/* Dynamic architecture support for GDB, the GNU debugger.
- Copyright 1998-1999, Free Software Foundation, Inc.
+
+ Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
+ Free Software Foundation, Inc.
This file is part of GDB.
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. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
-#if GDB_MULTI_ARCH
+#include "arch-utils.h"
+#include "buildsym.h"
#include "gdbcmd.h"
#include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */
-#else
-/* Just include everything in sight so that the every old definition
- of macro is visible. */
#include "gdb_string.h"
-#include <ctype.h>
-#include "symtab.h"
-#include "frame.h"
-#include "inferior.h"
-#include "breakpoint.h"
-#include "gdb_wait.h"
+#include "regcache.h"
+#include "gdb_assert.h"
+#include "sim-regno.h"
#include "gdbcore.h"
-#include "gdbcmd.h"
-#include "target.h"
-#include "gdbthread.h"
-#include "annotate.h"
-#include "symfile.h" /* for overlay functions */
-#endif
+#include "osabi.h"
+#include "target-descriptions.h"
-/* Convenience macro for allocting typesafe memory. */
+#include "version.h"
-#ifndef XMALLOC
-#define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE))
-#endif
+#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)
+{
+ /* 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)
+ && DEPRECATED_USE_STRUCT_CONVENTION (0, valtype));
-/* Use the program counter to determine the contents and size
- of a breakpoint instruction. If no target-dependent macro
- BREAKPOINT_FROM_PC has been defined to implement this function,
- assume that the breakpoint doesn't depend on the PC, and
- use the values of the BIG_BREAKPOINT and LITTLE_BREAKPOINT macros.
- Return a pointer to a string of bytes that encode a breakpoint
- instruction, stores the length of the string to *lenptr,
- and optionally adjust the pc to point to the correct memory location
- for inserting the breakpoint. */
-
-unsigned char *
-legacy_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr)
-{
- /* {BIG_,LITTLE_}BREAKPOINT is the sequence of bytes we insert for a
- breakpoint. On some machines, breakpoints are handled by the
- target environment and we don't have to worry about them here. */
-#ifdef BIG_BREAKPOINT
- if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+ if (writebuf != NULL)
{
- static unsigned char big_break_insn[] = BIG_BREAKPOINT;
- *lenptr = sizeof (big_break_insn);
- return big_break_insn;
+ 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);
+ STORE_RETURN_VALUE (valtype, regcache, writebuf);
}
-#endif
-#ifdef LITTLE_BREAKPOINT
- if (TARGET_BYTE_ORDER != BIG_ENDIAN)
+
+ if (readbuf != NULL)
{
- static unsigned char little_break_insn[] = LITTLE_BREAKPOINT;
- *lenptr = sizeof (little_break_insn);
- return little_break_insn;
+ gdb_assert (!struct_return);
+ EXTRACT_RETURN_VALUE (valtype, regcache, readbuf);
}
-#endif
-#ifdef BREAKPOINT
- {
- static unsigned char break_insn[] = BREAKPOINT;
- *lenptr = sizeof (break_insn);
- return break_insn;
- }
-#endif
- *lenptr = 0;
- return NULL;
+
+ if (struct_return)
+ return RETURN_VALUE_STRUCT_CONVENTION;
+ else
+ return RETURN_VALUE_REGISTER_CONVENTION;
+}
+
+int
+legacy_register_sim_regno (int regnum)
+{
+ /* Only makes sense to supply raw registers. */
+ gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (current_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')
+ return regnum;
+ else
+ return LEGACY_SIM_REGNO_IGNORE;
+}
+
+CORE_ADDR
+generic_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
+{
+ return 0;
+}
+
+CORE_ADDR
+generic_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc)
+{
+ return 0;
}
int
-generic_frameless_function_invocation_not (struct frame_info *fi)
+generic_in_solib_return_trampoline (CORE_ADDR pc, char *name)
{
return 0;
}
int
-generic_return_value_on_stack_not (struct type *type)
+generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
{
return 0;
}
-char *
-legacy_register_name (int i)
+/* Helper functions for gdbarch_inner_than */
+
+int
+core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs)
