/* Dynamic architecture support for GDB, the GNU debugger.
- Copyright 1998, 1999, 2000, 2001 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 "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 "osabi.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. */
-
-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)
- {
- 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 != BFD_ENDIAN_BIG)
- {
- 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;
+/* 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 */
+}
+
+/* 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);
+}
+
+
+int
+always_use_struct_convention (int gcc_p, struct type *value_type)
+{
+ return 1;
+}
+
+
+int
+legacy_register_sim_regno (int regnum)
+{
+ /* 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;
}
+CORE_ADDR
+generic_skip_solib_resolver (CORE_ADDR pc)
+{
+ return 0;
+}
+
int
generic_in_solib_call_trampoline (CORE_ADDR pc, char *name)
{
}
int
-generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
+generic_in_solib_return_trampoline (CORE_ADDR pc, char *name)
{
return 0;
}
-char *
-legacy_register_name (int i)
+int
+generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
{
-#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
+ return 0;
}
#if defined (CALL_DUMMY)
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;
int
generic_prologue_frameless_p (CORE_ADDR ip)
{
-#ifdef SKIP_PROLOGUE_FRAMELESS_P
- return ip == SKIP_PROLOGUE_FRAMELESS_P (ip);
-#else
return ip == SKIP_PROLOGUE (ip);
-#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 */
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:
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:
/* Misc helper functions for targets. */
int
-frame_num_args_unknown (struct frame_info *fi)
-{
- return -1;
-}
-
-
-int
-generic_register_convertible_not (int num)
+deprecated_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)
+deprecated_init_frame_pc_default (int fromleaf, struct frame_info *prev)
{
- 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;
-
+ 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
-init_frame_pc_noop (int fromleaf, struct frame_info *prev)
+default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym)
{
return;
}
void
-init_frame_pc_default (int fromleaf, struct frame_info *prev)
+default_coff_make_msymbol_special (int val, struct minimal_symbol *msym)
{
- 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 ();
+ return;
}
int
}
/* 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 < 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 flat. Every register is large enough to fit a
- target integer. */
+/* Assume the world is sane, every register's virtual and real size
+ is identical. */
int
-generic_register_raw_size (int regnum)
+generic_register_size (int regnum)
{
gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS);
- return TARGET_INT_BIT / HOST_CHAR_BIT;
+ 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 (DEPRECATED_REGISTER_VIRTUAL_TYPE (regnum)); /* OK */
}
-/* Assume the virtual size corresponds to the virtual type. */
+/* Assume all registers are adjacent. */
int
-generic_register_virtual_size (int regnum)
+generic_register_byte (int regnum)
{
- return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (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, struct type *type)
+{
+ return DEPRECATED_REGISTER_CONVERTIBLE (regnum);
+}
+
+void
+legacy_register_to_value (struct frame_info *frame, int regnum,
+ struct type *type, void *to)
+{
+ char from[MAX_REGISTER_SIZE];
+ get_frame_register (frame, regnum, from);
+ DEPRECATED_REGISTER_CONVERT_TO_VIRTUAL (regnum, type, from, to);
+}
+
+void
+legacy_value_to_register (struct frame_info *frame, int regnum,
+ struct type *type, const void *tmp)
+{
+ char to[MAX_REGISTER_SIZE];
+ char *from = alloca (TYPE_LENGTH (type));
+ memcpy (from, from, TYPE_LENGTH (type));
+ DEPRECATED_REGISTER_CONVERT_TO_RAW (type, regnum, from, to);
+ put_frame_register (frame, regnum, to);
+}
+
+int
+default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type)
+{
+ if (DEPRECATED_REG_STRUCT_HAS_ADDR_P ()
+ && DEPRECATED_REG_STRUCT_HAS_ADDR (processing_gcc_compilation, type))
+ {
+ CHECK_TYPEDEF (type);
+
+ return (TYPE_CODE (type) == TYPE_CODE_STRUCT
+ || TYPE_CODE (type) == TYPE_CODE_UNION
+ || TYPE_CODE (type) == TYPE_CODE_SET
+ || TYPE_CODE (type) == TYPE_CODE_BITSTRING);
+ }
+
+ return 0;
}
\f
/* 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 BFD_ENDIAN_BIG */
-#ifndef TARGET_BYTE_ORDER_DEFAULT
-#define TARGET_BYTE_ORDER_DEFAULT BFD_ENDIAN_BIG
-#endif
-#endif
-#if !TARGET_BYTE_ORDER_SELECTABLE_P
-#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
-#endif
-#ifndef TARGET_BYTE_ORDER_DEFAULT
-#define TARGET_BYTE_ORDER_DEFAULT BFD_ENDIAN_BIG /* 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;
+ 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 void
set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c)
{
- if (!TARGET_BYTE_ORDER_SELECTABLE_P)
- {
- printf_unfiltered ("Byte order is not selectable.");
- }
- else if (set_endian_string == endian_auto)
+ if (set_endian_string == endian_auto)
{
target_byte_order_auto = 1;
