elfedit: Add --enable-x86-feature/--disable-x86-feature
Add --enable-x86-feature and --disable-x86-feature options to elfedit to set and clear the IBT and SHSTK bits in program property in ELF executables and shared objects. binutils/ * doc/binutils.texi: Document --enable-x86-feature and --disable-x86-feature options for elfedit. * elfedit.c: Include "config.h" and <sys/mman.h>. (enable_x86_features): New. (disable_x86_features): Likewise. (update_gnu_property): Likewise. (elf_x86_feature): Likewise. (process_file): Call update_gnu_property on ET_EXEC or ET_DYN file. (command_line_switch): Add OPTION_ENABLE_X86_FEATURE and OPTION_DISABLE_X86_FEATURE. (options): Add--enable-x86-feature and --disable-x86-feature. (usage): Likewise. (main): Handle OPTION_ENABLE_X86_FEATURE and OPTION_DISABLE_X86_FEATURE. ld/ * testsuite/config/default.exp (ELFEDIT): New. * testsuite/ld-elf/linux-x86.exp (elfedit_test): New proc. Run elfedit tests. * testsuite/ld-elf/x86-feature-1a.rd: New file. * testsuite/ld-elf/x86-feature-1b.rd: Likewise. * testsuite/ld-elf/x86-feature-1c.rd: Likewise. * testsuite/ld-elf/x86-feature-1d.rd: Likewise. * testsuite/ld-elf/x86-feature-1e.rd: Likewise.
This commit is contained in:
H.J. Lu
parent
ddea148b3d
commit
8a6b075bc0
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@ -1,3 +1,21 @@
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2018-11-06 H.J. Lu <hongjiu.lu@intel.com>
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* doc/binutils.texi: Document --enable-x86-feature and
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--disable-x86-feature options for elfedit.
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* elfedit.c: Include "config.h" and <sys/mman.h>.
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(enable_x86_features): New.
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(disable_x86_features): Likewise.
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(update_gnu_property): Likewise.
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(elf_x86_feature): Likewise.
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(process_file): Call update_gnu_property on ET_EXEC or ET_DYN
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file.
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(command_line_switch): Add OPTION_ENABLE_X86_FEATURE and
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OPTION_DISABLE_X86_FEATURE.
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(options): Add--enable-x86-feature and --disable-x86-feature.
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(usage): Likewise.
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(main): Handle OPTION_ENABLE_X86_FEATURE and
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OPTION_DISABLE_X86_FEATURE.
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2018-11-03 H.J. Lu <hongjiu.lu@intel.com>
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* elfedit.c (update_elf_header): Move EI_MAG? check to ...
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@ -42,7 +42,7 @@ section entitled ``GNU Free Documentation License''.
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* size: (binutils)size. List section sizes and total size.
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* strings: (binutils)strings. List printable strings from files.
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* strip: (binutils)strip. Discard symbols.
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* elfedit: (binutils)elfedit. Update the ELF header of ELF files.
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* elfedit: (binutils)elfedit. Update ELF header and property of ELF files.
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* windmc: (binutils)windmc. Generator for Windows message resources.
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* windres: (binutils)windres. Manipulate Windows resources.
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@end direntry
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@ -111,7 +111,7 @@ List printable strings from files
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Discard symbols
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@item elfedit
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Update the ELF header of ELF files.
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Update the ELF header and program property of ELF files.
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@item c++filt
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Demangle encoded C++ symbols (on MS-DOS, this program is named
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@ -151,7 +151,7 @@ in the section entitled ``GNU Free Documentation License''.
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* windres:: Manipulate Windows resources
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* dlltool:: Create files needed to build and use DLLs
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* readelf:: Display the contents of ELF format files
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* elfedit:: Update the ELF header of ELF files
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* elfedit:: Update ELF header and property of ELF files
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* Common Options:: Command-line options for all utilities
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* Selecting the Target System:: How these utilities determine the target
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* Reporting Bugs:: Reporting Bugs
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@ -4725,7 +4725,7 @@ objdump(1), and the Info entries for @file{binutils}.
