5d6eb653a4
* arch-utils.h (init_frame_pc_noop): Delete declaration. * arch-utils.c (init_frame_pc_noop): Delete function. * mn10300-tdep.c (mn10300_gdbarch_init): Do not set "init_frame_pc". * mips-tdep.c (mips_gdbarch_init): Ditto. * i386-interix-tdep.c (i386_interix_init_abi): Ditto. * config/sparc/tm-sparc.h (init_frame_pc_noop): Delete declaration. (DEPRECATED_INIT_FRAME_PC): Delete macro. * config/rs6000/tm-rs6000.h (init_frame_pc_noop): Delete declaration. (DEPRECATED_INIT_FRAME_PC): Delete macro.
651 lines
17 KiB
C
651 lines
17 KiB
C
/* Dynamic architecture support for GDB, the GNU debugger.
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Copyright 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation,
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Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "arch-utils.h"
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#include "buildsym.h"
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#include "gdbcmd.h"
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#include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */
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#include "gdb_string.h"
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#include "regcache.h"
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#include "gdb_assert.h"
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#include "sim-regno.h"
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#include "version.h"
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#include "floatformat.h"
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/* Implementation of extract return value that grubs around in the
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register cache. */
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void
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legacy_extract_return_value (struct type *type, struct regcache *regcache,
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void *valbuf)
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{
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char *registers = deprecated_grub_regcache_for_registers (regcache);
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bfd_byte *buf = valbuf;
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DEPRECATED_EXTRACT_RETURN_VALUE (type, registers, buf); /* OK */
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}
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/* Implementation of store return value that grubs the register cache.
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Takes a local copy of the buffer to avoid const problems. */
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void
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legacy_store_return_value (struct type *type, struct regcache *regcache,
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const void *buf)
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{
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bfd_byte *b = alloca (TYPE_LENGTH (type));
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gdb_assert (regcache == current_regcache);
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memcpy (b, buf, TYPE_LENGTH (type));
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DEPRECATED_STORE_RETURN_VALUE (type, b);
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}
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int
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always_use_struct_convention (int gcc_p, struct type *value_type)
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{
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return 1;
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}
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int
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legacy_register_sim_regno (int regnum)
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{
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/* Only makes sense to supply raw registers. */
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gdb_assert (regnum >= 0 && regnum < NUM_REGS);
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/* NOTE: cagney/2002-05-13: The old code did it this way and it is
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suspected that some GDB/SIM combinations may rely on this
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behavour. The default should be one2one_register_sim_regno
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(below). */
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if (REGISTER_NAME (regnum) != NULL
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&& REGISTER_NAME (regnum)[0] != '\0')
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return regnum;
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else
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return LEGACY_SIM_REGNO_IGNORE;
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}
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int
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generic_frameless_function_invocation_not (struct frame_info *fi)
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{
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return 0;
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}
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int
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generic_return_value_on_stack_not (struct type *type)
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{
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return 0;
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}
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CORE_ADDR
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generic_skip_trampoline_code (CORE_ADDR pc)
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{
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return 0;
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}
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int
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generic_in_solib_call_trampoline (CORE_ADDR pc, char *name)
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{
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return 0;
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}
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int
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generic_in_solib_return_trampoline (CORE_ADDR pc, char *name)
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{
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return 0;
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}
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int
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generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
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{
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return 0;
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}
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#if defined (CALL_DUMMY)
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LONGEST legacy_call_dummy_words[] = CALL_DUMMY;
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#else
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LONGEST legacy_call_dummy_words[1];
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#endif
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int legacy_sizeof_call_dummy_words = sizeof (legacy_call_dummy_words);
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void
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generic_remote_translate_xfer_address (struct gdbarch *gdbarch,
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struct regcache *regcache,
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CORE_ADDR gdb_addr, int gdb_len,
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CORE_ADDR * rem_addr, int *rem_len)
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{
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*rem_addr = gdb_addr;
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*rem_len = gdb_len;
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}
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int
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generic_prologue_frameless_p (CORE_ADDR ip)
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{
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return ip == SKIP_PROLOGUE (ip);
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}
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/* Helper functions for INNER_THAN */
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int
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core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs)
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{
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return (lhs < rhs);
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}
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int
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core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs)
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{
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return (lhs > rhs);
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}
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/* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */
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const struct floatformat *
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default_float_format (struct gdbarch *gdbarch)
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{
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int byte_order = gdbarch_byte_order (gdbarch);
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switch (byte_order)
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{
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case BFD_ENDIAN_BIG:
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return &floatformat_ieee_single_big;
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case BFD_ENDIAN_LITTLE:
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return &floatformat_ieee_single_little;
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default:
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internal_error (__FILE__, __LINE__,
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"default_float_format: bad byte order");
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}
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}
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const struct floatformat *
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default_double_format (struct gdbarch *gdbarch)
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{
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int byte_order = gdbarch_byte_order (gdbarch);
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switch (byte_order)
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{
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case BFD_ENDIAN_BIG:
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return &floatformat_ieee_double_big;
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case BFD_ENDIAN_LITTLE:
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return &floatformat_ieee_double_little;
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default:
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internal_error (__FILE__, __LINE__,
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"default_double_format: bad byte order");
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}
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}
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/* Misc helper functions for targets. */
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int
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deprecated_register_convertible_not (int num)
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{
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return 0;
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}
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/* Under some ABI's that specify the `struct convention' for returning
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structures by value, by the time we've returned from the function,
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the return value is sitting there in the caller's buffer, but GDB
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has no way to find the address of that buffer.
