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271 lines
9.5 KiB
C++
271 lines
9.5 KiB
C++
/* Dynamic architecture support for GDB, the GNU debugger.
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Copyright (C) 1998-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef GDBARCH_UTILS_H
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#define GDBARCH_UTILS_H
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struct gdbarch;
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struct frame_info;
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struct minimal_symbol;
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struct type;
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struct gdbarch_info;
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template <size_t bp_size, const gdb_byte *break_insn>
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struct bp_manipulation
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{
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static int
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kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr)
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{
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return bp_size;
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}
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static const gdb_byte *
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bp_from_kind (struct gdbarch *gdbarch, int kind, int *size)
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{
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*size = kind;
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return break_insn;
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}
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};
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template <size_t bp_size,
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const gdb_byte *break_insn_little,
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const gdb_byte *break_insn_big>
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struct bp_manipulation_endian
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{
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static int
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kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr)
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{
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return bp_size;
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}
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static const gdb_byte *
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bp_from_kind (struct gdbarch *gdbarch, int kind, int *size)
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{
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*size = kind;
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if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
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return break_insn_big;
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else
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return break_insn_little;
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}
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};
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#define BP_MANIPULATION(BREAK_INSN) \
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bp_manipulation<sizeof (BREAK_INSN), BREAK_INSN>
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#define BP_MANIPULATION_ENDIAN(BREAK_INSN_LITTLE, BREAK_INSN_BIG) \
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bp_manipulation_endian<sizeof (BREAK_INSN_LITTLE), \
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BREAK_INSN_LITTLE, BREAK_INSN_BIG>
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/* An implementation of gdbarch_displaced_step_copy_insn for
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processors that don't need to modify the instruction before
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single-stepping the displaced copy.
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Simply copy gdbarch_max_insn_length (ARCH) bytes from FROM to TO.
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The closure is an array of that many bytes containing the
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instruction's bytes, allocated with xmalloc. */
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extern struct displaced_step_closure *
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simple_displaced_step_copy_insn (struct gdbarch *gdbarch,
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CORE_ADDR from, CORE_ADDR to,
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struct regcache *regs);
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/* Simple implementation of gdbarch_displaced_step_free_closure: Call
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xfree.
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This is appropriate for use with simple_displaced_step_copy_insn. */
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extern void
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simple_displaced_step_free_closure (struct gdbarch *gdbarch,
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struct displaced_step_closure *closure);
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/* Default implementation of gdbarch_displaced_hw_singlestep. */
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extern int
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default_displaced_step_hw_singlestep (struct gdbarch *,
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struct displaced_step_closure *);
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/* Possible value for gdbarch_displaced_step_location:
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Place displaced instructions at the program's entry point,
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leaving space for inferior function call return breakpoints. */
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extern CORE_ADDR displaced_step_at_entry_point (struct gdbarch *gdbarch);
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/* The only possible cases for inner_than. */
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extern int core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs);
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extern int core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs);
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/* Identity functions on a CORE_ADDR. Just return the "addr". */
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extern CORE_ADDR core_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr);
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extern gdbarch_convert_from_func_ptr_addr_ftype convert_from_func_ptr_addr_identity;
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/* No-op conversion of reg to regnum. */
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extern int no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg);
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/* Do nothing version of coff_make_msymbol_special. */
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void default_coff_make_msymbol_special (int val, struct minimal_symbol *msym);
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/* Do nothing default implementation of gdbarch_make_symbol_special. */
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void default_make_symbol_special (struct symbol *sym, struct objfile *objfile);
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/* Do nothing default implementation of gdbarch_adjust_dwarf2_addr. */
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CORE_ADDR default_adjust_dwarf2_addr (CORE_ADDR pc);
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/* Do nothing default implementation of gdbarch_adjust_dwarf2_line. */
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CORE_ADDR default_adjust_dwarf2_line (CORE_ADDR addr, int rel);
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/* Version of cannot_fetch_register() / cannot_store_register() that
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always fails. */
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int cannot_register_not (struct gdbarch *gdbarch, int regnum);
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/* Legacy version of target_virtual_frame_pointer(). Assumes that
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there is an gdbarch_deprecated_fp_regnum and that it is the same, cooked or
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raw. */
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extern gdbarch_virtual_frame_pointer_ftype legacy_virtual_frame_pointer;
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/* Default implementation of gdbarch_floatformat_for_type. */
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extern const struct floatformat **
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default_floatformat_for_type (struct gdbarch *gdbarch,
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const char *name, int len);
