/* Machine independent GDB support for core files on systems using "regsets".
- Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000
+
+ Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2003
Free Software Foundation, Inc.
This file is part of GDB.
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.
-
- */
+/* This file is used by most systems that use ELF for their core
+ dumps. This includes most systems that have SVR4-ish variant of
+ /proc. For these systems, the registers are laid out the same way
+ in core files as in the gregset_t and fpregset_t structures that
+ are used in the interaction with /proc (Irix 4 is an exception and
+ therefore doesn't use this file). Quite a few systems without a
+ SVR4-ish /proc define these structures too, and can make use of
+ this code too. */
#include "defs.h"
+#include "command.h"
+#include "gdbcore.h"
+#include "inferior.h"
+#include "target.h"
+#include <fcntl.h>
+#include <errno.h>
+#include "gdb_string.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"
-
-/* Prototypes for supply_gregset etc. */
+/* Prototypes for supply_gregset etc. */
#include "gregset.h"
-static void fetch_core_registers (char *, unsigned, int, CORE_ADDR);
-
-void _initialize_core_regset (void);
-
-/*
-
- GLOBAL FUNCTION
+/* Provide registers to GDB from a core file.
- fetch_core_registers -- fetch current registers from core file
+ CORE_REG_SECT points to an array of bytes, which are the contents
+ of a `note' from a core file which BFD thinks might contain
+ register contents. CORE_REG_SIZE is its size.
- SYNOPSIS
+ WHICH says which register set corelow suspects this is:
+ 0 --- the general-purpose register set, in gregset_t format
+ 2 --- the floating-point register set, in fpregset_t format
- 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 compared to
- the size of the gregset or fpgregset structures (as appropriate) to
- validate the size of the structure from the core file. The
- REG_ADDR parameter is ignored.
-
- */
+ REG_ADDR is ignored. */
static void
fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
gdb_gregset_t gregset;
gdb_fpregset_t fpregset;
- if (which == 0)
+ switch (which)
{
+ case 0:
if (core_reg_size != sizeof (gregset))
- {
- warning ("wrong size gregset struct in core file");
- }
+ warning ("Wrong size gregset in core file.");
else
{
- memcpy ((char *) &gregset, core_reg_sect, sizeof (gregset));
+ memcpy (&gregset, core_reg_sect, sizeof (gregset));
supply_gregset (&gregset);
}
- }
- else if (which == 2)
- {
+ break;
+
+ case 2:
if (core_reg_size != sizeof (fpregset))
- {
- warning ("wrong size fpregset struct in core file");
- }
+ warning ("Wrong size fpregset in core file.");
else
{
- memcpy ((char *) &fpregset, core_reg_sect, sizeof (fpregset));
+ memcpy (&fpregset, core_reg_sect, sizeof (fpregset));
if (FP0_REGNUM >= 0)
supply_fpregset (&fpregset);
}
+ break;
+
+ default:
+ /* We've covered all the kinds of registers we know about here,
+ so this must be something we wouldn't know what to do with
+ anyway. Just ignore it. */
+ break;
}
}
\f
-/* Register that we are able to handle ELF file formats using standard
- procfs "regset" structures. */
+/* Register that we are able to handle ELF core file formats using
+ standard procfs "regset" structures. */
static struct core_fns regset_core_fns =
{
NULL /* next */
};
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern void _initialize_core_regset (void);
+
void
_initialize_core_regset (void)
{
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