[LD][AARCH64]Add group relocations to create PC-relative offset.

This is a patch to add linker support for group relocations to create a
16, 32, 48, or 64 bit PC-relative offset inline.

The following relocations are added along with the test cases:
BFD_RELOC_AARCH64_MOVW_PREL_G0, BFD_RELOC_AARCH64_MOVW_PREL_G0_NC,
BFD_RELOC_AARCH64_MOVW_PREL_G1, BFD_RELOC_AARCH64_MOVW_PREL_G1_NC,
BFD_RELOC_AARCH64_MOVW_PREL_G2, BFD_RELOC_AARCH64_MOVW_PREL_G2_NC,
BFD_RELOC_AARCH64_MOVW_PREL_G3.

bfd/

2018-01-24  Renlin Li  <renlin.li@arm.com>

	* elfnn-aarch64.c (elfNN_aarch64_final_link_relocate): Add support for
	BFD_RELOC_AARCH64_MOVW_PREL_G0, BFD_RELOC_AARCH64_MOVW_PREL_G0_NC,
	BFD_RELOC_AARCH64_MOVW_PREL_G1, BFD_RELOC_AARCH64_MOVW_PREL_G1_NC,
	BFD_RELOC_AARCH64_MOVW_PREL_G2, BFD_RELOC_AARCH64_MOVW_PREL_G2_NC,
	BFD_RELOC_AARCH64_MOVW_PREL_G3.
	* elfxx-aarch64.c (_bfd_aarch64_elf_put_addend): Likewise.
	(_bfd_aarch64_elf_resolve_relocation): Likewise.

ld/

2018-01-24  Renlin Li  <renlin.li@arm.com>

	* testsuite/ld-aarch64/aarch64-elf.exp: Run new testes.
	* testsuite/ld-aarch64/emit-relocs-287.s: Fix test case.
	* testsuite/ld-aarch64/emit-relocs-287.d: Fix expected output.
	* testsuite/ld-aarch64/emit-relocs-287-overflow.s: New.
	* testsuite/ld-aarch64/emit-relocs-287-overflow.d: New.
	* testsuite/ld-aarch64/emit-relocs-288.d: New.
	* testsuite/ld-aarch64/emit-relocs-288.s: New.
	* testsuite/ld-aarch64/emit-relocs-289.d: New.
	* testsuite/ld-aarch64/emit-relocs-289.s: New.
	* testsuite/ld-aarch64/emit-relocs-289-overflow.s: New.
	* testsuite/ld-aarch64/emit-relocs-289-overflow.d: New.
	* testsuite/ld-aarch64/emit-relocs-290.d: New.
	* testsuite/ld-aarch64/emit-relocs-290.s: New.
	* testsuite/ld-aarch64/emit-relocs-291.d: New.
	* testsuite/ld-aarch64/emit-relocs-291.s: New.
	* testsuite/ld-aarch64/emit-relocs-291-overflow.s: New.
	* testsuite/ld-aarch64/emit-relocs-291-overflow.d: New.
	* testsuite/ld-aarch64/emit-relocs-292.d: New.
	* testsuite/ld-aarch64/emit-relocs-292.s: New.
	* testsuite/ld-aarch64/emit-relocs-293.d: New.
	* testsuite/ld-aarch64/emit-relocs-293.s: New.

