c347ee3e51
* arch-utils.c (default_frame_address): New function. Default
implementation of frame_args_address and frame_locals_address.
* arch-utils.h (default_frame_address): Export.
* d10v-tdep.c (d10v_gdbarch_init): Use default_frame_address.
(d10v_frame_args_address, d10v_frame_locals_address): Delete.
* sh-tdep.c (sh_gdbarch_init): Use default_frame_address.
(sh_frame_args_address, sh_frame_locals_address): Delete.
* sparc-tdep.c (sparc_gdbarch_init): Use default_frame_address.
(sparc_frame_address): Delete.
725 lines
18 KiB
C
725 lines
18 KiB
C
/* Dynamic architecture support for GDB, the GNU debugger.
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Copyright 1998-1999, Free Software Foundation, 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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#if GDB_MULTI_ARCH
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#include "gdbcmd.h"
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#include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */
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#else
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/* Just include everything in sight so that the every old definition
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of macro is visible. */
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#include "gdb_string.h"
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#include <ctype.h>
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#include "symtab.h"
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#include "frame.h"
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#include "inferior.h"
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#include "breakpoint.h"
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#include "gdb_wait.h"
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#include "gdbcore.h"
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#include "gdbcmd.h"
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#include "target.h"
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#include "gdbthread.h"
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#include "annotate.h"
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#include "symfile.h" /* for overlay functions */
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#endif
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#include "version.h"
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#include "floatformat.h"
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/* Convenience macro for allocting typesafe memory. */
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#ifndef XMALLOC
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#define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE))
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#endif
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/* Use the program counter to determine the contents and size
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of a breakpoint instruction. If no target-dependent macro
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BREAKPOINT_FROM_PC has been defined to implement this function,
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assume that the breakpoint doesn't depend on the PC, and
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use the values of the BIG_BREAKPOINT and LITTLE_BREAKPOINT macros.
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Return a pointer to a string of bytes that encode a breakpoint
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instruction, stores the length of the string to *lenptr,
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and optionally adjust the pc to point to the correct memory location
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for inserting the breakpoint. */
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unsigned char *
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legacy_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr)
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{
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/* {BIG_,LITTLE_}BREAKPOINT is the sequence of bytes we insert for a
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breakpoint. On some machines, breakpoints are handled by the
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target environment and we don't have to worry about them here. */
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#ifdef BIG_BREAKPOINT
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if (TARGET_BYTE_ORDER == BIG_ENDIAN)
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{
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static unsigned char big_break_insn[] = BIG_BREAKPOINT;
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*lenptr = sizeof (big_break_insn);
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return big_break_insn;
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}
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#endif
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#ifdef LITTLE_BREAKPOINT
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if (TARGET_BYTE_ORDER != BIG_ENDIAN)
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{
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static unsigned char little_break_insn[] = LITTLE_BREAKPOINT;
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*lenptr = sizeof (little_break_insn);
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return little_break_insn;
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}
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#endif
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#ifdef BREAKPOINT
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{
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static unsigned char break_insn[] = BREAKPOINT;
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*lenptr = sizeof (break_insn);
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return break_insn;
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}
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#endif
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*lenptr = 0;
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return NULL;
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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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char *
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legacy_register_name (int i)
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{
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#ifdef REGISTER_NAMES
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static char *names[] = REGISTER_NAMES;
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if (i < 0 || i >= (sizeof (names) / sizeof (*names)))
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return NULL;
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else
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return names[i];
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#else
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internal_error ("legacy_register_name: called.");
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return NULL;
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#endif
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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 (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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#ifdef SKIP_PROLOGUE_FRAMELESS_P
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return ip == SKIP_PROLOGUE_FRAMELESS_P (ip);
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#else
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return ip == SKIP_PROLOGUE (ip);
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#endif
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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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#if GDB_MULTI_ARCH
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int byte_order = gdbarch_byte_order (gdbarch);
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#else
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int byte_order = TARGET_BYTE_ORDER;
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#endif
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switch (byte_order)
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{
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case BIG_ENDIAN:
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return &floatformat_ieee_single_big;
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case LITTLE_ENDIAN:
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return &floatformat_ieee_single_little;
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default:
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internal_error ("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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#if GDB_MULTI_ARCH
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int byte_order = gdbarch_byte_order (gdbarch);
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#else
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int byte_order = TARGET_BYTE_ORDER;
