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198 commits

Author SHA1 Message Date
Andreas Kling
464a16afa2 Implement signal() via sigaction() and get rid of sys$signal(). 2018-11-28 22:27:32 +01:00
Andreas Kling
e88f306d07 Make /proc/PID/vm more readable. 
And move the unreadable detail-heavy mess to /proc/PID/vmo.
 2018-11-19 01:49:19 +01:00
Andreas Kling
526dcafd57 Some improvements to LibC malloc(). 2018-11-19 01:40:19 +01:00
Andreas Kling
85649077cd Adapt kmalloc() for userspace. 
A slightly more useful malloc() for userspace. The max allocation limit
is still 128 kB, but at least now free() is able to recycle memory.
 2018-11-19 00:53:02 +01:00
Andreas Kling
de4604ac95 Finally hook up the mkdir code to a syscall. 
Added a /bin/mkdir that makes directories. How very neat :^)
There are various limitations because of missing functionality.
 2018-11-18 15:02:16 +01:00
Andreas Kling
303577df16 Various stubs while trying to get an old coreutils to build. 2018-11-17 15:56:09 +01:00
Andreas Kling
9d05f6b7a7 Make bash-2.05b build with minimal changes. 
This is really neat. :^)
 2018-11-17 00:14:07 +01:00
Andreas Kling
2cf477a151 Add fcntl() F_DUPFD which is slightly different from dup2(). 2018-11-16 22:14:40 +01:00
Andreas Kling
8a286b9244 Improve syscall address validation a bit. 2018-11-16 16:10:59 +01:00
Andreas Kling
084287ca45 Reimplement tcsetattr/tcgetattr as ioctls. 2018-11-16 15:41:48 +01:00
Andreas Kling
c99f8af66d Add ioctl() and reimplement tcsetpgrp/tcsetpgrp as ioctls. 2018-11-16 13:13:50 +01:00
Andreas Kling
97c799576a Add close-on-exec flag for file descriptors. 
I was surprised to find that dup()'ed fds don't share the close-on-exec flag.
That means it has to be stored separately from the FileDescriptor object.
 2018-11-13 01:36:31 +01:00
Andreas Kling
f1404aa948 Add primitive FIFO and hook it up to sys$pipe(). 
It's now possible to do this in bash:

cat kernel.map | fgrep List

This is very cool! :^)
 2018-11-12 01:28:46 +01:00
Andreas Kling
18e3ddf605 Add a naive /bin/fgrep for testing pipes. 2018-11-11 20:42:41 +01:00
Andreas Kling
d5d45d1088 Rage hacking to get bash to run. It finally runs. So cool! :^) 2018-11-11 15:38:07 +01:00
Andreas Kling
9b70808ab5 Add really cheap atol() since sizeof(int) == sizeof(long) here anyway. 2018-11-11 10:40:50 +01:00
Andreas Kling
f394e3486a Stub out a bunch more functions to get closer to that sweet bash build. 2018-11-11 10:38:33 +01:00
Andreas Kling
e48182d91b Add setvbuf(), setlinebuf(), setbuf(). 2018-11-11 10:11:09 +01:00
Andreas Kling
7cc4caee4f Add ispunct() to LibC + some minor cleanups. 2018-11-11 00:44:04 +01:00
Andreas Kling
3b2f172d48 A bunch of compat work (mostly stubs but some real implementations, too.) 
Another pass at getting bash-1.14.7 to build. Not that many symbols remain.
 2018-11-11 00:20:53 +01:00
Andreas Kling
6a0a2c9ab4 Some improvements to signals. 
- Add sigprocmask() and sigpending().
- Forked children inherit signal dispositions and masks.
- Exec clears signal dispositions and masks.
 2018-11-10 23:30:41 +01:00
Andreas Kling
8605711f4b Make /bin/clear work again. 
After I made stdio buffered, we were dropping anything unflushed on exit.
Since /bin/clear just prints out some escape sequences without a newline,
the entire buffer was being discarded.

Also add VirtualConsole::clear() that handles clearing of background VC's.
 2018-11-10 00:56:10 +01:00
Andreas Kling
4914f3b837 Build LibC and Userland with clang as well. 2018-11-09 14:29:00 +01:00
Andreas Kling
7b3b5f745f Move <utsname.h> to <sys/utsname.h> for correctness. 2018-11-09 10:24:41 +01:00
Andreas Kling
8249c086c3 Get rid of redundant sys$spawn now that we have fork+exec. 2018-11-09 10:22:27 +01:00
Andreas Kling
e9cdb6bb9b Fix all current build warnings in LibC. 2018-11-09 10:09:46 +01:00
Andreas Kling
3c8064a787 Support basic mmap'ing of a file! 
All right, we can now mmap() a file and it gets magically paged in from fs
in response to an NP page fault. This is really cool :^)

I need to refactor this to support sharing of read-only file-backed pages,
but it's cool to just have something working.
 2018-11-08 12:59:16 +01:00
Andreas Kling
fdbd9f1e27 Start working on memory-mapped files. 
First of all, change sys$mmap to take a struct SC_mmap_params since our
sycsall calling convention can't handle more than 3 arguments.

