gdb/gdb-6.5-gcore-i386-on-amd64.patch

2006-10-01  Jan Kratochvil  <jan.kratochvil@redhat.com>
	    Fujitsu

	* amd64-linux-nat.c: Support new linux_elfcore_write_prpsinfo,
	linux_elfcore_write_prstatus, linux_elfcore_write_prfpreg.
	(i386_linux_gregset32_reg_offset): New mapping for i386 on amd64.
	* gcore.c (gcore_create_callback): Comment vdso Linux kernel bug.
	* configure.ac: Check for <sys/user32.h>, <sys/procfs32.h>.
	* configure, config.in: Regenerated.
	* gdb_user32.h, gdb_procfs32.h: Define 32-bit core files even for
	64-bit gdb, provide fallbacks for <sys/user32.h> and <sys/procfs32.h>.
	* linux-nat.c: Virtualize `elfcore_*' by (*`linux_elfcore_*').
	(linux_nat_do_thread_registers): Likewise.
	(linux_nat_make_corefile_notes): Likewise.
	* linux-nat.h: Likewise.
	* Makefile.in: Dependencies updated.

2007-10-16  Jan Kratochvil  <jan.kratochvil@redhat.com>

	Port to GDB-6.7.

2008-02-24  Jan Kratochvil  <jan.kratochvil@redhat.com>

	Port to GDB-6.8pre.

Index: gdb-7.0.50.20100115/gdb/amd64-linux-nat.c
===================================================================
--- gdb-7.0.50.20100115.orig/gdb/amd64-linux-nat.c	2010-01-15 03:16:43.000000000 +0100
+++ gdb-7.0.50.20100115/gdb/amd64-linux-nat.c	2010-01-15 03:20:58.000000000 +0100
@@ -51,6 +51,9 @@
 #include "i386-linux-tdep.h"
 #include "amd64-nat.h"
 #include "i386-nat.h"
+#include "i387-tdep.h"
+#include "elf-bfd.h"
+#include "gdb_procfs32.h"
 
 /* Mapping between the general-purpose registers in GNU/Linux x86-64
    `struct user' format and GDB's register cache layout.  */
@@ -85,6 +88,35 @@ static int amd64_linux_gregset64_reg_off
    GNU/Linux i386 registers are all 32-bit, but since we're
    little-endian we get away with that.  */
 
+/* This info is not reusable from "i386-linux-nat.c" as gdb itself runs in
+   64-bit mode and so ptrace(2) has 64-bit structure layout.
+   Just the corefile being generated has 32-bit layout so we need to do
+   a conversion specific to the i386-on-amd64 compatibility mode.  */
+static int i386_linux_gregset32_reg_offset[] =
+{
+  6 * 4,			/* %eax */
+  1 * 4,			/* %ecx */
+  2 * 4,			/* %edx */
+  0 * 4,			/* %ebx */
+  15 * 4,			/* %esp */
+  5 * 4,			/* %ebp */
+  3 * 4,			/* %esi */
+  4 * 4,			/* %edi */
+  12 * 4,			/* %eip */
+  14 * 4,			/* %eflags */
+  13 * 4,			/* %cs */
+  16 * 4,			/* %ss */
+  7 * 4,			/* %ds */
+  8 * 4,			/* %es */
+  9 * 4,			/* %fs */
+  10 * 4,			/* %gs */
+  -1, -1, -1, -1, -1, -1, -1, -1,
+  -1, -1, -1, -1, -1, -1, -1, -1,
+  -1, -1, -1, -1, -1, -1, -1, -1,
+  -1,
+  11 * 4			/* "orig_eax" */
+};
+
 /* From <sys/reg.h> on GNU/Linux i386.  */
 static int amd64_linux_gregset32_reg_offset[] =
 {
@@ -103,6 +135,96 @@ static int amd64_linux_gregset32_reg_off
 };
 
