http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54568
Bug #: 54568
Summary: Unused codes in unwind-dw2-fde.c on PT_GNU_EH_FRAME
targets
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: hjl.to...@gmail.com
From
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24724#c15
--
On a system whose linker supports --eh-frame-hdr, we will use the version of
_Unwind_Find_FDE in unwind-dw2-fde-dip.c. It will override the version in
unwind-dw2-fde.c by renaming it via #define. This file is selected by
libgcc/config/t-eh-dw2-dip. It will still call the version of
_Unwind_Find_FDE, but that function will only look through files registered by
__register_frame_info_bases. __register_frame_info_bases is called by
crtstuff.c, but it is only called on systems whose linker does not support
--eh-frame-hdr.
--
On PT_GNU_EH_FRAME targets, even __register_frame_info_bases isn't
defined/used, we still include unwind-dw2-fde.c and call its
_Unwind_Find_FDE as _Unwind_Find_registered_FDE. Should we skip
the whole thing?
