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Diffstat (limited to 'gdb/arch-utils.c')
| -rw-r--r-- | gdb/arch-utils.c | 861 |
1 files changed, 0 insertions, 861 deletions
diff --git a/gdb/arch-utils.c b/gdb/arch-utils.c deleted file mode 100644 index 5612ddf841c..00000000000 --- a/gdb/arch-utils.c +++ /dev/null @@ -1,861 +0,0 @@ -/* Dynamic architecture support for GDB, the GNU debugger. - Copyright 1998, 1999, 2000, 2001 Free Software Foundation, Inc. - - This file is part of GDB. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - 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. */ - -#include "defs.h" - -#if GDB_MULTI_ARCH -#include "arch-utils.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 "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; -} - -int -generic_frameless_function_invocation_not (struct frame_info *fi) -{ - return 0; -} - -int -generic_return_value_on_stack_not (struct type *type) -{ - 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) -{ -#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) -{ -#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 */ - -int -core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) -{ - return (lhs < rhs); -} - -int -core_addr_greaterthan (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) -{ - return num; -} - - -CORE_ADDR -core_addr_identity (CORE_ADDR addr) -{ - return addr; -} - -int -no_op_reg_to_regnum (int reg) -{ - 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 (), 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; - -} - -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 flat. Every register is large enough to fit a - target integer. */ - -int -generic_register_raw_size (int regnum) -{ - gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); - return TARGET_INT_BIT / HOST_CHAR_BIT; -} - -/* Assume the virtual size corresponds to the virtual type. */ - -int -generic_register_virtual_size (int regnum) -{ - return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum)); -} - - -/* 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 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 == BFD_ENDIAN_BIG ? "big" : "little")); - else - printf_unfiltered ("The target is assumed to be %s endian\n", - (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); -} - -static void -set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) -{ - 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; - 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; - } - } - 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"); - } - } - else - { - target_byte_order = BFD_ENDIAN_BIG; - } - } - else - internal_error (__FILE__, __LINE__, - "set_endian: bad value"); - show_endian (NULL, from_tty); -} - -/* 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"); -} - - -/* 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 (__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. */ - -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; - 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"); - if (gdbarch_update_p (info)) - target_architecture_auto = 0; - else - printf_unfiltered ("Architecture `%s' not recognized.\n", - set_architecture_string); - } - else - { - 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); - } - show_architecture (NULL, from_tty); -} - -/* Set the dynamic target-system-dependent 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; - 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); - } -} - -/* 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; - 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) - { - /* 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 (__FILE__, __LINE__, - "initialize_current_architecture: No arch"); - info.bfd_arch_info = bfd_scan_arch (chosen); - if (info.bfd_arch_info == NULL) - internal_error (__FILE__, __LINE__, - "initialize_current_architecture: Arch not found"); - } - - /* 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 = BFD_ENDIAN_BIG; - break; - case BFD_ENDIAN_LITTLE: - info.byte_order = BFD_ENDIAN_LITTLE; - break; - default: - break; - } - } - if (info.byte_order == BFD_ENDIAN_UNKNOWN) - { - /* 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 = BFD_ENDIAN_LITTLE; - } - if (info.byte_order == BFD_ENDIAN_UNKNOWN) - { - /* Wire it to big-endian!!! */ - 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 - { - /* 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. */ - { - 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); - 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); - } -} - - -/* 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; - -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); -} |