/* Dynamic architecture support for GDB, the GNU debugger.
- Copyright 1998, 1999, 2000, 2001, 2002 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 "symtab.h"
-#include "frame.h"
-#include "inferior.h"
-#include "breakpoint.h"
-#include "gdb_wait.h"
-#include "gdbcore.h"
-#include "gdbcmd.h"
-#include "target.h"
-#include "annotate.h"
-#endif
#include "regcache.h"
#include "gdb_assert.h"
+#include "sim-regno.h"
+#include "gdbcore.h"
+#include "osabi.h"
+#include "target-descriptions.h"
#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
- 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. */
-
-const 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 == BFD_ENDIAN_BIG)
+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));
+
+ 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 != BFD_ENDIAN_BIG)
+
+ 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
-generic_frameless_function_invocation_not (struct frame_info *fi)
-{
- return 0;
+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;
}
-int
-generic_return_value_on_stack_not (struct type *type)
+CORE_ADDR
+generic_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
{
return 0;
}
CORE_ADDR
-generic_skip_trampoline_code (CORE_ADDR pc)
+generic_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc)
{
return 0;
}
int
-generic_in_solib_call_trampoline (CORE_ADDR pc, char *name)
+generic_in_solib_return_trampoline (CORE_ADDR pc, char *name)
{
return 0;
}
return 0;
}
-char *
-legacy_register_name (int i)
-{
-#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 (__FILE__, __LINE__,
- "legacy_register_name: called.");
- return NULL;
-#endif
-}
-
-#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);
-
-void
-generic_remote_translate_xfer_address (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 (*tm_print_insn) (vma, info);
-}
-
-/* Helper functions for INNER_THAN */
+/* Helper functions for gdbarch_inner_than */
int
core_addr_lessthan (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");
- }
-}
-
-void
-default_print_float_info (void)
-{
-#ifdef FLOAT_INFO
-#if GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL
-#error "FLOAT_INFO defined in multi-arch"
-#endif
- FLOAT_INFO;
-#else
- printf_filtered ("No floating point info available for this processor.\n");
-#endif
-}
-
/* Misc helper functions for targets. */
-int
-frame_num_args_unknown (struct frame_info *fi)
-{
- return -1;
-}
-
-
-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;
-}
-
-int
-default_register_sim_regno (int num)
+core_addr_identity (CORE_ADDR addr)
{
- return num;
+ return addr;
}
-
CORE_ADDR
-core_addr_identity (CORE_ADDR addr)
+convert_from_func_ptr_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr,
+ struct target_ops *targ)
{
return addr;
}
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 ());
- }
- /* 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 ();
-}
-
void
default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym)
{
}
/* Legacy version of target_virtual_frame_pointer(). Assumes that
- there is an FP_REGNUM and that it is the same, cooked or raw. */
+ 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)
{
- gdb_assert (FP_REGNUM >= 0);
- *frame_regnum = FP_REGNUM;
+ /* 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;
}
-/* Assume the world is sane, every register's virtual and real size
- is identical. */
+\f
+int
+generic_convert_register_p (int regnum, struct type *type)
+{
+ return 0;
+}
int
-generic_register_size (int regnum)
+default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type)
{
- gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS);
- return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum));
+ return 0;
}
-#if !defined (IN_SIGTRAMP)
-#if defined (SIGTRAMP_START)
-#define IN_SIGTRAMP(pc, name) \
- ((pc) >= SIGTRAMP_START(pc) \
- && (pc) < SIGTRAMP_END(pc) \
- )
-#else
-#define IN_SIGTRAMP(pc, name) \
- (name && STREQ ("_sigtramp", name))
-#endif
-#endif
-\f
int
-legacy_pc_in_sigtramp (CORE_ADDR pc, char *name)
+generic_instruction_nullified (struct gdbarch *gdbarch,
+ struct regcache *regcache)
{
- return IN_SIGTRAMP(pc, name);
+ return 0;
+}
+
+int
+default_remote_register_number (struct gdbarch *gdbarch,
+ int regno)
+{
+ return regno;
}
\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 int target_byte_order_user = BFD_ENDIAN_UNKNOWN;
static const char endian_big[] = "big";
static const char endian_little[] = "little";
};
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 (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"));
+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
- printf_unfiltered ("The target is assumed to be %s endian\n",
- (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little"));
+ 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_auto = 1;
+ 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)
{
- 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");
- }
- }
+ 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;
- }
+ target_byte_order_user = 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");
- }
- }
+ 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;
- }
+ target_byte_order_user = BFD_ENDIAN_BIG;
}
else
internal_error (__FILE__, __LINE__,
- "set_endian: bad value");
- show_endian (NULL, from_tty);
-}
+ _("set_endian: bad value"));
-/* 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");
+ 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. */
-/* Functions to manipulate the architecture of the target */
+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;
-enum set_arch { set_arch_auto, set_arch_manual };
+ if (selected == NULL)
+ return from_target;
-int target_architecture_auto = 1;
+ if (from_target == NULL)
+ return selected;
-const char *set_architecture_string;
+ /* 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;
-/* Old way of changing the current architecture. */
+ /* 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.