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#endif
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switch (byte_order)
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{
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case BIG_ENDIAN:
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return &floatformat_ieee_double_big;
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case LITTLE_ENDIAN:
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return &floatformat_ieee_double_little;
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default:
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internal_error ("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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frame_num_args_unknown (struct frame_info *fi)
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{
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return -1;
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}
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int
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generic_register_convertible_not (int num)
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{
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return 0;
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}
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int
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default_register_sim_regno (int num)
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{
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return num;
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}
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CORE_ADDR
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default_convert_from_func_ptr_addr (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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/* For use by frame_args_address and frame_locals_address. */
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CORE_ADDR
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default_frame_address (struct frame_info *fi)
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{
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return fi->frame;
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}
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/* Functions to manipulate the endianness of the target. */
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#ifdef TARGET_BYTE_ORDER_SELECTABLE
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/* compat - Catch old targets that expect a selectable byte-order to
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default to BIG_ENDIAN */
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#ifndef TARGET_BYTE_ORDER_DEFAULT
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#define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
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#endif
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#endif
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#if !TARGET_BYTE_ORDER_SELECTABLE_P
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#ifndef TARGET_BYTE_ORDER_DEFAULT
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/* compat - Catch old non byte-order selectable targets that do not
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define TARGET_BYTE_ORDER_DEFAULT and instead expect
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TARGET_BYTE_ORDER to be used as the default. For targets that
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defined neither TARGET_BYTE_ORDER nor TARGET_BYTE_ORDER_DEFAULT the
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below will get a strange compiler warning. */
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#define TARGET_BYTE_ORDER_DEFAULT TARGET_BYTE_ORDER
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#endif
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#endif
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#ifndef TARGET_BYTE_ORDER_DEFAULT
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#define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN /* arbitrary */
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#endif
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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
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TARGET_BYTE_ORDER which is controlled by gdbarch.*. */
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int target_byte_order = TARGET_BYTE_ORDER_DEFAULT;
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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 == BIG_ENDIAN ? "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 == BIG_ENDIAN ? "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 (!TARGET_BYTE_ORDER_SELECTABLE_P)
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{
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printf_unfiltered ("Byte order is not selectable.");
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}
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else 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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target_byte_order_auto = 0;
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if (GDB_MULTI_ARCH)
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{
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struct gdbarch_info info;
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memset (&info, 0, sizeof info);
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info.byte_order = LITTLE_ENDIAN;
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if (! gdbarch_update_p (info))
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{
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printf_unfiltered ("Little endian target not supported by GDB\n");
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}
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}
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else
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{
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target_byte_order = LITTLE_ENDIAN;
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}
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}
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else if (set_endian_string == endian_big)
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{
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target_byte_order_auto = 0;
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if (GDB_MULTI_ARCH)
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{
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struct gdbarch_info info;
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memset (&info, 0, sizeof info);
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info.byte_order = BIG_ENDIAN;
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if (! gdbarch_update_p (info))
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{
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printf_unfiltered ("Big endian target not supported by GDB\n");
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}
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}
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else
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{
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target_byte_order = BIG_ENDIAN;
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}
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}
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else
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internal_error ("set_endian: bad value");
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show_endian (NULL, from_tty);
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}
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/* Set the endianness from a BFD. */
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static void
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set_endian_from_file (bfd *abfd)
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{
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if (GDB_MULTI_ARCH)
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internal_error ("set_endian_from_file: not for multi-arch");
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if (TARGET_BYTE_ORDER_SELECTABLE_P)
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{
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int want;
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if (bfd_big_endian (abfd))
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want = BIG_ENDIAN;
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else
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want = LITTLE_ENDIAN;
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if (TARGET_BYTE_ORDER_AUTO)
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target_byte_order = want;
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else if (TARGET_BYTE_ORDER != want)
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warning ("%s endian file does not match %s endian target.",
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want == BIG_ENDIAN ? "big" : "little",
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TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little");
