Eric Fisher joefoxreal@gmail.com
Mon Mar 20 09:58:00 GMT 2006

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>As both call foo and call foo2 are represented by "e8 fc ff ff ff ",
how can the linker
>tell them apart and `backpatch' correctly? a related question is:
does opcode fc ff
>ff ff (following e8) means "address to be solved"? does opcode 00 00 00 00
>(following ff 05) means variable address to be solved"?
10:   ff 05 00 00 00 00       incl   0x0
"ff 05 00 00 00 00" is the binary code of instruction 'incl 0x0',
which corresponds to
"bar++;"

16:   e8 fc ff ff ff          call   17 <main+0x17>
1b:   e8 fc ff ff ff          call   1c <main+0x1c>
These correspond to "foo();       foo2();". The called function
address are of relocation address with the specified relocation type.
You can use 'objdump -r' to
learn this. Because the linker hasn't relocate the correct address to
them, so the
binary code of them are the same for now. BFD tells more about this.

Eric.

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