/* Dynamic architecture support for GDB, the GNU debugger.
- Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
- Free Software Foundation, Inc.
+ Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 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,
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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdbcore.h"
#include "osabi.h"
#include "target-descriptions.h"
+#include "objfiles.h"
#include "version.h"
#include "floatformat.h"
-int
-always_use_struct_convention (int gcc_p, struct type *value_type)
-{
- return 1;
-}
-enum return_value_convention
-legacy_return_value (struct gdbarch *gdbarch, struct type *valtype,
- struct regcache *regcache, gdb_byte *readbuf,
- const gdb_byte *writebuf)
+struct displaced_step_closure *
+simple_displaced_step_copy_insn (struct gdbarch *gdbarch,
+ CORE_ADDR from, CORE_ADDR to,
+ struct regcache *regs)
{
- /* NOTE: cagney/2004-06-13: The gcc_p parameter to
- USE_STRUCT_CONVENTION isn't used. */
- int struct_return = ((TYPE_CODE (valtype) == TYPE_CODE_STRUCT
- || TYPE_CODE (valtype) == TYPE_CODE_UNION
- || TYPE_CODE (valtype) == TYPE_CODE_ARRAY)
- && gdbarch_deprecated_use_struct_convention
- (current_gdbarch, 0, valtype));
+ size_t len = gdbarch_max_insn_length (gdbarch);
+ gdb_byte *buf = xmalloc (len);
- if (writebuf != NULL)
- {
- gdb_assert (!struct_return);
- /* NOTE: cagney/2004-06-13: See stack.c:return_command. Old
- architectures don't expect store_return_value to handle small
- structures. Should not be called with such types. */
- gdb_assert (TYPE_CODE (valtype) != TYPE_CODE_STRUCT
- && TYPE_CODE (valtype) != TYPE_CODE_UNION);
- gdbarch_store_return_value (current_gdbarch, valtype, regcache, writebuf);
- }
+ read_memory (from, buf, len);
+ write_memory (to, buf, len);
- if (readbuf != NULL)
+ if (debug_displaced)
{
- gdb_assert (!struct_return);
- gdbarch_extract_return_value (current_gdbarch,
- valtype, regcache, readbuf);
+ fprintf_unfiltered (gdb_stdlog, "displaced: copy 0x%s->0x%s: ",
+ paddr_nz (from), paddr_nz (to));
+ displaced_step_dump_bytes (gdb_stdlog, buf, len);
}
- if (struct_return)
- return RETURN_VALUE_STRUCT_CONVENTION;
- else
- return RETURN_VALUE_REGISTER_CONVENTION;
+ return (struct displaced_step_closure *) buf;
+}
+
+
+void
+simple_displaced_step_free_closure (struct gdbarch *gdbarch,
+ struct displaced_step_closure *closure)
+{
+ xfree (closure);
+}
+
+
+CORE_ADDR
+displaced_step_at_entry_point (struct gdbarch *gdbarch)
+{
+ CORE_ADDR addr;
+ int bp_len;
+
+ addr = entry_point_address ();
+
+ /* Make certain that the address points at real code, and not a
+ function descriptor. */
+ addr = gdbarch_convert_from_func_ptr_addr (gdbarch, addr, ¤t_target);
+
+ /* Inferior calls also use the entry point as a breakpoint location.
+ We don't want displaced stepping to interfere with those
+ breakpoints, so leave space. */
+ gdbarch_breakpoint_from_pc (gdbarch, &addr, &bp_len);
+ addr += bp_len * 2;
+
+ return addr;
}
int
-legacy_register_sim_regno (int regnum)
+legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum)
{
/* Only makes sense to supply raw registers. */
- gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (current_gdbarch));
+ gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch));
/* NOTE: cagney/2002-05-13: The old code did it this way and it is
suspected that some GDB/SIM combinations may rely on this
behavour. The default should be one2one_register_sim_regno
(below). */
- if (gdbarch_register_name (current_gdbarch, regnum) != NULL
- && gdbarch_register_name (current_gdbarch, regnum)[0] != '\0')
+ if (gdbarch_register_name (gdbarch, regnum) != NULL
+ && gdbarch_register_name (gdbarch, regnum)[0] != '\0')
return regnum;
else
return LEGACY_SIM_REGNO_IGNORE;
/* Misc helper functions for targets. */
CORE_ADDR
-core_addr_identity (CORE_ADDR addr)
+core_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr)
{
return addr;
}
}
int
-no_op_reg_to_regnum (int reg)
+no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg)
{
return reg;
}
}
int
-cannot_register_not (int regnum)
+cannot_register_not (struct gdbarch *gdbarch, int regnum)
{
return 0;
}
/* Legacy version of target_virtual_frame_pointer(). Assumes that
- there is an DEPRECATED_FP_REGNUM and that it is the same, cooked or
+ there is an gdbarch_deprecated_fp_regnum and that it is the same, cooked or
raw. */
void
-legacy_virtual_frame_pointer (CORE_ADDR pc,
+legacy_virtual_frame_pointer (struct gdbarch *gdbarch,
+ CORE_ADDR pc,
