1 /* Dynamic architecture support for GDB, the GNU debugger.
3 Copyright (C) 1998-2016 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;
29 #define GDBARCH_BREAKPOINT_MANIPULATION(ARCH,BREAK_INSN) \
31 ARCH##_breakpoint_kind_from_pc (struct gdbarch *gdbarch, \
34 return sizeof (BREAK_INSN); \
36 static const gdb_byte * \
37 ARCH##_sw_breakpoint_from_kind (struct gdbarch *gdbarch, \
38 int kind, int *size) \
44 #define SET_GDBARCH_BREAKPOINT_MANIPULATION(ARCH) \
45 set_gdbarch_breakpoint_kind_from_pc (gdbarch, \
46 ARCH##_breakpoint_kind_from_pc); \
47 set_gdbarch_sw_breakpoint_from_kind (gdbarch, \
48 ARCH##_sw_breakpoint_from_kind)
50 #define GDBARCH_BREAKPOINT_MANIPULATION_ENDIAN(ARCH, \
54 ARCH##_breakpoint_kind_from_pc (struct gdbarch *gdbarch, \
57 gdb_static_assert (ARRAY_SIZE (LITTLE_BREAK_INSN) \
58 == ARRAY_SIZE (BIG_BREAK_INSN)); \
59 return sizeof (BIG_BREAK_INSN); \
61 static const gdb_byte * \
62 ARCH##_sw_breakpoint_from_kind (struct gdbarch *gdbarch, \
63 int kind, int *size) \
66 if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) \
67 return BIG_BREAK_INSN; \
69 return LITTLE_BREAK_INSN; \
72 /* An implementation of gdbarch_displaced_step_copy_insn for
73 processors that don't need to modify the instruction before
74 single-stepping the displaced copy.
76 Simply copy gdbarch_max_insn_length (ARCH) bytes from FROM to TO.
77 The closure is an array of that many bytes containing the
78 instruction's bytes, allocated with xmalloc. */
79 extern struct displaced_step_closure *
80 simple_displaced_step_copy_insn (struct gdbarch *gdbarch,
81 CORE_ADDR from, CORE_ADDR to,
82 struct regcache *regs);
84 /* Simple implementation of gdbarch_displaced_step_free_closure: Call
86 This is appropriate for use with simple_displaced_step_copy_insn. */
88 simple_displaced_step_free_closure (struct gdbarch *gdbarch,
89 struct displaced_step_closure *closure);
91 /* Default implementation of gdbarch_displaced_hw_singlestep. */
93 default_displaced_step_hw_singlestep (struct gdbarch *,
94 struct displaced_step_closure *);
96 /* Possible value for gdbarch_displaced_step_location:
97 Place displaced instructions at the program's entry point,
98 leaving space for inferior function call return breakpoints. */
99 extern CORE_ADDR displaced_step_at_entry_point (struct gdbarch *gdbarch);
101 /* The only possible cases for inner_than. */
102 extern int core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs);
103 extern int core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs);
105 /* Identity functions on a CORE_ADDR. Just return the "addr". */
107 extern CORE_ADDR core_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr);
108 extern gdbarch_convert_from_func_ptr_addr_ftype convert_from_func_ptr_addr_identity;
110 /* No-op conversion of reg to regnum. */
112 extern int no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg);
114 /* Do nothing version of coff_make_msymbol_special. */
116 void default_coff_make_msymbol_special (int val, struct minimal_symbol *msym);
118 /* Do nothing default implementation of gdbarch_make_symbol_special. */
120 void default_make_symbol_special (struct symbol *sym, struct objfile *objfile);
122 /* Do nothing default implementation of gdbarch_adjust_dwarf2_addr. */
124 CORE_ADDR default_adjust_dwarf2_addr (CORE_ADDR pc);
126 /* Do nothing default implementation of gdbarch_adjust_dwarf2_line. */
128 CORE_ADDR default_adjust_dwarf2_line (CORE_ADDR addr, int rel);
130 /* Version of cannot_fetch_register() / cannot_store_register() that
133 int cannot_register_not (struct gdbarch *gdbarch, int regnum);
135 /* Legacy version of target_virtual_frame_pointer(). Assumes that
136 there is an gdbarch_deprecated_fp_regnum and that it is the same, cooked or
139 extern gdbarch_virtual_frame_pointer_ftype legacy_virtual_frame_pointer;
141 /* Default implementation of gdbarch_floatformat_for_type. */
142 extern const struct floatformat **
143 default_floatformat_for_type (struct gdbarch *gdbarch,
144 const char *name, int len);
146 extern CORE_ADDR generic_skip_trampoline_code (struct frame_info *frame,
149 extern CORE_ADDR generic_skip_solib_resolver (struct gdbarch *gdbarch,
152 extern int generic_in_solib_return_trampoline (struct gdbarch *gdbarch,
