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_FROM_PC(ARCH) \
30 static const gdb_byte * \
31 ARCH##_breakpoint_from_pc (struct gdbarch *gdbarch, \
35 int kind = ARCH##_breakpoint_kind_from_pc (gdbarch, pcptr); \
37 return ARCH##_sw_breakpoint_from_kind (gdbarch, kind, lenptr); \
40 #define GDBARCH_BREAKPOINT_MANIPULATION(ARCH,BREAK_INSN) \
42 ARCH##_breakpoint_kind_from_pc (struct gdbarch *gdbarch, \
45 return sizeof (BREAK_INSN); \
47 static const gdb_byte * \
48 ARCH##_sw_breakpoint_from_kind (struct gdbarch *gdbarch, \
49 int kind, int *size) \
54 GDBARCH_BREAKPOINT_FROM_PC (ARCH)
56 #define SET_GDBARCH_BREAKPOINT_MANIPULATION(ARCH) \
57 set_gdbarch_breakpoint_from_pc (gdbarch, ARCH##_breakpoint_from_pc); \
58 set_gdbarch_breakpoint_kind_from_pc (gdbarch, \
59 ARCH##_breakpoint_kind_from_pc); \
60 set_gdbarch_sw_breakpoint_from_kind (gdbarch, \
61 ARCH##_sw_breakpoint_from_kind)
63 #define GDBARCH_BREAKPOINT_MANIPULATION_ENDIAN(ARCH, \
67 ARCH##_breakpoint_kind_from_pc (struct gdbarch *gdbarch, \
70 gdb_static_assert (ARRAY_SIZE (LITTLE_BREAK_INSN) \
71 == ARRAY_SIZE (BIG_BREAK_INSN)); \
72 return sizeof (BIG_BREAK_INSN); \
74 static const gdb_byte * \
75 ARCH##_sw_breakpoint_from_kind (struct gdbarch *gdbarch, \
76 int kind, int *size) \
79 if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) \
80 return BIG_BREAK_INSN; \
82 return LITTLE_BREAK_INSN; \
84 GDBARCH_BREAKPOINT_FROM_PC (ARCH)
86 /* An implementation of gdbarch_displaced_step_copy_insn for
87 processors that don't need to modify the instruction before
88 single-stepping the displaced copy.
90 Simply copy gdbarch_max_insn_length (ARCH) bytes from FROM to TO.
91 The closure is an array of that many bytes containing the
92 instruction's bytes, allocated with xmalloc. */
93 extern struct displaced_step_closure *
94 simple_displaced_step_copy_insn (struct gdbarch *gdbarch,
95 CORE_ADDR from, CORE_ADDR to,
96 struct regcache *regs);
98 /* Simple implementation of gdbarch_displaced_step_free_closure: Call
100 This is appropriate for use with simple_displaced_step_copy_insn. */
102 simple_displaced_step_free_closure (struct gdbarch *gdbarch,
103 struct displaced_step_closure *closure);
105 /* Default implementation of gdbarch_displaced_hw_singlestep. */
107 default_displaced_step_hw_singlestep (struct gdbarch *,
108 struct displaced_step_closure *);
110 /* Possible value for gdbarch_displaced_step_location:
111 Place displaced instructions at the program's entry point,
112 leaving space for inferior function call return breakpoints. */
113 extern CORE_ADDR displaced_step_at_entry_point (struct gdbarch *gdbarch);
115 /* The only possible cases for inner_than. */
116 extern int core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs);
117 extern int core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs);
119 /* Identity functions on a CORE_ADDR. Just return the "addr". */
121 extern CORE_ADDR core_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr);
122 extern gdbarch_convert_from_func_ptr_addr_ftype convert_from_func_ptr_addr_identity;
124 /* No-op conversion of reg to regnum. */
126 extern int no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg);
128 /* Do nothing version of coff_make_msymbol_special. */
130 void default_coff_make_msymbol_special (int val, struct minimal_symbol *msym);
132 /* Do nothing default implementation of gdbarch_make_symbol_special. */
134 void default_make_symbol_special (struct symbol *sym, struct objfile *objfile);
136 /* Do nothing default implementation of gdbarch_adjust_dwarf2_addr. */
138 CORE_ADDR default_adjust_dwarf2_addr (CORE_ADDR pc);
140 /* Do nothing default implementation of gdbarch_adjust_dwarf2_line. */
142 CORE_ADDR default_adjust_dwarf2_line (CORE_ADDR addr, int rel);
144 /* Version of cannot_fetch_register() / cannot_store_register() that
147 int cannot_register_not (struct gdbarch *gdbarch, int regnum);
149 /* Legacy version of target_virtual_frame_pointer(). Assumes that
150 there is an gdbarch_deprecated_fp_regnum and that it is the same, cooked or
153 extern gdbarch_virtual_frame_pointer_ftype legacy_virtual_frame_pointer;
155 /* Default implementation of gdbarch_floatformat_for_type. */
156 extern const struct floatformat **
157 default_floatformat_for_type (struct gdbarch *gdbarch,
158 const char *name, int len);
