When relaxing, update symbols at the very end of the section.

Symbols at the very end of a section were not being updated correctly
when linker relaxation takes place due to the use of '<' instead of
'<='.  Added a couple of tests to cover this behaviour.

bfd/ChangeLog:

	* elf32-avr.c (elf32_avr_relax_delete_bytes): Modify symbols
	located at the very end of the section.

ld/ChangeLog:

	* ld/testsuite/ld-avr/relax-02.d: New file.
	* ld/testsuite/ld-avr/relax-02.s: New file.
	* ld/testsuite/ld-avr/relax-03.d: New file.
	* ld/testsuite/ld-avr/relax-03.s: New file.

4 files changed, 173 insertions, 0 deletions

diff --git a/ld/testsuite/ld-avr/relax-02.d b/ld/testsuite/ld-avr/relax-02.d
new file mode 100644
index 0000000..6445709
--- /dev/null
+++ b/ld/testsuite/ld-avr/relax-02.d
@@ -0,0 +1,64 @@
+#name: AVR relaxation, symbol at end of section.
+#as: -mmcu=avrxmega2 -mlink-relax
+#ld:  -mavrxmega2 --relax
+#source: relax-02.s
+#objdump: -tzd
+#target: avr-*-*
+
+.*:     file format elf32-avr
+
+SYMBOL TABLE:
+#...
+00000000 l     F \.text	[0-9a-f]+ local_start
+0000000a l     F \.text	[0-9a-f]+ local_func_1
+00000014 l     F \.text	[0-9a-f]+ local_func_2
+0000001e l     F \.text	[0-9a-f]+ local_func_3
+00000032 l       \.text	00000000 local_end_label
+00000028 g       \.text	00000000 dest
+#...
+00000014 g     F \.text	[0-9a-f]+ func_2
+#...
+00000000 g     F \.text	[0-9a-f]+ _start
+00000032 g       \.text	00000000 end_label
+0000000a g     F \.text	[0-9a-f]+ func_1
+#...
+0000001e g     F \.text	[0-9a-f]+ func_3
+
+
+
+Disassembly of section \.text:
+
+00000000 <_start>:
+   0:	00 00       	nop
+   2:	00 00       	nop
+   4:	00 00       	nop
+   6:	00 00       	nop
+   8:	00 00       	nop
+
+0000000a <func_1>:
+   a:	00 00       	nop
+   c:	00 00       	nop
+   e:	00 00       	nop
+  10:	00 00       	nop
+  12:	00 00       	nop
+
+00000014 <func_2>:
+  14:	00 00       	nop
+  16:	08 c0       	rjmp	\.\+16     	; 0x28 <dest>
+  18:	07 c0       	rjmp	\.\+14     	; 0x28 <dest>
+  1a:	06 c0       	rjmp	\.\+12     	; 0x28 <dest>
+  1c:	00 00       	nop
+
+0000001e <func_3>:
+  1e:	00 00       	nop
+  20:	00 00       	nop
+  22:	00 00       	nop
+  24:	00 00       	nop
+  26:	00 00       	nop
+
+00000028 <dest>:
+  28:	00 00       	nop
+  2a:	00 00       	nop
+  2c:	00 00       	nop
+  2e:	00 00       	nop
+  30:	00 00       	nop
diff --git a/ld/testsuite/ld-avr/relax-02.s b/ld/testsuite/ld-avr/relax-02.s
new file mode 100644
index 0000000..57fb7f6
--- /dev/null
+++ b/ld/testsuite/ld-avr/relax-02.s
@@ -0,0 +1,65 @@
+        .section ".text", "ax",@progbits
+        .global _start, dest, end_label
+        .global func_1, func_2, func_3
+
+_start:
+local_start:
+        nop
+        nop
+        nop
+        nop
+        nop
+        .type   _start, @function
+        .size   _start, .-_start
+
+        .type   local_start, @function
+        .size   local_start, .-local_start
+
+func_1:
+local_func_1:
+        nop
+        nop
+        nop
+        nop
+        nop
+        .type   func_1, @function
+        .size   func_1, .-func_1
+
+        .type   local_func_1, @function
+        .size   local_func_1, .-local_func_1
+
+func_2:
+local_func_2:
+        nop
+        jmp     dest
+        jmp     dest
+        jmp     dest
+        nop
+        .type   func_2, @function
+        .size   func_2, .-func_2
+
+        .type   local_func_2, @function
+        .size   local_func_2, .-local_func_2
+
+func_3:
+local_func_3:
+        nop
+        nop
+        nop
+        nop
+        nop
+        .type   func_3, @function
+        .size   func_3, .-func_3
+
+        .type   local_func_3, @function
+        .size   local_func_3, .-local_func_3
+
+dest:
+        nop
+        nop
+        nop
+        nop
+        nop
+
+end_label:
+local_end_label:
diff --git a/ld/testsuite/ld-avr/relax-03.d b/ld/testsuite/ld-avr/relax-03.d
new file mode 100644
index 0000000..a538c04
--- /dev/null
+++ b/ld/testsuite/ld-avr/relax-03.d
@@ -0,0 +1,26 @@
+#name: AVR relaxation, single function in section.
+#as: -mmcu=avrxmega2 -mlink-relax
+#ld:  -mavrxmega2 --relax
+#source: relax-03.s
+#objdump: -tzd
+#target: avr-*-*
+
+.*:     file format elf32-avr
+
+SYMBOL TABLE:
+#...
+00000000 l     F .text	[0-9a-f]+ local_start
+0000000a l       .text	00000000 local_end_label
+#...
+00000000 g     F \.text	[0-9a-f]+ _start
+0000000a g       \.text	00000000 end_label
+#...
+
+Disassembly of section \.text:
+
+00000000 <_start>:
+   0:	00 00       	nop
+   2:	03 c0       	rjmp	\.\+6      	; 0xa <.*>
+   4:	02 c0       	rjmp	\.\+4      	; 0xa <.*>
+   6:	01 c0       	rjmp	\.\+2      	; 0xa <.*>
+   8:	00 00       	nop
diff --git a/ld/testsuite/ld-avr/relax-03.s b/ld/testsuite/ld-avr/relax-03.s
new file mode 100644
index 0000000..0993502
--- /dev/null
+++ b/ld/testsuite/ld-avr/relax-03.s
@@ -0,0 +1,18 @@
+        .section ".text", "ax",@progbits
+        .global _start, end_label
+
+_start:
+local_start:
+        nop
+        jmp     end_label
+        jmp     end_label
+        jmp     end_label
+        nop
+        .type   _start, @function
+        .size   _start, .-_start
+
+        .type   local_start, @function
+        .size   local_start, .-local_start
+
+end_label:
+local_end_label: