2002-10-08 Petr Sorfa <petrs@caldera.com>

2002-10-08  Petr Sorfa <petrs@caldera.com>

Revised and re-submitted by John Wolfe <jlw@caldera.com>

Move the Dwarf 2 abbrev table to a per-compilation-unit structure,
so we can work on more than one compilation unit at a time.  This
helps prepare GDB to handle inter-CU die references.
* dwarf2read.c (ABBREV_HASH_SIZE): moved definition forward in
the code to be defined before struct comp_unit_head.
(comp_unit_head): Added new members - offset, cu_head,
begin_die, next and dwarf2_abbrevs.
(dwarf2_abbrevs): Removed single static var; now member of
struct comp_unit_head.
dwarf2_build_psymtabs_hard): Complete new struct comp_unit_head
members.
(psymtab_to_symtab_1): Changed to work with the new
struct comp_unit_head.
(dwarf2_read_abbrevs): Now accepts a cu_header parameter and
constructs the dwarf2_abbrevs[] inside the cu_header.
(dwarf2_empty_abbrev_table): Now expects a ptr to a
dwarf2_abbrev table to clean up.
(dwarf2_lookup_abbrev): Now accepts a cu_header parameter and
handling of dwarf2_abbrevs inside the cu_header.
(read_partial_die): Now supports the call to the new
dwarf2_lookup_abbrev.
(read_full_die): Now supports the call to the new
dwarf2_lookup_abbrev.