21 files changed, 137 insertions, 16 deletions

diff --git a/ld/testsuite/ld-aarch64/aarch64-elf.exp b/ld/testsuite/ld-aarch64/aarch64-elf.exp
index f310893..2602a43 100644
--- a/ld/testsuite/ld-aarch64/aarch64-elf.exp
+++ b/ld/testsuite/ld-aarch64/aarch64-elf.exp
@@ -143,7 +143,17 @@ run_dump_test_lp64 "emit-relocs-284"
 run_dump_test_lp64 "emit-relocs-285"
 run_dump_test_lp64 "emit-relocs-286"
 run_dump_test_lp64 "emit-relocs-286-bad"
-# 287-298 are not done yet
+run_dump_test_lp64 "emit-relocs-287"
+run_dump_test_lp64 "emit-relocs-287-overflow"
+run_dump_test_lp64 "emit-relocs-288"
+run_dump_test_lp64 "emit-relocs-289"
+run_dump_test_lp64 "emit-relocs-289-overflow"
+run_dump_test_lp64 "emit-relocs-290"
+run_dump_test_lp64 "emit-relocs-291"
+run_dump_test_lp64 "emit-relocs-291-overflow"
+run_dump_test_lp64 "emit-relocs-292"
+run_dump_test_lp64 "emit-relocs-293"
+# 294-298 are not done yet
 run_dump_test_lp64 "emit-relocs-299"
 # 300 is not done yet
 run_dump_test_lp64 "emit-relocs-301"
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-287-overflow.d b/ld/testsuite/ld-aarch64/emit-relocs-287-overflow.d
new file mode 100644
index 0000000..54f42c6
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-287-overflow.d
@@ -0,0 +1,5 @@
+#source: emit-relocs-287-overflow.s
+#ld: -T relocs.ld --defsym tempy=0x20000 --defsym tempy2=0x0 -e0 --emit-relocs
+#objdump: -dr
+#error: .*\(.text\+0x\d+\): relocation truncated to fit: R_AARCH64_MOVW_PREL_G0 against symbol `tempy' .*
+#error: .*\(.text\+0x\d+\): relocation truncated to fit: R_AARCH64_MOVW_PREL_G0 against symbol `tempy2' .*
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-287-overflow.s b/ld/testsuite/ld-aarch64/emit-relocs-287-overflow.s
new file mode 100644
index 0000000..999cd15
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-287-overflow.s
@@ -0,0 +1,5 @@
+.comm   gempy,4,4
+.text
+
+	movz	x4, :prel_g0:tempy
+	movz	x4, :prel_g0:tempy2
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-287.d b/ld/testsuite/ld-aarch64/emit-relocs-287.d
index 4d5fd43..a76e0e6 100644
--- a/ld/testsuite/ld-aarch64/emit-relocs-287.d
+++ b/ld/testsuite/ld-aarch64/emit-relocs-287.d
@@ -1,14 +1,10 @@
 #source: emit-relocs-287.s
-#ld: -T relocs.ld --defsym tempy=0x11000 --defsym tempy2=0x45000 --defsym tempy3=0x1234 --defsym _GOT_=0x10000 -e0 --emit-relocs
+#ld: -T relocs.ld --defsym tempy=0x1ffff --defsym tempy2=0x4 -e0 --emit-relocs
 #objdump: -dr
 
 #...
- +10000:	8a000000 	and	x0, x0, x0
- +10004:	92400000 	and	x0, x0, #0x1
- +10008:	d2820004 	movz	x4, #0x1000
-	+10008: R_AARCH64_MOVW_PREL_G0	_GOT_
- +1000c:	d28a0007 	movz	x7, #0x5000
-	+1000c: R_AARCH64_MOVW_PREL_G0	_GOT_
- +10010:	d2824691 	movz	x17, #0x1234
-	+10010: R_AARCH64_MOVW_PREL_G0	_GOT_
+ +10000:	d29fffe4 	mov	x4, #0xffff                	// #65535
+			10000: R_AARCH64_MOVW_PREL_G0	tempy
+ +10004:	929ffff1 	mov	x17, #0xffffffffffff0000    	// #-65536
+			10004: R_AARCH64_MOVW_PREL_G0	tempy2
 
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-287.s b/ld/testsuite/ld-aarch64/emit-relocs-287.s
index ae9476f..f9e53dc 100644
--- a/ld/testsuite/ld-aarch64/emit-relocs-287.s
+++ b/ld/testsuite/ld-aarch64/emit-relocs-287.s
@@ -1,9 +1,5 @@
 .comm   gempy,4,4
 .text
-
-	and	x0,x0,x0
-	and	x0,x0,#0x1
-        movz	x4, :prel_g0:tempy
-	movz	x7, :prel_g0:tempy2
-	movz	x17, :prel_g0:tempy3
+	movz	x4, :prel_g0:tempy
+	movz	x17, :prel_g0:tempy2
 
