Bananymous/banan-os
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bf617036c7dcb93ff61d9715e9abf3787b80e490
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77 Commits

Author SHA1 Message Date
Bananymous
bf617036c7 Kernel: Rework syscall calling 
I removed the intermediate function when calling syscalls. Now syscall
handler calls the current process automatically. Only exception is
sys_fork, since it needs a assembly trampoline for the new thread.
 2023-06-12 14:16:48 +03:00
Bananymous
91f812e17f Kernel: Exceptions will now enable interrupts before calling exit() 
this allows scheduler verification on reschedule() not panic
 2023-06-11 03:29:22 +03:00
Bananymous
db49cbd6e2 Kernel: We now store the processes exit code 2023-06-10 17:31:56 +03:00
Bananymous
2b9900e56e Kernel: get_free_contiguous_pages works with non-page aligned addresses 
also fix bug in ordering
 2023-06-06 02:03:23 +03:00
Bananymous
b0e9ab0519 Kernel/LibC: pass environ pointer to process 2023-06-05 21:12:08 +03:00
Bananymous
8352392b38 Kernel: You can specify first vaddr for getting free pages 2023-06-04 01:15:48 +03:00
Bananymous
9f75d9cfe5 Kernel: PageTable now has debug_dump 
This dumps all the mapped pages and their flags
 2023-06-03 20:08:13 +03:00
Bananymous
a42af7e973 Kernel: boot.S is back to 2 MiB pages 
bochs doesn't seem to support 1 GiB pages
 2023-06-03 18:53:36 +03:00
Bananymous
eafa09fecf Kernel: boot.S maps GiB as single pdpte 2023-05-31 00:51:15 +03:00
Bananymous
8175348284 Kernel: Fix comment 2023-05-31 00:51:15 +03:00
Bananymous
b2832cb47a Kernel: PageTable destructor works now 
we are successfully booting higher half kernel now :)
 2023-05-31 00:44:14 +03:00
Bananymous
9f499991c8 Kernel: PageTable::create_userspace() now works 2023-05-31 00:44:14 +03:00
Bananymous
ed0dcacab3 Kernel: Move V2P and P2V to Memory/Types.h 2023-05-30 23:57:03 +03:00
Bananymous
e86050f343 Kernel: PageTable::map_range_at maps correctly the last page 2023-05-30 23:56:07 +03:00
Bananymous
57f7da6ce1 Kernel: Booting with higher half kernel gets to Heap initialization 2023-05-30 22:21:12 +03:00
Bananymous
93e6455171 Kernel: start work on higher half kernel 2023-05-30 08:00:17 +03:00
Bananymous
265fe9c62e Kernel: We now identity map full GiB in boot.S 
The paging structure is pre-built so no unnecessary calculations are done
 2023-05-30 00:08:52 +03:00
Bananymous
e640344d7a Kernel: Rename MMU to PageTable 
This is more descriptive name for what it actually represents
 2023-05-29 21:06:09 +03:00
Bananymous
7151bb86a8 Kernel/LibC: opening standard files is done in libc 2023-05-29 20:21:19 +03:00
Bananymous
3d95cf02f3 Kernel: We can't lock the MMU lock in load() 
It needs to be callable always by scheduler
 2023-05-29 19:39:35 +03:00
Bananymous
dd3f34cb2c Kernel: Make RecursiveSpinLock thread safe 
also SpinLock is now implemented with gcc builtins
 2023-05-29 19:38:09 +03:00
Bananymous
f964f6be8d Kernel: Move page macros to Types.h 2023-05-28 21:03:08 +03:00
Bananymous
0202ccec5f Kernel: ISR will now crash userspace process instead of panicing kernel 2023-05-28 20:53:10 +03:00
Bananymous
c19f4c019a Kernel: Add invalidate() to MMU 2023-05-28 18:05:49 +03:00
Bananymous
83eb3dc0cb Kernel: fix MMU::map_page_at() 
We used to only reassign if flags changed
 2023-05-28 17:57:05 +03:00
Bananymous
b847d7dfd5 Kernel: MMU::get() is now MMU::kernel 
MMU is can now be locked with RecursiveSpinLock.