{
-#ifdef REGISTER_NAMES
- static char *names[] = REGISTER_NAMES;
- if (i < 0 || i >= (sizeof (names) / sizeof (*names)))
- return NULL;
- else
- return names[i];
-#else
- internal_error ("legacy_register_name: called.");
- return NULL;
-#endif
+ return (lhs < rhs);
}
-#if defined (CALL_DUMMY)
-LONGEST legacy_call_dummy_words[] = CALL_DUMMY;
-#else
-LONGEST legacy_call_dummy_words[1];
-#endif
-int legacy_sizeof_call_dummy_words = sizeof (legacy_call_dummy_words);
+int
+core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs)
+{
+ return (lhs > rhs);
+}
+
+/* Misc helper functions for targets. */
+
+CORE_ADDR
+core_addr_identity (CORE_ADDR addr)
+{
+ return addr;
+}
+
+CORE_ADDR
+convert_from_func_ptr_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr,
+ struct target_ops *targ)
+{
+ return addr;
+}
+
+int
+no_op_reg_to_regnum (int reg)
+{
+ return reg;
+}
void
-generic_remote_translate_xfer_address (CORE_ADDR gdb_addr, int gdb_len,
- CORE_ADDR * rem_addr, int *rem_len)
+default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym)
{
- *rem_addr = gdb_addr;
- *rem_len = gdb_len;
+ return;
+}
+
+void
+default_coff_make_msymbol_special (int val, struct minimal_symbol *msym)
+{
+ return;
}
int
-generic_prologue_frameless_p (CORE_ADDR ip)
+cannot_register_not (int regnum)
{
-#ifdef SKIP_PROLOGUE_FRAMELESS_P
- return ip == SKIP_PROLOGUE_FRAMELESS_P (ip);
-#else
- return ip == SKIP_PROLOGUE (ip);
-#endif
+ 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
+ raw. */
-/* Helper functions for INNER_THAN */
+void
+legacy_virtual_frame_pointer (CORE_ADDR pc,
+ int *frame_regnum,
+ LONGEST *frame_offset)
+{
+ /* FIXME: cagney/2002-09-13: This code is used when identifying the
+ frame pointer of the current PC. It is assuming that a single
+ 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);
+ else
+ /* Should this be an internal error? I guess so, it is reflecting
+ an architectural limitation in the current design. */
+ internal_error (__FILE__, __LINE__, _("No virtual frame pointer available"));
+ *frame_offset = 0;
+}
+\f
int
-core_addr_lessthan (lhs, rhs)
- CORE_ADDR lhs;
- CORE_ADDR rhs;
+generic_convert_register_p (int regnum, struct type *type)
{
- return (lhs < rhs);
+ return 0;
}
int
-core_addr_greaterthan (lhs, rhs)
- CORE_ADDR lhs;
- CORE_ADDR rhs;
+default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type)
{
- return (lhs > rhs);
+ return 0;
+}
+
+int
+generic_instruction_nullified (struct gdbarch *gdbarch,
+ struct regcache *regcache)
+{
+ return 0;
+}
+
+int
+default_remote_register_number (struct gdbarch *gdbarch,
+ int regno)
+{
+ return regno;
+}
+
+\f
+/* Functions to manipulate the endianness of the target. */
+
+static int target_byte_order_user = BFD_ENDIAN_UNKNOWN;
+
+static const char endian_big[] = "big";
+static const char endian_little[] = "little";
+static const char endian_auto[] = "auto";
+static const char *endian_enum[] =
+{
+ endian_big,
+ endian_little,
+ endian_auto,
+ NULL,
+};
+static const char *set_endian_string;
+
+enum bfd_endian
+selected_byte_order (void)
+{
+ if (target_byte_order_user != BFD_ENDIAN_UNKNOWN)
+ return gdbarch_byte_order (current_gdbarch);
+ else
+ return BFD_ENDIAN_UNKNOWN;
+}
+
+/* Called by ``show endian''. */
+
+static void
+show_endian (struct ui_file *file, int from_tty, struct cmd_list_element *c,
+ const char *value)
+{
+ if (target_byte_order_user == BFD_ENDIAN_UNKNOWN)
+ if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG)
+ fprintf_unfiltered (file, _("The target endianness is set automatically "
+ "(currently big endian)\n"));
+ else
+ fprintf_unfiltered (file, _("The target endianness is set automatically "
+ "(currently little endian)\n"));
+ else
+ if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG)
+ fprintf_unfiltered (file,
+ _("The target is assumed to be big endian\n"));
+ else
+ fprintf_unfiltered (file,
+ _("The target is assumed to be little endian\n"));
+}
+
+static void
+set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c)
+{
+ struct gdbarch_info info;
+
+ gdbarch_info_init (&info);
