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https://github.com/darlinghq/darling-gdb.git
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124 lines
3.9 KiB
C
124 lines
3.9 KiB
C
/* Target-dependent code for NetBSD/arm.
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Copyright (C) 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011
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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 "gdb_string.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 char arm_nbsd_arm_le_breakpoint[] = {0x11, 0x00, 0x00, 0xe6};
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static const char arm_nbsd_arm_be_breakpoint[] = {0xe6, 0x00, 0x00, 0x11};
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static const char arm_nbsd_thumb_le_breakpoint[] = {0xfe, 0xde};
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static const char 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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