platform_external_libunwind_llvm/src/assembly.h, branch master

Update more file headers across all of the LLVM projects in the monorepo

2019-01-19T10:56:40+00:00

to reflect the new license. These used slightly different spellings that
defeated my regular expressions.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@351648 91177308-0d34-0410-b5e6-96231b3b80d8

[Sparc] Add Sparc V8 support

2019-01-14T10:15:20+00:00

Summary:
Adds the register class implementation for Sparc.
Adds support for DW_CFA_GNU_window_save.
Adds save and restore context functionality.

Adds getArch() function to each Registers_ class to be able to separate
between DW_CFA_AARCH64_negate_ra_state and DW_CFA_GNU_window_save which
are both represented by the same constant.

On Sparc the return address is the address of the call instruction, so
an offset needs to be added when returning to skip the call instruction
and its delay slot. If the function returns a struct it is also necessary
to skip one extra instruction on Sparc V8.

Reviewers: jyknight, mclow.lists, mstorsjo, compnerd

Reviewed By: jyknight, compnerd

Subscribers: jgorbe, mgorny, christof, llvm-commits, fedor.sergeev, JDevlieghere, ldionne, libcxx-commits

Differential Revision: https://reviews.llvm.org/D55763

git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@351044 91177308-0d34-0410-b5e6-96231b3b80d8

Revert "[Sparc] Add Sparc V8 support"

2019-01-10T01:08:31+00:00

This reverts commit r350705.

git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@350787 91177308-0d34-0410-b5e6-96231b3b80d8

[Sparc] Add Sparc V8 support

2019-01-09T12:06:05+00:00

Summary:
Adds the register class implementation for Sparc.
Adds support for DW_CFA_GNU_window_save.
Adds save and restore context functionality.

On Sparc the return address is the address of the call instruction,
so an offset needs to be added when returning to skip the call instruction
and its delay slot. If the function returns a struct it is also necessary
to skip one extra instruction.

Reviewers: jyknight, mclow.lists, mstorsjo, compnerd

Reviewed By: compnerd

Subscribers: fedor.sergeev, JDevlieghere, ldionne, libcxx-commits

Differential Revision: https://reviews.llvm.org/D55763

git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@350705 91177308-0d34-0410-b5e6-96231b3b80d8

Don't export assembly functions when function visibility annotations are disabled

2018-12-11T07:34:14+00:00

Patch by Peiyuan Song!

Differential Revision: https://reviews.llvm.org/D55537

git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@348832 91177308-0d34-0410-b5e6-96231b3b80d8

Export public functions implemented in assembly on Windows.

2018-08-31T18:11:48+00:00

Summary:
By default, symbols aren't visible outside of the module that defines
them. To make them visible, they must be exported. The easiest way to do
that is to embed an `-export:symname` directive into the object file.

Reviewers: mstorsjo, rnk

Subscribers: christof, cfe-commits

Differential Revision: https://reviews.llvm.org/D51508

git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@341232 91177308-0d34-0410-b5e6-96231b3b80d8

[PPC64] Added vector registers.

2018-01-16T20:54:10+00:00

The Registers_ppc64 class needed a couple of changes, both to accommodate the
new registers as well as to handle the overlaps of VS register set
without wasting space.

The save/restore code of V and VS registers was added.
As VS registers depend on the VMX extension, they are processed only if
VMX support is detected (_ARCH_PWR8 for now).

Patch by Leandro Lupori!

Differential Revision: https://reviews.llvm.org/D41906

git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@322596 91177308-0d34-0410-b5e6-96231b3b80d8

Reland [PPC64] Port to ppc64le - initial version

2018-01-02T22:11:30+00:00

Initial working version of libunwind for PowerPC 64. Tested on
little-endian ppc64 host only.
Based on the existing PowerPC 32 code.

It supports:

- context save/restore (unw_getcontext, unw_init_local, unw_resume)
- read/write from/to saved registers
- backtrace (unw_step)

Patch by Leandro Lupori!

Differential Revision: https://reviews.llvm.org/D41386

Now builds with LIBUNWIND_ENABLE_CROSS_UNWINDING=ON should
work.

git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@321680 91177308-0d34-0410-b5e6-96231b3b80d8

Revert `rL321667: [PPC64] Port to ppc64le - initial version`

2018-01-02T22:04:03+00:00

Differential Revision: https://reviews.llvm.org/D41386

git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@321678 91177308-0d34-0410-b5e6-96231b3b80d8

[PPC64] Port to ppc64le - initial version

2018-01-02T20:10:54+00:00

Initial working version of libunwind for PowerPC 64. Tested on
little-endian ppc64 host only.
Based on the existing PowerPC 32 code.

It supports:

- context save/restore (unw_getcontext, unw_init_local, unw_resume)
- read/write from/to saved registers
- backtrace (unw_step)

Patch by Leandro Lupori!

Differential Revision: https://reviews.llvm.org/D41386

git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@321667 91177308-0d34-0410-b5e6-96231b3b80d8