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f1246f84e0
This change finally adds capabilities to handles. Included changes: - j6_handle_t is now again 64 bits, with the highest 8 bits being a type code, and the next highest 24 bits being the capability mask, so that programs can check type/caps without calling the kernel. - The definitions grammar now includes a `capabilities [ ]` section on objects, to list what capabilities are relevant. - j6/caps.h is auto-generated from object capability lists - init_libj6 again sets __handle_self and __handle_sys, this is a bit of a hack. - A new syscall, j6_handle_list, will return the list of existing handles owned by the calling process. - syscall_verify.cpp.cog now actually checks that the needed capabilities exist on handles before allowing the call.
43 lines
1.4 KiB
Modula-2
43 lines
1.4 KiB
Modula-2
import "objects/endpoint.def"
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import "objects/vma.def"
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# The system object represents a handle to kernel functionality
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# needed by drivers and other priviledged services
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object system : kobject {
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uid fa72506a2cf71a30
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capabilities [
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get_log
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bind_irq
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map_phys
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change_iopl
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]
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# Get a log line from the kernel log
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method get_log [cap:get_log] {
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param buffer buffer [out optional] # Buffer for the log message data structure
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}
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# Ask the kernel to send this process messages whenever
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# the given IRQ fires
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method bind_irq [cap:bind_irq] {
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param dest object endpoint # Endpoint that will receive messages
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param irq uint # IRQ number to bind
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}
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# Create a VMA and map an area of physical memory into it,
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# also mapping that VMA into the current process
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method map_phys [cap:map_phys] {
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param area object vma [out] # Receives a handle to the VMA created
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param phys address # The physical address of the area
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param size size # Size of the area, in pages
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param flags uint32 # Flags to apply to the created VMA
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}
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# Request the kernel change the IOPL for this process. The only values
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# that make sense are 0 and 3.
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method request_iopl [cap:change_iopl] {
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param iopl uint # The IOPL to set for this process
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}
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}
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