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binutils/binutils-gnu-build-notes.patch

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Add support for GNU BUILD NOTEs.
2017-03-03 11:20:25 +00:00
diff -rup binutils.orig/binutils/doc/binutils.texi binutils-2.28/binutils/doc/binutils.texi
--- binutils.orig/binutils/doc/binutils.texi 2017-03-03 10:36:54.749752520 +0000
+++ binutils-2.28/binutils/doc/binutils.texi 2017-03-03 10:55:09.843757253 +0000
@@ -1140,6 +1140,7 @@ objcopy [@option{-F} @var{bfdname}|@opti
[@option{--compress-debug-sections}]
[@option{--decompress-debug-sections}]
[@option{--elf-stt-common=@var{val}}]
+ [@option{--merge-notes}]
[@option{-v}|@option{--verbose}]
[@option{-V}|@option{--version}]
[@option{--help}] [@option{--info}]
@@ -1956,6 +1957,10 @@ converted to the @code{STT_COMMON} or @c
@code{STT_COMMON}. @option{--elf-stt-common=no} converts common symbol
type to @code{STT_OBJECT}.
+@item --merge-notes
+For ELF files, attempt to reduce the size of any SHT_NOTE type
+sections by removing duplicate notes.
+
@item -V
@itemx --version
Show the version number of @command{objcopy}.
diff -rup binutils.orig/binutils/NEWS binutils-2.28/binutils/NEWS
--- binutils.orig/binutils/NEWS 2017-03-03 10:36:54.777751983 +0000
+++ binutils-2.28/binutils/NEWS 2017-03-03 10:49:43.114021660 +0000
@@ -1,5 +1,8 @@
-*- text -*-
+* Add --merge-notes options to objcopy to reduce the size of notes in
+ a binary file by merging and deleting redundant notes.
+
Changes in 2.28:
* Add support for locating separate debug info files using the build-id
diff -rup binutils.orig/binutils/objcopy.c binutils-2.28/binutils/objcopy.c
--- binutils.orig/binutils/objcopy.c 2017-03-03 10:36:54.780751925 +0000
+++ binutils-2.28/binutils/objcopy.c 2017-03-03 10:54:00.510086591 +0000
@@ -30,6 +30,7 @@
#include "elf-bfd.h"
#include "coff/internal.h"
#include "libcoff.h"
+#include "safe-ctype.h"
/* FIXME: See bfd/peXXigen.c for why we include an architecture specific
header in generic PE code. */
@@ -96,6 +97,10 @@ static bfd_boolean preserve_dates; /* Pr
static int deterministic = -1; /* Enable deterministic archives. */
static int status = 0; /* Exit status. */
+static bfd_boolean merge_notes = FALSE; /* Merge note sections. */
+static bfd_byte * merged_notes = NULL; /* Contents on note section undergoing a merge. */
+static bfd_size_type merged_size = 0; /* New, smaller size of the merged note section. */
+
enum strip_action
{
STRIP_UNDEF,
@@ -315,6 +320,7 @@ enum command_line_switch
OPTION_LOCALIZE_HIDDEN,
OPTION_LOCALIZE_SYMBOLS,
OPTION_LONG_SECTION_NAMES,
+ OPTION_MERGE_NOTES,
OPTION_NO_CHANGE_WARNINGS,
OPTION_ONLY_KEEP_DEBUG,
OPTION_PAD_TO,
@@ -436,6 +442,7 @@ static struct option copy_options[] =
{"localize-symbol", required_argument, 0, 'L'},
{"localize-symbols", required_argument, 0, OPTION_LOCALIZE_SYMBOLS},
{"long-section-names", required_argument, 0, OPTION_LONG_SECTION_NAMES},
+ {"merge-notes", no_argument, 0, 'M'},
{"no-adjust-warnings", no_argument, 0, OPTION_NO_CHANGE_WARNINGS},
{"no-change-warnings", no_argument, 0, OPTION_NO_CHANGE_WARNINGS},
{"only-keep-debug", no_argument, 0, OPTION_ONLY_KEEP_DEBUG},
@@ -634,6 +641,7 @@ copy_usage (FILE *stream, int exit_statu
--decompress-debug-sections Decompress DWARF debug sections using zlib\n\
--elf-stt-common=[yes|no] Generate ELF common symbols with STT_COMMON\n\
type\n\
+ -M --merge-notes Remove redundant entries in note sections\n\
-v --verbose List all object files modified\n\
@<file> Read options from <file>\n\
-V --version Display this program's version number\n\
@@ -1201,6 +1209,24 @@ is_update_section (bfd *abfd ATTRIBUTE_U
return FALSE;
}
+static bfd_boolean
+is_merged_note_section (bfd * abfd, asection * sec)
+{
+ if (merge_notes
+ && bfd_get_flavour (abfd) == bfd_target_elf_flavour
+ && elf_section_data (sec)->this_hdr.sh_type == SHT_NOTE
+ /* FIXME: We currently only support merging GNU_BUILD_NOTEs.
+ We should add support for more note types. */
+ && ((elf_section_data (sec)->this_hdr.sh_flags & SHF_GNU_BUILD_NOTE) != 0
+ /* Old versions of GAS (prior to 2.27) could not set the section
+ flags to OS-specific values, so we also accept sections with the
+ expected name. */
+ || (strcmp (sec->name, GNU_BUILD_ATTRS_SECTION_NAME) == 0)))
+ return TRUE;
+
+ return FALSE;
+}
+
/* See if a non-group section is being removed. */
static bfd_boolean
@@ -1818,6 +1844,255 @@ copy_unknown_object (bfd *ibfd, bfd *obf
return TRUE;
}
+/* Merge the notes on SEC, removing redundant entries.
+ Returns the new, smaller size of the section upon success. */
+
+static bfd_size_type
+merge_gnu_build_notes (bfd * abfd, asection * sec, bfd_size_type size, bfd_byte * contents)
+{
+ Elf_Internal_Note * pnotes_end;
+ Elf_Internal_Note * pnotes;
+ Elf_Internal_Note * pnote;
+ bfd_size_type remain = size;
+ unsigned version_notes_seen = 0;
+ bfd_boolean duplicate_found = FALSE;
+ const char * err = NULL;
+ bfd_byte * in = contents;
+
+ /* Make a copy of the notes.
