diff options
Diffstat (limited to 'gdb/arch-utils.c')
| -rw-r--r-- | gdb/arch-utils.c | 488 |
1 files changed, 480 insertions, 8 deletions
diff --git a/gdb/arch-utils.c b/gdb/arch-utils.c index be2433d37e6..8af1373ffea 100644 --- a/gdb/arch-utils.c +++ b/gdb/arch-utils.c @@ -41,6 +41,8 @@ #include "symfile.h" /* for overlay functions */ #endif +#include "version.h" + #include "floatformat.h" /* Convenience macro for allocting typesafe memory. */ @@ -149,17 +151,13 @@ generic_prologue_frameless_p (CORE_ADDR ip) /* 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); } @@ -206,11 +204,485 @@ default_double_format (struct gdbarch *gdbarch) } } +/* 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; +} + + +/* 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 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 +#endif +#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; + +static const char endian_big[] = "big"; +static const char endian_little[] = "little"; +static const char endian_auto[] = "auto"; +static const char *endian_enum[] = +{ + endian_big, + endian_little, + endian_auto, + NULL, +}; +static const char *set_endian_string; + +/* 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 == BIG_ENDIAN ? "big" : "little")); + else + printf_unfiltered ("The target is assumed to be %s endian\n", + (TARGET_BYTE_ORDER == BIG_ENDIAN ? "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) + { + target_byte_order_auto = 1; + } + else if (set_endian_string == endian_little) + { + 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); + } + else + { + target_byte_order = LITTLE_ENDIAN; + } + } + else if (set_endian_string == endian_big) + { + target_byte_order_auto = 0; + if (GDB_MULTI_ARCH) + { + struct gdbarch_info info; + memset (&info, 0, sizeof info); + info.byte_order = BIG_ENDIAN; + gdbarch_update (info); + } + else + { + target_byte_order = BIG_ENDIAN; + } + } + else + internal_error ("set_endian: bad value"); + 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 ("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"); + } + 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"); + } +} + + +/* Functions to manipulate the architecture of the target */ + +enum set_arch { set_arch_auto, set_arch_manual }; + +int target_architecture_auto = 1; + +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 ("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 ("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 ("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"); +} + +/* 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 ("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. */ + +static void +show_architecture (char *args, int from_tty) +{ + const char *arch; + arch = TARGET_ARCHITECTURE->printable_name; + if (target_architecture_auto) + printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); + else + printf_filtered ("The target architecture is assumed to be %s\n", arch); +} + + +/* Called if the user enters ``set architecture'' with or without an + argument. */ + +static void +set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) +{ + if (strcmp (set_architecture_string, "auto") == 0) + { + target_architecture_auto = 1; + } + else if (GDB_MULTI_ARCH) + { + struct gdbarch_info info; + memset (&info, 0, sizeof 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)) + target_architecture_auto = 0; + else + printf_unfiltered ("Architecture `%s' not reconized.\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"); + 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, + byte-order) using information found in the BFD */ + +void +set_gdbarch_from_file (bfd *abfd) +{ + if (GDB_MULTI_ARCH) + { + struct gdbarch_info info; + memset (&info, 0, sizeof info); + info.abfd = abfd; + gdbarch_update (info); + } + else + { + set_architecture_from_file (abfd); + set_endian_from_file (abfd); + } +} + +/* Initialize the current architecture. Update the ``set + 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 (); + + /* 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; + for (arch = arches; *arch != NULL; arch++) + { + if (strcmp (*arch, chosen) < 0) + chosen = *arch; + } + if (chosen == NULL) + internal_error ("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"); + } + + /* 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 appending ``auto'' to the + list of architectures. */ + { + struct cmd_list_element *c; + /* Append ``auto''. */ + int nr; + for (nr = 0; arches[nr] != NULL; nr++); + 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); + c->function.sfunc = 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"); + } +} + + /* */ -extern initialize_file_ftype __initialize_gdbarch_utils; +extern initialize_file_ftype _initialize_gdbarch_utils; void -__initialize_gdbarch_utils (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); + c->function.sfunc = 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); } |