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 /* 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 /* The following DEPRECATED interfaces are for pre- multi-arch legacy
87 /* DEPRECATED pre- multi-arch interface. Explicitly set the dynamic
88 target-system-dependent parameters based on bfd_architecture and
89 machine. This function is deprecated, use
90 set_gdbarch_from_arch_machine(). */
92 extern void set_architecture_from_arch_mach (enum bfd_architecture, unsigned long);
94 /* DEPRECATED pre- multi-arch interface. Notify the target dependent
95 backend of a change to the selected architecture. A zero return
96 status indicates that the target did not like the change. */
98 extern int (*target_architecture_hook) (const struct bfd_arch_info *);
100 /* Identity function on a CORE_ADDR. Just returns its parameter. */
102 extern CORE_ADDR core_addr_identity (CORE_ADDR addr);
104 /* No-op conversion of reg to regnum. */
106 extern int no_op_reg_to_regnum (int reg);
108 /* Versions of init_frame_pc(). Do nothing; do the default. */
110 extern CORE_ADDR init_frame_pc_noop (int fromleaf, struct frame_info *prev);
112 extern CORE_ADDR init_frame_pc_default (int fromleaf, struct frame_info *prev);
114 /* Do nothing version of elf_make_msymbol_special. */
116 void default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym);
118 /* Do nothing version of coff_make_msymbol_special. */
120 void default_coff_make_msymbol_special (int val, struct minimal_symbol *msym);
122 /* Version of cannot_fetch_register() / cannot_store_register() that
125 int cannot_register_not (int regnum);
127 /* Legacy version of target_virtual_frame_pointer(). Assumes that
128 there is an DEPRECATED_FP_REGNUM and that it is the same, cooked or
131 extern gdbarch_virtual_frame_pointer_ftype legacy_virtual_frame_pointer;
133 extern CORE_ADDR generic_skip_trampoline_code (CORE_ADDR pc);
135 extern int generic_in_solib_call_trampoline (CORE_ADDR pc, char *name);
137 extern int generic_in_solib_return_trampoline (CORE_ADDR pc, char *name);
139 extern int generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc);
141 /* Assume that the world is sane, a registers raw and virtual size
142 both match its type. */
144 extern int generic_register_size (int regnum);
146 /* Assume that the world is sane, the registers are all adjacent. */
147 extern int generic_register_byte (int regnum);
149 /* Prop up old targets that use various IN_SIGTRAMP() macros. */
150 extern int legacy_pc_in_sigtramp (CORE_ADDR pc, char *name);
152 /* The orginal register_convert*() functions were overloaded. They
153 were used to both: convert between virtual and raw register formats
154 (something that is discouraged); and to convert a register to the
155 type of a corresponding variable. These legacy functions preserve
156 that overloaded behavour in existing targets. */
157 extern int legacy_convert_register_p (int regnum, struct type *type);
158 extern void legacy_register_to_value (struct frame_info *frame, int regnum,
159 struct type *type, void *to);
160 extern void legacy_value_to_register (struct frame_info *frame, int regnum,
161 struct type *type, const void *from);
163 /* For compatibility with older architectures, returns
164 (LEGACY_SIM_REGNO_IGNORE) when the register doesn't have a valid
167 extern int legacy_register_sim_regno (int regnum);
169 /* Initialize a ``struct info''. Can't use memset(0) since some
170 default values are not zero. */
171 extern void gdbarch_info_init (struct gdbarch_info *info);