-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);
+ 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. */
-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));
-}
+ compat1 = selected->compatible (selected, from_target);
+ compat2 = from_target->compatible (from_target, selected);
-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)
+ if (compat1 == NULL && compat2 == NULL)
{
- 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;
+ warning (_("Selected architecture %s is not compatible "
+ "with reported target architecture %s"),
+ selected->printable_name, from_target->printable_name);
+ return selected;
}
- if (gdbarch_debug)
- gdbarch_dump (current_gdbarch, gdb_stdlog);
+
+ 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;
}
-/* Set the architecture from arch/machine (deprecated) */
+/* Functions to manipulate the architecture of the target */
-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");
-}
+enum set_arch { set_arch_auto, set_arch_manual };
-/* Set the architecture from a BFD (deprecated) */
+static const struct bfd_arch_info *target_architecture_user;
-static void
-set_architecture_from_file (bfd *abfd)
+static const char *set_architecture_string;
+
+const char *
+selected_architecture_name (void)
{
- 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);
- }
+ 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 (char *args, int from_tty)
+show_architecture (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
{
const char *arch;
- arch = TARGET_ARCHITECTURE->printable_name;
- if (target_architecture_auto)
- printf_filtered ("The target architecture is set automatically (currently %s)\n", 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
- printf_filtered ("The target architecture is assumed to be %s\n", arch);
+ fprintf_filtered (file, _("\
+The target architecture is assumed to be %s\n"), arch);
}
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_auto = 1;
+ target_architecture_user = NULL;
+ if (!gdbarch_update_p (info))
+ internal_error (__FILE__, __LINE__,
+ _("could not select an architecture automatically"));
}
- else if (GDB_MULTI_ARCH)
+ else
{
- 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");
+ _("set_architecture: bfd_scan_arch failed"));
if (gdbarch_update_p (info))
- target_architecture_auto = 0;
+ target_architecture_user = info.bfd_arch_info;
else
- printf_unfiltered ("Architecture `%s' not recognized.\n",
+ printf_unfiltered (_("Architecture `%s' not recognized.\n"),
set_architecture_string);
}
- else
+ 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)
{
- 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);
+ 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;
}
- show_architecture (NULL, from_tty);
+
+ /* 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,
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);
- }
+ 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
static const bfd_target *default_bfd_vec;
#endif
+static int default_byte_order = BFD_ENDIAN_UNKNOWN;
+
void
initialize_current_architecture (void)
{
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)
+ if (default_bfd_arch == NULL)
{
/* Choose the architecture by taking the first one
alphabetically. */
}
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)
+ _("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");
+ _("initialize_current_architecture: Arch not found"));
}
+ info.bfd_arch_info = default_bfd_arch;
+
/* Take several guesses at a byte order. */
- if (info.byte_order == BFD_ENDIAN_UNKNOWN
+ 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:
- info.byte_order = BFD_ENDIAN_BIG;
+ default_byte_order = BFD_ENDIAN_BIG;
break;
case BFD_ENDIAN_LITTLE:
- info.byte_order = BFD_ENDIAN_LITTLE;
+ default_byte_order = BFD_ENDIAN_LITTLE;
break;
default:
break;
}
}
- if (info.byte_order == BFD_ENDIAN_UNKNOWN)
+ if (default_byte_order == BFD_ENDIAN_UNKNOWN)
{
/* look for ``*el-*'' in the target name. */
const char *chp;
if (chp != NULL
&& chp - 2 >= target_name
&& strncmp (chp - 2, "el", 2) == 0)
- info.byte_order = BFD_ENDIAN_LITTLE;
+ default_byte_order = BFD_ENDIAN_LITTLE;
}
- if (info.byte_order == BFD_ENDIAN_UNKNOWN)
+ if (default_byte_order == BFD_ENDIAN_UNKNOWN)
{
/* Wire it to big-endian!!! */
- info.byte_order = BFD_ENDIAN_BIG;
+ default_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 ();
- }
+ 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. */
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_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);
- /* 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
+ 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. */
{
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)
{
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);
+ 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