 
+/* This functions make ELF32 32-bit elfcore note sections
+   on amd64 environment. */
+
+static char *
+amd64_linux_elfcore_write_prpsinfo (bfd *abfd, char *buf, int *bufsiz,
+				    const char *fname, const char *psargs)
+{
+  if (gdbarch_ptr_bit (target_gdbarch) == 32)
+    {
+      int note_type;
+      char *note_name = "CORE";
+      struct elf_prpsinfo32 data;
+      note_type = NT_PRPSINFO;
+
+      memset (&data, 0, sizeof (data));
+      strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
+      strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
+      return elfcore_write_note (abfd, buf, bufsiz,
+				 note_name, note_type, &data, sizeof (data));
+    }
+  else
+    return elfcore_write_prpsinfo (abfd, buf, bufsiz, fname, psargs);
+}
+
+static void
+amd64_linux_set_registers (const gdb_byte *gregs, gdb_byte *buf)
+{
+  int i;
+  /* Copy the i386 registers in the amd64 layout into i386 layout.  */
+  for (i = 0; i < I386_NUM_GREGS; i++)
+    memcpy(buf + i386_linux_gregset32_reg_offset[i],
+	   gregs + amd64_linux_gregset32_reg_offset[i], 4);
+  for (i = I386_CS_REGNUM; i <= I386_GS_REGNUM; i++)
+    memcpy(buf + i386_linux_gregset32_reg_offset[i],
+	   gregs + amd64_linux_gregset32_reg_offset[i], 4);
+}
+
+static char *
+amd64_linux_elfcore_write_prstatus (bfd *abfd, char *buf, int *bufsiz,
+			      long pid, int cursig, const void *gregs)
+{
+  if (gdbarch_ptr_bit (target_gdbarch) == 32)
+    {
+      char *note_name = "CORE";
+      struct elf_prstatus32 prstat;
+      memset (&prstat, 0, sizeof (prstat));
+      prstat.pr_pid = pid;
+      prstat.pr_cursig = cursig;
+      amd64_linux_set_registers (gregs, (gdb_byte *) &prstat.pr_reg);
+      return elfcore_write_note (abfd, buf, bufsiz, note_name,
+				 NT_PRSTATUS, &prstat, sizeof (prstat));
+    }
+  else
+    return elfcore_write_prstatus (abfd, buf, bufsiz, pid, cursig, gregs);
+}
+
+static char *
+amd64_elfcore_write_prxfpreg32 (bfd *abfd, char *buf, int *bufsiz,
+				struct regcache *regcache)
+{
+  char *note_name = "LINUX";
+  elf_fpxregset32_t fpxregs32;
+
+  i387_collect_fxsave (regcache, -1, &fpxregs32);
+  return elfcore_write_note(abfd, buf, bufsiz,
+				     note_name, NT_PRXFPREG, &fpxregs32,
+				     sizeof(fpxregs32));
+}
+
+static char *
+amd64_linux_elfcore_write_prfpreg (bfd *abfd, char *buf,
+				   int *bufsiz, const void *fpregs, int size,
+				   struct regcache *regcache)
+{
+  if (gdbarch_ptr_bit (target_gdbarch) == 32)
+    {
+      char *note_name = "CORE";
+      elf_fpregset32_t fpregs32;
+  
+      i387_collect_fsave (regcache, -1, &fpregs32);
+      buf = elfcore_write_note(abfd, buf, bufsiz, note_name,
+			       NT_FPREGSET, &fpregs32, sizeof(fpregs32));
+
+      return amd64_elfcore_write_prxfpreg32 (abfd, buf, bufsiz, regcache);
+    }
+  else
+    return elfcore_write_prfpreg (abfd, buf, bufsiz, fpregs, size);
+}
+
+
 /* Transfering the general-purpose registers between GDB, inferiors
    and core files.  */
 
@@ -727,6 +849,11 @@ _initialize_amd64_linux_nat (void)
   t->to_fetch_registers = amd64_linux_fetch_inferior_registers;
   t->to_store_registers = amd64_linux_store_inferior_registers;
 
