Summary: GNU objcopy accepts the --wildcard flag to allow wildcard matching on symbol-related flags. (Note: it's implicitly true for section flags).
The basic syntax is to allow *, ?, \, and [] which work similarly to how they work in a shell. Additionally, starting a wildcard with ! causes that wildcard to prevent it from matching a flag.
Use an updated GlobPattern in libSupport to handle these patterns. It does not fully match the `fnmatch` used by GNU objcopy since named character classes (e.g. `[[:digit:]]`) are not supported, but this should support most existing use cases (mostly just `*` is what's used anyway).
Reviewers: jhenderson, MaskRay, evgeny777, espindola, alexshap
Reviewed By: MaskRay
Subscribers: nickdesaulniers, emaste, arichardson, hiraditya, jakehehrlich, abrachet, seiya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66613
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375169 91177308-0d34-0410-b5e6-96231b3b80d8
David added the JamCRC implementation in r246590. More recently, Eugene
added a CRC-32 implementation in r357901, which falls back to zlib's
crc32 function if present.
These checksums are essentially the same, so having multiple
implementations seems unnecessary. This replaces the CRC-32
implementation with the simpler one from JamCRC, and implements the
JamCRC interface in terms of CRC-32 since this means it can use zlib's
implementation when available, saving a few bytes and potentially making
it faster.
JamCRC took an ArrayRef<char> argument, and CRC-32 took a StringRef.
This patch changes it to ArrayRef<uint8_t> which I think is the best
choice, and simplifies a few of the callers nicely.
Differential revision: https://reviews.llvm.org/D68570
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@374148 91177308-0d34-0410-b5e6-96231b3b80d8
Fixes PR43181. This option was recently added to GNU objcopy (binutils
PR24942).
`llvm-objcopy -I binary -O elf64-x86-64 --set-section-alignment .data=8` can set the alignment of .data.
Reviewed By: grimar, jhenderson, rupprecht
Differential Revision: https://reviews.llvm.org/D67656
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@373461 91177308-0d34-0410-b5e6-96231b3b80d8
GNU objcopy documents that -B is only useful with architecture-less
input (i.e. "binary" or "ihex"). After D67144, -O defaults to -I, and
-B is essentially a NOP.
* If -O is binary/ihex, GNU objcopy ignores -B.
* If -O is elf*, -B provides the e_machine field in GNU objcopy.
So to convert a blob to an ELF, `-I binary -B i386:x86-64 -O elf64-x86-64` has to be specified.
`-I binary -B i386:x86-64 -O elf64-x86-64` creates an ELF with its
e_machine field set to EM_NONE in GNU objcopy, but a regular x86_64 ELF
in elftoolchain elfcopy. Follow the elftoolchain approach (ignoring -B)
to simplify code. Users that expect their command line portable should
specify -B.
Reviewed By: jhenderson
Differential Revision: https://reviews.llvm.org/D67215
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@371914 91177308-0d34-0410-b5e6-96231b3b80d8
Fixes PR42171.
In GNU objcopy, if -O (--output-target) is not specified, the value is
copied from -I (--input-target).
```
objcopy -I binary -B i386:x86-64 a.txt b # b is copied from a.txt
llvm-objcopy -I binary -B i386:x86-64 a.txt b # b is an x86-64 object file
```
This patch changes our behavior to match GNU. With this change, we can
delete code related to -B handling (D67215).
Reviewed By: jakehehrlich
Differential Revision: https://reviews.llvm.org/D67144
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@371913 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
The matchers for section/symbol related flags (e.g. `--keep-symbol=Name` or `--regex --keep-symbol=foo.*`) are currently just vectors that are matched linearlly. However, adding wildcard support would require negative matching too, e.g. a symbol should be removed if it matches a wildcard *but* doesn't match some other wildcard.
To make the next patch simpler, consolidate matching logic to a class defined in CopyConfig that takes care of matching.
Reviewers: jhenderson, seiya, MaskRay, espindola, alexshap
Reviewed By: jhenderson, MaskRay
Subscribers: emaste, arichardson, jakehehrlich, abrachet, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66432
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@369689 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Use an enum instead of string to hold the output file format in Config.InputFormat and Config.OutputFormat. It's essential to support other output file formats other than ELF.
This patch originally has been submitted as D63239. However, there was an use-of-uninitialized-value bug and reverted in r364379 (git commit 4ee933c).
