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
25 /* gdbarch trace variable */
26 extern int gdbarch_debug;
28 /* Fallback for register convertible. */
29 extern gdbarch_register_convertible_ftype generic_register_convertible_not;
31 extern CORE_ADDR generic_cannot_extract_struct_value_address (char *dummy);
33 /* Helper function for targets that don't know how my arguments are
35 extern gdbarch_frame_num_args_ftype frame_num_args_unknown;
37 /* Implementation of breakpoint from PC using any of the deprecated
38 macros BREAKPOINT, LITTLE_BREAKPOINT, BIG_BREAPOINT. For legacy
39 targets that don't yet implement their own breakpoint_from_pc(). */
40 extern gdbarch_breakpoint_from_pc_ftype legacy_breakpoint_from_pc;
42 /* Implementation of extract return value that grubs around in the
44 extern gdbarch_extract_return_value_ftype legacy_extract_return_value;
46 /* Implementation of store return value that grubs the register cache. */
47 extern gdbarch_store_return_value_ftype legacy_store_return_value;
49 /* Frameless functions not identifable. */
50 extern gdbarch_frameless_function_invocation_ftype generic_frameless_function_invocation_not;
52 /* Only structures, unions, and arrays are returned using the struct
53 convention. Note that arrays are never passed by value in the C
54 language family, so that case is irrelevant for C. */
55 extern gdbarch_return_value_on_stack_ftype generic_return_value_on_stack_not;
57 /* Map onto old REGISTER_NAMES. */
58 extern const char *legacy_register_name (int i);
60 /* Accessor for old global function pointer for disassembly. */
61 extern int legacy_print_insn (bfd_vma vma, disassemble_info *info);
63 /* Backward compatible call_dummy_words. */
64 extern LONGEST legacy_call_dummy_words[];
65 extern int legacy_sizeof_call_dummy_words;
67 /* Typical remote_translate_xfer_address */
68 extern gdbarch_remote_translate_xfer_address_ftype generic_remote_translate_xfer_address;
70 /* Generic implementation of prologue_frameless_p. Just calls
71 SKIP_PROLOG and checks the return value to see if it actually
73 extern gdbarch_prologue_frameless_p_ftype generic_prologue_frameless_p;
75 /* The only possible cases for inner_than. */
76 extern int core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs);
77 extern int core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs);
79 /* Floating point values. */
80 extern const struct floatformat *default_float_format (struct gdbarch *gdbarch);
81 extern const struct floatformat *default_double_format (struct gdbarch *gdbarch);
83 /* Helper function for targets that don't know how my arguments are
85 extern int frame_num_args_unknown (struct frame_info *fi);
88 /* The following DEPRECATED interfaces are for pre- multi-arch legacy
91 /* DEPRECATED pre- multi-arch interface. Explicitly set the dynamic
92 target-system-dependent parameters based on bfd_architecture and
93 machine. This function is deprecated, use
94 set_gdbarch_from_arch_machine(). */
96 extern void set_architecture_from_arch_mach (enum bfd_architecture, unsigned long);
98 /* DEPRECATED pre- multi-arch interface. Notify the target dependent
99 backend of a change to the selected architecture. A zero return
100 status indicates that the target did not like the change. */
102 extern int (*target_architecture_hook) (const struct bfd_arch_info *);
104 /* Identity function on a CORE_ADDR. Just returns its parameter. */
106 extern CORE_ADDR core_addr_identity (CORE_ADDR addr);
108 /* No-op conversion of reg to regnum. */
110 extern int no_op_reg_to_regnum (int reg);
112 /* Default prepare_to_procced. */
114 extern int default_prepare_to_proceed (int select_it);
116 extern int generic_prepare_to_proceed (int select_it);
118 /* Versions of init_frame_pc(). Do nothing; do the default. */
120 extern CORE_ADDR init_frame_pc_noop (int fromleaf, struct frame_info *prev);
122 extern CORE_ADDR init_frame_pc_default (int fromleaf, struct frame_info *prev);
124 /* Do nothing version of elf_make_msymbol_special. */
126 void default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym);
128 /* Do nothing version of coff_make_msymbol_special. */
130 void default_coff_make_msymbol_special (int val, struct minimal_symbol *msym);
132 /* Version of cannot_fetch_register() / cannot_store_register() that
135 int cannot_register_not (int regnum);
137 /* Legacy version of target_virtual_frame_pointer(). Assumes that
138 there is an FP_REGNUM and that it is the same, cooked or raw. */
140 extern gdbarch_virtual_frame_pointer_ftype legacy_virtual_frame_pointer;
142 extern CORE_ADDR generic_skip_trampoline_code (CORE_ADDR pc);
144 extern int generic_in_solib_call_trampoline (CORE_ADDR pc, char *name);
146 extern int generic_in_solib_return_trampoline (CORE_ADDR pc, char *name);
148 extern int generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc);
150 /* Assume that the world is sane, a registers raw and virtual size
151 both match its type. */
153 extern int generic_register_size (int regnum);
155 /* Assume that the world is sane, the registers are all adjacent. */
156 extern int generic_register_byte (int regnum);
158 /* Prop up old targets that use various IN_SIGTRAMP() macros. */
159 extern int legacy_pc_in_sigtramp (CORE_ADDR pc, char *name);
161 /* The orginal register_convert*() functions were overloaded. They
162 were used to both: convert between virtual and raw register formats
163 (something that is discouraged); and to convert a register to the
164 type of a corresponding variable. These legacy functions preserve
165 that overloaded behavour in existing targets. */
166 extern int legacy_convert_register_p (int regnum);
167 extern void legacy_register_to_value (int regnum, struct type *type, char *from, char *to);
168 extern void legacy_value_to_register (struct type *type, int regnum, char *from, char *to);
170 /* For compatibility with older architectures, returns
171 (LEGACY_SIM_REGNO_IGNORE) when the register doesn't have a valid
174 extern int legacy_register_sim_regno (int regnum);
176 /* Initialize a ``struct info''. Can't use memset(0) since some
177 default values are not zero. */
178 extern void gdbarch_info_init (struct gdbarch_info *info);