+  /* This functions make elfcore note sections. */
+  linux_elfcore_write_prpsinfo = amd64_linux_elfcore_write_prpsinfo;
+  linux_elfcore_write_prstatus = amd64_linux_elfcore_write_prstatus;
+  linux_elfcore_write_prfpreg = amd64_linux_elfcore_write_prfpreg;
+
   /* Register the target.  */
   linux_nat_add_target (t);
   linux_nat_set_new_thread (t, amd64_linux_new_thread);
Index: gdb-7.0.50.20100115/gdb/config.in
===================================================================
--- gdb-7.0.50.20100115.orig/gdb/config.in	2010-01-15 03:16:43.000000000 +0100
+++ gdb-7.0.50.20100115/gdb/config.in	2010-01-15 03:20:58.000000000 +0100
@@ -149,6 +149,9 @@
 /* Define to 1 if you have the <elf_hp.h> header file. */
 #undef HAVE_ELF_HP_H
 
+/* Define if struct elf_prstatus32 is available. */
+#undef HAVE_ELF_PRSTATUS32
+
 /* Define to 1 if your system has the etext variable. */
 #undef HAVE_ETEXT
 
@@ -490,6 +493,9 @@
 /* Define to 1 if you have the <sys/poll.h> header file. */
 #undef HAVE_SYS_POLL_H
 
+/* Define to 1 if you have the <sys/procfs32.h> header file. */
+#undef HAVE_SYS_PROCFS32_H
+
 /* Define to 1 if you have the <sys/procfs.h> header file. */
 #undef HAVE_SYS_PROCFS_H
 
@@ -517,6 +523,9 @@
 /* Define to 1 if you have the <sys/types.h> header file. */
 #undef HAVE_SYS_TYPES_H
 
+/* Define to 1 if you have the <sys/user32.h> header file. */
+#undef HAVE_SYS_USER32_H
+
 /* Define to 1 if you have the <sys/user.h> header file. */
 #undef HAVE_SYS_USER_H
 
Index: gdb-7.0.50.20100115/gdb/configure
===================================================================
--- gdb-7.0.50.20100115.orig/gdb/configure	2010-01-15 03:16:43.000000000 +0100
+++ gdb-7.0.50.20100115/gdb/configure	2010-01-15 03:20:58.000000000 +0100
@@ -10043,6 +10043,268 @@ $as_echo "#define STDC_HEADERS 1" >>conf
 
