ld/

* ldlang.c (lang_new_phdr): Check PHDRS and FILEHDR in loadable
	segments do not appear after a different loadable segment.
	* ld.texinfo (PHDRS): Document order of processing segments.
	Document where PHDRS and FILEHDR may appear.

	ld/testsuite/
	* ld-scripts/phdrs3.d: New.
	* ld-scripts/phdrs3.t: New.
	* ld-scripts/phdrs3.exp: New.

ld/ChangeLog

@@ -1,3 +1,10 @@
+2009-10-06  Nathan Sidwell  <nathan@codesourcery.com>
+
+	* ldlang.c (lang_new_phdr): Check PHDRS and FILEHDR in loadable
+	segments do not appear after a different loadable segment.
+	* ld.texinfo (PHDRS): Document order of processing segments.
+	Document where PHDRS and FILEHDR may appear.
+
 2009-10-03  Alan Modra  <amodra@bigpond.net.au>
 
 	* emultempl/ppc32elf.em (emit_stub_syms): Init to -1.

ld/ld.texinfo

@@ -4710,7 +4710,8 @@ The @var{name} is used only for reference in the @code{SECTIONS} command
 of the linker script.  It is not put into the output file.  Program
 header names are stored in a separate name space, and will not conflict
 with symbol names, file names, or section names.  Each program header
-must have a distinct name.
+must have a distinct name.  The headers are processed in order and it
+is usual for them to map to sections in ascending load address order.
 
 Certain program header types describe segments of memory which the
 system loader will load from the file.  In the linker script, you
@@ -4734,11 +4735,12 @@ segment at all.
 
 @kindex FILEHDR
 @kindex PHDRS
-You may use the @code{FILEHDR} and @code{PHDRS} keywords appear after
+You may use the @code{FILEHDR} and @code{PHDRS} keywords after
 the program header type to further describe the contents of the segment.
 The @code{FILEHDR} keyword means that the segment should include the ELF
 file header.  The @code{PHDRS} keyword means that the segment should
-include the ELF program headers themselves.
+include the ELF program headers themselves.  If applied to a loadable
+segment (@code{PT_LOAD}), it must be the first loadable segment.
 
 The @var{type} may be one of the following.  The numbers indicate the
 value of the keyword.

ld/ldlang.c

@@ -6765,6 +6765,7 @@ lang_new_phdr (const char *name,
 	       etree_type *flags)
 {
   struct lang_phdr *n, **pp;
+  bfd_boolean hdrs;
 
   n = (struct lang_phdr *) stat_alloc (sizeof (struct lang_phdr));
   n->next = NULL;
@@ -6774,9 +6775,16 @@ lang_new_phdr (const char *name,
   n->phdrs = phdrs;
   n->at = at;
   n->flags = flags;
+  
+  hdrs = n->type == 1 && (phdrs || filehdr);
 
   for (pp = &lang_phdr_list; *pp != NULL; pp = &(*pp)->next)
-    ;
+    if (hdrs && (*pp)->type == 1)
+      {
+	einfo (_("%X%P:%S: PHDRS and FILEHDR are only permitted for the first PT_LOAD segment\n"));
+	hdrs = FALSE;
+      }
+
   *pp = n;
 }
 

ld/testsuite/ld-scripts/phdrs3.d

@@ -0,0 +1,4 @@
+# name: PHDRS headers
+# source: phdrs.s
+# ld: -T phdrs3.t
+# error: \A[^ \n:]*:[^:\n]*:5: PHDRS and FILEHDR are only permitted for the first PT_LOAD segment\Z

ld/testsuite/ld-scripts/phdrs3.exp

@@ -0,0 +1,38 @@
+# Test PHDRS in a linker script.
+# By Nathan Sidwell <nathan@codesourcery.com>
+#   Copyright 2009 Free Software Foundation, Inc.
+#
+# This file is part of the GNU Binutils.
+#
+# 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
+# MA 02110-1301, USA.
+
+# PHDRS is only meaningful for ELF.
+if ![is_elf_format] {
+    return
+}
+
+load_lib ld-lib.exp
+
+set testname "PHDRS headers"
+
+set old_ldflags $LDFLAGS
+if { [istarget spu*-*-*] } {
+    set LDFLAGS "$LDFLAGS --no-overlays"
+}
+
+run_dump_test "phdrs3"
+
+set LDFLAGS $old_ldflags

ld/testsuite/ld-scripts/phdrs3.t

@@ -0,0 +1,16 @@
+PHDRS
+{
+  data PT_LOAD ;
+  header PT_PHDR PHDRS ; /* OK */
+  text PT_LOAD FILEHDR PHDRS ;
+}
+
+SECTIONS
+{
+  /* This test will fail on architectures where the startaddress below
+     is less than the constant MAXPAGESIZE.  */
+  . = 0x800000 + SIZEOF_HEADERS;
+  .text : { *(.text) } :text
+  .data : { *(.data) } :data
+  /DISCARD/ : { *(.*) }
+}