It seems that the libs are automatically mapped as private, so now I
don't know the reason of this alteration :/
open("/usr/lib/libm.so", O_RDONLY) = 3
read(3, "[EMAIL PROTECTED]"..., 512) = 512
brk(0) = 0x804a000
brk(0x806b000) = 0x806b000
fstat64(3, {st_mode=S_IFREG|0644, st_size=145232, ...}) = 0
mmap2(NULL, 147584, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0xb7df3000
mmap2(0xb7e16000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x22) = 0xb7e16000
2008/5/21 pancake <[EMAIL PROTECTED]>:
> Do you know how to private map libs with dlopen?
>
> On Wed, 2008-05-21 at 15:17 +0000, sKUrZ0 wrote:
>> you can avoid this problem it by creating new files instead of
>> rewriting the same file (so new dlopen calls will open the correct
>> library).
>> BTW I think that libraries could also be mapped as private instead of
>> shared, so changes on the .so will not affect the running program with
>> the loaded library.
>>
>> 2008/5/21 pancake <[EMAIL PROTECTED]>:
>> > On Wed, 2008-05-21 at 12:38 +0200, sha0 sha0 wrote:
>> >> Hi,
>> >>
>> >> If radare is being used, and then apply changes with "make install",
>> >> when radare tryes to do a debug_close() a segfault will appear.
>> >>
>> >
>> > Thats not a bug, thats normal. this happens with all dynamic libraries,
>> > they are mapped in memory, so any disk change will alter all the running
>> > process with dlopened files.
>> >
>> > I dont know if it's exploitable, but is cool :)
>> >
>> > I found this 'feature' few days while working with gstreamer pipelines
>> > and reinstalling plugins on top of one of the running ones. Producing
>> > random segmentation faults and exceptions. (maybe putting a
>> > fullbreakpointed library will make the process trap) :)
>> >
>> > Did you ever played with this? Looks interesting .. dynamic library code
>> > injection in runtime. ;)
>> >
>> >> The cause is this Makefile's line:
>> >>
>> >> -cp -rf src/plug/hack/*.${SHARED_EXT} ${LIBDIR}/radare
>> >
>> >
>> > I have changed the ABI, so you need to make clean before.
>> >
>> > --pancake
>> > _______________________________________________
>> > radare mailing list
>> > [email protected]
>> > http://lists.nopcode.org/listinfo.cgi/radare-nopcode.org
>> >
>>
>>
>>
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>
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====
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