 fi
 
+
+
+for ac_header in sys/user32.h sys/procfs32.h
+do
+as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+else
+  # Is the header compilable?
+echo "$as_me:$LINENO: checking $ac_header usability" >&5
+echo $ECHO_N "checking $ac_header usability... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_includes_default
+#include <$ac_header>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_header_compiler=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_header_compiler=no
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
+echo "${ECHO_T}$ac_header_compiler" >&6
+
+# Is the header present?
+echo "$as_me:$LINENO: checking $ac_header presence" >&5
+echo $ECHO_N "checking $ac_header presence... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <$ac_header>
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_c_preproc_warn_flag
+    ac_cpp_err=$ac_cpp_err$ac_c_werror_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  ac_header_preproc=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  ac_header_preproc=no
+fi
+rm -f conftest.err conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
+echo "${ECHO_T}$ac_header_preproc" >&6
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in
+  yes:no: )
+    { echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&5
+echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the compiler's result" >&5
+echo "$as_me: WARNING: $ac_header: proceeding with the compiler's result" >&2;}
+    ac_header_preproc=yes
+    ;;
+  no:yes:* )
+    { echo "$as_me:$LINENO: WARNING: $ac_header: present but cannot be compiled" >&5
+echo "$as_me: WARNING: $ac_header: present but cannot be compiled" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header:     check for missing prerequisite headers?" >&5
+echo "$as_me: WARNING: $ac_header:     check for missing prerequisite headers?" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: see the Autoconf documentation" >&5
+echo "$as_me: WARNING: $ac_header: see the Autoconf documentation" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header:     section \"Present But Cannot Be Compiled\"" >&5
+echo "$as_me: WARNING: $ac_header:     section \"Present But Cannot Be Compiled\"" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: in the future, the compiler will take precedence" >&5
+echo "$as_me: WARNING: $ac_header: in the future, the compiler will take precedence" >&2;}
+    (
+      cat <<\_ASBOX
+## ------------------------------------------ ##
+## Report this to the AC_PACKAGE_NAME lists.  ##
+## ------------------------------------------ ##
+_ASBOX
+    ) |
+      sed "s/^/$as_me: WARNING:     /" >&2
+    ;;
+esac
+echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  eval "$as_ac_Header=\$ac_header_preproc"
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+
+fi
+if test `eval echo '${'$as_ac_Header'}'` = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+echo "$as_me:$LINENO: checking for struct elf_prstatus32.pr_reg" >&5
+echo $ECHO_N "checking for struct elf_prstatus32.pr_reg... $ECHO_C" >&6
+if test "${ac_cv_member_struct_elf_prstatus32_pr_reg+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <sys/procfs.h>
+
+int
+main ()
+{
+static struct elf_prstatus32 ac_aggr;
+if (ac_aggr.pr_reg)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_member_struct_elf_prstatus32_pr_reg=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <sys/procfs.h>
+
+int
+main ()
+{
+static struct elf_prstatus32 ac_aggr;
+if (sizeof ac_aggr.pr_reg)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_member_struct_elf_prstatus32_pr_reg=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_member_struct_elf_prstatus32_pr_reg=no
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_member_struct_elf_prstatus32_pr_reg" >&5
+echo "${ECHO_T}$ac_cv_member_struct_elf_prstatus32_pr_reg" >&6
+if test $ac_cv_member_struct_elf_prstatus32_pr_reg = yes; then
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_ELF_PRSTATUS32 1
+_ACEOF
+
+fi
+
 # elf_hp.h is for HP/UX 64-bit shared library support.
 # FIXME: kettenis/20030102: In most cases we include these (ctype.h, time.h)
 # unconditionally, so what's the point in checking these?
Index: gdb-7.0.50.20100115/gdb/configure.ac
===================================================================
--- gdb-7.0.50.20100115.orig/gdb/configure.ac	2010-01-15 03:16:43.000000000 +0100
+++ gdb-7.0.50.20100115/gdb/configure.ac	2010-01-15 03:20:58.000000000 +0100
@@ -758,6 +758,11 @@ AC_SUBST(PYTHON_CFLAGS)
 AC_HEADER_DIRENT
 AC_HEADER_STAT
 AC_HEADER_STDC
+AC_CHECK_HEADERS([sys/user32.h sys/procfs32.h])
+AC_CHECK_MEMBER([struct elf_prstatus32.pr_reg],
+		[AC_DEFINE(HAVE_ELF_PRSTATUS32, 1,
+			   [Define if struct elf_prstatus32 is available. ])],
+		[], [#include <sys/procfs.h>])
 # elf_hp.h is for HP/UX 64-bit shared library support.
 # FIXME: kettenis/20030102: In most cases we include these (ctype.h, time.h)
 # unconditionally, so what's the point in checking these?
Index: gdb-7.0.50.20100115/gdb/gcore.c
===================================================================
--- gdb-7.0.50.20100115.orig/gdb/gcore.c	2010-01-15 03:17:59.000000000 +0100
+++ gdb-7.0.50.20100115/gdb/gcore.c	2010-01-15 03:20:58.000000000 +0100
@@ -376,6 +376,11 @@ gcore_create_callback (CORE_ADDR vaddr, 
   asection *osec;
   flagword flags = SEC_ALLOC | SEC_HAS_CONTENTS | SEC_LOAD;
 
