| 1 | /* Dynamic architecture support for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1998, 1999, 2000, 2002, 2003, 2004, 2007, 2008, 2009 |
| 4 | 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 | /* Possible value for gdbarch_displaced_step_location: |
| 53 | Place displaced instructions at the program's entry point, |
| 54 | leaving space for inferior function call return breakpoints. */ |
| 55 | extern CORE_ADDR displaced_step_at_entry_point (struct gdbarch *gdbarch); |
| 56 | |
| 57 | /* The only possible cases for inner_than. */ |
| 58 | extern int core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs); |
| 59 | extern int core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs); |
| 60 | |
| 61 | /* Identity functions on a CORE_ADDR. Just return the "addr". */ |
| 62 | |
| 63 | extern CORE_ADDR core_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr); |
| 64 | extern gdbarch_convert_from_func_ptr_addr_ftype convert_from_func_ptr_addr_identity; |
| 65 | |
| 66 | /* No-op conversion of reg to regnum. */ |
| 67 | |
| 68 | extern int no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg); |
| 69 | |
| 70 | /* Do nothing version of elf_make_msymbol_special. */ |
| 71 | |
| 72 | void default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym); |
| 73 | |
| 74 | /* Do nothing version of coff_make_msymbol_special. */ |
| 75 | |
| 76 | void default_coff_make_msymbol_special (int val, struct minimal_symbol *msym); |
| 77 | |
| 78 | /* Version of cannot_fetch_register() / cannot_store_register() that |
| 79 | always fails. */ |
| 80 | |
| 81 | int cannot_register_not (struct gdbarch *gdbarch, int regnum); |
| 82 | |
| 83 | /* Legacy version of target_virtual_frame_pointer(). Assumes that |
| 84 | there is an gdbarch_deprecated_fp_regnum and that it is the same, cooked or |
| 85 | raw. */ |
| 86 | |
| 87 | extern gdbarch_virtual_frame_pointer_ftype legacy_virtual_frame_pointer; |
| 88 | |
| 89 | extern CORE_ADDR generic_skip_trampoline_code (struct frame_info *frame, |
| 90 | CORE_ADDR pc); |
| 91 | |
| 92 | extern CORE_ADDR generic_skip_solib_resolver (struct gdbarch *gdbarch, |
| 93 | CORE_ADDR pc); |
| 94 | |
| 95 | extern int generic_in_solib_return_trampoline (CORE_ADDR pc, char *name); |
| 96 | |
| 97 | extern int generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc); |
| 98 | |
| 99 | /* By default, registers are not convertible. */ |
| 100 | extern int generic_convert_register_p (struct gdbarch *gdbarch, int regnum, |
| 101 | struct type *type); |
| 102 | |
| 103 | extern int default_stabs_argument_has_addr (struct gdbarch *gdbarch, |
| 104 | struct type *type); |
| 105 | |
| 106 | extern int generic_instruction_nullified (struct gdbarch *gdbarch, |
| 107 | struct regcache *regcache); |
| 108 | |
| 109 | int default_remote_register_number (struct gdbarch *gdbarch, |
| 110 | int regno); |
| 111 | |
| 112 | /* For compatibility with older architectures, returns |
| 113 | (LEGACY_SIM_REGNO_IGNORE) when the register doesn't have a valid |
| 114 | name. */ |
| 115 | |
| 116 | extern int legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum); |
| 117 | |
| 118 | /* Return the selected byte order, or BFD_ENDIAN_UNKNOWN if no byte |
| 119 | order was explicitly selected. */ |
| 120 | extern enum bfd_endian selected_byte_order (void); |
| 121 | |
| 122 | /* Return the selected architecture's name, or NULL if no architecture |
| 123 | was explicitly selected. */ |
| 124 | extern const char *selected_architecture_name (void); |
| 125 | |
| 126 | /* Initialize a ``struct info''. Can't use memset(0) since some |
| 127 | default values are not zero. "fill" takes all available |
| 128 | information and fills in any unspecified fields. */ |
| 129 | |
| 130 | extern void gdbarch_info_init (struct gdbarch_info *info); |
| 131 | |
| 132 | /* Similar to init, but this time fill in the blanks. Information is |
| 133 | obtained from the global "set ..." options and explicitly |
| 134 | initialized INFO fields. */ |
| 135 | extern void gdbarch_info_fill (struct gdbarch_info *info); |
| 136 | |
| 137 | /* Return the architecture for ABFD. If no suitable architecture |
| 138 | could be find, return NULL. */ |
| 139 | |
| 140 | extern struct gdbarch *gdbarch_from_bfd (bfd *abfd); |
| 141 | |
| 142 | #endif |