/* Dynamic architecture support for GDB, the GNU debugger.
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/* Dynamic architecture support for GDB, the GNU debugger.
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Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
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Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
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2008 Free Software Foundation, Inc.
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2008 Free Software Foundation, Inc.
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This file is part of GDB.
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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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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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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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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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(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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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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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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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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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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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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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "defs.h"
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#include "arch-utils.h"
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#include "arch-utils.h"
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#include "buildsym.h"
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#include "buildsym.h"
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#include "gdbcmd.h"
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#include "gdbcmd.h"
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#include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */
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#include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */
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#include "gdb_string.h"
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#include "gdb_string.h"
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#include "regcache.h"
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#include "regcache.h"
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#include "gdb_assert.h"
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#include "gdb_assert.h"
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#include "sim-regno.h"
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#include "sim-regno.h"
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#include "gdbcore.h"
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#include "gdbcore.h"
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#include "osabi.h"
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#include "osabi.h"
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#include "target-descriptions.h"
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#include "target-descriptions.h"
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#include "version.h"
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#include "version.h"
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#include "floatformat.h"
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#include "floatformat.h"
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int
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int
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legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum)
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legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum)
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{
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{
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/* Only makes sense to supply raw registers. */
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/* Only makes sense to supply raw registers. */
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gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch));
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gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch));
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/* NOTE: cagney/2002-05-13: The old code did it this way and it is
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/* NOTE: cagney/2002-05-13: The old code did it this way and it is
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suspected that some GDB/SIM combinations may rely on this
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suspected that some GDB/SIM combinations may rely on this
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behavour. The default should be one2one_register_sim_regno
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behavour. The default should be one2one_register_sim_regno
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(below). */
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(below). */
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if (gdbarch_register_name (gdbarch, regnum) != NULL
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if (gdbarch_register_name (gdbarch, regnum) != NULL
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&& gdbarch_register_name (gdbarch, regnum)[0] != '\0')
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&& gdbarch_register_name (gdbarch, regnum)[0] != '\0')
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return regnum;
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return regnum;
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else
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else
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return LEGACY_SIM_REGNO_IGNORE;
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return LEGACY_SIM_REGNO_IGNORE;
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}
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}
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CORE_ADDR
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CORE_ADDR
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generic_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
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generic_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
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{
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{
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return 0;
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return 0;
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}
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}
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CORE_ADDR
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CORE_ADDR
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generic_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc)
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generic_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc)
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{
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{
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return 0;
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return 0;
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}
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}
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int
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int
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generic_in_solib_return_trampoline (CORE_ADDR pc, char *name)
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generic_in_solib_return_trampoline (CORE_ADDR pc, char *name)
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{
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{
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return 0;
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return 0;
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}
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}
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int
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int
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generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
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generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
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{
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{
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return 0;
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return 0;
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}
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}
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/* Helper functions for gdbarch_inner_than */
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/* Helper functions for gdbarch_inner_than */
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int
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int
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core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs)
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core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs)
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{
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{
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return (lhs < rhs);
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return (lhs < rhs);
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}
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}
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int
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int
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core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs)
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core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs)
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{
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{
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return (lhs > rhs);
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return (lhs > rhs);
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}
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}
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/* Misc helper functions for targets. */
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/* Misc helper functions for targets. */
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CORE_ADDR
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CORE_ADDR
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core_addr_identity (CORE_ADDR addr)
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core_addr_identity (CORE_ADDR addr)
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{
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{
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return addr;
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return addr;
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}
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}
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CORE_ADDR
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CORE_ADDR
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convert_from_func_ptr_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr,
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convert_from_func_ptr_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr,
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struct target_ops *targ)
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struct target_ops *targ)
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{
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{
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return addr;
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return addr;
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}
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}
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int
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int
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no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg)
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no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg)
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{
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{
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return reg;
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return reg;
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}
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}
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void