This patch includes the fix for the bug by setting Config.InputFormat/Config.OutputFormat in parseStripOptions.
Reviewers: espindola, alexshap, rupprecht, jhenderson
Reviewed By: jhenderson
Subscribers: emaste, arichardson, jakehehrlich, MaskRay, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D64170
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@365173 91177308-0d34-0410-b5e6-96231b3b80d8
This reverts r364254 (git commit 545f001d1b9a7b58a68d75e70bfc36c841de8999)
This change causes some llvm-obcopy tests to fail with valgrind.
Following is the output for basic-keep.test
Command Output (stderr):
--
==107406== Conditional jump or move depends on uninitialised value(s)
==107406== at 0x1A30DD: executeObjcopy(llvm::objcopy::CopyConfig const&) (llvm-objcopy.cpp:235)
==107406== by 0x1A3935: main (llvm-objcopy.cpp:294)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@364379 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Use an enum instead of string to hold the output file format in Config.InputFormat and Config.OutputFormat. It's essential to support other output file formats other than ELF.
Reviewers: espindola, alexshap, rupprecht, jhenderson
Reviewed By: rupprecht, jhenderson
Subscribers: jyknight, compnerd, emaste, arichardson, fedor.sergeev, jakehehrlich, MaskRay, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D63239
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@364254 91177308-0d34-0410-b5e6-96231b3b80d8
Summary: Implements bug [[ https://bugs.llvm.org/show_bug.cgi?id=42204 | 42204 ]]. llvm-strip now warns when the same input file is used more than once, and errors when stdin is used more than once.
Reviewers: jhenderson, rupprecht, espindola, alexshap
Reviewed By: jhenderson, rupprecht
Subscribers: emaste, arichardson, jakehehrlich, MaskRay, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D63122
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@363638 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
The "sparc"/"sparcel" architectures appears in ArchMap (used by -B option) but not in OutputFormatMap (used by -I/-O option). Add their targets into OutputFormatMap for consistency.
Note that AFAIK there're no targets for 32-bit little-endian SPARC ("elf32-sparcel") in GNU binutils.
Reviewers: espindola, alexshap, rupprecht, jhenderson, compnerd, jakehehrlich
Reviewed By: jhenderson, compnerd, jakehehrlich
Subscribers: jyknight, emaste, arichardson, fedor.sergeev, jakehehrlich, MaskRay, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D63238
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@363524 91177308-0d34-0410-b5e6-96231b3b80d8
Summary: Tidied up errors during command line parsing to be more consistent with the rest of llvm-objcopy errors.
Reviewers: jhenderson, rupprecht, espindola, alexshap
Reviewed By: jhenderson, rupprecht
Subscribers: emaste, arichardson, MaskRay, llvm-commits, jakehehrlich
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D62973
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@363350 91177308-0d34-0410-b5e6-96231b3b80d8
Summary: AFAIK, the "sparc" target is big endian and the target for 32-bit little-endian SPARC is denoted as "sparcel". This patch fixes the endianness of "sparc" target and adds "sparcel" target for 32-bit little-endian SPARC.
Reviewers: espindola, alexshap, rupprecht, jhenderson
Reviewed By: jhenderson
Subscribers: jyknight, emaste, arichardson, fedor.sergeev, jakehehrlich, MaskRay, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D63251
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@363336 91177308-0d34-0410-b5e6-96231b3b80d8
This implements the functionality described in
https://lld.llvm.org/Partitions.html. It works as follows:
- Reads the section headers using the ELF header at file offset 0;
- If extracting a loadable partition:
- Finds the section containing the required partition ELF header by looking it up in the section table;
- Reads the ELF and program headers from the section.
- If extracting the main partition:
- Reads the ELF and program headers from file offset 0.
- Filters the section table according to which sections are in the program headers that it read:
- If ParentSegment != nullptr or section is not SHF_ALLOC, then it goes in.
- Sections containing partition ELF headers or program headers are excluded as there are no headers for these in ordinary ELF files.
Differential Revision: https://reviews.llvm.org/D62364
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@362818 91177308-0d34-0410-b5e6-96231b3b80d8
.gnu_debuglink section contains information regarding file with
debugging symbols, identified by its CRC32. This target file is not
intended to ever change or it would invalidate the stored checksum, yet
the checksum is calculated over and over again for each of the objects
inside the archive, usually hundreds of times.
