Commit graph

9 commits

Author SHA1 Message Date
Andreas Kling
94ca55cefd Meta: Add license header to source files
As suggested by Joshua, this commit adds the 2-clause BSD license as a
comment block to the top of every source file.

For the first pass, I've just added myself for simplicity. I encourage
everyone to add themselves as copyright holders of any file they've
added or modified in some significant way. If I've added myself in
error somewhere, feel free to replace it with the appropriate copyright
holder instead.

Going forward, all new source files should include a license header.
2020-01-18 09:45:54 +01:00
Andrew Kaster
4cb7c8ea85 LibC: Move even more methods and globals out of crt0.o 2020-01-13 13:03:30 +01:00
Andrew Kaster
96a86463dd LibC: Move __cxa_finalize and __cxa_atexit code to their own file
These guys aren't really related to initializing the C runtime,
so move them to a new fancy file named C++ abi. Or rather, cxxabi :)
2020-01-01 17:48:41 +01:00
Andrew Kaster
150837e7e8 LibC: Prevent assertions in malloc/free at exit time
This is a bit sad, but, with the Allocators as static globals their
destructors were running before some user code. Which doesn't really
make much sense, as none of the members of (at least the basic one) do
any real heavy lifting or have many resources to RAII.

To avoid the problem, just mmap the memory for the global arrays of
Allocators in __malloc_init and let the Kernel collect the memory when
we're done with the process.
2019-12-22 10:47:39 +01:00
Andrew Kaster
824bbc7462 LibC: Support exit time destructors per the Itanium C++ ABI
Implement __cxa_atexit and __cxa_finalize per the Itanium spec,
and convert stdlib's atexit and exit() to to call them instead of
a custom 'C-only' atexit implementation.
2019-12-22 10:47:39 +01:00
Andreas Kling
842716a0b5 Kernel+LibC: Build with basic -fstack-protector support
Use simple stack cookies to try to provoke an assertion failure on
stack overflow.

This is far from perfect, since we use a constant cookie instead of
generating a random one on startup, but it can still help us catch
bugs, which is the primary concern right now. :^)
2019-12-20 21:03:32 +01:00
Andreas Kling
c74e4d0c80 LibC: Pass the environment as third argument to main()
After some very confused debugging, I discovered that GNU make has a
main() function with this signature:

    int main(int argc, char** argv, char** envp)

Apparently this is a non-standard but widely supported thing, so let's
do the same in Serenity so make works as expected.

This fixes an issue where you had to do "make PATH=..." instead of make
just picking up PATH from the environment. :^)
2019-09-12 21:43:32 +02:00
Andreas Kling
af14b8dc59 LibC: Make "errno" thread-specific
Now that the kernel supports thread-local storage, we can declare errno
with the __thread keyword, which causes it to be per-thread.

This should fix all the stupid issues that happen when many threads use
the same errno. :^)
2019-09-07 15:57:02 +02:00
Andreas Kling
04b9dc2d30 Libraries: Create top level directory for libraries.
Things were getting a little crowded in the project root, so this patch
moves the Lib*/ directories into Libraries/.
2019-07-04 16:16:50 +02:00
Renamed from LibC/crt0.cpp (Browse further)