/* Dynamic architecture support for GDB, the GNU debugger.
- Copyright 1998-1999, Free Software Foundation, Inc.
+ Copyright 1998, 1999, 2000, 2001 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 "regcache.h"
+#include "gdb_assert.h"
-#include "floatformat.h"
-
-/* Convenience macro for allocting typesafe memory. */
-
-#ifndef XMALLOC
-#define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE))
-#endif
+#include "version.h"
+#include "floatformat.h"
/* Use the program counter to determine the contents and size
of a breakpoint instruction. If no target-dependent macro
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_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
+{
+ return 0;
+}
+
char *
legacy_register_name (int i)
{
else
return names[i];
#else
- internal_error ("legacy_register_name: called.");
+ internal_error (__FILE__, __LINE__,
+ "legacy_register_name: called.");
return NULL;
#endif
}
#endif
}
+/* 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 (*tm_print_insn) (vma, info);
+}
/* Helper functions for INNER_THAN */
int
-core_addr_lessthan (lhs, rhs)
- CORE_ADDR lhs;
- CORE_ADDR rhs;
+core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs)
{
return (lhs < rhs);
}
int
-core_addr_greaterthan (lhs, rhs)
- CORE_ADDR lhs;
- CORE_ADDR rhs;
+core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs)
{
return (lhs > rhs);
}
{
case BIG_ENDIAN:
return &floatformat_ieee_single_big;
- case LITTLE_ENDIAN:
+ case BFD_ENDIAN_LITTLE:
return &floatformat_ieee_single_little;
default:
- internal_error ("default_float_format: bad byte order");
+ internal_error (__FILE__, __LINE__,
+ "default_float_format: bad byte order");
}
}
{
case BIG_ENDIAN:
return &floatformat_ieee_double_big;
- case LITTLE_ENDIAN:
+ case BFD_ENDIAN_LITTLE:
return &floatformat_ieee_double_little;
default:
- internal_error ("default_double_format: bad byte order");
+ internal_error (__FILE__, __LINE__,
+ "default_double_format: bad byte order");
}
}
/* Misc helper functions for targets. */
int
-frame_num_args_unknown (fi)
- struct frame_info *fi;
+frame_num_args_unknown (struct frame_info *fi)
{
return -1;
}
int
-generic_register_convertible_not (num)
- int num;
+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;
+}
+
+int
+default_register_sim_regno (int num)
+{
+ return num;
+}
+
+
+CORE_ADDR
+core_addr_identity (CORE_ADDR addr)
+{
+ return addr;
+}
+
+int
+no_op_reg_to_regnum (int reg)
+{
+ return reg;
+}
+
+/* For use by frame_args_address and frame_locals_address. */
+CORE_ADDR
+default_frame_address (struct frame_info *fi)
+{
+ return fi->frame;
+}
+
+/* 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 (), 0);
+ }
+ /* 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;
+
+}
+
+void
+init_frame_pc_noop (int fromleaf, struct frame_info *prev)
+{
+ return;
+}
+
+void
+init_frame_pc_default (int fromleaf, struct frame_info *prev)
+{
+ if (fromleaf)
+ prev->pc = SAVED_PC_AFTER_CALL (prev->next);
+ else if (prev->next != NULL)
+ prev->pc = FRAME_SAVED_PC (prev->next);
+ else
+ prev->pc = read_pc ();
+}
+
+int
+cannot_register_not (int regnum)
+{
+ return 0;
+}
+
+/* Legacy version of target_virtual_frame_pointer(). Assumes that
+ there is an 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)
+{
+ gdb_assert (FP_REGNUM >= 0);
+ *frame_regnum = FP_REGNUM;
+ *frame_offset = 0;
+}
+
+/* Assume the world is flat. Every register is large enough to fit a
+ target integer. */
+
+int
+generic_register_raw_size (int regnum)
+{
+ gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS);
+ return TARGET_INT_BIT / HOST_CHAR_BIT;
+}
+
+/* Assume the virtual size corresponds to the virtual type. */
+
+int
+generic_register_virtual_size (int regnum)
+{
+ return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum));
+}
+
+\f
/* Functions to manipulate the endianness of the target. */
#ifdef TARGET_BYTE_ORDER_SELECTABLE
#ifndef TARGET_BYTE_ORDER_DEFAULT
#define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN /* arbitrary */
#endif
+/* ``target_byte_order'' is only used when non- multi-arch.
