CeDOS - 41a9a758c784e22cfc1be43c7a2e5aefe0e2a387 (log)

Using new bootloader, added FAT12 structure to execution and made each module self-contained
Celina Kalus
hello@celinakalus.de
Sat, 18 Mar 2023 01:46:06 +0100
Removed some unnecessary code (due to bootloader merge) and cleaned up some now unused variables
Celina Kalus
hello@celinakalus.de
Fri, 17 Mar 2023 22:22:13 +0100
New bootloader works. Size of payload still limited. Fixed link points for kernel and ELF executable
Celina Kalus
hello@celinakalus.de
Fri, 17 Mar 2023 22:12:42 +0100
Added A20 gate enabling
Celina Kalus
hello@celinakalus.de
Fri, 17 Mar 2023 18:53:15 +0100
Removed accidental new file
Celina Kalus
hello@celinakalus.de
Fri, 17 Mar 2023 15:00:55 +0100
Merged bootloader stages
Celina Kalus
hello@celinakalus.de
Fri, 17 Mar 2023 14:06:27 +0100
Added VNC support for emulator
Celina Kalus
hello@celinakalus.de
Fri, 17 Mar 2023 13:08:26 +0100
User stdio now more efficient, using fewer system calls
Celina Kalus
hello@celinakalus.de
Tue, 14 Mar 2023 19:31:39 +0100
Added strcpy, added buffers for process name and args
Celina Kalus
hello@celinakalus.de
Tue, 14 Mar 2023 18:12:20 +0100
Added arguments to processes
Celina Kalus
hello@celinakalus.de
Tue, 14 Mar 2023 17:57:29 +0100
Added very basic file interface for keyboard input and tty output
Celina Kalus
hello@celinakalus.de
Tue, 14 Mar 2023 16:52:40 +0100
Implemented execution of ELF executables
Celina Kalus
hello@celinakalus.de
Thu, 02 Mar 2023 12:18:24 +0100
More flexible API for scheduler
Celina Kalus
hello@celinakalus.de
Wed, 01 Mar 2023 22:12:12 +0100
Added a syscall for print, updated fibonacci app
Celina Kalus
hello@celinakalus.de
Wed, 01 Mar 2023 21:41:45 +0100
Moved sources to separate directory
Celina Kalus
hello@celinakalus.de
Wed, 01 Mar 2023 20:45:50 +0100
Complete overhaul of the makefile structure: Only using one makefile per module instead of recursive make all the way
Celina Kalus
hello@celinakalus.de
Wed, 01 Mar 2023 20:35:59 +0100
Modified makefiles to comply with conventions
Celina Kalus
hello@celinakalus.de
Wed, 01 Mar 2023 15:43:11 +0100
Updated readme with link to cross compilation tutorial and successful cross-compiler builds
Celina Kalus
celina.kalus@rwth-aachen.de
Wed, 01 Mar 2023 14:28:49 +0100
Corrected log file directory in run.sh
Celina Kalus
celina.kalus@rwth-aachen.de
Wed, 01 Mar 2023 14:24:12 +0100
Makefiles: Improved subsystem building (added phony dependencies for boot, kernel and apps), changed logfile folder (debug is an ambiguous name), added -r flag to app building to prevent building an executable file
Celina Kalus
celina.kalus@rwth-aachen.de
Wed, 01 Mar 2023 14:23:31 +0100
Made driver variables extern to avoid multiple definition of symbols (how did it even work before that?)
Celina Kalus
celina.kalus@rwth-aachen.de
Wed, 01 Mar 2023 14:20:12 +0100
Updated gitignore for new log folder name
Celina Kalus
celina.kalus@rwth-aachen.de
Wed, 01 Mar 2023 14:19:08 +0100
Improved Stack Checksums, sched_kill, added test procedure
Celina Sophie Kalus
hello@celinakalus.de
Sat, 27 Jan 2018 16:51:47 +0100
Implemented Program Loader
Celina Sophie Kalus
hello@celinakalus.de
Fri, 26 Jan 2018 23:30:27 +0100
Fixed critical sections
Celina Sophie Kalus
hello@celinakalus.de
Fri, 19 Jan 2018 20:42:14 +0100
Syscall handler modified Now takes actual arguments
Celina Sophie Kalus
hello@celinakalus.de
Fri, 19 Jan 2018 20:16:47 +0100
Implemented low-level keyboard driver
Celina Sophie Kalus
hello@celinakalus.de
Fri, 19 Jan 2018 18:57:57 +0100
Improved Scheduler NOTE: sched_kill not yet fully functional
Celina Sophie Kalus
hello@celinakalus.de
Wed, 17 Jan 2018 23:51:44 +0100
Fixed sched_exec issue, and other things - Implemented stack integrity check - Implemented syscalls The paging subsystem could REALLY need some rework, it's getting REALLY messy
Celina Sophie Kalus
hello@celinakalus.de
Wed, 17 Jan 2018 15:45:24 +0100
All the small things ISSUES: sched_exec does not work when performed inside of a process, unsure why
Celina Sophie Kalus
hello@celinakalus.de
Mon, 15 Jan 2018 00:59:06 +0100
Fixed some things
Celina Sophie Kalus
hello@celinakalus.de
Sun, 14 Jan 2018 00:09:02 +0100
Improved scheduler Process stacks now reside in same virtual memory location.
Celina Sophie Kalus
hello@celinakalus.de
Sat, 13 Jan 2018 23:53:57 +0100
Implemented scheduler TODO: - Implement scheduling strategies. - Move process stacks to predetermined private stacks that overlap each other in virtual memory.
