Hi, I have a problem understanding the purpose of the following relocation:
8359178: b8 50 0b 36 08 mov $0x8360b50,%eax
8359179: R_386_32
_ZNK13LaplaceSolver6SolverILi3EE15assemble_matrixERNS1_12LinearSystemERK18TriaActiveIteratorILi3E15
DoFCellAccessorILi3EEES9_RN7Threads16DummyThreadMutexE
835917d: a8 01 test $0x1,%al
835917f: 0f 84 c2 02 00 00 je 8359447
<_ZN13LaplaceSolver6SolverILi3EE22assemble_linear_systemERNS1_12LinearSystemE+0x377>
It appears to me that whether or not to jump depends on the address
0x8360b50 (and not the value in it).
And there's a relocation which means, if for some reason relocation target
will move, the address will change and the test instruction results will be
different.
Now, I need to do a code reordering, which causes what I described above.
Normally linker relocations help resolve such problems, but here it seems
that this relocation causes unpredicted program behaviour as a result of a
code reordering.
The binary is compiled with
g++ -O3 --fomit-frame-pointer -Wl,-q
g++ version 4.2.0
Thanks in advance
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