Add support for an ARM specific 'y' section attribute flag to mark the section as NOREAD.

bfd/ChangeLog:
      * elf32-arm.c ((elf32_arm_special_sections): Remove catch of noread
      section using '.text.noread' pattern.

gas/ChangeLog:
      * config/obj-elf.c (obj_elf_change_section) : Allow arm section with
      SHF_ARM_NOREAD section flag.
      * config/tc-arm.h (md_elf_section_letter) : Implement this hook to
      handle letter 'y'.
     (arm_elf_section_letter) : Declare it.
      * config/tc-arm.c (arm_elf_section_letter): Handle letter 'y' to set
      SHF_ARM_NOREAD section flag.
      * doc/c-arm.texi (ARM section attribute 'y'): Document it.

gas/testsuite/ChangeLog:
      * gas/arm/section-execute-only.s: New test case.
      * gas/arm/section-execute-only.d: Expected output.

ld/testsuite/ChangeLog:
      * ld-arm/thumb1-noread-not-present-mixing-two-section.s: Add 'y'
      attribute usage.
      * ld-arm/thumb1-noread-present-one-section.s: Likewise.
      * ld-arm/thumb1-noread-present-two-section.s: Likewise.
      * ld-arm/thumb1-input-section-flag-match.s: Likewise.

binutils/ChangeLog:
      * readelf.c (get_elf_section_flags): Display y letter for section
      with SHF_ARM_NOREAD section flag in readelf section output.
      (process_section_headers): Add y letter in readelf section output
      key mapping for ARM architecture.

4 files changed, 39 insertions, 1 deletions

diff --git a/binutils/ChangeLog b/binutils/ChangeLog
index 24e2afe..2d23f20 100644
--- a/binutils/ChangeLog
+++ b/binutils/ChangeLog
@@ -1,3 +1,14 @@
+2016-01-20  Mickael Guene  <mickael.guene@st.com>
+
+	* readelf.c (get_elf_section_flags): Display y letter for section
+	with SHF_ARM_NOREAD section flag in readelf section output.
+	(process_section_headers): Add y letter in readelf section output
+	key mapping for ARM architecture.
+	* objdump.c (dump_section_header): Display NOREAD attributes as
+	well.
+	* doc/binutils.texi (objdump): Note that it is correct for
+	sections to have both the READONLY and NOREAD attributes.
+
 2016-01-19  John Baldwin  <jhb@FreeBSD.org>
 
 	* readelf.c (get_freebsd_elfcore_note_type): Remove unused variable.
diff --git a/binutils/doc/binutils.texi b/binutils/doc/binutils.texi
index 771100e..b173732 100644
--- a/binutils/doc/binutils.texi
+++ b/binutils/doc/binutils.texi
@@ -2125,6 +2125,11 @@ although @command{ld} relocates the sections correctly, using @samp{objdump
 Instead, it shows the usual addresses, which are implicit for the
 target.
 
+Note, in some cases it is possible for a section to have both the
+READONLY and the NOREAD attributes set.  In such cases the NOREAD
+attribute takes precedence, but @command{objdump} will report both
+since the exact setting of the flag bits might be important.
+
 @item -H
 @itemx --help
 Print a summary of the options to @command{objdump} and exit.
diff --git a/binutils/objdump.c b/binutils/objdump.c
index fa991a9..3c94a76 100644
--- a/binutils/objdump.c
+++ b/binutils/objdump.c
@@ -488,9 +488,23 @@ dump_section_header (bfd *abfd, asection *section,
     }
   PF (SEC_SMALL_DATA, "SMALL_DATA");
   if (bfd_get_flavour (abfd) == bfd_target_coff_flavour)
-    PF (SEC_COFF_SHARED, "SHARED");
+    {
+      PF (SEC_COFF_SHARED, "SHARED");
+      PF (SEC_COFF_NOREAD, "NOREAD");
+    }
+  else if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
+    {
+      /* Note - sections can have both the READONLY and NOREAD attributes
+	 set.  In this case the NOREAD takes precedence, but we report both
+	 since the user may need to know that both bits are set.  */
+      PF (SEC_ELF_NOREAD, "NOREAD");
+    }
   PF (SEC_THREAD_LOCAL, "THREAD_LOCAL");
   PF (SEC_GROUP, "GROUP");
+  if (bfd_get_arch (abfd) == bfd_arch_mep)
+    {
+      PF (SEC_MEP_VLIW, "VLIW");
+    }
 
   if ((section->flags & SEC_LINK_ONCE) != 0)
     {
diff --git a/binutils/readelf.c b/binutils/readelf.c
index b4aaf51..b3a28a8 100644
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -5430,6 +5430,9 @@ get_elf_section_flags (bfd_vma sh_flags)
 		   || elf_header.e_machine == EM_K1OM)
 		  && flag == SHF_X86_64_LARGE)
 		*p = 'l';
+	      else if (elf_header.e_machine == EM_ARM
+		       && flag == SHF_ARM_NOREAD)
+		  *p = 'y';
 	      else if (flag & SHF_MASKOS)
 		{
 		  *p = 'o';
@@ -6007,6 +6010,11 @@ process_section_headers (FILE * file)
   W (write), A (alloc), X (execute), M (merge), S (strings), l (large)\n\
   I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)\n\
   O (extra OS processing required) o (OS specific), p (processor specific)\n"));
+      else if (elf_header.e_machine == EM_ARM)
+	printf (_("Key to Flags:\n\
+  W (write), A (alloc), X (execute), M (merge), S (strings), y (noread)\n\
+  I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)\n\
+  O (extra OS processing required) o (OS specific), p (processor specific)\n"));
       else
 	printf (_("Key to Flags:\n\
   W (write), A (alloc), X (execute), M (merge), S (strings)\n\