1 /* Dynamic architecture support for GDB, the GNU debugger.
3 Copyright (C) 1998-2021 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/>. */
26 struct minimal_symbol
;
29 struct dwarf2_frame_state
;
31 template <size_t bp_size
, const gdb_byte
*break_insn
>
32 struct bp_manipulation
35 kind_from_pc (struct gdbarch
*gdbarch
, CORE_ADDR
*pcptr
)
40 static const gdb_byte
*
41 bp_from_kind (struct gdbarch
*gdbarch
, int kind
, int *size
)
48 template <size_t bp_size
,
49 const gdb_byte
*break_insn_little
,
50 const gdb_byte
*break_insn_big
>
51 struct bp_manipulation_endian
54 kind_from_pc (struct gdbarch
*gdbarch
, CORE_ADDR
*pcptr
)
59 static const gdb_byte
*
60 bp_from_kind (struct gdbarch
*gdbarch
, int kind
, int *size
)
63 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
64 return break_insn_big
;
66 return break_insn_little
;
70 #define BP_MANIPULATION(BREAK_INSN) \
71 bp_manipulation<sizeof (BREAK_INSN), BREAK_INSN>
73 #define BP_MANIPULATION_ENDIAN(BREAK_INSN_LITTLE, BREAK_INSN_BIG) \
74 bp_manipulation_endian<sizeof (BREAK_INSN_LITTLE), \
75 BREAK_INSN_LITTLE, BREAK_INSN_BIG>
77 /* Default implementation of gdbarch_displaced_hw_singlestep. */
78 extern bool default_displaced_step_hw_singlestep (struct gdbarch
*);
80 /* Possible value for gdbarch_displaced_step_location:
81 Place displaced instructions at the program's entry point,
82 leaving space for inferior function call return breakpoints. */
83 extern CORE_ADDR
displaced_step_at_entry_point (struct gdbarch
*gdbarch
);
85 /* The only possible cases for inner_than. */
86 extern int core_addr_lessthan (CORE_ADDR lhs
, CORE_ADDR rhs
);
87 extern int core_addr_greaterthan (CORE_ADDR lhs
, CORE_ADDR rhs
);
89 /* Identity functions on a CORE_ADDR. Just return the "addr". */
91 extern CORE_ADDR
core_addr_identity (struct gdbarch
*gdbarch
, CORE_ADDR addr
);
92 extern gdbarch_convert_from_func_ptr_addr_ftype convert_from_func_ptr_addr_identity
;
94 /* No-op conversion of reg to regnum. */
96 extern int no_op_reg_to_regnum (struct gdbarch
*gdbarch
, int reg
);
98 /* Do nothing version of coff_make_msymbol_special. */
100 void default_coff_make_msymbol_special (int val
, struct minimal_symbol
*msym
);
102 /* Do nothing default implementation of gdbarch_make_symbol_special. */
104 void default_make_symbol_special (struct symbol
*sym
, struct objfile
*objfile
);
106 /* Do nothing default implementation of gdbarch_adjust_dwarf2_addr. */
108 CORE_ADDR
default_adjust_dwarf2_addr (CORE_ADDR pc
);
110 /* Do nothing default implementation of gdbarch_adjust_dwarf2_line. */
112 CORE_ADDR
default_adjust_dwarf2_line (CORE_ADDR addr
, int rel
);
114 /* Default DWARF vendor CFI handler. */
116 bool default_execute_dwarf_cfa_vendor_op (struct gdbarch
*gdbarch
, gdb_byte op
,
117 struct dwarf2_frame_state
*fs
);
119 /* Version of cannot_fetch_register() / cannot_store_register() that
122 int cannot_register_not (struct gdbarch
*gdbarch
, int regnum
);
124 /* Legacy version of target_virtual_frame_pointer(). Assumes that
125 there is an gdbarch_deprecated_fp_regnum and that it is the same, cooked or
128 extern gdbarch_virtual_frame_pointer_ftype legacy_virtual_frame_pointer
;