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extern CORE_ADDR generic_skip_trampoline_code (struct frame_info *frame,
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CORE_ADDR pc);
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extern CORE_ADDR generic_skip_solib_resolver (struct gdbarch *gdbarch,
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CORE_ADDR pc);
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extern int generic_in_solib_return_trampoline (struct gdbarch *gdbarch,
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CORE_ADDR pc, const char *name);
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extern int generic_stack_frame_destroyed_p (struct gdbarch *gdbarch,
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CORE_ADDR pc);
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extern int default_code_of_frame_writable (struct gdbarch *gdbarch,
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struct frame_info *frame);
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/* By default, registers are not convertible. */
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extern int generic_convert_register_p (struct gdbarch *gdbarch, int regnum,
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struct type *type);
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extern int default_stabs_argument_has_addr (struct gdbarch *gdbarch,
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struct type *type);
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extern int generic_instruction_nullified (struct gdbarch *gdbarch,
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struct regcache *regcache);
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int default_remote_register_number (struct gdbarch *gdbarch,
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int regno);
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/* For compatibility with older architectures, returns
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(LEGACY_SIM_REGNO_IGNORE) when the register doesn't have a valid
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name. */
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extern int legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum);
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/* Return the selected byte order, or BFD_ENDIAN_UNKNOWN if no byte
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order was explicitly selected. */
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extern enum bfd_endian selected_byte_order (void);
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/* Return the selected architecture's name, or NULL if no architecture
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was explicitly selected. */
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extern const char *selected_architecture_name (void);
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/* Initialize a ``struct info''. Can't use memset(0) since some
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default values are not zero. "fill" takes all available
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information and fills in any unspecified fields. */
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extern void gdbarch_info_init (struct gdbarch_info *info);
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/* Similar to init, but this time fill in the blanks. Information is
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obtained from the global "set ..." options and explicitly
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initialized INFO fields. */
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extern void gdbarch_info_fill (struct gdbarch_info *info);
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/* Return the architecture for ABFD. If no suitable architecture
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could be find, return NULL. */
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extern struct gdbarch *gdbarch_from_bfd (bfd *abfd);
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/* Return "current" architecture. If the target is running, this is the
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architecture of the selected frame. Otherwise, the "current" architecture
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defaults to the target architecture.
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This function should normally be called solely by the command interpreter
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routines to determine the architecture to execute a command in. */
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extern struct gdbarch *get_current_arch (void);
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extern int default_has_shared_address_space (struct gdbarch *);
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extern int default_fast_tracepoint_valid_at (struct gdbarch *gdbarch,
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CORE_ADDR addr, char **msg);
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extern const gdb_byte *default_breakpoint_from_pc (struct gdbarch *gdbarch,
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CORE_ADDR *pcptr,
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int *lenptr);
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extern int default_breakpoint_kind_from_current_state (struct gdbarch *gdbarch,
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struct regcache *regcache,
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CORE_ADDR *pcptr);
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extern void default_gen_return_address (struct gdbarch *gdbarch,
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struct agent_expr *ax,
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struct axs_value *value,
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CORE_ADDR scope);
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extern const char *default_auto_charset (void);
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extern const char *default_auto_wide_charset (void);
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extern int default_return_in_first_hidden_param_p (struct gdbarch *,
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struct type *);
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extern int default_insn_is_call (struct gdbarch *, CORE_ADDR);
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extern int default_insn_is_ret (struct gdbarch *, CORE_ADDR);
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extern int default_insn_is_jump (struct gdbarch *, CORE_ADDR);
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/* Do-nothing version of vsyscall_range. Returns false. */
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extern int default_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range);
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/* Default way to advance the PC to the next instruction in order to
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skip a permanent breakpoint. Increments the PC by the size of a
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software breakpoint instruction, as determined with
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gdbarch_breakpoint_from_pc. This matches how the breakpoints
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module determines whether a breakpoint is permanent. */
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extern void default_skip_permanent_breakpoint (struct regcache *regcache);
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/* Symbols for gdbarch_infcall_mmap; their Linux PROT_* system
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definitions would be dependent on compilation host. */
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#define GDB_MMAP_PROT_READ 0x1 /* Page can be read. */
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#define GDB_MMAP_PROT_WRITE 0x2 /* Page can be written. */
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#define GDB_MMAP_PROT_EXEC 0x4 /* Page can be executed. */
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extern CORE_ADDR default_infcall_mmap (CORE_ADDR size, unsigned prot);
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extern void default_infcall_munmap (CORE_ADDR addr, CORE_ADDR size);
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extern char *default_gcc_target_options (struct gdbarch *gdbarch);
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extern const char *default_gnu_triplet_regexp (struct gdbarch *gdbarch);
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extern int default_addressable_memory_unit_size (struct gdbarch *gdbarch);
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extern void default_guess_tracepoint_registers (struct gdbarch *gdbarch,
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struct regcache *regcache,
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CORE_ADDR addr);
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#endif
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