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void
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default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym)
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default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym)
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{
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{
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return;
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return;
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}
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}
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void
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void
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default_coff_make_msymbol_special (int val, struct minimal_symbol *msym)
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default_coff_make_msymbol_special (int val, struct minimal_symbol *msym)
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{
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{
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return;
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return;
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}
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}
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int
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int
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cannot_register_not (struct gdbarch *gdbarch, int regnum)
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cannot_register_not (struct gdbarch *gdbarch, int regnum)
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{
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{
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return 0;
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return 0;
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}
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}
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/* Legacy version of target_virtual_frame_pointer(). Assumes that
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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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there is an gdbarch_deprecated_fp_regnum and that it is the same, cooked or
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raw. */
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raw. */
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void
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void
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legacy_virtual_frame_pointer (struct gdbarch *gdbarch,
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legacy_virtual_frame_pointer (struct gdbarch *gdbarch,
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CORE_ADDR pc,
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CORE_ADDR pc,
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int *frame_regnum,
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int *frame_regnum,
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LONGEST *frame_offset)
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LONGEST *frame_offset)
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{
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{
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/* FIXME: cagney/2002-09-13: This code is used when identifying the
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/* FIXME: cagney/2002-09-13: This code is used when identifying the
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frame pointer of the current PC. It is assuming that a single
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frame pointer of the current PC. It is assuming that a single
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register and an offset can determine this. I think it should
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register and an offset can determine this. I think it should
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instead generate a byte code expression as that would work better
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instead generate a byte code expression as that would work better
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with things like Dwarf2's CFI. */
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with things like Dwarf2's CFI. */
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if (gdbarch_deprecated_fp_regnum (gdbarch) >= 0
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if (gdbarch_deprecated_fp_regnum (gdbarch) >= 0
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&& gdbarch_deprecated_fp_regnum (gdbarch)
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&& gdbarch_deprecated_fp_regnum (gdbarch)
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< gdbarch_num_regs (gdbarch))
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< gdbarch_num_regs (gdbarch))
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*frame_regnum = gdbarch_deprecated_fp_regnum (gdbarch);
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*frame_regnum = gdbarch_deprecated_fp_regnum (gdbarch);
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else if (gdbarch_sp_regnum (gdbarch) >= 0
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else if (gdbarch_sp_regnum (gdbarch) >= 0
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&& gdbarch_sp_regnum (gdbarch)
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&& gdbarch_sp_regnum (gdbarch)
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< gdbarch_num_regs (gdbarch))
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< gdbarch_num_regs (gdbarch))
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*frame_regnum = gdbarch_sp_regnum (gdbarch);
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*frame_regnum = gdbarch_sp_regnum (gdbarch);
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else
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else
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/* Should this be an internal error? I guess so, it is reflecting
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/* Should this be an internal error? I guess so, it is reflecting
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an architectural limitation in the current design. */
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an architectural limitation in the current design. */
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internal_error (__FILE__, __LINE__, _("No virtual frame pointer available"));
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internal_error (__FILE__, __LINE__, _("No virtual frame pointer available"));
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*frame_offset = 0;
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*frame_offset = 0;
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}
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}
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int
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int
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generic_convert_register_p (struct gdbarch *gdbarch, int regnum,
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generic_convert_register_p (struct gdbarch *gdbarch, int regnum,
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struct type *type)
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struct type *type)
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{
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{
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return 0;
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return 0;
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}
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}
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int
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int
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default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type)
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default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type)
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{
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{
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return 0;
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return 0;
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}
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}
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int
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int
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generic_instruction_nullified (struct gdbarch *gdbarch,
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generic_instruction_nullified (struct gdbarch *gdbarch,
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struct regcache *regcache)
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struct regcache *regcache)
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{
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{
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return 0;
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return 0;
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}
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}
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int
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int
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default_remote_register_number (struct gdbarch *gdbarch,
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default_remote_register_number (struct gdbarch *gdbarch,
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int regno)
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int regno)
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{
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{
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return regno;
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return regno;
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}
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}
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/* Functions to manipulate the endianness of the target. */
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/* Functions to manipulate the endianness of the target. */
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static int target_byte_order_user = BFD_ENDIAN_UNKNOWN;
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static int target_byte_order_user = BFD_ENDIAN_UNKNOWN;
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static const char endian_big[] = "big";
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static const char endian_big[] = "big";
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static const char endian_little[] = "little";
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static const char endian_little[] = "little";
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static const char endian_auto[] = "auto";
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static const char endian_auto[] = "auto";
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static const char *endian_enum[] =
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static const char *endian_enum[] =
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{
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{
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endian_big,
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endian_big,
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endian_little,
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endian_little,
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endian_auto,
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endian_auto,
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NULL,
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NULL,
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};
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};
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static const char *set_endian_string;
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static const char *set_endian_string;
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enum bfd_endian
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enum bfd_endian
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selected_byte_order (void)
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selected_byte_order (void)
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{
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{
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if (target_byte_order_user != BFD_ENDIAN_UNKNOWN)
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if (target_byte_order_user != BFD_ENDIAN_UNKNOWN)
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return gdbarch_byte_order (current_gdbarch);
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return gdbarch_byte_order (current_gdbarch);
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else
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else
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return BFD_ENDIAN_UNKNOWN;