}
else if (set_endian_string == endian_little)
{
+ struct gdbarch_info info;
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;
- }
+ 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 if (set_endian_string == endian_big)
{
+ struct gdbarch_info info;
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;
- }
+ 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
internal_error (__FILE__, __LINE__,
show_endian (NULL, from_tty);
}
-/* Set the endianness from a BFD. */
-
-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 = 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");
- }
- else
- {
- if (bfd_big_endian (abfd)
- ? TARGET_BYTE_ORDER != BFD_ENDIAN_BIG
- : TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
- warning ("%s endian file does not match %s endian target.",
- bfd_big_endian (abfd) ? "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 };
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. */
{
target_architecture_auto = 1;
}
- else if (GDB_MULTI_ARCH)
+ else
{
struct gdbarch_info info;
gdbarch_info_init (&info);
printf_unfiltered ("Architecture `%s' not recognized.\n",
set_architecture_string);
}
- else
+ show_architecture (NULL, from_tty);
+}
+
+/* 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;
}
- show_architecture (NULL, from_tty);
+
+ /* 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;
+}
+
+/* FIXME: kettenis/20031124: Of the functions that follow, only
+ gdbarch_from_bfd is supposed to survive. The others will
+ dissappear since in the future GDB will (hopefully) be truly
+ multi-arch. However, for now we're still stuck with the concept of
+ a single active architecture. */
+
+/* Make GDBARCH the currently selected architecture. */
+
+static void
+deprecated_select_gdbarch_hack (struct gdbarch *gdbarch)
+{
+ struct gdbarch_info info;
+
+ /* FIXME: kettenis/20031024: The only way to select a specific
+ architecture is to clone its `struct gdbarch_info', and update
+ according to that copy. This is gross, but significant work will
+ need to be done before we can take a more sane approach. */
+ gdbarch_info_init (&info);
+ info.bfd_arch_info = gdbarch_bfd_arch_info (gdbarch);
+ info.byte_order = gdbarch_byte_order (gdbarch);
+ info.osabi = gdbarch_osabi (gdbarch);
+ gdbarch_update_p (info);
+ gdb_assert (gdbarch == current_gdbarch);
+}
+
+/* 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;
+
+ /* FIXME: kettenis/20031024: The only way to find the architecture
+ for a certain BFD is by doing an architecture update. This
+ activates the architecture, so we need to reactivate the old
+ architecture. This is gross, but significant work will need to
+ be done before we can take a more sane approach. */
+ gdbarch_info_init (&info);
+ info.abfd = abfd;
+ if (! gdbarch_update_p (info))
+ return NULL;
+
+ new_gdbarch = current_gdbarch;
+ deprecated_select_gdbarch_hack (old_gdbarch);
+ return new_gdbarch;
}
/* 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.\n");
+ deprecated_select_gdbarch_hack (gdbarch);
}
/* Initialize the current architecture. Update the ``set
"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. */
+ /* Take several guesses at a byte order. */
if (info.byte_order == BFD_ENDIAN_UNKNOWN
&& default_bfd_vec != NULL)
{
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
- initialize_non_multiarch ();
+ 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, &set_architecture_string,
"Set architecture of target.",
&setlist);
- c->function.sfunc = set_architecture;
+ 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. */
/* 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 it init, but this time fill in the blanks. Information is
+ obtained from the specified architecture, global "set ..." options,
+ and explicitly initialized INFO fields. */
+
+void
+gdbarch_info_fill (struct gdbarch *gdbarch, struct gdbarch_info *info)
+{
+ /* "(gdb) set architecture ...". */
+ if (info->bfd_arch_info == NULL
+ && !target_architecture_auto
+ && gdbarch != NULL)
+ info->bfd_arch_info = gdbarch_bfd_arch_info (gdbarch);
+ 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);
+ if (info->bfd_arch_info == NULL
+ && gdbarch != NULL)
+ info->bfd_arch_info = gdbarch_bfd_arch_info (gdbarch);
+
+ /* "(gdb) set byte-order ...". */
+ if (info->byte_order == BFD_ENDIAN_UNKNOWN
+ && !target_byte_order_auto
+ && gdbarch != NULL)
+ info->byte_order = gdbarch_byte_order (gdbarch);
+ /* 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 current target. */
+ if (info->byte_order == BFD_ENDIAN_UNKNOWN
+ && gdbarch != NULL)
+ info->byte_order = gdbarch_byte_order (gdbarch);
+
+ /* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */
+ if (info->osabi == GDB_OSABI_UNINITIALIZED)
+ info->osabi = gdbarch_lookup_osabi (info->abfd);
+ if (info->osabi == GDB_OSABI_UNINITIALIZED
+ && gdbarch != NULL)
+ info->osabi = gdbarch_osabi (gdbarch);
+
+ /* 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)
endian_enum, &set_endian_string,
"Set endianness of target.",
&setlist);
- c->function.sfunc = set_endian;
+ 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,
projects / deliverable / binutils-gdb.git / blobdiff