https://sourceware.org/bugzilla/show_bug.cgi?id=22136
--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> --- (In reply to Nick Clifton from comment #6) > Hi H.J. > > > Why not use program property? > > I can see a couple of potential objections: > > * Separate debug info files do not (currently) contain any notes. Of cause, update will be needed. To generate a property, I use /* If features is set, add GNU_PROPERTY_X86_FEATURE_1_IBT and GNU_PROPERTY_X86_FEATURE_1_SHSTK. */ prop = _bfd_elf_get_property (ebfd, GNU_PROPERTY_X86_FEATURE_1_AND, 4); prop->u.number |= features; prop->pr_kind = property_number; /* Create the GNU property note section if needed. */ if (pbfd == NULL) { sec = bfd_make_section_with_flags (ebfd, NOTE_GNU_PROPERTY_SECTION_NAME, (SEC_ALLOC | SEC_LOAD | SEC_IN_MEMORY | SEC_READONLY | SEC_HAS_CONTENTS | SEC_DATA)); if (sec == NULL) info->callbacks->einfo (_("%F: failed to create GNU property section\n")); if (!bfd_set_section_alignment (ebfd, sec, class_align)) { error_alignment: info->callbacks->einfo (_("%F%A: failed to align section\n"), sec); } elf_section_type (sec) = SHT_NOTE; } > * It is harder for a tool to locate and parse the notes section > than to just examine the e_type field in the ELF header. Since > the point of this change is to allow ELF consumers to detect > non-ELF-conforming separate debug info files, allowing them to do > so easily would be a good idea. ELF consumers may already parse PT_NOTE segment. It isn't that hard to extend it to cover NT_GNU_PROPERTY_TYPE_0. > * The GNU Property Notes are currently only supported on x86 targets. That is not true. All ELF targets support: /* Values used in GNU .note.gnu.property notes (NT_GNU_PROPERTY_TYPE_0). */ #define GNU_PROPERTY_STACK_SIZE 1 #define GNU_PROPERTY_NO_COPY_ON_PROTECTED 2 [hjl@gnu-6 binutils]$ ../gas/as-new -o x.o /export/gnu/import/git/sources/binutils-gdb/binutils/testsuite/binutils-all/i386/pr21231a.s [hjl@gnu-6 binutils]$ ./readelf -n x.o Displaying notes found in: .note.gnu.property Owner Data size Description GNU 0x00000008 NT_GNU_PROPERTY_TYPE_0 Properties: no copy on protected [hjl@gnu-6 binutils]$ file x.o x.o: ELF 32-bit LSB relocatable, ARM, EABI5 version 1 (SYSV), not stripped [hjl@gnu-6 binutils]$ -- You are receiving this mail because: You are on the CC list for the bug. _______________________________________________ bug-binutils mailing list bug-binutils@gnu.org https://lists.gnu.org/mailman/listinfo/bug-binutils