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.