gdb/arch-utils.c

   1 /* Dynamic architecture support for GDB, the GNU debugger.
   2    Copyright 1998-1999, Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "defs.h"
  22
  23 #if GDB_MULTI_ARCH
  24 #include "gdbcmd.h"
  25 #include "inferior.h"           /* enum CALL_DUMMY_LOCATION et.al. */
  26 #else
  27 /* Just include everything in sight so that the every old definition
  28    of macro is visible. */
  29 #include "gdb_string.h"
  30 #include <ctype.h>
  31 #include "symtab.h"
  32 #include "frame.h"
  33 #include "inferior.h"
  34 #include "breakpoint.h"
  35 #include "gdb_wait.h"
  36 #include "gdbcore.h"
  37 #include "gdbcmd.h"
  38 #include "target.h"
  39 #include "gdbthread.h"
  40 #include "annotate.h"
  41 #include "symfile.h"            /* for overlay functions */
  42 #endif
  43
  44 /* Convenience macro for allocting typesafe memory. */
  45
  46 #ifndef XMALLOC
  47 #define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE))
  48 #endif
  49
  50
  51 /* Use the program counter to determine the contents and size
  52    of a breakpoint instruction.  If no target-dependent macro
  53    BREAKPOINT_FROM_PC has been defined to implement this function,
  54    assume that the breakpoint doesn't depend on the PC, and
  55    use the values of the BIG_BREAKPOINT and LITTLE_BREAKPOINT macros.
  56    Return a pointer to a string of bytes that encode a breakpoint
  57    instruction, stores the length of the string to *lenptr,
  58    and optionally adjust the pc to point to the correct memory location
  59    for inserting the breakpoint.  */
  60
  61 unsigned char *
  62 legacy_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr)
  63 {
  64   /* {BIG_,LITTLE_}BREAKPOINT is the sequence of bytes we insert for a
  65      breakpoint.  On some machines, breakpoints are handled by the
  66      target environment and we don't have to worry about them here.  */
  67 #ifdef BIG_BREAKPOINT
  68   if (TARGET_BYTE_ORDER == BIG_ENDIAN)
  69     {
  70       static unsigned char big_break_insn[] = BIG_BREAKPOINT;
  71       *lenptr = sizeof (big_break_insn);
  72       return big_break_insn;
  73     }
  74 #endif
  75 #ifdef LITTLE_BREAKPOINT
  76   if (TARGET_BYTE_ORDER != BIG_ENDIAN)
  77     {
  78       static unsigned char little_break_insn[] = LITTLE_BREAKPOINT;
  79       *lenptr = sizeof (little_break_insn);
  80       return little_break_insn;
  81     }
  82 #endif
  83 #ifdef BREAKPOINT
  84   {
  85     static unsigned char break_insn[] = BREAKPOINT;
  86     *lenptr = sizeof (break_insn);
  87     return break_insn;
  88   }
  89 #endif
  90   *lenptr = 0;
  91   return NULL;
  92 }
  93
  94 int
  95 generic_frameless_function_invocation_not (struct frame_info *fi)
  96 {
  97   return 0;
  98 }
  99
 100 char *
 101 legacy_register_name (int i)
 102 {
 103 #ifdef REGISTER_NAMES
 104   static char *names[] = REGISTER_NAMES;
 105   if (i < 0 || i >= (sizeof (names) / sizeof (*names)))
 106     return NULL;
 107   else
 108     return names[i];
 109 #else
 110   internal_error ("legacy_register_name: called.");
 111   return NULL;
 112 #endif
 113 }
 114
 115 #if defined (CALL_DUMMY)
 116 LONGEST legacy_call_dummy_words[] = CALL_DUMMY;
 117 #else
 118 LONGEST legacy_call_dummy_words[1];
 119 #endif
 120 int legacy_sizeof_call_dummy_words = sizeof (legacy_call_dummy_words);
 121
 122 void
 123 generic_remote_translate_xfer_address (CORE_ADDR gdb_addr, int gdb_len,
 124                                        CORE_ADDR * rem_addr, int *rem_len)
 125 {
 126   *rem_addr = gdb_addr;
 127   *rem_len = gdb_len;
 128 }
 129
 130 /* */
 131
 132 extern initialize_file_ftype __initialize_gdbarch_utils;
 133
 134 void
 135 __initialize_gdbarch_utils (void)
 136 {
 137 }