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This patch provides definitions for `pkey_*` functions for linux x86_64.
`pkey_alloc`, `pkey_free`, and `pkey_mprotect` are simple syscall
wrappers. `pkey_set` and `pkey_get` modify architecture-specific
registers. The logic for these live in architecture specific
directories:
* `libc/src/sys/mman/linux/x86_64/pkey_common.h` has a real
implementation
* `libc/src/sys/mman/linux/generic/pkey_common.h` contains stubs that
just return `ENOSYS`.
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Reverts llvm/llvm-project#166355
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_Exit(3) is a fairly simple syscall wrapper whereas exit(3) calls
atexit-registered functions + whole lot of stuff that require support
for sync primitives.
Splitting the tests allows testing the former easily (especially for new
port projects)
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Signed-off-by: Shreeyash Pandey <shreeyash335@gmail.com>
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#160404
- Implement POSIX function "faccessat"
- Remove redundant param in facessat syscall in access implementation,
faccessat syscall does not take a flags arg
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This patch adds some hdrgen yaml for ioctl(). Otherwise the function
never actually ends up being available in a full build. This is the last
thing that is needed to enable turning on LIBCXX_ENABLE_RANDOM_DEVICE.
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Remove all the .h.def files that already express nothing
whatsoever not already expressed in YAML. Clean up a few YAML
files without materially changing any generated header output.
Many more .h.def files remain that need a bit of conversion in
YAML to express macro requirements and such.
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RV32 uses SYS_utimensat_time64 instead of SYS_utimensat but the call is
the same.
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RV32 uses SYS_ppoll_time64 instead of SYS_ppoll, but the call is the
same.
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(#134773)
#133983
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This pull request implements the `utimes` command in libc ([Issue
#133953](https://github.com/llvm/llvm-project/issues/133953)).
- [x] Add the implementation of `utimes` in `/src/sys/time`.
- [x] Add tests for `utimes` in `/test/src/sys/time`.
- [x] Add `utimes` to
[entrypoints.txt](https://github.com/llvm/llvm-project/blob/main/libc/config/linux/x86_64/entrypoints.txt)
for at least x86_64 and whatever you're building on
- [x] Add `utimes` to
[include/sys/time.yaml](https://github.com/llvm/llvm-project/blob/main/libc/include/sys/time.yaml)
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Closes #124694.
This patch adds the `sys/uio/readv` function.
ref:
https://pubs.opengroup.org/onlinepubs/009696699/functions/readv.html
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Fixes: #124149
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Closes #124633.
Some parameter types in the definition of `{get, set}rlimit` currently
do not match the standard. This patch resolves the issue.
ref: https://man7.org/linux/man-pages/man2/getrlimit.2.html
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Implement GNU extension getentropy. This function is used by many
programs to acquire entropy without handling the loop of getrandom.
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implement sys/uio/writev according to POSIX standard. This vectorized IO
API is needed by many logging libraries to achieve atomic logging
multiple strings.
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This adds a new main command-line entry point for hdrgen, in the
new main.py. This new interface is used for generating a header.
The old ways of invoking yaml_to_classes.py for other purposes
are left there for now, but `--e` is renamed to `--entry-point`
for consistency with the new CLI.
The YAML schema is expanded with the `header_template` key where
the corresponding `.h.def` file's path is given relative to where
the YAML file is found. The build integration no longer gives
the `.h.def` path on the command line. Instead, the script now
emits a depfile that's used by the cmake rules to track that.
The output file is always explicit in the script command line
rather than sometimes being derived from a directory path.
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The .yaml files should live next to the corresponding .h.def
files in libc/include/, rather than next to the implementation of
the tool in libc/utils/hdrgen/. As with the .h.def files, there
is no need for a yaml/ subdirectory under include/. This simpler
layout is more natural for maintenance and also simplifies build
integration outside the LLVM CMake build.
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Revert as its test is unstable.
https://github.com/llvm/llvm-project/issues/118057
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This PR implements process_mrelease.
A previous PR was merged #117503, but failed on merge due to an issue in
the tests. Namely the failing tests were comparing against return type
as opposed to errno. This is fixed in this PR.
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Reverts llvm/llvm-project#117503
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This PR addresses #110124.
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We are finalizing the header inclusion policy, and for our public
headers in the `libc/include` folder, they must use relative path in
`"..."` when including each other.
This PR does the cleanup making sure that all the public header
inclusions in `libc/include` folder use relative paths.
---------
Co-authored-by: Nick Desaulniers <nickdesaulniers@users.noreply.github.com>
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Previously headergen had a mechanism to copy the contents of one file
inot another. This wasn't ever used properly, and isn't supported by the
new headergen design. We will investigate better ways to support
different syscall definitions in future.
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The epoll_wait functions need the rest of the epoll functions (create,
ctl) to be available to actually test them, as well as pipe to create a
usable file descriptor. This patch adds epoll_create, epoll_create1,
epoll_ctl, and pipe. These have tests, and the tests for epoll_wait,
epoll_pwait, and epoll_pwait2 (currently disabled) are updated to use
these newly available functions.
