1 /* Dynamic architecture support for GDB, the GNU debugger.
3 Copyright (C) 1998-2018 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 3 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, see <http://www.gnu.org/licenses/>. */
20 #ifndef GDBARCH_UTILS_H
21 #define GDBARCH_UTILS_H
25 struct minimal_symbol;
28 struct dwarf2_frame_state;
30 template <size_t bp_size, const gdb_byte *break_insn>
31 struct bp_manipulation
34 kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr)
39 static const gdb_byte *
40 bp_from_kind (struct gdbarch *gdbarch, int kind, int *size)
47 template <size_t bp_size,
48 const gdb_byte *break_insn_little,
49 const gdb_byte *break_insn_big>
50 struct bp_manipulation_endian
53 kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr)
58 static const gdb_byte *
59 bp_from_kind (struct gdbarch *gdbarch, int kind, int *size)
62 if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
63 return break_insn_big;
65 return break_insn_little;
69 #define BP_MANIPULATION(BREAK_INSN) \
70 bp_manipulation<sizeof (BREAK_INSN), BREAK_INSN>
72 #define BP_MANIPULATION_ENDIAN(BREAK_INSN_LITTLE, BREAK_INSN_BIG) \
73 bp_manipulation_endian<sizeof (BREAK_INSN_LITTLE), \
74 BREAK_INSN_LITTLE, BREAK_INSN_BIG>
76 /* Default implementation of gdbarch_displaced_hw_singlestep. */
78 default_displaced_step_hw_singlestep (struct gdbarch *,
79 struct displaced_step_closure *);
81 /* Possible value for gdbarch_displaced_step_location:
82 Place displaced instructions at the program's entry point,
83 leaving space for inferior function call return breakpoints. */
84 extern CORE_ADDR displaced_step_at_entry_point (struct gdbarch *gdbarch);
86 /* The only possible cases for inner_than. */
87 extern int core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs);
88 extern int core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs);
90 /* Identity functions on a CORE_ADDR. Just return the "addr". */
92 extern CORE_ADDR core_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr);
93 extern gdbarch_convert_from_func_ptr_addr_ftype convert_from_func_ptr_addr_identity;
95 /* No-op conversion of reg to regnum. */
97 extern int no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg);
99 /* Do nothing version of coff_make_msymbol_special. */
101 void default_coff_make_msymbol_special (int val, struct minimal_symbol *msym);
103 /* Do nothing default implementation of gdbarch_make_symbol_special. */
105 void default_make_symbol_special (struct symbol *sym, struct objfile *objfile);
107 /* Do nothing default implementation of gdbarch_adjust_dwarf2_addr. */
109 CORE_ADDR default_adjust_dwarf2_addr (CORE_ADDR pc);
111 /* Do nothing default implementation of gdbarch_adjust_dwarf2_line. */
113 CORE_ADDR default_adjust_dwarf2_line (CORE_ADDR addr, int rel);
115 /* Default DWARF vendor CFI handler. */
117 bool default_execute_dwarf_cfa_vendor_op (struct gdbarch *gdbarch, gdb_byte op,
118 struct dwarf2_frame_state *fs);
120 /* Version of cannot_fetch_register() / cannot_store_register() that
123 int cannot_register_not (struct gdbarch *gdbarch, int regnum);
125 /* Legacy version of target_virtual_frame_pointer(). Assumes that
126 there is an gdbarch_deprecated_fp_regnum and that it is the same, cooked or
129 extern gdbarch_virtual_frame_pointer_ftype legacy_virtual_frame_pointer;
131 /* Default implementation of gdbarch_floatformat_for_type. */
132 extern const struct floatformat **
133 default_floatformat_for_type (struct gdbarch *gdbarch,
134 const char *name, int len);
136 extern CORE_ADDR generic_skip_trampoline_code (struct frame_info *frame,
139 extern CORE_ADDR generic_skip_solib_resolver (struct gdbarch *gdbarch,
142 extern int generic_in_solib_return_trampoline (struct gdbarch *gdbarch,
143 CORE_ADDR pc, const char *name);
145 extern int generic_stack_frame_destroyed_p (struct gdbarch *gdbarch,
148 extern int default_code_of_frame_writable (struct gdbarch *gdbarch,
149 struct frame_info *frame);
151 /* By default, registers are not convertible. */
152 extern int generic_convert_register_p (struct gdbarch *gdbarch, int regnum,
155 extern int default_stabs_argument_has_addr (struct gdbarch *gdbarch,
158 extern int generic_instruction_nullified (struct gdbarch *gdbarch,
159 struct regcache *regcache);
161 int default_remote_register_number (struct gdbarch *gdbarch,
164 /* For compatibility with older architectures, returns
165 (LEGACY_SIM_REGNO_IGNORE) when the register doesn't have a valid
168 extern int legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum);
170 /* Return the selected byte order, or BFD_ENDIAN_UNKNOWN if no byte
171 order was explicitly selected. */
172 extern enum bfd_endian selected_byte_order (void);
174 /* Return the selected architecture's name, or NULL if no architecture
175 was explicitly selected. */
176 extern const char *selected_architecture_name (void);
178 /* Initialize a ``struct info''. Can't use memset(0) since some
179 default values are not zero. "fill" takes all available
180 information and fills in any unspecified fields. */
182 extern void gdbarch_info_init (struct gdbarch_info *info);
184 /* Similar to init, but this time fill in the blanks. Information is
185 obtained from the global "set ..." options and explicitly
186 initialized INFO fields. */
187 extern void gdbarch_info_fill (struct gdbarch_info *info);
189 /* Return the architecture for ABFD. If no suitable architecture
190 could be find, return NULL. */
192 extern struct gdbarch *gdbarch_from_bfd (bfd *abfd);
194 /* Return "current" architecture. If the target is running, this is the
195 architecture of the selected frame. Otherwise, the "current" architecture
196 defaults to the target architecture.
