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bacedbea86
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Rewrote physical memory allocator
The physical memory allocator now uses a buddy allocator instead of a stack.
Also moved some of the platform-independent context code to kernel.c.
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2022-08-23 13:00:26 -05:00 |
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54e2beefc1
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Fixed warning in syscall.c
Cast NULL to 'unsigned long' to get rid of compiler warning.
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2022-08-23 12:58:28 -05:00 |
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2f7d39e679
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Improved error handling in queue.c
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2022-08-23 12:56:45 -05:00 |
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9c37167c5e
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Changed #include guards in physaddr.h, added now error codes
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2022-08-23 12:55:39 -05:00 |
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f76b8cab43
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Changed #include guards in physaddr.h
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2022-08-23 12:55:07 -05:00 |
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2cc9c6942e
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Fixed call to __builtin_clz()
ilog2() erroneously called __builtin_clzl() instead of __builtin_clz()
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2022-08-23 08:46:34 -05:00 |
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b8cec93721
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Put 'math.c' into Makefile.am
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2022-08-23 08:42:59 -05:00 |
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21509be9bc
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Added 'math.c' for optimized math and bit operations
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2022-08-23 08:41:53 -05:00 |
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c36f65ce97
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Various renaming and refactoring
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2022-08-19 22:34:45 -05:00 |
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0337fca749
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Moved syscall IDs to separate header
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2022-08-19 06:06:48 -05:00 |
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164fb9fcae
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Added simple IPC syscalls
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2022-08-19 03:56:53 -05:00 |
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Nathan Giddings
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9c82a39097
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Merge pull request #8 from ngiddings/master
Merge latest work
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2022-08-17 18:25:25 -05:00 |
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0ae4f7995d
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Added basic IPC syscalls
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2022-08-17 02:47:41 -05:00 |
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bfb56fcbb3
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Added functions to portably manipulate process context
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2022-08-17 01:41:59 -05:00 |
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bbf2325a60
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Added constructor to queue
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2022-08-17 01:41:19 -05:00 |
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5b959c9763
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Added queue structure
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2022-08-15 20:20:31 -05:00 |
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bdb0b753a3
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Fixed multiple definition error
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2022-07-23 04:03:00 -05:00 |
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03968c33eb
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Redefined message struct
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2022-07-23 02:22:18 -05:00 |
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d84c9c86d0
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Removed some unused code
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2022-07-05 18:06:19 -05:00 |
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958b717751
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Fixed state save after process preemption
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2022-07-05 15:19:20 -05:00 |
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d4b36a7c7d
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Return the previous process to queue after context switch
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2022-07-05 15:18:51 -05:00 |
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5c7d002bbf
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Moved PCB for each process to kernel heap
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2022-07-03 13:17:06 -05:00 |
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e3026b2601
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Removed unneeded #include from elf.h
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2022-06-15 16:07:01 -05:00 |
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38d9ee4737
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Removed unneeded #include from heap.h
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2022-06-15 16:05:40 -05:00 |
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Nathan Giddings
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da04d019c6
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Merge pull request #7 from ngiddings/pre-alpha
Latest development on pre-alpha
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2022-06-15 16:03:06 -05:00 |
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a52f06f81e
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Massive backlog of changes
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2022-06-15 15:59:31 -05:00 |
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c962a83ff0
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WIP on kernel syscalls
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2021-05-01 17:09:50 -05:00 |
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7caf49065d
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page stack constructor takes stack base as argument
initialize() calls new constructors and fills in syscall table
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2021-04-19 06:58:02 -05:00 |
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8605f08405
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Changed DPL of syscall interrupt to 3
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2021-04-19 06:57:05 -05:00 |
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a68503538b
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putc() advances lines when screen is full
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2021-04-19 06:56:49 -05:00 |
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c5ca5e82a7
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Added more status codes
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2021-04-19 06:56:12 -05:00 |
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7300b9ecd6
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Fixed broken ELF loader
Only binaries less than a page long would load correctly.
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2021-04-19 06:56:03 -05:00 |
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470e39e8e8
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Added support for page types in mmgr
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2021-04-19 06:55:27 -05:00 |
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a5e9d852ab
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Implemented do_syscall()
Wrote constructor for kernel state
Added syscall table
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2021-04-19 06:54:34 -05:00 |
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755f2a3d69
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Wrote syscall interrupt handler in assembly
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2021-04-19 06:53:39 -05:00 |
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0af53bcfc8
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Moved config.h to include/
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2021-04-19 06:52:02 -05:00 |
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6df3f203b8
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Added source file for syscalls
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2021-04-19 06:51:48 -05:00 |
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Nathan Giddings
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6b73aff3d0
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Merge pull request #6 from ngiddings/pre-alpha
Pre alpha
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2021-04-19 03:42:05 -05:00 |
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5efc389935
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Finished basic task switching mechansim
PCB is local to a process's address space.
Context switches are written in assembly.
Moved x86 headers to include/x86
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2021-04-19 03:40:33 -05:00 |
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086dfe546a
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GRUB config file loads modules at boot
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2021-04-18 08:00:56 -05:00 |
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40da57e233
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APIC enabled after running kernel state constructors
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2021-04-18 02:10:56 -05:00 |
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625bbb04a8
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Debug message printed before loading task context
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2021-04-18 02:10:33 -05:00 |
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c39cbb79cd
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Task contexts now load segment registers correctly
Interrupt enable bit set in saved EFLAGS register
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2021-04-18 02:10:03 -05:00 |
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1171aa2ca3
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Spurious interrupt vector set to 0xFF
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2021-04-18 02:07:45 -05:00 |
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0b84658a61
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TSS is created and TR loaded in initialize_gdt()
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2021-04-18 02:07:00 -05:00 |
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979344e942
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next_process() checks if a next process exists
Panics if not
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2021-04-17 06:30:00 -05:00 |
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b615a8d286
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More process in initialize()
Function now constructs kernel state and enters a process
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2021-04-17 06:27:55 -05:00 |
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461194fdfd
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Fixed initialize_context()
Function did not take 'popal' instruction into account when initializing stack
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2021-04-17 06:26:56 -05:00 |
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a68a4dff11
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Added new 'null pointer' status code
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2021-04-17 06:26:03 -05:00 |
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7dd19d0c2a
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Added constructors for heap and resource table
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2021-04-17 06:25:46 -05:00 |
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