+  /* Some Linux kernel versions around 2.6.17 have for i386 inferiors running
+     in compatibility mode on amd64 kernel their VSYSCALL page (at 0xffffe000)
+     protected as RWX==000 by default and gdb fails to read the library header
+     upon loading the core.  This is a Linux kernel bug being fixed.  */
+
   /* If the memory segment has no permissions set, ignore it, otherwise
      when we later try to access it for read/write, we'll get an error
      or jam the kernel.  */
Index: gdb-7.0.50.20100115/gdb/gdb_procfs32.h
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ gdb-7.0.50.20100115/gdb/gdb_procfs32.h	2010-01-15 03:20:58.000000000 +0100
@@ -0,0 +1,128 @@
+#ifdef HAVE_SYS_PROCFS32_H
+#include <sys/procfs32.h>
+#elif !defined HAVE_ELF_PRSTATUS32
+
+/* Copyright (C) 2006 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _SYS_PROCFS32_H
+#define _SYS_PROCFS32_H	1
+
+/* This is somewhat modelled after the file of the same name on SVR4
+   systems.  It provides a definition of the core file format for ELF
+   used on Linux.  It doesn't have anything to do with the /proc file
+   system, even though Linux has one.
+
+   Anyway, the whole purpose of this file is for GDB and GDB only.
+   Don't read too much into it.  Don't use it for anything other than
+   GDB unless you know what you are doing.  */
+
+#include <features.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include "gdb_user32.h"
+
+/* We define here only the symbols differing from their 64-bit variant.  */
+#include <sys/procfs.h>
+
+__BEGIN_DECLS
+
+/* Type for a general-purpose register.  */
+typedef unsigned int elf_greg32_t;
+
+/* And the whole bunch of them.  We could have used `struct
+   user_regs_struct' directly in the typedef, but tradition says that
+   the register set is an array, which does have some peculiar
+   semantics, so leave it that way.  */
+#define ELF_NGREG32 (sizeof (struct user_regs32_struct) / sizeof(elf_greg32_t))
+typedef elf_greg32_t elf_gregset32_t[ELF_NGREG32];
+
+/* Register set for the floating-point registers.  */
+typedef struct user_fpregs32_struct elf_fpregset32_t;
+
+/* Register set for the extended floating-point registers.  Includes
+   the Pentium III SSE registers in addition to the classic
+   floating-point stuff.  */
+typedef struct user_fpxregs32_struct elf_fpxregset32_t;
+
+
+/* Definitions to generate Intel SVR4-like core files.  These mostly
+   have the same names as the SVR4 types with "elf_" tacked on the
+   front to prevent clashes with Linux definitions, and the typedef
+   forms have been avoided.  This is mostly like the SVR4 structure,
+   but more Linuxy, with things that Linux does not support and which
+   GDB doesn't really use excluded.  */
+
+struct prstatus32_timeval
+  {
+    int tv_sec;
+    int tv_usec;
+  };
+
+struct elf_prstatus32
+  {
+    struct elf_siginfo pr_info;		/* Info associated with signal.  */
+    short int pr_cursig;		/* Current signal.  */
+    unsigned int pr_sigpend;		/* Set of pending signals.  */
+    unsigned int pr_sighold;		/* Set of held signals.  */
+    __pid_t pr_pid;
+    __pid_t pr_ppid;
+    __pid_t pr_pgrp;
+    __pid_t pr_sid;
+    struct prstatus32_timeval pr_utime;		/* User time.  */
+    struct prstatus32_timeval pr_stime;		/* System time.  */
+    struct prstatus32_timeval pr_cutime;	/* Cumulative user time.  */
+    struct prstatus32_timeval pr_cstime;	/* Cumulative system time.  */
+    elf_gregset32_t pr_reg;		/* GP registers.  */
+    int pr_fpvalid;			/* True if math copro being used.  */