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-288.d b/ld/testsuite/ld-aarch64/emit-relocs-288.d
new file mode 100644
index 0000000..d57f1b3
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-288.d
@@ -0,0 +1,11 @@
+#source: emit-relocs-288.s
+#ld: -T relocs.ld --defsym tempy=0x1ffff --defsym tempy2=0x20000 --defsym tempy3=0x0 -e0 --emit-relocs
+#objdump: -dr
+
+#...
+ +10000:	f29fffe4 	movk	x4, #0xffff
+			10000: R_AARCH64_MOVW_PREL_G0_NC	tempy
+ +10004:	f29fff87 	movk	x7, #0xfffc
+			10004: R_AARCH64_MOVW_PREL_G0_NC	tempy2
+ +10008:	f29fff11 	movk	x17, #0xfff8
+			10008: R_AARCH64_MOVW_PREL_G0_NC	tempy3
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-288.s b/ld/testsuite/ld-aarch64/emit-relocs-288.s
new file mode 100644
index 0000000..8f556ed
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-288.s
@@ -0,0 +1,5 @@
+.comm   gempy,4,4
+.text
+	movk	x4, :prel_g0_nc:tempy
+	movk	x7, :prel_g0_nc:tempy2
+	movk	x17, :prel_g0_nc:tempy3
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-289-overflow.d b/ld/testsuite/ld-aarch64/emit-relocs-289-overflow.d
new file mode 100644
index 0000000..77a6d2a
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-289-overflow.d
@@ -0,0 +1,4 @@
+#source: emit-relocs-289-overflow.s
+#ld: -T relocs.ld --defsym tempy=0x1100000000 -e0 --emit-relocs
+#objdump: -dr
+#error: .*\(.text\+0x\d+\): relocation truncated to fit: R_AARCH64_MOVW_PREL_G1 against symbol `tempy' .*
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-289-overflow.s b/ld/testsuite/ld-aarch64/emit-relocs-289-overflow.s
new file mode 100644
index 0000000..7d9f25e
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-289-overflow.s
@@ -0,0 +1,4 @@
+.comm   gempy,4,4
+.text
+
+	movz	x4, :prel_g1:tempy
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-289.d b/ld/testsuite/ld-aarch64/emit-relocs-289.d
new file mode 100644
index 0000000..6c5ba23
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-289.d
@@ -0,0 +1,10 @@
+#source: emit-relocs-289.s
+#ld: -Ttext 0x100000000 --defsym tempy=0x1ffffffff --defsym tempy2=0x4 -e0 --emit-relocs
+#objdump: -dr
+
+#...
+ +100000000:	d2bfffe4 	mov	x4, #0xffff0000            	// #4294901760
+			100000000: R_AARCH64_MOVW_PREL_G1	tempy
+ +100000004:	92bffff1 	mov	x17, #0xffffffff0000ffff    	// #-4294901761
+			100000004: R_AARCH64_MOVW_PREL_G1	tempy2
+
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-289.s b/ld/testsuite/ld-aarch64/emit-relocs-289.s
new file mode 100644
index 0000000..ae1da9c
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-289.s
@@ -0,0 +1,4 @@
+.comm   gempy,4,4
+.text
+	movz	x4, :prel_g1:tempy
+	movz	x17, :prel_g1:tempy2
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-290.d b/ld/testsuite/ld-aarch64/emit-relocs-290.d
new file mode 100644
index 0000000..bc2c6fc
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-290.d
@@ -0,0 +1,11 @@
+#source: emit-relocs-290.s
+#ld: -Ttext=0x100000000 --defsym tempy=0x200000000 --defsym tempy2=0x1ffff0000 --defsym tempy3=0x8 -e0 --emit-relocs
+#objdump: -dr
+
+#...
+ +100000000:	f2a00004 	movk	x4, #0x0, lsl #16
+			100000000: R_AARCH64_MOVW_PREL_G1_NC	tempy
+ +100000004:	f2bfffc7 	movk	x7, #0xfffe, lsl #16
+			100000004: R_AARCH64_MOVW_PREL_G1_NC	tempy2
+ +100000008:	f2a00011 	movk	x17, #0x0, lsl #16
+			100000008: R_AARCH64_MOVW_PREL_G1_NC	tempy3
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-290.s b/ld/testsuite/ld-aarch64/emit-relocs-290.s
new file mode 100644
index 0000000..066ad64
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-290.s
@@ -0,0 +1,5 @@
+.comm   gempy,4,4
+.text
+	movk	x4, :prel_g1_nc:tempy
+	movk	x7, :prel_g1_nc:tempy2
+	movk	x17, :prel_g1_nc:tempy3
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-291-overflow.d b/ld/testsuite/ld-aarch64/emit-relocs-291-overflow.d