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return BFD_ENDIAN_UNKNOWN;
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}
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}
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/* Called by ``show endian''. */
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/* Called by ``show endian''. */
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static void
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static void
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show_endian (struct ui_file *file, int from_tty, struct cmd_list_element *c,
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show_endian (struct ui_file *file, int from_tty, struct cmd_list_element *c,
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const char *value)
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const char *value)
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{
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{
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if (target_byte_order_user == BFD_ENDIAN_UNKNOWN)
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if (target_byte_order_user == BFD_ENDIAN_UNKNOWN)
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if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG)
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if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG)
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fprintf_unfiltered (file, _("The target endianness is set automatically "
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fprintf_unfiltered (file, _("The target endianness is set automatically "
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"(currently big endian)\n"));
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"(currently big endian)\n"));
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else
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else
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fprintf_unfiltered (file, _("The target endianness is set automatically "
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fprintf_unfiltered (file, _("The target endianness is set automatically "
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"(currently little endian)\n"));
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"(currently little endian)\n"));
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else
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else
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if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG)
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if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG)
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fprintf_unfiltered (file,
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fprintf_unfiltered (file,
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_("The target is assumed to be big endian\n"));
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_("The target is assumed to be big endian\n"));
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else
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else
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fprintf_unfiltered (file,
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fprintf_unfiltered (file,
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_("The target is assumed to be little endian\n"));
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_("The target is assumed to be little endian\n"));
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}
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}
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static void
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static void
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set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c)
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set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c)
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{
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{
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struct gdbarch_info info;
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struct gdbarch_info info;
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|
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gdbarch_info_init (&info);
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gdbarch_info_init (&info);
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if (set_endian_string == endian_auto)
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if (set_endian_string == endian_auto)
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{
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{
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target_byte_order_user = BFD_ENDIAN_UNKNOWN;
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target_byte_order_user = BFD_ENDIAN_UNKNOWN;
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if (! gdbarch_update_p (info))
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if (! gdbarch_update_p (info))
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internal_error (__FILE__, __LINE__,
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internal_error (__FILE__, __LINE__,
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_("set_endian: architecture update failed"));
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_("set_endian: architecture update failed"));
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}
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}
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else if (set_endian_string == endian_little)
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else if (set_endian_string == endian_little)
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{
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{
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info.byte_order = BFD_ENDIAN_LITTLE;
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info.byte_order = BFD_ENDIAN_LITTLE;
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if (! gdbarch_update_p (info))
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if (! gdbarch_update_p (info))
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printf_unfiltered (_("Little endian target not supported by GDB\n"));
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printf_unfiltered (_("Little endian target not supported by GDB\n"));
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else
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else
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target_byte_order_user = BFD_ENDIAN_LITTLE;
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target_byte_order_user = BFD_ENDIAN_LITTLE;
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}
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}
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else if (set_endian_string == endian_big)
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else if (set_endian_string == endian_big)
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{
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{
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info.byte_order = BFD_ENDIAN_BIG;
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info.byte_order = BFD_ENDIAN_BIG;
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if (! gdbarch_update_p (info))
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if (! gdbarch_update_p (info))
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printf_unfiltered (_("Big endian target not supported by GDB\n"));
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printf_unfiltered (_("Big endian target not supported by GDB\n"));
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else
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else
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target_byte_order_user = BFD_ENDIAN_BIG;
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target_byte_order_user = BFD_ENDIAN_BIG;
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}
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}
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else
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else
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internal_error (__FILE__, __LINE__,
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internal_error (__FILE__, __LINE__,
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_("set_endian: bad value"));
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_("set_endian: bad value"));
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show_endian (gdb_stdout, from_tty, NULL, NULL);
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show_endian (gdb_stdout, from_tty, NULL, NULL);
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}
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}
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/* Given SELECTED, a currently selected BFD architecture, and
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/* Given SELECTED, a currently selected BFD architecture, and
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FROM_TARGET, a BFD architecture reported by the target description,
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FROM_TARGET, a BFD architecture reported by the target description,
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return what architecture to use. Either may be NULL; if both are
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return what architecture to use. Either may be NULL; if both are
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specified, we use the more specific. If the two are obviously
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specified, we use the more specific. If the two are obviously
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incompatible, warn the user. */
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incompatible, warn the user. */
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|
|
static const struct bfd_arch_info *
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static const struct bfd_arch_info *
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choose_architecture_for_target (const struct bfd_arch_info *selected,
|
choose_architecture_for_target (const struct bfd_arch_info *selected,
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const struct bfd_arch_info *from_target)
|
const struct bfd_arch_info *from_target)
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{
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{
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const struct bfd_arch_info *compat1, *compat2;
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const struct bfd_arch_info *compat1, *compat2;
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|
|
if (selected == NULL)
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if (selected == NULL)
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return from_target;
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return from_target;
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|
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if (from_target == NULL)
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if (from_target == NULL)
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return selected;
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return selected;
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|
|
/* struct bfd_arch_info objects are singletons: that is, there's
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/* struct bfd_arch_info objects are singletons: that is, there's
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supposed to be exactly one instance for a given machine. So you
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supposed to be exactly one instance for a given machine. So you
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can tell whether two are equivalent by comparing pointers. */
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can tell whether two are equivalent by comparing pointers. */
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if (from_target == selected)
|
if (from_target == selected)
|
return selected;
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return selected;
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|
|
/* BFD's 'A->compatible (A, B)' functions return zero if A and B are
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/* BFD's 'A->compatible (A, B)' functions return zero if A and B are
|
incompatible. But if they are compatible, it returns the 'more
|
incompatible. But if they are compatible, it returns the 'more
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featureful' of the two arches. That is, if A can run code
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featureful' of the two arches. That is, if A can run code
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written for B, but B can't run code written for A, then it'll
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written for B, but B can't run code written for A, then it'll
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return A.
|
return A.
