[llvm-objcopy] Remove getDecompressedSizeAndAlignment. NFC

[llvm-objcopy] --compress-debug-sections: fix uninitialized ch_reserved for Elf64_Chdr

ch_reserved is uninitialized and the output is not deterministic. Fix it.
Rewrite and improve compress-debug-se

[llvm-objcopy] --compress-debug-sections: fix uninitialized ch_reserved for Elf64_Chdr

ch_reserved is uninitialized and the output is not deterministic. Fix it.
Rewrite and improve compress-debug-sections-zlib.test.

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[llvm-objcopy] Remove remnant .zdebug code

[MC] Delete dead zlib-gnu code and simplify writeSectionData

[Support] Change compression::zlib::{compress,uncompress} to use uint8_t *

It's more natural to use uint8_t * (std::byte needs C++17 and llvm has
too much uint8_t *) and most callers use uint8_t * i

[Support] Change compression::zlib::{compress,uncompress} to use uint8_t *

It's more natural to use uint8_t * (std::byte needs C++17 and llvm has
too much uint8_t *) and most callers use uint8_t * instead of char *.
The functions are recently moved into `llvm::compression::zlib::`, so
downstream projects need to make adaption anyway.

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[NFC] Refactor llvm::zlib namespace

* Refactor compression namespaces across the project, making way for a possible
introduction of alternatives to zlib compression.
Changes are as follows:
*

[NFC] Refactor llvm::zlib namespace

* Refactor compression namespaces across the project, making way for a possible
introduction of alternatives to zlib compression.
Changes are as follows:
* Relocate the `llvm::zlib` namespace to `llvm::compression::zlib`.

Reviewed By: MaskRay, leonardchan, phosek

Differential Revision: https://reviews.llvm.org/D128953

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[llvm-objcopy] -O binary: align sh_offset for section changed from SHT_NOBITS

For a SHT_NOBITS section like .bss, its sh_offset is typically not
aligned by sh_addralign. If it is converted to SHT_PR

[llvm-objcopy] -O binary: align sh_offset for section changed from SHT_NOBITS

For a SHT_NOBITS section like .bss, its sh_offset is typically not
aligned by sh_addralign. If it is converted to SHT_PROGBITS by
`--set-section-flags .bss=alloc,contents`, we should conceptually align
it when computing the output size for -O binary. Otherwise the output
size may be smaller than GNU objcopy produced output.

* binary-no-paddr.test has a case with non-sensical p_paddr=1 which has
a changed behavior. Update it.

Close https://github.com/llvm/llvm-project/issues/55246

Reviewed By: jhenderson

Differential Revision: https://reviews.llvm.org/D128961

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[llvm-objcopy] Remove support for legacy .zdebug sections

clang 14 removed -gz=zlib-gnu support and ld.lld removed linker input support
for zlib-gnu in D126793. Now let's remove zlib-gnu from llvm-o

[llvm-objcopy] Remove support for legacy .zdebug sections

clang 14 removed -gz=zlib-gnu support and ld.lld removed linker input support
for zlib-gnu in D126793. Now let's remove zlib-gnu from llvm-objcopy.

* .zdebug* sections are no longer recognized as debug sections. --strip* don't remove them.
They are copied like other opaque sections
* --decompress-debug-sections does not uncompress .zdebug* sections
* --compress-debug-sections=zlib-gnu is not supported

It is very rare but in case a user has object files using .zdebug . They can use
llvm-objcopy<15 or GNU objcopy for uncompression.
--compress-debug-sections=zlib-gnu is unlikely ever used by anyone, so I do not
add a custom diagnostic.

Differential Revision: https://reviews.llvm.org/D128688

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[llvm] Convert for_each to range-based for loops (NFC)

[llvm-objcopy][ObjectYAML][mips] Add MIPS specific ELF section indexes

This fixes https://github.com/llvm/llvm-project/issues/53998
and displays correct information in obj2yaml for SHN_MIPS_*
sectio

[llvm-objcopy][ObjectYAML][mips] Add MIPS specific ELF section indexes

This fixes https://github.com/llvm/llvm-project/issues/53998
and displays correct information in obj2yaml for SHN_MIPS_*
sections according to
https://refspecs.linuxfoundation.org/elf/mipsabi.pdf

Reviewed By: jhenderson, MaskRay

Differential Revision: https://reviews.llvm.org/D123902

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Apply clang-tidy fixes for modernize-use-equals-default in ELFObject.cpp (NFC)

[llvm-objcopy] Simplify CompressedSection creation. NFC

Remove Expected<CompressedSection> factory functions in favor of constructors
now that zlib::compress returns void (D121512).

Reviewed By: jh

[llvm-objcopy] Simplify CompressedSection creation. NFC

Remove Expected<CompressedSection> factory functions in favor of constructors
now that zlib::compress returns void (D121512).

Reviewed By: jhenderson

Differential Revision: https://reviews.llvm.org/D121644

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[Support] Change zlib::compress to return void

With a sufficiently large output buffer, the only failure is Z_MEM_ERROR.
Check it and call the noreturn report_bad_alloc_error if applicable.
resize_f

[Support] Change zlib::compress to return void

With a sufficiently large output buffer, the only failure is Z_MEM_ERROR.
Check it and call the noreturn report_bad_alloc_error if applicable.
resize_for_overwrite may call report_bad_alloc_error as well.

Now that there is no other error type, we can replace the return type with void
and simplify call sites.

Reviewed By: ikudrin

Differential Revision: https://reviews.llvm.org/D121512

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[objcopy][NFC] Rename files to avoid clashing of archive members.

libtool uses file names to name members of an static library.
Files, located in different directories and having matching name,
woul

[objcopy][NFC] Rename files to avoid clashing of archive members.

libtool uses file names to name members of an static library.
Files, located in different directories and having matching name,
would have the same name inside an archive. This is not a problem
for ld, but may be a problem for ar. This patch renames files
from ObjCopy library to avoid names clashing.

See https://reviews.llvm.org/D88827#3335814

Differential Revision: https://reviews.llvm.org/D120345

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