binutils-gdb/ld/testsuite/ld-x86-64/pr21038a.d
H.J. Lu 9e65917652 x86-64: Correct unwind info for the BND PLT
Since the BND PLT has

 230:	68 00 00 00 00       	pushq  $0x0
 235:	f2 e9 e5 ff ff ff    	bnd jmpq 220 <.plt>
 23b:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)

instead of

 230:	ff 25 e2 0d 20 00    	jmpq   *0x200de2(%rip)        # 201018
<func>
 236:	68 00 00 00 00       	pushq  $0x0
 23b:	e9 e0 ff ff ff       	jmpq   220 <.plt>

its unwind info should be

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)

bfd/

	PR ld/21038
	* elf64-x86-64.c (elf_x86_64_eh_frame_bnd_plt): New.
	(elf_x86_64_bnd_arch_bed): Use elf_x86_64_eh_frame_bnd_plt and
	elf_x86_64_eh_frame_plt_got.
	(elf_x86_64_size_dynamic_sections): Get unwind info from
	elf_x86_64_bnd_arch_bed for the BND PLT.

ld/

	PR ld/21038
	* testsuite/ld-x86-64/pr21038a.d: New file.
	* testsuite/ld-x86-64/pr21038a.s: Likewise.
	* testsuite/ld-x86-64/pr21038b.d: Likewise.
	* testsuite/ld-x86-64/pr21038b.s: Likewise.
	* testsuite/ld-x86-64/x86-64.exp: Run pr21038a and pr21038b.
2017-01-11 09:17:05 -08:00

72 lines
1.9 KiB
Makefile

#name: PR ld/21038 (.plt.got)
#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=0000000000000238..0000000000000244
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=0000000000000220..0000000000000230
DW_CFA_def_cfa_offset: 16
DW_CFA_advance_loc: 6 to 0000000000000226
DW_CFA_def_cfa_offset: 24
DW_CFA_advance_loc: 10 to 0000000000000230
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=0000000000000230..0000000000000238
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+220 <.plt>:
+[a-f0-9]+: ff 35 e2 0d 20 00 pushq 0x200de2\(%rip\) # 201008 <_GLOBAL_OFFSET_TABLE_\+0x8>
+[a-f0-9]+: f2 ff 25 e3 0d 20 00 bnd jmpq \*0x200de3\(%rip\) # 201010 <_GLOBAL_OFFSET_TABLE_\+0x10>
+[a-f0-9]+: 0f 1f 00 nopl \(%rax\)
Disassembly of section .plt.got:
0+230 <.plt.got>:
+[a-f0-9]+: f2 ff 25 c1 0d 20 00 bnd jmpq \*0x200dc1\(%rip\) # 200ff8 <func>
+[a-f0-9]+: 90 nop
Disassembly of section .text:
0+238 <foo>:
+[a-f0-9]+: e8 f3 ff ff ff callq 230 <.plt.got>
+[a-f0-9]+: 48 8b 05 b4 0d 20 00 mov 0x200db4\(%rip\),%rax # 200ff8 <func>
#pass