+ Minimum size of a note is 12 bytes. */
+ pnote = pnotes = (Elf_Internal_Note *) xmalloc ((size / 12) * sizeof (Elf_Internal_Note));
+ while (remain >= 12)
+ {
+ pnote->namesz = (bfd_get_32 (abfd, in ) + 3) & ~3;
+ pnote->descsz = (bfd_get_32 (abfd, in + 4) + 3) & ~3;
+ pnote->type = bfd_get_32 (abfd, in + 8);
+
+ if (pnote->type != NT_GNU_BUILD_ATTRIBUTE_OPEN
+ && pnote->type != NT_GNU_BUILD_ATTRIBUTE_FUNC)
+ {
+ err = _("corrupt GNU build attribute note: wrong note type");
+ goto done;
+ }
+
+ if (pnote->namesz + pnote->descsz + 12 > remain)
+ {
+ err = _("corrupt GNU build attribute note: note too big");
+ goto done;
+ }
+
+ if (pnote->namesz < 2)
+ {
+ err = _("corrupt GNU build attribute note: name too small");
+ goto done;
+ }
+
+ if (pnote->descsz != 0
+ && pnote->descsz != 4
+ && pnote->descsz != 8)
+ {
+ err = _("corrupt GNU build attribute note: bad description size");
+ goto done;
+ }
+
+ pnote->namedata = (char *)(in + 12);
+ pnote->descdata = (char *)(in + 12 + pnote->namesz);
+
+ remain -= 12 + pnote->namesz + pnote->descsz;
+ in += 12 + pnote->namesz + pnote->descsz;
+
+ if (pnote->namesz > 1 && pnote->namedata[1] == GNU_BUILD_ATTRIBUTE_VERSION)
+ ++ version_notes_seen;
+ pnote ++;
+ }
+
+ pnotes_end = pnote;
+
+ /* Check that the notes are valid. */
+ if (remain != 0)
+ {
+ err = _("corrupt GNU build attribute notes: data at end");
+ goto done;
+ }
+
+ if (version_notes_seen == 0)
+ {
+ err = _("bad GNU build attribute notes: no version note");
+ goto done;
+ }
+
+ /* Merging is only needed if there is more than one version note... */
+ if (version_notes_seen == 1)
+ goto done;
+
+ /* The first note should be the first version note. */
+ if (pnotes[0].namedata[1] != GNU_BUILD_ATTRIBUTE_VERSION)
+ {
+ err = _("bad GNU build attribute notes: first note not version note");
+ goto done;
+ }
+
+ if (pnotes[0].namedata[0] != GNU_BUILD_ATTRIBUTE_TYPE_STRING
+ || strcmp (pnotes[0].namedata + 2, "1") != 0)
+ {
+ err = _("bad GNU build attribute notes: version note not v1");
+ goto done;
+ }
+
+ /* Now merge the notes. The rules are:
+ 1. Preserve the ordering of the notes.
+ 2. Preserve any NT_GNU_BUILD_ATTRIBUTE_FUNC notes.
+ 3. Eliminate any NT_GNU_BUILD_ATTRIBUTE_OPEN notes that have the same
+ full name field as the immediately preceeding note with the same type
+ of name.
+ 4. If an NT_GNU_BUILD_ATTRIBUTE_OPEN note is going to be preserved and
+ its description field is empty then the nearest preceeding OPEN note
+ with a non-empty description field must also be preserved *OR* the
+ description field of the note must be changed to contain the starting
+ address to which it refers. */
+ for (pnote = pnotes + 1; pnote < pnotes_end; pnote ++)
+ {
+ Elf_Internal_Note * back;
+ Elf_Internal_Note * prev_open = NULL;
+
+ if (pnote->type == NT_GNU_BUILD_ATTRIBUTE_FUNC)
+ continue;
+
+ /* Scan for duplicates. Clear the type field of any found - but do not
+ delete them just yet. */
+ for (back = pnote - 1; back >= pnotes; back --)
+ {
+ if (back->descsz > 0
+ && back->type != NT_GNU_BUILD_ATTRIBUTE_FUNC
+ && prev_open == NULL)
+ prev_open = back;
+
+ if (back->type == pnote->type
+ && back->namedata[1] == pnote->namedata[1])
+ {
+ if (back->namesz == pnote->namesz
+ && memcmp (back->namedata, pnote->namedata, back->namesz) == 0)
+ {
+ duplicate_found = TRUE;
+ pnote->type = 0;
+ break;
+ }
+
+ /* If we have found an attribute match then stop searching backwards. */
+ if (! ISPRINT (back->namedata[1])
+ || strcmp (back->namedata + 2, pnote->namedata + 2) == 0)
+ {
+ /* Since we are keeping this note we must check to see if its
+ description refers back to an earlier OPEN note. If so
+ then we must make sure that version note is also preserved. */
+ if (pnote->descsz == 0
+ && prev_open != NULL
+ && prev_open->type == 0)
+ prev_open->type = NT_GNU_BUILD_ATTRIBUTE_FUNC;
+
+ break;
+ }
+ }
+ }
+ }
+
+ if (duplicate_found)
+ {
+ bfd_byte * new_contents;
+ bfd_byte * old;
+ bfd_byte * new;
+ bfd_size_type new_size;
+ arelent ** relpp = NULL;
+ long relsize;
+ long relcount = 0;
+
+ relsize = bfd_get_reloc_upper_bound (abfd, sec);
+ if (relsize > 0)
+ {
+ /* If there are relocs associated with this section then we may
+ have to adjust them as well, as we remove notes. */
+ relpp = (arelent **) xmalloc (relsize);
+ relcount = bfd_canonicalize_reloc (abfd, sec, relpp, isympp);
+ if (relcount < 0)
+ /* Do not bother complaining here - copy_relocations_in_section
+ will do that for us. */
+ relcount = 0;
+ }
+
+ /* Eliminate the duplicates. */
+ new = new_contents = xmalloc (size);
+ for (pnote = pnotes, old = contents;
+ pnote < pnotes_end;
+ pnote ++)
+ {
+ bfd_size_type note_size = 12 + pnote->namesz + pnote->descsz;
+
+ if (pnote->type == 0)
+ {
+ if (relcount > 0)
+ {
+ arelent ** rel;
+
+ /* If there is a reloc at the current offset, delete it.
+ Adjust the location of any relocs above the current
+ location downwards by the size of the note being deleted.
