X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fhppabsd-tdep.c;h=e690e683e58ee23215a188ee88f538505ce298df;hb=e17a4113357102b55cfa5b80557d590a46a43300;hp=0a54371527d32d975d4d64cbb13c2b02363e774a;hpb=0e56aeafa8e93c62a52a7b45d90550130285576b;p=deliverable%2Fbinutils-gdb.git
diff --git a/gdb/hppabsd-tdep.c b/gdb/hppabsd-tdep.c
index 0a54371527..e690e683e5 100644
--- a/gdb/hppabsd-tdep.c
+++ b/gdb/hppabsd-tdep.c
@@ -1,12 +1,13 @@
/* Target-dependent code for HP PA-RISC BSD's.
- Copyright 2004 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009
+ 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,
@@ -15,123 +16,111 @@
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 . */
#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 "solib-svr4.h"
-/* Core file support. */
-
-/* Sizeof `struct reg' in . */
-#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;
-
- gdb_assert (len >= HPPABSD_SIZEOF_GREGS);
-
- for (i = HPPA_R1_REGNUM, offset = 4; i <= HPPA_R31_REGNUM; i++, offset += 4)
+ 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 (regnum == -1 || regnum == i)
- regcache_raw_supply (regcache, i, regs + offset);
+ if (target_read_memory ((faddr & ~3) + 4, buf, sizeof buf) == 0)
+ return extract_unsigned_integer (buf, sizeof buf, byte_order);
}
- 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);
-}
-
-/* OpenBSD/hppa register set. */
+ /* 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;
-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)
-{
- if (strcmp (sect_name, ".reg") == 0 && sect_size >= HPPABSD_SIZEOF_GREGS)
- return &hppabsd_gregset;
+ 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, 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;
+ }
+ }
+ }
- return NULL;
+ return 0;
}
-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. */
- set_gdbarch_in_solib_call_trampoline
- (gdbarch, generic_in_solib_call_trampoline);
+ /* OpenBSD and NetBSD use SVR4-style shared libraries. */
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
}
-
-
-/* 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;
-}
-
-
-/* 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);
-}