1 /* Target-dependent code for Newlib ARC. 2 3 Copyright (C) 2016-2017 Free Software Foundation, Inc. 4 Contributed by Synopsys Inc. 5 6 This file is part of GDB. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 20 21 #include "defs.h" 22 23 #include "gdbarch.h" 24 #include "arc-tdep.h" 25 #include "osabi.h" 26 27 /* Implement the 'init_osabi' method of struct gdb_osabi_handler. */ 28 29 static void 30 arc_newlib_init_osabi (struct gdbarch_info info, struct gdbarch *gdbarch) 31 { 32 if (arc_debug) 33 debug_printf ("arc-newlib: Initialization.\n"); 34 35 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 36 37 /* Offset of original PC in longjmp jump buffer (in registers). Value of PC 38 offset can be found in newlib/libc/machine/arc/setjmp.S. */ 39 tdep->jb_pc = 18; 40 } 41 42 /* Recognize ARC Newlib object files. */ 43 44 static enum gdb_osabi 45 arc_newlib_osabi_sniffer (bfd *abfd) 46 { 47 if (arc_debug) 48 debug_printf ("arc-newlib: OS/ABI sniffer.\n"); 49 50 /* crt0.S in libgloss for ARC defines .ivt section for interrupt handlers. 51 If this section is not present then this is likely not a newlib - could be 52 a Linux application or some non-newlib baremetal application. */ 53 if (bfd_get_section_by_name (abfd, ".ivt") != NULL) 54 return GDB_OSABI_NEWLIB; 55 else 56 return GDB_OSABI_UNKNOWN; 57 } 58 59 /* Provide a prototype to silence -Wmissing-prototypes. */ 60 extern initialize_file_ftype _initialize_arc_newlib_tdep; 61 62 void 63 _initialize_arc_newlib_tdep (void) 64 { 65 gdbarch_register_osabi_sniffer (bfd_arch_arc, bfd_target_elf_flavour, 66 arc_newlib_osabi_sniffer); 67 gdbarch_register_osabi (bfd_arch_arc, 0, GDB_OSABI_NEWLIB, 68 arc_newlib_init_osabi); 69 } 70