+  };
+
+
+struct elf_prpsinfo32
+  {
+    char pr_state;			/* Numeric process state.  */
+    char pr_sname;			/* Char for pr_state.  */
+    char pr_zomb;			/* Zombie.  */
+    char pr_nice;			/* Nice val.  */
+    unsigned int pr_flag;		/* Flags.  */
+    unsigned short int pr_uid;
+    unsigned short int pr_gid;
+    int pr_pid, pr_ppid, pr_pgrp, pr_sid;
+    /* Lots missing */
+    char pr_fname[16];			/* Filename of executable.  */
+    char pr_psargs[ELF_PRARGSZ];	/* Initial part of arg list.  */
+  };
+
+
+/* The rest of this file provides the types for emulation of the
+   Solaris <proc_service.h> interfaces that should be implemented by
+   users of libthread_db.  */
+
+/* Register sets.  Linux has different names.  */
+typedef elf_gregset_t prgregset32_t;
+typedef elf_fpregset_t prfpregset32_t;
+
+/* Process status and info.  In the end we do provide typedefs for them.  */
+typedef struct elf_prstatus32 prstatus32_t;
+typedef struct elf_prpsinfo32 prpsinfo32_t;
+
+__END_DECLS
+
+#endif	/* _SYS_PROCFS32_H */
+
+#endif /* HAVE_SYS_PROCFS32_H */
Index: gdb-7.0.50.20100115/gdb/gdb_user32.h
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ gdb-7.0.50.20100115/gdb/gdb_user32.h	2010-01-15 03:20:58.000000000 +0100
@@ -0,0 +1,108 @@
+#ifdef HAVE_SYS_USER32_H
+#include <sys/user32.h>
+#else
+
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+typedef  int32_t  gdb_int32_t;
+typedef uint32_t gdb_uint32_t;
+#else
+typedef   signed int gdb_uint32_t;
+typedef unsigned int gdb_uint32_t;
+#endif
+
+/* Copyright (C) 2006 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _SYS_USER32_H
+#define _SYS_USER32_H	1
+
+/* These are the 32-bit x86 structures.  */
+
+struct user_fpregs32_struct
+{
+  int32_t cwd;
+  int32_t swd;
+  int32_t twd;
+  int32_t fip;
+  int32_t fcs;
+  int32_t foo;
+  int32_t fos;
+  int32_t st_space [20];
+};
+
+struct user_fpxregs32_struct
+{
+  unsigned short int cwd;
+  unsigned short int swd;
+  unsigned short int twd;
+  unsigned short int fop;
+  int32_t fip;
+  int32_t fcs;
+  int32_t foo;
+  int32_t fos;
+  int32_t mxcsr;
+  int32_t reserved;
+  int32_t st_space[32];   /* 8*16 bytes for each FP-reg = 128 bytes */
+  int32_t xmm_space[32];  /* 8*16 bytes for each XMM-reg = 128 bytes */
+  int32_t padding[56];
+};
+
+struct user_regs32_struct
+{
+  int32_t ebx;
+  int32_t ecx;
+  int32_t edx;
+  int32_t esi;
+  int32_t edi;
+  int32_t ebp;
+  int32_t eax;
+  int32_t xds;
+  int32_t xes;
+  int32_t xfs;
+  int32_t xgs;
+  int32_t orig_eax;
+  int32_t eip;
+  int32_t xcs;
+  int32_t eflags;
+  int32_t esp;
+  int32_t xss;
+};
+
+struct user32
+{
+  struct user_regs32_struct	regs;
+  int				u_fpvalid;
+  struct user_fpregs32_struct	i387;
+  uint32_t			u_tsize;
+  uint32_t			u_dsize;
+  uint32_t			u_ssize;
+  uint32_t			start_code;
+  uint32_t			start_stack;
+  int32_t			signal;
+  int				reserved;
+  struct user_regs32_struct*	u_ar0;
+  struct user_fpregs32_struct*	u_fpstate;
+  uint32_t			magic;
+  char				u_comm [32];
+  int				u_debugreg [8];
+};
+
+#endif	/* _SYS_USER32_H */
+
+#endif /* HAVE_SYS_USER32_H */
Index: gdb-7.0.50.20100115/gdb/linux-nat.c
===================================================================
--- gdb-7.0.50.20100115.orig/gdb/linux-nat.c	2010-01-15 03:20:45.000000000 +0100
+++ gdb-7.0.50.20100115/gdb/linux-nat.c	2010-01-15 03:20:58.000000000 +0100
@@ -225,6 +225,21 @@ static LONGEST (*super_xfer_partial) (st
 				      const gdb_byte *,
 				      ULONGEST, LONGEST);
 