+ Multi-arch targets obtain the current byte order using
+ TARGET_BYTE_ORDER which is controlled by gdbarch.*. */
int target_byte_order = TARGET_BYTE_ORDER_DEFAULT;
int target_byte_order_auto = 1;
}
else if (set_endian_string == endian_little)
{
- target_byte_order = LITTLE_ENDIAN;
target_byte_order_auto = 0;
if (GDB_MULTI_ARCH)
{
struct gdbarch_info info;
- memset (&info, 0, sizeof info);
- info.byte_order = LITTLE_ENDIAN;
- gdbarch_update (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 = BIG_ENDIAN;
target_byte_order_auto = 0;
if (GDB_MULTI_ARCH)
{
struct gdbarch_info info;
- memset (&info, 0, sizeof info);
+ gdbarch_info_init (&info);
info.byte_order = BIG_ENDIAN;
- gdbarch_update (info);
+ if (! gdbarch_update_p (info))
+ {
+ printf_unfiltered ("Big endian target not supported by GDB\n");
+ }
+ }
+ else
+ {
+ target_byte_order = BIG_ENDIAN;
}
}
else
- internal_error ("set_endian: bad value");
+ internal_error (__FILE__, __LINE__,
+ "set_endian: bad value");
show_endian (NULL, from_tty);
}
static void
set_endian_from_file (bfd *abfd)
{
+ if (GDB_MULTI_ARCH)
+ internal_error (__FILE__, __LINE__,
+ "set_endian_from_file: not for multi-arch");
if (TARGET_BYTE_ORDER_SELECTABLE_P)
{
int want;
if (bfd_big_endian (abfd))
want = BIG_ENDIAN;
else
- want = LITTLE_ENDIAN;
+ want = BFD_ENDIAN_LITTLE;
if (TARGET_BYTE_ORDER_AUTO)
target_byte_order = want;
else if (TARGET_BYTE_ORDER != want)
arch_ok (const struct bfd_arch_info *arch)
{
if (GDB_MULTI_ARCH)
- internal_error ("arch_ok: not multi-arched");
+ 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. */
enum set_arch type)
{
if (GDB_MULTI_ARCH)
- internal_error ("set_arch: not multi-arched");
+ internal_error (__FILE__, __LINE__,
+ "set_arch: not multi-arched");
switch (type)
{
case set_arch_auto:
break;
}
if (gdbarch_debug)
- gdbarch_dump ();
+ gdbarch_dump (current_gdbarch, gdb_stdlog);
}
/* Set the architecture from arch/machine (deprecated) */
{
const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach);
if (GDB_MULTI_ARCH)
- internal_error ("set_architecture_from_arch_mach: not multi-arched");
+ internal_error (__FILE__, __LINE__,
+ "set_architecture_from_arch_mach: not multi-arched");
if (wanted != NULL)
set_arch (wanted, set_arch_manual);
else
- internal_error ("gdbarch: hardwired architecture/machine not reconized");
+ internal_error (__FILE__, __LINE__,
+ "gdbarch: hardwired architecture/machine not recognized");
}
/* Set the architecture from a BFD (deprecated) */
{
const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd);
if (GDB_MULTI_ARCH)
- internal_error ("set_architecture_from_file: not multi-arched");
+ internal_error (__FILE__, __LINE__,
+ "set_architecture_from_file: not multi-arched");
if (target_architecture_auto)
{
set_arch (wanted, set_arch_auto);
else if (GDB_MULTI_ARCH)
{
struct gdbarch_info info;
- memset (&info, 0, sizeof info);
+ gdbarch_info_init (&info);
info.bfd_arch_info = bfd_scan_arch (set_architecture_string);
if (info.bfd_arch_info == NULL)
- internal_error ("set_architecture: bfd_scan_arch failed");
- if (gdbarch_update (info))
+ 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 reconized.\n",
+ 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 ("set_architecture: bfd_scan_arch failed");
