1 /* Dynamic architecture support for GDB, the GNU debugger. 2 3 Copyright (C) 1998-2013 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 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. 11 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. 16 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/>. */ 19 20 #ifndef GDBARCH_UTILS_H 21 #define GDBARCH_UTILS_H 22 23 struct gdbarch; 24 struct frame_info; 25 struct minimal_symbol; 26 struct type; 27 struct gdbarch_info; 28 29 /* An implementation of gdbarch_displaced_step_copy_insn for 30 processors that don't need to modify the instruction before 31 single-stepping the displaced copy. 32 33 Simply copy gdbarch_max_insn_length (ARCH) bytes from FROM to TO. 34 The closure is an array of that many bytes containing the 35 instruction's bytes, allocated with xmalloc. */ 36 extern struct displaced_step_closure * 37 simple_displaced_step_copy_insn (struct gdbarch *gdbarch, 38 CORE_ADDR from, CORE_ADDR to, 39 struct regcache *regs); 40 41 /* Simple implementation of gdbarch_displaced_step_free_closure: Call 42 xfree. 43 This is appropriate for use with simple_displaced_step_copy_insn. */ 44 extern void 45 simple_displaced_step_free_closure (struct gdbarch *gdbarch, 46 struct displaced_step_closure *closure); 47 48 /* Default implementation of gdbarch_displaced_hw_singlestep. */ 49 extern int 50 default_displaced_step_hw_singlestep (struct gdbarch *, 51 struct displaced_step_closure *); 52 53 /* Possible value for gdbarch_displaced_step_location: 54 Place displaced instructions at the program's entry point, 55 leaving space for inferior function call return breakpoints. */ 56 extern CORE_ADDR displaced_step_at_entry_point (struct gdbarch *gdbarch); 57 58 /* The only possible cases for inner_than. */ 59 extern int core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs); 60 extern int core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs); 61 62 /* Identity functions on a CORE_ADDR. Just return the "addr". */ 63 64 extern CORE_ADDR core_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr); 65 extern gdbarch_convert_from_func_ptr_addr_ftype convert_from_func_ptr_addr_identity; 66 67 /* No-op conversion of reg to regnum. */ 68 69 extern int no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg); 70 71 /* Do nothing version of elf_make_msymbol_special. */ 72 73 void default_elf_make_msymbol_special (asymbol *sym, 74 struct minimal_symbol *msym); 75 76 /* Do nothing version of coff_make_msymbol_special. */ 77 78 void default_coff_make_msymbol_special (int val, struct minimal_symbol *msym); 79 80 /* Version of cannot_fetch_register() / cannot_store_register() that 81 always fails. */ 82 83 int cannot_register_not (struct gdbarch *gdbarch, int regnum); 84 85 /* Legacy version of target_virtual_frame_pointer(). Assumes that 86 there is an gdbarch_deprecated_fp_regnum and that it is the same, cooked or 87 raw. */ 88 89 extern gdbarch_virtual_frame_pointer_ftype legacy_virtual_frame_pointer; 90 91 extern CORE_ADDR generic_skip_trampoline_code (struct frame_info *frame, 92 CORE_ADDR pc); 93 94 extern CORE_ADDR generic_skip_solib_resolver (struct gdbarch *gdbarch, 95 CORE_ADDR pc); 96 97 extern int generic_in_solib_return_trampoline (struct gdbarch *gdbarch, 98 CORE_ADDR pc, const char *name); 99 100 extern int generic_in_function_epilogue_p (struct gdbarch *gdbarch, 101 CORE_ADDR pc); 102 103 /* By default, registers are not convertible. */ 104 extern int generic_convert_register_p (struct gdbarch *gdbarch, int regnum, 105 struct type *type); 106 107 extern int default_stabs_argument_has_addr (struct gdbarch *gdbarch, 108 struct type *type); 109 110 extern int generic_instruction_nullified (struct gdbarch *gdbarch, 111 struct regcache *regcache); 112 113 int default_remote_register_number (struct gdbarch *gdbarch, 114 int regno); 115 116 /* For compatibility with older architectures, returns 117 (LEGACY_SIM_REGNO_IGNORE) when the register doesn't have a valid 118 name. */ 119 120 extern int legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum); 121 122 /* Return the selected byte order, or BFD_ENDIAN_UNKNOWN if no byte 123 order was explicitly selected. */ 124 extern enum bfd_endian selected_byte_order (void); 125 126 /* Return the selected architecture's name, or NULL if no architecture 127 was explicitly selected. */ 128 extern const char *selected_architecture_name (void); 129 130 /* Initialize a ``struct info''. Can't use memset(0) since some 131 default values are not zero. "fill" takes all available 132 information and fills in any unspecified fields. */ 133 134 extern void gdbarch_info_init (struct gdbarch_info *info); 135 136 /* Similar to init, but this time fill in the blanks. Information is 137 obtained from the global "set ..." options and explicitly 138 initialized INFO fields. */ 139 extern void gdbarch_info_fill (struct gdbarch_info *info); 140 141 /* Return the architecture for ABFD. If no suitable architecture 142 could be find, return NULL. */ 143 144 extern struct gdbarch *gdbarch_from_bfd (bfd *abfd); 145 146 /* Return "current" architecture. If the target is running, this is the 147 architecture of the selected frame. Otherwise, the "current" architecture 148 defaults to the target architecture. 149 150 This function should normally be called solely by the command interpreter 151 routines to determine the architecture to execute a command in. */ 152 extern struct gdbarch *get_current_arch (void); 153 154 extern int default_has_shared_address_space (struct gdbarch *); 155 156 extern int default_fast_tracepoint_valid_at (struct gdbarch *gdbarch, 157 CORE_ADDR addr, 158 int *isize, char **msg); 159 160 extern void default_remote_breakpoint_from_pc (struct gdbarch *, 161 CORE_ADDR *pcptr, int *kindptr); 162 163 extern void default_gen_return_address (struct gdbarch *gdbarch, 164 struct agent_expr *ax, 165 struct axs_value *value, 166 CORE_ADDR scope); 167 168 extern const char *default_auto_charset (void); 169 extern const char *default_auto_wide_charset (void); 170 171 extern int default_return_in_first_hidden_param_p (struct gdbarch *, 172 struct type *); 173 #endif 174