1/* Target-dependent code for NetBSD/arm. 2 3 Copyright (C) 2002, 2003, 2004, 2006, 2007 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20#include "defs.h" 21#include "osabi.h" 22 23#include "gdb_string.h" 24 25#include "arm-tdep.h" 26#include "solib-svr4.h" 27 28/* Description of the longjmp buffer. */ 29#define ARM_NBSD_JB_PC 24 30#define ARM_NBSD_JB_ELEMENT_SIZE INT_REGISTER_SIZE 31 32/* For compatibility with previous implemenations of GDB on arm/NetBSD, 33 override the default little-endian breakpoint. */ 34static const char arm_nbsd_arm_le_breakpoint[] = {0x11, 0x00, 0x00, 0xe6}; 35static const char arm_nbsd_arm_be_breakpoint[] = {0xe6, 0x00, 0x00, 0x11}; 36static const char arm_nbsd_thumb_le_breakpoint[] = {0xfe, 0xde}; 37static const char arm_nbsd_thumb_be_breakpoint[] = {0xde, 0xfe}; 38 39static void 40arm_netbsd_init_abi_common (struct gdbarch_info info, 41 struct gdbarch *gdbarch) 42{ 43 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 44 45 tdep->lowest_pc = 0x8000; 46 switch (info.byte_order) 47 { 48 case BFD_ENDIAN_LITTLE: 49 tdep->arm_breakpoint = arm_nbsd_arm_le_breakpoint; 50 tdep->thumb_breakpoint = arm_nbsd_thumb_le_breakpoint; 51 tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_le_breakpoint); 52 tdep->thumb_breakpoint_size = sizeof (arm_nbsd_thumb_le_breakpoint); 53 break; 54 55 case BFD_ENDIAN_BIG: 56 tdep->arm_breakpoint = arm_nbsd_arm_be_breakpoint; 57 tdep->thumb_breakpoint = arm_nbsd_thumb_be_breakpoint; 58 tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_be_breakpoint); 59 tdep->thumb_breakpoint_size = sizeof (arm_nbsd_thumb_be_breakpoint); 60 break; 61 62 default: 63 internal_error (__FILE__, __LINE__, 64 _("arm_gdbarch_init: bad byte order for float format")); 65 } 66 67 tdep->jb_pc = ARM_NBSD_JB_PC; 68 tdep->jb_elt_size = ARM_NBSD_JB_ELEMENT_SIZE; 69 70 /* Single stepping. */ 71 set_gdbarch_software_single_step (gdbarch, arm_software_single_step); 72} 73 74static void 75arm_netbsd_aout_init_abi (struct gdbarch_info info, 76 struct gdbarch *gdbarch) 77{ 78 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 79 80 arm_netbsd_init_abi_common (info, gdbarch); 81 if (tdep->fp_model == ARM_FLOAT_AUTO) 82 tdep->fp_model = ARM_FLOAT_SOFT_FPA; 83} 84 85static void 86arm_netbsd_elf_init_abi (struct gdbarch_info info, 87 struct gdbarch *gdbarch) 88{ 89 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 90 91 arm_netbsd_init_abi_common (info, gdbarch); 92 if (tdep->fp_model == ARM_FLOAT_AUTO) 93 tdep->fp_model = ARM_FLOAT_SOFT_VFP; 94 95 /* NetBSD ELF uses SVR4-style shared libraries. */ 96 set_solib_svr4_fetch_link_map_offsets 97 (gdbarch, svr4_ilp32_fetch_link_map_offsets); 98} 99 100static enum gdb_osabi 101arm_netbsd_aout_osabi_sniffer (bfd *abfd) 102{ 103 if (strcmp (bfd_get_target (abfd), "a.out-arm-netbsd") == 0) 104 return GDB_OSABI_NETBSD_AOUT; 105 106 return GDB_OSABI_UNKNOWN; 107} 108 109void 110_initialize_arm_netbsd_tdep (void) 111{ 112 gdbarch_register_osabi_sniffer (bfd_arch_arm, bfd_target_aout_flavour, 113 arm_netbsd_aout_osabi_sniffer); 114 115 gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_AOUT, 116 arm_netbsd_aout_init_abi); 117 gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_ELF, 118 arm_netbsd_elf_init_abi); 119} 120