1 /* Dynamic architecture support for GDB, the GNU debugger.
3 Copyright 1998, 1999, 2000, 2002 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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. */
22 #ifndef GDBARCH_UTILS_H
23 #define GDBARCH_UTILS_H
27 struct minimal_symbol
;
31 /* gdbarch trace variable */
32 extern int gdbarch_debug
;
34 /* Fallback for register convertible. */
35 extern gdbarch_register_convertible_ftype generic_register_convertible_not
;
37 extern CORE_ADDR
generic_cannot_extract_struct_value_address (char *dummy
);
39 /* Helper function for targets that don't know how my arguments are
41 extern gdbarch_frame_num_args_ftype frame_num_args_unknown
;
43 /* Implementation of extract return value that grubs around in the
45 extern gdbarch_extract_return_value_ftype legacy_extract_return_value
;
47 /* Implementation of store return value that grubs the register cache. */
48 extern gdbarch_store_return_value_ftype legacy_store_return_value
;
50 /* Frameless functions not identifable. */
51 extern gdbarch_frameless_function_invocation_ftype generic_frameless_function_invocation_not
;
53 /* Only structures, unions, and arrays are returned using the struct
54 convention. Note that arrays are never passed by value in the C
55 language family, so that case is irrelevant for C. */
56 extern gdbarch_return_value_on_stack_ftype generic_return_value_on_stack_not
;
58 /* Map onto old REGISTER_NAMES. */
59 extern const char *legacy_register_name (int i
);
61 /* Accessor for old global function pointer for disassembly. */
62 extern int legacy_print_insn (bfd_vma vma
, disassemble_info
*info
);
64 /* Backward compatible call_dummy_words. */
65 extern LONGEST legacy_call_dummy_words
[];
66 extern int legacy_sizeof_call_dummy_words
;
68 /* Typical remote_translate_xfer_address */
69 extern gdbarch_remote_translate_xfer_address_ftype generic_remote_translate_xfer_address
;
71 /* Generic implementation of prologue_frameless_p. Just calls
72 SKIP_PROLOG and checks the return value to see if it actually
74 extern gdbarch_prologue_frameless_p_ftype generic_prologue_frameless_p
;
76 /* The only possible cases for inner_than. */
77 extern int core_addr_lessthan (CORE_ADDR lhs
, CORE_ADDR rhs
);
78 extern int core_addr_greaterthan (CORE_ADDR lhs
, CORE_ADDR rhs
);
80 /* Floating point values. */
81 extern const struct floatformat
*default_float_format (struct gdbarch
*gdbarch
);
82 extern const struct floatformat
*default_double_format (struct gdbarch
*gdbarch
);
84 /* Helper function for targets that don't know how my arguments are
86 extern int frame_num_args_unknown (struct frame_info
*fi
);
89 /* The following DEPRECATED interfaces are for pre- multi-arch legacy
92 /* DEPRECATED pre- multi-arch interface. Explicitly set the dynamic
93 target-system-dependent parameters based on bfd_architecture and
94 machine. This function is deprecated, use
95 set_gdbarch_from_arch_machine(). */
97 extern void set_architecture_from_arch_mach (enum bfd_architecture
, unsigned long);
99 /* DEPRECATED pre- multi-arch interface. Notify the target dependent
100 backend of a change to the selected architecture. A zero return
101 status indicates that the target did not like the change. */
103 extern int (*target_architecture_hook
) (const struct bfd_arch_info
*);
105 /* Identity function on a CORE_ADDR. Just returns its parameter. */
107 extern CORE_ADDR
core_addr_identity (CORE_ADDR addr
);
109 /* No-op conversion of reg to regnum. */
111 extern int no_op_reg_to_regnum (int reg
);
113 /* Default prepare_to_procced. */
115 extern int default_prepare_to_proceed (int select_it
);
117 extern int generic_prepare_to_proceed (int select_it
);
119 /* Versions of init_frame_pc(). Do nothing; do the default. */
121 extern CORE_ADDR
init_frame_pc_noop (int fromleaf
, struct frame_info
*prev
);
123 extern CORE_ADDR
init_frame_pc_default (int fromleaf
, struct frame_info
*prev
);
125 /* Do nothing version of elf_make_msymbol_special. */
127 void default_elf_make_msymbol_special (asymbol
*sym
, struct minimal_symbol
*msym
);
129 /* Do nothing version of coff_make_msymbol_special. */
131 void default_coff_make_msymbol_special (int val
, struct minimal_symbol
*msym
);
133 /* Version of cannot_fetch_register() / cannot_store_register() that
136 int cannot_register_not (int regnum
);
138 /* Legacy version of target_virtual_frame_pointer(). Assumes that
139 there is an DEPRECATED_FP_REGNUM and that it is the same, cooked or
142 extern gdbarch_virtual_frame_pointer_ftype legacy_virtual_frame_pointer
;
144 extern CORE_ADDR
generic_skip_trampoline_code (CORE_ADDR pc
);
146 extern int generic_in_solib_call_trampoline (CORE_ADDR pc
, char *name
);
148 extern int generic_in_solib_return_trampoline (CORE_ADDR pc
, char *name
);
150 extern int generic_in_function_epilogue_p (struct gdbarch
*gdbarch
, CORE_ADDR pc
);
152 /* Assume that the world is sane, a registers raw and virtual size
153 both match its type. */
155 extern int generic_register_size (int regnum
);
157 /* Assume that the world is sane, the registers are all adjacent. */
158 extern int generic_register_byte (int regnum
);
160 /* Prop up old targets that use various IN_SIGTRAMP() macros. */
161 extern int legacy_pc_in_sigtramp (CORE_ADDR pc
, char *name
);
163 /* The orginal register_convert*() functions were overloaded. They
164 were used to both: convert between virtual and raw register formats
165 (something that is discouraged); and to convert a register to the
166 type of a corresponding variable. These legacy functions preserve
167 that overloaded behavour in existing targets. */
168 extern int legacy_convert_register_p (int regnum
);
169 extern void legacy_register_to_value (int regnum
, struct type
*type
, char *from
, char *to
);
170 extern void legacy_value_to_register (struct type
*type
, int regnum
, char *from
, char *to
);
172 /* For compatibility with older architectures, returns
173 (LEGACY_SIM_REGNO_IGNORE) when the register doesn't have a valid
176 extern int legacy_register_sim_regno (int regnum
);
178 /* Initialize a ``struct info''. Can't use memset(0) since some
179 default values are not zero. */
180 extern void gdbarch_info_init (struct gdbarch_info
*info
);