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@cindex Update ELF header
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@kindex elfedit
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@c man title elfedit Update the ELF header of ELF files.
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@c man title elfedit Update ELF header and program property of ELF files.
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@smallexample
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@c man begin SYNOPSIS elfedit
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@ -4735,6 +4735,8 @@ elfedit [@option{--input-mach=}@var{machine}]
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@option{--output-mach=}@var{machine}
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@option{--output-type=}@var{type}
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@option{--output-osabi=}@var{osabi}
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@option{--enable-x86-feature=}@var{feature}
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@option{--disable-x86-feature=}@var{feature}
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[@option{-v}|@option{--version}]
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[@option{-h}|@option{--help}]
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@var{elffile}@dots{}
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@ -4743,9 +4745,10 @@ elfedit [@option{--input-mach=}@var{machine}]
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@c man begin DESCRIPTION elfedit
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@command{elfedit} updates the ELF header of ELF files which have
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the matching ELF machine and file types. The options control how and
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which fields in the ELF header should be updated.
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@command{elfedit} updates the ELF header and program property of ELF
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files which have the matching ELF machine and file types. The options
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control how and which fields in the ELF header and program property
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should be updated.
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@var{elffile}@dots{} are the ELF files to be updated. 32-bit and
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64-bit ELF files are supported, as are archives containing ELF files.
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@ -4755,7 +4758,9 @@ which fields in the ELF header should be updated.
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The long and short forms of options, shown here as alternatives, are
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equivalent. At least one of the @option{--output-mach},
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@option{--output-type} and @option{--output-osabi} options must be given.
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@option{--output-type}, @option{--output-osabi},
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@option{--enable-x86-feature} and @option{--disable-x86-feature}
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options must be given.
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@table @env
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@ -4795,6 +4800,19 @@ The supported ELF OSABIs are, @var{none}, @var{HPUX}, @var{NetBSD},
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Change the ELF OSABI in the ELF header to @var{osabi}. The
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supported ELF OSABI are the same as @option{--input-osabi}.
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@item --enable-x86-feature=@var{feature}
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Set the @var{feature} bit in program property in @var{exec} or @var{dyn}
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ELF files with machine types of @var{i386} or @var{x86-64}. The
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supported features are, @var{ibt} and @var{shstk}.
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@item --disable-x86-feature=@var{feature}
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Clear the @var{feature} bit in program property in @var{exec} or
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@var{dyn} ELF files with machine types of @var{i386} or @var{x86-64}.
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The supported features are the same as @option{--enable-x86-feature}.
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Note: @option{--enable-x86-feature} and @option{--disable-x86-feature}
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are available only on hosts with @samp{mmap} support.
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@item -v
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@itemx --version
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Display the version number of @command{elfedit}.