153 CORE_ADDR pc, const char *name);
155 extern int generic_stack_frame_destroyed_p (struct gdbarch *gdbarch,
158 extern int default_code_of_frame_writable (struct gdbarch *gdbarch,
159 struct frame_info *frame);
161 /* By default, registers are not convertible. */
162 extern int generic_convert_register_p (struct gdbarch *gdbarch, int regnum,
165 extern int default_stabs_argument_has_addr (struct gdbarch *gdbarch,
168 extern int generic_instruction_nullified (struct gdbarch *gdbarch,
169 struct regcache *regcache);
171 int default_remote_register_number (struct gdbarch *gdbarch,
174 /* For compatibility with older architectures, returns
175 (LEGACY_SIM_REGNO_IGNORE) when the register doesn't have a valid
178 extern int legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum);
180 /* Return the selected byte order, or BFD_ENDIAN_UNKNOWN if no byte
181 order was explicitly selected. */
182 extern enum bfd_endian selected_byte_order (void);
184 /* Return the selected architecture's name, or NULL if no architecture
185 was explicitly selected. */
186 extern const char *selected_architecture_name (void);
188 /* Initialize a ``struct info''. Can't use memset(0) since some
189 default values are not zero. "fill" takes all available
190 information and fills in any unspecified fields. */
192 extern void gdbarch_info_init (struct gdbarch_info *info);
194 /* Similar to init, but this time fill in the blanks. Information is
195 obtained from the global "set ..." options and explicitly
196 initialized INFO fields. */
197 extern void gdbarch_info_fill (struct gdbarch_info *info);
199 /* Return the architecture for ABFD. If no suitable architecture
200 could be find, return NULL. */
202 extern struct gdbarch *gdbarch_from_bfd (bfd *abfd);
204 /* Return "current" architecture. If the target is running, this is the
205 architecture of the selected frame. Otherwise, the "current" architecture
206 defaults to the target architecture.
208 This function should normally be called solely by the command interpreter
209 routines to determine the architecture to execute a command in. */
210 extern struct gdbarch *get_current_arch (void);
212 extern int default_has_shared_address_space (struct gdbarch *);
214 extern int default_fast_tracepoint_valid_at (struct gdbarch *gdbarch,
215 CORE_ADDR addr, char **msg);
217 extern const gdb_byte *default_breakpoint_from_pc (struct gdbarch *gdbarch,
221 extern void default_gen_return_address (struct gdbarch *gdbarch,
222 struct agent_expr *ax,
223 struct axs_value *value,
226 extern const char *default_auto_charset (void);
227 extern const char *default_auto_wide_charset (void);
229 extern int default_return_in_first_hidden_param_p (struct gdbarch *,
232 extern int default_insn_is_call (struct gdbarch *, CORE_ADDR);
233 extern int default_insn_is_ret (struct gdbarch *, CORE_ADDR);
234 extern int default_insn_is_jump (struct gdbarch *, CORE_ADDR);
236 /* Do-nothing version of vsyscall_range. Returns false. */
238 extern int default_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range);
240 /* Default way to advance the PC to the next instruction in order to
241 skip a permanent breakpoint. Increments the PC by the size of a
242 software breakpoint instruction, as determined with
243 gdbarch_breakpoint_from_pc. This matches how the breakpoints
244 module determines whether a breakpoint is permanent. */
245 extern void default_skip_permanent_breakpoint (struct regcache *regcache);
247 /* Symbols for gdbarch_infcall_mmap; their Linux PROT_* system
248 definitions would be dependent on compilation host. */
249 #define GDB_MMAP_PROT_READ 0x1 /* Page can be read. */
250 #define GDB_MMAP_PROT_WRITE 0x2 /* Page can be written. */
251 #define GDB_MMAP_PROT_EXEC 0x4 /* Page can be executed. */
253 extern CORE_ADDR default_infcall_mmap (CORE_ADDR size, unsigned prot);
254 extern void default_infcall_munmap (CORE_ADDR addr, CORE_ADDR size);
255 extern char *default_gcc_target_options (struct gdbarch *gdbarch);
256 extern const char *default_gnu_triplet_regexp (struct gdbarch *gdbarch);
257 extern int default_addressable_memory_unit_size (struct gdbarch *gdbarch);
259 extern void default_guess_tracepoint_registers (struct gdbarch *gdbarch,
260 struct regcache *regcache,