/* Dynamic architecture support for GDB, the GNU debugger.
- Copyright 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
+
+ Copyright 1998, 1999, 2000, 2001, 2002 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
#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 "version.h"
#include "floatformat.h"
-/* Convenience macro for allocting typesafe memory. */
-
-#ifndef XMALLOC
-#define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE))
-#endif
-
-
/* 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,
and optionally adjust the pc to point to the correct memory location
for inserting the breakpoint. */
-unsigned char *
+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 == BIG_ENDIAN)
+ if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
{
static unsigned char big_break_insn[] = BIG_BREAKPOINT;
*lenptr = sizeof (big_break_insn);
}
#endif
#ifdef LITTLE_BREAKPOINT
- if (TARGET_BYTE_ORDER != BIG_ENDIAN)
+ if (TARGET_BYTE_ORDER != BFD_ENDIAN_BIG)
{
static unsigned char little_break_insn[] = LITTLE_BREAKPOINT;
*lenptr = sizeof (little_break_insn);
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)
{
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 */
#endif
switch (byte_order)
{
- case BIG_ENDIAN:
+ case BFD_ENDIAN_BIG:
return &floatformat_ieee_single_big;
- case LITTLE_ENDIAN:
+ case BFD_ENDIAN_LITTLE:
return &floatformat_ieee_single_little;
default:
internal_error (__FILE__, __LINE__,
#endif
switch (byte_order)
{
- case BIG_ENDIAN:
+ case BFD_ENDIAN_BIG:
return &floatformat_ieee_double_big;
- case LITTLE_ENDIAN:
+ case BFD_ENDIAN_LITTLE:
return &floatformat_ieee_double_little;
default:
internal_error (__FILE__, __LINE__,
}
}
+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
}
+/* 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
-default_convert_from_func_ptr_addr (CORE_ADDR addr)
+core_addr_identity (CORE_ADDR addr)
{
return addr;
}
return fi->frame;
}
-/* Functions to manipulate the endianness of the target. */
+/* Default prepare_to_procced(). */
+int
+default_prepare_to_proceed (int select_it)
+{
+ return 0;
+}
-#ifdef TARGET_BYTE_ORDER_SELECTABLE
-/* compat - Catch old targets that expect a selectable byte-order to
- default to BIG_ENDIAN */
-#ifndef TARGET_BYTE_ORDER_DEFAULT
-#define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
-#endif
-#endif
-#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
+/* 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)
+{
+ 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 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 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);
+ return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum));
+}
+
+#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
-#ifndef TARGET_BYTE_ORDER_DEFAULT
-#define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN /* arbitrary */
#endif
+\f
+int
+legacy_pc_in_sigtramp (CORE_ADDR pc, char *name)
+{
+ return IN_SIGTRAMP(pc, name);
+}
+
+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
- 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";
{
if (TARGET_BYTE_ORDER_AUTO)
printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n",
- (TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"));
+ (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little"));
else
printf_unfiltered ("The target is assumed to be %s endian\n",
- (TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"));
+ (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little"));
}
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;
}
if (GDB_MULTI_ARCH)
{
struct gdbarch_info info;
- memset (&info, 0, sizeof info);
- info.byte_order = LITTLE_ENDIAN;
+ 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 = LITTLE_ENDIAN;
+ target_byte_order = BFD_ENDIAN_LITTLE;
}
}
else if (set_endian_string == endian_big)
if (GDB_MULTI_ARCH)
{
struct gdbarch_info info;
- memset (&info, 0, sizeof info);
- info.byte_order = BIG_ENDIAN;
+ 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 = BIG_ENDIAN;
+ target_byte_order = BFD_ENDIAN_BIG;
}
}
else
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 (TARGET_BYTE_ORDER_SELECTABLE_P)
- {
- int want;
-
- if (bfd_big_endian (abfd))
- want = BIG_ENDIAN;
- else
- want = LITTLE_ENDIAN;
- if (TARGET_BYTE_ORDER_AUTO)
- target_byte_order = want;
- else if (TARGET_BYTE_ORDER != want)
- warning ("%s endian file does not match %s endian target.",
- want == BIG_ENDIAN ? "big" : "little",
- TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little");
- }
+ if (bfd_big_endian (abfd))
+ want = BFD_ENDIAN_BIG;
else
- {
- if (bfd_big_endian (abfd)
- ? TARGET_BYTE_ORDER != BIG_ENDIAN
- : TARGET_BYTE_ORDER == BIG_ENDIAN)
- warning ("%s endian file does not match %s endian target.",
- bfd_big_endian (abfd) ? "big" : "little",
- TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little");
- }
+ 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 (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 (__FILE__, __LINE__,
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);
- }
- xfree (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-dependent parameters (architecture,
byte-order) using information found in the BFD */
if (GDB_MULTI_ARCH)
{
struct gdbarch_info info;
- memset (&info, 0, sizeof info);
+ gdbarch_info_init (&info);
info.abfd = abfd;
if (! gdbarch_update_p (info))
error ("Architecture of file not recognized.\n");
/* determine a default architecture and byte order. */
struct gdbarch_info info;
- memset (&info, 0, sizeof (info));
+ gdbarch_info_init (&info);
/* Find a default architecture. */
if (info.bfd_arch_info == NULL
"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 == 0
+ /* 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 = BIG_ENDIAN;
+ info.byte_order = BFD_ENDIAN_BIG;
break;
case BFD_ENDIAN_LITTLE:
- info.byte_order = LITTLE_ENDIAN;
+ info.byte_order = BFD_ENDIAN_LITTLE;
break;
default:
break;
}
}
- if (info.byte_order == 0)
+ if (info.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 = LITTLE_ENDIAN;
+ info.byte_order = BFD_ENDIAN_LITTLE;
}
- if (info.byte_order == 0)
+ if (info.byte_order == BFD_ENDIAN_UNKNOWN)
{
/* Wire it to big-endian!!! */
- info.byte_order = BIG_ENDIAN;
+ info.byte_order = BFD_ENDIAN_BIG;
}
if (GDB_MULTI_ARCH)
"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. */
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. */
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;
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