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@ -18,6 +18,7 @@
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "config.h"
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#include "sysdep.h"
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#include <assert.h>
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@ -65,6 +66,217 @@ enum elfclass
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static enum elfclass input_elf_class = ELF_CLASS_UNKNOWN;
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static enum elfclass output_elf_class = ELF_CLASS_BOTH;
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#ifdef HAVE_MMAP
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#include <sys/mman.h>
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static unsigned int enable_x86_features;
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static unsigned int disable_x86_features;
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static int
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update_gnu_property (const char *file_name, FILE *file)
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{
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char *map;
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Elf_Internal_Phdr *phdrs;
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struct stat st_buf;
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unsigned int i;
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int ret;
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if (!enable_x86_features && !disable_x86_features)
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return 0;
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if (elf_header.e_machine != EM_386
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&& elf_header.e_machine != EM_X86_64)
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{
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error (_("%s: Not an i386 nor x86-64 ELF file\n"), file_name);
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return 0;
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}
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if (fstat (fileno (file), &st_buf) < 0)
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{
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error (_("%s: stat () failed\n"), file_name);
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return 1;
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}
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map = mmap (NULL, st_buf.st_size, PROT_READ | PROT_WRITE,
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MAP_SHARED, fileno (file), 0);
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if (map == MAP_FAILED)
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{
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error (_("%s: mmap () failed\n"), file_name);
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return 0;
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}
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phdrs = xmalloc (elf_header.e_phnum * sizeof (*phdrs));
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if (elf_header.e_ident[EI_CLASS] == ELFCLASS32)
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{
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Elf32_External_Phdr *phdrs32
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= (Elf32_External_Phdr *) (map + elf_header.e_phoff);
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for (i = 0; i < elf_header.e_phnum; i++)
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{
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phdrs[i].p_type = BYTE_GET (phdrs32[i].p_type);
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phdrs[i].p_offset = BYTE_GET (phdrs32[i].p_offset);
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phdrs[i].p_vaddr = BYTE_GET (phdrs32[i].p_vaddr);
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phdrs[i].p_paddr = BYTE_GET (phdrs32[i].p_paddr);
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phdrs[i].p_filesz = BYTE_GET (phdrs32[i].p_filesz);
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phdrs[i].p_memsz = BYTE_GET (phdrs32[i].p_memsz);
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phdrs[i].p_flags = BYTE_GET (phdrs32[i].p_flags);
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phdrs[i].p_align = BYTE_GET (phdrs32[i].p_align);
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}
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}
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else
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{
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Elf64_External_Phdr *phdrs64
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= (Elf64_External_Phdr *) (map + elf_header.e_phoff);
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for (i = 0; i < elf_header.e_phnum; i++)
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{
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phdrs[i].p_type = BYTE_GET (phdrs64[i].p_type);
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phdrs[i].p_offset = BYTE_GET (phdrs64[i].p_offset);
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phdrs[i].p_vaddr = BYTE_GET (phdrs64[i].p_vaddr);
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phdrs[i].p_paddr = BYTE_GET (phdrs64[i].p_paddr);
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phdrs[i].p_filesz = BYTE_GET (phdrs64[i].p_filesz);
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phdrs[i].p_memsz = BYTE_GET (phdrs64[i].p_memsz);
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phdrs[i].p_flags = BYTE_GET (phdrs64[i].p_flags);
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phdrs[i].p_align = BYTE_GET (phdrs64[i].p_align);
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}
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}
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ret = 0;
