Commit Graph

464 Commits

Author SHA1 Message Date
af0f4d2037 Kernel: Remove /dev/uptime
This information can now be fetched with clock_gettime.
2022-10-30 10:16:53 +01:00
e640c6e245 Kernel, libc, userspace: Add file timestamps (atime,ctime,mtime) 2022-10-30 09:57:17 +01:00
8d46c9bbe2 Kernel, libc: Fix a big bug in printf()
Every time printf flushes the buffer to us in sprintf() or snprintf(), we call strncat to append the data.

But we want to start from the beginning in the first flush. What if there was data already there?
Well, we just append to the old data. Which is not good, and breaks snprintf()'s maximum size policy.

This fix sets the first byte of str to NULL, to avoid this.
2022-10-30 09:53:23 +01:00
688a640a16 Kernel: Add the clock_gettime syscall, which replaces clock as it can be used for more stuff 2022-10-30 09:07:59 +01:00
baf97840e9 Kernel: Keep track of boot time 2022-10-30 09:07:03 +01:00
d1e4bc5504 Kernel: Use framebuffer virtual address instead of physical address
Just found out bootboot.fb_ptr was the physical address, not virtual.
That explains why we were getting page faults while writing to the physical address of the framebuffer. (we were in a user address space when doing so)
So this should probably make the system much more stable!!
2022-10-29 20:10:49 +02:00
32e09d3417 libc: Stub out more functionality so part of binutils builds 2022-10-29 09:39:12 +02:00
2ca20c1a1e compilation fix 2022-10-28 21:02:23 +02:00
e05f3f5325 Kernel: Read file modes from the initrd, filtering out write permissions 2022-10-28 20:52:10 +02:00
a2d9ada4dc oopsie 2022-10-28 19:38:04 +02:00
b8296eb92d su: Also set group ID 2022-10-28 17:55:56 +02:00
09a615bd99 Kernel, libc: Expose processes' UID and GID in pstat() 2022-10-28 17:31:34 +02:00
1c4f1ab867 Kernel, libc: Add setuid() and setgid() system calls 2022-10-28 17:19:26 +02:00
c312d81de4 Kernel, libc: Add st_uid and st_gid to stat, and handle st_mode differently 2022-10-28 17:13:20 +02:00
26b20938de Kernel, libc: Use mode in mkdir() 2022-10-28 17:11:35 +02:00
0115cce750 Kernel/VFS: Add file owners and file modes, and check those in system calls 2022-10-28 17:10:28 +02:00
6ddfc5ee52 Kernel: Invoke sys_stat when asked 2022-10-28 17:06:33 +02:00
16dc227a05 Kernel: Add UID and GID fields to Task 2022-10-28 17:06:13 +02:00
3effe8b004 Kernel: Add EACCES to std/errno.h 2022-10-28 17:02:27 +02:00
50cda50f01 Kernel, libc: Add F_GETFD, F_SETFD and FD_CLOEXEC 2022-10-27 17:17:24 +02:00
fcf53ef6a5 Kernel: Make waitpid() block by default unless WNOHANG is specified 2022-10-27 17:05:42 +02:00
06e6429567 Kernel: Reorganize a bit of scheduler code 2022-10-27 08:07:34 +02:00
f9dad8a8d6 Kernel, libc: Stub out struct stat.st_dev 2022-10-27 08:01:33 +02:00
9b0f6b6595 Kernel, libc: Add O_EXCL 2022-10-27 07:55:59 +02:00
1c35eabb2b open(): Add a third optional mode argument 2022-10-27 07:52:57 +02:00
a3c6635f3e Kernel, libc: Add O_APPEND and stub out O_CREAT and O_TRUNC 2022-10-27 07:43:55 +02:00
41f7232b77 Devices: Return EOF after first read for some devices
Still not optimal.
2022-10-26 20:54:47 +02:00
e1f58c0163 Kernel: If wrapping a line at screen bottom, scroll properly 2022-10-26 20:14:24 +02:00
a4e430d35e Kernel: count the null byte while calculating how much stack space argv will use 2022-10-26 20:05:24 +02:00
7d20c507b1 Kernel, libc, userspace: Implement command-line arguments (argv)
The only thing missing now is for sh to pass them on.
2022-10-26 18:57:06 +02:00
af452e2b2a Kernel, libc: Add dup2() 2022-10-25 18:58:06 +02:00
af46b8d9ac Kernel: Cleanup file descriptor validation 2022-10-25 18:35:17 +02:00
ec2c314234 Kernel: Add /dev/null 2022-10-25 17:59:55 +02:00
d458c5c848 Fix kernel/Makefile 2022-10-24 20:52:11 +02:00
0dec5f7bad libc: Add dummy getcwd() 2022-10-24 17:05:28 +02:00
58b01b74e2 Kernel, libc: Add stat() 2022-10-23 18:35:32 +02:00
0c04246300 Next version! 2022-10-23 17:24:18 +02:00
e457b88b04 Kernel, libc: Implement O_DIRECTORY and use that in dirent.h 2022-10-23 14:46:27 +02:00
8bf2904d74 libc: Implement a basic subset of dirent.h 2022-10-23 14:41:45 +02:00
14367f07b5 Kernel: Add support for getdents() to DeviceFS 2022-10-23 14:05:55 +02:00
