From d830549dba59f4e11412fd6dc18b7b1d4c6cf557 Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Fri, 2 Feb 2018 16:55:21 +1030 Subject: [PATCH] PowerPC64, don't relocate nops This fixes a "bug" in that nops emitted as part of code optimization were being relocated. As it happens the relocation value was always zero so the nop wasn't changed. Whew! I've also moved the use of "howto" later since I was caught out in some recent code changes with the howto not matching r_type. * elf64-ppc.c (ppc64_elf_relocate_section): Don't relocate nops emitted for toc sequence optimization. Set and use "howto" later. --- bfd/ChangeLog | 5 +++++ bfd/elf64-ppc.c | 13 +++++++++---- 2 files changed, 14 insertions(+), 4 deletions(-) diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 664a974..090fc23 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,8 @@ +2018-02-02 Alan Modra + + * elf64-ppc.c (ppc64_elf_relocate_section): Don't relocate nops + emitted for toc sequence optimization. Set and use "howto" later. + 2018-02-01 Simon Marchi * elf64-ppc.c (ppc64_elf_archive_symbol_lookup): Avoid pointer diff --git a/bfd/elf64-ppc.c b/bfd/elf64-ppc.c index 9e4a4b5..d6ec12f 100644 --- a/bfd/elf64-ppc.c +++ b/bfd/elf64-ppc.c @@ -15067,7 +15067,6 @@ ppc64_elf_relocate_section (bfd *output_bfd, /* Multi-instruction sequences that access the TOC can be optimized, eg. addis ra,r2,0; addi rb,ra,x; to nop; addi rb,r2,x; */ - howto = ppc64_elf_howto_table[(int) r_type]; switch (r_type) { default: @@ -15099,6 +15098,7 @@ ppc64_elf_relocate_section (bfd *output_bfd, { bfd_byte *p = contents + (rel->r_offset & ~3); bfd_put_32 (input_bfd, NOP, p); + goto copy_reloc; } break; @@ -15140,9 +15140,13 @@ ppc64_elf_relocate_section (bfd *output_bfd, /* xgettext:c-format */ info->callbacks->minfo (_("%H: warning: %s unexpected insn %#x.\n"), - input_bfd, input_section, rel->r_offset, howto->name, insn); + input_bfd, input_section, rel->r_offset, + ppc64_elf_howto_table[r_type]->name, insn); else - bfd_put_32 (input_bfd, NOP, p); + { + bfd_put_32 (input_bfd, NOP, p); + goto copy_reloc; + } } break; @@ -15240,7 +15244,7 @@ ppc64_elf_relocate_section (bfd *output_bfd, /* xgettext:c-format */ (_("%H: error: %s not a multiple of %u\n"), input_bfd, input_section, rel->r_offset, - howto->name, + ppc64_elf_howto_table[r_type]->name, mask + 1); bfd_set_error (bfd_error_bad_value); ret = FALSE; @@ -15252,6 +15256,7 @@ ppc64_elf_relocate_section (bfd *output_bfd, /* Dynamic relocs are not propagated for SEC_DEBUGGING sections because such sections are not SEC_ALLOC and thus ld.so will not process them. */ + howto = ppc64_elf_howto_table[(int) r_type]; if (unresolved_reloc && !((input_section->flags & SEC_DEBUGGING) != 0 && h->elf.def_dynamic) -- 2.7.4