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 /* Implementation of extract return value that grubs around in the
  43    register cache.  */
  44 extern gdbarch_extract_return_value_ftype legacy_extract_return_value;
  45
  46 /* Implementation of store return value that grubs the register cache.  */
  47 extern gdbarch_store_return_value_ftype legacy_store_return_value;
  48
  49 /* Frameless functions not identifable. */
  50 extern gdbarch_frameless_function_invocation_ftype generic_frameless_function_invocation_not;
  51
  52 /* Only structures, unions, and arrays are returned using the struct
  53    convention.  Note that arrays are never passed by value in the C
  54    language family, so that case is irrelevant for C.  */
  55 extern gdbarch_return_value_on_stack_ftype generic_return_value_on_stack_not;
  56
  57 /* Map onto old REGISTER_NAMES. */
  58 extern const char *legacy_register_name (int i);
  59
  60 /* Accessor for old global function pointer for disassembly. */
  61 extern int legacy_print_insn (bfd_vma vma, disassemble_info *info);
  62
  63 /* Backward compatible call_dummy_words. */
  64 extern LONGEST legacy_call_dummy_words[];
  65 extern int legacy_sizeof_call_dummy_words;
  66
  67 /* Typical remote_translate_xfer_address */
  68 extern gdbarch_remote_translate_xfer_address_ftype generic_remote_translate_xfer_address;
  69
  70 /* Generic implementation of prologue_frameless_p.  Just calls
  71    SKIP_PROLOG and checks the return value to see if it actually
  72    changed. */
  73 extern gdbarch_prologue_frameless_p_ftype generic_prologue_frameless_p;
  74
  75 /* The only possible cases for inner_than. */
  76 extern int core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs);
  77 extern int core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs);
  78
  79 /* Floating point values. */
  80 extern const struct floatformat *default_float_format (struct gdbarch *gdbarch);
  81 extern const struct floatformat *default_double_format (struct gdbarch *gdbarch);
  82
  83 /* Helper function for targets that don't know how my arguments are
  84    being passed */
  85 extern int frame_num_args_unknown (struct frame_info *fi);
  86
  87
  88 /* The following DEPRECATED interfaces are for pre- multi-arch legacy
  89    targets. */
  90
  91 /* DEPRECATED pre- multi-arch interface.  Explicitly set the dynamic
  92    target-system-dependent parameters based on bfd_architecture and
  93    machine.  This function is deprecated, use
  94    set_gdbarch_from_arch_machine(). */
  95
  96 extern void set_architecture_from_arch_mach (enum bfd_architecture, unsigned long);
  97
  98 /* DEPRECATED pre- multi-arch interface.  Notify the target dependent
  99    backend of a change to the selected architecture. A zero return
 100    status indicates that the target did not like the change. */
 101
 102 extern int (*target_architecture_hook) (const struct bfd_arch_info *);
 103
 104 /* Identity function on a CORE_ADDR.  Just returns its parameter.  */
 105
 106 extern CORE_ADDR core_addr_identity (CORE_ADDR addr);
 107
 108 /* No-op conversion of reg to regnum. */
 109
 110 extern int no_op_reg_to_regnum (int reg);
 111
 112 /* Default frame_args_address and frame_locals_address.  */
 113
 114 extern CORE_ADDR default_frame_address (struct frame_info *);
 115
 116 /* Default prepare_to_procced. */
 117
 118 extern int default_prepare_to_proceed (int select_it);
 119
 120 extern int generic_prepare_to_proceed (int select_it);
 121
 122 /* Versions of init_frame_pc().  Do nothing; do the default. */
 123
 124 void init_frame_pc_noop (int fromleaf, struct frame_info *prev);
 125
 126 void init_frame_pc_default (int fromleaf, struct frame_info *prev);
 127
 128 /* Do nothing version of elf_make_msymbol_special. */
 129
 130 void default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym);
 131
 132 /* Do nothing version of coff_make_msymbol_special. */
 133
 134 void default_coff_make_msymbol_special (int val, struct minimal_symbol *msym);
 135
 136 /* Version of cannot_fetch_register() / cannot_store_register() that
 137    always fails. */
 138
 139 int cannot_register_not (int regnum);
 140
 141 /* Legacy version of target_virtual_frame_pointer().  Assumes that
 142    there is an FP_REGNUM and that it is the same, cooked or raw.  */
 143
 144 extern gdbarch_virtual_frame_pointer_ftype legacy_virtual_frame_pointer;
 145
 146 extern CORE_ADDR generic_skip_trampoline_code (CORE_ADDR pc);
 147
 148 extern int generic_in_solib_call_trampoline (CORE_ADDR pc, char *name);
 149
 150 extern int generic_in_solib_return_trampoline (CORE_ADDR pc, char *name);
 151
 152 extern int generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc);
 153
 154 /* Assume that the world is sane, a registers raw and virtual size
 155    both match its type.  */
 156
 157 extern int generic_register_size (int regnum);
 158
 159 /* Assume that the world is sane, the registers are all adjacent.  */
 160 extern int generic_register_byte (int regnum);
 161
 162 /* Prop up old targets that use various IN_SIGTRAMP() macros.  */
 163 extern int legacy_pc_in_sigtramp (CORE_ADDR pc, char *name);
 164
 165 /* The orginal register_convert*() functions were overloaded.  They
 166    were used to both: convert between virtual and raw register formats
 167    (something that is discouraged); and to convert a register to the
 168    type of a corresponding variable.  These legacy functions preserve
 169    that overloaded behavour in existing targets.  */
 170 extern int legacy_convert_register_p (int regnum);
 171 extern void legacy_register_to_value (int regnum, struct type *type, char *from, char *to);
 172 extern void legacy_value_to_register (struct type *type, int regnum, char *from, char *to);
 173
 174 /* For compatibility with older architectures, returns
 175    (LEGACY_SIM_REGNO_IGNORE) when the register doesn't have a valid
 176    name.  */
 177
 178 extern int legacy_register_sim_regno (int regnum);
 179
 180 /* Initialize a ``struct info''.  Can't use memset(0) since some
 181    default values are not zero.  */
 182 extern void gdbarch_info_init (struct gdbarch_info *info);
 183
 184 #endif