Benji Dial
e8c6577617
big kernel additions: paging, elf loading, separate kernel and user page allocation it now properly loads and runs sd0:bin/init.elf still need to determine which disk was booted from, and start the init on that disk
32 lines
No EOL
1.4 KiB
Text
32 lines
No EOL
1.4 KiB
Text
quit task is int 0x38
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yield task is int 0x39
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eax is cleared on yield
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syscall is int 0x30
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system call number in eax
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args in ebx, ecx, edx, esi, edi
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result in eax
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note: do not assume eax is unmodified if there is no value to be returned
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modifies ecx, edx
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file system calls have units of bytes unless otherwise specified
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functions returning handles or pointers use 0 to indicate error
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functions returning "success" use 1 for success and 0 for failure
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see keys.txt for the return type of the "get key" system call
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invalid system call numbers change eax to -1, and have no other effect.
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function | eax | eax out | ebx | ecx | edx | esi | edi
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---------------|-----|---------------|---------------|-------------|-------|--------|-----
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open file | 0x0 | handle | drive number | path | | |
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close file | 0x1 | | handle | | | |
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file read | 0x2 | read | handle | file offset | count | buffer |
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get file size | 0x3 | size | handle | | | |
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start task | 0x4 | success | drive number | path | | |
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log string | 0x5 | | sz string | | | |
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get key | 0x6 | keycode | | | | |
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allocate ram | 0x7 | start pointer | pages | | | | |