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for (i = 0; i < elf_header.e_phnum; i++)
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if (phdrs[i].p_type == PT_NOTE)
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{
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size_t offset = phdrs[i].p_offset;
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size_t size = phdrs[i].p_filesz;
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size_t align = phdrs[i].p_align;
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char *buf = map + offset;
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char *p = buf;
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while (p < buf + size)
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{
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Elf_External_Note *xnp = (Elf_External_Note *) p;
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Elf_Internal_Note in;
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if (offsetof (Elf_External_Note, name) > buf - p + size)
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{
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ret = 1;
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goto out;
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}
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in.type = BYTE_GET (xnp->type);
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in.namesz = BYTE_GET (xnp->namesz);
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in.namedata = xnp->name;
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if (in.namesz > buf - in.namedata + size)
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{
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ret = 1;
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goto out;
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}
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in.descsz = BYTE_GET (xnp->descsz);
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in.descdata = p + ELF_NOTE_DESC_OFFSET (in.namesz, align);
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in.descpos = offset + (in.descdata - buf);
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if (in.descsz != 0
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&& (in.descdata >= buf + size
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|| in.descsz > buf - in.descdata + size))
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{
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ret = 1;
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goto out;
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}
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if (in.namesz == sizeof "GNU"
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&& strcmp (in.namedata, "GNU") == 0
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&& in.type == NT_GNU_PROPERTY_TYPE_0)
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{
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unsigned char *ptr;
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unsigned char *ptr_end;
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if (in.descsz < 8 || (in.descsz % align) != 0)
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{
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ret = 1;
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goto out;
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}
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ptr = (unsigned char *) in.descdata;
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ptr_end = ptr + in.descsz;
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do
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{
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unsigned int type = byte_get (ptr, 4);
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unsigned int datasz = byte_get (ptr + 4, 4);
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unsigned int bitmask, old_bitmask;
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ptr += 8;
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if ((ptr + datasz) > ptr_end)
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{
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ret = 1;
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goto out;
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}
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if (type == GNU_PROPERTY_X86_FEATURE_1_AND)
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{
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if (datasz != 4)
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{
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ret = 1;
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goto out;
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}
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old_bitmask = byte_get (ptr, 4);
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bitmask = old_bitmask;
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if (enable_x86_features)
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bitmask |= enable_x86_features;
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if (disable_x86_features)
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bitmask &= ~disable_x86_features;
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if (old_bitmask != bitmask)
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BYTE_PUT (ptr, bitmask);
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goto out;
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}
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ptr += ELF_ALIGN_UP (datasz, align);
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}
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while ((ptr_end - ptr) >= 8);
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}
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p += ELF_NOTE_NEXT_OFFSET (in.namesz, in.descsz, align);
