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_deprecated_register_convertible_ftype deprecated_register_convertible_not
;
37 extern CORE_ADDR
generic_cannot_extract_struct_value_address (char *dummy
);
39 /* Implementation of extract return value that grubs around in the
41 extern gdbarch_extract_return_value_ftype legacy_extract_return_value
;
43 /* Implementation of store return value that grubs the register cache. */
44 extern gdbarch_store_return_value_ftype legacy_store_return_value
;
46 /* To return any structure or union type by value, store it at the
47 address passed as an invisible first argument to the function. */
48 extern gdbarch_use_struct_convention_ftype always_use_struct_convention
;
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 /* Accessor for old global function pointer for disassembly. */
59 extern int legacy_print_insn (bfd_vma vma
, disassemble_info
*info
);
61 /* Backward compatible call_dummy_words. */
62 extern LONGEST legacy_call_dummy_words
[];
63 extern int legacy_sizeof_call_dummy_words
;
65 /* Typical remote_translate_xfer_address */
66 extern gdbarch_remote_translate_xfer_address_ftype generic_remote_translate_xfer_address
;
68 /* Generic implementation of prologue_frameless_p. Just calls
69 SKIP_PROLOG and checks the return value to see if it actually
71 extern gdbarch_prologue_frameless_p_ftype generic_prologue_frameless_p
;
73 /* The only possible cases for inner_than. */
74 extern int core_addr_lessthan (CORE_ADDR lhs
, CORE_ADDR rhs
);
75 extern int core_addr_greaterthan (CORE_ADDR lhs
, CORE_ADDR rhs
);
77 /* Floating point values. */
78 extern const struct floatformat
*default_float_format (struct gdbarch
*gdbarch
);
79 extern const struct floatformat
*default_double_format (struct gdbarch
*gdbarch
);
81 /* The following DEPRECATED interfaces are for pre- multi-arch legacy
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(). */
89 extern void set_architecture_from_arch_mach (enum bfd_architecture
, unsigned long);
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. */
95 extern int (*target_architecture_hook
) (const struct bfd_arch_info
*);
97 /* Identity function on a CORE_ADDR. Just returns its parameter. */
99 extern CORE_ADDR
core_addr_identity (CORE_ADDR addr
);
101 /* No-op conversion of reg to regnum. */
103 extern int no_op_reg_to_regnum (int reg
);
105 /* Versions of init_frame_pc(). Do nothing; do the default. */
107 extern CORE_ADDR
init_frame_pc_noop (int fromleaf
, struct frame_info
*prev
);
109 extern CORE_ADDR
init_frame_pc_default (int fromleaf
, struct frame_info
*prev
);
111 /* Do nothing version of elf_make_msymbol_special. */
113 void default_elf_make_msymbol_special (asymbol
*sym
, struct minimal_symbol
*msym
);
115 /* Do nothing version of coff_make_msymbol_special. */
117 void default_coff_make_msymbol_special (int val
, struct minimal_symbol
*msym
);
119 /* Version of cannot_fetch_register() / cannot_store_register() that
122 int cannot_register_not (int regnum
);
124 /* Legacy version of target_virtual_frame_pointer(). Assumes that
125 there is an DEPRECATED_FP_REGNUM and that it is the same, cooked or
128 extern gdbarch_virtual_frame_pointer_ftype legacy_virtual_frame_pointer
;
130 extern CORE_ADDR
generic_skip_trampoline_code (CORE_ADDR pc
);
132 extern int generic_in_solib_call_trampoline (CORE_ADDR pc
, char *name
);
134 extern int generic_in_solib_return_trampoline (CORE_ADDR pc
, char *name
);
136 extern int generic_in_function_epilogue_p (struct gdbarch
*gdbarch
, CORE_ADDR pc
);
138 /* Assume that the world is sane, a registers raw and virtual size
139 both match its type. */
141 extern int generic_register_size (int regnum
);
143 /* Assume that the world is sane, the registers are all adjacent. */
144 extern int generic_register_byte (int regnum
);
146 /* Prop up old targets that use various IN_SIGTRAMP() macros. */
147 extern int legacy_pc_in_sigtramp (CORE_ADDR pc
, char *name
);
149 /* The orginal register_convert*() functions were overloaded. They
150 were used to both: convert between virtual and raw register formats
151 (something that is discouraged); and to convert a register to the
152 type of a corresponding variable. These legacy functions preserve
153 that overloaded behavour in existing targets. */
154 extern int legacy_convert_register_p (int regnum
, struct type
*type
);
155 extern void legacy_register_to_value (struct frame_info
*frame
, int regnum
,
156 struct type
*type
, void *to
);
157 extern void legacy_value_to_register (struct frame_info
*frame
, int regnum
,
158 struct type
*type
, const void *from
);
160 /* For compatibility with older architectures, returns
161 (LEGACY_SIM_REGNO_IGNORE) when the register doesn't have a valid
164 extern int legacy_register_sim_regno (int regnum
);
166 /* Initialize a ``struct info''. Can't use memset(0) since some
167 default values are not zero. */
168 extern void gdbarch_info_init (struct gdbarch_info
*info
);