diff -rup binutils.orig/bfd/elf64-x86-64.c binutils-2.30/bfd/elf64-x86-64.c --- binutils.orig/bfd/elf64-x86-64.c 2018-10-08 15:24:17.980797510 +0100 +++ binutils-2.30/bfd/elf64-x86-64.c 2018-10-08 15:25:02.643458607 +0100 @@ -4399,15 +4399,23 @@ elf_x86_64_finish_dynamic_sections (bfd if (htab->tlsdesc_plt) { + /* The TLSDESC entry in a lazy procedure linkage table. */ + static const bfd_byte tlsdesc_plt_entry[LAZY_PLT_ENTRY_SIZE] = + { + 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */ + 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ + 0xff, 0x25, 16, 0, 0, 0 /* jmpq *GOT+TDG(%rip) */ + }; + bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + htab->tlsdesc_got); memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, - htab->lazy_plt->plt0_entry, - htab->lazy_plt->plt0_entry_size); + tlsdesc_plt_entry, LAZY_PLT_ENTRY_SIZE); - /* Add offset for pushq GOT+8(%rip), since the - instruction uses 6 bytes subtract this value. */ + /* Add offset for pushq GOT+8(%rip), since ENDBR64 uses 4 + bytes and the instruction uses 6 bytes, subtract these + values. */ bfd_put_32 (output_bfd, (htab->elf.sgotplt->output_section->vma + htab->elf.sgotplt->output_offset @@ -4415,14 +4423,13 @@ elf_x86_64_finish_dynamic_sections (bfd - htab->elf.splt->output_section->vma - htab->elf.splt->output_offset - htab->tlsdesc_plt - - 6), + - 4 - 6), (htab->elf.splt->contents + htab->tlsdesc_plt - + htab->lazy_plt->plt0_got1_offset)); - /* Add offset for the PC-relative instruction accessing - GOT+TDG, where TDG stands for htab->tlsdesc_got, - subtracting the offset to the end of that - instruction. */ + + 4 + 2)); + /* Add offset for indirect branch via GOT+TDG, where TDG + stands for htab->tlsdesc_got, subtracting the offset + to the end of that instruction. */ bfd_put_32 (output_bfd, (htab->elf.sgot->output_section->vma + htab->elf.sgot->output_offset @@ -4430,10 +4437,9 @@ elf_x86_64_finish_dynamic_sections (bfd - htab->elf.splt->output_section->vma - htab->elf.splt->output_offset - htab->tlsdesc_plt - - htab->lazy_plt->plt0_got2_insn_end), + - 4 - 6 - 6), (htab->elf.splt->contents - + htab->tlsdesc_plt - + htab->lazy_plt->plt0_got2_offset)); + + htab->tlsdesc_plt + 4 + 6 + 2)); } } Only in binutils-2.30/bfd: elf64-x86-64.c.orig diff -rup binutils.orig/ld/testsuite/ld-x86-64/tlsdesc.pd binutils-2.30/ld/testsuite/ld-x86-64/tlsdesc.pd --- binutils.orig/ld/testsuite/ld-x86-64/tlsdesc.pd 2018-10-08 15:24:17.293802722 +0100 +++ binutils-2.30/ld/testsuite/ld-x86-64/tlsdesc.pd 2018-10-08 15:25:07.515421664 +0100 @@ -13,7 +13,7 @@ Disassembly of section .plt: [0-9a-f]+: ff 35 .. .. 20 00 pushq .*\(%rip\) # 201358 <_GLOBAL_OFFSET_TABLE_\+0x8> [0-9a-f]+: ff 25 .. .. 20 00 jmpq \*.*\(%rip\) # 201360 <_GLOBAL_OFFSET_TABLE_\+0x10> [0-9a-f]+: 0f 1f 40 00 nopl 0x0\(%rax\) + [0-9a-f]+: f3 0f 1e fa endbr64 [0-9a-f]+: ff 35 .. .. 20 00 pushq .*\(%rip\) # 201358 <_GLOBAL_OFFSET_TABLE_\+0x8> [0-9a-f]+: ff 25 .. .. 20 00 jmpq \*.*\(%rip\) # 201348 <.*> - [0-9a-f]+: 0f 1f 40 00 nopl 0x0\(%rax\)