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25301a8bbc
* run type prop on gstring * add types-h * new settings * cmake switch * down to 4 failing functions * clang format
132 lines
4.2 KiB
Common Lisp
132 lines
4.2 KiB
Common Lisp
;;-*-Lisp-*-
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(in-package goal)
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;; name: pskernel.gc
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;; name in dgo: pskernel
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;; dgos: KERNEL
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#|
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pskernel.gc contains a bunch of utilities for poking around the PS2's kernel.
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These are unused in the retail game, and wouldn't be "safe" to use on a retail console,
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as later console revisions may have different memory layout of the BIOS. I suspect this
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was used for the purposes of debugging and handling crashes.
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They took over syscall 102 to access memory inside the kernel.
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There's an error message:
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"I CANNOT CONTINUE TO LOAD GOAL, BECAUSE THE KERNEL VERSION HAS CHANGED~%"
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"~%Alternatively, try removing pskernel.gc and debug-handlers.gc from project.cl, do an (lg) and then (:r) again~%"
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My theory is that debug-handlers.gc held crash handlers, and on load would install them using functions defined in pskernel.gc.
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In the retail game, they removed debug-handlers, but not pskernel.
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In the PC port, all of these functions are just stubs.
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|#
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;; map of the kernel's memory.
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(deftype lowmemmap (structure)
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((irq-info-stack uint32 :offset-assert 0)
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(irq2-info-stack uint32 :offset-assert 4)
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(kernel-copy-fn uint32 :offset-assert 8)
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(kernel-write-fn uint32 :offset-assert 12)
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(r1-save uint128 :offset-assert 16)
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(last-time uint32 :offset-assert 32)
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(high-time uint32 :offset-assert 36)
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(dma-status uint32 :offset-assert 40)
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(dma-qnext uint32 :offset-assert 44)
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(dma-qwc uint32 :offset-assert 48)
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(dma-tnext uint32 :offset-assert 52)
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(dma-stack0 uint32 :offset-assert 56)
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(dma-stack1 uint32 :offset-assert 60)
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(kernel-read-fn uint32 :offset-assert 64)
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)
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:method-count-assert 9
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:size-assert #x44
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:flag-assert #x900000044
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)
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(defmacro nyi-break (name)
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`(begin
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(format 0 "~A is not implemented!~%" (quote ,name))
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(break)
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(none)
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)
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)
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(defun kernel-copy-function (unused source dest size)
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"Copy size words from source to dest. The a0 argument is ignored.
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Uses registers a0, a1, a2, a3"
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(nyi-break kernel-copy-function)
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)
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(defun kernel-copy-to-kernel-ram ()
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"Does a syscall 102. This is CpuConfig on released PS2 BIOSes.
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I'm guessing this somehow calls kernel-copy-function"
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(nyi-break kernel-copy-to-kernel-ram)
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)
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(defun kernel-write-function (unused source dest)
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"Writes a single word to the destination"
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(nyi-break kernel-write-function)
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)
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(defun kernel-write ()
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"Does a syscall 102. I'm guessing this somehow calls kernel-write-function."
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(nyi-break kernel-write)
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)
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(defun kernel-read-function (unused source)
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"Read a single word (signed) from source"
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(nyi-break kernel-read-function)
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)
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(defun kernel-read ()
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"Does a syscall 102. I'm guessing this somehow calls kernel-read-function"
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(nyi-break kernel-read)
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)
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(defun kernel-check-hardwired-addresses ()
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"Checks a bunch of stuff in the kernel using kernel-read.
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If the memory layout isn't what it expects, it prints an error and crashes."
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(nyi-break kernel-check-hardwired-addresses)
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)
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(defun install-default-debug-handler (handler)
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"Installs the given handler as the debug handler 1 through 13.
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Uses the install-debug-handler function defined in kmachine.cpp"
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(nyi-break install-default-debug-handler)
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)
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(defun return-from-exception (regs)
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"Restore the registers and eret."
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(nyi-break return-from-exception)
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)
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(defun kernel-set-exception-vector ()
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"Use syscall 13/syscall 14 to set exception handlers"
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(nyi-break kernel-set-exception-vector)
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)
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(defun kernel-set-interrupt-vector ()
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"Use syscall 15 to set an interrupt handler"
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(nyi-break kernel-set-interrupt-vector)
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)
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(defun kernel-set-level2-vector ()
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"Set some handler by writing directly to kernel memory. Not sure what this is."
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(nyi-break kernel-set-level2-vector)
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)
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(defun deinstall-debug-handler ()
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"Set the kernel exception handler back to the default?"
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(nyi-break deinstall-debug-handler)
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)
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(defun deinstall-debug-handlers ()
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"Set a bunch of excpetion handlers back to the default?"
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(nyi-break deinstall-debug-handlers)
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)
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(defun resend-exception ()
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"I think this was to return from a GOAL crash handler back to the EE kernel's crash handler."
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(nyi-break resend-exception)
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) |