1 files changed, 123 insertions, 0 deletions
diff --git a/gdb/i386-bsd-tdep.c b/gdb/i386-bsd-tdep.c
new file mode 100644
index 0000000..15809b3
--- /dev/null
+++ b/gdb/i386-bsd-tdep.c
@@ -0,0 +1,123 @@
+/* Target-dependent code for i386 BSD's.
+
+   Copyright (C) 2001-2016 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+#include "arch-utils.h"
+#include "frame.h"
+#include "gdbcore.h"
+#include "regcache.h"
+#include "osabi.h"
+
+#include "i386-tdep.h"
+
+/* Support for signal handlers.  */
+
+/* Assuming THIS_FRAME is for a BSD sigtramp routine, return the
+   address of the associated sigcontext structure.  */
+
+static CORE_ADDR
+i386bsd_sigcontext_addr (struct frame_info *this_frame)
+{
+  struct gdbarch *gdbarch = get_frame_arch (this_frame);
+  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+  gdb_byte buf[4];
+  CORE_ADDR sp;
+
+  get_frame_register (this_frame, I386_ESP_REGNUM, buf);
+  sp = extract_unsigned_integer (buf, 4, byte_order);
+
+  return read_memory_unsigned_integer (sp + 8, 4, byte_order);
+}
+
+
+/* Support for shared libraries.  */
+
+/* Traditional BSD (4.3 BSD, still used for BSDI and 386BSD).  */
+
+/* From <machine/signal.h>.  */
+int i386bsd_sc_reg_offset[] =
+{
+  -1,				/* %eax */
+  -1,				/* %ecx */
+  -1,				/* %edx */
+  -1,				/* %ebx */
+  8 + 0 * 4,			/* %esp */
+  8 + 1 * 4,			/* %ebp */
+  -1,				/* %esi */
+  -1,				/* %edi */
+  8 + 3 * 4,			/* %eip */
+  8 + 4 * 4,			/* %eflags */
+  -1,				/* %cs */
+  -1,				/* %ss */
+  -1,				/* %ds */
+  -1,				/* %es */
+  -1,				/* %fs */
+  -1				/* %gs */
+};
+
+void
+i386bsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+  tdep->jb_pc_offset = 0;
+
+  tdep->sigtramp_start = 0xfdbfdfc0;
+  tdep->sigtramp_end = 0xfdbfe000;
+  tdep->sigcontext_addr = i386bsd_sigcontext_addr;
+  tdep->sc_reg_offset = i386bsd_sc_reg_offset;
+  tdep->sc_num_regs = ARRAY_SIZE (i386bsd_sc_reg_offset);
+}
+
+
+static enum gdb_osabi
+i386bsd_aout_osabi_sniffer (bfd *abfd)
+{
+  if (strcmp (bfd_get_target (abfd), "a.out-i386-netbsd") == 0)
+    return GDB_OSABI_NETBSD_AOUT;
+
+  if (strcmp (bfd_get_target (abfd), "a.out-i386-freebsd") == 0)
+    return GDB_OSABI_FREEBSD_AOUT;
+
+  return GDB_OSABI_UNKNOWN;
+}
+
+static enum gdb_osabi
+i386bsd_core_osabi_sniffer (bfd *abfd)
+{
+  if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
+    return GDB_OSABI_NETBSD_AOUT;
+
+  return GDB_OSABI_UNKNOWN;
+}
+
+
+/* Provide a prototype to silence -Wmissing-prototypes.  */
+void _initialize_i386bsd_tdep (void);
+
+void
+_initialize_i386bsd_tdep (void)
+{
+  gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_aout_flavour,
+				  i386bsd_aout_osabi_sniffer);
+
+  /* BFD doesn't set a flavour for NetBSD style a.out core files.  */
+  gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_unknown_flavour,
+				  i386bsd_core_osabi_sniffer);
+}