+ FIXME: We could optimize this loop by retaining a pointer to
+ the last reloc below the current note. */
+ for (rel = relpp; rel < relpp + relcount; rel ++)
+ {
+ if ((* rel)->howto == NULL)
+ continue;
+ if ((* rel)->address < (bfd_vma) (new - new_contents))
+ continue;
+ if ((* rel)->address >= (bfd_vma) ((new + note_size) - new_contents))
+ (* rel)->address -= note_size;
+ else
+ (* rel)->howto = NULL;
+ }
+ }
+ }
+ else
+ {
+ memcpy (new, old, note_size);
+ new += note_size;
+ }
+
+ old += note_size;
+ }
+
+ new_size = new - new_contents;
+ memcpy (contents, new_contents, new_size);
+ size = new_size;
+ free (new_contents);
+
+ if (relcount > 0)
+ {
+ arelent ** rel;
+
+ for (rel = relpp; rel < relpp + relcount; rel ++)
+ if ((* rel)->howto == NULL)
+ {
+ /* Delete eliminated relocs.
+ FIXME: There are better ways to do this. */
+ memmove (rel, rel + 1, ((relcount - (rel - relpp)) - 1) * sizeof (* rel));
+ relcount --;
+ }
+ bfd_set_reloc (abfd, sec, relpp, relcount);
+ }
+ }
+
+ done:
+ if (err)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ bfd_nonfatal_message (NULL, abfd, sec, err);
+ status = 1;
+ }
+
+ free (pnotes);
+ return size;
+}
+
/* Copy object file IBFD onto OBFD.
Returns TRUE upon success, FALSE otherwise. */
@@ -2145,6 +2420,57 @@ copy_object (bfd *ibfd, bfd *obfd, const
}
}
+ if (merge_notes)
+ {
+ asection *osec;
+
+ /* This palaver is necessary because we must set the output
+ section size first, before its contents are ready. */
+ osec = bfd_get_section_by_name (ibfd, GNU_BUILD_ATTRS_SECTION_NAME);
+ if (osec && is_merged_note_section (ibfd, osec))
+ {
+ bfd_size_type size;
+
+ size = bfd_get_section_size (osec);
+ if (size == 0)
+ {
+ bfd_nonfatal_message (NULL, ibfd, osec, _("warning: note section is empty"));
+ merge_notes = FALSE;
+ }
+ else if (! bfd_get_full_section_contents (ibfd, osec, & merged_notes))
+ {
+ bfd_nonfatal_message (NULL, ibfd, osec, _("warning: could not load note section"));
+ free (merged_notes);
+ merged_notes = NULL;
+ merge_notes = FALSE;
+ }
+ else
+ {
+ merged_size = merge_gnu_build_notes (ibfd, osec, size, merged_notes);
+ if (merged_size == size)
+ {
+ /* Merging achieves nothing. */
+ free (merged_notes);
+ merged_notes = NULL;
+ merge_notes = FALSE;
+ merged_size = 0;
+ }
+ else
+ {
+ if (osec->output_section == NULL
+ || ! bfd_set_section_size (obfd, osec->output_section, merged_size))
+ {
+ bfd_nonfatal_message (NULL, obfd, osec, _("warning: failed to set merged notes size"));
+ free (merged_notes);
+ merged_notes = NULL;
+ merge_notes = FALSE;
+ merged_size = 0;
+ }
+ }
+ }
+ }
+ }
+
if (dump_sections != NULL)
{
struct section_add * pdump;
@@ -2454,6 +2780,24 @@ copy_object (bfd *ibfd, bfd *obfd, const
}
}
+ if (merge_notes)
+ {
+ asection * osec = bfd_get_section_by_name (obfd, GNU_BUILD_ATTRS_SECTION_NAME);
+ if (osec && is_merged_note_section (obfd, osec))
+ {
+ if (! bfd_set_section_contents (obfd, osec, merged_notes, 0, merged_size))
+ {
+ bfd_nonfatal_message (NULL, obfd, osec, _("error: failed to copy merged notes into output"));
+ return FALSE;
+ }
+ }
+ else
+ bfd_nonfatal_message (NULL, obfd, osec, _("ICE: lost merged note section"));
+ free (merged_notes);
+ merged_notes = NULL;
+ merge_notes = FALSE;
+ }
+
if (gnu_debuglink_filename != NULL)
{
if (! bfd_fill_in_gnu_debuglink_section
@@ -3179,7 +3523,7 @@ setup_section (bfd *ibfd, sec_ptr isecti
/* Return TRUE if input section ISECTION should be skipped. */
static bfd_boolean
-skip_section (bfd *ibfd, sec_ptr isection)
+skip_section (bfd *ibfd, sec_ptr isection, bfd_boolean skip_copy)
{
sec_ptr osection;
bfd_size_type size;
@@ -3199,6 +3543,11 @@ skip_section (bfd *ibfd, sec_ptr isectio
if (is_update_section (ibfd, isection))
return TRUE;
+ /* When merging a note section we skip the copying of the contents,
+ but not the copying of the relocs associated with the contents. */
+ if (skip_copy && is_merged_note_section (ibfd, isection))
+ return TRUE;
+
flags = bfd_get_section_flags (ibfd, isection);
if ((flags & SEC_GROUP) != 0)
return TRUE;
@@ -3265,7 +3614,7 @@ copy_relocations_in_section (bfd *ibfd,
long relcount;
sec_ptr osection;
- if (skip_section (ibfd, isection))
+ if (skip_section (ibfd, isection, FALSE))
return;
osection = isection->output_section;
@@ -3354,7 +3703,7 @@ copy_section (bfd *ibfd, sec_ptr isectio
sec_ptr osection;
bfd_size_type size;
- if (skip_section (ibfd, isection))
+ if (skip_section (ibfd, isection, TRUE))
return;
osection = isection->output_section;
@@ -4010,7 +4359,7 @@ copy_main (int argc, char *argv[])
struct stat statbuf;
const bfd_arch_info_type *input_arch = NULL;
- while ((c = getopt_long (argc, argv, "b:B:i:I:j:K:N:s:O:d:F:L:G:R:SpgxXHhVvW:wDU",
+ while ((c = getopt_long (argc, argv, "b:B:i:I:j:K:MN:s:O:d:F:L:G:R:SpgxXHhVvW:wDU",
copy_options, (int *) 0)) != EOF)