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|
|
Some targets (e.g. MIPS as of 2006-12-04) don't fully
|
Some targets (e.g. MIPS as of 2006-12-04) don't fully
|
implement this, instead always returning NULL or the first
|
implement this, instead always returning NULL or the first
|
argument. We detect that case by checking both directions. */
|
argument. We detect that case by checking both directions. */
|
|
|
compat1 = selected->compatible (selected, from_target);
|
compat1 = selected->compatible (selected, from_target);
|
compat2 = from_target->compatible (from_target, selected);
|
compat2 = from_target->compatible (from_target, selected);
|
|
|
if (compat1 == NULL && compat2 == NULL)
|
if (compat1 == NULL && compat2 == NULL)
|
{
|
{
|
warning (_("Selected architecture %s is not compatible "
|
warning (_("Selected architecture %s is not compatible "
|
"with reported target architecture %s"),
|
"with reported target architecture %s"),
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selected->printable_name, from_target->printable_name);
|
selected->printable_name, from_target->printable_name);
|
return selected;
|
return selected;
|
}
|
}
|
|
|
if (compat1 == NULL)
|
if (compat1 == NULL)
|
return compat2;
|
return compat2;
|
if (compat2 == NULL)
|
if (compat2 == NULL)
|
return compat1;
|
return compat1;
|
if (compat1 == compat2)
|
if (compat1 == compat2)
|
return compat1;
|
return compat1;
|
|
|
/* If the two didn't match, but one of them was a default architecture,
|
/* If the two didn't match, but one of them was a default architecture,
|
assume the more specific one is correct. This handles the case
|
assume the more specific one is correct. This handles the case
|
where an executable or target description just says "mips", but
|
where an executable or target description just says "mips", but
|
the other knows which MIPS variant. */
|
the other knows which MIPS variant. */
|
if (compat1->the_default)
|
if (compat1->the_default)
|
return compat2;
|
return compat2;
|
if (compat2->the_default)
|
if (compat2->the_default)
|
return compat1;
|
return compat1;
|
|
|
/* We have no idea which one is better. This is a bug, but not
|
/* We have no idea which one is better. This is a bug, but not
|
a critical problem; warn the user. */
|
a critical problem; warn the user. */
|
warning (_("Selected architecture %s is ambiguous with "
|
warning (_("Selected architecture %s is ambiguous with "
|
"reported target architecture %s"),
|
"reported target architecture %s"),
|
selected->printable_name, from_target->printable_name);
|
selected->printable_name, from_target->printable_name);
|
return selected;
|
return selected;
|
}
|
}
|
|
|
/* Functions to manipulate the architecture of the target */
|
/* Functions to manipulate the architecture of the target */
|
|
|
enum set_arch { set_arch_auto, set_arch_manual };
|
enum set_arch { set_arch_auto, set_arch_manual };
|
|
|
static const struct bfd_arch_info *target_architecture_user;
|
static const struct bfd_arch_info *target_architecture_user;
|
|
|
static const char *set_architecture_string;
|
static const char *set_architecture_string;
|
|
|
const char *
|
const char *
|
selected_architecture_name (void)
|
selected_architecture_name (void)
|
{
|
{
|
if (target_architecture_user == NULL)
|
if (target_architecture_user == NULL)
|
return NULL;
|
return NULL;
|
else
|
else
|
return set_architecture_string;
|
return set_architecture_string;
|
}
|
}
|
|
|
/* Called if the user enters ``show architecture'' without an
|
/* Called if the user enters ``show architecture'' without an
|
argument. */
|
argument. */
|
|
|
static void
|
static void
|
show_architecture (struct ui_file *file, int from_tty,
|
show_architecture (struct ui_file *file, int from_tty,
|
struct cmd_list_element *c, const char *value)
|
struct cmd_list_element *c, const char *value)
|
{
|
{
|
const char *arch;
|
const char *arch;
|
arch = gdbarch_bfd_arch_info (current_gdbarch)->printable_name;
|
arch = gdbarch_bfd_arch_info (current_gdbarch)->printable_name;
|
if (target_architecture_user == NULL)
|
if (target_architecture_user == NULL)
|
fprintf_filtered (file, _("\
|
fprintf_filtered (file, _("\
|
The target architecture is set automatically (currently %s)\n"), arch);
|
The target architecture is set automatically (currently %s)\n"), arch);
|
else
|
else
|
fprintf_filtered (file, _("\
|
fprintf_filtered (file, _("\
|
The target architecture is assumed to be %s\n"), arch);
|
The target architecture is assumed to be %s\n"), arch);
|
}
|
}
