1 /* Dynamic architecture support for GDB, the GNU debugger. 2 3 Copyright 1998, 1999, 2000, 2002, 2003, 2004 Free Software 4 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 2 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, write to the Free Software 20 Foundation, Inc., 59 Temple Place - Suite 330, 21 Boston, MA 02111-1307, USA. */ 22 23 #ifndef GDBARCH_UTILS_H 24 #define GDBARCH_UTILS_H 25 26 struct gdbarch; 27 struct frame_info; 28 struct minimal_symbol; 29 struct type; 30 struct gdbarch_info; 31 32 /* gdbarch trace variable */ 33 extern int gdbarch_debug; 34 35 /* An implementation of return_value that props up architectures still 36 using USE_STRUCT_RETURN, EXTRACT_RETURN_VALUE and 37 STORE_RETURN_VALUE. See also the hacks in "stack.c". */ 38 enum return_value_convention legacy_return_value (struct gdbarch *gdbarch, 39 struct type *valtype, 40 struct regcache *regcache, 41 gdb_byte *readbuf, 42 const gdb_byte *writebuf); 43 44 /* Implementation of extract return value that grubs around in the 45 register cache. */ 46 extern gdbarch_extract_return_value_ftype legacy_extract_return_value; 47 48 /* Implementation of store return value that grubs the register cache. */ 49 extern gdbarch_store_return_value_ftype legacy_store_return_value; 50 51 /* To return any structure or union type by value, store it at the 52 address passed as an invisible first argument to the function. */ 53 extern gdbarch_deprecated_use_struct_convention_ftype always_use_struct_convention; 54 55 /* Typical remote_translate_xfer_address */ 56 extern gdbarch_remote_translate_xfer_address_ftype generic_remote_translate_xfer_address; 57 58 /* The only possible cases for inner_than. */ 59 extern int core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs); 60 extern int core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs); 61 62 /* Floating point values. */ 63 extern const struct floatformat *default_float_format (struct gdbarch *gdbarch); 64 extern const struct floatformat *default_double_format (struct gdbarch *gdbarch); 65 66 /* Identity functions on a CORE_ADDR. Just return the "addr". */ 67 68 extern CORE_ADDR core_addr_identity (CORE_ADDR addr); 69 extern gdbarch_convert_from_func_ptr_addr_ftype convert_from_func_ptr_addr_identity; 70 71 /* No-op conversion of reg to regnum. */ 72 73 extern int no_op_reg_to_regnum (int reg); 74 75 /* Do nothing version of elf_make_msymbol_special. */ 76 77 void default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym); 78 79 /* Do nothing version of coff_make_msymbol_special. */ 80 81 void default_coff_make_msymbol_special (int val, struct minimal_symbol *msym); 82 83 /* Version of cannot_fetch_register() / cannot_store_register() that 84 always fails. */ 85 86 int cannot_register_not (int regnum); 87 88 /* Legacy version of target_virtual_frame_pointer(). Assumes that 89 there is an DEPRECATED_FP_REGNUM and that it is the same, cooked or 90 raw. */ 91 92 extern gdbarch_virtual_frame_pointer_ftype legacy_virtual_frame_pointer; 93 94 extern CORE_ADDR generic_skip_trampoline_code (CORE_ADDR pc); 95 96 extern CORE_ADDR generic_skip_solib_resolver (struct gdbarch *gdbarch, 97 CORE_ADDR pc); 98 99 extern int generic_in_solib_return_trampoline (CORE_ADDR pc, char *name); 100 101 extern int generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc); 102 103 /* Assume that the world is sane, a registers raw and virtual size 104 both match its type. */ 105 106 extern int generic_register_size (int regnum); 107 108 /* Assume that the world is sane, the registers are all adjacent. */ 109 extern int generic_register_byte (int regnum); 110 111 /* Prop up old targets that use various sigtramp macros. */ 112 extern int legacy_pc_in_sigtramp (CORE_ADDR pc, char *name); 113 114 /* By default, registers are not convertible. */ 115 extern int generic_convert_register_p (int regnum, struct type *type); 116 117 extern int default_stabs_argument_has_addr (struct gdbarch *gdbarch, 118 struct type *type); 119 120 extern int generic_instruction_nullified (struct gdbarch *gdbarch, 121 struct regcache *regcache); 122 123 /* For compatibility with older architectures, returns 124 (LEGACY_SIM_REGNO_IGNORE) when the register doesn't have a valid 125 name. */ 126 127 extern int legacy_register_sim_regno (int regnum); 128 129 /* Return the selected byte order, or BFD_ENDIAN_UNKNOWN if no byte 130 order was explicitly selected. */ 131 extern enum bfd_endian selected_byte_order (void); 132 133 /* Return the selected architecture's name, or NULL if no architecture 134 was explicitly selected. */ 135 extern const char *selected_architecture_name (void); 136 137 /* Initialize a ``struct info''. Can't use memset(0) since some 138 default values are not zero. "fill" takes all available 139 information and fills in any unspecified fields. */ 140 141 extern void gdbarch_info_init (struct gdbarch_info *info); 142 extern void gdbarch_info_fill (struct gdbarch *gdbarch, 143 struct gdbarch_info *info); 144 145 /* Similar to init, but this time fill in the blanks. Information is 146 obtained from the specified architecture, global "set ..." options, 147 and explicitly initialized INFO fields. */ 148 extern void gdbarch_info_fill (struct gdbarch *gdbarch, 149 struct gdbarch_info *info); 150 151 /* Return the architecture for ABFD. If no suitable architecture 152 could be find, return NULL. */ 153 154 extern struct gdbarch *gdbarch_from_bfd (bfd *abfd); 155 156 #endif 157