{
switch (c)
@@ -4104,6 +4453,10 @@ copy_main (int argc, char *argv[])
add_specific_symbol (optarg, keep_specific_htab);
break;
+ case 'M':
+ merge_notes = TRUE;
+ break;
+
case 'N':
add_specific_symbol (optarg, strip_specific_htab);
break;
diff -rup binutils.orig/binutils/readelf.c binutils-2.28/binutils/readelf.c
--- binutils.orig/binutils/readelf.c 2017-03-03 10:36:54.907749491 +0000
+++ binutils-2.28/binutils/readelf.c 2017-03-03 10:49:10.247651809 +0000
@@ -15557,6 +15557,10 @@ get_note_type (unsigned e_type)
return _("NT_VERSION (version)");
case NT_ARCH:
return _("NT_ARCH (architecture)");
+ case NT_GNU_BUILD_ATTRIBUTE_OPEN:
+ return _("NT_GNU_BUILD_ATTRIBUTE_OPEN");
+ case NT_GNU_BUILD_ATTRIBUTE_FUNC:
+ return _("NT_GNU_BUILD_ATTRIBUTE_FUNC");
default:
break;
}
@@ -15665,6 +15669,12 @@ get_gnu_elf_note_type (unsigned e_type)
return _("NT_GNU_BUILD_ID (unique build ID bitstring)");
case NT_GNU_GOLD_VERSION:
return _("NT_GNU_GOLD_VERSION (gold version)");
+ case NT_GNU_PROPERTY_TYPE_0:
+ return _("NT_GNU_PROPERTY_TYPE_0");
+ case NT_GNU_BUILD_ATTRIBUTE_OPEN:
+ return _("NT_GNU_BUILD_ATTRIBUTE_OPEN");
+ case NT_GNU_BUILD_ATTRIBUTE_FUNC:
+ return _("NT_GNU_BUILD_ATTRIBUTE_FUNC");
default:
{
static char buff[64];
@@ -15675,6 +15685,122 @@ get_gnu_elf_note_type (unsigned e_type)
}
}
+static void
+decode_x86_isa (unsigned long bitmask)
+{
+ while (bitmask)
+ {
+ unsigned long bit = bitmask & (- bitmask);
+
+ bitmask &= ~ bit;
+ switch (bit)
+ {
+ case GNU_PROPERTY_X86_ISA_1_486: printf ("i486"); break;
+ case GNU_PROPERTY_X86_ISA_1_586: printf ("586"); break;
+ case GNU_PROPERTY_X86_ISA_1_686: printf ("686"); break;
+ case GNU_PROPERTY_X86_ISA_1_SSE: printf ("SSE"); break;
+ case GNU_PROPERTY_X86_ISA_1_SSE2: printf ("SSE2"); break;
+ case GNU_PROPERTY_X86_ISA_1_SSE3: printf ("SSE3"); break;
+ case GNU_PROPERTY_X86_ISA_1_SSSE3: printf ("SSSE3"); break;
+ case GNU_PROPERTY_X86_ISA_1_SSE4_1: printf ("SSE4_1"); break;
+ case GNU_PROPERTY_X86_ISA_1_SSE4_2: printf ("SSE4_2"); break;
+ case GNU_PROPERTY_X86_ISA_1_AVX: printf ("AVX"); break;
+ case GNU_PROPERTY_X86_ISA_1_AVX2: printf ("AVX2"); break;
+ case GNU_PROPERTY_X86_ISA_1_AVX512F: printf ("AVX512F"); break;
+ case GNU_PROPERTY_X86_ISA_1_AVX512CD: printf ("AVX512CD"); break;
+ case GNU_PROPERTY_X86_ISA_1_AVX512ER: printf ("AVX512ER"); break;
+ case GNU_PROPERTY_X86_ISA_1_AVX512PF: printf ("AVX512PF"); break;
+ case GNU_PROPERTY_X86_ISA_1_AVX512VL: printf ("AVX512VL"); break;
+ case GNU_PROPERTY_X86_ISA_1_AVX512DQ: printf ("AVX512DQ"); break;
+ case GNU_PROPERTY_X86_ISA_1_AVX512BW: printf ("AVX512BW"); break;
+ default: printf (_("<unknown: %lx>"), bit); break;
+ }
+ if (bitmask)
+ printf (", ");
+ }
+}
+
+static void
+print_gnu_property_note (Elf_Internal_Note * pnote)
+{
+ unsigned char * ptr = (unsigned char *) pnote->descdata;
+ unsigned char * ptr_end = ptr + pnote->descsz;
+ unsigned int size = is_32bit_elf ? 4 : 8;
+
+ printf (_(" Properties: "));
+
+ if (pnote->descsz % size)
+ {
+ printf (_("<corrupt GNU_PROPERTY_TYPE, size = %#lx>\n"), pnote->descsz);
+ return;
+ }
+
+ while (ptr < (ptr_end - (size * 2)))
+ {
+ unsigned long j;
+ unsigned long type = byte_get (ptr, size);
+ unsigned long datasz = byte_get (ptr + size, size);
+
+ ptr += 2 * size;
+
+ switch (type)
+ {
+ case GNU_PROPERTY_STACK_SIZE:
+ printf (_("stack size: "));
+ if (datasz != size || (ptr + size > ptr_end))
+ printf (_("<corrupt length: %#lx> "), datasz);
+ else
+ printf ("%#lx", (unsigned long) byte_get (ptr, size));
+ break;
+
+ case GNU_PROPERTY_NO_COPY_ON_PROTECTED:
+ printf ("no copy on protected ");
+ if (datasz)
+ printf (_("<corrupt length: %#lx> "), datasz);
+ break;
+
+ case GNU_PROPERTY_X86_ISA_1_USED:
+ printf ("x86 ISA used: ");
+ if (datasz != size || (ptr + size > ptr_end))
+ printf (_("<corrupt length: %#lx> "), datasz);
+ else
+ decode_x86_isa (byte_get (ptr, size));
+ break;
+
+ case GNU_PROPERTY_X86_ISA_1_NEEDED:
+ printf ("x86 ISA needed: ");
+ if (datasz != size || (ptr + size > ptr_end))
+ printf (_("<corrupt length: %#lx> "), datasz);
+ else
+ decode_x86_isa (byte_get (ptr, size));
+ break;
+
+ default:
+ printf (_("<unknown type %#lx data: "), type);
+ if (ptr + datasz > ptr_end)
+ {
+ printf (_("corrupt datasz: %#lx>\n"), datasz);
+ break;
+ }
+ for (j = 0; j < datasz; ++j)
+ printf ("%02x ", ptr[j] & 0xff);
+ printf (">");
+ break;
+ }
+
+ ptr += ((datasz + (size - 1)) & ~ (size - 1));
+ if (ptr < (ptr_end - (size * 2)))
+ {
+ if (do_wide)
+ printf (", ");
+ else
+ printf ("\n\t");
+ }
+ }
+
+ printf ("\n");
+}
+
static int
print_gnu_note (Elf_Internal_Note *pnote)
{
@@ -15775,6 +15901,10 @@ print_gnu_note (Elf_Internal_Note *pnote
}
break;
+ case NT_GNU_PROPERTY_TYPE_0:
+ print_gnu_property_note (pnote);
+ break;
+
default:
/* Handle unrecognised types. An error message should have already been
