forked from OSchip/llvm-project
a085c23aa3
This commit modifies stepWithDwarf allowing for CFI directives to specify the value of the stack pointer. Previously, the SP would be unconditionally set to the CFA, because it (wrongly) stated that the CFA is the stack pointer at the call site of a function, but that is not always true. One situation in which that is false, is for example if you have switched stacks. In that case if you set the CFA to the SP before switching the stack, the CFA would be far away from where the current call frame is located. The CFA always points to the current call frame, and that call frame could have a CFI directive that specifies how to restore the stack pointer. If not, it is OK to fallback and set the SP = CFA. This change sets SP = CFA before restoring the registers during unwinding, allowing the stack frame to be restored with a value different than the CFA. Reviewed By: #libunwind, phosek Differential Revision: https://reviews.llvm.org/D106626 |
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| cmake | ||
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| .clang-format | ||
| CMakeLists.txt | ||
| LICENSE.TXT | ||