Add -mrelax-relocations= to x86 assembler

The x86 relax relocations introduced in binutils 2.26 aren't supported
by linker on Solaris older than Solaris 12.  To use x86 assembler with
older Solaris linker, this patch adds

1. A command line option -mrelax-relocations= to x86 assembler to
control whether to generate relax relocations.
2. A configure option --enable-x86-relax-relocations to decide whether
x86 assembler should generate relax relocations by default.  It is
defaulted to yes, except for x86 Solaris targets older than Solaris 12.

gas/

	PR gas/19520
	* NEWS: Mention new command line option -mrelax-relocations and
	new configure option --enable-x86-relax-relocations for x86
	target.
	* config.in: Regenerated.
	* configure.ac: Add --enable-x86-relax-relocations.
	(ac_default_x86_relax_relocations): New.  Default to 1 except
	for x86 Solaris targets older than Solaris 12.
	(DEFAULT_GENERATE_X86_RELAX_RELOCATIONS): Define.
	* configure: Likewise.
	* config/tc-i386.c (generate_relax_relocations): New.
	(OPTION_MRELAX_RELOCATIONS): Likewise.
	(output_disp): Don't generate relax relocations if
	generate_relax_relocations is 0.
	(md_longopts): Add -mrelax-relocations.
	(md_show_usage): Likewise.
	(md_parse_option): Handle OPTION_MRELAX_RELOCATIONS.
	* doc/c-i386.texi: Document -mrelax-relocations=.
	* testsuite/gas/i386/got-no-relax.d: New file.
	* testsuite/gas/i386/x86-64-gotpcrel-no-relax.d: Likewise.
	* testsuite/gas/i386/got.d: Pass -mrelax-relocations=yes to as.
	* testsuite/gas/i386/localpic.d: Likewise.
	* testsuite/gas/i386/mixed-mode-reloc32.d: Likewise.
	* testsuite/gas/i386/reloc32.d: Likewise.
	* testsuite/gas/i386/x86-64-gotpcrel.d: Likewise.
	* testsuite/gas/i386/x86-64-localpic.d: Likewise.
	* testsuite/gas/i386/ilp32/x86-64-gotpcrel.d: Likewise.
	* testsuite/gas/i386/ilp32/x86-64-localpic.d: Likewise.
	* testsuite/gas/i386/i386.exp: Run got-no-relax and
	x86-64-gotpcrel-no-relax.

ld/

	PR gas/19520
	* testsuite/ld-i386/branch1.d: Pass -mrelax-relocations=yes to as.
	* testsuite/ld-i386/call1.d: Likewise.
	* testsuite/ld-i386/call2.d: Likewise.
	* testsuite/ld-i386/call3a.d: Likewise.
	* testsuite/ld-i386/call3b.d: Likewise.
	* testsuite/ld-i386/call3c.d: Likewise.
	* testsuite/ld-i386/call3d.d: Likewise.
	* testsuite/ld-i386/call3e.d: Likewise.
	* testsuite/ld-i386/call3f.d: Likewise.
	* testsuite/ld-i386/call3g.d: Likewise.
	* testsuite/ld-i386/call3h.d: Likewise.
	* testsuite/ld-i386/jmp1.d: Likewise.
	* testsuite/ld-i386/jmp2.d: Likewise.
	* testsuite/ld-i386/lea1c.d: Likewise.
	* testsuite/ld-i386/load1.d: Likewise.
	* testsuite/ld-i386/load2.d: Likewise.
	* testsuite/ld-i386/load3.d: Likewise.
	* testsuite/ld-i386/load4a.d: Likewise.
	* testsuite/ld-i386/load5a.d: Likewise.
	* testsuite/ld-i386/mov2b.d: Likewise.
	* testsuite/ld-i386/mov3.d: Likewise.
	* testsuite/ld-ifunc/ifunc-21-x86-64.d: Likewise.
	* testsuite/ld-ifunc/ifunc-22-x86-64.d: Likewise.
	* testsuite/ld-ifunc/ifunc-5r-local-x86-64.d: Likewise.
	* testsuite/ld-x86-64/call1a.d: Likewise.
	* testsuite/ld-x86-64/call1b.d: Likewise.
	* testsuite/ld-x86-64/call1c.d: Likewise.
	* testsuite/ld-x86-64/call1d.d: Likewise.
	* testsuite/ld-x86-64/call1e.d: Likewise.
	* testsuite/ld-x86-64/call1f.d: Likewise.
	* testsuite/ld-x86-64/call1h.d: Likewise.
	* testsuite/ld-x86-64/call1i.d: Likewise.
	* testsuite/ld-x86-64/load1a.d: Likewise.
	* testsuite/ld-x86-64/load1b.d: Likewise.
	* testsuite/ld-i386/got1a.S: Load GOT into %ecx and use it.
	* testsuite/ld-i386/got1.dd: Updated.
	* testsuite/ld-i386/got1d.S (1): Removed.
	* testsuite/ld-i386/i386.exp: Add -Wa,-mrelax-relocations=yes.
	* testsuite/ld-x86-64/x86-64.exp: Likewise.