created by get_gnu_elf_note_type(), so all that we need to do is to
@@ -16164,15 +16294,300 @@ print_ia64_vms_note (Elf_Internal_Note *
return 1;
}
+static bfd_boolean
+print_gnu_build_attribute_description (Elf_Internal_Note * pnote,
+ FILE * file,
+ Elf_Internal_Shdr * section ATTRIBUTE_UNUSED)
+{
+ static unsigned long global_offset = 0;
+ unsigned long i;
+ unsigned long strtab_size = 0;
+ char * strtab = NULL;
+ Elf_Internal_Sym * symtab = NULL;
+ unsigned long nsyms = 0;
+ Elf_Internal_Shdr * symsec = NULL;
+ unsigned int desc_size = is_32bit_elf ? 4 : 8;
+
+ if (pnote->descsz == 0)
+ {
+ printf (_(" Applies from offset %#lx\n"), global_offset);
+ return TRUE;
+ }
+
+ if (pnote->descsz != desc_size)
+ {
+ error (_(" <invalid description size: %lx>\n"), pnote->descsz);
+ printf (_(" <invalid descsz>"));
+ return FALSE;
+ }
+
+ /* Load the symbols. */
+ for (symsec = section_headers;
+ symsec < section_headers + elf_header.e_shnum;
+ symsec ++)
+ {
+ if (symsec->sh_type == SHT_SYMTAB)
+ {
+ symtab = GET_ELF_SYMBOLS (file, symsec, & nsyms);
+
+ if (symsec->sh_link < elf_header.e_shnum)
+ {
+ Elf_Internal_Shdr * strtab_sec = section_headers + symsec->sh_link;
+
+ strtab = (char *) get_data (NULL, file, strtab_sec->sh_offset,
+ 1, strtab_sec->sh_size,
+ _("string table"));
+ strtab_size = strtab != NULL ? strtab_sec->sh_size : 0;
+ }
+ }
+ }
+
+ printf (_(" Applies from offset"));
+
+ for (i = 0; i < pnote->descsz; i += desc_size)
+ {
+ Elf_Internal_Sym * saved_sym = NULL;
+ Elf_Internal_Sym * sym;
+ unsigned long offset;
+
+ offset = byte_get ((unsigned char *) pnote->descdata + i, desc_size);
+
+ if (i + desc_size == pnote->descsz)
+ printf (_(" %#lx"), offset);
+ else
+ printf (_(" %#lx, "), offset);
+
+ if (pnote->type == NT_GNU_BUILD_ATTRIBUTE_OPEN)
+ global_offset = offset;
+
+ if (symtab == NULL || strtab == NULL)
+ continue;
+
+ /* Find a symbol whose value matches offset. */
+ for (sym = symtab; sym < symtab + nsyms; sym ++)
+ if (sym->st_value == offset)
+ {
+ if (sym->st_name < strtab_size)
+ {
+ if (strtab[sym->st_name] == 0)
+ continue;
+
+ if (pnote->type == NT_GNU_BUILD_ATTRIBUTE_OPEN)
+ {
+ /* For OPEN attributes we prefer GLOBAL symbols, if there
+ is one that matches. But keep a record of a matching
+ LOCAL symbol, just in case that is all that we can find. */
+ if (ELF_ST_BIND (sym->st_info) == STB_LOCAL)
+ {
+ saved_sym = sym;
+ continue;
+ }
+ printf (_(" (file: %s)"), strtab + sym->st_name);
+ }
+ else if (ELF_ST_TYPE (sym->st_info) != STT_FUNC)
+ continue;
+ else
+ printf (_(" (function: %s)"), strtab + sym->st_name);
+ break;
+ }
+ }
+
+ if (sym == symtab + nsyms)
+ {
+ if (saved_sym)
+ printf (_(" (file: %s)"), strtab + saved_sym->st_name);
+ else
+ printf (_(" (<symbol name unknown>)"));
+ }
+ }
+
+ printf ("\n");
+ return TRUE;
+}
+
+static bfd_boolean
+print_gnu_build_attribute_name (Elf_Internal_Note * pnote)
+{
+ char name_type;
+ char name_attribute;
+ char * expected_types;
+ const char * name = pnote->namedata;
+ const char * text;
+ int left;
+
+ if (name == NULL || pnote->namesz < 2)
+ {
+ error (_("corrupt name field in GNU build attribute note: size = %ld\n"), pnote->namesz);
+ print_symbol (-20, _(" <corrupt name field>"));
+ return FALSE;
+ }
+
+ switch ((name_type = * name))
+ {
+ case GNU_BUILD_ATTRIBUTE_TYPE_NUMERIC:
+ case GNU_BUILD_ATTRIBUTE_TYPE_STRING:
+ case GNU_BUILD_ATTRIBUTE_TYPE_BOOL_TRUE:
+ case GNU_BUILD_ATTRIBUTE_TYPE_BOOL_FALSE:
+ printf ("%c", * name);
+ break;
+ default:
+ error (_("unrecognised attribute type in name field: %d\n"), name_type);
+ print_symbol (-20, _("<unknown name type>"));
+ return FALSE;
+ }
+
+ left = 19;
+ ++ name;
+ text = NULL;
+
+ switch ((name_attribute = * name))
+ {
+ case GNU_BUILD_ATTRIBUTE_VERSION:
+ text = _("<version>");
+ expected_types = "$";
+ ++ name;
+ break;
+ case GNU_BUILD_ATTRIBUTE_STACK_PROT:
+ text = _("<stack prot>");
+ expected_types = "!+";
+ ++ name;
+ break;
+ case GNU_BUILD_ATTRIBUTE_RELRO:
+ text = _("<relro>");
+ expected_types = "!+";
+ ++ name;
+ break;
+ case GNU_BUILD_ATTRIBUTE_STACK_SIZE:
+ text = _("<stack size>");
+ expected_types = "*";
+ ++ name;
+ break;
+ case GNU_BUILD_ATTRIBUTE_TOOL:
+ text = _("<tool>");
+ expected_types = "$";
+ ++ name;
+ break;
+ case GNU_BUILD_ATTRIBUTE_ABI:
+ text = _("<ABI>");
+ expected_types = "$*";
+ ++ name;
+ break;
+ case GNU_BUILD_ATTRIBUTE_PIC:
+ text = _("<PIC>");
+ expected_types = "*";
+ ++ name;
+ break;
+
+ default:
+ if (ISPRINT (* name))
+ {
+ int len = strnlen (name, pnote->namesz - (name - pnote->namedata)) + 1;
+
+ if (len > left && ! do_wide)
+ len = left;
+ printf ("%.*s ", len, name);
+ left -= len;
+ name += len + 1;
+ }
+ else
+ {
+ error (_("unexpected character in name field\n"));
+ print_symbol (- left, _("<unknown attribute>"));
+ return 0;
