[BFD][AARCH64]Fix MOVW_SABS_G(0,1,2) relocation overflow check.

For these three relocations, 17 bit signed value should be used, instead of
16 bit. The bitsize field is changed from 16 to 17, this field in aarch64
backend is used for overflow check only.

bfd/

2016-02-26  Renlin Li  <renlin.li@arm.com>

    * elfnn-aarch64.c (elfNN_aarch64_howto_table): Fix signed overflow
    check for MOVW_SABS_G0, MOVW_SABS_G1, MOVW_SABS_G2.

ld/

2016-02-26  Renlin Li  <renlin.li@arm.com>

    * testsuite/ld-aarch64/aarch64-elf.exp: Run new testcases.
    * testsuite/ld-aarch64/emit-relocs-270.d: Update to use new boundary.
    * testsuite/ld-aarch64/emit-relocs-271.d: Likewise.
    * testsuite/ld-aarch64/emit-relocs-272.d: Likewise.
    * testsuite/ld-aarch64/emit-relocs-270-overflow.d: New.
    * testsuite/ld-aarch64/emit-relocs-270-overflow.s: New.
    * testsuite/ld-aarch64/emit-relocs-271-overflow.d: New.
    * testsuite/ld-aarch64/emit-relocs-271-overflow.s: New.
    * testsuite/ld-aarch64/emit-relocs-272-overflow.d: New.
    * testsuite/ld-aarch64/emit-relocs-272-overflow.s: New.

10 files changed, 58 insertions, 26 deletions

diff --git a/ld/testsuite/ld-aarch64/aarch64-elf.exp b/ld/testsuite/ld-aarch64/aarch64-elf.exp
index d0b33cf..37ce48c 100644
--- a/ld/testsuite/ld-aarch64/aarch64-elf.exp
+++ b/ld/testsuite/ld-aarch64/aarch64-elf.exp
@@ -96,8 +96,11 @@ run_dump_test "emit-relocs-269"
 run_dump_test "emit-relocs-269-bad"
 run_dump_test "emit-relocs-270"
 run_dump_test "emit-relocs-270-bad"
+run_dump_test "emit-relocs-270-overflow"
 run_dump_test "emit-relocs-271"
+run_dump_test "emit-relocs-271-overflow"
 run_dump_test "emit-relocs-272"
+run_dump_test "emit-relocs-272-overflow"
 run_dump_test "emit-relocs-273"
 run_dump_test "emit-relocs-274"
 run_dump_test "emit-relocs-275"
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-270-overflow.d b/ld/testsuite/ld-aarch64/emit-relocs-270-overflow.d
new file mode 100644
index 0000000..991dc1f
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-270-overflow.d
@@ -0,0 +1,5 @@
+#source: emit-relocs-270-overflow.s
+#ld: -T relocs.ld --defsym tempy=0x10000 --defsym tempy1=-0x10001 -e0 --emit-relocs
+#objdump: -dr
+#error: .*\(.text\+0x\d+\): relocation truncated to fit: R_AARCH64_MOVW_SABS_G0 against symbol `tempy' .*
+#error: .*\(.text\+0x\d+\): relocation truncated to fit: R_AARCH64_MOVW_SABS_G0 against symbol `tempy1' .*
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-270-overflow.s b/ld/testsuite/ld-aarch64/emit-relocs-270-overflow.s
new file mode 100644
index 0000000..acc9b2d
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-270-overflow.s
@@ -0,0 +1,6 @@
+.comm   gempy,4,4
+.text
+
+	movz	x4, :abs_g0_s:tempy
+	movz	x5, :abs_g0_s:tempy1
+
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-270.d b/ld/testsuite/ld-aarch64/emit-relocs-270.d
index 442150e..34f7a2a 100644
--- a/ld/testsuite/ld-aarch64/emit-relocs-270.d
+++ b/ld/testsuite/ld-aarch64/emit-relocs-270.d
@@ -1,14 +1,13 @@
 #source: emit-relocs-270.s
-#ld: -T relocs.ld --defsym tempy=0x1012 --defsym tempy2=0x4500 --defsym tempy3=-292  -e0 --emit-relocs
-#objdump: -dr -Mno-aliases
+#ld: -T relocs.ld --defsym tempy=0xffff --defsym tempy2=0x4500 --defsym tempy3=-0x10000  -e0 --emit-relocs
+#objdump: -dr
 
