ELF: Add testcases for PR ld/23658

Add testcases to verify that all SHT_NOTE sections with the same section
alignment are placed in a single PT_NOTE segment.

	PR ld/23658
	* testsuite/ld-elf/pr23658-1.d: New file.
	* testsuite/ld-elf/pr23658-1a.s: Likewise.
	* testsuite/ld-elf/pr23658-1b.s: Likewise.
	* testsuite/ld-elf/pr23658-1c.s: Likewise.
	* testsuite/ld-elf/pr23658-1d.s: Likewise.
	* testsuite/ld-elf/pr23658-2.rd: Likewise.
	* testsuite/ld-elf/pr23658-3.d: Likewise.
	* testsuite/ld-elf/pr23658-3.s: Likewise.
	* testsuite/ld-elf/pr23658-3.t: Likewise.
	* testsuite/ld-elf/shared.exp: Run PR ld/23658 tests.

ld/ChangeLog

@@ -1,3 +1,17 @@
+2018-10-03  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR ld/23658
+	* testsuite/ld-elf/pr23658-1.d: New file.
+	* testsuite/ld-elf/pr23658-1a.s: Likewise.
+	* testsuite/ld-elf/pr23658-1b.s: Likewise.
+	* testsuite/ld-elf/pr23658-1c.s: Likewise.
+	* testsuite/ld-elf/pr23658-1d.s: Likewise.
+	* testsuite/ld-elf/pr23658-2.rd: Likewise.
+	* testsuite/ld-elf/pr23658-3.d: Likewise.
+	* testsuite/ld-elf/pr23658-3.s: Likewise.
+	* testsuite/ld-elf/pr23658-3.t: Likewise.
+	* testsuite/ld-elf/shared.exp: Run PR ld/23658 tests.
+
 2018-10-03  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR ld/23658

ld/testsuite/ld-elf/pr23658-1.d

@@ -0,0 +1,16 @@
+#source: pr23658-1a.s
+#source: pr23658-1b.s
+#source: pr23658-1c.s
+#source: pr23658-1d.s
+#source: start.s
+#ld: --build-id
+#readelf: -l --wide
+# Since generic linker targets don't place SHT_NOTE sections as orphan,
+# SHT_NOTE sections aren't grouped nor sorted.
+#xfail: cr16-* crx-* d30v-* dlx-* fr30-* frv-* iq2000-*
+#xfail: m68hc12-* mn10200-* moxie-* mt-* msp430-* pj-*
+
+#...
+ +[0-9]+ +\.note\.4 \.note\.1 +
+ +[0-9]+ +\.note.gnu.build-id \.note\.2 .note\.3 +
+#pass

ld/testsuite/ld-elf/pr23658-1a.s

@@ -0,0 +1,21 @@
+	.text
+	.global foo
+foo:
+	.dc.a 0
+
+	.section ".note.4", "a"
+	.p2align 3
+	.long .L1 - .L0		/* name length.  */
+	.long .L3 - .L1		/* data length.  */
+	.long  123456		/* note type.  */
+.L0:
+	.asciz "GNU"		/* vendor name.  */
+.L1:
+	.p2align 3
+	.long 0			/* pr_type.  */
+	.long .L5 - .L4		/* pr_datasz.  */
+.L4:
+	.zero 0x10
+.L5:
+	.p2align 3
+.L3:

ld/testsuite/ld-elf/pr23658-1b.s

@@ -0,0 +1,16 @@
+	.section ".note.2", "a"
+	.p2align 2
+	.long .L1 - .L0		/* name length.  */
+	.long .L3 - .L1		/* data length.  */
+	.long  12345		/* note type.  */
+.L0:
+	.asciz "GNU"		/* vendor name.  */
+.L1:
+	.p2align 2
+	.long 0			/* pr_type.  */
+	.long .L5 - .L4		/* pr_datasz.  */
+.L4:
+	.zero 0x10
+.L5:
+	.p2align 2
+.L3:

ld/testsuite/ld-elf/pr23658-1c.s

@@ -0,0 +1,16 @@
+	.section ".note.1", "a"
+	.p2align 3
+	.long .L1 - .L0		/* name length.  */
+	.long .L3 - .L1		/* data length.  */
+	.long  12345		/* note type.  */
+.L0:
+	.asciz "GNU"		/* vendor name.  */
+.L1:
+	.p2align 3
+	.long 0			/* pr_type.  */
+	.long .L5 - .L4		/* pr_datasz.  */
+.L4:
+	.zero 0x10
+.L5:
+	.p2align 3
+.L3:

ld/testsuite/ld-elf/pr23658-1d.s

@@ -0,0 +1,16 @@
+	.section ".note.3", "a"
+	.p2align 2
+	.long .L1 - .L0		/* name length.  */
+	.long .L3 - .L1		/* data length.  */
+	.long  12345		/* note type.  */
+.L0:
+	.asciz "GNU"		/* vendor name.  */
+.L1:
+	.p2align 2
+	.long 0			/* pr_type.  */
+	.long .L5 - .L4		/* pr_datasz.  */
+.L4:
+	.zero 0x10
+.L5:
+	.p2align 2
+.L3:

ld/testsuite/ld-elf/pr23658-2.rd

@@ -0,0 +1,6 @@
+#...
+ +[0-9]+ +\.interp \.note.4 \.note.1 \.note.2 \.note.3.*
+#...
+ +[0-9]+ +\.note\.4 \.note\.1 +
+ +[0-9]+ +\.note\.2 .note\.3 +
+#pass

ld/testsuite/ld-elf/pr23658-3.d

@@ -0,0 +1,8 @@
+#as: -mx86-used-note=yes
+#ld: -T pr23658-3.t -z noseparate-code
+#nm: -B
+#target: i?86-*-* x86_64-*-*
+
+#...
+0+4000 D __FOO
+#...

ld/testsuite/ld-elf/pr23658-3.s

@@ -0,0 +1,4 @@
+        .data
+        .global baz
+baz:
+        .word 0

ld/testsuite/ld-elf/pr23658-3.t

@@ -0,0 +1,14 @@
+SECTIONS
+{
+  .data 0x1000 :
+  {
+    *(.data)
+    QUAD (__FOO);
+  }
+
+  .foo 0x4000 :
+  {
+    PROVIDE (__FOO = .);
+    *(.foo)
+  }
+}

ld/testsuite/ld-elf/shared.exp

@@ -49,6 +49,12 @@ if [istarget "sparc*-*-*"] {
     append AFLAGS_PIC " -K PIC"
 }
 
+# GAS options to disable program property note.
+set AFLAGS_NOTE ""
+if { [istarget "i?86-*-*"] || [istarget "x86_64-*-*"] } {
+    append AFLAGS_NOTE "-mx86-used-note=no"
+}
+
 # This target requires a non-default emulation for successful shared
 # library/executable builds.
 set LFLAGS ""
@@ -1474,3 +1480,18 @@ if { [istarget "i?86-*-*"]
 	] \
     ]
 }
+
+run_ld_link_tests [list \
+    [list "Build pr23658.so" \
+	"-shared" "" "$AFLAGS_PIC" \
+	{pr23658-1a.s} {} "pr23658.so"] \
+    [list \
+	"Build pr23658-2" \
+	"--dynamic-linker tmpdir/pr23658.so --no-as-needed tmpdir/pr23658.so" \
+	"" \
+	$AFLAGS_NOTE \
+	{ pr23658-1a.s pr23658-1b.s pr23658-1c.s pr23658-1d.s start.s } \
+	{{readelf {-lW} pr23658-2.rd}} \
+	"pr23658-2" \
+    ] \
+]