+ }
+ expected_types = "*$!+";
+ break;
+ }
+
+ if (text)
+ {
+ printf ("%s", text);
+ left -= strlen (text);
+ }
+
+ if (strchr (expected_types, name_type) == NULL)
+ warn (_("attribute does not have the expected type\n"));
+
+ if ((unsigned long)(name - pnote->namedata) > pnote->namesz)
+ {
+ error (_("corrupt name field: namesz: %lu but parsing gets to %ld\n"),
+ (unsigned long) pnote->namesz,
+ (long) (name - pnote->namedata));
+ return FALSE;
+ }
+
+ if (left < 1 && ! do_wide)
+ return TRUE;
+
+ switch (name_type)
+ {
+ case GNU_BUILD_ATTRIBUTE_TYPE_NUMERIC:
+ {
+ unsigned int bytes = pnote->namesz - (name - pnote->namedata);
+ unsigned long val = 0;
+ unsigned int shift = 0;
+
+ while (bytes --)
+ {
+ val |= ((* name ++) << shift);
+ shift += 8;
+ }
+
+ if (name_attribute == GNU_BUILD_ATTRIBUTE_PIC)
+ {
+ char * pic_type = NULL;
+
+ switch (val)
+ {
+ case 0: pic_type = "static"; break;
+ case 1: pic_type = "pic"; break;
+ case 2: pic_type = "PIC"; break;
+ case 3: pic_type = "pie"; break;
+ case 4: pic_type = "PIE"; break;
+ }
+
+ if (pic_type != NULL)
+ {
+ if (do_wide)
+ left -= printf ("%s", pic_type);
+ else
+ left -= printf ("%-.*s", left, pic_type);
+ break;
+ }
+ }
+
+ if (do_wide)
+ left -= printf ("0x%lx", val);
+ else
+ left -= printf ("0x%-.*lx", left, val);
+ }
+ break;
+ case GNU_BUILD_ATTRIBUTE_TYPE_STRING:
+ left -= print_symbol (- left, name);
+ break;
+ case GNU_BUILD_ATTRIBUTE_TYPE_BOOL_TRUE:
+ left -= print_symbol (- left, "true");
+ break;
+ case GNU_BUILD_ATTRIBUTE_TYPE_BOOL_FALSE:
+ left -= print_symbol (- left, "false");
+ break;
+ }
+
+ if (do_wide && left > 0)
+ printf ("%-*s", left, " ");
+
+ return TRUE;
+}
+
/* Note that by the ELF standard, the name field is already null byte
terminated, and namesz includes the terminating null byte.
I.E. the value of namesz for the name "FSF" is 4.
If the value of namesz is zero, there is no name present. */
static int
-process_note (Elf_Internal_Note * pnote,
- FILE * file ATTRIBUTE_UNUSED,
- Elf_Internal_Shdr * section ATTRIBUTE_UNUSED)
+process_note (Elf_Internal_Note * pnote,
+ FILE * file,
+ Elf_Internal_Shdr * section)
{
const char * name = pnote->namesz ? pnote->namedata : "(NONE)";
const char * nt;
@@ -16218,8 +16633,17 @@ process_note (Elf_Internal_Note * pnote,
nt = get_note_type (pnote->type);
printf (" ");
- print_symbol (-20, name);
- printf (" 0x%08lx\t%s\n", pnote->descsz, nt);
+
+ if (pnote->type == NT_GNU_BUILD_ATTRIBUTE_OPEN
+ || pnote->type == NT_GNU_BUILD_ATTRIBUTE_FUNC)
+ print_gnu_build_attribute_name (pnote);
+ else
+ print_symbol (-20, name);
+
+ if (do_wide)
+ printf (" 0x%08lx\t%s\t", pnote->descsz, nt);
+ else
+ printf (" 0x%08lx\t%s\n", pnote->descsz, nt);
if (const_strneq (pnote->namedata, "IPF/VMS"))
return print_ia64_vms_note (pnote);
@@ -16229,17 +16653,22 @@ process_note (Elf_Internal_Note * pnote,
return print_stapsdt_note (pnote);
else if (const_strneq (pnote->namedata, "CORE"))
return print_core_note (pnote);
+ else if (pnote->type == NT_GNU_BUILD_ATTRIBUTE_OPEN
+ || pnote->type == NT_GNU_BUILD_ATTRIBUTE_FUNC)
+ return print_gnu_build_attribute_description (pnote, file, section);
- else if (pnote->descsz)
+ if (pnote->descsz)
{
unsigned long i;
printf (_(" description data: "));
for (i = 0; i < pnote->descsz; i++)
printf ("%02x ", pnote->descdata[i]);
- printf ("\n");
}
+ if (do_wide)
+ printf ("\n");
+
return 1;
}
Only in binutils-2.28/binutils/testsuite/binutils-all: note-2-32.d
Only in binutils-2.28/binutils/testsuite/binutils-all: note-2-32.s
Only in binutils-2.28/binutils/testsuite/binutils-all: note-2-64.d
Only in binutils-2.28/binutils/testsuite/binutils-all: note-2-64.s
diff -rup binutils.orig/binutils/testsuite/binutils-all/objcopy.exp binutils-2.28/binutils/testsuite/binutils-all/objcopy.exp
--- binutils.orig/binutils/testsuite/binutils-all/objcopy.exp 2017-03-03 10:36:54.973748226 +0000
+++ binutils-2.28/binutils/testsuite/binutils-all/objcopy.exp 2017-03-03 10:56:08.251637396 +0000
@@ -1053,6 +1053,11 @@ if [is_elf_format] {
run_dump_test "group-6"
run_dump_test "copy-1"
run_dump_test "note-1"
+ if [is_elf64 tmpdir/bintest.o] {
+ run_dump_test "note-2-64"
+ } else {
+ run_dump_test "note-2-32"
+ }
}
run_dump_test "copy-2"
diff -rup binutils.orig/include/elf/common.h binutils-2.28/include/elf/common.h
--- binutils.orig/include/elf/common.h 2017-03-03 10:36:57.673696476 +0000
+++ binutils-2.28/include/elf/common.h 2017-03-03 10:38:21.515089483 +0000
@@ -538,6 +538,7 @@
/* #define SHF_MASKOS 0x0F000000 *//* OS-specific semantics */
#define SHF_MASKOS 0x0FF00000 /* New value, Oct 4, 1999 Draft */
+#define SHF_GNU_BUILD_NOTE (1 << 20) /* Section contains GNU BUILD ATTRIBUTE notes. */
#define SHF_MASKPROC 0xF0000000 /* Processor-specific semantics */
/* This used to be implemented as a processor specific section flag.
