tree d06427900994288ecfb7f01742d852d3ae34e0a9
parent 4fb4f2286edeef6320baa9b7ad475495f95c8c56
author Joerg Sonnenberger <joerg@bec.de> 1395278635 +0000
committer Joerg Sonnenberger <joerg@bec.de> 1395278635 +0000

Fix DW_CFA_GNU_args_size handling. The primary architecture using this
opcode is VAX. A function call pushes the number of arguments given onto
the stack and "ret" will pop it automatically. The FDE of the caller
contains the amount of stack space used for arguments (and possibly
extra padding), so unwinding has to compensate for this when "returning"
from a function. This is exactly the case when step() is done. The
existing handling in unw_set_reg no longer makes sense.


git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@204290 91177308-0d34-0410-b5e6-96231b3b80d8