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Use config.bfd to determine the default architecture and byte order.

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Flush all BYTE_ORDER_DEFAULT macros from mips. Can rely on BFD's value.
This commit is contained in:
Andrew Cagney
2000-06-08 04:00:56 +00:00
parent e28d556f6b
commit 1ba607adba
10 changed files with 492 additions and 345 deletions
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90
gdb/arch-utils.c
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@ -41,6 +41,8 @@
#include "symfile.h" /* for overlay functions */
#endif
#include "version.h"
#include "floatformat.h"
/* Convenience macro for allocting typesafe memory. */
@ -246,6 +248,9 @@ generic_register_convertible_not (num)
#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;
@ -287,7 +292,6 @@ set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c)
}
else if (set_endian_string == endian_little)
{
target_byte_order = LITTLE_ENDIAN;
target_byte_order_auto = 0;
if (GDB_MULTI_ARCH)
{
@ -296,10 +300,13 @@ set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c)
info.byte_order = LITTLE_ENDIAN;
gdbarch_update (info);
}
else
{
target_byte_order = LITTLE_ENDIAN;
}
}
else if (set_endian_string == endian_big)
{
target_byte_order = BIG_ENDIAN;
target_byte_order_auto = 0;
if (GDB_MULTI_ARCH)
{
@ -308,6 +315,10 @@ set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c)
info.byte_order = BIG_ENDIAN;
gdbarch_update (info);
}
else
{
target_byte_order = BIG_ENDIAN;
}
}
else
internal_error ("set_endian: bad value");
@ -319,6 +330,8 @@ set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c)
static void
set_endian_from_file (bfd *abfd)
{
if (GDB_MULTI_ARCH)
internal_error ("set_endian_from_file: not for multi-arch");
if (TARGET_BYTE_ORDER_SELECTABLE_P)
{
int want;
@ -547,32 +560,93 @@ set_gdbarch_from_file (abfd)
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;
memset (&info, 0, sizeof (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);
info.bfd_arch_info = bfd_scan_arch (chosen);
if (info.bfd_arch_info == NULL)
internal_error ("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
&& 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 = LITTLE_ENDIAN;
break;
default:
break;
}
}
if (info.byte_order == 0)
{
/* 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 = LITTLE_ENDIAN;
}
if (info.byte_order == 0)
{
/* Wire it to big-endian!!! */
info.byte_order = BIG_ENDIAN;
}
if (GDB_MULTI_ARCH)
{
gdbarch_update (info);
}
/* Create the ``set architecture'' command prepending ``auto''. */
/* Create the ``set architecture'' command appending ``auto'' to the
list of architectures. */
{
struct cmd_list_element *c;
/* Append ``auto''. */