This patch precomputes the CRC32 of the target once and then reuses the
value where required, saving lots of redundant I/O.
The error message reported should stay the same, although now it might
be reported earlier.
Reviewed by: jhenderson, jakehehrlich, MaskRay
Differential Revision: https://reviews.llvm.org/D61343
Patch by Michal Janiszewski
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@360661 91177308-0d34-0410-b5e6-96231b3b80d8
If certain switches are not specified, llvm-strip behaves as if
--strip-all were specified. This means that for testing, when we don't
want the stripping behaviour, we have to specify one of these switches,
which can be confusing. This change adds --no-strip-all to allow an
alternative way of suppressing the default stripping, in a less
confusing manner.
Reviewed by: jakehehrlich, MaskRay
Differential Revision: https://reviews.llvm.org/D61377
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@359781 91177308-0d34-0410-b5e6-96231b3b80d8
llvm-objcopy currently emits an error if a section to be removed is
referenced by another section. This is a reasonable thing to do, but is
different to GNU objcopy. We should allow users who know what they are
doing to have a way to produce the invalid ELF. This change adds a new
switch --allow-broken-links to both llvm-strip and llvm-objcopy to do
precisely that. The corresponding sh_link field is then set to 0 instead
of an error being emitted.
I cannot use llvm-readelf/readobj to test the link fields because they
emit an error if any sections, like the .dynsym, cannot be properly
loaded.
Reviewed by: rupprecht, grimar
Differential Revision: https://reviews.llvm.org/D60324
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358649 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This change takes the full list of bfd targets that lld supports (see `ScriptParser.cpp`), including generic handling for `*-freebsd` targets (which uses the same settings but with a FreeBSD OSABI). In particular this adds mips support for `--output-target` (but not yet via `--binary-architecture`).
lld and llvm-objcopy use their own different custom data structures, so I'd prefer to check this in as-is (add support directly in llvm-objcopy, including all the test coverage) and do a separate NFC patch(s) that consolidate the two by putting this mapping into libobject.
See [[ https://bugs.llvm.org/show_bug.cgi?id=41462 | PR41462 ]].
Reviewers: jhenderson, jakehehrlich, espindola, alexshap, arichardson
Reviewed By: arichardson
Subscribers: fedor.sergeev, emaste, sdardis, krytarowski, atanasyan, llvm-commits, MaskRay, arichardson
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D60773
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358562 91177308-0d34-0410-b5e6-96231b3b80d8
GNU objcopy can support output formats like elf32-i386-freebsd and
elf64-x86-64-freebsd. The only difference from their regular non-freebsd
counterparts that I have observed is that the freebsd versions set the
OS/ABI field to ELFOSABI_FREEBSD. This patch sets the OS/ABI field
according based on the format whenever --output-format is specified.
Reviewed by: rupprecht, grimar
Differential Revision: https://reviews.llvm.org/D59645
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@356737 91177308-0d34-0410-b5e6-96231b3b80d8
For ELF, we accept but ignore --only-keep-debug. Do the same for llvm-strip.
COFF does implement this, so update the test that it is supported.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@356207 91177308-0d34-0410-b5e6-96231b3b80d8
error() was previously cleaned up from CopyConfig, but new uses were introduced.
This also tweaks the error message for --add-symbol to report all invalid flags.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@356105 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This removes calls to `error()`/`reportError()` in the main driver (llvm-objcopy.cpp) as well as the associated argv-parsing (CopyConfig.cpp). `logAllUnhandledErrors()` is now the main way to print errors.
There are still a few uses from within the per-arch drivers, so we can't delete them yet... but almost!
Reviewers: jhenderson, alexshap, espindola
Reviewed By: jhenderson
Subscribers: emaste, arichardson, jakehehrlich, jdoerfert, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D58316
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354600 91177308-0d34-0410-b5e6-96231b3b80d8
Summary: Use StringSaver/BumpPtrAlloc when parsing lines from --keep-global-symbols files. This allows us to consistently use StringRef for driver options, which avoids copying the full strings for each object copied, as well as simplifies part of D57517.
Reviewers: jhenderson, evgeny777, alexshap
Subscribers: jakehehrlich
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D57617
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353068 91177308-0d34-0410-b5e6-96231b3b80d8
