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my_var
2015 Aug 05
2
[LLVMdev] Cc llvmdev: Re: llvm bpf debug info. Re: [RFC PATCH v4 3/3] bpf: Introduce function for outputing data to perf event
...ing.
>>>
>>
>> Kernel side verifier allows us to do arithmetic computation using two
>> local variable
>> address or local variable address and R11. Therefore, we can compute
>> the location
>> of a local variable using:
>>
>> mark = &my_var_a - __builtin_frame_address(0);
>>
>> If the stack allocation is fixed (if the location is never reused),
>> the above 'mark'
>> can be uniquely identify a local variable. That's why I'm interesting
>> in it. However
>> I'm not sure whether th...