11 files changed, 68 insertions, 0 deletions

diff --git a/gas/testsuite/gas/i386/got-no-relax.d b/gas/testsuite/gas/i386/got-no-relax.d
new file mode 100644
index 0000000..6bf138a
--- /dev/null
+++ b/gas/testsuite/gas/i386/got-no-relax.d
@@ -0,0 +1,31 @@
+#source: got.s
+#as: -mrelax-relocations=no
+#objdump: -dwr
+
+.*: +file format .*
+
+
+Disassembly of section .text:
+
+0+ <_start>:
+[ 	]*[a-f0-9]+:	b8 00 00 00 00       	mov    \$0x0,%eax	1: R_386_GOT32	foo
+[ 	]*[a-f0-9]+:	8b 05 00 00 00 00    	mov    0x0,%eax	7: R_386_GOT32X	foo
+[ 	]*[a-f0-9]+:	8b 80 00 00 00 00    	mov    0x0\(%eax\),%eax	d: R_386_GOT32	foo
+[ 	]*[a-f0-9]+:	05 00 00 00 00       	add    \$0x0,%eax	12: R_386_GOT32	foo
+[ 	]*[a-f0-9]+:	03 05 00 00 00 00    	add    0x0,%eax	18: R_386_GOT32X	foo
+[ 	]*[a-f0-9]+:	03 80 00 00 00 00    	add    0x0\(%eax\),%eax	1e: R_386_GOT32	foo
+[ 	]*[a-f0-9]+:	ff 15 00 00 00 00    	call   \*0x0	24: R_386_GOT32X	foo
+[ 	]*[a-f0-9]+:	ff 90 00 00 00 00    	call   \*0x0\(%eax\)	2a: R_386_GOT32	foo
+[ 	]*[a-f0-9]+:	ff 25 00 00 00 00    	jmp    \*0x0	30: R_386_GOT32X	foo
+[ 	]*[a-f0-9]+:	ff a0 00 00 00 00    	jmp    \*0x0\(%eax\)	36: R_386_GOT32	foo
+[ 	]*[a-f0-9]+:	b8 00 00 00 00       	mov    \$0x0,%eax	3b: R_386_GOT32	foo
+[ 	]*[a-f0-9]+:	8b 05 00 00 00 00    	mov    0x0,%eax	41: R_386_GOT32X	foo
+[ 	]*[a-f0-9]+:	8b 80 00 00 00 00    	mov    0x0\(%eax\),%eax	47: R_386_GOT32	foo
+[ 	]*[a-f0-9]+:	05 00 00 00 00       	add    \$0x0,%eax	4c: R_386_GOT32	foo
+[ 	]*[a-f0-9]+:	03 05 00 00 00 00    	add    0x0,%eax	52: R_386_GOT32X	foo
+[ 	]*[a-f0-9]+:	03 80 00 00 00 00    	add    0x0\(%eax\),%eax	58: R_386_GOT32	foo
+[ 	]*[a-f0-9]+:	ff 90 00 00 00 00    	call   \*0x0\(%eax\)	5e: R_386_GOT32	foo
+[ 	]*[a-f0-9]+:	ff 15 00 00 00 00    	call   \*0x0	64: R_386_GOT32X	foo
+[ 	]*[a-f0-9]+:	ff a0 00 00 00 00    	jmp    \*0x0\(%eax\)	6a: R_386_GOT32	foo
+[ 	]*[a-f0-9]+:	ff 25 00 00 00 00    	jmp    \*0x0	70: R_386_GOT32X	foo
+#pass
diff --git a/gas/testsuite/gas/i386/got.d b/gas/testsuite/gas/i386/got.d
index f76ca47..7621cdf 100644
--- a/gas/testsuite/gas/i386/got.d
+++ b/gas/testsuite/gas/i386/got.d
@@ -1,3 +1,4 @@
+#as: -mrelax-relocations=yes
 #objdump: -dwr
 