+ internal_error (__FILE__, __LINE__,
+ "set_architecture: bfd_scan_arch failed");
set_arch (arch, set_arch_manual);
}
show_architecture (NULL, from_tty);
}
-/* Called if the user enters ``info architecture'' without an argument. */
-
-static void
-info_architecture (char *args, int from_tty)
-{
- printf_filtered ("Available architectures are:\n");
- if (GDB_MULTI_ARCH)
- {
- const char **arches = gdbarch_printable_names ();
- const char **arch;
- for (arch = arches; *arch != NULL; arch++)
- {
- printf_filtered (" %s", *arch);
- }
- free (arches);
- }
- else
- {
- enum bfd_architecture a;
- for (a = bfd_arch_obscure + 1; a < bfd_arch_last; a++)
- {
- const struct bfd_arch_info *ap;
- for (ap = bfd_lookup_arch (a, 0);
- ap != NULL;
- ap = ap->next)
- {
- printf_filtered (" %s", ap->printable_name);
- ap = ap->next;
- }
- }
- }
- printf_filtered ("\n");
-}
-
-/* Set the dynamic target-system-dependant parameters (architecture,
+/* Set the dynamic target-system-dependent parameters (architecture,
byte-order) using information found in the BFD */
void
-set_gdbarch_from_file (abfd)
- bfd *abfd;
+set_gdbarch_from_file (bfd *abfd)
{
if (GDB_MULTI_ARCH)
{
struct gdbarch_info info;
- memset (&info, 0, sizeof info);
+ gdbarch_info_init (&info);
info.abfd = abfd;
- gdbarch_update (info);
+ if (! gdbarch_update_p (info))
+ error ("Architecture of file not recognized.\n");
}
else
{
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 ();
- const char *chosen = arches[0];
- if (GDB_MULTI_ARCH)
+ /* 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;
- struct gdbarch_info info;
for (arch = arches; *arch != NULL; arch++)
{
- /* Choose the first architecture alphabetically. */
if (strcmp (*arch, chosen) < 0)
chosen = *arch;
}
if (chosen == NULL)
- internal_error ("initialize_current_architecture: No arch");
- memset (&info, 0, sizeof info);
+ 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 ("initialize_current_architecture: Arch not found");
- gdbarch_update (info);
+ internal_error (__FILE__, __LINE__,
+ "initialize_current_architecture: Arch not found");
+ }
+
+ /* take several guesses at a byte order. */
+ /* NB: can't use TARGET_BYTE_ORDER_DEFAULT as its definition is
+ forced above. */
+ 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 = BIG_ENDIAN;
+ 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 = BIG_ENDIAN;
}
- /* Create the ``set architecture'' command prepending ``auto''. */
+ if (GDB_MULTI_ARCH)
+ {
+ if (! gdbarch_update_p (info))
+ {
+ internal_error (__FILE__, __LINE__,
+ "initialize_current_architecture: Selection of initial architecture failed");
+ }
+ }
+ else
+ initialize_non_multiarch ();
+
+ /* Create the ``set architecture'' command appending ``auto'' to the
+ list of architectures. */
{
struct cmd_list_element *c;
/* Append ``auto''. */
current setting. */
add_cmd ("architecture", class_support, show_architecture,
"Show the current target architecture", &showlist);
- c = add_cmd ("architecture", class_support, info_architecture,
- "List supported target architectures", &infolist);
- deprecate_cmd (c, "set architecture");
}
}
+/* 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;
+}
+
/* */
extern initialize_file_ftype _initialize_gdbarch_utils;
projects / binutils-gdb.git / blobdiff