 #...
  +10000:	8a000000 	and	x0, x0, x0
  +10004:	92400000 	and	x0, x0, #0x1
- +10008:	d2820244 	movz	x4, #0x1012
-	+10008: R_AARCH64_MOVW_SABS_G0	tempy
- +1000c:	d288a007 	movz	x7, #0x4500
-	+1000c: R_AARCH64_MOVW_SABS_G0	tempy2
- +10010:	92802471 	movn	x17, #0x123
-	+10010: R_AARCH64_MOVW_SABS_G0	tempy3
-
+ +10008:	d29fffe4 	mov	x4, #0xffff                	// #65535
+			10008: R_AARCH64_MOVW_SABS_G0	tempy
+ +1000c:	d288a007 	mov	x7, #0x4500                	// #17664
+			1000c: R_AARCH64_MOVW_SABS_G0	tempy2
+ +10010:	929ffff1 	mov	x17, #0xffffffffffff0000    	// #-65536
+			10010: R_AARCH64_MOVW_SABS_G0	tempy3
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-271-overflow.d b/ld/testsuite/ld-aarch64/emit-relocs-271-overflow.d
new file mode 100644
index 0000000..b526ca4
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-271-overflow.d
@@ -0,0 +1,5 @@
+#source: emit-relocs-271-overflow.s
+#ld: -T relocs.ld --defsym tempy=0x100000000 --defsym tempy1=-0x100000001 -e0 --emit-relocs
+#objdump: -dr
+#error: .*\(.text\+0x\d+\): relocation truncated to fit: R_AARCH64_MOVW_SABS_G1 against symbol `tempy' .*
+#error: .*\(.text\+0x\d+\): relocation truncated to fit: R_AARCH64_MOVW_SABS_G1 against symbol `tempy1' .*
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-271-overflow.s b/ld/testsuite/ld-aarch64/emit-relocs-271-overflow.s
new file mode 100644
index 0000000..47d0686
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-271-overflow.s
@@ -0,0 +1,5 @@
+.comm   gempy,4,4
+.text
+
+	movz	x4, :abs_g1_s:tempy
+	movz	x5, :abs_g1_s:tempy1
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-271.d b/ld/testsuite/ld-aarch64/emit-relocs-271.d
index 1f34820..f71cd02 100644
--- a/ld/testsuite/ld-aarch64/emit-relocs-271.d
+++ b/ld/testsuite/ld-aarch64/emit-relocs-271.d
@@ -1,14 +1,13 @@
 #source: emit-relocs-271.s
-#ld: -T relocs.ld --defsym tempy=0x1012 --defsym tempy2=0x674500 --defsym tempy3=-292  -e0 --emit-relocs
-#objdump: -dr -Mno-aliases
+#ld: -T relocs.ld --defsym tempy=0xffffffff --defsym tempy2=0x674500 --defsym tempy3=-0x100000000  -e0 --emit-relocs
+#objdump: -dr
 
 #...
  +10000:	8a000000 	and	x0, x0, x0
  +10004:	92400000 	and	x0, x0, #0x1
- +10008:	d2a00004 	movz	x4, #0x0, lsl #16
-	+10008: R_AARCH64_MOVW_SABS_G1	tempy
- +1000c:	d2a00ce7 	movz	x7, #0x67, lsl #16
-	+1000c: R_AARCH64_MOVW_SABS_G1	tempy2
- +10010:	92a00011 	movn	x17, #0x0, lsl #16
-	+10010: R_AARCH64_MOVW_SABS_G1	tempy3
-
+ +10008:	d2bfffe4 	mov	x4, #0xffff0000            	// #4294901760
+			10008: R_AARCH64_MOVW_SABS_G1	tempy
+ +1000c:	d2a00ce7 	mov	x7, #0x670000              	// #6750208
+			1000c: R_AARCH64_MOVW_SABS_G1	tempy2
+ +10010:	92bffff1 	mov	x17, #0xffffffff0000ffff    	// #-4294901761
+			10010: R_AARCH64_MOVW_SABS_G1	tempy3
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-272-overflow.d b/ld/testsuite/ld-aarch64/emit-relocs-272-overflow.d
new file mode 100644
index 0000000..a035554
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-272-overflow.d
@@ -0,0 +1,5 @@
+#source: emit-relocs-272-overflow.s
+#ld: -T relocs.ld --defsym tempy=0x1000000000000 --defsym tempy1=-0x1000000000001 -e0 --emit-relocs
+#objdump: -dr
+#error: .*\(.text\+0x\d+\): relocation truncated to fit: R_AARCH64_MOVW_SABS_G2 against symbol `tempy' .*
+#error: .*\(.text\+0x\d+\): relocation truncated to fit: R_AARCH64_MOVW_SABS_G2 against symbol `tempy1' .*
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-272-overflow.s b/ld/testsuite/ld-aarch64/emit-relocs-272-overflow.s
new file mode 100644
index 0000000..ac79465
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-272-overflow.s
@@ -0,0 +1,5 @@
+.comm   gempy,4,4
+.text
+
+	movz	x4, :abs_g2_s:tempy
+	movz	x5, :abs_g2_s:tempy1
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-272.d b/ld/testsuite/ld-aarch64/emit-relocs-272.d
index 011ead5..94c037f 100644
--- a/ld/testsuite/ld-aarch64/emit-relocs-272.d
+++ b/ld/testsuite/ld-aarch64/emit-relocs-272.d
@@ -1,14 +1,14 @@
 #source: emit-relocs-272.s
-#ld: -T relocs.ld --defsym tempy=0x1012 --defsym tempy2=-12345678912345 --defsym tempy3=-292  -e0 --emit-relocs
-#objdump: -dr -Mno-aliases
+#ld: -T relocs.ld --defsym tempy=0xffffffffffff --defsym tempy2=-12345678912345 --defsym tempy3=-0x1000000000000  -e0 --emit-relocs
+#objdump: -dr
 
 #...
  +10000:	8a000000 	and	x0, x0, x0
  +10004:	92400000 	and	x0, x0, #0x1
- +10008:	d2c00004 	movz	x4, #0x0, lsl #32
-	+10008: R_AARCH64_MOVW_SABS_G2	tempy
- +1000c:	92c16747 	movn	x7, #0xb3a, lsl #32
-	+1000c: R_AARCH64_MOVW_SABS_G2	tempy2
- +10010:	92c00011 	movn	x17, #0x0, lsl #32
-	+10010: R_AARCH64_MOVW_SABS_G2	tempy3
+ +10008:	d2dfffe4 	mov	x4, #0xffff00000000        	// #281470681743360
+			10008: R_AARCH64_MOVW_SABS_G2	tempy
+ +1000c:	92c16747 	mov	x7, #0xfffff4c5ffffffff    	// #-12343736008705
+			1000c: R_AARCH64_MOVW_SABS_G2	tempy2
+ +10010:	92dffff1 	mov	x17, #0xffff0000ffffffff    	// #-281470681743361
+			10010: R_AARCH64_MOVW_SABS_G2	tempy3