/* Dynamic architecture support for GDB, the GNU debugger.
- Copyright 1998-1999, Free Software Foundation, Inc.
+
+ Copyright 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation,
+ Inc.
This file is part of GDB.
#include "defs.h"
#if GDB_MULTI_ARCH
+#include "arch-utils.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 "gdbcore.h"
#include "gdbcmd.h"
#include "target.h"
-#include "gdbthread.h"
#include "annotate.h"
-#include "symfile.h" /* for overlay functions */
#endif
+#include "gdb_string.h"
+#include "regcache.h"
+#include "gdb_assert.h"
+#include "sim-regno.h"
-/* Convenience macro for allocting typesafe memory. */
+#include "version.h"
-#ifndef XMALLOC
-#define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE))
-#endif
+#include "floatformat.h"
+/* Implementation of extract return value that grubs around in the
+ register cache. */
+void
+legacy_extract_return_value (struct type *type, struct regcache *regcache,
+ void *valbuf)
+{
+ char *registers = deprecated_grub_regcache_for_registers (regcache);
+ bfd_byte *buf = valbuf;
+ DEPRECATED_EXTRACT_RETURN_VALUE (type, registers, buf); /* OK */
+}
-/* 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. */
+/* Implementation of store return value that grubs the register cache.
+ Takes a local copy of the buffer to avoid const problems. */
+void
+legacy_store_return_value (struct type *type, struct regcache *regcache,
+ const void *buf)
+{
+ bfd_byte *b = alloca (TYPE_LENGTH (type));
+ gdb_assert (regcache == current_regcache);
+ memcpy (b, buf, TYPE_LENGTH (type));
+ DEPRECATED_STORE_RETURN_VALUE (type, b);
+}
-unsigned char *
-legacy_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr)
+
+int
+legacy_register_sim_regno (int regnum)
{
- /* {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)
- {
- static unsigned char big_break_insn[] = BIG_BREAKPOINT;
- *lenptr = sizeof (big_break_insn);
- return big_break_insn;
- }
-#endif
-#ifdef LITTLE_BREAKPOINT
- if (TARGET_BYTE_ORDER != BIG_ENDIAN)
- {
- static unsigned char little_break_insn[] = LITTLE_BREAKPOINT;
- *lenptr = sizeof (little_break_insn);
- return little_break_insn;
- }
-#endif
-#ifdef BREAKPOINT
- {
- static unsigned char break_insn[] = BREAKPOINT;
- *lenptr = sizeof (break_insn);
- return break_insn;
- }
-#endif
- *lenptr = 0;
- return NULL;
+ /* Only makes sense to supply raw registers. */
+ gdb_assert (regnum >= 0 && regnum < NUM_REGS);
+ /* 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 (REGISTER_NAME (regnum) != NULL
+ && REGISTER_NAME (regnum)[0] != '\0')
+ return regnum;
+ else
+ return LEGACY_SIM_REGNO_IGNORE;
}
int
return 0;
}
-char *
+int
+generic_return_value_on_stack_not (struct type *type)
+{
+ return 0;
+}
+
+CORE_ADDR
+generic_skip_trampoline_code (CORE_ADDR pc)
+{
+ return 0;
+}
+
+int
+generic_in_solib_call_trampoline (CORE_ADDR pc, char *name)
+{
+ return 0;
+}
+
+int
+generic_in_solib_return_trampoline (CORE_ADDR pc, char *name)
+{
+ return 0;
+}
+
+int
+generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
+{
+ return 0;
+}
+
+const char *
legacy_register_name (int i)
{
#ifdef REGISTER_NAMES
else
return names[i];
#else
- internal_error ("legacy_register_name: called.");
+ internal_error (__FILE__, __LINE__,
+ "legacy_register_name: called.");
return NULL;
#endif
}
int legacy_sizeof_call_dummy_words = sizeof (legacy_call_dummy_words);
void
-generic_remote_translate_xfer_address (CORE_ADDR gdb_addr, int gdb_len,