|
|
|
|
|
/* Called if the user enters ``set architecture'' with or without an
|
/* Called if the user enters ``set architecture'' with or without an
|
argument. */
|
argument. */
|
|
|
static void
|
static void
|
set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c)
|
set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c)
|
{
|
{
|
struct gdbarch_info info;
|
struct gdbarch_info info;
|
|
|
gdbarch_info_init (&info);
|
gdbarch_info_init (&info);
|
|
|
if (strcmp (set_architecture_string, "auto") == 0)
|
if (strcmp (set_architecture_string, "auto") == 0)
|
{
|
{
|
target_architecture_user = NULL;
|
target_architecture_user = NULL;
|
if (!gdbarch_update_p (info))
|
if (!gdbarch_update_p (info))
|
internal_error (__FILE__, __LINE__,
|
internal_error (__FILE__, __LINE__,
|
_("could not select an architecture automatically"));
|
_("could not select an architecture automatically"));
|
}
|
}
|
else
|
else
|
{
|
{
|
info.bfd_arch_info = bfd_scan_arch (set_architecture_string);
|
info.bfd_arch_info = bfd_scan_arch (set_architecture_string);
|
if (info.bfd_arch_info == NULL)
|
if (info.bfd_arch_info == NULL)
|
internal_error (__FILE__, __LINE__,
|
internal_error (__FILE__, __LINE__,
|
_("set_architecture: bfd_scan_arch failed"));
|
_("set_architecture: bfd_scan_arch failed"));
|
if (gdbarch_update_p (info))
|
if (gdbarch_update_p (info))
|
target_architecture_user = info.bfd_arch_info;
|
target_architecture_user = info.bfd_arch_info;
|
else
|
else
|
printf_unfiltered (_("Architecture `%s' not recognized.\n"),
|
printf_unfiltered (_("Architecture `%s' not recognized.\n"),
|
set_architecture_string);
|
set_architecture_string);
|
}
|
}
|
show_architecture (gdb_stdout, from_tty, NULL, NULL);
|
show_architecture (gdb_stdout, from_tty, NULL, NULL);
|
}
|
}
|
|
|
/* Try to select a global architecture that matches "info". Return
|
/* Try to select a global architecture that matches "info". Return
|
non-zero if the attempt succeds. */
|
non-zero if the attempt succeds. */
|
int
|
int
|
gdbarch_update_p (struct gdbarch_info info)
|
gdbarch_update_p (struct gdbarch_info info)
|
{
|
{
|
struct gdbarch *new_gdbarch = gdbarch_find_by_info (info);
|
struct gdbarch *new_gdbarch = gdbarch_find_by_info (info);
|
|
|
/* If there no architecture by that name, reject the request. */
|
/* If there no architecture by that name, reject the request. */
|
if (new_gdbarch == NULL)
|
if (new_gdbarch == NULL)
|
{
|
{
|
if (gdbarch_debug)
|
if (gdbarch_debug)
|
fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: "
|
fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: "
|
"Architecture not found\n");
|
"Architecture not found\n");
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* If it is the same old architecture, accept the request (but don't
|
/* If it is the same old architecture, accept the request (but don't
|
swap anything). */
|
swap anything). */
|
if (new_gdbarch == current_gdbarch)
|
if (new_gdbarch == current_gdbarch)
|
{
|
{
|
if (gdbarch_debug)
|
if (gdbarch_debug)
|
fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: "
|
fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: "
|
"Architecture 0x%08lx (%s) unchanged\n",
|
"Architecture 0x%08lx (%s) unchanged\n",
|
(long) new_gdbarch,
|
(long) new_gdbarch,
|
gdbarch_bfd_arch_info (new_gdbarch)->printable_name);
|
gdbarch_bfd_arch_info (new_gdbarch)->printable_name);
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/* It's a new architecture, swap it in. */
|
/* It's a new architecture, swap it in. */
|
if (gdbarch_debug)
|
if (gdbarch_debug)
|
fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: "
|
fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: "
|
"New architecture 0x%08lx (%s) selected\n",
|
"New architecture 0x%08lx (%s) selected\n",
|
(long) new_gdbarch,
|
(long) new_gdbarch,
|
gdbarch_bfd_arch_info (new_gdbarch)->printable_name);
|
gdbarch_bfd_arch_info (new_gdbarch)->printable_name);
|
deprecated_current_gdbarch_select_hack (new_gdbarch);
|
deprecated_current_gdbarch_select_hack (new_gdbarch);
|
|
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/* Return the architecture for ABFD. If no suitable architecture
|
/* Return the architecture for ABFD. If no suitable architecture
|
could be find, return NULL. */
|
could be find, return NULL. */
|
|
|
struct gdbarch *
|
struct gdbarch *
|
gdbarch_from_bfd (bfd *abfd)
|
gdbarch_from_bfd (bfd *abfd)
|
{
|
{
|
struct gdbarch_info info;
|
struct gdbarch_info info;
|
|
|
/* If we call gdbarch_find_by_info without filling in info.abfd,