Scheduler now has get_current_tid() that works before the Scheduler
is initialized. This allows RecursiveSpinLock usage early on.
 2023-05-28 16:18:18 +03:00
Bananymous
f33e78882e Kernel: Add argc and argv to process entry 2023-05-16 00:27:49 +03:00
Bananymous
31ac3260ed Kernel: MMU keeps track of the current 2023-05-16 00:26:39 +03:00
Bananymous
85039020d3 Kernel: argc is passed as zero to userspace 2023-05-11 18:28:32 +03:00
Bananymous
1cf7ef3de6 Kernel: Remove offset from OpenFileDescriptor 
This is now handled on the libc side. There might be reasons to
have it in kernel side, but for simplicity's sake I'm moving it
to libc for now :)
 2023-05-09 20:31:22 +03:00
Bananymous
812e61ca70 Kernel: Add barebones GeneralAllocator for >4096B 2023-05-08 22:10:49 +03:00
Bananymous
bc35a561d3 Kernel: GDT tss selector is now 16 bit value 2023-05-06 17:34:22 +03:00
Bananymous
06bc807e34 Kernel: MMU can now provide info about virtual address space 2023-05-06 17:34:22 +03:00
Bananymous
6262e41de1 Kernel: ISRs now print pid and tid 2023-05-06 00:10:15 +03:00
Bananymous
0cb53efa01 Kernel: 64 bit MMU now properly identity maps kernel 2023-05-05 14:19:28 +03:00
Bananymous
f139fc2229 Kernel: namespace and function renames 
MMU moved to namespace kernel
Kernel::Memory::Heap moved to just Kernel
MMU::map_{page,range} renamed to identity_map_{page,range}

Add MMU::get_page_flags
 2023-04-28 14:48:38 +03:00
Bananymous
6ecc8cac0e Kernel: TSS stack can be set after initialization 2023-04-25 14:48:12 +03:00
Bananymous
8c1f5bfe1e Kernel: Remove obsolete userspace stuff from kernel 2023-04-22 15:38:45 +03:00
Bananymous
3ad0d2328d Kernel: Don't call 'cli' on interrupt 
This is automatically done because we are using interrupt gates
in the IDT
 2023-04-21 11:18:08 +03:00
Bananymous
be14a6c239 Kernel: Stack pointer is validated when updated 
This allows us not to fail stack pointer when in syscall since
interrupts use their own stack
 2023-04-21 10:40:24 +03:00
Bananymous
3aa0eeb4a3 Kernel: Add barebones per process virtual addresses 
We now assign every (userspace) process its own MMU which we load
in scheduler. This allows every process to have separate virtual
address space.

This is very hackish implementations but it works for now
 2023-04-20 00:45:41 +03:00
Bananymous
b3eeb6412f Kernel: Add some bareboness functionality to map virtual addresses 2023-04-19 23:51:36 +03:00
Bananymous
d38470c8e2 Kernel: Rename MMU::{un,}allocate... to MMU::{un,}map 
This is more appropriate name for the behaviour :D
 2023-04-19 21:50:30 +03:00
Bananymous
2de64b592d Kernel: Kmalloc now has its memory statically allocated 
We don't use the memory map given by bootloader since this automatically
maps the memory to a available space.
 2023-04-18 10:18:15 +03:00
Bananymous
9c0f3dd996 Kernel: Move kmalloc and MMU to Memory directory 2023-04-18 10:18:15 +03:00
Bananymous
fe87c08a02 LibC: add needed stubs to build executables with our compiler 2023-04-12 17:53:02 +03:00
Bananymous
8637959289 Kernel: We can create basic userspace processes 
These are still allocated on the kernel memory
 2023-04-12 17:52:36 +03:00
Bananymous
e704968f96 Kernel: Threads can now be terminated mid execution 2023-04-10 21:07:25 +03:00
Bananymous
641ed23380 Kernel: Fix framepointers on started threads 2023-04-10 21:07:25 +03:00
Bananymous
9f977488fa BuildSystem: cmake can now build out libc 
I can't seem to get libc++ build to work...
 2023-04-10 21:07:25 +03:00