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Fix endianness of coverage data on big endian systems

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This commit is contained in:
Your Name 2022-07-29 17:23:30 +01:00
parent c6af98bc35
commit f2b7104cd6
2 changed files with 8 additions and 1 deletions
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3
frida_mode/README.md
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@ -151,6 +151,7 @@ instances run CMPLOG mode and instrumentation of the binary is less frequent
* `AFL_FRIDA_INST_DEBUG_FILE` - File to write raw assembly of original blocks * `AFL_FRIDA_INST_DEBUG_FILE` - File to write raw assembly of original blocks
and their instrumented counterparts during block compilation. and their instrumented counterparts during block compilation.
```
Creating block for 0x7ffff7953313: Creating block for 0x7ffff7953313:
0x7ffff7953313 mov qword ptr [rax], 0 0x7ffff7953313 mov qword ptr [rax], 0
0x7ffff795331a add rsp, 8 0x7ffff795331a add rsp, 8
@ -166,7 +167,7 @@ Generated block 0x7ffff75e98e2
*** ***
``` ```
* `AFL_FRIDA_INST_CACHE_SIZE` - Set the size of the instrumentation cache used * `AFL_FRIDA_INST_CACHE_SIZE` - Set the size of the instrumentation cache used
as a look-up table to cache real to instrumented address block translations. as a look-up table to cache real to instrumented address block translations.
Default is 256Mb. Default is 256Mb.

6
frida_mode/src/instrument/instrument_coverage.c
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@ -317,6 +317,12 @@ static void coverage_write_events(void *key, void *value, void *user_data) {
}; };
#if (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
evt.offset = __builtin_bswap32(evt.offset);
evt.length = __builtin_bswap16(evt.length);
evt.module = __builtin_bswap16(evt.module);
#endif
coverage_write(fd, &evt, sizeof(coverage_event_t)); coverage_write(fd, &evt, sizeof(coverage_event_t));
} }