+generic_remote_translate_xfer_address (struct gdbarch *gdbarch,
+ struct regcache *regcache,
+ CORE_ADDR gdb_addr, int gdb_len,
CORE_ADDR * rem_addr, int *rem_len)
{
*rem_addr = gdb_addr;
*rem_len = gdb_len;
}
+int
+generic_prologue_frameless_p (CORE_ADDR ip)
+{
+ return ip == SKIP_PROLOGUE (ip);
+}
+
+/* New/multi-arched targets should use the correct gdbarch field
+ instead of using this global pointer. */
+int
+legacy_print_insn (bfd_vma vma, disassemble_info *info)
+{
+ return (*deprecated_tm_print_insn) (vma, info);
+}
+
+/* Helper functions for INNER_THAN */
+
+int
+core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs)
+{
+ return (lhs < rhs);
+}
+
+int
+core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs)
+{
+ return (lhs > rhs);
+}
+
+
+/* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */
+
+const struct floatformat *
+default_float_format (struct gdbarch *gdbarch)
+{
+#if GDB_MULTI_ARCH
+ int byte_order = gdbarch_byte_order (gdbarch);
+#else
+ int byte_order = TARGET_BYTE_ORDER;
+#endif
+ switch (byte_order)
+ {
+ case BFD_ENDIAN_BIG:
+ return &floatformat_ieee_single_big;
+ case BFD_ENDIAN_LITTLE:
+ return &floatformat_ieee_single_little;
+ default:
+ internal_error (__FILE__, __LINE__,
+ "default_float_format: bad byte order");
+ }
+}
+
+
+const struct floatformat *
+default_double_format (struct gdbarch *gdbarch)
+{
+#if GDB_MULTI_ARCH
+ int byte_order = gdbarch_byte_order (gdbarch);
+#else
+ int byte_order = TARGET_BYTE_ORDER;
+#endif
+ switch (byte_order)
+ {
+ case BFD_ENDIAN_BIG:
+ return &floatformat_ieee_double_big;
+ case BFD_ENDIAN_LITTLE:
+ return &floatformat_ieee_double_little;
+ default:
+ internal_error (__FILE__, __LINE__,
+ "default_double_format: bad byte order");
+ }
+}
+
+/* Misc helper functions for targets. */
+
+int
+generic_register_convertible_not (int num)
+{
+ return 0;
+}
+
+
+/* Under some ABI's that specify the `struct convention' for returning
+ structures by value, by the time we've returned from the function,
+ the return value is sitting there in the caller's buffer, but GDB
+ has no way to find the address of that buffer.
+
+ On such architectures, use this function as your
+ extract_struct_value_address method. When asked to a struct
+ returned by value in this fashion, GDB will print a nice error
+ message, instead of garbage. */
+CORE_ADDR
+generic_cannot_extract_struct_value_address (char *dummy)
+{
+ return 0;
+}
+
+CORE_ADDR
+core_addr_identity (CORE_ADDR addr)
+{
+ return addr;
+}
+
+int
+no_op_reg_to_regnum (int reg)
+{
+ return reg;
+}
+
+/* Default prepare_to_procced(). */
+int
+default_prepare_to_proceed (int select_it)
+{
+ return 0;
+}
+
+/* Generic prepare_to_proceed(). This one should be suitable for most
+ targets that support threads. */
+int
+generic_prepare_to_proceed (int select_it)
+{
+ ptid_t wait_ptid;
+ struct target_waitstatus wait_status;
+
+ /* Get the last target status returned by target_wait(). */
+ get_last_target_status (&wait_ptid, &wait_status);
+
+ /* Make sure we were stopped either at a breakpoint, or because
+ of a Ctrl-C. */
+ if (wait_status.kind != TARGET_WAITKIND_STOPPED
+ || (wait_status.value.sig != TARGET_SIGNAL_TRAP &&
+ wait_status.value.sig != TARGET_SIGNAL_INT))
+ {
+ return 0;
+ }
+
+ if (!ptid_equal (wait_ptid, minus_one_ptid)
+ && !ptid_equal (inferior_ptid, wait_ptid))
+ {
+ /* Switched over from WAIT_PID. */
