2015-10-29 Catherine Moore <clm@codesourcery.com>

    	bfd/
    	* elfxx-mips.c (mips_elf_check_mips16_stubs): Set a stub's output
    	section to bfd_abs_section_ptr if the stub is discarded.

    	ld/testsuite/
    	* ld-mips-elf/mips16-fp-stub-1.s: New.
    	* ld-mips-elf/mips16-fp-stub-2.s: New.
    	* ld-mips-elf/mips16-fp-stub.d: New.
    	* ld-mips-elf/mips-elf.exp: Run new tests.
    	* ld-mips-elf/mips16-intermix.d: Update expected output.

	https://sourceware.org/ml/binutils/2015-10/msg00137.html

6 files changed, 124 insertions, 3 deletions

diff --git a/ld/testsuite/ChangeLog b/ld/testsuite/ChangeLog
index f0124f9..d775f11 100644
--- a/ld/testsuite/ChangeLog
+++ b/ld/testsuite/ChangeLog
@@ -1,3 +1,11 @@
+2015-10-29  Catherine Moore  <clm@codesourcery.com>
+    
+    	* ld-mips-elf/mips16-fp-stub-1.s: New.
+    	* ld-mips-elf/mips16-fp-stub-2.s: New.
+    	* ld-mips-elf/mips16-fp-stub.d: New.
+    	* ld-mips-elf/mips-elf.exp: Run new tests.
+    	* ld-mips-elf/mips16-intermix.d: Update expected output.
+
 2015-10-28  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR ld/19162
diff --git a/ld/testsuite/ld-mips-elf/mips-elf.exp b/ld/testsuite/ld-mips-elf/mips-elf.exp
index dd8b228..3b02bc0 100644
--- a/ld/testsuite/ld-mips-elf/mips-elf.exp
+++ b/ld/testsuite/ld-mips-elf/mips-elf.exp
@@ -666,6 +666,16 @@ run_ld_link_tests $mips16_intermix_test
 
 run_dump_test "mips16-local-stubs-1"
 
+set mips16_fp_stub_test [list \
+    [list "Floating-point stub for mips16 functions" \
+	 "$abi_ldflags(o32)" "" \
+	 "$abi_asflags(o32) -mips32r2" \
+	 {mips16-fp-stub-1.s mips16-fp-stub-2.s} \
+	 {{readelf --debug-dump=frames mips16-fp-stub.d}} \
+	 "mips16-fp-stub"]]
+
+run_ld_link_tests $mips16_fp_stub_test
+
 set o32flagslist [list [list as $abi_asflags(o32)] [list ld $abi_ldflags(o32)]]
 
