2004-06-26 12:06:35 +02:00
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/* Target-dependent code for HP PA-RISC BSD's.
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2006-01-14 00:09:08 +01:00
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Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
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2004-06-26 12:06:35 +02:00
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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2005-12-17 23:34:03 +01:00
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Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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2004-06-26 12:06:35 +02:00
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#include "defs.h"
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#include "arch-utils.h"
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2005-06-21 07:32:00 +02:00
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#include "symtab.h"
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#include "objfiles.h"
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2004-06-26 12:06:35 +02:00
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#include "osabi.h"
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#include "regcache.h"
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#include "regset.h"
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2005-06-21 07:32:00 +02:00
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#include "target.h"
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#include "value.h"
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2004-06-26 12:06:35 +02:00
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#include "gdb_assert.h"
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#include "gdb_string.h"
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2005-06-21 07:32:00 +02:00
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#include "elf/common.h"
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2004-06-26 12:06:35 +02:00
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#include "hppa-tdep.h"
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#include "solib-svr4.h"
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/* Core file support. */
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/* Sizeof `struct reg' in <machine/reg.h>. */
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#define HPPABSD_SIZEOF_GREGS (34 * 4)
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/* Supply register REGNUM from the buffer specified by GREGS and LEN
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in the general-purpose register set REGSET to register cache
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REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
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static void
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hppabsd_supply_gregset (const struct regset *regset, struct regcache *regcache,
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int regnum, const void *gregs, size_t len)
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{
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2005-06-21 07:32:00 +02:00
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const gdb_byte *regs = gregs;
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2004-06-26 12:06:35 +02:00
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size_t offset;
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int i;
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gdb_assert (len >= HPPABSD_SIZEOF_GREGS);
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for (i = HPPA_R1_REGNUM, offset = 4; i <= HPPA_R31_REGNUM; i++, offset += 4)
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{
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if (regnum == -1 || regnum == i)
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regcache_raw_supply (regcache, i, regs + offset);
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}
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if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
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regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs);
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if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
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regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
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if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
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regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
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}
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/* OpenBSD/hppa register set. */
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static struct regset hppabsd_gregset =
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{
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NULL,
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hppabsd_supply_gregset
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};
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/* Return the appropriate register set for the core section identified
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by SECT_NAME and SECT_SIZE. */
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static const struct regset *
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hppabsd_regset_from_core_section (struct gdbarch *gdbarch,
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const char *sect_name, size_t sect_size)
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{
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if (strcmp (sect_name, ".reg") == 0 && sect_size >= HPPABSD_SIZEOF_GREGS)
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return &hppabsd_gregset;
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return NULL;
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}
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2005-06-21 07:32:00 +02:00
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CORE_ADDR
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hppabsd_find_global_pointer (struct value *function)
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{
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CORE_ADDR faddr = value_as_address (function);
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struct obj_section *faddr_sec;
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gdb_byte buf[4];
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/* Is this a plabel? If so, dereference it to get the Global Pointer
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value. */
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if (faddr & 2)
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{
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if (target_read_memory ((faddr & ~3) + 4, buf, sizeof buf) == 0)
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return extract_unsigned_integer (buf, sizeof buf);
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}
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/* If the address is in the .plt section, then the real function
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hasn't yet been fixed up by the linker so we cannot determine the
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Global Pointer for that function. */
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if (in_plt_section (faddr, NULL))
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return 0;
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faddr_sec = find_pc_section (faddr);
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if (faddr_sec != NULL)
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{
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struct obj_section *sec;
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ALL_OBJFILE_OSECTIONS (faddr_sec->objfile, sec)
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{
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if (strcmp (sec->the_bfd_section->name, ".dynamic") == 0)
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break;
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}
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if (sec < faddr_sec->objfile->sections_end)
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{
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CORE_ADDR addr = sec->addr;
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while (addr < sec->endaddr)
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{
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gdb_byte buf[4];
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LONGEST tag;
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if (target_read_memory (addr, buf, sizeof buf) != 0)
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break;
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tag = extract_signed_integer (buf, sizeof buf);
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if (tag == DT_PLTGOT)
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{
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CORE_ADDR pltgot;
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if (target_read_memory (addr + 4, buf, sizeof buf) != 0)
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break;
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/* The OpenBSD ld.so doesn't relocate DT_PLTGOT, so
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we have to do it ourselves. */
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pltgot = extract_unsigned_integer (buf, sizeof buf);
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pltgot += ANOFFSET (sec->objfile->section_offsets,
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SECT_OFF_TEXT (sec->objfile));
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return pltgot;
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}
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if (tag == DT_NULL)
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break;
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addr += 8;
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}
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}
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}
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return 0;
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}
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2004-06-26 12:06:35 +02:00
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static void
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hppabsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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2006-01-14 00:09:08 +01:00
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/* OpenBSD and NetBSD have a 64-bit 'long double'. */
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set_gdbarch_long_double_bit (gdbarch, 64);
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set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_big);
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2004-06-26 12:06:35 +02:00
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/* Core file support. */
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set_gdbarch_regset_from_core_section
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(gdbarch, hppabsd_regset_from_core_section);
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/* OpenBSD and NetBSD use ELF. */
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2005-06-21 07:32:00 +02:00
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tdep->find_global_pointer = hppabsd_find_global_pointer;
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2004-06-26 12:06:35 +02:00
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tdep->is_elf = 1;
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2006-01-14 00:09:08 +01:00
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/* OpenBSD and NetBSD use SVR4-style shared libraries. */
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2004-06-26 12:06:35 +02:00
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set_solib_svr4_fetch_link_map_offsets
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(gdbarch, svr4_ilp32_fetch_link_map_offsets);
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}
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/* OpenBSD uses uses the traditional NetBSD core file format, even for
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ports that use ELF. */
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#define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF
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static enum gdb_osabi
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hppabsd_core_osabi_sniffer (bfd *abfd)
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{
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if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
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return GDB_OSABI_NETBSD_CORE;
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return GDB_OSABI_UNKNOWN;
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}
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/* Provide a prototype to silence -Wmissing-prototypes. */
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void _initialize_hppabsd_tdep (void);
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void
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_initialize_hppabsd_tdep (void)
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{
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/* BFD doesn't set a flavour for NetBSD style a.out core files. */
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gdbarch_register_osabi_sniffer (bfd_arch_hppa, bfd_target_unknown_flavour,
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hppabsd_core_osabi_sniffer);
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gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_NETBSD_ELF,
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hppabsd_init_abi);
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gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_OPENBSD_ELF,
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hppabsd_init_abi);
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}
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