142 lines
5.5 KiB
Fennel
142 lines
5.5 KiB
Fennel
(local util (require :lib.util))
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(local {: spawn : kill} (util.require :lib.spawn))
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(local nrepl (require :link.nrepl))
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(local Session (require :link.nrepl-session))
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(local bencode (require :lib.bencode))
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(local lume (require :lib.lume))
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(fn current-pluginspath []
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(local f (io.popen "mame -showconfig" :r))
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(var pluginspath "")
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(each [line (f:lines)]
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(local path (line:match "pluginspath%s+(.*)"))
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(when path (set pluginspath path)))
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pluginspath)
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(local pluginspath (.. (current-pluginspath) ";" (love.filesystem.getWorkingDirectory) "/support/mame"))
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(fn start-mame [platform]
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(spawn [:mame :-debug :-plugins :-pluginspath pluginspath :-plugin :jeejah platform]))
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(local Machine (Session:extend))
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(fn Machine.new [self]
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(Machine.super.new self {:out (fn []) :value (fn [])})
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(set self.breakpoints {}))
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(fn Machine.boot [self]
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(when (not self.pid)
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(set self.pid (start-mame :apple2p))))
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(fn Machine.run [self]
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(self:boot)
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(self:connect))
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(fn Machine.die [self]
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(self:disconnect)
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(when self.pid
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(kill (- self.pid) 1)
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(set self.pid nil)))
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(fn Machine.running? [self] self.pid)
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(fn Machine.connected? [self] self.session)
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(fn Machine.connect [self]
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(util.in-coro (fn []
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(when (not (nrepl:connected?))
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(util.waitfor
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#(if (nrepl:connected?) true
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(do (pcall #(nrepl:connect)) false))))
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(self:init-session))))
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(fn Machine.init-session [self]
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(Machine.super.init-session self)
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(set self.monitor (Session {:out (fn []) :value (fn [])}))
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(self.monitor:init-session)
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(self.monitor:eval
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"(global periodic-jobs {})
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(emu.register_periodic (fn []
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(local dead-ids [])
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(each [id coro (pairs periodic-jobs)]
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(coroutine.resume coro)
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(when (= (coroutine.status coro) :dead)
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(table.insert dead-ids id)))
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(each [_ id (ipairs dead-ids)]
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(tset periodic-jobs id nil))))
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(global run-periodic-job (fn [id f]
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(tset periodic-jobs id (coroutine.running))
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(f)
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(tset periodic-jobs id nil)))")
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(self:start-cpu-monitor)
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(self:continue) ; debug mame starts paused
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(self:done-msg))
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(fn Machine.start-cpu-monitor [self ?last-addr]
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(self.monitor:eval-input
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"(let [?last-addr (tonumber (io.read))]
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(run-periodic-job :cpu-monitor (fn []
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(var last-addr ?last-addr)
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(while (let [state (-> (manager:machine) (: :debugger) (. :execution_state))
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addr (-> (manager:machine) (. :devices ::maincpu :state :PC :value))]
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(not (and (= state :stop) (not= addr ?last-addr))))
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(when (= :run (-> (manager:machine) (: :debugger) (. :execution_state)))
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(set last-addr nil))
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(coroutine.yield))))
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(-> (manager:machine) (. :devices ::maincpu :state :PC :value)))"
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(tostring ?last-addr)
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{:value (fn [nrepl output response]
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(self:on-cpu-paused (tonumber output))
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(self:start-cpu-monitor (tonumber output)))}))
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(fn Machine.on-cpu-paused [self addr]
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(local action (-?> self.breakpoints (. addr) (. :action)))
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(when action (action)))
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(fn Machine.disconnect [self]
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(self:shutdown-session)
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(when self.monitor (self.monitor:shutdown-session))
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(when (nrepl:connected?) (nrepl:disconnect))
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(set self.breakpoints {}))
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(fn Machine.write [self addr bytes]
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(self:eval-input
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"(let [bencode (require :bencode)
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{: addr : bytes} (bencode.decode (io.read))
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mem (-> (manager:machine) (. :devices ::maincpu :spaces :program))]
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(print :writing (bytes:len) :to addr)
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(for [i 1 (bytes:len)]
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(mem:write_u8 (+ addr i -1) (string.byte (bytes:sub i i)))))"
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(bencode.encode {: addr : bytes})))
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(fn Machine.launch [self prg]
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(self:eval "(: (manager:machine) :soft_reset)")
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(self:eval (string.format "(emu.keypost \"CALL-151\\n %xG\\n\")" (prg:lookup-addr prg.start-symbol))))
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(fn Machine.reboot [self] (self:eval "(: (manager:machine) :hard_reset)"))
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(fn Machine.coro-eval [self code]
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(var result nil)
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(local append-to-result #(set result (.. (or result "") $2)))
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(self:eval code
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(self:coro-handlers (coroutine.running) {:value append-to-result :out append-to-result}))
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(coroutine.yield)
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(or result "<no result>"))
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(fn Machine.dbgcmd [self cmd ?handlers]
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(self:eval (.. "(-> (manager:machine) (: :debugger) (: :command \"" cmd "\"))")) ?handlers)
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(fn Machine.continue [self] (self:dbgcmd :go))
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(fn Machine.step [self] (self:dbgcmd :s))
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(fn Machine.set-bp [self addr ?action]
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; todo: handle setting the same breakpoint more than once?
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(tset self.breakpoints addr {:action ?action})
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(self:eval (.. "(-> (manager:machine) (. :devices ::maincpu) (: :debug) (: :bpset " (tostring addr) "))")
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{:value #(tset (. self.breakpoints addr) :id (tonumber $2))}))
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(fn Machine.clear-bp [self addr]
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(local bpid (-?> self.breakpoints (. addr) (. :id)))
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(when bpid (self:dbgcmd (.. "bpclear " (string.format "%x" bpid))))
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(tset self.breakpoints addr nil))
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(fn Machine.jump [self addr]
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(self:eval (.. "(tset (-> (manager:machine) (. :devices ::maincpu :state :PC)) :value " (tostring addr) ")")))
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(fn Machine.stub [self org post-check-jump ...]
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(org:append :debug-stub [:jmp post-check-jump] :on-hotswap ...))
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(fn Machine.hotswap [self prg-old prg-new]
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(local addr (prg-old:lookup-addr :debug-stub))
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(self:set-bp addr
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(fn [] (self:clear-bp addr)
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(prg-new:upload self)
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(self:jump (prg-new:lookup-addr :on-hotswap))
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(self:continue))))
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(fn Machine.overlay [self prg-overlay]
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(self:step)
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(prg-overlay:upload self)
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(self:continue))
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(Machine:new)
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Machine
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