Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 155 insertions, 0 deletions

diff --git a/gdb/m68klinux-nat.c b/gdb/m68klinux-nat.c
new file mode 100644
index 0000000..8367b24
--- /dev/null
+++ b/gdb/m68klinux-nat.c
@@ -0,0 +1,155 @@
+/* Motorola m68k native support for Linux
+   Copyright (C) 1996,1998 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 2 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, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include "defs.h"
+#include "frame.h"
+#include "inferior.h"
+#include "language.h"
+#include "gdbcore.h"
+
+#ifdef USG
+#include <sys/types.h>
+#endif
+
+#include <sys/param.h>
+#include <sys/dir.h>
+#include <signal.h>
+#include <sys/user.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <sys/procfs.h>
+
+#include <sys/file.h>
+#include "gdb_stat.h"
+
+#include "floatformat.h"
+
+#include "target.h"
+
+
+/* This table must line up with REGISTER_NAMES in tm-m68k.h */
+static const int regmap[] = 
+{
+  PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7,
+  PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP,
+  PT_SR, PT_PC,
+  /* PT_FP0, ..., PT_FP7 */
+  21, 24, 27, 30, 33, 36, 39, 42,
+  /* PT_FPCR, PT_FPSR, PT_FPIAR */
+  45, 46, 47
+};
+
+/* BLOCKEND is the value of u.u_ar0, and points to the place where GS
+   is stored.  */
+
+int
+m68k_linux_register_u_addr (blockend, regnum)
+     int blockend;
+     int regnum;
+{
+    return (blockend + 4 * regmap[regnum]);
+}
+
+/*  Given a pointer to a general register set in /proc format (gregset_t *),
+    unpack the register contents and supply them as gdb's idea of the current
+    register values. */
+
+
+/* Note both m68k-tdep.c and m68klinux-nat.c contain definitions
+   for supply_gregset and supply_fpregset. The definitions
+   in m68k-tdep.c are valid if USE_PROC_FS is defined. Otherwise,
+   the definitions in m68klinux-nat.c will be used. This is a 
+   bit of a hack. The supply_* routines do not belong in 
+   *_tdep.c files. But, there are several lynx ports that currently 
+   depend on these definitions. */ 
+
+#ifndef USE_PROC_FS
+
+void
+supply_gregset (gregsetp)
+     gregset_t *gregsetp;
+{
+  int regi;
+
+  for (regi = D0_REGNUM ; regi <= SP_REGNUM ; regi++)
+    supply_register (regi, (char *) (*gregsetp + regmap[regi]));
+  supply_register (PS_REGNUM, (char *) (*gregsetp + PT_SR));
+  supply_register (PC_REGNUM, (char *) (*gregsetp + PT_PC));
+}
+
+/*  Given a pointer to a floating point register set in /proc format
+    (fpregset_t *), unpack the register contents and supply them as gdb's
+    idea of the current floating point register values. */
+
+void 
+supply_fpregset (fpregsetp)
+     fpregset_t *fpregsetp;
+{
+  int regi;
+
+  for (regi = FP0_REGNUM ; regi < FPC_REGNUM ; regi++)
+    supply_register (regi, (char *) &fpregsetp->fpregs[(regi - FP0_REGNUM) * 3]);
+  supply_register (FPC_REGNUM, (char *) &fpregsetp->fpcntl[0]);
+  supply_register (FPS_REGNUM, (char *) &fpregsetp->fpcntl[1]);
+  supply_register (FPI_REGNUM, (char *) &fpregsetp->fpcntl[2]);
+}
+
+#endif
+
+
+int
+kernel_u_size ()
+{
+  return (sizeof (struct user));
+}
+
+/* Return non-zero if PC points into the signal trampoline.  */
+
+int
+in_sigtramp (pc)
+     CORE_ADDR pc;
+{
+  CORE_ADDR sp;
+  char buf[TARGET_SHORT_BIT / TARGET_CHAR_BIT];
+  int insn;
+
+  sp = read_register (SP_REGNUM);
+  if (pc - 2 < sp)
+    return 0;
+
+  if (read_memory_nobpt (pc, buf, sizeof (buf)))
+    return 0;
+  insn = extract_unsigned_integer (buf, sizeof (buf));
+  if (insn == 0xdefc /* addaw #,sp */
+      || insn == 0x7077 /* moveq #119,d0 */
+      || insn == 0x4e40 /* trap #0 */
+      || insn == 0x203c /* movel #,d0 */)
+    return 1;
+
+  if (read_memory_nobpt (pc - 2, buf, sizeof (buf)))
+    return 0;
+  insn = extract_unsigned_integer (buf, sizeof (buf));
+  if (insn == 0xdefc /* addaw #,sp */
+      || insn == 0x7077 /* moveq #119,d0 */
+      || insn == 0x4e40 /* trap #0 */
+      || insn == 0x203c /* movel #,d0 */)
+    return 1;
+
+  return 0;
+}