+ CORE_ADDR wait_pc = read_pc_pid (wait_ptid);
+
+ if (wait_pc != read_pc ())
+ {
+ if (select_it)
+ {
+ /* Switch back to WAIT_PID thread. */
+ inferior_ptid = wait_ptid;
+
+ /* FIXME: This stuff came from switch_to_thread() in
+ thread.c (which should probably be a public function). */
+ flush_cached_frames ();
+ registers_changed ();
+ stop_pc = wait_pc;
+ select_frame (get_current_frame ());
+ }
+ /* We return 1 to indicate that there is a breakpoint here,
+ so we need to step over it before continuing to avoid
+ hitting it straight away. */
+ if (breakpoint_here_p (wait_pc))
+ {
+ return 1;
+ }
+ }
+ }
+ return 0;
+
+}
+
+CORE_ADDR
+init_frame_pc_noop (int fromleaf, struct frame_info *prev)
+{
+ /* Do nothing, implies return the same PC value. */
+ return get_frame_pc (prev);
+}
+
+CORE_ADDR
+init_frame_pc_default (int fromleaf, struct frame_info *prev)
+{
+ if (fromleaf && DEPRECATED_SAVED_PC_AFTER_CALL_P ())
+ return DEPRECATED_SAVED_PC_AFTER_CALL (get_next_frame (prev));
+ else if (get_next_frame (prev) != NULL)
+ return DEPRECATED_FRAME_SAVED_PC (get_next_frame (prev));
+ else
+ return read_pc ();
+}
+
+void
+default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym)
+{
+ return;
+}
+
+void
+default_coff_make_msymbol_special (int val, struct minimal_symbol *msym)
+{
+ return;
+}
+
+int
+cannot_register_not (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
+ raw. */
+
+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 < NUM_REGS)
+ *frame_regnum = DEPRECATED_FP_REGNUM;
+ else if (SP_REGNUM >= 0 && SP_REGNUM < NUM_REGS)
+ *frame_regnum = SP_REGNUM;
+ 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;
+}
+
+/* Assume the world is sane, every register's virtual and real size
+ is identical. */
+
+int
+generic_register_size (int regnum)
+{
+ gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS);
+ if (gdbarch_register_type_p (current_gdbarch))
+ return TYPE_LENGTH (gdbarch_register_type (current_gdbarch, regnum));
+ else
+ /* FIXME: cagney/2003-03-01: Once all architectures implement
+ gdbarch_register_type(), this entire function can go away. It
+ is made obsolete by register_size(). */
+ return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum)); /* OK */
+}
+
+/* Assume all registers are adjacent. */
+
+int
+generic_register_byte (int regnum)
+{
+ int byte;
+ int i;
+ gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS);
+ byte = 0;
+ for (i = 0; i < regnum; i++)
+ {
+ byte += generic_register_size (i);
+ }
+ return byte;
+}
+
+\f
+int
+legacy_pc_in_sigtramp (CORE_ADDR pc, char *name)
+{
+#if !defined (IN_SIGTRAMP)
+ if (SIGTRAMP_START_P ())
+ return (pc) >= SIGTRAMP_START (pc) && (pc) < SIGTRAMP_END (pc);
+ else
+ return name && strcmp ("_sigtramp", name) == 0;
+#else
+ return IN_SIGTRAMP (pc, name);
+#endif
+}
+
+int
+legacy_convert_register_p (int regnum)
+{
+ return REGISTER_CONVERTIBLE (regnum);
+}
+
+void
+legacy_register_to_value (int regnum, struct type *type,
+ char *from, char *to)
+{
+ REGISTER_CONVERT_TO_VIRTUAL (regnum, type, from, to);
+}
+
+void
+legacy_value_to_register (struct type *type, int regnum,
+ char *from, char *to)
+{
+ REGISTER_CONVERT_TO_RAW (type, regnum, from, to);
+}
+
+\f
+/* Functions to manipulate the endianness of the target. */
+
+/* ``target_byte_order'' is only used when non- multi-arch.
+ Multi-arch targets obtain the current byte order using the
+ TARGET_BYTE_ORDER gdbarch method.