new file mode 100644
index 0000000..0ea3e50
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-291-overflow.d
@@ -0,0 +1,4 @@
+#source: emit-relocs-291-overflow.s
+#ld: -T relocs.ld --defsym tempy=0x10000000000000 -e0 --emit-relocs
+#objdump: -dr
+#error: .*\(.text\+0x\d+\): relocation truncated to fit: R_AARCH64_MOVW_PREL_G2 against symbol `tempy' .*
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-291-overflow.s b/ld/testsuite/ld-aarch64/emit-relocs-291-overflow.s
new file mode 100644
index 0000000..02649fa
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-291-overflow.s
@@ -0,0 +1,4 @@
+.comm   gempy,4,4
+.text
+
+	movz	x4, :prel_g2:tempy
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-291.d b/ld/testsuite/ld-aarch64/emit-relocs-291.d
new file mode 100644
index 0000000..53eb0e9
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-291.d
@@ -0,0 +1,11 @@
+#source: emit-relocs-291.s
+#ld: -Ttext 0x1000000000000 --defsym tempy=0x1ffffffffffff --defsym tempy2=0x1ffff00000000 -defsym tempy3=0x8 -e0 --emit-relocs
+#objdump: -dr
+
+#...
+ +1000000000000:	d2dfffe4 	mov	x4, #0xffff00000000        	// #281470681743360
+			1000000000000: R_AARCH64_MOVW_PREL_G2	tempy
+ +1000000000004:	d2dfffc7 	mov	x7, #0xfffe00000000        	// #281466386776064
+			1000000000004: R_AARCH64_MOVW_PREL_G2	tempy2
+ +1000000000008:	92dffff1 	mov	x17, #0xffff0000ffffffff    	// #-281470681743361
+			1000000000008: R_AARCH64_MOVW_PREL_G2	tempy3
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-291.s b/ld/testsuite/ld-aarch64/emit-relocs-291.s
new file mode 100644
index 0000000..955fe1b
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-291.s
@@ -0,0 +1,5 @@
+.comm   gempy,4,4
+.text
+	movz	x4, :prel_g2:tempy
+	movz	x7, :prel_g2:tempy2
+	movz	x17, :prel_g2:tempy3
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-292.d b/ld/testsuite/ld-aarch64/emit-relocs-292.d
new file mode 100644
index 0000000..3fbde20
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-292.d
@@ -0,0 +1,11 @@
+#source: emit-relocs-292.s
+#ld: -Ttext 0x1000000000000 --defsym tempy=0x2000000000000 --defsym tempy2=0x1ffff00000004 --defsym tempy3=0x4 -e0 --emit-relocs
+#objdump: -dr
+
+#...
+ +1000000000000:	f2c00004 	movk	x4, #0x0, lsl #32
+			1000000000000: R_AARCH64_MOVW_PREL_G2_NC	tempy
+ +1000000000004:	f2dfffe7 	movk	x7, #0xffff, lsl #32
+			1000000000004: R_AARCH64_MOVW_PREL_G2_NC	tempy2
+ +1000000000008:	f2dffff1 	movk	x17, #0xffff, lsl #32
+			1000000000008: R_AARCH64_MOVW_PREL_G2_NC	tempy3
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-292.s b/ld/testsuite/ld-aarch64/emit-relocs-292.s
new file mode 100644
index 0000000..82972df
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-292.s
@@ -0,0 +1,6 @@
+.comm   gempy,4,4
+.text
+
+	movk	x4, :prel_g2_nc:tempy
+	movk	x7, :prel_g2_nc:tempy2
+	movk	x17, :prel_g2_nc:tempy3
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-293.d b/ld/testsuite/ld-aarch64/emit-relocs-293.d
new file mode 100644
index 0000000..1e15f18
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-293.d
@@ -0,0 +1,9 @@
+#source: emit-relocs-293.s
+#ld: -Ttext 0x1000000000000 --defsym tempy=0x2000000000000000 --defsym tempy2=0x8 -e0 --emit-relocs
+#objdump: -dr
+
+#...
+ +1000000000000:	d2e3ffe4 	mov	x4, #0x1fff000000000000    	// #2305561534236983296
+			1000000000000: R_AARCH64_MOVW_PREL_G3	tempy
+ +1000000000004:	92e00007 	movn	x7, #0x0, lsl #48
+			1000000000004: R_AARCH64_MOVW_PREL_G3	tempy2
diff --git a/ld/testsuite/ld-aarch64/emit-relocs-293.s b/ld/testsuite/ld-aarch64/emit-relocs-293.s
new file mode 100644
index 0000000..d5803c1
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/emit-relocs-293.s
@@ -0,0 +1,5 @@
+.comm   gempy,4,4
+.text
+
+	movz	x4, :prel_g3:tempy
+	movz	x7, :prel_g3:tempy2