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}
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else
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{
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if (bfd_big_endian (abfd)
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? TARGET_BYTE_ORDER != BIG_ENDIAN
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: TARGET_BYTE_ORDER == BIG_ENDIAN)
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warning ("%s endian file does not match %s endian target.",
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bfd_big_endian (abfd) ? "big" : "little",
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TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little");
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}
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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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/* Old way of changing the current architecture. */
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extern const struct bfd_arch_info bfd_default_arch_struct;
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const struct bfd_arch_info *target_architecture = &bfd_default_arch_struct;
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int (*target_architecture_hook) (const struct bfd_arch_info *ap);
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static int
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arch_ok (const struct bfd_arch_info *arch)
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{
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if (GDB_MULTI_ARCH)
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internal_error ("arch_ok: not multi-arched");
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/* Should be performing the more basic check that the binary is
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compatible with GDB. */
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/* Check with the target that the architecture is valid. */
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return (target_architecture_hook == NULL
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|| target_architecture_hook (arch));
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}
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static void
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set_arch (const struct bfd_arch_info *arch,
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enum set_arch type)
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{
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if (GDB_MULTI_ARCH)
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internal_error ("set_arch: not multi-arched");
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switch (type)
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{
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case set_arch_auto:
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if (!arch_ok (arch))
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warning ("Target may not support %s architecture",
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arch->printable_name);
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target_architecture = arch;
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break;
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case set_arch_manual:
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if (!arch_ok (arch))
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{
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printf_unfiltered ("Target does not support `%s' architecture.\n",
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arch->printable_name);
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}
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else
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{
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target_architecture_auto = 0;
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target_architecture = arch;
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}
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break;
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}
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if (gdbarch_debug)
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gdbarch_dump (current_gdbarch, gdb_stdlog);
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}
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/* Set the architecture from arch/machine (deprecated) */
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void
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set_architecture_from_arch_mach (enum bfd_architecture arch,
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unsigned long mach)
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{
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const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach);
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if (GDB_MULTI_ARCH)
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internal_error ("set_architecture_from_arch_mach: not multi-arched");
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if (wanted != NULL)
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set_arch (wanted, set_arch_manual);
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else
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internal_error ("gdbarch: hardwired architecture/machine not recognized");
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}
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/* Set the architecture from a BFD (deprecated) */
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static void
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set_architecture_from_file (bfd *abfd)
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{
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const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd);
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if (GDB_MULTI_ARCH)
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internal_error ("set_architecture_from_file: not multi-arched");
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if (target_architecture_auto)
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{
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set_arch (wanted, set_arch_auto);
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}
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else if (wanted != target_architecture)
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{
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warning ("%s architecture file may be incompatible with %s target.",
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wanted->printable_name,
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target_architecture->printable_name);
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}
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}
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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 if (GDB_MULTI_ARCH)
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{
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struct gdbarch_info info;
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memset (&info, 0, sizeof 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 ("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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else
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{
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const struct bfd_arch_info *arch
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= bfd_scan_arch (set_architecture_string);
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if (arch == NULL)
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internal_error ("set_architecture: bfd_scan_arch failed");
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set_arch (arch, set_arch_manual);
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}
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show_architecture (NULL, from_tty);
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}
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/* Called if the user enters ``info architecture'' without an argument. */
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static void
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info_architecture (char *args, int from_tty)
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{
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printf_filtered ("Available architectures are:\n");
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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 */
|
|
|
|
void
|
|
set_gdbarch_from_file (bfd *abfd)
|
|
{
|
|
if (GDB_MULTI_ARCH)
|
|
{
|
|
struct gdbarch_info info;
|
|
memset (&info, 0, sizeof 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;
|
|
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)
|
|
{
|
|
if (! gdbarch_update_p (info))
|
|
{
|
|
internal_error ("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);
|
|
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;
|
|
|
|
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);
|
|
}
|