Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 134 insertions, 0 deletions

diff --git a/gdb/core-regset.c b/gdb/core-regset.c
new file mode 100644
index 00000000000..d925abea746
--- /dev/null
+++ b/gdb/core-regset.c
@@ -0,0 +1,134 @@
+/* Machine independent GDB support for core files on systems using "regsets".
+   Copyright 1993-1998 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.  */
+
+
+/*			N  O  T  E  S
+
+This file is used by most systems that implement /proc.  For these systems,
+the general registers are laid out the same way in both the core file and
+the gregset_p structure.  The current exception to this is Irix-4.*, where
+the gregset_p structure is split up into two pieces in the core file.
+
+The general register and floating point register sets are manipulated by
+separate ioctl's.  This file makes the assumption that if FP0_REGNUM is
+defined, then support for the floating point register set is desired,
+regardless of whether or not the actual target has floating point hardware.
+
+ */
+
+#include "defs.h"
+
+#include <time.h>
+#ifdef HAVE_SYS_PROCFS_H
+#include <sys/procfs.h>
+#endif
+#include <fcntl.h>
+#include <errno.h>
+#include "gdb_string.h"
+
+#include "inferior.h"
+#include "target.h"
+#include "command.h"
+#include "gdbcore.h"
+
+static void fetch_core_registers PARAMS ((char *, unsigned, int, CORE_ADDR));
+
+void _initialize_core_regset PARAMS ((void));
+
+/*
+
+GLOBAL FUNCTION
+
+	fetch_core_registers -- fetch current registers from core file
+
+SYNOPSIS
+
+	void fetch_core_registers (char *core_reg_sect,
+					  unsigned core_reg_size,
+					  int which, CORE_ADDR reg_addr)
+
+DESCRIPTION
+
+	Read the values of either the general register set (WHICH equals 0)
+	or the floating point register set (WHICH equals 2) from the core
+	file data (pointed to by CORE_REG_SECT), and update gdb's idea of
+	their current values.  The CORE_REG_SIZE parameter is ignored.
+
+NOTES
+
+	Use the indicated sizes to validate the gregset and fpregset
+	structures.
+*/
+
+static void
+fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
+     char *core_reg_sect;
+     unsigned core_reg_size;
+     int which;
+     CORE_ADDR reg_addr;	/* Unused in this version */
+{
+#if defined (HAVE_GREGSET_T) && defined (HAVE_FPREGSET_T)
+  gregset_t gregset;
+  fpregset_t fpregset;
+
+  if (which == 0)
+    {
+      if (core_reg_size != sizeof (gregset))
+	{
+	  warning ("wrong size gregset struct in core file");
+	}
+      else
+	{
+	  memcpy ((char *) &gregset, core_reg_sect, sizeof (gregset));
+	  supply_gregset (&gregset);
+	}
+    }
+  else if (which == 2)
+    {
+      if (core_reg_size != sizeof (fpregset))
+	{
+	  warning ("wrong size fpregset struct in core file");
+	}
+      else
+	{
+	  memcpy ((char *) &fpregset, core_reg_sect, sizeof (fpregset));
+#if defined (FP0_REGNUM)
+	  supply_fpregset (&fpregset);
+#endif
+	}
+    }
+#endif	/* defined(HAVE_GREGSET_T) && defined (HAVE_FPREGSET_T) */
+}
+
+
+/* Register that we are able to handle ELF file formats using standard
+   procfs "regset" structures.  */
+
+static struct core_fns regset_core_fns =
+{
+  bfd_target_elf_flavour,
+  fetch_core_registers,
+  NULL
+};
+
+void
+_initialize_core_regset ()
+{
+  add_core_fns (&regset_core_fns);
+}