This exposed a bug in Syscall::invoke() needing to use clobber lists.
It was a bit confusing to debug. :^)
 2018-11-08 11:40:58 +01:00
Andreas Kling
da3857b0c2 Add some simple write buffering to LibC's stdio. 
Plumb it all the way to the VirtualConsole. Also fix /bin/cat to write()
the whole chunks we get from read() directly to stdout.
 2018-11-08 01:23:47 +01:00
Andreas Kling
0b3e927597 Oops, waitpid() was not passing the options parameter to the kernel. 2018-11-07 10:46:48 +01:00
Andreas Kling
d7a41579e5 Miscellaneous compat work while seeing if GNU coreutils would build. 2018-11-07 10:23:16 +01:00
Andreas Kling
a7f1d892a9 Add some basic setgroups(), getgroups() and initgroups(). 
Also teach /bin/id to print the user's supplemental groups.
 2018-11-07 01:38:51 +01:00
Andreas Kling
d3bd3791cb Minor fixes in getgrent() and getpwent() function families. 2018-11-07 00:33:10 +01:00
Andreas Kling
90bab5ea71 Add getgrent() family of functions. 2018-11-06 22:27:51 +01:00
Andreas Kling
e5e0bffd76 Add getwd(). 2018-11-06 15:59:57 +01:00
Andreas Kling
7c3746592b Add strsignal() and improve sharing signal numbers between LibC and kernel. 2018-11-06 15:45:16 +01:00
Andreas Kling
8d1f8b2518 Add sys_nerr and sys_errlist. 
Also keep the canonical errno list in LibC for now. The kernel gets it
from there. This makes building 3rd party code easier.

..also fix broken strchr().
 2018-11-06 14:42:28 +01:00
Andreas Kling
b2d23f83ab Add umask(). 2018-11-06 13:47:56 +01:00
Andreas Kling
77fe8e8363 Add getppid(). 2018-11-06 13:33:57 +01:00
Andreas Kling
3024167cbd Change syscall naming scheme. 2018-11-06 13:33:54 +01:00
Andreas Kling
46f0c28a4a Add sigset_t helper functions to LibC. 2018-11-06 12:02:58 +01:00
Andreas Kling
153ea704af Add some basic signal support. 
It only works for sending a signal to a process that's in userspace code.

We implement reception by synthesizing a PUSHA+PUSHF in the receiving process
(operating on values in the TSS.)
The TSS CS:EIP is then rerouted to the signal handler and a tiny return
trampoline is constructed in a dedicated region in the receiving process.

Also hacked up /bin/kill to be able to send arbitrary signals (kill -N PID)
 2018-11-06 10:56:41 +01:00
Andreas Kling
9f2b9c82bf More work towards getting bash to build. 
Implemented some syscalls: dup(), dup2(), getdtablesize().
FileHandle is now a retainable, since that's needed for dup()'ed fd's.
I didn't really test any of this beyond a basic smoke check.
 2018-11-05 19:01:59 +01:00
Andreas Kling
82f84bab11 More random compat hacking towards getting bash to build. 
I'm now at the build stage where it complains about a bajillion missing
symbols. This is a good place to be!
 2018-11-05 18:21:42 +01:00
Andreas Kling
e76312ab63 Lots of minor compat stuff while seeing if bash would build. 
We're quite far from bash building, but we'll get there eventually!
 2018-11-05 16:40:48 +01:00
Andreas Kling
e4611248c4 Add geteuid() and getegid(). 
There's no support for set-uid or set-gid executables yet so these don't
actually do anything. It's just nice to get the boilerplate stuff in.
 2018-11-05 15:05:27 +01:00
Andreas Kling
60a8144b68 Add stub fflush(). 2018-11-05 14:56:05 +01:00
Andreas Kling
8039a20611 Tiny LibC things. 2018-11-05 14:54:11 +01:00
Andreas Kling
b5c5286ee1 Tidy up ELFLoader. 2018-11-04 14:11:16 +01:00
Andreas Kling
9bd09454e3 Mark LibC's assertion faillure helper with __NORETURN. 2018-11-04 13:13:57 +01:00