forked from OSchip/llvm-project
495a031ce4
I hope this is the last fix for x64 relocations as I've wasted a few days on this. This caused a mysterious issue that some C++ programs crash on startup. It was because a null pointer is passed as argv to main. __tmainCRTStartup calls main, but before that it calls all initialization routines between .text$xc_a and .text$xc_z. pre_cpp_init is one of such routines, and it is the one who initializes a heap pointer for argv for later use. That routine was not called for some reason. It turned out that __tmainCRTStartup was skipping a block of code because of the relocation bug. A condition in the function depends on a memory load, and that memory load was referring a wrong location. As a result a jump instruction took the wrong branch, skipping pre_cpp_init and so on. This patch fixes the issue. Also added more tests to fix them once and for all. llvm-svn: 216772 |
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