1/* Target-dependent code for DJGPP/i386.
2
3   Copyright (C) 1988-2023 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 "gdbsupport/x86-xstate.h"
23#include "target-descriptions.h"
24#include "osabi.h"
25
26static void
27i386_go32_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
28{
29  i386_gdbarch_tdep *tdep = gdbarch_tdep<i386_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, false);
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
54static enum gdb_osabi
55i386_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
65void _initialize_i386_go32_tdep ();
66void
67_initialize_i386_go32_tdep ()
68{
69  gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour,
70				  i386_coff_osabi_sniffer);
71
72  gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_GO32,
73			  i386_go32_init_abi);
74}
75