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binutils-gdb/ld/testsuite/ld-x86-64/pr20830.d

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i386/x86-64: Add unwind info for .plt.got section When there are both PLT and GOT references to the same function symbol, linker combines GOTPLT and GOT slots into a single GOT slot and create an entry in .plt.got section for PLT access via the GOT slot. This patch adds unwind info for .plt.got section. bfd/ PR ld/20830 * elf32-i386.c (elf_i386_eh_frame_plt_got): New. (PLT_GOT_FDE_LENGTH): Likewise. (elf_i386_plt_layout): Add eh_frame_plt_got and eh_frame_plt_got_size. (elf_i386_plt): Updated. (elf_i386_link_hash_table): Add plt_got_eh_frame. (elf_i386_check_relocs): Create .eh_frame section for .plt.got. (elf_i386_size_dynamic_sections): Allocate and initialize .eh_frame section for .plt.got. (elf_i386_finish_dynamic_sections): Adjust .eh_frame section for .plt.got. (elf_i386_nacl_plt): Add FIXME for eh_frame_plt_got and eh_frame_plt_got_size. * elf64-x86-64.c (elf_x86_64_eh_frame_plt_got): New. (PLT_GOT_FDE_LENGTH): Likewise. (elf_x86_64_backend_data): Add eh_frame_plt_got and eh_frame_plt_got_size. (elf_x86_64_arch_bed): Updated. (elf_x86_64_bnd_arch_bed): Add FIXME for eh_frame_plt_got and eh_frame_plt_got_size. (elf_x86_64_nacl_arch_bed): Likewise. (elf_x86_64_link_hash_table): Add plt_got_eh_frame. (elf_x86_64_check_relocs): Create .eh_frame section for .plt.got. (elf_x86_64_size_dynamic_sections): Allocate and initialize .eh_frame section for .plt.got. (elf_x86_64_finish_dynamic_sections): Adjust .eh_frame section for .plt.got. ld/ PR ld/20830 * testsuite/ld-i386/i386.exp: Run pr20830. * testsuite/ld-x86-64/x86-64.exp: Likewise. * testsuite/ld-i386/pr20830.d: New file. * testsuite/ld-i386/pr20830.s: Likewise. * testsuite/ld-x86-64/pr20830.d: Likewise. * testsuite/ld-x86-64/pr20830.s: Likewise.
2017-01-10 22:31:59 +01:00
#name: PR ld/20830 (.plt.got)
#as: --64
#ld: -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_lit11; 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]+: ff 25 e4 0d 20 00 jmpq \*0x200de4\(%rip\) # 201010 <_GLOBAL_OFFSET_TABLE_\+0x10>
+[a-f0-9]+: 0f 1f 40 00 nopl 0x0\(%rax\)
Disassembly of section .plt.got:
0+230 <.plt.got>:
+[a-f0-9]+: ff 25 c2 0d 20 00 jmpq \*0x200dc2\(%rip\) # 200ff8 <func>
+[a-f0-9]+: 66 90 xchg %ax,%ax
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