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Modifying GCC's emitted assembly code
- From: Amittai Aviram <amittai dot aviram at yale dot edu>
- To: gcc-help at gcc dot gnu dot org
- Date: Sun, 20 Nov 2011 00:32:16 -0500
- Subject: Modifying GCC's emitted assembly code
I have been creating a modified version of GCC's libgomp library to support a special version of OpenMP. In order for it to work properly, at the end of the main function in an OpenMP program, I have to insert a call to a special clean-up function (say, "clean_up()"), just before the "return" statement. (I define my clean_up function in my version of libgomp.) I would like to modify GCC so that it inserts the call to clean_u automatically, just before the code representing the return statement, such as the RET instruction in x86 assembly code. How might I go about this?
Alternatively, it might work if GCC inserted the function call into the boilerplate code of __exit. How might I enable GCC to do that?
Thanks a lot!
Amittai Aviram
PhD Student in Computer Science
Yale University
646 483 2639
amittai.aviram@yale.edu
http://www.amittai.com