cba7e83fda
This patch is in preparation for software single stepping support on ARM
it shares some functions and definitions that will be needed.
No regressions, tested on ubuntu 14.04 ARMv7 and x86.
With gdbserver-{native,extended} / { -marm -mthumb }
Not tested: wince/bsd build.
gdb/ChangeLog:
* arch/arm.c (bitcount): Move from arm-tdep.c.
(condition_true): Likewise.
* arch/arm.h (Instruction Definitions): Move form arm-tdep.h.
(condition_true): Move defenition from arm-tdep.h.
(bitcount): Likewise.
* arm-tdep.c (condition_true): Move to arch/arm.c.
(bitcount): Likewise.
* arm-tdep.h (Instruction Definitions): Move to arch/arm.h.
* arm-wince-tdep.c: Include arch/arm.h.
* armnbsd-tdep.c: Likewise.
121 lines
3.9 KiB
C
121 lines
3.9 KiB
C
/* Target-dependent code for NetBSD/arm.
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Copyright (C) 2002-2015 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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#include "defs.h"
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#include "osabi.h"
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#include "arch/arm.h"
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#include "arm-tdep.h"
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#include "solib-svr4.h"
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/* Description of the longjmp buffer. */
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#define ARM_NBSD_JB_PC 24
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#define ARM_NBSD_JB_ELEMENT_SIZE INT_REGISTER_SIZE
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/* For compatibility with previous implemenations of GDB on arm/NetBSD,
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override the default little-endian breakpoint. */
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static const gdb_byte arm_nbsd_arm_le_breakpoint[] = {0x11, 0x00, 0x00, 0xe6};
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static const gdb_byte arm_nbsd_arm_be_breakpoint[] = {0xe6, 0x00, 0x00, 0x11};
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static const gdb_byte arm_nbsd_thumb_le_breakpoint[] = {0xfe, 0xde};
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static const gdb_byte arm_nbsd_thumb_be_breakpoint[] = {0xde, 0xfe};
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static void
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arm_netbsd_init_abi_common (struct gdbarch_info info,
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struct gdbarch *gdbarch)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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tdep->lowest_pc = 0x8000;
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switch (info.byte_order)
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{
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case BFD_ENDIAN_LITTLE:
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tdep->arm_breakpoint = arm_nbsd_arm_le_breakpoint;
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tdep->thumb_breakpoint = arm_nbsd_thumb_le_breakpoint;
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tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_le_breakpoint);
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tdep->thumb_breakpoint_size = sizeof (arm_nbsd_thumb_le_breakpoint);
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break;
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case BFD_ENDIAN_BIG:
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tdep->arm_breakpoint = arm_nbsd_arm_be_breakpoint;
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tdep->thumb_breakpoint = arm_nbsd_thumb_be_breakpoint;
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tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_be_breakpoint);
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tdep->thumb_breakpoint_size = sizeof (arm_nbsd_thumb_be_breakpoint);
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break;
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default:
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internal_error (__FILE__, __LINE__,
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_("arm_gdbarch_init: bad byte order for float format"));
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}
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tdep->jb_pc = ARM_NBSD_JB_PC;
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tdep->jb_elt_size = ARM_NBSD_JB_ELEMENT_SIZE;
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/* Single stepping. */
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set_gdbarch_software_single_step (gdbarch, arm_software_single_step);
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}
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static void
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arm_netbsd_aout_init_abi (struct gdbarch_info info,
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struct gdbarch *gdbarch)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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arm_netbsd_init_abi_common (info, gdbarch);
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if (tdep->fp_model == ARM_FLOAT_AUTO)
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tdep->fp_model = ARM_FLOAT_SOFT_FPA;
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}
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static void
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arm_netbsd_elf_init_abi (struct gdbarch_info info,
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struct gdbarch *gdbarch)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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arm_netbsd_init_abi_common (info, gdbarch);
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if (tdep->fp_model == ARM_FLOAT_AUTO)
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tdep->fp_model = ARM_FLOAT_SOFT_VFP;
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/* NetBSD ELF uses SVR4-style shared libraries. */
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set_solib_svr4_fetch_link_map_offsets
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(gdbarch, svr4_ilp32_fetch_link_map_offsets);
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}
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static enum gdb_osabi
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arm_netbsd_aout_osabi_sniffer (bfd *abfd)
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{
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if (strcmp (bfd_get_target (abfd), "a.out-arm-netbsd") == 0)
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return GDB_OSABI_NETBSD_AOUT;
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return GDB_OSABI_UNKNOWN;
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}
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/* Provide a prototype to silence -Wmissing-prototypes. */
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extern initialize_file_ftype _initialize_arm_netbsd_tdep;
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void
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_initialize_arm_netbsd_tdep (void)
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{
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gdbarch_register_osabi_sniffer (bfd_arch_arm, bfd_target_aout_flavour,
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arm_netbsd_aout_osabi_sniffer);
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gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_AOUT,
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arm_netbsd_aout_init_abi);
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gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_ELF,
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arm_netbsd_elf_init_abi);
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}
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