1 /* Dynamic architecture support for GDB, the GNU debugger.
3 Copyright (C) 1998, 1999, 2000, 2002, 2003, 2004, 2007, 2008
4 Free Software Foundation, Inc.
6 This file is part of GDB.
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 3 of the License, or
11 (at your option) any later version.
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.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #ifndef GDBARCH_UTILS_H
22 #define GDBARCH_UTILS_H
26 struct minimal_symbol;
30 /* gdbarch trace variable */
31 extern int gdbarch_debug;
33 /* An implementation of gdbarch_displaced_step_copy_insn for
34 processors that don't need to modify the instruction before
35 single-stepping the displaced copy.
37 Simply copy gdbarch_max_insn_length (ARCH) bytes from FROM to TO.
38 The closure is an array of that many bytes containing the
39 instruction's bytes, allocated with xmalloc. */
40 extern struct displaced_step_closure *
41 simple_displaced_step_copy_insn (struct gdbarch *gdbarch,
42 CORE_ADDR from, CORE_ADDR to,
43 struct regcache *regs);
45 /* Simple implementation of gdbarch_displaced_step_free_closure: Call
47 This is appropriate for use with simple_displaced_step_copy_insn. */
49 simple_displaced_step_free_closure (struct gdbarch *gdbarch,
50 struct displaced_step_closure *closure);
52 /* Possible value for gdbarch_displaced_step_location:
53 Place displaced instructions at the program's entry point,
54 leaving space for inferior function call return breakpoints. */
55 extern CORE_ADDR displaced_step_at_entry_point (struct gdbarch *gdbarch);
57 /* The only possible cases for inner_than. */
58 extern int core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs);
59 extern int core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs);
61 /* Identity functions on a CORE_ADDR. Just return the "addr". */
63 extern CORE_ADDR core_addr_identity (CORE_ADDR addr);
64 extern gdbarch_convert_from_func_ptr_addr_ftype convert_from_func_ptr_addr_identity;
66 /* No-op conversion of reg to regnum. */
68 extern int no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg);
70 /* Do nothing version of elf_make_msymbol_special. */
72 void default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym);
74 /* Do nothing version of coff_make_msymbol_special. */
76 void default_coff_make_msymbol_special (int val, struct minimal_symbol *msym);
78 /* Version of cannot_fetch_register() / cannot_store_register() that
81 int cannot_register_not (struct gdbarch *gdbarch, int regnum);
83 /* Legacy version of target_virtual_frame_pointer(). Assumes that
84 there is an gdbarch_deprecated_fp_regnum and that it is the same, cooked or
87 extern gdbarch_virtual_frame_pointer_ftype legacy_virtual_frame_pointer;
89 extern CORE_ADDR generic_skip_trampoline_code (struct frame_info *frame,
92 extern CORE_ADDR generic_skip_solib_resolver (struct gdbarch *gdbarch,
95 extern int generic_in_solib_return_trampoline (CORE_ADDR pc, char *name);
97 extern int generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc);
99 /* By default, registers are not convertible. */
100 extern int generic_convert_register_p (struct gdbarch *gdbarch, int regnum,
103 extern int default_stabs_argument_has_addr (struct gdbarch *gdbarch,
106 extern int generic_instruction_nullified (struct gdbarch *gdbarch,
107 struct regcache *regcache);
109 int default_remote_register_number (struct gdbarch *gdbarch,
112 /* For compatibility with older architectures, returns
113 (LEGACY_SIM_REGNO_IGNORE) when the register doesn't have a valid
116 extern int legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum);
118 /* Return the selected byte order, or BFD_ENDIAN_UNKNOWN if no byte
119 order was explicitly selected. */
120 extern enum bfd_endian selected_byte_order (void);
122 /* Return the selected architecture's name, or NULL if no architecture
123 was explicitly selected. */
124 extern const char *selected_architecture_name (void);
126 /* Initialize a ``struct info''. Can't use memset(0) since some
127 default values are not zero. "fill" takes all available
128 information and fills in any unspecified fields. */
130 extern void gdbarch_info_init (struct gdbarch_info *info);
132 /* Similar to init, but this time fill in the blanks. Information is
133 obtained from the global "set ..." options and explicitly
134 initialized INFO fields. */
135 extern void gdbarch_info_fill (struct gdbarch_info *info);
137 /* Return the architecture for ABFD. If no suitable architecture
138 could be find, return NULL. */
140 extern struct gdbarch *gdbarch_from_bfd (bfd *abfd);