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Difference between revisions of "Talk:Research: Pwnage Patches"
Caique2001 (talk | contribs) (New page: What is more important, is the code before 1800587C. Compilers translate actions like :if (condition is good) ::then into conditional jumps. What you can see with the MOV and REG is mo...) |
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| − | into conditional jumps. What you can see with the MOV and REG is most probably the result of a failed condition (-1). Afterwards it depends on the compiler, how it further treats the result. |
+ | into conditional jumps. What you can see with the MOV and REG is most probably the result of a failed condition (-1) (or failed function result). Afterwards it depends on the compiler, how it further treats the result. |
Maybe the original pseudo code is as follows: |
Maybe the original pseudo code is as follows: |
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Revision as of 21:18, 2 August 2008
What is more important, is the code before 1800587C.
Compilers translate actions like
- if (condition is good)
- then
into conditional jumps. What you can see with the MOV and REG is most probably the result of a failed condition (-1) (or failed function result). Afterwards it depends on the compiler, how it further treats the result.
Maybe the original pseudo code is as follows:
sig_check_result = do_check(important args);
...
if (sig_check_result == 0)
everything goes fine ...
...
a.s.o
So the question is, why it goes to the branch where R0 is set to -1 (patch 0) and what conditional branches lead to this code position? And the even more important question is, what is the underlying pseudo code?
