Bananymous
120f7329b1
BAN: Update ASSERT api
...
its now much harder to mix < with <= and > with >=
2023-11-02 00:01:12 +02:00
Bananymous
4f25c20c97
Kernel: Canonicalize vaddr before using it
2023-10-30 19:20:17 +02:00
Bananymous
3bac19e518
Kernel: Add fast page to page table
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Add "fast page" to KERNEL_OFFSET. This is always present in page
tables and only requires changing the page table entry to map. This
requires no interrupts since it should only be for very operations
like memcpy.
I used to map all temporary mappings to vaddr 0, but this is much
better. C++ standard always says that nullptr access is undefined
and this gets rid of it.
Fixed some bugs I found along the way
2023-10-30 19:02:09 +02:00
Bananymous
26c7aee327
Kernel: only map kernel from g_kernel_start onwards
2023-10-30 16:22:02 +02:00
Bananymous
8a10853ba7
Kernel: Enable Write Protect. This seems to be good for security
2023-10-30 12:23:22 +02:00
Bananymous
e2e5c31d54
Kernel: Map multiboot2 memory in PageTable initialization
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It cannot be assumed that multiboot data lies between kernel_end
and 2 GiB mark, so I properly allocate virtual address space for it.
2023-10-17 01:15:08 +03:00
Bananymous
be3efb0b92
Kernel: Start using multiboot2 instead of multiboot
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This allows better compatibility with (U)EFI and gives RSDP location
instead of me having to scan ram to find it.
2023-10-17 01:06:24 +03:00
bc1087f5a7
Kernel: Add pointer validation API to page table
2023-09-22 17:20:35 +03:00
720bc418a6
All: Clear lines with only whitspace in them
2023-09-10 00:31:42 +03:00
008c777a9f
Kernel: Add PageTable::Flags::CacheDisable
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Also fix multiple places where we were using uint8_t as page table
flags instead of PageTable::flags_t which we promoted to uint16_t
while back.
2023-08-06 23:59:30 +03:00
91f04ce250
Kernel: Change PageTable API
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Getting free pages not reserves them, so you don't have to hold
the page table lock :)
2023-08-02 22:09:14 +03:00
926df2b276
Kernel: PageTable now supports reserved pages
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You can now map pages as reserved, so that they will not be given
from get_free_page() or get_free_contiguous_pages().
2023-08-01 16:35:54 +03:00
dcd4d0daeb
Kernel/LibC: Add bareboness signals
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You can now call raise() to raise a signal. Signal handlers are
not yet supported, but the handling works :)
2023-07-21 15:45:02 +03:00
faf4220b38
Kernel: kernel memory takes now full pml4e
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This allows flags to work properly
2023-07-21 13:47:05 +03:00
193ddaa2f6
Kernel: remove PAGE_FLAGS_MASK as that was not correct anymore
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After I added NXE bit, the flags mask is no longer valid
2023-07-21 12:01:50 +03:00
46eb27883a
Kernel: Don't map kernel executable memory as writable
2023-07-21 11:17:39 +03:00
ba9fa00947
Kernel: fix memory leak in PageTable
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PageTable used to leak 2 pages on creation and other two on deletion
2023-07-19 23:17:39 +03:00
6c1ada8d0a
Kernel: Enable global bit on kernel pages
2023-07-13 15:23:25 +03:00
7d00c2670f
Kernel: Support execute disable bit
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We will now map executable memory explicitly as executable.
2023-07-13 14:28:53 +03:00
86df258365
Kernel: rework the whole PageTable structure
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We now have page table structure for kernel memory which is shared
between all processes.
2023-07-05 23:41:35 +03:00
5e123031aa
Kernel: kmalloc has now somewhat dynamic storage
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Allocations bigger than PAGE_SIZE and those not forced to be identity
mapped are now done on a GeneralAllocator. This allows us to use kmalloc
for big allocations; bigger than the fixed 1 MiB storage.
This is still a hack and the whole kmalloc will have to be rewritten at
some point, but for now this does the job :D
2023-06-18 23:27:00 +03:00
2b9900e56e
Kernel: get_free_contiguous_pages works with non-page aligned addresses
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also fix bug in ordering
2023-06-06 02:03:23 +03:00
8352392b38
Kernel: You can specify first vaddr for getting free pages
2023-06-04 01:15:48 +03:00
9f75d9cfe5
Kernel: PageTable now has debug_dump
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This dumps all the mapped pages and their flags
2023-06-03 20:08:13 +03:00
8175348284
Kernel: Fix comment
2023-05-31 00:51:15 +03:00
b2832cb47a
Kernel: PageTable destructor works now
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we are successfully booting higher half kernel now :)
2023-05-31 00:44:14 +03:00
9f499991c8
Kernel: PageTable::create_userspace() now works
2023-05-31 00:44:14 +03:00
ed0dcacab3
Kernel: Move V2P and P2V to Memory/Types.h
2023-05-30 23:57:03 +03:00
e86050f343
Kernel: PageTable::map_range_at maps correctly the last page
2023-05-30 23:56:07 +03:00
57f7da6ce1
Kernel: Booting with higher half kernel gets to Heap initialization
2023-05-30 22:21:12 +03:00
93e6455171
Kernel: start work on higher half kernel
2023-05-30 08:00:17 +03:00
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
Bananymous