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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.
38 lines
983 B
Modula-2
38 lines
983 B
Modula-2
# Channels are objects that enable synchronous IPC of
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# arbitrary-sized messages.
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object endpoint : kobject {
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uid c5882f24a4c03b7e
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capabilities [
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send
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receive
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]
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method create [constructor]
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# Send a message on a channel. Blocks until the message
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# is received.
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method send [cap:send] {
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param tag uint64
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param data buffer
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}
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# Receieve a message on a channel. Blocks until a message
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# is available.
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method receive [cap:receive] {
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param tag uint64 [out]
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param data buffer [out optional]
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param timeout uint64 # Receive timeout in nanoseconds
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}
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# Send a message on a channel and then await a new message.
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# Equivalent to calling send and then recieve, as a single
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# operation.
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method sendrecv [cap:send cap:receive] {
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param tag uint64 [inout]
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param data buffer [inout]
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param timeout uint64 # Receive timeout in nanoseconds
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}
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}
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