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On such architectures, use this function as your
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extract_struct_value_address method. When asked to a struct
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returned by value in this fashion, GDB will print a nice error
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message, instead of garbage. */
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CORE_ADDR
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generic_cannot_extract_struct_value_address (char *dummy)
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{
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return 0;
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}
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CORE_ADDR
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core_addr_identity (CORE_ADDR addr)
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{
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return addr;
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}
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int
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no_op_reg_to_regnum (int reg)
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{
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return reg;
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}
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CORE_ADDR
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init_frame_pc_default (int fromleaf, struct frame_info *prev)
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{
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if (fromleaf && DEPRECATED_SAVED_PC_AFTER_CALL_P ())
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return DEPRECATED_SAVED_PC_AFTER_CALL (get_next_frame (prev));
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else if (get_next_frame (prev) != NULL)
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return DEPRECATED_FRAME_SAVED_PC (get_next_frame (prev));
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else
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return read_pc ();
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}
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void
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default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym)
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{
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return;
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}
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void
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default_coff_make_msymbol_special (int val, struct minimal_symbol *msym)
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{
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return;
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}
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int
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cannot_register_not (int regnum)
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{
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return 0;
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}
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/* Legacy version of target_virtual_frame_pointer(). Assumes that
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there is an DEPRECATED_FP_REGNUM and that it is the same, cooked or
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raw. */
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void
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legacy_virtual_frame_pointer (CORE_ADDR pc,
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int *frame_regnum,
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LONGEST *frame_offset)
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{
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/* FIXME: cagney/2002-09-13: This code is used when identifying the
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frame pointer of the current PC. It is assuming that a single
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register and an offset can determine this. I think it should
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instead generate a byte code expression as that would work better
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with things like Dwarf2's CFI. */
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if (DEPRECATED_FP_REGNUM >= 0 && DEPRECATED_FP_REGNUM < NUM_REGS)
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*frame_regnum = DEPRECATED_FP_REGNUM;
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else if (SP_REGNUM >= 0 && SP_REGNUM < NUM_REGS)
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*frame_regnum = SP_REGNUM;
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else
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/* Should this be an internal error? I guess so, it is reflecting
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an architectural limitation in the current design. */
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internal_error (__FILE__, __LINE__, "No virtual frame pointer available");
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*frame_offset = 0;
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}
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/* Assume the world is sane, every register's virtual and real size
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is identical. */
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int
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generic_register_size (int regnum)
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{
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gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS);
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if (gdbarch_register_type_p (current_gdbarch))
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return TYPE_LENGTH (gdbarch_register_type (current_gdbarch, regnum));
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else
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/* FIXME: cagney/2003-03-01: Once all architectures implement
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gdbarch_register_type(), this entire function can go away. It
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is made obsolete by register_size(). */
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return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum)); /* OK */
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}
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/* Assume all registers are adjacent. */
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int
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generic_register_byte (int regnum)
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{
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int byte;
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int i;
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gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS);
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byte = 0;
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for (i = 0; i < regnum; i++)
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{
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byte += generic_register_size (i);
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}
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return byte;
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}
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int
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legacy_pc_in_sigtramp (CORE_ADDR pc, char *name)
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{
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#if !defined (IN_SIGTRAMP)
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if (SIGTRAMP_START_P ())
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return (pc) >= SIGTRAMP_START (pc) && (pc) < SIGTRAMP_END (pc);
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else
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return name && strcmp ("_sigtramp", name) == 0;
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#else
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return IN_SIGTRAMP (pc, name);
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#endif
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}
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int
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legacy_convert_register_p (int regnum, struct type *type)
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{
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return DEPRECATED_REGISTER_CONVERTIBLE (regnum);
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}
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void
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legacy_register_to_value (struct frame_info *frame, int regnum,
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struct type *type, void *to)
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{
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char from[MAX_REGISTER_SIZE];
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frame_read_register (frame, regnum, from);
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DEPRECATED_REGISTER_CONVERT_TO_VIRTUAL (regnum, type, from, to);
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}
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void
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legacy_value_to_register (struct frame_info *frame, int regnum,
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struct type *type, const void *tmp)
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{
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char to[MAX_REGISTER_SIZE];
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char *from = alloca (TYPE_LENGTH (type));
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memcpy (from, from, TYPE_LENGTH (type));
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DEPRECATED_REGISTER_CONVERT_TO_RAW (type, regnum, from, to);
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put_frame_register (frame, regnum, to);
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}
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int
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default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type)
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{
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if (DEPRECATED_REG_STRUCT_HAS_ADDR_P ()
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&& DEPRECATED_REG_STRUCT_HAS_ADDR (processing_gcc_compilation, type))
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{
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CHECK_TYPEDEF (type);
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return (TYPE_CODE (type) == TYPE_CODE_STRUCT
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|| TYPE_CODE (type) == TYPE_CODE_UNION
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|| TYPE_CODE (type) == TYPE_CODE_SET
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|| TYPE_CODE (type) == TYPE_CODE_BITSTRING);
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}
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return 0;
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}
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/* Functions to manipulate the endianness of the target. */
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/* ``target_byte_order'' is only used when non- multi-arch.