@@ -669,6 +670,51 @@
#define NT_GNU_HWCAP 2 /* Used by ld.so and kernel vDSO. */
#define NT_GNU_BUILD_ID 3 /* Generated by ld --build-id. */
#define NT_GNU_GOLD_VERSION 4 /* Generated by gold. */
+#define NT_GNU_PROPERTY_TYPE_0 5 /* Generated by gcc. */
+
+#define NT_GNU_BUILD_ATTRIBUTE_OPEN 0x100
+#define NT_GNU_BUILD_ATTRIBUTE_FUNC 0x101
+
+#define GNU_BUILD_ATTRIBUTE_TYPE_NUMERIC '*'
+#define GNU_BUILD_ATTRIBUTE_TYPE_STRING '$'
+#define GNU_BUILD_ATTRIBUTE_TYPE_BOOL_TRUE '+'
+#define GNU_BUILD_ATTRIBUTE_TYPE_BOOL_FALSE '!'
+
+#define GNU_BUILD_ATTRIBUTE_VERSION 1
+#define GNU_BUILD_ATTRIBUTE_STACK_PROT 2
+#define GNU_BUILD_ATTRIBUTE_RELRO 3
+#define GNU_BUILD_ATTRIBUTE_STACK_SIZE 4
+#define GNU_BUILD_ATTRIBUTE_TOOL 5
+#define GNU_BUILD_ATTRIBUTE_ABI 6
+#define GNU_BUILD_ATTRIBUTE_PIC 7
+
+#define NOTE_GNU_PROPERTY_SECTION_NAME ".note.gnu.property"
+#define GNU_BUILD_ATTRS_SECTION_NAME ".gnu.build.attributes"
+
+/* 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
+#define GNU_PROPERTY_X86_ISA_1_USED 0xc0000000
+#define GNU_PROPERTY_X86_ISA_1_NEEDED 0xc0000001
+
+#define GNU_PROPERTY_X86_ISA_1_486 (1U << 0)
+#define GNU_PROPERTY_X86_ISA_1_586 (1U << 1)
+#define GNU_PROPERTY_X86_ISA_1_686 (1U << 2)
+#define GNU_PROPERTY_X86_ISA_1_SSE (1U << 3)
+#define GNU_PROPERTY_X86_ISA_1_SSE2 (1U << 4)
+#define GNU_PROPERTY_X86_ISA_1_SSE3 (1U << 5)
+#define GNU_PROPERTY_X86_ISA_1_SSSE3 (1U << 6)
+#define GNU_PROPERTY_X86_ISA_1_SSE4_1 (1U << 7)
+#define GNU_PROPERTY_X86_ISA_1_SSE4_2 (1U << 8)
+#define GNU_PROPERTY_X86_ISA_1_AVX (1U << 9)
+#define GNU_PROPERTY_X86_ISA_1_AVX2 (1U << 10)
+#define GNU_PROPERTY_X86_ISA_1_AVX512F (1U << 11)
+#define GNU_PROPERTY_X86_ISA_1_AVX512CD (1U << 12)
+#define GNU_PROPERTY_X86_ISA_1_AVX512ER (1U << 13)
+#define GNU_PROPERTY_X86_ISA_1_AVX512PF (1U << 14)
+#define GNU_PROPERTY_X86_ISA_1_AVX512VL (1U << 15)
+#define GNU_PROPERTY_X86_ISA_1_AVX512DQ (1U << 16)
+#define GNU_PROPERTY_X86_ISA_1_AVX512BW (1U << 17)
/* Values used in GNU .note.ABI-tag notes (NT_GNU_ABI_TAG). */
#define GNU_ABI_TAG_LINUX 0
--- /dev/null 2017-03-03 08:02:17.248891465 +0000
+++ binutils-2.28/binutils/testsuite/binutils-all/note-2-32.s 2017-03-03 10:56:46.811898078 +0000
@@ -0,0 +1,93 @@
+ .text
+ .org 0x100
+ .global note1.s
+note1.s:
+ .word 0
+
+ .pushsection .gnu.build.attributes, "0x100000", %note
+ .balign 4
+ .dc.l 4
+ .dc.l 4
+ .dc.l 0x100
+ .asciz "$1"
+ .dc.l note1.s
+
+ .dc.l 12
+ .dc.l 0
+ .dc.l 0x100
+ .asciz "$gcc 7.0.1"
+
+ .dc.l 2
+ .dc.l 0
+ .dc.l 0x100
+ .dc.b 0x2b, 0x2
+ .dc.b 0, 0
+
+ .dc.l 3
+ .dc.l 0
+ .dc.l 0x100
+ .dc.b 0x2a, 0x7, 0
+ .dc.b 0
+
+ .dc.l 3
+ .dc.l 0
+ .dc.l 0x100
+ .dc.b 0x2a, 0x6, 0
+ .dc.b 0
+ .popsection
+
+
+ .global note2.s
+note2.s:
+ .word 0x100
+
+ .pushsection .gnu.build.attributes, "0x100000", %note
+ .dc.l 4
+ .dc.l 4
+ .dc.l 0x100
+ .asciz "$1"
+ .dc.l note2.s
+
+ .dc.l 12
+ .dc.l 0
+ .dc.l 0x100
+ .asciz "$gcc 7.0.1"
+
+ .dc.l 2
+ .dc.l 0
+ .dc.l 0x100
+ .dc.b 0x21, 0x2
+ .dc.b 0, 0
+
+ .dc.l 3
+ .dc.l 0
+ .dc.l 0x101
+ .dc.b 0x2a, 0x7, 1
+ .dc.b 0
+
+ .dc.l 3
+ .dc.l 0
+ .dc.l 0x100
+ .dc.b 0x2a, 0x6, 0
+ .dc.b 0
+ .popsection
+
+ .global note3.s
+note3.s:
+ .word 0x100
+
+ .pushsection .gnu.build.attributes, "0x100000", %note
+ .dc.l 4
+ .dc.l 4
+ .dc.l 0x100
+ .asciz "$1"
+ .dc.l note3.s
+
+ .dc.l 12
+ .dc.l 0
+ .dc.l 0x100
+ .asciz "$gcc 7.0.1"
+
+ .popsection
+
+
--- /dev/null 2017-03-03 08:02:17.248891465 +0000
+++ binutils-2.28/binutils/testsuite/binutils-all/note-2-32.d 2017-03-03 10:56:46.811898078 +0000
@@ -0,0 +1,17 @@
+#PROG: objcopy
+#readelf: --notes --wide
+#objcopy: --merge-notes
+#name: merge notes section (32-bits)
+#source: note-2-32.s
+
+#...
