version = 1;
header.s_addr = res->start;
header.e_addr = res->end;
s = write_vaddr(&header, sizeof(lime_mem_range_header));
if (s != sizeof(lime_mem_range_header)) {
DBG("Error sending header %ld", s);
return (int) s;
}
return 0;
}
static int write_padding(size_t s) {
size_t i = 0;
int r;
while(s -= i) {
i = min((size_t) PAGE_SIZE, s);
r = write_vaddr(zero_page, i);
if (r != i) {
DBG("Error sending zero page: %d", r);
return r;
}
}
return 0;
}
static int write_range(struct resource * res) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
resource_size_t i, is;
#else
__PTRDIFF_TYPE__ i, is;
#endif
struct page * p;
void * v;
int s;
for (i = res->start; i <= res->end; i += is) {
p = pfn_to_page((i) >> PAGE_SHIFT);
is = min((size_t) PAGE_SIZE, (size_t) (res->end - i + 1));
if (is < PAGE_SIZE) {
// We can't map partial pages and
// the linux kernel doesn't use them anyway
DBG("Padding partial page: vaddr %p size: %lu", (void *) i, is);
write_padding(is);
} else {
v = kmap(p);
s = write_vaddr(v, is);
kunmap(p);
if (s != is) {
DBG("Error writing page: vaddr %p ret: %d", v, s);
return (int) s;
}
}
}
return 0;
}
static int write_vaddr(void * v, size_t is) {
return (method == LIME_METHOD_TCP) ? write_vaddr_tcp(v, is) : write_vaddr_disk(v, is);
}
static int setup(void) {
return (method == LIME_METHOD_TCP) ? setup_tcp() : setup_disk();
}
static void cleanup(void) {
return (method == LIME_METHOD_TCP) ? cleanup_tcp() : cleanup_disk();
}
void cleanup_module(void)
{
}
MODULE_LICENSE("GPL");
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