+
+ The choice of initial value is entirely arbitrary. During startup,
+ the function initialize_current_architecture() updates this value
+ based on default byte-order information extracted from BFD. */
+int target_byte_order = BFD_ENDIAN_BIG;
+int target_byte_order_auto = 1;
+
+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;
+
+/* Called by ``show endian''. */
+
+static void
+show_endian (char *args, int from_tty)
+{
+ if (TARGET_BYTE_ORDER_AUTO)
+ printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n",
+ (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little"));
+ else
+ printf_unfiltered ("The target is assumed to be %s endian\n",
+ (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little"));
+}
+
+static void
+set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c)
+{
+ if (set_endian_string == endian_auto)
+ {
+ target_byte_order_auto = 1;
+ }
+ else if (set_endian_string == endian_little)
+ {
+ target_byte_order_auto = 0;
+ if (GDB_MULTI_ARCH)
+ {
+ struct gdbarch_info info;
+ gdbarch_info_init (&info);
+ 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 = BFD_ENDIAN_LITTLE;
+ }
+ }
+ else if (set_endian_string == endian_big)
+ {
+ target_byte_order_auto = 0;
+ if (GDB_MULTI_ARCH)
+ {
+ struct gdbarch_info info;
+ gdbarch_info_init (&info);
+ 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 = BFD_ENDIAN_BIG;
+ }
+ }
+ else
+ internal_error (__FILE__, __LINE__,
+ "set_endian: bad value");
+ show_endian (NULL, from_tty);
+}
+
+/* Set the endianness from a BFD. */
+
+static void
+set_endian_from_file (bfd *abfd)
+{
+ int want;
+ if (GDB_MULTI_ARCH)
+ internal_error (__FILE__, __LINE__,
+ "set_endian_from_file: not for multi-arch");
+ if (bfd_big_endian (abfd))
+ want = BFD_ENDIAN_BIG;
+ else
+ want = BFD_ENDIAN_LITTLE;
+ 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 == BFD_ENDIAN_BIG ? "big" : "little",
+ TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little");
+}
+
+
+/* Functions to manipulate the architecture of the target */
+
+enum set_arch { set_arch_auto, set_arch_manual };
+
+int target_architecture_auto = 1;
+
+const char *set_architecture_string;
+
+/* Old way of changing the current architecture. */
+
+extern const struct bfd_arch_info bfd_default_arch_struct;
+const struct bfd_arch_info *target_architecture = &bfd_default_arch_struct;
+int (*target_architecture_hook) (const struct bfd_arch_info *ap);
+
+static int
+arch_ok (const struct bfd_arch_info *arch)
+{
+ if (GDB_MULTI_ARCH)
+ internal_error (__FILE__, __LINE__,
+ "arch_ok: not multi-arched");
+ /* Should be performing the more basic check that the binary is
+ compatible with GDB. */
+ /* Check with the target that the architecture is valid. */
+ return (target_architecture_hook == NULL
+ || target_architecture_hook (arch));
+}
+
+static void
+set_arch (const struct bfd_arch_info *arch,
+ enum set_arch type)
+{
+ if (GDB_MULTI_ARCH)
+ internal_error (__FILE__, __LINE__,
+ "set_arch: not multi-arched");
+ switch (type)
+ {
+ case set_arch_auto:
+ if (!arch_ok (arch))
+ warning ("Target may not support %s architecture",
+ arch->printable_name);
+ target_architecture = arch;
+ break;
+ case set_arch_manual:
+ if (!arch_ok (arch))
+ {
+ printf_unfiltered ("Target does not support `%s' architecture.\n",
+ arch->printable_name);
+ }
+ else
+ {
+ target_architecture_auto = 0;
+ target_architecture = arch;
+ }
+ break;
+ }
+ if (gdbarch_debug)
+ gdbarch_dump (current_gdbarch, gdb_stdlog);
+}
+
+/* Set the architecture from arch/machine (deprecated) */
+
+void
+set_architecture_from_arch_mach (enum bfd_architecture arch,
+ unsigned long mach)
+{
+ const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach);
+ if (GDB_MULTI_ARCH)
+ internal_error (__FILE__, __LINE__,
+ "set_architecture_from_arch_mach: not multi-arched");
+ if (wanted != NULL)
+ set_arch (wanted, set_arch_manual);
+ else
+ internal_error (__FILE__, __LINE__,
+ "gdbarch: hardwired architecture/machine not recognized");
+}
+
+/* Set the architecture from a BFD (deprecated) */
+
+static void
+set_architecture_from_file (bfd *abfd)
+{
+ const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd);
+ if (GDB_MULTI_ARCH)
+ internal_error (__FILE__, __LINE__,
+ "set_architecture_from_file: not multi-arched");
+ if (target_architecture_auto)