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fixes #86449
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Performed en-masse via:
$ grep -rn "#include <ll" libc/include -l | \
xargs perl -pi -e 's/#include <ll(.*)>/#include "ll$1"/'
$ grep -rn "#include <__" libc/include -l | \
xargs perl -pi -e 's/#include <__(.*)>/#include "__$1"/'
Link: #83463
Link: #83210
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Towards the goal of getting `ninja libc-lint` back to green, fix the numerous
instances of:
warning: header guard does not follow preferred style [llvm-header-guard]
This is because many of our header guards start with `__LLVM` rather than
`LLVM`.
To filter just these warnings:
$ ninja -k2000 libc-lint 2>&1 | grep llvm-header-guard
To automatically apply fixits:
$ find libc/src libc/include libc/test -name \*.h | \
xargs -n1 -I {} clang-tidy {} -p build/compile_commands.json \
-checks='-*,llvm-header-guard' --fix --quiet
Some manual cleanup is still necessary as headers that were missing header
guards outright will have them inserted before the license block (we prefer
them after).
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The epoll_wait functions are syscall wrappers that were requested by
upstream users. This patch adds them, as well as their header and types.
The tests are currently incomplete since they require epoll_create to
properly test epoll_wait. That will be added in a followup patch since
this one is already very large.
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Reverts llvm/llvm-project#79515
Some minor breakages. Will fix tomorrow.
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The epoll_wait functions are syscall wrappers that were requested by
upstream users. This patch adds them, as well as their header and types.
The tests are currently incomplete since they require epoll_create to
properly test epoll_wait. That will be added in a followup patch since
this one is already very large.
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This header first appeared in 4.4BSD and is provided by a number of C
libraries including Newlib. Several of our embedded projects use this
header and so to make LLVM libc a drop-in replacement, we need to
provide it as well.
For the initial commit, we only implement singly linked variants (SLIST
and STAILQ). The doubly linked variants (LIST, TAILQ and CIRCLEQ) can be
implemented in the future as needed.
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Implement `prctl` as specified in
https://man7.org/linux/man-pages/man2/prctl.2.html.
This patch also includes test cases covering two simple use cases:
1. `PR_GET_NAME/PR_SET_NAME`: where userspace data is passed via arg2.
2. `PR_GET_THP_DISABLE`: where return value is passed via syscal retval.
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This adds sys/socket.h and some definitions on Linux.
Reviewed By: sivachandra
Differential Revision: https://reviews.llvm.org/D144415
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Reviewed By: michaelrj
Differential Revision: https://reviews.llvm.org/D136642
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Reviewed By: michaelrj
Differential Revision: https://reviews.llvm.org/D136375
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These headers are uncommonly used, and from extensions, but some basic
support is needed. Macros have been added where available.
Reviewed By: sivachandra
Differential Revision: https://reviews.llvm.org/D135731
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The isatty function uses the side effects of an ioctl call to determine
if a specific file descriptor is a terminal. I chose TIOCGETD (get line
discipline of terminal) because it didn't require any new structs.
Reviewed By: sivachandra, lntue
Differential Revision: https://reviews.llvm.org/D135618
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Reviewed By: michaelrj, sivachandra
Differential Revision: https://reviews.llvm.org/D134665
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A very simple and minimal implementation of fork is added. Future
changes will add more functionality to satisfy POSIX and Linux
requirements.
An implementation of wait and a few support macros in sys/wait.h
have also been added to help with testing the fork function.
Reviewed By: lntue, michaelrj
Differential Revision: https://reviews.llvm.org/D135131
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Previously the mman macros were in api.td, but platform differences are
easier to handle with preprocessor macros so they have been moved to
include. Also I completed the list of macros (at least for what I need
soon) and fixed some previously incorrect values.
Reviewed By: sivachandra, lntue
Differential Revision: https://reviews.llvm.org/D134491
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Reviewed By: lntue
Differential Revision: https://reviews.llvm.org/D134065
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Reviewed By: lntue
Differential Revision: https://reviews.llvm.org/D134016
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Reviewed By: michaelrj
Differential Revision: https://reviews.llvm.org/D132721
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They were previously incorrectly listed in fcntl.h
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Reviewed By: michaelrj
Differential Revision: https://reviews.llvm.org/D118641
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* Added missing header guards.
* Fixed license header format in a few files.
* Renamed files to more suitable names.
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Summary:
Made all header files consistent based of this documentation: https://llvm.org/docs/CodingStandards.html#file-headers.
And did the same for all source files top of file comments.
Reviewers: sivachandra, abrachet
Reviewed By: sivachandra, abrachet
Subscribers: MaskRay, tschuett, libc-commits
Tags: #libc-project
Differential Revision: https://reviews.llvm.org/D77533
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Summary:
A set of of linux x86_64 internal syscall helpers have also been added.
This change does not try to be perfect with respect to OS and machine
abstractions. A TODO note has been added at places where such abstractions
would help and make the arrangement scalable and cleaner. Addressing the
TODOs and building such abstractions is not in the scope of this change.
It is hoped that follow up changes cleaning up the problem areas and
addressing the TODOs will better illustrate the need for the changes.
This change also does not try to imitate mmap and munmap implementations
of other libcs. The idea here is to put in the bare minimum required to
obtain a working mmap and munmap, and then add the rest of the
functionality on an as needed basis.
Reviewers: abrachet, phosek, stanshebs, theraven
Subscribers: mgorny, MaskRay, jfb, libc-commits
Tags: #libc-project
Differential Revision: https://reviews.llvm.org/D71634
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