 .*: +file format .*
diff --git a/gas/testsuite/gas/i386/i386.exp b/gas/testsuite/gas/i386/i386.exp
index b9144c4..22aca23 100644
--- a/gas/testsuite/gas/i386/i386.exp
+++ b/gas/testsuite/gas/i386/i386.exp
@@ -408,6 +408,7 @@ if [expr ([istarget "i*86-*-*"] ||  [istarget "x86_64-*-*"]) && [gas_32_check]]
 	run_dump_test "relax-4"
 
 	run_dump_test "got"
+	run_dump_test "got-no-relax"
 
 	if {![istarget "*-*-nacl*"]} then {
 	    run_dump_test "iamcu-1"
@@ -788,6 +789,7 @@ if [expr ([istarget "i*86-*-*"] || [istarget "x86_64-*-*"]) && [gas_64_check]] t
 	run_list_test "x86-64-branch-3" "-al -mintel64"
 
 	run_dump_test "x86-64-gotpcrel"
+	run_dump_test "x86-64-gotpcrel-no-relax"
     }
 
     set ASFLAGS "$old_ASFLAGS"
diff --git a/gas/testsuite/gas/i386/ilp32/x86-64-gotpcrel.d b/gas/testsuite/gas/i386/ilp32/x86-64-gotpcrel.d
index e5a3b1c..1314e5b 100644
--- a/gas/testsuite/gas/i386/ilp32/x86-64-gotpcrel.d
+++ b/gas/testsuite/gas/i386/ilp32/x86-64-gotpcrel.d
@@ -1,4 +1,5 @@
 #source: ../x86-64-gotpcrel.s
+#as: --x32 -mrelax-relocations=yes
 #objdump: -dwr
 #name: x86-64 (ILP32) gotpcrel
 
diff --git a/gas/testsuite/gas/i386/ilp32/x86-64-localpic.d b/gas/testsuite/gas/i386/ilp32/x86-64-localpic.d
index 0ca69c7..a9528a2 100644
--- a/gas/testsuite/gas/i386/ilp32/x86-64-localpic.d
+++ b/gas/testsuite/gas/i386/ilp32/x86-64-localpic.d
@@ -1,4 +1,5 @@
 #source: ../x86-64-localpic.s
+#as: --x32 -mrelax-relocations=yes
 #readelf: -rsW
 #name: x86-64 (ILP32) local PIC
 
diff --git a/gas/testsuite/gas/i386/localpic.d b/gas/testsuite/gas/i386/localpic.d
index 04fb5ce..0a5eec5 100644
--- a/gas/testsuite/gas/i386/localpic.d
+++ b/gas/testsuite/gas/i386/localpic.d
@@ -1,3 +1,4 @@
+#as: -mrelax-relocations=yes
 #readelf: -rs
 #name: i386 local PIC
 
diff --git a/gas/testsuite/gas/i386/mixed-mode-reloc32.d b/gas/testsuite/gas/i386/mixed-mode-reloc32.d
index 9affc36..a2ef6a0 100644
--- a/gas/testsuite/gas/i386/mixed-mode-reloc32.d
+++ b/gas/testsuite/gas/i386/mixed-mode-reloc32.d
@@ -1,3 +1,4 @@
+#as: -mrelax-relocations=yes
 #objdump: -r
 #source: mixed-mode-reloc.s
 #name: x86 mixed mode relocs (32-bit object)
diff --git a/gas/testsuite/gas/i386/reloc32.d b/gas/testsuite/gas/i386/reloc32.d
index 45c9cd2..b6e1bbd 100644
--- a/gas/testsuite/gas/i386/reloc32.d
+++ b/gas/testsuite/gas/i386/reloc32.d
@@ -1,3 +1,4 @@
+#as: -mrelax-relocations=yes
 #objdump: -Drw
 #name: i386 relocs
 
