* gdbint.texinfo (Host Definition): Remove description of

[deliverable/binutils-gdb.git] / gdb / m68klinux-nat.c

diff --git a/gdb/m68klinux-nat.c b/gdb/m68klinux-nat.c
index 4eed201fcaf9de7e2632ed6998e8899e659f5667..8ab0aed65ea910cb601701a96cad617c2aeb6a4c 100644 (file)
--- a/gdb/m68klinux-nat.c
+++ b/gdb/m68klinux-nat.c
@@ -1,5 +1,5 @@
 /* Motorola m68k native support for Linux
-   Copyright (C) 1996,1998 Free Software Foundation, Inc.
+   Copyright 1996, 1998, 2000, 2001 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -23,6 +23,7 @@
 #include "inferior.h"
 #include "language.h"
 #include "gdbcore.h"
+#include "regcache.h"
 
 #ifdef USG
 #include <sys/types.h>
@@ -60,16 +61,14 @@ static const int regmap[] =
    is stored.  */
 
 int
-m68k_linux_register_u_addr (blockend, regnum)
-     int blockend;
-     int regnum;
+m68k_linux_register_u_addr (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. */
+/*  Given a pointer to a general register set in /proc format
+   (elf_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
@@ -82,9 +81,11 @@ m68k_linux_register_u_addr (blockend, regnum)
 
 #ifndef USE_PROC_FS
 
+/* Prototypes for supply_gregset etc. */
+#include "gregset.h"
+
 void
-supply_gregset (gregsetp)
-     gregset_t *gregsetp;
+supply_gregset (elf_gregset_t *gregsetp)
 {
   int regi;
 
@@ -99,8 +100,7 @@ supply_gregset (gregsetp)
    idea of the current floating point register values. */
 
 void
-supply_fpregset (fpregsetp)
-     fpregset_t *fpregsetp;
+supply_fpregset (elf_fpregset_t *fpregsetp)
 {
   int regi;
 
@@ -112,10 +112,66 @@ supply_fpregset (fpregsetp)
 }
 
 #endif
+
+\f
+/* Interpreting register set info found in core files.  */
+
+/* Provide registers to GDB from a core file.
+
+   (We can't use the generic version of this function in
+   core-regset.c, because we need to use elf_gregset_t instead of
+   gregset_t.)
+
+   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.
+
+   WHICH says which register set corelow suspects this is:
+     0 --- the general-purpose register set, in elf_gregset_t format
+     2 --- the floating-point register set, in elf_fpregset_t format
+
+   REG_ADDR isn't used on Linux.  */
+
+static void
+fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
+                     int which, CORE_ADDR reg_addr)
+{
+  elf_gregset_t gregset;
+  elf_fpregset_t fpregset;
+
+  switch (which)
+    {
+    case 0:
+      if (core_reg_size != sizeof (gregset))
+       warning ("Wrong size gregset in core file.");
+      else
+       {
+         memcpy (&gregset, core_reg_sect, sizeof (gregset));
+         supply_gregset (&gregset);
+       }
+      break;
+
+    case 2:
+      if (core_reg_size != sizeof (fpregset))
+       warning ("Wrong size fpregset in core file.");
+      else
+       {
+         memcpy (&fpregset, core_reg_sect, sizeof (fpregset));
+         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
 
 int
-kernel_u_size ()
+kernel_u_size (void)
 {
   return (sizeof (struct user));
 }
@@ -123,8 +179,7 @@ kernel_u_size ()
 /* Return non-zero if PC points into the signal trampoline.  */
 
 int
-in_sigtramp (pc)
-     CORE_ADDR pc;
+in_sigtramp (CORE_ADDR pc)
 {
   CORE_ADDR sp;
   char buf[TARGET_SHORT_BIT / TARGET_CHAR_BIT];
@@ -154,3 +209,21 @@ in_sigtramp (pc)
 
   return 0;
 }
+
+\f
+/* Register that we are able to handle Linux ELF core file formats.  */
+
+static struct core_fns linux_elf_core_fns =
+{
+  bfd_target_elf_flavour,              /* core_flavour */
+  default_check_format,                        /* check_format */
+  default_core_sniffer,                        /* core_sniffer */
+  fetch_core_registers,                        /* core_read_registers */
+  NULL                                 /* next */
+};
+
+void
+_initialize_m68k_linux_nat ()
+{
+  add_core_fns (&linux_elf_core_fns);
+}