78d72c2f0c Kernel, libc: Add a getdents() system call
This is meant to be a low-level interface to implement dirent.h on top of.
2022-10-23 14:03:46 +02:00
cf94ca2a4e Kernel: Update libk's string.h 2022-10-22 19:06:06 +02:00
437f51add7 Kernel: move over the mem* functions from libc 2022-10-22 19:04:35 +02:00
20429929dd InitRD: Bump up the filesystem limits 2022-10-22 17:23:22 +02:00
58ca030711 initrd: warn when failing to register stuff 2022-10-22 17:21:34 +02:00
fef7dd5867 Rename [moon-reaper] to [reaper] 2022-10-22 14:43:41 +02:00
bcdcfc4b45 Kernel: Add a pstat() system call
Not part of C or POSIX, but since there is no procfs right now, I thought it would be nice to have an interface to query process information.
It works like this: you pass the process ID and a pointer to a struct pstat (can be null).
If the process ID is -1, the kernel picks the process with the highest PID.
Then, if the pointer to a pstat struct is not null, the kernel fills it in with the process's information, and returns the process's PID.
2022-10-22 14:26:29 +02:00
6816a5b11f Scheduler: do not reboot on PID 1 exit if we are in a test 2022-10-22 11:56:08 +02:00
0faabe02e5 Kernel, libc: Implement O_CLOEXEC 2022-10-22 10:28:02 +02:00
b2f5a0502f Kernel, libc: Implement O_NONBLOCK 2022-10-21 21:51:03 +02:00
da61e3648f Kernel: Implement blocking reads
This is a huge step forward!! bc actually runs now, without echo or backspace, but it runs!!
2022-10-21 21:26:19 +02:00
bef9158450 Kernel, libc: Add isatty() and F_ISTTY to fcntl() 2022-10-21 18:34:31 +02:00
93207820b3 libc: Add a few errors to errno.h
As well as ino_t, which I forgot in the fstat() commit :)
2022-10-21 18:34:01 +02:00
fcf191aa7a Kernel, libc: Add fstat() 2022-10-21 18:31:09 +02:00
a06e1c5a21 VFS: Remove warning when file is not found
That is a common ocurrence.
2022-10-20 19:11:50 +02:00
f7cf395f71 Kernel, libc: Add access() 2022-10-20 19:03:24 +02:00
27448611b3 UserMemory: do not map refs into kernel memory
This is bad design. But it fails if mapped, since something overwrites KernelHeap.
2022-10-20 18:50:07 +02:00
712f4f5e51 KernelHeap: Add more debug logging 2022-10-20 18:49:33 +02:00
9d0dfbaedf PMM: Log invalid frees 2022-10-20 18:49:12 +02:00
073c90e948 InitRD: leak an unused pointer so kmalloc() doesn't map memory all the time 2022-10-20 18:49:00 +02:00
cd9ecc1746 Kernel: Return EFAULT when the kernel believes the wstatus pointer is invalid 2022-10-20 08:20:56 +02:00
47bdfecedb Devices: Add /dev/uptime
This file contains how many milliseconds have passed since boot at the time of reading it :)
2022-10-19 21:11:12 +02:00
1938a059a2 Kernel: Free the last spawned thread's PID on exit 2022-10-19 20:51:54 +02:00
51665a04b7 Kernel: Restart if init exits 2022-10-19 20:33:41 +02:00
7e9744419e sh: Improve it 2022-10-19 20:16:21 +02:00
3c5c92c7c3 sh: Add a simple interactive shell 2022-10-19 19:42:05 +02:00
b035795eb3 Kernel: Move errno.h and (k)assert.h out of the main include directory
This is mostly so IDEs don't pick them up instead of the userspace headers :)
2022-10-19 17:41:23 +02:00
f3af3e252b Kernel: refresh task_misbehave()
That function was severely outdated.
2022-10-19 17:26:36 +02:00
ef8ba3dec4 Kernel: Do not hang when a user task misbehaves
This was for testing/debugging. But we DEFINITELY don't want that.
2022-10-19 17:25:56 +02:00
656667812a Kernel: reparent child processes to PID 1 when their parent exits 2022-10-19 17:16:01 +02:00
a29f7f8df2 Kernel: waitpid: support -1 as PID (wait for any child) 2022-10-19 17:15:30 +02:00
48d4a5910a Kernel: Add a few convenience functions to manipulate userland memory 2022-10-19 17:13:16 +02:00
755242719c VMM: Add a few memsets
This seems to fix exec() making weird page tables!!
2022-10-19 07:56:08 +02:00
671f2a2de3 Kernel, libc: Implement waitpid()
FIXME: exec() is now doing weird page table stuff. But at least it works, no panics :)
2022-10-18 21:30:52 +02:00
bb00e3c112 Kernel: Guard against recursive panics
Previously, when we panicked (page-fault for example) while dumping a kernel panic, it would just loop over and over again.