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Multi-arch targets obtain the current byte order using the
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TARGET_BYTE_ORDER gdbarch method.
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The choice of initial value is entirely arbitrary. During startup,
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the function initialize_current_architecture() updates this value
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based on default byte-order information extracted from BFD. */
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int target_byte_order = BFD_ENDIAN_BIG;
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int target_byte_order_auto = 1;
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static const char endian_big[] = "big";
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static const char endian_little[] = "little";
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static const char endian_auto[] = "auto";
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static const char *endian_enum[] =
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{
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endian_big,
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endian_little,
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endian_auto,
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NULL,
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};
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static const char *set_endian_string;
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/* Called by ``show endian''. */
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static void
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show_endian (char *args, int from_tty)
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{
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if (TARGET_BYTE_ORDER_AUTO)
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printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n",
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(TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little"));
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else
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printf_unfiltered ("The target is assumed to be %s endian\n",
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(TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little"));
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}
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static void
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set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c)
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{
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if (set_endian_string == endian_auto)
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{
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target_byte_order_auto = 1;
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}
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else if (set_endian_string == endian_little)
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{
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struct gdbarch_info info;
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target_byte_order_auto = 0;
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gdbarch_info_init (&info);
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info.byte_order = BFD_ENDIAN_LITTLE;
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if (! gdbarch_update_p (info))
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printf_unfiltered ("Little endian target not supported by GDB\n");
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}
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else if (set_endian_string == endian_big)
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{
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struct gdbarch_info info;
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target_byte_order_auto = 0;
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gdbarch_info_init (&info);
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info.byte_order = BFD_ENDIAN_BIG;
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if (! gdbarch_update_p (info))
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printf_unfiltered ("Big endian target not supported by GDB\n");
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}
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else
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internal_error (__FILE__, __LINE__,
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"set_endian: bad value");
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show_endian (NULL, from_tty);
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}
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/* Functions to manipulate the architecture of the target */
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enum set_arch { set_arch_auto, set_arch_manual };
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int target_architecture_auto = 1;
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const char *set_architecture_string;
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/* Called if the user enters ``show architecture'' without an
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argument. */
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static void
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show_architecture (char *args, int from_tty)
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{
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const char *arch;
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arch = TARGET_ARCHITECTURE->printable_name;
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if (target_architecture_auto)
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printf_filtered ("The target architecture is set automatically (currently %s)\n", arch);
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else
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printf_filtered ("The target architecture is assumed to be %s\n", arch);
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}
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/* Called if the user enters ``set architecture'' with or without an
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argument. */
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static void
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set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c)
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{
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if (strcmp (set_architecture_string, "auto") == 0)
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{
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target_architecture_auto = 1;
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}
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else
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{
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struct gdbarch_info info;
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gdbarch_info_init (&info);
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info.bfd_arch_info = bfd_scan_arch (set_architecture_string);
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if (info.bfd_arch_info == NULL)
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internal_error (__FILE__, __LINE__,
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"set_architecture: bfd_scan_arch failed");
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if (gdbarch_update_p (info))
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target_architecture_auto = 0;
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else
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printf_unfiltered ("Architecture `%s' not recognized.\n",
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set_architecture_string);
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}
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show_architecture (NULL, from_tty);
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}
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/* Set the dynamic target-system-dependent parameters (architecture,
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byte-order) using information found in the BFD */
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void
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set_gdbarch_from_file (bfd *abfd)
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{
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struct gdbarch_info info;
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gdbarch_info_init (&info);
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info.abfd = abfd;
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if (! gdbarch_update_p (info))
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error ("Architecture of file not recognized.\n");
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}
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/* Initialize the current architecture. Update the ``set
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architecture'' command so that it specifies a list of valid
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architectures. */
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#ifdef DEFAULT_BFD_ARCH
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extern const bfd_arch_info_type DEFAULT_BFD_ARCH;
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static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH;
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#else
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static const bfd_arch_info_type *default_bfd_arch;
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#endif
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#ifdef DEFAULT_BFD_VEC
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extern const bfd_target DEFAULT_BFD_VEC;
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static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC;
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#else
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static const bfd_target *default_bfd_vec;
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#endif
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void
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initialize_current_architecture (void)
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{
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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 (! 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. */
|
||
{
|
||
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;
|
||
info->osabi = GDB_OSABI_UNINITIALIZED;
|
||
}
|
||
|
||
/* */
|
||
|
||
extern initialize_file_ftype _initialize_gdbarch_utils; /* -Wmissing-prototypes */
|
||
|
||
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);
|
||
}
|