x86: Don't generate GOT_symbol for PLT relocations

Don't generate the _GLOBAL_OFFSET_TABLE_ symbol for PLT relocations
since it isn't needed.

	PR gas/27178
	* config/tc-i386.c (lex_got::gotrel): Add need_GOT_symbol.
	Don't generate GOT_symbol for PLT relocations.
	* testsuite/gas/i386/i386.exp: Run PR gas/27178 tests.
	* testsuite/gas/i386/no-got.d: New file.
	* testsuite/gas/i386/no-got.s: Likewise.
	* testsuite/gas/i386/x86-64-no-got.d: Likewise.
	* testsuite/gas/i386/x86-64-no-got.s: Likewise.

5 files changed, 48 insertions, 0 deletions

diff --git a/gas/testsuite/gas/i386/i386.exp b/gas/testsuite/gas/i386/i386.exp
index 3b8a734..c9bca8a 100644
--- a/gas/testsuite/gas/i386/i386.exp
+++ b/gas/testsuite/gas/i386/i386.exp
@@ -645,6 +645,8 @@ if [gas_32_check] then {
 	run_dump_test "got"
 	run_dump_test "got-no-relax"
 
+	run_dump_test "no-got"
+
 	run_dump_test "addend"
 	run_dump_test "nop-3"
 	run_dump_test "nop-4"
@@ -1262,6 +1264,8 @@ if [gas_64_check] then {
 	run_dump_test "x86-64-gotpcrel-no-relax"
 	run_dump_test "x86-64-gotpcrel-2"
 
+	run_dump_test "x86-64-no-got"
+
 	run_dump_test "x86-64-addend"
 	run_dump_test "x86-64-nop-3"
 	run_dump_test "x86-64-nop-4"
diff --git a/gas/testsuite/gas/i386/no-got.d b/gas/testsuite/gas/i386/no-got.d
new file mode 100644
index 0000000..3dac832
--- /dev/null
+++ b/gas/testsuite/gas/i386/no-got.d
@@ -0,0 +1,17 @@
+#objdump: -drwt
+#name: i386 no-GOT
+
+.*: +file format .*
+
+SYMBOL TABLE:
+0+ g     F .text	00000000 foo
+0+         \*UND\*	00000000 bar
+
+
+
+Disassembly of section .text:
+
+0+ <foo>:
+ +[a-f0-9]+:	e9 fc ff ff ff       	jmp    1 <foo\+0x1>	1: R_386_PLT32	bar
+ +[a-f0-9]+:	e8 fc ff ff ff       	call   6 <foo\+0x6>	6: R_386_PLT32	bar
+#pass
diff --git a/gas/testsuite/gas/i386/no-got.s b/gas/testsuite/gas/i386/no-got.s
new file mode 100644
index 0000000..9ffad27
--- /dev/null
+++ b/gas/testsuite/gas/i386/no-got.s
@@ -0,0 +1,5 @@
+	.global foo
+	.type foo, @function
+foo:
+	jmp bar@PLT
+	call bar@PLT
diff --git a/gas/testsuite/gas/i386/x86-64-no-got.d b/gas/testsuite/gas/i386/x86-64-no-got.d
new file mode 100644
index 0000000..f09f3b1
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-no-got.d
@@ -0,0 +1,17 @@
+#objdump: -drwt
+#name: x86-64 no-GOT
+
+.*: +file format .*
+
+SYMBOL TABLE:
+0+ g     F .text	0000000000000000 foo
+0+         \*UND\*	0000000000000000 bar
+
+
+
+Disassembly of section .text:
+
+0+ <foo>:
+ +[a-f0-9]+:	e9 00 00 00 00       	jmp    5 <foo\+0x5>	1: R_X86_64_PLT32	bar-0x4
+ +[a-f0-9]+:	e8 00 00 00 00       	call   a <foo\+0xa>	6: R_X86_64_PLT32	bar-0x4
+#pass
diff --git a/gas/testsuite/gas/i386/x86-64-no-got.s b/gas/testsuite/gas/i386/x86-64-no-got.s
new file mode 100644
index 0000000..9ffad27
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-no-got.s
@@ -0,0 +1,5 @@
+	.global foo
+	.type foo, @function
+foo:
+	jmp bar@PLT
+	call bar@PLT