130 /* Default implementation of gdbarch_floatformat_for_type. */
131 extern const struct floatformat
**
132 default_floatformat_for_type (struct gdbarch
*gdbarch
,
133 const char *name
, int len
);
135 /* Default implementation of gdbarch_memtag_to_string. */
136 extern std::string
default_memtag_to_string (struct gdbarch
*gdbarch
,
139 /* Default implementation of gdbarch_tagged_address_p. */
140 bool default_tagged_address_p (struct gdbarch
*gdbarch
, struct value
*address
);
142 /* Default implementation of gdbarch_memtag_matches_p. */
143 extern bool default_memtag_matches_p (struct gdbarch
*gdbarch
,
144 struct value
*address
);
146 /* Default implementation of gdbarch_set_memtags. */
147 bool default_set_memtags (struct gdbarch
*gdbarch
,
148 struct value
*address
, size_t length
,
149 const gdb::byte_vector
&tags
,
150 memtag_type tag_type
);
152 /* Default implementation of gdbarch_get_memtag. */
153 struct value
*default_get_memtag (struct gdbarch
*gdbarch
,
154 struct value
*address
,
155 memtag_type tag_type
);
157 extern CORE_ADDR
generic_skip_trampoline_code (struct frame_info
*frame
,
160 extern CORE_ADDR
generic_skip_solib_resolver (struct gdbarch
*gdbarch
,
163 extern int generic_in_solib_return_trampoline (struct gdbarch
*gdbarch
,
164 CORE_ADDR pc
, const char *name
);
166 extern int generic_stack_frame_destroyed_p (struct gdbarch
*gdbarch
,
169 extern int default_code_of_frame_writable (struct gdbarch
*gdbarch
,
170 struct frame_info
*frame
);
172 /* By default, registers are not convertible. */
173 extern int generic_convert_register_p (struct gdbarch
*gdbarch
, int regnum
,
176 extern int default_stabs_argument_has_addr (struct gdbarch
*gdbarch
,
179 extern int generic_instruction_nullified (struct gdbarch
*gdbarch
,
180 struct regcache
*regcache
);
182 int default_remote_register_number (struct gdbarch
*gdbarch
,
185 /* For compatibility with older architectures, returns
186 (LEGACY_SIM_REGNO_IGNORE) when the register doesn't have a valid
189 extern int legacy_register_sim_regno (struct gdbarch
*gdbarch
, int regnum
);
191 /* Return the selected byte order, or BFD_ENDIAN_UNKNOWN if no byte
192 order was explicitly selected. */
193 extern enum bfd_endian
selected_byte_order (void);
195 /* Return the selected architecture's name, or NULL if no architecture
196 was explicitly selected. */
197 extern const char *selected_architecture_name (void);
199 /* Initialize a ``struct info''. Can't use memset(0) since some
200 default values are not zero. "fill" takes all available
201 information and fills in any unspecified fields. */
203 extern void gdbarch_info_init (struct gdbarch_info
*info
);
205 /* Similar to init, but this time fill in the blanks. Information is
206 obtained from the global "set ..." options and explicitly
207 initialized INFO fields. */
208 extern void gdbarch_info_fill (struct gdbarch_info
*info
);
210 /* Return the architecture for ABFD. If no suitable architecture
211 could be find, return NULL. */
213 extern struct gdbarch
*gdbarch_from_bfd (bfd
*abfd
);
215 /* Return "current" architecture. If the target is running, this is the
216 architecture of the selected frame. Otherwise, the "current" architecture
217 defaults to the target architecture.
