Add support for ARM's NOREAD section flag.

include/elf
     * arm.h: Add arm SHF_ARM_NOREAD section flag.

bfd  * bfd-in2.h: Regenerate.
     * section.c: Add SEC_ELF_NOREAD.
     * elf32-arm.c (elf32_arm_post_process_headers): Only set
     PF_X attribute if a segment only contains section with
     SHF_ARM_NOREAD flag.
     (elf32_arm_fake_sections): Add SEC_ELF_NOREAD conversion.
     (elf32_arm_section_flags): New function to convert SHF_ARM_NOREAD
     to bfd flag.
     (elf32_arm_lookup_section_flags): New function to allow
     INPUT_SECTION_FLAGS directive with SHF_ARM_NOREAD flag.
     (elf32_arm_special_sections): Add special sections array
     to catch section prefix by '.text.noread' pattern.

ld/testsuite
     * ld-arm/arm-elf.exp: New tests.
     * ld-arm/thumb1-input-section-flag-match.d: New
     * ld-arm/thumb1-input-section-flag-match.s: New
     * ld-arm/thumb1-noread-not-present-mixing-two-section.d: New
     * ld-arm/thumb1-noread-not-present-mixing-two-section.s: New
     * ld-arm/thumb1-noread-present-one-section.d: New
     * ld-arm/thumb1-noread-present-one-section.s: New
     * ld-arm/thumb1-noread-present-two-section.d: New
     * ld-arm/thumb1-noread-present-two-section.s: New

binutils
	* readelf.c (get_elf_section_flags): Add support for ARM specific
	section flags.

11 files changed, 141 insertions, 0 deletions

diff --git a/ld/testsuite/ChangeLog b/ld/testsuite/ChangeLog
index ac3d142..d5982b9 100644
--- a/ld/testsuite/ChangeLog
+++ b/ld/testsuite/ChangeLog
@@ -1,3 +1,15 @@
+2015-12-22 Mickael Guene <mickael.guene@st.com>
+
+	* ld-arm/arm-elf.exp: New tests.
+	* ld-arm/thumb1-input-section-flag-match.d: New
+	* ld-arm/thumb1-input-section-flag-match.s: New
+	* ld-arm/thumb1-noread-not-present-mixing-two-section.d: New
+	* ld-arm/thumb1-noread-not-present-mixing-two-section.s: New
+	* ld-arm/thumb1-noread-present-one-section.d: New
+	* ld-arm/thumb1-noread-present-one-section.s: New
+	* ld-arm/thumb1-noread-present-two-section.d: New
+	* ld-arm/thumb1-noread-present-two-section.s: New
+
 2015-12-16  Mickael Guene <mickael.guene@st.com>
 
 	* ld-arm/arm-elf.exp (armelftests_common): Add new relocations
diff --git a/ld/testsuite/ld-arm/arm-elf.exp b/ld/testsuite/ld-arm/arm-elf.exp
index 23c9e57..a970dba 100644
--- a/ld/testsuite/ld-arm/arm-elf.exp
+++ b/ld/testsuite/ld-arm/arm-elf.exp
@@ -299,6 +299,18 @@ set armelftests_nonacl {
     {"TLS shared library gdesc local" "--no-fix-arm1176 -shared -T arm-dyn.ld" "" "" {tls-lib-loc.s}
      {{objdump -fdw tls-lib-loc.d} {objdump -Rw tls-lib-loc.r}}
      "tls-lib-loc.so"}
+    {"PF_R not present when one noread section" "-static -T arm.ld" "" "" {thumb1-noread-present-one-section.s}
+     {{readelf -l thumb1-noread-present-one-section.d}}
+     "thumb1-noread-present-one-section"}
+    {"PF_R not present when two noread sections" "-static -T arm.ld" "" "" {thumb1-noread-present-two-section.s}
+     {{readelf -l thumb1-noread-present-two-section.d}}
+     "thumb1-noread-present-two-section"}
+    {"PF_R present when mixing noread section with read section" "-static -T arm.ld" "" "" {thumb1-noread-not-present-mixing-two-section.s}
+     {{readelf -l thumb1-noread-not-present-mixing-two-section.d}}
+     "thumb1-noread-not-present-mixing-two-section"}
+    {"Match SHF_ARM_NOREAD with INPUT_SECTION_FLAGS directive" "-static -T arm_noread.ld" "" "" {thumb1-input-section-flag-match.s}
+     {{readelf -l thumb1-input-section-flag-match.d}}
+     "thumb1-noread-not-present-mixing-two-section"}
 }
 
