1 /* Target-dependent code for DJGPP/i386. 2 3 Copyright (C) 1988-2019 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 "i386-tdep.h" 22 #include "common/x86-xstate.h" 23 #include "target-descriptions.h" 24 #include "osabi.h" 25 26 static void 27 i386_go32_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) 28 { 29 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 30 31 /* DJGPP doesn't have any special frames for signal handlers. */ 32 tdep->sigtramp_p = NULL; 33 34 tdep->jb_pc_offset = 36; 35 36 /* DJGPP does not support the SSE registers. */ 37 if (!tdesc_has_registers (info.target_desc)) 38 tdep->tdesc = i386_target_description (X86_XSTATE_X87_MASK); 39 40 /* Native compiler is GCC, which uses the SVR4 register numbering 41 even in COFF and STABS. See the comment in i386_gdbarch_init, 42 before the calls to set_gdbarch_stab_reg_to_regnum and 43 set_gdbarch_sdb_reg_to_regnum. */ 44 set_gdbarch_stab_reg_to_regnum (gdbarch, i386_svr4_reg_to_regnum); 45 set_gdbarch_sdb_reg_to_regnum (gdbarch, i386_svr4_reg_to_regnum); 46 47 set_gdbarch_has_dos_based_file_system (gdbarch, 1); 48 49 set_gdbarch_wchar_bit (gdbarch, 16); 50 set_gdbarch_wchar_signed (gdbarch, 0); 51 } 52 53 54 static enum gdb_osabi 55 i386_coff_osabi_sniffer (bfd *abfd) 56 { 57 if (strcmp (bfd_get_target (abfd), "coff-go32-exe") == 0 58 || strcmp (bfd_get_target (abfd), "coff-go32") == 0) 59 return GDB_OSABI_GO32; 60 61 return GDB_OSABI_UNKNOWN; 62 } 63 64 65 void 66 _initialize_i386_go32_tdep () 67 { 68 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour, 69 i386_coff_osabi_sniffer); 70 71 gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_GO32, 72 i386_go32_init_abi); 73 } 74