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-rw-r--r--gdb/gdbarch.c341
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diff --git a/gdb/gdbarch.c b/gdb/gdbarch.c
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+/* Semi-dynamic architecture support for GDB, the GNU debugger.
+ Copyright 1998, 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
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+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. */
+
+#include "defs.h"
+#include "bfd.h"
+#include "gdbcmd.h"
+
+
+/* Functions to manipulate the endianness of the target. */
+
+#ifdef TARGET_BYTE_ORDER_SELECTABLE
+/* compat - Catch old targets that expect a selectable byte-order to
+ default to BIG_ENDIAN */
+#ifndef TARGET_BYTE_ORDER_DEFAULT
+#define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
+#endif
+#endif
+#ifndef TARGET_BYTE_ORDER_DEFAULT
+/* compat - Catch old non byte-order selectable targets that do not
+ define TARGET_BYTE_ORDER_DEFAULT and instead expect
+ TARGET_BYTE_ORDER to be used as the default. For targets that
+ defined neither TARGET_BYTE_ORDER nor TARGET_BYTE_ORDER_DEFAULT the
+ below will get a strange compiler warning. */
+#define TARGET_BYTE_ORDER_DEFAULT TARGET_BYTE_ORDER
+#endif
+int target_byte_order = TARGET_BYTE_ORDER_DEFAULT;
+int target_byte_order_auto = 1;
+
+/* Chain containing the \"set endian\" commands. */
+static struct cmd_list_element *endianlist = NULL;
+
+/* Called by ``show endian''. */
+static void show_endian PARAMS ((char *, int));
+static void
+show_endian (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ char *msg =
+ (TARGET_BYTE_ORDER_AUTO
+ ? "The target endianness is set automatically (currently %s endian)\n"
+ : "The target is assumed to be %s endian\n");
+ printf_unfiltered (msg, (TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"));
+}
+
+/* Called if the user enters ``set endian'' without an argument. */
+static void set_endian PARAMS ((char *, int));
+static void
+set_endian (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
+ show_endian (args, from_tty);
+}
+
+/* Called by ``set endian big''. */
+static void set_endian_big PARAMS ((char *, int));
+static void
+set_endian_big (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ if (TARGET_BYTE_ORDER_SELECTABLE_P)
+ {
+ target_byte_order = BIG_ENDIAN;
+ target_byte_order_auto = 0;
+ }
+ else
+ {
+ printf_unfiltered ("Byte order is not selectable.");
+ show_endian (args, from_tty);
+ }
+}
+
+/* Called by ``set endian little''. */
+static void set_endian_little PARAMS ((char *, int));
+static void
+set_endian_little (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ if (TARGET_BYTE_ORDER_SELECTABLE_P)
+ {
+ target_byte_order = LITTLE_ENDIAN;
+ target_byte_order_auto = 0;
+ }
+ else
+ {
+ printf_unfiltered ("Byte order is not selectable.");
+ show_endian (args, from_tty);
+ }
+}
+
+/* Called by ``set endian auto''. */
+static void set_endian_auto PARAMS ((char *, int));
+static void
+set_endian_auto (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ if (TARGET_BYTE_ORDER_SELECTABLE_P)
+ {
+ target_byte_order_auto = 1;
+ }
+ else
+ {
+ printf_unfiltered ("Byte order is not selectable.");
+ show_endian (args, from_tty);
+ }
+}
+
+/* Set the endianness from a BFD. */
+static void set_endian_from_file PARAMS ((bfd *));
+static void
+set_endian_from_file (abfd)
+ bfd *abfd;
+{
+ if (TARGET_BYTE_ORDER_SELECTABLE_P)
+ {
+ int want;
+
+ if (bfd_big_endian (abfd))
+ want = BIG_ENDIAN;
+ else
+ want = LITTLE_ENDIAN;
+ if (TARGET_BYTE_ORDER_AUTO)
+ target_byte_order = want;
+ else if (TARGET_BYTE_ORDER != want)
+ warning ("%s endian file does not match %s endian target.",
+ want == BIG_ENDIAN ? "big" : "little",
+ TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little");
+ }
+ else
+ {
+ if (bfd_big_endian (abfd)
+ ? TARGET_BYTE_ORDER != BIG_ENDIAN
+ : TARGET_BYTE_ORDER == BIG_ENDIAN)
+ warning ("%s endian file does not match %s endian target.",
+ bfd_big_endian (abfd) ? "big" : "little",
+ TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little");
+ }
+}
+
+
+
+/* Functions to manipulate the architecture of the target */
+
+int target_architecture_auto = 1;
+extern const bfd_arch_info_type bfd_default_arch_struct;
+const bfd_arch_info_type *target_architecture = &bfd_default_arch_struct;
+int (*target_architecture_hook) PARAMS ((const bfd_arch_info_type *ap));
+
+/* Do the real work of changing the current architecture */
+static void
+set_arch (arch)
+ const bfd_arch_info_type *arch;
+{
+ /* FIXME: Is it compatible with gdb? */
+ /* Check with the target on the setting */
