3rd-party/linux-kernel-module-cheat
1
0
Fork 0
mirror of https://github.com/cirosantilli/linux-kernel-module-cheat.git synced 2026-01-23 02:05:57 +01:00
Code Issues Releases Wiki Activity

pagemap_dump!

Browse Source
This commit is contained in:
Ciro Santilli
2017-07-15 12:37:21 +01:00
parent 105341b7ae
commit 1428e7a3b5
1 changed files with 44 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files

82
kernel_module/user/pagemap_dump.c
View File

@@ -17,7 +17,7 @@ Data sources: /proc/PIC/{map,pagemap}
#include <sys/types.h>
#define PAGE_SIZE 0x1000
int main(int argc, char *argv[]) {
int main(int argc, char **argv) {
char buffer[BUFSIZ];
char maps_file[BUFSIZ];
char pagemap_file[BUFSIZ];
@@ -26,7 +26,7 @@ int main(int argc, char *argv[]) {
int pagemap;
if (argc < 2) {
printf("Usage: %s pid1\n", argv[0]);
printf("Usage: %s pid\n", argv[0]);
return EXIT_FAILURE;
}
pid_t pid = (pid_t)strtoul(argv[1], NULL, 0);
@@ -50,45 +50,50 @@ int main(int argc, char *argv[]) {
for (size_t i = offset; i < (size_t)length; i++) {
unsigned long low = 0, high = 0;
if (buffer[i] == '\n' && i) {
size_t x = i - 1;
while(x && buffer[x] != '\n') x --;
if (buffer[x] == '\n') x++;
size_t beginning = x;
while(buffer[x] != '-' && x < sizeof buffer) {
char c = buffer[x++];
low *= 16;
if (c >= '0' && c <= '9') {
low += c - '0';
const char *lib_name;
size_t y;
/* Parse a line from maps. Each line contains a range that contains many pages. */
{
size_t x = i - 1;
while(x && buffer[x] != '\n') x --;
if (buffer[x] == '\n') x++;
size_t beginning = x;
while(buffer[x] != '-' && x < sizeof buffer) {
char c = buffer[x++];
low *= 16;
if (c >= '0' && c <= '9') {
low += c - '0';
}
else if (c >= 'a' && c <= 'f') {
low += c - 'a' + 10;
}
else break;
}
else if (c >= 'a' && c <= 'f') {
low += c - 'a' + 10;
while(buffer[x] != '-' && x < sizeof buffer) x++;
if (buffer[x] == '-') x++;
while(buffer[x] != ' ' && x < sizeof buffer) {
char c = buffer[x++];
high *= 16;
if (c >= '0' && c <= '9') {
high += c - '0';
}
else if (c >= 'a' && c <= 'f') {
high += c - 'a' + 10;
}
else break;
}
else break;
lib_name = 0;
for (int field = 0; field < 4; field++) {
x++;
while(buffer[x] != ' ' && x < sizeof buffer) x++;
}
while (buffer[x] == ' ' && x < sizeof buffer) x++;
y = x;
while (buffer[y] != '\n' && y < sizeof buffer) y++;
buffer[y] = 0;
lib_name = buffer + x;
}
while(buffer[x] != '-' && x < sizeof buffer) x++;
if (buffer[x] == '-') x++;
while(buffer[x] != ' ' && x < sizeof buffer) {
char c = buffer[x++];
high *= 16;
if (c >= '0' && c <= '9') {
high += c - '0';
}
else if (c >= 'a' && c <= 'f') {
high += c - 'a' + 10;
}
else break;
}
const char *lib_name = 0;
for (int field = 0; field < 4; field++) {
x++;
while(buffer[x] != ' ' && x < sizeof buffer) x++;
}
while (buffer[x] == ' ' && x < sizeof buffer) x++;
size_t y = x;
while (buffer[y] != '\n' && y < sizeof buffer) y++;
buffer[y] = 0;
lib_name = buffer + x;
/* Get info about all pages in this page range with pagemap. */
{
unsigned long data;
for (unsigned long i = low; i < high; i += PAGE_SIZE) {
@@ -108,6 +113,7 @@ int main(int argc, char *argv[]) {
);
}
}
buffer[y] = '\n';
}
}
}