|
/* If we call gdbarch_find_by_info without filling in info.abfd,
|
then it will use the global exec_bfd. That's fine if we don't
|
then it will use the global exec_bfd. That's fine if we don't
|
have one of those either. And that's the only time we should
|
have one of those either. And that's the only time we should
|
reach here with a NULL ABFD argument - when we are discarding
|
reach here with a NULL ABFD argument - when we are discarding
|
the executable. */
|
the executable. */
|
gdb_assert (abfd != NULL || exec_bfd == NULL);
|
gdb_assert (abfd != NULL || exec_bfd == NULL);
|
|
|
gdbarch_info_init (&info);
|
gdbarch_info_init (&info);
|
info.abfd = abfd;
|
info.abfd = abfd;
|
return gdbarch_find_by_info (info);
|
return gdbarch_find_by_info (info);
|
}
|
}
|
|
|
/* Set the dynamic target-system-dependent parameters (architecture,
|
/* Set the dynamic target-system-dependent parameters (architecture,
|
byte-order) using information found in the BFD */
|
byte-order) using information found in the BFD */
|
|
|
void
|
void
|
set_gdbarch_from_file (bfd *abfd)
|
set_gdbarch_from_file (bfd *abfd)
|
{
|
{
|
struct gdbarch *gdbarch;
|
struct gdbarch *gdbarch;
|
|
|
gdbarch = gdbarch_from_bfd (abfd);
|
gdbarch = gdbarch_from_bfd (abfd);
|
if (gdbarch == NULL)
|
if (gdbarch == NULL)
|
error (_("Architecture of file not recognized."));
|
error (_("Architecture of file not recognized."));
|
deprecated_current_gdbarch_select_hack (gdbarch);
|
deprecated_current_gdbarch_select_hack (gdbarch);
|
}
|
}
|
|
|
/* Initialize the current architecture. Update the ``set
|
/* Initialize the current architecture. Update the ``set
|
architecture'' command so that it specifies a list of valid
|
architecture'' command so that it specifies a list of valid
|
architectures. */
|
architectures. */
|
|
|
#ifdef DEFAULT_BFD_ARCH
|
#ifdef DEFAULT_BFD_ARCH
|
extern const bfd_arch_info_type DEFAULT_BFD_ARCH;
|
extern const bfd_arch_info_type DEFAULT_BFD_ARCH;
|
static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH;
|
static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH;
|
#else
|
#else
|
static const bfd_arch_info_type *default_bfd_arch;
|
static const bfd_arch_info_type *default_bfd_arch;
|
#endif
|
#endif
|
|
|
#ifdef DEFAULT_BFD_VEC
|
#ifdef DEFAULT_BFD_VEC
|
extern const bfd_target DEFAULT_BFD_VEC;
|
extern const bfd_target DEFAULT_BFD_VEC;
|
static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC;
|
static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC;
|
#else
|
#else
|
static const bfd_target *default_bfd_vec;
|
static const bfd_target *default_bfd_vec;
|
#endif
|
#endif
|
|
|
static int default_byte_order = BFD_ENDIAN_UNKNOWN;
|
static int default_byte_order = BFD_ENDIAN_UNKNOWN;
|
|
|
void
|
void
|
initialize_current_architecture (void)
|
initialize_current_architecture (void)
|
{
|
{
|
const char **arches = gdbarch_printable_names ();
|
const char **arches = gdbarch_printable_names ();
|
|
|
/* determine a default architecture and byte order. */
|
/* determine a default architecture and byte order. */
|
struct gdbarch_info info;
|
struct gdbarch_info info;
|
gdbarch_info_init (&info);
|
gdbarch_info_init (&info);
|
|
|
/* Find a default architecture. */
|
/* Find a default architecture. */
|
if (default_bfd_arch == NULL)
|
if (default_bfd_arch == NULL)
|
{
|
{
|
/* Choose the architecture by taking the first one
|
/* Choose the architecture by taking the first one
|
alphabetically. */
|
alphabetically. */
|
const char *chosen = arches[0];
|
const char *chosen = arches[0];
|
const char **arch;
|
const char **arch;
|
for (arch = arches; *arch != NULL; arch++)
|
for (arch = arches; *arch != NULL; arch++)
|
{
|
{
|
if (strcmp (*arch, chosen) < 0)
|
if (strcmp (*arch, chosen) < 0)
|
chosen = *arch;
|
chosen = *arch;
|
}
|
}
|
if (chosen == NULL)
|
if (chosen == NULL)
|
internal_error (__FILE__, __LINE__,
|
internal_error (__FILE__, __LINE__,
|
_("initialize_current_architecture: No arch"));
|
_("initialize_current_architecture: No arch"));
|
default_bfd_arch = bfd_scan_arch (chosen);
|
default_bfd_arch = bfd_scan_arch (chosen);
|
if (default_bfd_arch == NULL)
|
if (default_bfd_arch == NULL)
|
internal_error (__FILE__, __LINE__,
|
internal_error (__FILE__, __LINE__,
|
_("initialize_current_architecture: Arch not found"));
|
_("initialize_current_architecture: Arch not found"));
|
}
|
}
|
|
|
info.bfd_arch_info = default_bfd_arch;
|
info.bfd_arch_info = default_bfd_arch;
|
|
|
/* Take several guesses at a byte order. */
|