+ if (target_architecture_hook != NULL
+ && !target_architecture_hook (arch))
+ printf_unfiltered ("Target does not support `%s' architecture.\n",
+ arch->printable_name);
+ else
+ {
+ target_architecture_auto = 0;
+ target_architecture = arch;
+ }
+}
+
+/* Called if the user enters ``show architecture'' without an argument. */
+static void show_architecture PARAMS ((char *, int));
+static void
+show_architecture (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ const char *arch;
+ arch = target_architecture->printable_name;
+ if (target_architecture_auto)
+ printf_filtered ("The target architecture is set automatically (currently %s)\n", arch);
+ else
+ printf_filtered ("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 PARAMS ((char *, int));
+static void
+set_architecture (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ if (args == NULL)
+ {
+ printf_unfiltered ("\"set architecture\" must be followed by \"auto\" or an architecture name.\n");
+ }
+ else if (strcmp (args, "auto") == 0)
+ {
+ target_architecture_auto = 1;
+ }
+ else
+ {
+ const bfd_arch_info_type *arch = bfd_scan_arch (args);
+ if (arch != NULL)
+ set_arch (arch);
+ else
+ printf_unfiltered ("Architecture `%s' not reconized.\n", args);
+ }
+}
+
+/* Called if the user enters ``info architecture'' without an argument. */
+static void info_architecture PARAMS ((char *, int));
+static void
+info_architecture (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ enum bfd_architecture a;
+ printf_filtered ("Available architectures are:\n");
+ for (a = bfd_arch_obscure + 1; a < bfd_arch_last; a++)
+ {
+ const bfd_arch_info_type *ap = bfd_lookup_arch (a, 0);
+ if (ap != NULL)
+ {
+ do
+ {
+ printf_filtered (" %s", ap->printable_name);
+ ap = ap->next;
+ }
+ while (ap != NULL);
+ printf_filtered ("\n");
+ }
+ }
+}
+
+/* Set the architecture from arch/machine */
+void
+set_architecture_from_arch_mach (arch, mach)
+ enum bfd_architecture arch;
+ unsigned long mach;
+{
+ const bfd_arch_info_type *wanted = bfd_lookup_arch (arch, mach);
+ if (wanted != NULL)
+ set_arch (wanted);
+ else
+ fatal ("hardwired architecture/machine not reconized");
+}
+
+/* Set the architecture from a BFD */
+static void set_architecture_from_file PARAMS ((bfd *));
+static void
+set_architecture_from_file (abfd)
+ bfd *abfd;
+{
+ const bfd_arch_info_type *wanted = bfd_get_arch_info (abfd);
+ if (target_architecture_auto)
+ {
+ if (target_architecture_hook != NULL
+ && !target_architecture_hook (wanted))
+ warning ("Target may not support %s architecture",
+ wanted->printable_name);
+ target_architecture = wanted;
+ }
+ else if (wanted != target_architecture)
+ {
+ warning ("%s architecture file may be incompatible with %s target.",
+ wanted->printable_name,
+ target_architecture->printable_name);
+ }
+}
+
+
+
+/* Disassembler */
+
+/* Pointer to the target-dependent disassembly function. */
+int (*tm_print_insn) PARAMS ((bfd_vma, disassemble_info *));
+disassemble_info tm_print_insn_info;
+
+
+
+/* Set the dynamic target-system-dependant parameters (architecture,
+ byte-order) using information found in the BFD */
+
+void
+set_gdbarch_from_file (abfd)
+ bfd *abfd;
+{
+ set_architecture_from_file (abfd);
+ set_endian_from_file (abfd);
+}
+
+
+extern void _initialize_gdbarch PARAMS ((void));
+void
+_initialize_gdbarch ()
+{
+ add_prefix_cmd ("endian", class_support, set_endian,
+ "Set endianness of target.",
+ &endianlist, "set endian ", 0, &setlist);
+ add_cmd ("big", class_support, set_endian_big,
+ "Set target as being big endian.", &endianlist);
+ add_cmd ("little", class_support, set_endian_little,
+ "Set target as being little endian.", &endianlist);
+ add_cmd ("auto", class_support, set_endian_auto,
+ "Select target endianness automatically.", &endianlist);
+ add_cmd ("endian", class_support, show_endian,
+ "Show endianness of target.", &showlist);
+
+ add_cmd ("architecture", class_support, set_architecture,
+ "Set architecture of target.", &setlist);
+ add_alias_cmd ("processor", "architecture", class_support, 1, &setlist);
+ add_cmd ("architecture", class_support, show_architecture,
+ "Show architecture of target.", &showlist);
+ add_cmd ("architecture", class_support, info_architecture,
+ "List supported target architectures", &infolist);
+
+ INIT_DISASSEMBLE_INFO_NO_ARCH (tm_print_insn_info, gdb_stdout, (fprintf_ftype)fprintf_filtered);
+ tm_print_insn_info.flavour = bfd_target_unknown_flavour;
+ tm_print_insn_info.read_memory_func = dis_asm_read_memory;
+ tm_print_insn_info.memory_error_func = dis_asm_memory_error;
+ tm_print_insn_info.print_address_func = dis_asm_print_address;
+}