AVR/ld: Use .avr.prop data during linker relaxation.

Make use of the data held within the .avr.prop section during linker
relaxation in order to maintain the properties of the .org and .align
directives.

In relation to the .align directives, if enough bytes are deleted before
a .align directive then the alignment can be moved while still
maintaining the alignment requirement.

bfd/ChangeLog:

	* elf32-avr.c (struct elf_avr_section_data): New structure.
	(struct avr_relax_info): New structure.
	(elf_avr_new_section_hook): New function.
	(struct elf_avr_section_data): Add relax_info.
	(get_avr_relax_info): New function.
	(init_avr_relax_info): New function.
	(elf32_avr_relax_delete_bytes): Find next property record before
	deleting bytes.  When deleting don't move bytes beyond the next
	property record.
	(avr_elf32_assign_records_to_section): New function.
	(avr_property_record_compare): New function.
	(avr_load_all_property_sections): New function.
	(elf32_avr_relax_section): Load property data.  After relaxing the
	section, move any .align directives that have enough deleted bytes
	before them.
	(bfd_elf32_new_section_hook): Define.

ld/testsuite/ChangeLog:

	* ld-avr/avr-prop-1.d: New file.
	* ld-avr/avr-prop-1.s: New file.
	* ld-avr/avr-prop-2.d: New file.
	* ld-avr/avr-prop-2.s: New file.
	* ld-avr/avr-prop-3.d: New file.
	* ld-avr/avr-prop-3.s: New file.
	* ld-avr/avr-prop-4.d: New file.
	* ld-avr/avr-prop-4.s: New file.

9 files changed, 89 insertions, 0 deletions

diff --git a/ld/testsuite/ChangeLog b/ld/testsuite/ChangeLog
index 9313705..3d7fcba 100644
--- a/ld/testsuite/ChangeLog
+++ b/ld/testsuite/ChangeLog
@@ -1,3 +1,14 @@
+2015-02-25  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* ld-avr/avr-prop-1.d: New file.
+	* ld-avr/avr-prop-1.s: New file.
+	* ld-avr/avr-prop-2.d: New file.
+	* ld-avr/avr-prop-2.s: New file.
+	* ld-avr/avr-prop-3.d: New file.
+	* ld-avr/avr-prop-3.s: New file.
+	* ld-avr/avr-prop-4.d: New file.
+	* ld-avr/avr-prop-4.s: New file.
+
 2015-02-25  Oleg Endo  <olegendo@gcc.gnu.org>
 
 	* ld-sh/arch/arch_expected.txt: Regenerate.
diff --git a/ld/testsuite/ld-avr/avr-prop-1.d b/ld/testsuite/ld-avr/avr-prop-1.d
new file mode 100644
index 0000000..0c4ddc4
--- /dev/null
+++ b/ld/testsuite/ld-avr/avr-prop-1.d
@@ -0,0 +1,10 @@
+#name: AVR .avr.prop, single .org test.
+#as: -mmcu=avrxmega2 -mlink-relax
+#ld: -mavrxmega2 --relax
+#source: avr-prop-1.s
+#nm: -n
+#target: avr-*-*
+
+#...
+00000020 T dest
+#...
diff --git a/ld/testsuite/ld-avr/avr-prop-1.s b/ld/testsuite/ld-avr/avr-prop-1.s
new file mode 100644
index 0000000..a287d3e
--- /dev/null
+++ b/ld/testsuite/ld-avr/avr-prop-1.s
@@ -0,0 +1,7 @@
+        .text
+        .global _start, dest
+_start:
+        CALL    dest
+        .org    0x20
+dest:
+        nop
diff --git a/ld/testsuite/ld-avr/avr-prop-2.d b/ld/testsuite/ld-avr/avr-prop-2.d
new file mode 100644
index 0000000..a45443e
--- /dev/null
+++ b/ld/testsuite/ld-avr/avr-prop-2.d
@@ -0,0 +1,12 @@
+#name: AVR .avr.prop, multiple .org test.
+#as: -mmcu=avrxmega2 -mlink-relax
+#ld: -mavrxmega2 --relax
+#source: avr-prop-2.s
+#nm: -n
+#target: avr-*-*
+
+#...
+00000010 T label1
+00000020 T label2
+00000030 T dest
+#...
diff --git a/ld/testsuite/ld-avr/avr-prop-2.s b/ld/testsuite/ld-avr/avr-prop-2.s
new file mode 100644
index 0000000..a36eb18
--- /dev/null
+++ b/ld/testsuite/ld-avr/avr-prop-2.s
@@ -0,0 +1,13 @@
+        .text
+        .global _start, label1, label2, dest
+_start:
+        CALL    dest
+        .org    0x10
+label1:
+        CALL    dest
+        .org    0x20
+label2:
+        CALL    dest
+        .org    0x30
+dest:
+        nop
diff --git a/ld/testsuite/ld-avr/avr-prop-3.d b/ld/testsuite/ld-avr/avr-prop-3.d
new file mode 100644
index 0000000..0e1e271
--- /dev/null
+++ b/ld/testsuite/ld-avr/avr-prop-3.d
@@ -0,0 +1,10 @@
+#name: AVR .avr.prop, single .align test.
+#as: -mmcu=avrxmega2 -mlink-relax
+#ld: -mavrxmega2 --relax
+#source: avr-prop-3.s
+#nm: -n
+#target: avr-*-*
+
+#...
+00000008 T dest
+#...
diff --git a/ld/testsuite/ld-avr/avr-prop-3.s b/ld/testsuite/ld-avr/avr-prop-3.s
new file mode 100644
index 0000000..bf66a45
--- /dev/null
+++ b/ld/testsuite/ld-avr/avr-prop-3.s
@@ -0,0 +1,8 @@
+        .text
+        .global _start, dest
+_start:
+        CALL    dest
+        CALL    dest
+        .align  3
+dest:
+        NOP
diff --git a/ld/testsuite/ld-avr/avr-prop-4.d b/ld/testsuite/ld-avr/avr-prop-4.d
new file mode 100644
index 0000000..42a42c1
--- /dev/null
+++ b/ld/testsuite/ld-avr/avr-prop-4.d
@@ -0,0 +1,10 @@
+#name: AVR .avr.prop, realign .align test.
+#as: -mmcu=avrxmega2 -mlink-relax
+#ld: -mavrxmega2 --relax
+#source: avr-prop-4.s
+#nm: -n
+#target: avr-*-*
+
+#...
+00000004 T dest
+#...
diff --git a/ld/testsuite/ld-avr/avr-prop-4.s b/ld/testsuite/ld-avr/avr-prop-4.s
new file mode 100644
index 0000000..b1d532f
--- /dev/null
+++ b/ld/testsuite/ld-avr/avr-prop-4.s
@@ -0,0 +1,8 @@
+        .text
+        .global _start, dest
+_start:
+        CALL    dest
+        CALL    dest
+        .align  2
+dest:
+        NOP