/* Take several guesses at a byte order. */
|
if (default_byte_order == BFD_ENDIAN_UNKNOWN
|
if (default_byte_order == BFD_ENDIAN_UNKNOWN
|
&& default_bfd_vec != NULL)
|
&& default_bfd_vec != NULL)
|
{
|
{
|
/* Extract BFD's default vector's byte order. */
|
/* Extract BFD's default vector's byte order. */
|
switch (default_bfd_vec->byteorder)
|
switch (default_bfd_vec->byteorder)
|
{
|
{
|
case BFD_ENDIAN_BIG:
|
case BFD_ENDIAN_BIG:
|
default_byte_order = BFD_ENDIAN_BIG;
|
default_byte_order = BFD_ENDIAN_BIG;
|
break;
|
break;
|
case BFD_ENDIAN_LITTLE:
|
case BFD_ENDIAN_LITTLE:
|
default_byte_order = BFD_ENDIAN_LITTLE;
|
default_byte_order = BFD_ENDIAN_LITTLE;
|
break;
|
break;
|
default:
|
default:
|
break;
|
break;
|
}
|
}
|
}
|
}
|
if (default_byte_order == BFD_ENDIAN_UNKNOWN)
|
if (default_byte_order == BFD_ENDIAN_UNKNOWN)
|
{
|
{
|
/* look for ``*el-*'' in the target name. */
|
/* look for ``*el-*'' in the target name. */
|
const char *chp;
|
const char *chp;
|
chp = strchr (target_name, '-');
|
chp = strchr (target_name, '-');
|
if (chp != NULL
|
if (chp != NULL
|
&& chp - 2 >= target_name
|
&& chp - 2 >= target_name
|
&& strncmp (chp - 2, "el", 2) == 0)
|
&& strncmp (chp - 2, "el", 2) == 0)
|
default_byte_order = BFD_ENDIAN_LITTLE;
|
default_byte_order = BFD_ENDIAN_LITTLE;
|
}
|
}
|
if (default_byte_order == BFD_ENDIAN_UNKNOWN)
|
if (default_byte_order == BFD_ENDIAN_UNKNOWN)
|
{
|
{
|
/* Wire it to big-endian!!! */
|
/* Wire it to big-endian!!! */
|
default_byte_order = BFD_ENDIAN_BIG;
|
default_byte_order = BFD_ENDIAN_BIG;
|
}
|
}
|
|
|
info.byte_order = default_byte_order;
|
info.byte_order = default_byte_order;
|
|
|
if (! gdbarch_update_p (info))
|
if (! gdbarch_update_p (info))
|
internal_error (__FILE__, __LINE__,
|
internal_error (__FILE__, __LINE__,
|
_("initialize_current_architecture: Selection of "
|
_("initialize_current_architecture: Selection of "
|
"initial architecture failed"));
|
"initial architecture failed"));
|
|
|
/* Create the ``set architecture'' command appending ``auto'' to the
|
/* Create the ``set architecture'' command appending ``auto'' to the
|
list of architectures. */
|
list of architectures. */
|
{
|
{
|
struct cmd_list_element *c;
|
struct cmd_list_element *c;
|
/* Append ``auto''. */
|
/* Append ``auto''. */
|
int nr;
|
int nr;
|
for (nr = 0; arches[nr] != NULL; nr++);
|
for (nr = 0; arches[nr] != NULL; nr++);
|
arches = xrealloc (arches, sizeof (char*) * (nr + 2));
|
arches = xrealloc (arches, sizeof (char*) * (nr + 2));
|
arches[nr + 0] = "auto";
|
arches[nr + 0] = "auto";
|
arches[nr + 1] = NULL;
|
arches[nr + 1] = NULL;
|
add_setshow_enum_cmd ("architecture", class_support,
|
add_setshow_enum_cmd ("architecture", class_support,
|
arches, &set_architecture_string, _("\
|
arches, &set_architecture_string, _("\
|
Set architecture of target."), _("\
|
Set architecture of target."), _("\
|
Show architecture of target."), NULL,
|
Show architecture of target."), NULL,
|
set_architecture, show_architecture,
|
set_architecture, show_architecture,
|
&setlist, &showlist);
|
&setlist, &showlist);
|
add_alias_cmd ("processor", "architecture", class_support, 1, &setlist);
|
add_alias_cmd ("processor", "architecture", class_support, 1, &setlist);
|
}
|
}
|
}
|
}
|
|
|
|
|
/* Initialize a gdbarch info to values that will be automatically
|
/* Initialize a gdbarch info to values that will be automatically
|
overridden. Note: Originally, this ``struct info'' was initialized
|
overridden. Note: Originally, this ``struct info'' was initialized
|
using memset(0). Unfortunately, that ran into problems, namely
|
using memset(0). Unfortunately, that ran into problems, namely
|
BFD_ENDIAN_BIG is zero. An explicit initialization function that
|
BFD_ENDIAN_BIG is zero. An explicit initialization function that
|
can explicitly set each field to a well defined value is used. */
|
can explicitly set each field to a well defined value is used. */
|
|
|
void
|
void
|
gdbarch_info_init (struct gdbarch_info *info)
|
gdbarch_info_init (struct gdbarch_info *info)
|
{
|
{
|
memset (info, 0, sizeof (struct gdbarch_info));
|
memset (info, 0, sizeof (struct gdbarch_info));
|
info->byte_order = BFD_ENDIAN_UNKNOWN;
|
info->byte_order = BFD_ENDIAN_UNKNOWN;
|
info->osabi = GDB_OSABI_UNINITIALIZED;
|
info->osabi = GDB_OSABI_UNINITIALIZED;
|
}
|
}
|
|
|
/* Similar to init, but this time fill in the blanks. Information is
|
/* Similar to init, but this time fill in the blanks. Information is
|
obtained from the global "set ..." options and explicitly
|
