Hi,
I am trying to understand a particular program-crash i am looking
at now, coming from libpthread.so library in ARM. I am using
NPTL and glibc 4.2.1
>From stack-trace , i figured that pthread_self() is being called.
>From source, I saw that this calls __builtin_thread_pointer(). This
function has been synthesized in gcc-source by a macro.
The assembly of the function __builtin_thread_pointer() ( from
objdump of lib ) looks like
mvn r0, 0xF000
sub pc, r0, 0x1F8
This does not make sense. I thought of the possibility thagt
maybe this is a address-value which gets relocated, but this is
text-region of a shared library ( libpthread) and so is not relocated.
I have 2 questions -
a) What is the meaning of the above asm code ?
b) As the program branches to invalid address 0xE8 somewhere after
pthread_self( ), what could be wrong ?
I guess this is some kind of TLS-data corruption.
I would be reading about TLS in ARM tomorrow.
Thanks
