From cc5277b173701364c10204f316db28198f2c683b Mon Sep 17 00:00:00 2001 From: Martin Liska Date: Thu, 4 Jul 2019 16:39:08 +0200 Subject: Support .gnu.lto_.lto section in ELF files (PR 24768). bfd/ChangeLog: 2019-07-22 Martin Liska PR 24768 * archive.c (_bfd_compute_and_write_armap): Come up with report_plugin_err variable. * bfd-in2.h (struct bfd): Add lto_slim_object flag. * elf.c (struct lto_section): New. (_bfd_elf_make_section_from_shdr): Parse content of .gnu_lto_.lto section. * elflink.c: Report error for a missing LTO plugin. * linker.c (_bfd_generic_link_add_one_symbol): Likewise. binutils/ChangeLog: 2019-07-22 Martin Liska PR 24768 * nm.c (filter_symbols): Set report_plugin_err if error is reported. (display_rel_file): Report error for a missing LTO plugin. gold/ChangeLog: 2019-07-22 Martin Liska PR 24768 * layout.h (class Layout): Add is_lto_slim_object and set_lto_slim_object. * object.cc (struct lto_section): Add lto_slim_object_. (big_endian>::do_layout): Parse content of .gnu_lto_.lto section. (big_endian>::do_add_symbols): Report error for a missing LTO plugin. --- bfd/elf.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'bfd/elf.c') diff --git a/bfd/elf.c b/bfd/elf.c index f47e88b..6b5d12c 100644 --- a/bfd/elf.c +++ b/bfd/elf.c @@ -999,6 +999,18 @@ convert_zdebug_to_debug (bfd *abfd, const char *name) return new_name; } +/* This a copy of lto_section defined in GCC (lto-streamer.h). */ + +struct lto_section +{ + int16_t major_version; + int16_t minor_version; + unsigned char slim_object; + + /* Flags is a private field that is not defined publicly. */ + uint16_t flags; +}; + /* Make a BFD section from an ELF section. We store a pointer to the BFD section in the bfd_section field of the header. */ @@ -1275,6 +1287,17 @@ _bfd_elf_make_section_from_shdr (bfd *abfd, newsect->flags |= SEC_ELF_RENAME; } + /* GCC uses .gnu.lto_.lto. as a LTO bytecode information + section. */ + const char *lto_section_name = ".gnu.lto_.lto."; + if (strncmp (name, lto_section_name, strlen (lto_section_name)) == 0) + { + struct lto_section lsection; + if (bfd_get_section_contents (abfd, newsect, &lsection, 0, + sizeof (struct lto_section))) + abfd->lto_slim_object = lsection.slim_object; + } + return TRUE; } -- cgit v1.1