[lld/mac] Change load command order to be more like ld64

No meaningful behavior change. Makes diffing `otool -l` output a bit easier.

Differential Revision: https://reviews.llvm.org/D106219

[lld-macho][nfc] Sort OutputSections based on explicit order of command-line inputs

This diff paves the way for {D102964} which adds a new kind of
InputSection.

We previously maintained section ord

[lld-macho][nfc] Sort OutputSections based on explicit order of command-line inputs

This diff paves the way for {D102964} which adds a new kind of
InputSection.

We previously maintained section ordering implicitly: we created
InputSections as we parsed each file in command-line order, and passed
on this ordering when we created OutputSections and OutputSegments by
iterating over these InputSections. The implicitness of the ordering
made it difficult to refactor the code to e.g. handle a new type of
InputSection. As such, I've codified the ordering explicitly via
`inputOrder` fields. This also allows us to use `sort` instead of
`stable_sort`.

Benchmarking chromium_framework on my 3.2 GHz 16-Core Intel Xeon W:

N Min Max Median Avg Stddev
x 20 4.23 4.35 4.27 4.274 0.030157481
+ 20 4.24 4.38 4.27 4.2815 0.033759989
No difference proven at 95.0% confidence

Reviewed By: #lld-macho, alexshap

Differential Revision: https://reviews.llvm.org/D102972

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[lld-macho] Implement builtin section renaming

ld64 automatically renames many sections depending on output type and assorted flags. Here, we implement the most common configs. We can add more obscu

[lld-macho] Implement builtin section renaming

ld64 automatically renames many sections depending on output type and assorted flags. Here, we implement the most common configs. We can add more obscure flags and behaviors as needed.

Depends on D101393

Differential Revision: https://reviews.llvm.org/D101395

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[lld-macho] Have tests default to targeting macos 10.15

D101114 enforced proper version checks, which exposed a variety of version
mismatch issues in our tests. We previously changed the test inputs

[lld-macho] Have tests default to targeting macos 10.15

D101114 enforced proper version checks, which exposed a variety of version
mismatch issues in our tests. We previously changed the test inputs to
target 10.0, which was the simpler thing to do, but we should really
just have our lit.local.cfg default to targeting 10.15, which is what is done
here. We're not likely to ever have proper support for the older versions
anyway, as that would require more work for unclear benefit; for instance,
llvm-mc seems to generate a different compact unwind format for older macOS
versions, which would cause our compact-unwind.s test to fail.

Targeting 10.15 by default causes the following behavioral changes:
* `__mh_execute_header` is now a section symbol instead of an absolute symbol
* LC_BUILD_VERSION gets emitted instead of LC_VERSION_MIN_MACOSX. The former is
32 bytes in size whereas the latter is 16 bytes, so a bunch of hardcoded
address offsets in our tests had to be updated.
* >= 10.6 executables are PIE by default

Note that this diff was stacked atop of a local revert of most of the test
changes in rG8c17a875150f8e736e8f9061ddf084397f45f4c5, to make review easier.

Reviewed By: #lld-macho, oontvoo

Differential Revision: https://reviews.llvm.org/D101119

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[lld][MachO] Add support for LC_VERSION_MIN_* load commands

This diff adds initial support for the legacy LC_VERSION_MIN_* load commands.

Test plan: make check-lld-macho

Differential revision: htt

[lld][MachO] Add support for LC_VERSION_MIN_* load commands

This diff adds initial support for the legacy LC_VERSION_MIN_* load commands.

Test plan: make check-lld-macho

Differential revision: https://reviews.llvm.org/D100523

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[test] Fix unused check prefixes

[lld-macho] Fix alignment & layout to match ld64 and satisfy kernel & codesign

The Mach kernel & codesign on arm64 macOS has strict requirements for alignment and sequence of segments and sections.

[lld-macho] Fix alignment & layout to match ld64 and satisfy kernel & codesign

The Mach kernel & codesign on arm64 macOS has strict requirements for alignment and sequence of segments and sections. Dyld probably is just as picky, though kernel & codesign reject malformed Mach-O files before dyld ever has a chance.

I developed this diff by incrementally changing alignments & sequences to match the output of ld64. I stopped when my hello-world test program started working: `codesign --verify` succeded, and `execve(2)` didn't immediately fail with `errno == EBADMACHO` = `"Malformed Mach-O file"`.

Differential Revision: https://reviews.llvm.org/D94935

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