gdb/arch-utils.h

   1 /* Dynamic architecture support for GDB, the GNU debugger.
   2
   3    Copyright (C) 1998, 1999, 2000, 2002, 2003, 2004, 2007
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef GDBARCH_UTILS_H
  22 #define GDBARCH_UTILS_H
  23
  24 struct gdbarch;
  25 struct frame_info;
  26 struct minimal_symbol;
  27 struct type;
  28 struct gdbarch_info;
  29
  30 /* gdbarch trace variable */
  31 extern int gdbarch_debug;
  32
  33 /* An implementation of return_value that props up architectures still
  34    using USE_STRUCT_RETURN, gdbarch_extract_return_value and
  35    store_return_value.  See also the hacks in "stack.c".  */
  36 enum return_value_convention legacy_return_value (struct gdbarch *gdbarch,
  37                                                   struct type *valtype,
  38                                                   struct regcache *regcache,
  39                                                   gdb_byte *readbuf,
  40                                                   const gdb_byte *writebuf);
  41
  42 /* To return any structure or union type by value, store it at the
  43    address passed as an invisible first argument to the function.  */
  44 extern gdbarch_deprecated_use_struct_convention_ftype always_use_struct_convention;
  45
  46 /* The only possible cases for inner_than. */
  47 extern int core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs);
  48 extern int core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs);
  49
  50 /* Identity functions on a CORE_ADDR.  Just return the "addr".  */
  51
  52 extern CORE_ADDR core_addr_identity (CORE_ADDR addr);
  53 extern gdbarch_convert_from_func_ptr_addr_ftype convert_from_func_ptr_addr_identity;
  54
  55 /* No-op conversion of reg to regnum. */
  56
  57 extern int no_op_reg_to_regnum (int reg);
  58
  59 /* Do nothing version of elf_make_msymbol_special. */
  60
  61 void default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym);
  62
  63 /* Do nothing version of coff_make_msymbol_special. */
  64
  65 void default_coff_make_msymbol_special (int val, struct minimal_symbol *msym);
  66
  67 /* Version of cannot_fetch_register() / cannot_store_register() that
  68    always fails. */
  69
  70 int cannot_register_not (int regnum);
  71
  72 /* Legacy version of target_virtual_frame_pointer().  Assumes that
  73    there is an gdbarch_deprecated_fp_regnum and that it is the same, cooked or
  74    raw.  */
  75
  76 extern gdbarch_virtual_frame_pointer_ftype legacy_virtual_frame_pointer;
  77
  78 extern CORE_ADDR generic_skip_trampoline_code (struct frame_info *frame,
  79                                                CORE_ADDR pc);
  80
  81 extern CORE_ADDR generic_skip_solib_resolver (struct gdbarch *gdbarch,
  82                                               CORE_ADDR pc);
  83
  84 extern int generic_in_solib_return_trampoline (CORE_ADDR pc, char *name);
  85
  86 extern int generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc);
  87
  88 /* By default, registers are not convertible.  */
  89 extern int generic_convert_register_p (int regnum, struct type *type);
  90
  91 extern int default_stabs_argument_has_addr (struct gdbarch *gdbarch,
  92                                             struct type *type);
  93
  94 extern int generic_instruction_nullified (struct gdbarch *gdbarch,
  95                                           struct regcache *regcache);
  96
  97 int default_remote_register_number (struct gdbarch *gdbarch,
  98                                     int regno);
  99
 100 /* For compatibility with older architectures, returns
 101    (LEGACY_SIM_REGNO_IGNORE) when the register doesn't have a valid
 102    name.  */
 103
 104 extern int legacy_register_sim_regno (int regnum);
 105
 106 /* Return the selected byte order, or BFD_ENDIAN_UNKNOWN if no byte
 107    order was explicitly selected.  */
 108 extern enum bfd_endian selected_byte_order (void);
 109
 110 /* Return the selected architecture's name, or NULL if no architecture
 111    was explicitly selected.  */
 112 extern const char *selected_architecture_name (void);
 113
 114 /* Initialize a ``struct info''.  Can't use memset(0) since some
 115    default values are not zero.  "fill" takes all available
 116    information and fills in any unspecified fields.  */
 117
 118 extern void gdbarch_info_init (struct gdbarch_info *info);
 119
 120 /* Similar to init, but this time fill in the blanks.  Information is
 121    obtained from the global "set ..." options and explicitly
 122    initialized INFO fields.  */
 123 extern void gdbarch_info_fill (struct gdbarch_info *info);
 124
 125 /* Return the architecture for ABFD.  If no suitable architecture
 126    could be find, return NULL.  */
 127
 128 extern struct gdbarch *gdbarch_from_bfd (bfd *abfd);
 129
 130 #endif