198 This function should normally be called solely by the command interpreter
199 routines to determine the architecture to execute a command in. */
200 extern struct gdbarch *get_current_arch (void);
202 extern int default_has_shared_address_space (struct gdbarch *);
204 extern int default_fast_tracepoint_valid_at (struct gdbarch *gdbarch,
205 CORE_ADDR addr, std::string *msg);
207 extern const gdb_byte *default_breakpoint_from_pc (struct gdbarch *gdbarch,
211 extern int default_breakpoint_kind_from_current_state (struct gdbarch *gdbarch,
212 struct regcache *regcache,
215 extern void default_gen_return_address (struct gdbarch *gdbarch,
216 struct agent_expr *ax,
217 struct axs_value *value,
220 extern const char *default_auto_charset (void);
221 extern const char *default_auto_wide_charset (void);
223 extern int default_return_in_first_hidden_param_p (struct gdbarch *,
226 extern int default_insn_is_call (struct gdbarch *, CORE_ADDR);
227 extern int default_insn_is_ret (struct gdbarch *, CORE_ADDR);
228 extern int default_insn_is_jump (struct gdbarch *, CORE_ADDR);
230 /* Do-nothing version of vsyscall_range. Returns false. */
232 extern int default_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range);
234 /* Default way to advance the PC to the next instruction in order to
235 skip a permanent breakpoint. Increments the PC by the size of a
236 software breakpoint instruction, as determined with
237 gdbarch_breakpoint_from_pc. This matches how the breakpoints
238 module determines whether a breakpoint is permanent. */
239 extern void default_skip_permanent_breakpoint (struct regcache *regcache);
241 /* Symbols for gdbarch_infcall_mmap; their Linux PROT_* system
242 definitions would be dependent on compilation host. */
243 #define GDB_MMAP_PROT_READ 0x1 /* Page can be read. */
244 #define GDB_MMAP_PROT_WRITE 0x2 /* Page can be written. */
245 #define GDB_MMAP_PROT_EXEC 0x4 /* Page can be executed. */
247 extern CORE_ADDR default_infcall_mmap (CORE_ADDR size, unsigned prot);
248 extern void default_infcall_munmap (CORE_ADDR addr, CORE_ADDR size);
249 extern char *default_gcc_target_options (struct gdbarch *gdbarch);
250 extern const char *default_gnu_triplet_regexp (struct gdbarch *gdbarch);
251 extern int default_addressable_memory_unit_size (struct gdbarch *gdbarch);
253 extern void default_guess_tracepoint_registers (struct gdbarch *gdbarch,
254 struct regcache *regcache,
257 extern int default_print_insn (bfd_vma memaddr, disassemble_info *info);
259 /* Wrapper to gdbarch_skip_prologue, but doesn't throw exception. Catch
260 exception thrown from gdbarch_skip_prologue, and return PC. */
262 extern CORE_ADDR gdbarch_skip_prologue_noexcept (gdbarch *gdbarch,
263 CORE_ADDR pc) noexcept;
265 /* Default implementation of gdbarch_in_indirect_branch_thunk that returns
267 extern bool default_in_indirect_branch_thunk (gdbarch *gdbarch,
270 /* Default implementation of gdbarch type_align method. */
271 extern ULONGEST default_type_align (struct gdbarch *gdbarch,