1 /* Dynamic architecture support for GDB, the GNU debugger. 2 3 Copyright (C) 1998, 1999, 2000, 2002, 2003, 2004, 2007, 2008, 2009, 2010, 4 2011 Free Software Foundation, Inc. 5 6 This file is part of GDB. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 20 21 #ifndef GDBARCH_UTILS_H 22 #define GDBARCH_UTILS_H 23 24 struct gdbarch; 25 struct frame_info; 26 struct minimal_symbol; 27 struct type; 28 struct gdbarch_info; 29 30 /* gdbarch trace variable */ 31 extern int gdbarch_debug; 32 33 /* An implementation of gdbarch_displaced_step_copy_insn for 34 processors that don't need to modify the instruction before 35 single-stepping the displaced copy. 36 37 Simply copy gdbarch_max_insn_length (ARCH) bytes from FROM to TO. 38 The closure is an array of that many bytes containing the 39 instruction's bytes, allocated with xmalloc. */ 40 extern struct displaced_step_closure * 41 simple_displaced_step_copy_insn (struct gdbarch *gdbarch, 42 CORE_ADDR from, CORE_ADDR to, 43 struct regcache *regs); 44 45 /* Simple implementation of gdbarch_displaced_step_free_closure: Call 46 xfree. 47 This is appropriate for use with simple_displaced_step_copy_insn. */ 48 extern void 49 simple_displaced_step_free_closure (struct gdbarch *gdbarch, 50 struct displaced_step_closure *closure); 51 52 /* Default implementation of gdbarch_displaced_hw_singlestep. */ 53 extern int 54 default_displaced_step_hw_singlestep (struct gdbarch *, 55 struct displaced_step_closure *); 56 57 /* Possible value for gdbarch_displaced_step_location: 58 Place displaced instructions at the program's entry point, 59 leaving space for inferior function call return breakpoints. */ 60 extern CORE_ADDR displaced_step_at_entry_point (struct gdbarch *gdbarch); 61 62 /* The only possible cases for inner_than. */ 63 extern int core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs); 64 extern int core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs); 65 66 /* Identity functions on a CORE_ADDR. Just return the "addr". */ 67 68 extern CORE_ADDR core_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr); 69 extern gdbarch_convert_from_func_ptr_addr_ftype convert_from_func_ptr_addr_identity; 70 71 /* No-op conversion of reg to regnum. */ 72 73 extern int no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg); 74 75 /* Do nothing version of elf_make_msymbol_special. */ 76 77 void default_elf_make_msymbol_special (asymbol *sym, 78 struct minimal_symbol *msym); 79 80 /* Do nothing version of coff_make_msymbol_special. */ 81 82 void default_coff_make_msymbol_special (int val, struct minimal_symbol *msym); 83 84 /* Version of cannot_fetch_register() / cannot_store_register() that 85 always fails. */ 86 87 int cannot_register_not (struct gdbarch *gdbarch, int regnum); 88 89 /* Legacy version of target_virtual_frame_pointer(). Assumes that 90 there is an gdbarch_deprecated_fp_regnum and that it is the same, cooked or 91 raw. */ 92 93 extern gdbarch_virtual_frame_pointer_ftype legacy_virtual_frame_pointer; 94 95 extern CORE_ADDR generic_skip_trampoline_code (struct frame_info *frame, 96 CORE_ADDR pc); 97 98 extern CORE_ADDR generic_skip_solib_resolver (struct gdbarch *gdbarch, 99 CORE_ADDR pc); 100 101 extern int generic_in_solib_return_trampoline (struct gdbarch *gdbarch, 102 CORE_ADDR pc, char *name); 103 104 extern int generic_in_function_epilogue_p (struct gdbarch *gdbarch, 105 CORE_ADDR pc); 106 107 /* By default, registers are not convertible. */ 108 extern int generic_convert_register_p (struct gdbarch *gdbarch, int regnum, 109 struct type *type); 110 111 extern int default_stabs_argument_has_addr (struct gdbarch *gdbarch, 112 struct type *type); 113 114 extern int generic_instruction_nullified (struct gdbarch *gdbarch, 115 struct regcache *regcache); 116 117 int default_remote_register_number (struct gdbarch *gdbarch, 118 int regno); 119 120 /* For compatibility with older architectures, returns 121 (LEGACY_SIM_REGNO_IGNORE) when the register doesn't have a valid 122 name. */ 123 124 extern int legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum); 125 126 /* Return the selected byte order, or BFD_ENDIAN_UNKNOWN if no byte 127 order was explicitly selected. */ 128 extern enum bfd_endian selected_byte_order (void); 129 130 /* Return the selected architecture's name, or NULL if no architecture 131 was explicitly selected. */ 132 extern const char *selected_architecture_name (void); 133 134 /* Initialize a ``struct info''. Can't use memset(0) since some 135 default values are not zero. "fill" takes all available 136 information and fills in any unspecified fields. */ 137 138 extern void gdbarch_info_init (struct gdbarch_info *info); 139 140 /* Similar to init, but this time fill in the blanks. Information is 141 obtained from the global "set ..." options and explicitly 142 initialized INFO fields. */ 143 extern void gdbarch_info_fill (struct gdbarch_info *info); 144 145 /* Return the architecture for ABFD. If no suitable architecture 146 could be find, return NULL. */ 147 148 extern struct gdbarch *gdbarch_from_bfd (bfd *abfd); 149 150 /* Return "current" architecture. If the target is running, this is the 151 architecture of the selected frame. Otherwise, the "current" architecture 152 defaults to the target architecture. 153 154 This function should normally be called solely by the command interpreter 155 routines to determine the architecture to execute a command in. */ 156 extern struct gdbarch *get_current_arch (void); 157 158 extern int default_has_shared_address_space (struct gdbarch *); 159 160 extern int default_fast_tracepoint_valid_at (struct gdbarch *gdbarch, 161 CORE_ADDR addr, 162 int *isize, char **msg); 163 164 extern void default_remote_breakpoint_from_pc (struct gdbarch *, 165 CORE_ADDR *pcptr, int *kindptr); 166 167 extern const char *default_auto_charset (void); 168 extern const char *default_auto_wide_charset (void); 169 170 #endif 171