gdb/arch-utils.h

   1 /* Dynamic architecture support for GDB, the GNU debugger.
   2
   3    Copyright 1998, 1999, 2000, 2002 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #ifndef GDBARCH_UTILS_H
  23 #define GDBARCH_UTILS_H
  24
  25 /* gdbarch trace variable */
  26 extern int gdbarch_debug;
  27
  28 /* Fallback for register convertible. */
  29 extern gdbarch_register_convertible_ftype generic_register_convertible_not;
  30
  31 extern CORE_ADDR generic_cannot_extract_struct_value_address (char *dummy);
  32
  33 /* Helper function for targets that don't know how my arguments are
  34    being passed */
  35 extern gdbarch_frame_num_args_ftype frame_num_args_unknown;
  36
  37 /* Implementation of breakpoint from PC using any of the deprecated
  38    macros BREAKPOINT, LITTLE_BREAKPOINT, BIG_BREAPOINT.  For legacy
  39    targets that don't yet implement their own breakpoint_from_pc(). */
  40 extern gdbarch_breakpoint_from_pc_ftype legacy_breakpoint_from_pc;
  41
  42 /* Frameless functions not identifable. */
  43 extern gdbarch_frameless_function_invocation_ftype generic_frameless_function_invocation_not;
  44
  45 /* Only structures, unions, and arrays are returned using the struct
  46    convention.  Note that arrays are never passed by value in the C
  47    language family, so that case is irrelevant for C.  */
  48 extern gdbarch_return_value_on_stack_ftype generic_return_value_on_stack_not;
  49
  50 /* Map onto old REGISTER_NAMES. */
  51 extern char *legacy_register_name (int i);
  52
  53 /* Accessor for old global function pointer for disassembly. */
  54 extern int legacy_print_insn (bfd_vma vma, disassemble_info *info);
  55
  56 /* Backward compatible call_dummy_words. */
  57 extern LONGEST legacy_call_dummy_words[];
  58 extern int legacy_sizeof_call_dummy_words;
  59
  60 /* Typical remote_translate_xfer_address */
  61 extern gdbarch_remote_translate_xfer_address_ftype generic_remote_translate_xfer_address;
  62
  63 /* Generic implementation of prologue_frameless_p.  Just calls
  64    SKIP_PROLOG and checks the return value to see if it actually
  65    changed. */
  66 extern gdbarch_prologue_frameless_p_ftype generic_prologue_frameless_p;
  67
  68 /* The only possible cases for inner_than. */
  69 extern int core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs);
  70 extern int core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs);
  71
  72 /* Floating point values. */
  73 extern const struct floatformat *default_float_format (struct gdbarch *gdbarch);
  74 extern const struct floatformat *default_double_format (struct gdbarch *gdbarch);
  75
  76 /* Helper function for targets that don't know how my arguments are
  77    being passed */
  78 extern int frame_num_args_unknown (struct frame_info *fi);
  79
  80
  81 /* The following DEPRECATED interfaces are for pre- multi-arch legacy
  82    targets. */
  83
  84 /* DEPRECATED pre- multi-arch interface.  Explicitly set the dynamic
  85    target-system-dependent parameters based on bfd_architecture and
  86    machine.  This function is deprecated, use
  87    set_gdbarch_from_arch_machine(). */
  88
  89 extern void set_architecture_from_arch_mach (enum bfd_architecture, unsigned long);
  90
  91 /* DEPRECATED pre- multi-arch interface.  Notify the target dependent
  92    backend of a change to the selected architecture. A zero return
  93    status indicates that the target did not like the change. */
  94
  95 extern int (*target_architecture_hook) (const struct bfd_arch_info *);
  96
  97
  98 /* Default raw->sim register re-numbering - does nothing. */
  99
 100 extern int default_register_sim_regno (int reg_nr);
 101
 102 /* Identity function on a CORE_ADDR.  Just returns its parameter.  */
 103
 104 extern CORE_ADDR core_addr_identity (CORE_ADDR addr);
 105
 106 /* No-op conversion of reg to regnum. */
 107
 108 extern int no_op_reg_to_regnum (int reg);
 109
 110 /* Default frame_args_address and frame_locals_address.  */
 111
 112 extern CORE_ADDR default_frame_address (struct frame_info *);
 113
 114 /* Default prepare_to_procced. */
 115
 116 extern int default_prepare_to_proceed (int select_it);
 117
 118 extern int generic_prepare_to_proceed (int select_it);
 119
 120 /* Versions of init_frame_pc().  Do nothing; do the default. */
 121
 122 void init_frame_pc_noop (int fromleaf, struct frame_info *prev);
 123
 124 void init_frame_pc_default (int fromleaf, struct frame_info *prev);
 125
 126 /* Do nothing version of elf_make_msymbol_special. */
 127
 128 void default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym);
 129
 130 /* Do nothing version of coff_make_msymbol_special. */
 131
 132 void default_coff_make_msymbol_special (int val, struct minimal_symbol *msym);
 133
 134 /* Version of cannot_fetch_register() / cannot_store_register() that
 135    always fails. */
 136
 137 int cannot_register_not (int regnum);
 138
 139 /* Legacy version of target_virtual_frame_pointer().  Assumes that
 140    there is an FP_REGNUM and that it is the same, cooked or raw.  */
 141
 142 extern gdbarch_virtual_frame_pointer_ftype legacy_virtual_frame_pointer;
 143
 144 extern CORE_ADDR generic_skip_trampoline_code (CORE_ADDR pc);
 145
 146 extern int generic_in_solib_call_trampoline (CORE_ADDR pc, char *name);
 147
 148 extern int generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc);
 149
 150 extern void default_print_float_info (void);
 151
 152 /* Assume that the world is sane, a registers raw and virtual size
 153    both match its type.  */
 154
 155 extern int generic_register_size (int regnum);
 156
 157 /* Prop up old targets that use various IN_SIGTRAMP() macros.  */
 158 extern int legacy_pc_in_sigtramp (CORE_ADDR pc, char *name);
 159
 160 /* Initialize a ``struct info''.  Can't use memset(0) since some
 161    default values are not zero.  */
 162 extern void gdbarch_info_init (struct gdbarch_info *info);
 163
 164 #endif