+
+ if (set_endian_string == endian_auto)
+ {
+ target_byte_order_user = BFD_ENDIAN_UNKNOWN;
+ if (! gdbarch_update_p (info))
+ internal_error (__FILE__, __LINE__,
+ _("set_endian: architecture update failed"));
+ }
+ else if (set_endian_string == endian_little)
+ {
+ info.byte_order = BFD_ENDIAN_LITTLE;
+ if (! gdbarch_update_p (info))
+ printf_unfiltered (_("Little endian target not supported by GDB\n"));
+ else
+ target_byte_order_user = BFD_ENDIAN_LITTLE;
+ }
+ else if (set_endian_string == endian_big)
+ {
+ info.byte_order = BFD_ENDIAN_BIG;
+ if (! gdbarch_update_p (info))
+ printf_unfiltered (_("Big endian target not supported by GDB\n"));
+ else
+ target_byte_order_user = BFD_ENDIAN_BIG;
+ }
+ else
+ internal_error (__FILE__, __LINE__,
+ _("set_endian: bad value"));
+
+ show_endian (gdb_stdout, from_tty, NULL, NULL);
+}
+
+/* Given SELECTED, a currently selected BFD architecture, and
+ FROM_TARGET, a BFD architecture reported by the target description,
+ return what architecture to use. Either may be NULL; if both are
+ specified, we use the more specific. If the two are obviously
+ incompatible, warn the user. */
+
+static const struct bfd_arch_info *
+choose_architecture_for_target (const struct bfd_arch_info *selected,
+ const struct bfd_arch_info *from_target)
+{
+ const struct bfd_arch_info *compat1, *compat2;
+
+ if (selected == NULL)
+ return from_target;
+
+ if (from_target == NULL)
+ return selected;
+
+ /* struct bfd_arch_info objects are singletons: that is, there's
+ supposed to be exactly one instance for a given machine. So you
+ can tell whether two are equivalent by comparing pointers. */
+ if (from_target == selected)
+ return selected;
+
+ /* BFD's 'A->compatible (A, B)' functions return zero if A and B are
+ incompatible. But if they are compatible, it returns the 'more
+ featureful' of the two arches. That is, if A can run code
+ written for B, but B can't run code written for A, then it'll
+ return A.
+
+ Some targets (e.g. MIPS as of 2006-12-04) don't fully
+ implement this, instead always returning NULL or the first
+ argument. We detect that case by checking both directions. */
+
+ compat1 = selected->compatible (selected, from_target);
+ compat2 = from_target->compatible (from_target, selected);
+
+ if (compat1 == NULL && compat2 == NULL)
+ {
+ warning (_("Selected architecture %s is not compatible "
+ "with reported target architecture %s"),
+ selected->printable_name, from_target->printable_name);
+ return selected;
+ }
+
+ if (compat1 == NULL)
+ return compat2;
+ if (compat2 == NULL)
+ return compat1;
+ if (compat1 == compat2)
+ return compat1;
+
+ /* If the two didn't match, but one of them was a default architecture,
+ assume the more specific one is correct. This handles the case
+ where an executable or target description just says "mips", but
+ the other knows which MIPS variant. */
+ if (compat1->the_default)
+ return compat2;
+ if (compat2->the_default)
+ return compat1;
+
+ /* We have no idea which one is better. This is a bug, but not
+ a critical problem; warn the user. */
+ warning (_("Selected architecture %s is ambiguous with "
+ "reported target architecture %s"),
+ selected->printable_name, from_target->printable_name);
+ return selected;
+}
+
+/* Functions to manipulate the architecture of the target */
+
+enum set_arch { set_arch_auto, set_arch_manual };
+
+static const struct bfd_arch_info *target_architecture_user;
+
+static const char *set_architecture_string;
+
+const char *
+selected_architecture_name (void)
+{
+ if (target_architecture_user == NULL)
+ return NULL;
+ else
+ return set_architecture_string;
+}
+
+/* Called if the user enters ``show architecture'' without an
+ argument. */
+
+static void
+show_architecture (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ const char *arch;
+ arch = gdbarch_bfd_arch_info (current_gdbarch)->printable_name;
+ if (target_architecture_user == NULL)
+ fprintf_filtered (file, _("\
+The target architecture is set automatically (currently %s)\n"), arch);
+ else
+ fprintf_filtered (file, _("\
