1 /* Target-specific functions for ARM running under NetBSD. 2 3 Copyright 2002, 2003, 2004 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 2 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, write to the Free Software 19 Foundation, Inc., 59 Temple Place - Suite 330, 20 Boston, MA 02111-1307, USA. */ 21 22 #include "defs.h" 23 #include "osabi.h" 24 25 #include "gdb_string.h" 26 27 #include "arm-tdep.h" 28 #include "nbsd-tdep.h" 29 #include "solib-svr4.h" 30 31 /* Description of the longjmp buffer. */ 32 #define ARM_NBSD_JB_PC 24 33 #define ARM_NBSD_JB_ELEMENT_SIZE INT_REGISTER_SIZE 34 35 /* For compatibility with previous implemenations of GDB on arm/NetBSD, 36 override the default little-endian breakpoint. */ 37 static const char arm_nbsd_arm_le_breakpoint[] = {0x11, 0x00, 0x00, 0xe6}; 38 static const char arm_nbsd_arm_be_breakpoint[] = {0xe6, 0x00, 0x00, 0x11}; 39 static const char arm_nbsd_thumb_le_breakpoint[] = {0xfe, 0xde}; 40 static const char arm_nbsd_thumb_be_breakpoint[] = {0xde, 0xfe}; 41 42 static int 43 arm_netbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name) 44 { 45 if (strcmp (name, "_PROCEDURE_LINKAGE_TABLE_") == 0) 46 return 1; 47 48 return 0; 49 } 50 51 static void 52 arm_netbsd_init_abi_common (struct gdbarch_info info, 53 struct gdbarch *gdbarch) 54 { 55 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 56 57 tdep->lowest_pc = 0x8000; 58 switch (info.byte_order) 59 { 60 case BFD_ENDIAN_LITTLE: 61 tdep->arm_breakpoint = arm_nbsd_arm_le_breakpoint; 62 tdep->thumb_breakpoint = arm_nbsd_thumb_le_breakpoint; 63 tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_le_breakpoint); 64 tdep->thumb_breakpoint_size = sizeof (arm_nbsd_thumb_le_breakpoint); 65 break; 66 67 case BFD_ENDIAN_BIG: 68 tdep->arm_breakpoint = arm_nbsd_arm_be_breakpoint; 69 tdep->thumb_breakpoint = arm_nbsd_thumb_be_breakpoint; 70 tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_be_breakpoint); 71 tdep->thumb_breakpoint_size = sizeof (arm_nbsd_thumb_be_breakpoint); 72 break; 73 74 default: 75 internal_error (__FILE__, __LINE__, 76 "arm_gdbarch_init: bad byte order for float format"); 77 } 78 79 tdep->jb_pc = ARM_NBSD_JB_PC; 80 tdep->jb_elt_size = ARM_NBSD_JB_ELEMENT_SIZE; 81 } 82 83 static void 84 arm_netbsd_aout_init_abi (struct gdbarch_info info, 85 struct gdbarch *gdbarch) 86 { 87 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 88 89 arm_netbsd_init_abi_common (info, gdbarch); 90 91 set_gdbarch_in_solib_call_trampoline 92 (gdbarch, arm_netbsd_aout_in_solib_call_trampoline); 93 tdep->fp_model = ARM_FLOAT_SOFT_FPA; 94 } 95 96 static void 97 arm_netbsd_elf_init_abi (struct gdbarch_info info, 98 struct gdbarch *gdbarch) 99 { 100 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 101 102 arm_netbsd_init_abi_common (info, gdbarch); 103 104 set_solib_svr4_fetch_link_map_offsets (gdbarch, 105 nbsd_ilp32_solib_svr4_fetch_link_map_offsets); 106 107 tdep->fp_model = ARM_FLOAT_SOFT_VFP; 108 } 109 110 static enum gdb_osabi 111 arm_netbsd_aout_osabi_sniffer (bfd *abfd) 112 { 113 if (strcmp (bfd_get_target (abfd), "a.out-arm-netbsd") == 0) 114 return GDB_OSABI_NETBSD_AOUT; 115 116 return GDB_OSABI_UNKNOWN; 117 } 118 119 void 120 _initialize_arm_netbsd_tdep (void) 121 { 122 gdbarch_register_osabi_sniffer (bfd_arch_arm, bfd_target_aout_flavour, 123 arm_netbsd_aout_osabi_sniffer); 124 125 gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_AOUT, 126 arm_netbsd_aout_init_abi); 127 gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_ELF, 128 arm_netbsd_elf_init_abi); 129 gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_OPENBSD_ELF, 130 arm_netbsd_elf_init_abi); 131 } 132