+/* This functions make elfcore note sections.
+   They may get overriden by code adjusting data for multi-target builds.  */
+char *(*linux_elfcore_write_prpsinfo)
+  (bfd *, char *, int *, const char *, const char *) = elfcore_write_prpsinfo;
+char *(*linux_elfcore_write_prstatus)
+  (bfd *, char *, int *, long, int, const void *) = elfcore_write_prstatus;
+static char *
+linux_elfcore_write_prfpreg_bfd (bfd *abfd, char *buf, int *bufsiz,
+				 const void *fpregs, int size, struct regcache *regcache)
+{
+  return elfcore_write_prfpreg (abfd, buf, bufsiz, fpregs, size);
+}
+char *(*linux_elfcore_write_prfpreg) (bfd *, char *, int *, const void *, int,
+			   struct regcache *) = linux_elfcore_write_prfpreg_bfd;
+
 static int debug_linux_nat;
 static void
 show_debug_linux_nat (struct ui_file *file, int from_tty,
@@ -4187,7 +4202,7 @@ linux_nat_do_thread_registers (bfd *obfd
   else
     fill_gregset (regcache, &gregs, -1);
 
-  note_data = (char *) elfcore_write_prstatus (obfd,
+  note_data = (char *) linux_elfcore_write_prstatus (obfd,
 					       note_data,
 					       note_size,
 					       lwp,
@@ -4237,10 +4252,10 @@ linux_nat_do_thread_registers (bfd *obfd
       else
 	fill_fpregset (regcache, &fpregs, -1);
 
-      note_data = (char *) elfcore_write_prfpreg (obfd,
+      note_data = (char *) linux_elfcore_write_prfpreg (obfd,
 						  note_data,
 						  note_size,
-						  &fpregs, sizeof (fpregs));
+						  &fpregs, sizeof (fpregs), regcache);
     }
 
   return note_data;
@@ -4423,9 +4438,9 @@ linux_nat_make_corefile_notes (bfd *obfd
 		       psargs_end - string_end);
 	    }
 	}
-      note_data = (char *) elfcore_write_prpsinfo (obfd,
-						   note_data,
-						   note_size, fname, psargs);
+      note_data = (char *) linux_elfcore_write_prpsinfo (obfd, note_data,
+							 note_size, fname,
+							 psargs);
     }
 
   /* Dump information for threads.  */
Index: gdb-7.0.50.20100115/gdb/linux-nat.h
===================================================================
--- gdb-7.0.50.20100115.orig/gdb/linux-nat.h	2010-01-15 03:17:07.000000000 +0100
+++ gdb-7.0.50.20100115/gdb/linux-nat.h	2010-01-15 03:21:26.000000000 +0100
@@ -169,3 +169,12 @@ struct siginfo *linux_nat_get_siginfo (p
 
 /* Compute and return the processor core of a given thread.  */
 int linux_nat_core_of_thread_1 (ptid_t ptid);
+
+/* These functions make elfcore note sections.
+   They may get overriden by code adjusting data for multi-target builds.  */
+extern char *(*linux_elfcore_write_prpsinfo)
+  (bfd *, char *, int *, const char *, const char *);
+extern char *(*linux_elfcore_write_prstatus)
+  (bfd *, char *, int *, long, int, const void *);
+extern char *(*linux_elfcore_write_prfpreg)
+  (bfd *, char *, int *, const void *, int, struct regcache *);