int *frame_regnum,
LONGEST *frame_offset)
{
register and an offset can determine this. I think it should
instead generate a byte code expression as that would work better
with things like Dwarf2's CFI. */
- if (DEPRECATED_FP_REGNUM >= 0
- && DEPRECATED_FP_REGNUM < gdbarch_num_regs (current_gdbarch))
- *frame_regnum = DEPRECATED_FP_REGNUM;
- else if (gdbarch_sp_regnum (current_gdbarch) >= 0
- && gdbarch_sp_regnum (current_gdbarch)
- < gdbarch_num_regs (current_gdbarch))
- *frame_regnum = gdbarch_sp_regnum (current_gdbarch);
+ if (gdbarch_deprecated_fp_regnum (gdbarch) >= 0
+ && gdbarch_deprecated_fp_regnum (gdbarch)
+ < gdbarch_num_regs (gdbarch))
+ *frame_regnum = gdbarch_deprecated_fp_regnum (gdbarch);
+ else if (gdbarch_sp_regnum (gdbarch) >= 0
+ && gdbarch_sp_regnum (gdbarch)
+ < gdbarch_num_regs (gdbarch))
+ *frame_regnum = gdbarch_sp_regnum (gdbarch);
else
/* Should this be an internal error? I guess so, it is reflecting
an architectural limitation in the current design. */
\f
int
-generic_convert_register_p (int regnum, struct type *type)
+generic_convert_register_p (struct gdbarch *gdbarch, int regnum,
+ struct type *type)
{
return 0;
}
int
gdbarch_update_p (struct gdbarch_info info)
{
- struct gdbarch *new_gdbarch = gdbarch_find_by_info (info);
+ struct gdbarch *new_gdbarch;
+
+ /* Check for the current file. */
+ if (info.abfd == NULL)
+ info.abfd = exec_bfd;
+ if (info.abfd == NULL)
+ info.abfd = core_bfd;
+
+ /* Check for the current target description. */
+ if (info.target_desc == NULL)
+ info.target_desc = target_current_description ();
+
+ new_gdbarch = gdbarch_find_by_info (info);
/* If there no architecture by that name, reject the request. */
if (new_gdbarch == NULL)
/* If it is the same old architecture, accept the request (but don't
swap anything). */
- if (new_gdbarch == current_gdbarch)
+ if (new_gdbarch == target_gdbarch)
{
if (gdbarch_debug)
fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: "
- "Architecture 0x%08lx (%s) unchanged\n",
- (long) new_gdbarch,
+ "Architecture %s (%s) unchanged\n",
+ host_address_to_string (new_gdbarch),
gdbarch_bfd_arch_info (new_gdbarch)->printable_name);
return 1;
}
/* It's a new architecture, swap it in. */
if (gdbarch_debug)
fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: "
- "New architecture 0x%08lx (%s) selected\n",
- (long) new_gdbarch,
+ "New architecture %s (%s) selected\n",
+ host_address_to_string (new_gdbarch),
gdbarch_bfd_arch_info (new_gdbarch)->printable_name);
deprecated_current_gdbarch_select_hack (new_gdbarch);
struct gdbarch *
gdbarch_from_bfd (bfd *abfd)
{
- struct gdbarch *old_gdbarch = current_gdbarch;
- struct gdbarch *new_gdbarch;
struct gdbarch_info info;
-
- /* If we call gdbarch_find_by_info without filling in info.abfd,
- then it will use the global exec_bfd. That's fine if we don't
- have one of those either. And that's the only time we should
- reach here with a NULL ABFD argument - when we are discarding
- the executable. */
- gdb_assert (abfd != NULL || exec_bfd == NULL);
-
gdbarch_info_init (&info);
info.abfd = abfd;
return gdbarch_find_by_info (info);
void
set_gdbarch_from_file (bfd *abfd)
{
+ struct gdbarch_info info;
struct gdbarch *gdbarch;
- gdbarch = gdbarch_from_bfd (abfd);
+ gdbarch_info_init (&info);
+ info.abfd = abfd;
+ info.target_desc = target_current_description ();
+ gdbarch = gdbarch_find_by_info (info);
+
if (gdbarch == NULL)
error (_("Architecture of file not recognized."));
deprecated_current_gdbarch_select_hack (gdbarch);
}
info.byte_order = default_byte_order;
+ info.byte_order_for_code = info.byte_order;
if (! gdbarch_update_p (info))
internal_error (__FILE__, __LINE__,
{
memset (info, 0, sizeof (struct gdbarch_info));
info->byte_order = BFD_ENDIAN_UNKNOWN;
+ info->byte_order_for_code = info->byte_order;
info->osabi = GDB_OSABI_UNINITIALIZED;
}
void
gdbarch_info_fill (struct gdbarch_info *info)
{
- /* Check for the current file. */
- if (info->abfd == NULL)
- info->abfd = exec_bfd;
-
- /* Check for the current target description. */
- if (info->target_desc == NULL)
- info->target_desc = target_current_description ();
-
/* "(gdb) set architecture ...". */
if (info->bfd_arch_info == NULL
&& target_architecture_user)
/* From the default. */
if (info->byte_order == BFD_ENDIAN_UNKNOWN)
info->byte_order = default_byte_order;
+ info->byte_order_for_code = info->byte_order;
/* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */
if (info->osabi == GDB_OSABI_UNINITIALIZED)
projects / deliverable / binutils-gdb.git / blobdiff