 run_ld_link_tests $armelftests_common
diff --git a/ld/testsuite/ld-arm/arm_noread.ld b/ld/testsuite/ld-arm/arm_noread.ld
new file mode 100644
index 0000000..3ff17bc
--- /dev/null
+++ b/ld/testsuite/ld-arm/arm_noread.ld
@@ -0,0 +1,32 @@
+/* Script for ld testsuite.  */
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+MEMORY
+{
+ read_memory   (rx)   : ORIGIN = 0x00008000, LENGTH = 4M
+ noread_memory (!rx)  : ORIGIN = 0x00800000, LENGTH = 4M
+}
+SECTIONS
+{
+  /* Read-only sections, merged into text segment: */
+  PROVIDE (__executable_start = 0x8000); . = 0x8000;
+  .text.noread      :
+    {
+        INPUT_SECTION_FLAGS (SHF_ARM_NOREAD) *(.text*)
+    } > noread_memory
+  .text           :
+  {
+    *(.before)
+    *(.text)
+    *(.after)
+    *(.ARM.extab*)
+    *(.glue_7)
+    *(.v4_bx)
+  } > read_memory
+  .ARM.exidx : { *(.ARM.exidx*) }
+  . = 0x9000;
+  .got            : { *(.got) *(.got.plt)}
+  . = 0x12340000;
+  .far : { *(.far) }
+  .ARM.attribues 0 : { *(.ARM.atttributes) }
+}
diff --git a/ld/testsuite/ld-arm/thumb1-input-section-flag-match.d b/ld/testsuite/ld-arm/thumb1-input-section-flag-match.d
new file mode 100644
index 0000000..e25a4f4
--- /dev/null
+++ b/ld/testsuite/ld-arm/thumb1-input-section-flag-match.d
@@ -0,0 +1,6 @@
+#...
+Program Headers:
+#...
+  LOAD           0x000000 0x00000000 0x00000000 0x08002 0x08002 R E 0x10000
+  LOAD           0x010000 0x00800000 0x00800000 0x00002 0x00002   E 0x10000
+#...
diff --git a/ld/testsuite/ld-arm/thumb1-input-section-flag-match.s b/ld/testsuite/ld-arm/thumb1-input-section-flag-match.s
new file mode 100644
index 0000000..ac7c89f
--- /dev/null
+++ b/ld/testsuite/ld-arm/thumb1-input-section-flag-match.s
@@ -0,0 +1,18 @@
+	.text
+	.section .text.noread
+	.arch armv6s-m
+	.syntax unified
+	.global	_start
+	.thumb_func
+	.type	_start, %function
+_start:
+	bx lr
+
+	.text
+	.arch armv6s-m
+	.syntax unified
+	.global	foo
+	.thumb_func
+	.type	foo, %function
+foo:
+	bx lr
diff --git a/ld/testsuite/ld-arm/thumb1-noread-not-present-mixing-two-section.d b/ld/testsuite/ld-arm/thumb1-noread-not-present-mixing-two-section.d
new file mode 100644
index 0000000..9150576
--- /dev/null
+++ b/ld/testsuite/ld-arm/thumb1-noread-not-present-mixing-two-section.d
@@ -0,0 +1,5 @@
+#...
+Program Headers:
+#...
+  LOAD           0x000000 0x00000000 0x00000000 0x08004 0x08004 R E 0x10000
+#...
diff --git a/ld/testsuite/ld-arm/thumb1-noread-not-present-mixing-two-section.s b/ld/testsuite/ld-arm/thumb1-noread-not-present-mixing-two-section.s
new file mode 100644
index 0000000..ac7c89f
--- /dev/null
+++ b/ld/testsuite/ld-arm/thumb1-noread-not-present-mixing-two-section.s
@@ -0,0 +1,18 @@
+	.text
+	.section .text.noread
+	.arch armv6s-m
+	.syntax unified
+	.global	_start
+	.thumb_func
+	.type	_start, %function
+_start:
+	bx lr
+
+	.text
+	.arch armv6s-m
+	.syntax unified
+	.global	foo
+	.thumb_func
+	.type	foo, %function
+foo:
+	bx lr
diff --git a/ld/testsuite/ld-arm/thumb1-noread-present-one-section.d b/ld/testsuite/ld-arm/thumb1-noread-present-one-section.d
new file mode 100644
index 0000000..1faf40c
--- /dev/null
+++ b/ld/testsuite/ld-arm/thumb1-noread-present-one-section.d
@@ -0,0 +1,5 @@
+#...
+Program Headers:
+#...
+  LOAD           0x000000 0x00000000 0x00000000 0x08002 0x08002   E 0x10000
+#...
diff --git a/ld/testsuite/ld-arm/thumb1-noread-present-one-section.s b/ld/testsuite/ld-arm/thumb1-noread-present-one-section.s
new file mode 100644
index 0000000..4be37d2
--- /dev/null
+++ b/ld/testsuite/ld-arm/thumb1-noread-present-one-section.s
@@ -0,0 +1,9 @@
+	.text
+	.section .text.noread
+	.arch armv6s-m
+	.syntax unified
+	.global	_start
+	.thumb_func
+	.type	_start, %function
+_start:
+	bx lr
diff --git a/ld/testsuite/ld-arm/thumb1-noread-present-two-section.d b/ld/testsuite/ld-arm/thumb1-noread-present-two-section.d
new file mode 100644
index 0000000..365cab0
--- /dev/null
+++ b/ld/testsuite/ld-arm/thumb1-noread-present-two-section.d
@@ -0,0 +1,5 @@
+#...
+Program Headers:
+#...
+  LOAD           0x000000 0x00000000 0x00000000 0x08004 0x08004   E 0x10000
+#...
diff --git a/ld/testsuite/ld-arm/thumb1-noread-present-two-section.s b/ld/testsuite/ld-arm/thumb1-noread-present-two-section.s
new file mode 100644
index 0000000..a97f379
--- /dev/null
+++ b/ld/testsuite/ld-arm/thumb1-noread-present-two-section.s
@@ -0,0 +1,19 @@
+	.text
+	.section .text.noread.first
+	.arch armv6s-m
+	.syntax unified
+	.global	_start
+	.thumb_func
+	.type	_start, %function
+_start:
+	bx lr
+
+	.text
+	.section .text.noread.second
+	.arch armv6s-m
+	.syntax unified
+	.global	foo
+	.thumb_func
+	.type	foo, %function
+foo:
+	bx lr