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}
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}
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out:
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if (ret != 0)
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error (_("%s: Invalid PT_NOTE segment\n"), file_name);
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free (phdrs);
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munmap (map, st_buf.st_size);
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return ret;
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}
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/* Set enable_x86_features and disable_x86_features for a feature
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string, FEATURE. */
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static int
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elf_x86_feature (const char *feature, int enable)
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{
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unsigned int x86_feature;
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if (strcasecmp (feature, "ibt") == 0)
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x86_feature = GNU_PROPERTY_X86_FEATURE_1_IBT;
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else if (strcasecmp (feature, "shstk") == 0)
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x86_feature = GNU_PROPERTY_X86_FEATURE_1_SHSTK;
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else
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return -1;
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if (enable)
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{
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enable_x86_features |= x86_feature;
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disable_x86_features &= ~x86_feature;
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}
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else
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{
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disable_x86_features |= x86_feature;
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enable_x86_features &= ~x86_feature;
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}
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return 0;
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}
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#endif
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/* Return ELF class for a machine type, MACH. */
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static enum elfclass
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@ -533,6 +745,12 @@ process_file (const char *file_name)
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rewind (file);
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archive_file_size = archive_file_offset = 0;
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ret = process_object (file_name, file);
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#ifdef HAVE_MMAP
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if (!ret
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&& (elf_header.e_type == ET_EXEC
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|| elf_header.e_type == ET_DYN))
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ret = update_gnu_property (file_name, file);
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#endif
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}
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fclose (file);
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@ -632,7 +850,11 @@ enum command_line_switch
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OPTION_INPUT_TYPE,
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OPTION_OUTPUT_TYPE,
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OPTION_INPUT_OSABI,
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OPTION_OUTPUT_OSABI
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OPTION_OUTPUT_OSABI,
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#ifdef HAVE_MMAP
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OPTION_ENABLE_X86_FEATURE,
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OPTION_DISABLE_X86_FEATURE,
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#endif
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};
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static struct option options[] =
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@ -643,6 +865,12 @@ static struct option options[] =
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{"output-type", required_argument, 0, OPTION_OUTPUT_TYPE},
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{"input-osabi", required_argument, 0, OPTION_INPUT_OSABI},
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{"output-osabi", required_argument, 0, OPTION_OUTPUT_OSABI},
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#ifdef HAVE_MMAP
|
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{"enable-x86-feature",
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required_argument, 0, OPTION_ENABLE_X86_FEATURE},
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{"disable-x86-feature",
|
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required_argument, 0, OPTION_DISABLE_X86_FEATURE},
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#endif
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{"version", no_argument, 0, 'v'},
|
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{"help", no_argument, 0, 'h'},
|
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{0, no_argument, 0, 0}
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@ -661,7 +889,15 @@ usage (FILE *stream, int exit_status)
|
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--input-type <type> Set input file type to <type>\n\
|
