CVS commit: src/sys/lib/libunwind

["Joerg Sonnenberger" <joerg%netbsd.org@localhost>]

Module Name:    src
Committed By:   joerg
Date:           Thu Mar 20 01:35:45 UTC 2014

Modified Files:
        src/sys/lib/libunwind: UnwindCursor.hpp libunwind.cxx

Log Message:
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 _Unwind_SetIP no longer makes sense.


To generate a diff of this commit:
cvs rdiff -u -r1.1 -r1.2 src/sys/lib/libunwind/UnwindCursor.hpp
cvs rdiff -u -r1.4 -r1.5 src/sys/lib/libunwind/libunwind.cxx

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.