x86-64: Also generate unwind info for .plt.bnd

Also generate unwind info for the .plt.bnd section.  Sine it is the same
as unwind info for the .plt.got section, we use unwind info for the
.plt.got section to cover the the .plt.bnd section.

bfd/

	PR ld/21038
	* elf64-x86-64.c (elf_x86_64_link_hash_table): Add
	plt_bnd_eh_frame.
	(elf_x86_64_check_relocs): Create .eh_frame section for the
	.plt.bnd section.
	(elf_x86_64_size_dynamic_sections): Allocate and initialize
	.eh_frame section for the .plt.bnd section.
	(elf_x86_64_finish_dynamic_sections): Adjust .eh_frame section
	for the .plt.bnd section.

ld/

	PR ld/21038
	* testsuite/ld-x86-64/pr21038b.d: Updated.
	* testsuite/ld-x86-64/pr21038c.d: New file.
	* testsuite/ld-x86-64/pr21038c.s: Likewise.
	* testsuite/ld-x86-64/x86-64.exp: Run pr21038c.

4 files changed, 109 insertions, 0 deletions

diff --git a/ld/testsuite/ld-x86-64/pr21038b.d b/ld/testsuite/ld-x86-64/pr21038b.d
index 1690d1e..053d908 100644
--- a/ld/testsuite/ld-x86-64/pr21038b.d
+++ b/ld/testsuite/ld-x86-64/pr21038b.d
@@ -40,6 +40,15 @@ Contents of the .eh_frame section:
   DW_CFA_nop
   DW_CFA_nop
 
+0+58 0000000000000014 0000005c FDE cie=00000000 pc=0000000000000240..0000000000000248
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+
 
 Disassembly of section .plt:
 
diff --git a/ld/testsuite/ld-x86-64/pr21038c.d b/ld/testsuite/ld-x86-64/pr21038c.d
new file mode 100644
index 0000000..33ff4ed
--- /dev/null
+++ b/ld/testsuite/ld-x86-64/pr21038c.d
@@ -0,0 +1,90 @@
+#name: PR ld/21038 (.plt.got and .plt.bnd)
+#as: --64
+#ld: -z bndplt -melf_x86_64 -shared -z relro --ld-generated-unwind-info
+#objdump: -dw -Wf
+
+.*: +file format .*
+
+Contents of the .eh_frame section:
+
+0+ 0000000000000014 00000000 CIE
+  Version:               1
+  Augmentation:          "zR"
+  Code alignment factor: 1
+  Data alignment factor: -8
+  Return address column: 16
+  Augmentation data:     1b
+
+  DW_CFA_def_cfa: r7 \(rsp\) ofs 8
+  DW_CFA_offset: r16 \(rip\) at cfa-8
+  DW_CFA_nop
+  DW_CFA_nop
+
+0+18 0000000000000014 0000001c FDE cie=00000000 pc=0000000000000290..00000000000002a1
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+
+0+30 0000000000000024 00000034 FDE cie=00000000 pc=0000000000000260..0000000000000280
+  DW_CFA_def_cfa_offset: 16
+  DW_CFA_advance_loc: 6 to 0000000000000266
+  DW_CFA_def_cfa_offset: 24
+  DW_CFA_advance_loc: 10 to 0000000000000270
+  DW_CFA_def_cfa_expression \(DW_OP_breg7 \(rsp\): 8; DW_OP_breg16 \(rip\): 0; DW_OP_lit15; DW_OP_and; DW_OP_lit5; DW_OP_ge; DW_OP_lit3; DW_OP_shl; DW_OP_plus\)
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+
+0+58 0000000000000014 0000005c FDE cie=00000000 pc=0000000000000288..0000000000000290
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+
+0+70 0000000000000014 00000074 FDE cie=00000000 pc=0000000000000280..0000000000000288
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+
+
+Disassembly of section .plt:
+
+0+260 <.plt>:
+ +[a-f0-9]+:	ff 35 a2 0d 20 00    	pushq  0x200da2\(%rip\)        # 201008 <_GLOBAL_OFFSET_TABLE_\+0x8>
+ +[a-f0-9]+:	f2 ff 25 a3 0d 20 00 	bnd jmpq \*0x200da3\(%rip\)        # 201010 <_GLOBAL_OFFSET_TABLE_\+0x10>
+ +[a-f0-9]+:	0f 1f 00             	nopl   \(%rax\)
+ +[a-f0-9]+:	68 00 00 00 00       	pushq  \$0x0
+ +[a-f0-9]+:	f2 e9 e5 ff ff ff    	bnd jmpq 260 <.plt>
+ +[a-f0-9]+:	0f 1f 44 00 00       	nopl   0x0\(%rax,%rax,1\)
+
+Disassembly of section .plt.got:
+
+0+280 <.plt.got>:
+ +[a-f0-9]+:	f2 ff 25 71 0d 20 00 	bnd jmpq \*0x200d71\(%rip\)        # 200ff8 <func1>
+ +[a-f0-9]+:	90                   	nop
+
+Disassembly of section .plt.bnd:
+
+0+288 <func2@plt>:
+ +[a-f0-9]+:	f2 ff 25 89 0d 20 00 	bnd jmpq \*0x200d89\(%rip\)        # 201018 <func2>
+ +[a-f0-9]+:	90                   	nop
+
+Disassembly of section .text:
+
+0+290 <foo>:
+ +[a-f0-9]+:	e8 eb ff ff ff       	callq  280 <.plt.got>
+ +[a-f0-9]+:	e8 ee ff ff ff       	callq  288 <func2@plt>
+ +[a-f0-9]+:	48 8b 05 57 0d 20 00 	mov    0x200d57\(%rip\),%rax        # 200ff8 <func1>
+#pass
diff --git a/ld/testsuite/ld-x86-64/pr21038c.s b/ld/testsuite/ld-x86-64/pr21038c.s
new file mode 100644
index 0000000..38fc10d
--- /dev/null
+++ b/ld/testsuite/ld-x86-64/pr21038c.s
@@ -0,0 +1,9 @@
+	.text
+	.globl foo
+	.type foo, @function
+foo:
+	.cfi_startproc
+	call	func1@plt
+	call	func2@plt
+	movq	func1@GOTPCREL(%rip), %rax
+	.cfi_endproc
diff --git a/ld/testsuite/ld-x86-64/x86-64.exp b/ld/testsuite/ld-x86-64/x86-64.exp
index ff782a0..8e4e422 100644
--- a/ld/testsuite/ld-x86-64/x86-64.exp
+++ b/ld/testsuite/ld-x86-64/x86-64.exp
@@ -1023,3 +1023,4 @@ run_dump_test "pr20830a"
 run_dump_test "pr20830b"
 run_dump_test "pr21038a"
 run_dump_test "pr21038b"
+run_dump_test "pr21038c"