obtained from the global "set ..." options and explicitly
|
initialized INFO fields. */
|
initialized INFO fields. */
|
|
|
void
|
void
|
gdbarch_info_fill (struct gdbarch_info *info)
|
gdbarch_info_fill (struct gdbarch_info *info)
|
{
|
{
|
/* Check for the current file. */
|
/* Check for the current file. */
|
if (info->abfd == NULL)
|
if (info->abfd == NULL)
|
info->abfd = exec_bfd;
|
info->abfd = exec_bfd;
|
if (info->abfd == NULL)
|
if (info->abfd == NULL)
|
info->abfd = core_bfd;
|
info->abfd = core_bfd;
|
|
|
/* Check for the current target description. */
|
/* Check for the current target description. */
|
if (info->target_desc == NULL)
|
if (info->target_desc == NULL)
|
info->target_desc = target_current_description ();
|
info->target_desc = target_current_description ();
|
|
|
/* "(gdb) set architecture ...". */
|
/* "(gdb) set architecture ...". */
|
if (info->bfd_arch_info == NULL
|
if (info->bfd_arch_info == NULL
|
&& target_architecture_user)
|
&& target_architecture_user)
|
info->bfd_arch_info = target_architecture_user;
|
info->bfd_arch_info = target_architecture_user;
|
/* From the file. */
|
/* From the file. */
|
if (info->bfd_arch_info == NULL
|
if (info->bfd_arch_info == NULL
|
&& info->abfd != NULL
|
&& info->abfd != NULL
|
&& bfd_get_arch (info->abfd) != bfd_arch_unknown
|
&& bfd_get_arch (info->abfd) != bfd_arch_unknown
|
&& bfd_get_arch (info->abfd) != bfd_arch_obscure)
|
&& bfd_get_arch (info->abfd) != bfd_arch_obscure)
|
info->bfd_arch_info = bfd_get_arch_info (info->abfd);
|
info->bfd_arch_info = bfd_get_arch_info (info->abfd);
|
/* From the target. */
|
/* From the target. */
|
if (info->target_desc != NULL)
|
if (info->target_desc != NULL)
|
info->bfd_arch_info = choose_architecture_for_target
|
info->bfd_arch_info = choose_architecture_for_target
|
(info->bfd_arch_info, tdesc_architecture (info->target_desc));
|
(info->bfd_arch_info, tdesc_architecture (info->target_desc));
|
/* From the default. */
|
/* From the default. */
|
if (info->bfd_arch_info == NULL)
|
if (info->bfd_arch_info == NULL)
|
info->bfd_arch_info = default_bfd_arch;
|
info->bfd_arch_info = default_bfd_arch;
|
|
|
/* "(gdb) set byte-order ...". */
|
/* "(gdb) set byte-order ...". */
|
if (info->byte_order == BFD_ENDIAN_UNKNOWN
|
if (info->byte_order == BFD_ENDIAN_UNKNOWN
|
&& target_byte_order_user != BFD_ENDIAN_UNKNOWN)
|
&& target_byte_order_user != BFD_ENDIAN_UNKNOWN)
|
info->byte_order = target_byte_order_user;
|
info->byte_order = target_byte_order_user;
|
/* From the INFO struct. */
|
/* From the INFO struct. */
|
if (info->byte_order == BFD_ENDIAN_UNKNOWN
|
if (info->byte_order == BFD_ENDIAN_UNKNOWN
|
&& info->abfd != NULL)
|
&& info->abfd != NULL)
|
info->byte_order = (bfd_big_endian (info->abfd) ? BFD_ENDIAN_BIG
|
info->byte_order = (bfd_big_endian (info->abfd) ? BFD_ENDIAN_BIG
|
: bfd_little_endian (info->abfd) ? BFD_ENDIAN_LITTLE
|
: bfd_little_endian (info->abfd) ? BFD_ENDIAN_LITTLE
|
: BFD_ENDIAN_UNKNOWN);
|
: BFD_ENDIAN_UNKNOWN);
|
/* From the default. */
|
/* From the default. */
|
if (info->byte_order == BFD_ENDIAN_UNKNOWN)
|
if (info->byte_order == BFD_ENDIAN_UNKNOWN)
|
info->byte_order = default_byte_order;
|
info->byte_order = default_byte_order;
|
|
|
/* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */
|
/* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */
|
if (info->osabi == GDB_OSABI_UNINITIALIZED)
|
if (info->osabi == GDB_OSABI_UNINITIALIZED)
|
info->osabi = gdbarch_lookup_osabi (info->abfd);
|
info->osabi = gdbarch_lookup_osabi (info->abfd);
|
|
|
/* Must have at least filled in the architecture. */
|
/* Must have at least filled in the architecture. */
|
gdb_assert (info->bfd_arch_info != NULL);
|
gdb_assert (info->bfd_arch_info != NULL);
|
}
|
}
|
|
|
/* */
|
/* */
|
|
|
extern initialize_file_ftype _initialize_gdbarch_utils; /* -Wmissing-prototypes */
|
extern initialize_file_ftype _initialize_gdbarch_utils; /* -Wmissing-prototypes */
|
|
|
void
|
void
|
_initialize_gdbarch_utils (void)
|
_initialize_gdbarch_utils (void)
|
{
|
{
|
struct cmd_list_element *c;
|
struct cmd_list_element *c;
|
add_setshow_enum_cmd ("endian", class_support,
|
add_setshow_enum_cmd ("endian", class_support,
|
endian_enum, &set_endian_string, _("\
|
endian_enum, &set_endian_string, _("\
|
Set endianness of target."), _("\
|
Set endianness of target."), _("\
|
Show endianness of target."), NULL,
|
Show endianness of target."), NULL,
|
set_endian, show_endian,
|
set_endian, show_endian,
|
&setlist, &showlist);
|
&setlist, &showlist);
|
}
|
}
|
|
|
