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Signed-off-by: Samuel Holland <samuel@sholland.org>
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string: add memfrob and strfry
This adds two missing glibc string functions.
See merge request !2
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These are supposed to be specialisations for speed, but these are just
faked. Some warnings were added too, if they return infinite values.
As a side effect of this change, scalbl is also now implemented.
As noted, not all functions are implemented; the big two blockers are an
implementation of j0l and y0l; I imagine Bessel functions aren't too
widely used, so I doubt that many things will want them. Someone (not
it) can implement them later.
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__VA_ARGS__ expects one or more arguments; this is a cheesy hack to
allow passing only a format string (which is often all you need for
small asserts).
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Clean up everything and add lots of new functions
I hope everything here is okay. I fixed some bugs in existing functions (mostly wrong prototypes or off-by-one errors) and formatted everything to a consistent style. If you'd like me to adjust the style, that's no problem. It wasn't very consistent to start with (within the code, and compared to the documentation).
*I added specific notes you may want to comment on to some of the commit messages.*
Major features:
* Pass correct `argv[0]` in loader
* Intercept `readlink("/proc/self/exe")` to allow re-exec
* Add almost all reasonable-to-implement functions in LSB 5.0.0 core generic libc. Remaining functions are:
- Impossible-to-implement: sigreturn
- Not useful: reentrant random (`*rand48_r`, etc.), argz, envz, pmap, rpc (clnt_*, svc*, xdr*), bindresvport
- Got tired of it: checked wchar
* Add additional functions used by android and its NDK tools (clang, cmake, lldb, ninja, etc.).
At this point, I am able to run Android Studio with the bundled prebuilt JDK, and compile, install, and run an android application (including one with native libraries) on a real device, with only a few minor issues:
* must export `LD_LIBRARY_PATH=/opt/android-studio/jre/jre/lib/amd64/server` because musl and glibc interpret the variable differently with regards to `dlopen`. This is something that has to be patched in musl builds of openjdk, so it's not a gcompat issue.
* ld.bfd fails to parse the argument `--sysroot=/path`, but can parse `--sysroot /path`. So there's some difference with `getopt_long_only` (or getopt in general). May be a bug, may be just an API difference. May be it can be patched up.
* LLDB fails to connect to the android phone for native debugging -- I haven't tried it on glibc yet, so it may not be a gcompat issue at all (may be a phone or the app issue).
I'd be happy to send some documentation later.
See merge request !1
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Signed-off-by: Samuel Holland <samuel@sholland.org>
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This allows programs run through gcompat to fork and re-exec themselves.
It fixes readlink("/proc/self/exe") to return the executable's absolute
path, instead of musl's path.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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This takes advantage of the (lack of a) musl implementation for
simplicity.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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On musl pread and pread64 are the same thing.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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Signed-off-by: Samuel Holland <samuel@sholland.org>
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Signed-off-by: Samuel Holland <samuel@sholland.org>
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The other unimplemented signal function in LSB is sigreturn, with is not
really implementable.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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These take advantage of the musl implementation for simplicity.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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Signed-off-by: Samuel Holland <samuel@sholland.org>
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This follows the exceptionally-detailed functional description in the
manual page.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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* Document functions and sort by name.
* Explicitly include stddef.h.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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* Add all checked string functions from LSB, plus those found in use
in other applications. Document those functions from LSB as such.
* Use a consistent structure and paramater names for all functions.
* Fix multiple off-by-one errors.
* Use a less hacky and more optimized rawmemchr.
* Sort functions by name.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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* Fix prototype of __realpath_chk.
* Add all strto* functions from LSB, plus the ones thata were previously
incorrectly in string.c
The main missing LSB functions are the reentrant random functions, which
should not be used anyway.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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* Add all (non-wchar) stdio functions from LSB, plus those found in use
in other applications. Document those functions from LSB as such.
* Use a consistent structure and paramater names for all functions.
* flag == 0 means FORTIFY_SOURCE=1, so the implemented checks should be
unconditional.
* Add all possible checks without parsing the format string.
* Move functions from wchar.h to their own appropriately-named file.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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* Make function pointer static.
* Only initialize function pointer once.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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* Make comment style consistent with the rest of the project, and remove
outdated header name.
* Remove "static inline" from functions (this is no longer a header).
* Check statp for NULL in res_ninit like in res_nclose.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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Like fgetpwent_r/getpwent_r, these require a deep copy of the structure
into the caller-provided buffer. This is nontrivial for the array of
strings member.
getgrent_r is required by LSB.
[NOTE: I'm not too happy with the macro, but it works. Any suggestions?]
Signed-off-by: Samuel Holland <samuel@sholland.org>
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These functions require a deep copy of the structure into the
caller-provided buffer. Also make sure to store NULL in result on error.
Use the stream to differentiate the two functions and avoid duplication.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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* Add the missing parameter to __register_atfork.
* Sort and document functions.
__pthread_register_cancel and __pthread_unregister_cancel should be
implemented at some point, or else pthread_cleanup_pop(true) will not
work properly and could cause deadlocks in programs that use it.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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* Add finite() variants, needed by some applications.
* Add remaining long double variants of existing functions.
* Sort and document existing functions, including where referenced in
the LSB standard.
Signed-off-by: Samuel Holland <samuel@sholland.org>
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Signed-off-by: Samuel Holland <samuel@sholland.org>
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