Hi,

We used to have a somewhat awkward get_unwind_table interface where we
passed both the (fake) address space of the unwind table as the original
vaddr of the table. This was necessary because eh_frames contain
pc-relative addresses, so libunwind wanted to get the original address.
This patch makes it so that the address space we pass to libunwind has
the correct relative addresses, so no extra arguments are necessary for
libunwind to adjust anything.

There is one local libunwind patch necessary for now to make this work.
That is to not directly read the the personality routine address from
the CIE since it can be stored anywhere and currently we are just
feeding it the unwind table data. We still need to read the encoded
pointer to get past it. This can be restored when frysk feeds the
eh_frame through its main address space. We never use the personality
routine inside Frysk at the moment.

frysk-imports/libunwind/ChangeLog
2007-12-22  Mark Wielaard  <mwielaard@redhat.com>
    
       * include/libunwind-common.h.in (unw_get_unwind_table):
       Remove as, arg and peh_vaddr arguments.
       * src/mi/Gget_unwind_table.c (unw_get_unwind_table): Likewise.
       Create address space from eh_frame_accessors. Set rti.table_data
       and rti.segbase from eh_frame_hdr_address. Pass eh_frame_arg
       to tdep_search_unwind_table.
       * src/dwarf/Gfde.c (parse_cie): Add FRYSK LOCAL hack to not
       read personality routine address.
    
frysk-sys/lib/unwind/ChangeLog
2007-12-22  Mark Wielaard  <mwielaard@redhat.com>
    
       * cni/UnwindH.hxx (get_eh_frame_hdr_addr): Return char*.
       (createProcInfoFromElfImage): Calculate virtual and adjusted
       addresses from eh_table_hdr and peh_vaddr.

Tested on x86 and x86_64.

Committed,

Mark