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--output-type <type> Set output file type to <type>\n\
|
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--input-osabi <osabi> Set input OSABI to <osabi>\n\
|
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--output-osabi <osabi> Set output OSABI to <osabi>\n\
|
||||
--output-osabi <osabi> Set output OSABI to <osabi>\n"));
|
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#ifdef HAVE_MMAP
|
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fprintf (stream, _("\
|
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--enable-x86-feature <feature>\n\
|
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Enable x86 feature <feature>\n\
|
||||
--disable-x86-feature <feature>\n\
|
||||
Disable x86 feature <feature>\n"));
|
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#endif
|
||||
fprintf (stream, _("\
|
||||
-h --help Display this information\n\
|
||||
-v --version Display the version number of %s\n\
|
||||
"),
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||||
|
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@ -734,6 +970,18 @@ main (int argc, char ** argv)
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|||
return 1;
|
||||
break;
|
||||
|
||||
#ifdef HAVE_MMAP
|
||||
case OPTION_ENABLE_X86_FEATURE:
|
||||
if (elf_x86_feature (optarg, 1) < 0)
|
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return 1;
|
||||
break;
|
||||
|
||||
case OPTION_DISABLE_X86_FEATURE:
|
||||
if (elf_x86_feature (optarg, 0) < 0)
|
||||
return 1;
|
||||
break;
|
||||
#endif
|
||||
|
||||
case 'h':
|
||||
usage (stdout, 0);
|
||||
|
||||
|
|
@ -748,6 +996,10 @@ main (int argc, char ** argv)
|
|||
|
||||
if (optind == argc
|
||||
|| (output_elf_machine == -1
|
||||
#ifdef HAVE_MMAP
|
||||
&& ! enable_x86_features
|
||||
&& ! disable_x86_features
|
||||
#endif
|
||||
&& output_elf_type == -1
|
||||
&& output_elf_osabi == -1))
|
||||
usage (stderr, 1);
|
||||
|
|
|
|||
11
ld/ChangeLog
11
ld/ChangeLog
|
|
@ -1,3 +1,14 @@
|
|||
2018-11-06 H.J. Lu <hongjiu.lu@intel.com>
|
||||
|
||||
* testsuite/config/default.exp (ELFEDIT): New.
|
||||
* testsuite/ld-elf/linux-x86.exp (elfedit_test): New proc.
|
||||
Run elfedit tests.
|
||||
* testsuite/ld-elf/x86-feature-1a.rd: New file.
|
||||
* testsuite/ld-elf/x86-feature-1b.rd: Likewise.
|
||||
* testsuite/ld-elf/x86-feature-1c.rd: Likewise.
|
||||
* testsuite/ld-elf/x86-feature-1d.rd: Likewise.
|
||||
* testsuite/ld-elf/x86-feature-1e.rd: Likewise.
|
||||
|
||||
2018-11-05 H.J. Lu <hongjiu.lu@intel.com>
|
||||
|
||||
PR gas/23854
|
||||
|
|
|
|||
|
|
@ -243,6 +243,10 @@ if ![info exists READELFFLAGS] then {
|
|||
set READELFFLAGS {}
|
||||
}
|
||||
|
||||
if ![info exists ELFEDIT] then {
|
||||
set ELFEDIT [findfile $base_dir/../binutils/elfedit]
|
||||
}
|
||||
|
||||
if ![info exists LD] then {
|
||||
set LD [findfile $base_dir/ld-new ./ld-new [transform ld]]
|
||||
}
|
||||
|
|
|
|||
|
|
@ -44,3 +44,49 @@ run_ld_link_exec_tests [list \
|
|||
"asm" \
|
||||
] \
|
||||
]
|
||||
|
||||
run_ld_link_tests [list \
|
||||
[list \
|
||||
"Build x86-feature-1" \
|
||||
"-z separate-code -z shstk" \
|
||||
"" \
|
||||
"-mx86-used-note=yes" \
|
||||
{ start.s } \
|
||||
{{readelf -n x86-feature-1a.rd}} \
|
||||
"x86-feature-1" \
|
||||
] \
|
||||
]
|
||||
|
||||
proc elfedit_test { options test output } {
|
||||
global ELFEDIT
|
||||
global READELF
|
||||
global srcdir
|
||||
global subdir
|
||||
|
||||
set test_name "elfedit $options"
|
||||
send_log "$ELFEDIT $options tmpdir/$test\n"
|
||||
set got [remote_exec host "$ELFEDIT $options tmpdir/$test" "" "/dev/null"]
|
||||
if { [lindex $got 0] != 0 || ![string match "" [lindex $got 1]] } then {
|
||||
send_log "$got\n"
|
||||
unresolved "$test_name"
|
||||
}
|
||||
send_log "$READELF -n $options tmpdir/$test > tmpdir/$output.out\n"
|
||||
set got [remote_exec host "$READELF -n tmpdir/$test" "" "/dev/null" "tmpdir/$output.out"]
|
||||
if { [lindex $got 0] != 0 || ![string match "" [lindex $got 1]] } then {
|
||||
send_log "$got\n"
|
||||
unresolved "$test_name"
|
||||
}
|
||||
if { [regexp_diff tmpdir/$output.out $srcdir/$subdir/$output.rd] } then {
|
||||
fail "$test_name"
|
||||
} else {
|
||||
pass "$test_name"
|
||||
}
|
||||
}
|
||||
|
||||
elfedit_test "--enable-x86-feature ibt --disable-x86-feature shstk" \
|
||||
x86-feature-1 x86-feature-1b
|
||||
elfedit_test "--enable-x86-feature ibt" x86-feature-1 x86-feature-1b
|
||||
elfedit_test "--disable-x86-feature shstk" x86-feature-1 x86-feature-1c
|
||||
elfedit_test "--disable-x86-feature ibt" x86-feature-1 x86-feature-1d
|
||||
elfedit_test "--enable-x86-feature ibt --enable-x86-feature shstk" \
|
||||
x86-feature-1 x86-feature-1e
|
||||
|
|
|
|||
|
|
@ -0,0 +1,6 @@
|
|||
Displaying notes found in: .note.gnu.property
|
||||
Owner Data size Description
|
||||
GNU 0x[0-9a-f]+ NT_GNU_PROPERTY_TYPE_0
|
||||
Properties: x86 feature: SHSTK
|
||||
x86 ISA used: <None>
|
||||
x86 feature used: x86
|
||||
|
|
@ -0,0 +1,6 @@
|
|||
Displaying notes found in: .note.gnu.property
|
||||
Owner Data size Description
|
||||
GNU 0x[0-9a-f]+ NT_GNU_PROPERTY_TYPE_0
|
||||
Properties: x86 feature: IBT
|
||||
x86 ISA used: <None>
|
||||
x86 feature used: x86
|
||||
|
|
@ -0,0 +1,6 @@
|
|||
Displaying notes found in: .note.gnu.property
|
||||
Owner Data size Description
|
||||
GNU 0x[0-9a-f]+ NT_GNU_PROPERTY_TYPE_0
|
||||
Properties: x86 feature: IBT
|
||||
x86 ISA used: <None>
|
||||
x86 feature used: x86
|
||||
|
|
@ -0,0 +1,6 @@
|
|||
Displaying notes found in: .note.gnu.property
|
||||
Owner Data size Description
|
||||
GNU 0x[0-9a-f]+ NT_GNU_PROPERTY_TYPE_0
|
||||
Properties: x86 feature: <None>
|
||||
x86 ISA used: <None>
|
||||
x86 feature used: x86
|
||||
|
|
@ -0,0 +1,6 @@
|
|||
Displaying notes found in: .note.gnu.property
|
||||
Owner Data size Description
|
||||
GNU 0x[0-9a-f]+ NT_GNU_PROPERTY_TYPE_0
|
||||
Properties: x86 feature: IBT, SHSTK
|
||||
x86 ISA used: <None>
|
||||
x86 feature used: x86
|
||||
Loading…
Reference in New Issue