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load c module with log

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iddoeldor 2020-06-21 17:31:36 +03:00 committed by GitHub
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@ -5,7 +5,7 @@
<details>
<summary>Native</summary>
* [`Load C++ module`](#load-cpp-module)
* [`Load C/C++ module`](#load-cpp-module)
* [`One time watchpoint`](#one-time-watchpoint)
* [`Socket activity`](#socket-activity)
* [`Intercept open`](#intercept-open)
@ -148,6 +148,43 @@ function readStdString(str) {
"abc"
```
#### Load C module
* https://frida.re/docs/javascript-api/#cmodule
* https://frida.re/news/2019/09/18/frida-12-7-released/
```sh
$ ./aarch64-linux-android21-clang /tmp/b.c -o /tmp/a -shared ../sysroot/usr/lib/aarch64-linux-android/21/liblog.so && adb push /tmp/a /data/local/tmp/a
```
```c
#include <stdio.h>
#include <stdlib.h>
#include <android/log.h>
#define TAG "TEST1"
#define LOGI(...) __android_log_print(ANDROID_LOG_INFO, TAG, __VA_ARGS__)
#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, TAG, __VA_ARGS__)
void test(void) {
FILE* fp = popen("ls -l /proc/self/fd 2>&1", "r");
if (fp == NULL)
LOGE("executing cmd failed");
char b[256];
while (fgets(b, sizeof(b), fp) != NULL) {
LOGI("%s", b);
}
pclose(fp);
}
```
```sh
$ frida -Uf com.app --no-pause --enable-jit -e "Module.load('/data/local/tmp/a')"
[ ] -> new NativeFunction(Module.findExportByName('a', 'test'), 'void', [])()
```
<br>[⬆ Back to top](#table-of-contents)