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Author SHA1 Message Date
Daniel Rodríguez Troitiño
652713e268 [MachO][ObjCopy] Handle exports trie in LC_DYLD_INFO and LC_DYLD_EXPORTS_TRIE 
The exports trie used to be pointed by the information in LC_DYLD_INFO,
but when chained fixups are present, the exports trie is pointed by
LC_DYLD_EXPORTS_TRIE instead.

Modify ObjCopy code to calculate the right offset and size needed
depending on the existence of LC_DYLD_INFO or LC_DYLD_EXPORTS_TRIE, read
the exports from either of those places, and write the export
information as pointed to either of those places.

Depends on D134571.

Reviewed By: alexander-shaposhnikov

Differential Revision: https://reviews.llvm.org/D137879
 2022-11-22 18:50:06 -08:00
Daniel Rodríguez Troitiño
dd2165ef88 [objcopy] Fix order of Mach-O LINKEDIT pieces during layout 
The exports trie and the chained fixups where in the opposite order, and
function starts happenned before them, instead of after them.

Restore the correct order and rewrite the code to make it easier to move
around in the future if needed by reusing the `Offset` variable and
keeping both the `StartOf...` and the size of each piece together.

This was found out while trying to use the system strip in a binary
already stripped by LLVM and receiving errors around chained fixups when
we enabled those in the linker.

Reviewed By: alexander-shaposhnikov

Differential Revision: https://reviews.llvm.org/D133974
 2022-11-11 12:05:57 -08:00
Keith Smiley
c2d209476c
[llvm-objcopy][MachO] Add support for LC_DYLIB_CODE_SIGN_DRS 
This allows binaries containing the LC_DYLIB_CODE_SIGN_DRS to be
objcopy'd and stripped.

Differential Revision: https://reviews.llvm.org/D135988
 2022-10-14 15:41:19 -07:00
Alexey Lapshin
f75da0c8e6 [llvm-objcopy][NFC] Move core implementation of llvm-objcopy into separate library. 
This patch moves core implementation of llvm-objcopy into Object library
(http://lists.llvm.org/pipermail/llvm-dev/2020-September/145075.html).
The functionality for parsing input options is left inside tools/llvm-objcopy.
The interface of ObjCopy library:

ObjCopy/ELF/ELFObjcopy.h

```
Error executeObjcopyOnIHex(const CopyConfig &Config, MemoryBuffer &In,
                           Buffer &Out);
Error executeObjcopyOnRawBinary(const CopyConfig &Config, MemoryBuffer &In,
                                Buffer &Out);
Error executeObjcopyOnBinary(const CopyConfig &Config,
                             object::ELFObjectFileBase &In, Buffer &Out);

```
ObjCopy/COFF/COFFObjcopy.h

```
Error executeObjcopyOnBinary(const CopyConfig &Config,
                             object::COFFObjectFile &In, Buffer &Out);

```
ObjCopy/MachO/MachOObjcopy.h

```
Error executeObjcopyOnBinary(const CopyConfig &Config,
                             object::MachOObjectFile &In, Buffer &Out);

```
ObjCopy/wasm/WasmObjcopy.h

```
Error executeObjcopyOnBinary(const CopyConfig &Config,
                             object::WasmObjectFile &In, Buffer &Out);

```

Differential Revision: https://reviews.llvm.org/D88827
 2022-02-17 13:11:42 +03:00