Now, we check if we were already in a panic, and limit the dump:
- No stack trace.
- Only a few registers.
- Only serial (since we can page fault while writing to the framebuffer)

This should make recursive panics much more difficult to achieve.
If we page-fault while writing to console, we don't even see a panic (not even in serial) and eventually triple-fault.
So this patch is actually more user-friendly.
2022-10-18 21:08:21 +02:00
59506b8852 Kernel: Show current_task's name in the log 2022-10-18 18:41:17 +02:00
52d391507d Kernel: Rename the getpid() syscall to getprocid()
Now, we have one single system call to fetch all sorts of identifiers:
PID, PPID, UID, GID; EUID, EGID, and more...
2022-10-18 17:36:17 +02:00
a9d3bdba6f Kernel: Keep track of a task's PPID 2022-10-18 17:18:37 +02:00
bdf1bb15a1 StackTracer: only show kernel addresses for now, until there are more checks 2022-10-18 17:14:09 +02:00
48d68a3e31 Kernel: Switch back to kernel address space on kernel panic 2022-10-18 17:13:43 +02:00
92d8c9d4d5 Next version! 2022-10-17 21:28:35 +02:00
4f41b9ed37 Scheduler: Implement a find_by_pid function 2022-10-17 20:40:38 +02:00
8b17065718 Kernel, libc: Rename gettid() to getpid() and move it to unistd.h 2022-10-17 20:08:44 +02:00
87ef210759 Kernel, libc: Remove spawn()
Now, fork() and exec() are both implemented. More POSIX-y, thus spawn can be removed.
2022-10-17 19:55:01 +02:00
a2c05de604 mmap(), mprotect(), munmap(): Check more stuff 2022-10-17 19:32:24 +02:00
593daba651 Kernel: Remove unused headers in main.cpp 2022-10-17 19:23:53 +02:00
ea8a42b8c0 Kernel: Add a name field to the Task structure 2022-10-17 19:12:47 +02:00
34fc6996b0 UserHeap: allocate needed memory in request_virtual_pages 2022-10-17 18:52:11 +02:00
92634048fc UserHeap: some nice improvements 2022-10-17 18:49:19 +02:00
64f5078494 Kernel, libc: Implement fork()
This time for real.

Also, add a new per-user-task virtual address allocator (UserHeap), so that mmap'ed pages are in user range and can be copied.
2022-10-17 18:43:35 +02:00
966fdc76d7 Move userspace task to userspace memory 2022-10-17 17:30:05 +02:00
b334e1cd50 VMM: check if the entry is already present 2022-10-17 17:26:16 +02:00
682be58d97 AddressSpace: copy instead of linking 2022-10-17 17:24:33 +02:00
250db2c90f Scheduler: add an append_task() function 2022-10-17 17:14:22 +02:00
c2fa4f380d Kernel: Use the new Task member functions 2022-10-17 17:07:25 +02:00
ce10fb5743 fcntl(F_DUPFD): Allocate any file descriptor greater than or equal to arg 2022-10-17 17:01:22 +02:00
891651f2d6 Task: Move functions operating on Task to member functions
Also, add an alloc_fd_greater_than_or_equal() function, for use in fcntl(F_DUPFD)
2022-10-17 17:00:07 +02:00
e34045a78c Kernel: on stack smashing detection, do not trigger a normal panic
That triggers stack traces, which we do not want in a stack smash fail situation
2022-10-16 19:04:24 +02:00
9b39d618de Kernel, libc: Implement spawn()
This function is a Luna alternative to fork() and exec().

Why? Simply because I can't figure out for the life of me how to implement a working fork().

So meanwhile, we have spawn() as a replacement. exec() still exists, though.
2022-10-16 18:48:35 +02:00
a1146a5ce2 Panic: show panic message on screen 2022-10-16 18:23:33 +02:00