diff --git a/gas/testsuite/gas/i386/x86-64-gotpcrel-no-relax.d b/gas/testsuite/gas/i386/x86-64-gotpcrel-no-relax.d
new file mode 100644
index 0000000..a3f8943
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-gotpcrel-no-relax.d
@@ -0,0 +1,27 @@
+#source: x86-64-gotpcrel.s
+#as: -mrelax-relocations=no
+#objdump: -dwr
+
+.*: +file format .*
+
+
+Disassembly of section .text:
+
+0+ <_start>:
+[ 	]*[a-f0-9]+:	48 c7 c0 00 00 00 00 	mov    \$0x0,%rax	3: R_X86_64_GOTPCREL	foo
+[ 	]*[a-f0-9]+:	48 8b 04 25 00 00 00 00 	mov    0x0,%rax	b: R_X86_64_GOTPCREL	foo
+[ 	]*[a-f0-9]+:	48 8b 05 00 00 00 00 	mov    0x0\(%rip\),%rax        # 16 <_start\+0x16>	12: R_X86_64_GOTPCREL	foo-0x4
+[ 	]*[a-f0-9]+:	48 8b 81 00 00 00 00 	mov    0x0\(%rcx\),%rax	19: R_X86_64_GOTPCREL	foo
+[ 	]*[a-f0-9]+:	ff 15 00 00 00 00    	callq  \*0x0\(%rip\)        # 23 <_start\+0x23>	1f: R_X86_64_GOTPCREL	foo-0x4
+[ 	]*[a-f0-9]+:	ff 90 00 00 00 00    	callq  \*0x0\(%rax\)	25: R_X86_64_GOTPCREL	foo
+[ 	]*[a-f0-9]+:	ff 25 00 00 00 00    	jmpq   \*0x0\(%rip\)        # 2f <_start\+0x2f>	2b: R_X86_64_GOTPCREL	foo-0x4
+[ 	]*[a-f0-9]+:	ff a1 00 00 00 00    	jmpq   \*0x0\(%rcx\)	31: R_X86_64_GOTPCREL	foo
+[ 	]*[a-f0-9]+:	48 c7 c0 00 00 00 00 	mov    \$0x0,%rax	38: R_X86_64_GOTPCREL	foo
+[ 	]*[a-f0-9]+:	48 8b 04 25 00 00 00 00 	mov    0x0,%rax	40: R_X86_64_GOTPCREL	foo
+[ 	]*[a-f0-9]+:	48 8b 05 00 00 00 00 	mov    0x0\(%rip\),%rax        # 4b <_start\+0x4b>	47: R_X86_64_GOTPCREL	foo-0x4
+[ 	]*[a-f0-9]+:	48 8b 81 00 00 00 00 	mov    0x0\(%rcx\),%rax	4e: R_X86_64_GOTPCREL	foo
+[ 	]*[a-f0-9]+:	ff 15 00 00 00 00    	callq  \*0x0\(%rip\)        # 58 <_start\+0x58>	54: R_X86_64_GOTPCREL	foo-0x4
+[ 	]*[a-f0-9]+:	ff 90 00 00 00 00    	callq  \*0x0\(%rax\)	5a: R_X86_64_GOTPCREL	foo
+[ 	]*[a-f0-9]+:	ff 25 00 00 00 00    	jmpq   \*0x0\(%rip\)        # 64 <_start\+0x64>	60: R_X86_64_GOTPCREL	foo-0x4
+[ 	]*[a-f0-9]+:	ff a1 00 00 00 00    	jmpq   \*0x0\(%rcx\)	66: R_X86_64_GOTPCREL	foo
+#pass
diff --git a/gas/testsuite/gas/i386/x86-64-gotpcrel.d b/gas/testsuite/gas/i386/x86-64-gotpcrel.d
index 6ca3fc7..fbe5e47 100644
--- a/gas/testsuite/gas/i386/x86-64-gotpcrel.d
+++ b/gas/testsuite/gas/i386/x86-64-gotpcrel.d
@@ -1,3 +1,4 @@
+#as: -mrelax-relocations=yes
 #objdump: -dwr
 
 .*: +file format .*
diff --git a/gas/testsuite/gas/i386/x86-64-localpic.d b/gas/testsuite/gas/i386/x86-64-localpic.d
index 0a07149..bafaa9c 100644
--- a/gas/testsuite/gas/i386/x86-64-localpic.d
+++ b/gas/testsuite/gas/i386/x86-64-localpic.d
@@ -1,3 +1,4 @@
+#as: -mrelax-relocations=yes
 #readelf: -rsW
 #name: x86-64 local PIC