 foreach firstfpabi [list 0 1 2 3 4 5 6 7 ] {
diff --git a/ld/testsuite/ld-mips-elf/mips16-fp-stub-1.s b/ld/testsuite/ld-mips-elf/mips16-fp-stub-1.s
new file mode 100644
index 0000000..98a5067
--- /dev/null
+++ b/ld/testsuite/ld-mips-elf/mips16-fp-stub-1.s
@@ -0,0 +1,58 @@
+	.file	1 "mips-fp-stub-1.c"
+	.section .mdebug.abi32
+	.previous
+	.nan	legacy
+	.module	fp=32
+	.module	oddspreg
+	# Stub function to call float foo (float, float)
+	.section	.mips16.call.fp.foo,"ax",@progbits
+	.align	2
+	.set	nomips16
+	.set	nomicromips
+	.ent	__call_stub_fp_foo
+	.type	__call_stub_fp_foo, @function
+__call_stub_fp_foo:
+	.cfi_startproc
+	.cfi_def_cfa 29,-4
+	.cfi_escape 0x16,29,1,0x6d
+	move	$18,$31
+	mtc1	$4,$f12
+	mtc1	$5,$f14
+	jal	foo
+	.cfi_register 31,18
+	mfc1	$2,$f0
+	jr	$18
+	.cfi_endproc
+	.size	__call_stub_fp_foo, .-__call_stub_fp_foo
+	.end	__call_stub_fp_foo
+	.text
+	.align	2
+	.globl	main
+	.set	mips16
+	.set	nomicromips
+	.ent	main
+	.type	main, @function
+main:
+	.frame	$17,24,$31		# vars= 8, regs= 3/0, args= 16, gp= 0
+	.mask	0x80060000,-4
+	.fmask	0x00000000,0
+	save	40,$17,$18,$31
+	addiu	$17,$sp,16
+	lw	$3,.L3
+	lw	$2,.L4
+	move	$5,$3
+	move	$4,$2
+	jal	foo
+	sw	$2,0($17)
+	li	$2,0
+	move	$sp,$17
+	restore	24,$17,$18,$31
+	j	$31
+	.align	2
+.L3:
+	.word	1085485875
+.L4:
+	.word	1065353216
+	.end	main
+	.size	main, .-main
+	.ident	"GCC: (Sourcery CodeBench Lite 2015.11-12 - Preview) 5.2.0"
diff --git a/ld/testsuite/ld-mips-elf/mips16-fp-stub-2.s b/ld/testsuite/ld-mips-elf/mips16-fp-stub-2.s
new file mode 100644
index 0000000..d63cc7c
--- /dev/null
+++ b/ld/testsuite/ld-mips-elf/mips16-fp-stub-2.s
@@ -0,0 +1,43 @@
+	.file	1 "mips-fp-stub-2.c"
+	.section .mdebug.abi32
+	.previous
+	.nan	legacy
+	.module	fp=32
+	.module	oddspreg
+	.text
+	.align	2
+	.globl	foo
+	# Stub function for foo (float, float)
+	.section	.mips16.fn.foo,"ax",@progbits
+	.align	2
+	.set	nomips16
+	.set	nomicromips
+	.ent	__fn_stub_foo
+	.type	__fn_stub_foo, @function
+__fn_stub_foo:
+	la	$25,foo
+	mfc1	$4,$f12
+	mfc1	$5,$f14
+	jr	$25
+	.end	__fn_stub_foo
+	__fn_local_foo = foo
+	.text
+	.set	mips16
+	.set	nomicromips
+	.ent	foo
+	.type	foo, @function
+foo:
+	.frame	$17,8,$31		# vars= 0, regs= 2/0, args= 0, gp= 0
+	.mask	0x80020000,-4
+	.fmask	0x00000000,0
+	save	8,$17,$31
+	move	$17,$sp
+	sw	$4,8($17)
+	sw	$5,12($17)
+	lw	$2,8($17)
+	move	$sp,$17
+	restore	8,$17,$31
+	j	$31
+	.end	foo
+	.size	foo, .-foo
+	.ident	"GCC: (Sourcery CodeBench Lite 2015.11-12 - Preview) 5.2.0"
diff --git a/ld/testsuite/ld-mips-elf/mips16-fp-stub.d b/ld/testsuite/ld-mips-elf/mips16-fp-stub.d
new file mode 100644
index 0000000..1d4aa28
--- /dev/null
+++ b/ld/testsuite/ld-mips-elf/mips16-fp-stub.d
@@ -0,0 +1,2 @@
+
+Section '\.eh_frame' has no debugging data\.
diff --git a/ld/testsuite/ld-mips-elf/mips16-intermix.d b/ld/testsuite/ld-mips-elf/mips16-intermix.d
index 10c7270..9318e3b 100644
--- a/ld/testsuite/ld-mips-elf/mips16-intermix.d
+++ b/ld/testsuite/ld-mips-elf/mips16-intermix.d
@@ -60,9 +60,6 @@ SYMBOL TABLE:
 .* l     F .text	0+[0-9a-f]+ 0xf0 m16_static32_d_l
 .* l     F .text	0+[0-9a-f]+ m32_static16_d_l
 .* l     F .text	0+[0-9a-f]+ 0xf0 m16_static16_d_l
-# ??? We aren't yet able to get rid of the symbol table entry for
-# __fn_stub_m16_d_d, or its .pdr entry.
-.* l     F .text	0+[0-9a-f]+ *
 .* l     F .text	0+[0-9a-f]+ m32_static_d_d
 .* l     F .text	0+[0-9a-f]+ 0xf0 m16_static_d_d
 .* l     F .text	0+[0-9a-f]+ m32_static1_d_d
@@ -94,6 +91,9 @@ SYMBOL TABLE:
 .* l     F .text	0+[0-9a-f]+ __call_stub_fp_m16_static16_d_l
 .* l     F .text	0+[0-9a-f]+ __call_stub_fp_m32_static16_d_d
 .* l     F .text	0+[0-9a-f]+ __call_stub_fp_m16_static16_d_d
+# ??? We aren't yet able to get rid of the symbol table entry for
+# __fn_stub_m16_d_d, or its .pdr entry.
+.* l    df \*ABS\*	0+[0-9a-f]+ *
 #...
 .* g     F .text	0+[0-9a-f]+ m32_ld
 #...