+The target architecture is assumed to be %s\n"), arch);
+}
+
+
+/* Called if the user enters ``set architecture'' with or without an
+ argument. */
+
+static void
+set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c)
+{
+ struct gdbarch_info info;
+
+ gdbarch_info_init (&info);
+
+ if (strcmp (set_architecture_string, "auto") == 0)
+ {
+ target_architecture_user = NULL;
+ if (!gdbarch_update_p (info))
+ internal_error (__FILE__, __LINE__,
+ _("could not select an architecture automatically"));
+ }
+ else
+ {
+ info.bfd_arch_info = bfd_scan_arch (set_architecture_string);
+ if (info.bfd_arch_info == NULL)
+ internal_error (__FILE__, __LINE__,
+ _("set_architecture: bfd_scan_arch failed"));
+ if (gdbarch_update_p (info))
+ target_architecture_user = info.bfd_arch_info;
+ else
+ printf_unfiltered (_("Architecture `%s' not recognized.\n"),
+ set_architecture_string);
+ }
+ show_architecture (gdb_stdout, from_tty, NULL, NULL);
}
+/* Try to select a global architecture that matches "info". Return
+ non-zero if the attempt succeds. */
+int
+gdbarch_update_p (struct gdbarch_info info)
+{
+ struct gdbarch *new_gdbarch = gdbarch_find_by_info (info);
+
+ /* If there no architecture by that name, reject the request. */
+ if (new_gdbarch == NULL)
+ {
+ if (gdbarch_debug)
+ fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: "
+ "Architecture not found\n");
+ return 0;
+ }
+
+ /* If it is the same old architecture, accept the request (but don't
+ swap anything). */
+ if (new_gdbarch == current_gdbarch)
+ {
+ if (gdbarch_debug)
+ fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: "
+ "Architecture 0x%08lx (%s) unchanged\n",
+ (long) 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,
+ gdbarch_bfd_arch_info (new_gdbarch)->printable_name);
+ deprecated_current_gdbarch_select_hack (new_gdbarch);
+
+ return 1;
+}
+
+/* Return the architecture for ABFD. If no suitable architecture
+ could be find, return NULL. */
+
+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);
+}
+
+/* Set the dynamic target-system-dependent parameters (architecture,
+ byte-order) using information found in the BFD */
+
+void
+set_gdbarch_from_file (bfd *abfd)
+{
+ struct gdbarch *gdbarch;
+
+ gdbarch = gdbarch_from_bfd (abfd);
+ if (gdbarch == NULL)
+ error (_("Architecture of file not recognized."));
+ deprecated_current_gdbarch_select_hack (gdbarch);
+}
+
+/* Initialize the current architecture. Update the ``set
+ architecture'' command so that it specifies a list of valid
+ architectures. */
+
+#ifdef DEFAULT_BFD_ARCH
+extern const bfd_arch_info_type DEFAULT_BFD_ARCH;
+static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH;
+#else
+static const bfd_arch_info_type *default_bfd_arch;
+#endif
+
+#ifdef DEFAULT_BFD_VEC
+extern const bfd_target DEFAULT_BFD_VEC;
+static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC;
+#else
+static const bfd_target *default_bfd_vec;
+#endif
+
+static int default_byte_order = BFD_ENDIAN_UNKNOWN;
+
+void
+initialize_current_architecture (void)
+{
+ const char **arches = gdbarch_printable_names ();
+
+ /* determine a default architecture and byte order. */
+ struct gdbarch_info info;
+ gdbarch_info_init (&info);
+
+ /* Find a default architecture. */
+ if (default_bfd_arch == NULL)
+ {
+ /* Choose the architecture by taking the first one
+ alphabetically. */
+ const char *chosen = arches[0];
+ const char **arch;
+ for (arch = arches; *arch != NULL; arch++)
+ {
+ if (strcmp (*arch, chosen) < 0)
+ chosen = *arch;
+ }
+ if (chosen == NULL)
+ internal_error (__FILE__, __LINE__,
+ _("initialize_current_architecture: No arch"));
+ default_bfd_arch = bfd_scan_arch (chosen);
+ if (default_bfd_arch == NULL)
+ internal_error (__FILE__, __LINE__,
+ _("initialize_current_architecture: Arch not found"));
+ }
+
+ info.bfd_arch_info = default_bfd_arch;
+
+ /* Take several guesses at a byte order. */
+ if (default_byte_order == BFD_ENDIAN_UNKNOWN
+ && default_bfd_vec != NULL)
+ {
+ /* Extract BFD's default vector's byte order. */
+ switch (default_bfd_vec->byteorder)
+ {