Celina Sophie Kalus
hello@celinakalus.de
Sat, 13 Jan 2018 22:59:11 +0100
Fixed INT 20h issue Turns out I forgot the 0x prefix of the number of IDT entries... So there were 31 entries, which does not include INT 20h. Now there are 0x31 entries, like there should be.
Celina Sophie Kalus
hello@celinakalus.de
Mon, 08 Jan 2018 16:53:42 +0100
blahblah
Celina Sophie Kalus
hello@celinakalus.de
Thu, 04 Jan 2018 21:22:08 +0100
Added process struct and functions
Celina Sophie Kalus
hello@celinakalus.de
Tue, 02 Jan 2018 01:58:19 +0100
Moving memory management into own subdirectory
Celina Sophie Kalus
hello@celinakalus.de
Mon, 01 Jan 2018 21:53:11 +0100
Major reorganization
Celina Sophie Kalus
hello@celinakalus.de
Mon, 01 Jan 2018 21:37:18 +0100
Some code restructuring
Celina Sophie Kalus
hello@celinakalus.de
Sun, 31 Dec 2017 18:51:52 +0100
shenanigans
Celina Sophie Kalus
hello@celinakalus.de
Sun, 31 Dec 2017 16:02:37 +0100
Paging implementation extended Can create new page directories now and map physical address ranges to virtual addresses.
Celina Sophie Kalus
hello@celinakalus.de
Sun, 31 Dec 2017 14:05:33 +0100
PIC driver implemented
Celina Sophie Kalus
hello@celinakalus.de
Wed, 27 Dec 2017 22:38:34 +0100
DON'T INTERRUPT ME Interrupts are implemented, code now requires GCC version 7 or higher. Had to add a hack to make new linker work; bss segment is needed separately for whatever reason. Execution hits a double fault, but that is to be expected - we haven't yet setup the PIC, so the 0x08-interrupt will be fired by a misaligned PIC interrupt
Celina Sophie Kalus
hello@celinakalus.de
Wed, 27 Dec 2017 00:51:39 +0100
Minor changes yet again
Celina Sophie Kalus
hello@celinakalus.de
Mon, 25 Dec 2017 20:56:49 +0100
Renaming kernel files
Celina Sophie Kalus
hello@celinakalus.de
Mon, 25 Dec 2017 19:39:42 +0100
Updated README.md
Celina Sophie Kalus
hello@celinakalus.de
Mon, 25 Dec 2017 19:33:19 +0100
Massively changed makefiles Now, release and debug builds are done in different folders
Celina Sophie Kalus
hello@celinakalus.de
Mon, 25 Dec 2017 19:18:57 +0100
Added A20 check Booting aborts if A20 is disabled
Celina Sophie Kalus
hello@celinakalus.de
Mon, 25 Dec 2017 18:40:52 +0100
Added rudimentary documentation, improved makefile Makefile now handles input files more flexibly, so no makefile change is necessary when adding a new file
Celina Sophie Kalus
hello@celinakalus.de
Mon, 25 Dec 2017 18:06:41 +0100
Added page allocator
Celina Sophie Kalus
hello@celinakalus.de
Sun, 24 Dec 2017 16:57:59 +0100
Added cursor, added backspace
Celina Sophie Kalus
hello@celinakalus.de
Sun, 24 Dec 2017 15:11:13 +0100
Minor things again
Celina Sophie Kalus
hello@celinakalus.de
Sun, 24 Dec 2017 12:02:58 +0100
Minor changes
Celina Sophie Kalus
hello@celinakalus.de
Sun, 24 Dec 2017 00:51:21 +0100
Paging works nvm everything i said
Celina Sophie Kalus
hello@celinakalus.de
Sat, 23 Dec 2017 23:53:54 +0100
Added paging implementation This doesn't execute, it produces a triple fault when far jumping to kernel code. Not sure why
Celina Sophie Kalus
hello@celinakalus.de
Sat, 23 Dec 2017 23:43:01 +0100
Updated second stage Added simple print and clear methods for second stage
Celina Sophie Kalus
hello@celinakalus.de
Thu, 21 Dec 2017 23:22:00 +0100
Added method to copy kernel Doesn't work yet, probably because of A20 gate
Celina Sophie Kalus
hello@celinakalus.de
Thu, 21 Dec 2017 23:07:31 +0100
Protected Mode bug fix Jump to protected mode now successful. Turns out the GDT descriptor had its arguments in wrong order.
Celina Sophie Kalus
hello@celinakalus.de
Sun, 17 Dec 2017 01:32:48 +0100
.gitignore & makefile update
Celina Sophie Kalus
hello@celinakalus.de
Sun, 17 Dec 2017 00:03:11 +0100
GDT added, some workflow changes OS currently jumps into protected mode before the prerequisites are set, so execution fails
Celina Sophie Kalus
hello@celinakalus.de
Sat, 16 Dec 2017 18:36:29 +0100
Second stage bootloader implemented Very whacky implementation of a bios-driven floppy "driver"
Celina Sophie Kalus
hello@celinakalus.de
Fri, 15 Dec 2017 23:48:31 +0100
Workflow changes Recursive Makefiles added to support multiple, independent project parts
Celina Sophie Kalus
hello@celinakalus.de
Fri, 15 Dec 2017 22:17:16 +0100
Update makefile Added 'rebuild' recipe, more sophisticated 'clear'
Celina Sophie Kalus
hello@celinakalus.de
Fri, 15 Dec 2017 00:04:55 +0100
Create README.md
Celina Sophie Kalus
hello@celinakalus.de
Thu, 14 Dec 2017 23:55:59 +0100
Hello World!
Celina Sophie Kalus
hello@celinakalus.de
Thu, 14 Dec 2017 23:46:15 +0100