/* Target-dependent code for HP PA-RISC BSD's.
- Copyright 2004 Free Software Foundation, Inc.
+ Copyright (C) 2004-2013 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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "arch-utils.h"
-#include "osabi.h"
-#include "regcache.h"
-#include "regset.h"
+#include "objfiles.h"
+#include "target.h"
+#include "value.h"
-#include "gdb_assert.h"
-#include "gdb_string.h"
+#include "elf/common.h"
#include "hppa-tdep.h"
+#include "hppabsd-tdep.h"
+#include "dwarf2-frame.h"
#include "solib-svr4.h"
-/* Core file support. */
-
-/* Sizeof `struct reg' in <machine/reg.h>. */
-#define HPPABSD_SIZEOF_GREGS (34 * 4)
-
-/* Supply register REGNUM from the buffer specified by GREGS and LEN
- in the general-purpose register set REGSET to register cache
- REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
-
-static void
-hppabsd_supply_gregset (const struct regset *regset, struct regcache *regcache,
- int regnum, const void *gregs, size_t len)
+static CORE_ADDR
+hppabsd_find_global_pointer (struct gdbarch *gdbarch, struct value *function)
{
- const char *regs = gregs;
- size_t offset;
- int i;
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ 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, byte_order);
+ }
- gdb_assert (len >= HPPABSD_SIZEOF_GREGS);
+ /* 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))
+ return 0;
- for (i = HPPA_R1_REGNUM, offset = 4; i <= HPPA_R31_REGNUM; i++, offset += 4)
+ faddr_sec = find_pc_section (faddr);
+ if (faddr_sec != NULL)
{
- if (regnum == -1 || regnum == i)
- regcache_raw_supply (regcache, i, regs + offset);
+ 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, byte_order);
+ 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,
+ byte_order);
+ pltgot += ANOFFSET (sec->objfile->section_offsets,
+ SECT_OFF_TEXT (sec->objfile));
+
+ return pltgot;
+ }
+
+ if (tag == DT_NULL)
+ break;
+
+ addr += 8;
+ }
+ }
}
- if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
- regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs);
- if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
- regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
- if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
- regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
+ return 0;
}
+\f
-/* OpenBSD/hppa register set. */
-
-static struct regset hppabsd_gregset =
-{
- NULL,
- hppabsd_supply_gregset
-};
-
-/* Return the appropriate register set for the core section identified
- by SECT_NAME and SECT_SIZE. */
-
-static const struct regset *
-hppabsd_regset_from_core_section (struct gdbarch *gdbarch,
- const char *sect_name, size_t sect_size)
+static void
+hppabsd_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum,
+ struct dwarf2_frame_state_reg *reg,
+ struct frame_info *this_frame)
{
- if (strcmp (sect_name, ".reg") == 0 && sect_size >= HPPABSD_SIZEOF_GREGS)
- return &hppabsd_gregset;
-
- return NULL;
+ if (regnum == HPPA_PCOQ_HEAD_REGNUM)
+ reg->how = DWARF2_FRAME_REG_RA;
+ else if (regnum == HPPA_SP_REGNUM)
+ reg->how = DWARF2_FRAME_REG_CFA;
}
-\f
-static void
+void
hppabsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- /* Core file support. */
- set_gdbarch_regset_from_core_section
- (gdbarch, hppabsd_regset_from_core_section);
+ /* OpenBSD and NetBSD have a 64-bit 'long double'. */
+ set_gdbarch_long_double_bit (gdbarch, 64);
+ 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 uses SVR4-style shared libraries. */
+ /* OpenBSD and NetBSD use SVR4-style shared libraries. */
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
-}
-\f
-
-/* OpenBSD uses uses the traditional NetBSD core file format, even for
- ports that use ELF. */
-#define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF
-
-static enum gdb_osabi
-hppabsd_core_osabi_sniffer (bfd *abfd)
-{
- if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
- return GDB_OSABI_NETBSD_CORE;
- return GDB_OSABI_UNKNOWN;
-}
-\f
-
-/* Provide a prototype to silence -Wmissing-prototypes. */
-void _initialize_hppabsd_tdep (void);
-
-void
-_initialize_hppabsd_tdep (void)
-{
- /* BFD doesn't set a flavour for NetBSD style a.out core files. */
- gdbarch_register_osabi_sniffer (bfd_arch_hppa, bfd_target_unknown_flavour,
- hppabsd_core_osabi_sniffer);
-
- gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_NETBSD_ELF,
- hppabsd_init_abi);
- gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_OPENBSD_ELF,
- hppabsd_init_abi);
+ /* Hook in the DWARF CFI frame unwinder. */
+ dwarf2_frame_set_init_reg (gdbarch, hppabsd_dwarf2_frame_init_reg);
+ dwarf2_append_unwinders (gdbarch);
}
projects / deliverable / binutils-gdb.git / blobdiff