binutils-gdb/gdb/hppabsd-tdep.c

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/* Target-dependent code for HP PA-RISC BSD's.
Copyright (C) 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "objfiles.h"
#include "target.h"
#include "value.h"
#include "elf/common.h"
#include "hppa-tdep.h"
#include "solib-svr4.h"
CORE_ADDR
hppabsd_find_global_pointer (struct gdbarch *gdbarch, struct value *function)
{
CORE_ADDR faddr = value_as_address (function);
struct obj_section *faddr_sec;
gdb_byte buf[4];
/* Is this a plabel? If so, dereference it to get the Global Pointer
value. */
if (faddr & 2)
{
if (target_read_memory ((faddr & ~3) + 4, buf, sizeof buf) == 0)
return extract_unsigned_integer (buf, sizeof buf);
}
/* If the address is in the .plt section, then the real function
hasn't yet been fixed up by the linker so we cannot determine the
Global Pointer for that function. */
if (in_plt_section (faddr, NULL))
return 0;
faddr_sec = find_pc_section (faddr);
if (faddr_sec != NULL)
{
struct obj_section *sec;
ALL_OBJFILE_OSECTIONS (faddr_sec->objfile, sec)
{
if (strcmp (sec->the_bfd_section->name, ".dynamic") == 0)
break;
}
if (sec < faddr_sec->objfile->sections_end)
{
CORE_ADDR addr = obj_section_addr (sec);
CORE_ADDR endaddr = obj_section_endaddr (sec);
while (addr < endaddr)
{
gdb_byte buf[4];
LONGEST tag;
if (target_read_memory (addr, buf, sizeof buf) != 0)
break;
tag = extract_signed_integer (buf, sizeof buf);
if (tag == DT_PLTGOT)
{
CORE_ADDR pltgot;
if (target_read_memory (addr + 4, buf, sizeof buf) != 0)
break;
/* The NetBSD/OpenBSD ld.so doesn't relocate DT_PLTGOT, so
we have to do it ourselves. */
pltgot = extract_unsigned_integer (buf, sizeof buf);
pltgot += ANOFFSET (sec->objfile->section_offsets,
SECT_OFF_TEXT (sec->objfile));
return pltgot;
}
if (tag == DT_NULL)
break;
addr += 8;
}
}
}
return 0;
}
void
hppabsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
/* OpenBSD and NetBSD have a 64-bit 'long double'. */
set_gdbarch_long_double_bit (gdbarch, 64);
* doublest.c (floatformat_from_length): Use the right element from gdbarch floatformats. (floatformat_from_type, extract_typed_floating) (store_typed_floating): Likewise. * doublest.h: Remove declarations for undefined floatformat arrays. * gdbarch.sh (float_format, double_format, long_double_format): Change to pairs. (pformat): Update for pairs. * gdbarch.c, gdbarch.h: Regenerated. * gdbtypes.c (floatformats_ieee_single, floatformats_ieee_double) (floatformats_ieee_double_littlebyte_bigword) (floatformats_i387_ext, floatformats_m68881_ext, floatformats_arm_ext) (floatformats_ia64_spill, floatformats_ia64_quad, floatformats_vax_f) (floatformats_vax_d): New variables. (builtin_type_ieee_single, builtin_type_ieee_double) (builtin_type_arm_ext, builtin_type_ia64_spill) (builtin_type_ia64_quad): Replace arrays with individual types. (builtin_type_ieee_single_big, builtin_type_ieee_single_little) (builtin_type_ieee_double_big, builtin_type_ieee_double_little) (builtin_type_ieee_double_littlebyte_bigword, builtin_type_i960_ext) (builtin_type_m88110_ext, builtin_type_m88110_harris_ext) (builtin_type_arm_ext_big, builtin_type_arm_ext_littlebyte_bigword) (builtin_type_ia64_spill_big, builtin_type_ia64_spill_little) (builtin_type_ia64_quad_big, builtin_type_ia64_quad_little): Delete unused and endian-specific types. (recursive_dump_type): Update for floatformat pairs. (build_flt): Move higher. Handle bit == -1. Take a floatformat pair. (build_gdbtypes): Use build_flt. (_initialize_gdbtypes): Update set of initialized types. * gdbtypes.h: Update declarations to match gdbtypes.c. (struct main_type): Store a pointer to two floatformats. * arch-utils.c (default_float_format, default_double_format): Delete. * arch-utils.h (default_float_format, default_double_format): Delete. * arm-tdep.c, avr-tdep.c, hppa-tdep.c, hppabsd-tdep.c, i386-tdep.c, ia64-tdep.c, iq2000-tdep.c, m68k-tdep.c, m88k-tdep.c, mips-linux-tdep.c, mips-tdep.c, mt-tdep.c, ppcobsd-tdep.c, sparc-linux-tdep.c, sparc-tdep.c, sparcnbsd-tdep.c, spu-tdep.c, vax-tdep.c, alpha-tdep.c, ppc-sysv-tdep.c: Update.
2007-01-29 18:31:06 +01:00
set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double);
/* OpenBSD and NetBSD use ELF. */
tdep->is_elf = 1;
tdep->find_global_pointer = hppabsd_find_global_pointer;
tdep->in_solib_call_trampoline = hppa_in_solib_call_trampoline;
set_gdbarch_skip_trampoline_code (gdbarch, hppa_skip_trampoline_code);
/* OpenBSD and NetBSD use SVR4-style shared libraries. */
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
}