+ Owner Data size Description
+[ ]+\$<version>1[ ]+0x00000004[ ]+NT_GNU_BUILD_ATTRIBUTE_OPEN[ ]+Applies from offset 0x100 \(file: note1.s\)
+[ ]+\$<tool>gcc 7.0.1[ ]+0x00000000[ ]+NT_GNU_BUILD_ATTRIBUTE_OPEN[ ]+Applies from offset 0x100
+[ ]+\+<stack prot>true[ ]+0x00000000[ ]+NT_GNU_BUILD_ATTRIBUTE_OPEN[ ]+Applies from offset 0x100
+[ ]+\*<PIC>static[ ]+0x00000000[ ]+NT_GNU_BUILD_ATTRIBUTE_OPEN[ ]+Applies from offset 0x100
+[ ]+\*<ABI>0x0[ ]+0x00000000[ ]+NT_GNU_BUILD_ATTRIBUTE_OPEN[ ]+Applies from offset 0x100
+[ ]+\$<version>1[ ]+0x00000004[ ]+NT_GNU_BUILD_ATTRIBUTE_OPEN[ ]+Applies from offset 0x10. \(file: note2.s\)
+[ ]+!<stack prot>false[ ]+0x00000000[ ]+NT_GNU_BUILD_ATTRIBUTE_OPEN[ ]+Applies from offset 0x10.
+[ ]+\*<PIC>pic[ ]+0x00000000[ ]+NT_GNU_BUILD_ATTRIBUTE_FUNC[ ]+Applies from offset 0x10.
+#...
--- /dev/null 2017-03-03 08:02:17.248891465 +0000
+++ binutils-2.28/binutils/testsuite/binutils-all/note-2-64.d 2017-03-03 10:56:52.235794085 +0000
@@ -0,0 +1,17 @@
+#PROG: objcopy
+#readelf: --notes --wide
+#objcopy: --merge-notes
+#name: merge notes section (64-bits)
+#source: note-2-64.s
+
+#...
+ Owner Data size Description
+[ ]+\$<version>1[ ]+0x00000008[ ]+NT_GNU_BUILD_ATTRIBUTE_OPEN[ ]+Applies from offset 0x100 \(file: note1.s\)
+[ ]+\$<tool>gcc 7.0.1[ ]+0x00000000[ ]+NT_GNU_BUILD_ATTRIBUTE_OPEN[ ]+Applies from offset 0x100
+[ ]+\+<stack prot>true[ ]+0x00000000[ ]+NT_GNU_BUILD_ATTRIBUTE_OPEN[ ]+Applies from offset 0x100
+[ ]+\*<PIC>static[ ]+0x00000000[ ]+NT_GNU_BUILD_ATTRIBUTE_OPEN[ ]+Applies from offset 0x100
+[ ]+\*<ABI>0x0[ ]+0x00000000[ ]+NT_GNU_BUILD_ATTRIBUTE_OPEN[ ]+Applies from offset 0x100
+[ ]+\$<version>1[ ]+0x00000008[ ]+NT_GNU_BUILD_ATTRIBUTE_OPEN[ ]+Applies from offset 0x10. \(file: note2.s\)
+[ ]+!<stack prot>false[ ]+0x00000000[ ]+NT_GNU_BUILD_ATTRIBUTE_OPEN[ ]+Applies from offset 0x10.
+[ ]+\*<PIC>pic[ ]+0x00000000[ ]+NT_GNU_BUILD_ATTRIBUTE_FUNC[ ]+Applies from offset 0x10.
+#...
--- /dev/null 2017-03-03 08:02:17.248891465 +0000
+++ binutils-2.28/binutils/testsuite/binutils-all/note-2-64.s 2017-03-03 10:56:52.235794085 +0000
@@ -0,0 +1,94 @@
+ .text
+ .org 0x100
+ .global note1.s
+note1.s:
+ .word 0
+
+ .pushsection .gnu.build.attributes, "0x100000", %note
+ .balign 4
+ .dc.l 4
+ .dc.l 8
+ .dc.l 0x100
+ .asciz "$1"
+ .8byte note1.s
+
+ .dc.l 12
+ .dc.l 0
+ .dc.l 0x100
+ .asciz "$gcc 7.0.1"
+
+ .dc.l 2
+ .dc.l 0
+ .dc.l 0x100
+ .dc.b 0x2b, 0x2
+ .dc.b 0, 0
+
+ .dc.l 3
+ .dc.l 0
+ .dc.l 0x100
+ .dc.b 0x2a, 0x7, 0
+ .dc.b 0
+
+ .dc.l 3
+ .dc.l 0
+ .dc.l 0x100
+ .dc.b 0x2a, 0x6, 0
+ .dc.b 0
+ .popsection
+
+
+ .global note2.s
+note2.s:
+ .word 0x100
+
+ .pushsection .gnu.build.attributes, "0x100000", %note
+ .dc.l 4
+ .dc.l 8
+ .dc.l 0x100
+ .asciz "$1"
+ .8byte note2.s
+
+ .dc.l 12
+ .dc.l 0
+ .dc.l 0x100
+ .asciz "$gcc 7.0.1"
+
+ .dc.l 2
+ .dc.l 0
+ .dc.l 0x100
+ .dc.b 0x21, 0x2
+ .dc.b 0, 0
+
+ .dc.l 3
+ .dc.l 0
+ .dc.l 0x101
+ .dc.b 0x2a, 0x7, 1
+ .dc.b 0
+
+ .dc.l 3
+ .dc.l 0
+ .dc.l 0x100
+ .dc.b 0x2a, 0x6, 0
+ .dc.b 0
+ .popsection
+
+
+ .global note3.s
+note3.s:
+ .word 0x100
+
+ .pushsection .gnu.build.attributes, "0x100000", %note
+ .dc.l 4
+ .dc.l 8
+ .dc.l 0x100
+ .asciz "$1"
+ .8byte note3.s
+
+ .dc.l 12
+ .dc.l 0
+ .dc.l 0x100
+ .asciz "$gcc 7.0.1"
+
+ .popsection
+
+
Reference in New Issue Copy Permalink