+ case BFD_ENDIAN_BIG:
+ default_byte_order = BFD_ENDIAN_BIG;
+ break;
+ case BFD_ENDIAN_LITTLE:
+ default_byte_order = BFD_ENDIAN_LITTLE;
+ break;
+ default:
+ break;
+ }
+ }
+ if (default_byte_order == BFD_ENDIAN_UNKNOWN)
+ {
+ /* look for ``*el-*'' in the target name. */
+ const char *chp;
+ chp = strchr (target_name, '-');
+ if (chp != NULL
+ && chp - 2 >= target_name
+ && strncmp (chp - 2, "el", 2) == 0)
+ default_byte_order = BFD_ENDIAN_LITTLE;
+ }
+ if (default_byte_order == BFD_ENDIAN_UNKNOWN)
+ {
+ /* Wire it to big-endian!!! */
+ default_byte_order = BFD_ENDIAN_BIG;
+ }
+
+ info.byte_order = default_byte_order;
+
+ if (! gdbarch_update_p (info))
+ internal_error (__FILE__, __LINE__,
+ _("initialize_current_architecture: Selection of "
+ "initial architecture failed"));
+
+ /* Create the ``set architecture'' command appending ``auto'' to the
+ list of architectures. */
+ {
+ struct cmd_list_element *c;
+ /* Append ``auto''. */
+ int nr;
+ for (nr = 0; arches[nr] != NULL; nr++);
+ arches = xrealloc (arches, sizeof (char*) * (nr + 2));
+ arches[nr + 0] = "auto";
+ arches[nr + 1] = NULL;
+ add_setshow_enum_cmd ("architecture", class_support,
+ arches, &set_architecture_string, _("\
+Set architecture of target."), _("\
+Show architecture of target."), NULL,
+ set_architecture, show_architecture,
+ &setlist, &showlist);
+ add_alias_cmd ("processor", "architecture", class_support, 1, &setlist);
+ }
+}
+
+
+/* Initialize a gdbarch info to values that will be automatically
+ overridden. Note: Originally, this ``struct info'' was initialized
+ using memset(0). Unfortunately, that ran into problems, namely
+ BFD_ENDIAN_BIG is zero. An explicit initialization function that
+ can explicitly set each field to a well defined value is used. */
+
+void
+gdbarch_info_init (struct gdbarch_info *info)
+{
+ memset (info, 0, sizeof (struct gdbarch_info));
+ info->byte_order = BFD_ENDIAN_UNKNOWN;
+ info->osabi = GDB_OSABI_UNINITIALIZED;
+}
+
+/* Similar to init, but this time fill in the blanks. Information is
+ obtained from the global "set ..." options and explicitly
+ initialized INFO fields. */
+
+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)
+ info->bfd_arch_info = target_architecture_user;
+ /* From the file. */
+ if (info->bfd_arch_info == NULL
+ && info->abfd != NULL
+ && bfd_get_arch (info->abfd) != bfd_arch_unknown
+ && bfd_get_arch (info->abfd) != bfd_arch_obscure)
+ info->bfd_arch_info = bfd_get_arch_info (info->abfd);
+ /* From the target. */
+ if (info->target_desc != NULL)
+ info->bfd_arch_info = choose_architecture_for_target
+ (info->bfd_arch_info, tdesc_architecture (info->target_desc));
+ /* From the default. */
+ if (info->bfd_arch_info == NULL)
+ info->bfd_arch_info = default_bfd_arch;
+
+ /* "(gdb) set byte-order ...". */
+ if (info->byte_order == BFD_ENDIAN_UNKNOWN
+ && target_byte_order_user != BFD_ENDIAN_UNKNOWN)
+ info->byte_order = target_byte_order_user;
+ /* From the INFO struct. */
+ if (info->byte_order == BFD_ENDIAN_UNKNOWN
+ && info->abfd != NULL)
+ info->byte_order = (bfd_big_endian (info->abfd) ? BFD_ENDIAN_BIG
+ : bfd_little_endian (info->abfd) ? BFD_ENDIAN_LITTLE
+ : BFD_ENDIAN_UNKNOWN);
+ /* From the default. */
+ if (info->byte_order == BFD_ENDIAN_UNKNOWN)
+ info->byte_order = default_byte_order;
+
+ /* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */
+ if (info->osabi == GDB_OSABI_UNINITIALIZED)
+ info->osabi = gdbarch_lookup_osabi (info->abfd);
+
+ /* Must have at least filled in the architecture. */
+ gdb_assert (info->bfd_arch_info != NULL);
+}
/* */
-extern initialize_file_ftype __initialize_gdbarch_utils;
+extern initialize_file_ftype _initialize_gdbarch_utils; /* -Wmissing-prototypes */
void
-__initialize_gdbarch_utils (void)
+_initialize_gdbarch_utils (void)
{
+ struct cmd_list_element *c;
+ add_setshow_enum_cmd ("endian", class_support,
+ endian_enum, &set_endian_string, _("\
+Set endianness of target."), _("\
+Show endianness of target."), NULL,
+ set_endian, show_endian,
+ &setlist, &showlist);
}
projects / deliverable / binutils-gdb.git / blobdiff