+ {
+ set_arch (wanted, set_arch_auto);
+ }
+ else if (wanted != target_architecture)
+ {
+ warning ("%s architecture file may be incompatible with %s target.",
+ wanted->printable_name,
+ target_architecture->printable_name);
+ }
+}
+
+
+/* Called if the user enters ``show architecture'' without an
+ argument. */
+
+static void
+show_architecture (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 (char *ignore_args, int from_tty, struct cmd_list_element *c)
+{
+ if (strcmp (set_architecture_string, "auto") == 0)
+ {
+ target_architecture_auto = 1;
+ }
+ else if (GDB_MULTI_ARCH)
+ {
+ struct gdbarch_info info;
+ gdbarch_info_init (&info);
+ 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_auto = 0;
+ else
+ printf_unfiltered ("Architecture `%s' not recognized.\n",
+ set_architecture_string);
+ }
+ else
+ {
+ const struct bfd_arch_info *arch
+ = bfd_scan_arch (set_architecture_string);
+ if (arch == NULL)
+ internal_error (__FILE__, __LINE__,
+ "set_architecture: bfd_scan_arch failed");
+ set_arch (arch, set_arch_manual);
+ }
+ show_architecture (NULL, from_tty);
+}
+
+/* Set the dynamic target-system-dependent parameters (architecture,
+ byte-order) using information found in the BFD */
+
+void
+set_gdbarch_from_file (bfd *abfd)
+{
+ if (GDB_MULTI_ARCH)
+ {
+ struct gdbarch_info info;
+ gdbarch_info_init (&info);
+ info.abfd = abfd;
+ if (! gdbarch_update_p (info))
+ error ("Architecture of file not recognized.\n");
+ }
+ else
+ {
+ set_architecture_from_file (abfd);
+ set_endian_from_file (abfd);
+ }
+}
+
+/* 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
+
+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 (info.bfd_arch_info == NULL
+ && default_bfd_arch != NULL)
+ info.bfd_arch_info = default_bfd_arch;
+ if (info.bfd_arch_info == 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");
+ info.bfd_arch_info = bfd_scan_arch (chosen);
+ if (info.bfd_arch_info == NULL)
+ internal_error (__FILE__, __LINE__,
+ "initialize_current_architecture: Arch not found");
+ }
+
+ /* Take several guesses at a byte order. */
+ if (info.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:
+ info.byte_order = BFD_ENDIAN_BIG;
+ break;
+ case BFD_ENDIAN_LITTLE:
+ info.byte_order = BFD_ENDIAN_LITTLE;
+ break;
+ default:
+ break;
+ }
+ }
+ if (info.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)
+ info.byte_order = BFD_ENDIAN_LITTLE;
+ }
+ if (info.byte_order == BFD_ENDIAN_UNKNOWN)
+ {
+ /* Wire it to big-endian!!! */
+ info.byte_order = BFD_ENDIAN_BIG;
+ }
+
+ if (GDB_MULTI_ARCH)
+ {
+ if (! gdbarch_update_p (info))
+ {
+ internal_error (__FILE__, __LINE__,
+ "initialize_current_architecture: Selection of initial architecture failed");
+ }
+ }
+ else
+ {
+ /* If the multi-arch logic comes up with a byte-order (from BFD)
+ use it for the non-multi-arch case. */
+ if (info.byte_order != BFD_ENDIAN_UNKNOWN)
+ target_byte_order = info.byte_order;
+ initialize_non_multiarch ();
+ }
+
+ /* 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;
+ /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead
+ of ``const char *''. We just happen to know that the casts are
+ safe. */
+ c = add_set_enum_cmd ("architecture", class_support,
+ arches, &set_architecture_string,
+ "Set architecture of target.",
+ &setlist);
+ set_cmd_sfunc (c, set_architecture);
+ add_alias_cmd ("processor", "architecture", class_support, 1, &setlist);
+ /* Don't use set_from_show - need to print both auto/manual and
+ current setting. */
+ add_cmd ("architecture", class_support, show_architecture,
+ "Show the current target architecture", &showlist);
+ }
+}
+
+
+/* Initialize a gdbarch info to values that will be automatically
+ overridden. Note: Originally, this ``struct info'' was initialized
+ using memset(0). Unfortunatly, 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;
+}
+
/* */
-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;
+ c = add_set_enum_cmd ("endian", class_support,
+ endian_enum, &set_endian_string,
+ "Set endianness of target.",
+ &setlist);
+ set_cmd_sfunc (c, set_endian);
+ /* Don't use set_from_show - need to print both auto/manual and
+ current setting. */
+ add_cmd ("endian", class_support, show_endian,
+ "Show the current byte-order", &showlist);
}
projects / deliverable / binutils-gdb.git / blobdiff