3rd-party/linux-kernel-module-cheat
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pagemap_dump!

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Ciro Santilli
2017-07-15 12:37:21 +01:00
parent 105341b7ae
commit 1428e7a3b5
1 changed files with 44 additions and 38 deletions
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82
kernel_module/user/pagemap_dump.c
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@@ -17,7 +17,7 @@ Data sources: /proc/PIC/{map,pagemap}
#include <sys/types.h> #include <sys/types.h>
#define PAGE_SIZE 0x1000 #define PAGE_SIZE 0x1000
int main(int argc, char *argv[]) { int main(int argc, char **argv) {
char buffer[BUFSIZ]; char buffer[BUFSIZ];
char maps_file[BUFSIZ]; char maps_file[BUFSIZ];
char pagemap_file[BUFSIZ]; char pagemap_file[BUFSIZ];
@@ -26,7 +26,7 @@ int main(int argc, char *argv[]) {
int pagemap; int pagemap;
if (argc < 2) { if (argc < 2) {
printf("Usage: %s pid1\n", argv[0]); printf("Usage: %s pid\n", argv[0]);
return EXIT_FAILURE; return EXIT_FAILURE;
} }
pid_t pid = (pid_t)strtoul(argv[1], NULL, 0); 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++) { for (size_t i = offset; i < (size_t)length; i++) {
unsigned long low = 0, high = 0; unsigned long low = 0, high = 0;
if (buffer[i] == '\n' && i) { if (buffer[i] == '\n' && i) {
size_t x = i - 1; const char *lib_name;
while(x && buffer[x] != '\n') x --; size_t y;
if (buffer[x] == '\n') x++; /* Parse a line from maps. Each line contains a range that contains many pages. */
size_t beginning = x; {
while(buffer[x] != '-' && x < sizeof buffer) { size_t x = i - 1;
char c = buffer[x++]; while(x && buffer[x] != '\n') x --;
low *= 16; if (buffer[x] == '\n') x++;
if (c >= '0' && c <= '9') { size_t beginning = x;
low += c - '0'; 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') { while(buffer[x] != '-' && x < sizeof buffer) x++;
low += c - 'a' + 10; 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++; /* Get info about all pages in this page range with pagemap. */
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;
{ {
unsigned long data; unsigned long data;
for (unsigned long i = low; i < high; i += PAGE_SIZE) { for (unsigned long i = low; i < high; i += PAGE_SIZE) {
@@ -108,6 +113,7 @@ int main(int argc, char *argv[]) {
); );
} }
} }
buffer[y] = '\n';
} }
} }
} }