219 This function should normally be called solely by the command interpreter
220 routines to determine the architecture to execute a command in. */
221 extern struct gdbarch
*get_current_arch (void);
223 extern int default_has_shared_address_space (struct gdbarch
*);
225 extern int default_fast_tracepoint_valid_at (struct gdbarch
*gdbarch
,
226 CORE_ADDR addr
, std::string
*msg
);
228 extern const gdb_byte
*default_breakpoint_from_pc (struct gdbarch
*gdbarch
,
232 extern int default_breakpoint_kind_from_current_state (struct gdbarch
*gdbarch
,
233 struct regcache
*regcache
,
236 extern void default_gen_return_address (struct gdbarch
*gdbarch
,
237 struct agent_expr
*ax
,
238 struct axs_value
*value
,
241 extern const char *default_auto_charset (void);
242 extern const char *default_auto_wide_charset (void);
244 extern int default_return_in_first_hidden_param_p (struct gdbarch
*,
247 extern int default_insn_is_call (struct gdbarch
*, CORE_ADDR
);
248 extern int default_insn_is_ret (struct gdbarch
*, CORE_ADDR
);
249 extern int default_insn_is_jump (struct gdbarch
*, CORE_ADDR
);
251 /* Default implementation of gdbarch_program_breakpoint_here_p. */
252 extern bool default_program_breakpoint_here_p (struct gdbarch
*gdbarch
,
255 /* Do-nothing version of vsyscall_range. Returns false. */
257 extern int default_vsyscall_range (struct gdbarch
*gdbarch
, struct mem_range
*range
);
259 /* Default way to advance the PC to the next instruction in order to
260 skip a permanent breakpoint. Increments the PC by the size of a
261 software breakpoint instruction, as determined with
262 gdbarch_breakpoint_from_pc. This matches how the breakpoints
263 module determines whether a breakpoint is permanent. */
264 extern void default_skip_permanent_breakpoint (struct regcache
*regcache
);
266 /* Symbols for gdbarch_infcall_mmap; their Linux PROT_* system
267 definitions would be dependent on compilation host. */
268 #define GDB_MMAP_PROT_READ 0x1 /* Page can be read. */
269 #define GDB_MMAP_PROT_WRITE 0x2 /* Page can be written. */
270 #define GDB_MMAP_PROT_EXEC 0x4 /* Page can be executed. */
272 extern CORE_ADDR
default_infcall_mmap (CORE_ADDR size
, unsigned prot
);
273 extern void default_infcall_munmap (CORE_ADDR addr
, CORE_ADDR size
);
274 extern std::string
default_gcc_target_options (struct gdbarch
*gdbarch
);
275 extern const char *default_gnu_triplet_regexp (struct gdbarch
*gdbarch
);
276 extern int default_addressable_memory_unit_size (struct gdbarch
*gdbarch
);
278 extern void default_guess_tracepoint_registers (struct gdbarch
*gdbarch
,
279 struct regcache
*regcache
,
282 extern int default_print_insn (bfd_vma memaddr
, disassemble_info
*info
);
284 /* Wrapper to gdbarch_skip_prologue, but doesn't throw exception. Catch
285 exception thrown from gdbarch_skip_prologue, and return PC. */
287 extern CORE_ADDR
gdbarch_skip_prologue_noexcept (gdbarch
*gdbarch
,
288 CORE_ADDR pc
) noexcept
;
290 /* Default implementation of gdbarch_in_indirect_branch_thunk that returns
292 extern bool default_in_indirect_branch_thunk (gdbarch
*gdbarch
,
295 /* Default implementation of gdbarch type_align method. */
296 extern ULONGEST
default_type_align (struct gdbarch
*gdbarch
,
299 /* Default implementation of gdbarch get_pc_address_flags method. */
300 extern std::string
default_get_pc_address_flags (frame_info
*frame
,
303 /* Default implementation of gdbarch read_core_file_mappings method. */
304 extern void default_read_core_file_mappings (struct gdbarch
*gdbarch
,
306 gdb::function_view
<void (ULONGEST count
)>
308 gdb::function_view
<void (int num
,
312 const char *filename
)>
314 #endif /* ARCH_UTILS_H */