160 extern CORE_ADDR generic_skip_trampoline_code (struct frame_info *frame,
163 extern CORE_ADDR generic_skip_solib_resolver (struct gdbarch *gdbarch,
166 extern int generic_in_solib_return_trampoline (struct gdbarch *gdbarch,
167 CORE_ADDR pc, const char *name);
169 extern int generic_stack_frame_destroyed_p (struct gdbarch *gdbarch,
172 extern int default_code_of_frame_writable (struct gdbarch *gdbarch,
173 struct frame_info *frame);
175 /* By default, registers are not convertible. */
176 extern int generic_convert_register_p (struct gdbarch *gdbarch, int regnum,
179 extern int default_stabs_argument_has_addr (struct gdbarch *gdbarch,
182 extern int generic_instruction_nullified (struct gdbarch *gdbarch,
183 struct regcache *regcache);
185 int default_remote_register_number (struct gdbarch *gdbarch,
188 /* For compatibility with older architectures, returns
189 (LEGACY_SIM_REGNO_IGNORE) when the register doesn't have a valid
192 extern int legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum);
194 /* Return the selected byte order, or BFD_ENDIAN_UNKNOWN if no byte
195 order was explicitly selected. */
196 extern enum bfd_endian selected_byte_order (void);
198 /* Return the selected architecture's name, or NULL if no architecture
199 was explicitly selected. */
200 extern const char *selected_architecture_name (void);
202 /* Initialize a ``struct info''. Can't use memset(0) since some
203 default values are not zero. "fill" takes all available
204 information and fills in any unspecified fields. */
206 extern void gdbarch_info_init (struct gdbarch_info *info);
208 /* Similar to init, but this time fill in the blanks. Information is
209 obtained from the global "set ..." options and explicitly
210 initialized INFO fields. */
211 extern void gdbarch_info_fill (struct gdbarch_info *info);
213 /* Return the architecture for ABFD. If no suitable architecture
214 could be find, return NULL. */
216 extern struct gdbarch *gdbarch_from_bfd (bfd *abfd);
218 /* Return "current" architecture. If the target is running, this is the
219 architecture of the selected frame. Otherwise, the "current" architecture
220 defaults to the target architecture.
222 This function should normally be called solely by the command interpreter
223 routines to determine the architecture to execute a command in. */
224 extern struct gdbarch *get_current_arch (void);
226 extern int default_has_shared_address_space (struct gdbarch *);
228 extern int default_fast_tracepoint_valid_at (struct gdbarch *gdbarch,
229 CORE_ADDR addr, char **msg);
231 extern void default_gen_return_address (struct gdbarch *gdbarch,
232 struct agent_expr *ax,
233 struct axs_value *value,
236 extern const char *default_auto_charset (void);
237 extern const char *default_auto_wide_charset (void);
239 extern int default_return_in_first_hidden_param_p (struct gdbarch *,
242 extern int default_insn_is_call (struct gdbarch *, CORE_ADDR);
243 extern int default_insn_is_ret (struct gdbarch *, CORE_ADDR);
244 extern int default_insn_is_jump (struct gdbarch *, CORE_ADDR);
246 /* Do-nothing version of vsyscall_range. Returns false. */
248 extern int default_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range);
250 /* Default way to advance the PC to the next instruction in order to
251 skip a permanent breakpoint. Increments the PC by the size of a
252 software breakpoint instruction, as determined with
253 gdbarch_breakpoint_from_pc. This matches how the breakpoints
254 module determines whether a breakpoint is permanent. */
255 extern void default_skip_permanent_breakpoint (struct regcache *regcache);
257 /* Symbols for gdbarch_infcall_mmap; their Linux PROT_* system
258 definitions would be dependent on compilation host. */
259 #define GDB_MMAP_PROT_READ 0x1 /* Page can be read. */
260 #define GDB_MMAP_PROT_WRITE 0x2 /* Page can be written. */
261 #define GDB_MMAP_PROT_EXEC 0x4 /* Page can be executed. */
263 extern CORE_ADDR default_infcall_mmap (CORE_ADDR size, unsigned prot);
264 extern void default_infcall_munmap (CORE_ADDR addr, CORE_ADDR size);
265 extern char *default_gcc_target_options (struct gdbarch *gdbarch);
266 extern const char *default_gnu_triplet_regexp (struct gdbarch *gdbarch);
267 extern int default_addressable_memory_unit_size (struct gdbarch *gdbarch);
269 extern void default_guess_tracepoint_registers (struct gdbarch *gdbarch,
270 struct regcache *regcache,