honeylisp/link/gsplus.fnl

133 lines
3.8 KiB
Fennel

(local command (require :core.command))
(local {: spawn : kill } (require :lib.spawn))
(local socket (require :socket))
(local json (require :lib.dkjson))
(local asm (require :asm.asm))
(local lume (require :lib.lume))
(local gsplus-path "/home/jeremy/src/gsplus/result/bin/GSplus")
(local debug-port 8769)
(local reg-write-format {
:PC " k%06X"
:A " a%04X"
:X " x%04X"
:Y " y%04X"
:S " s%04X"
:D " d%04X"
:B " b%02X"
:PSR " p%06X"
})
(fn get-cpu-reg [response]
(-> response
(lume.filter #(= $1.type :cpu))
(. 1 :data)))
(local machine
{:boot
(fn [self]
(when (not self.pid)
(set self.pid (spawn [:nixGL gsplus-path :-debugport (tostring debug-port)]))))
:run
(fn [self]
(self:boot)
(while (not self.socket) (self:connect))
(self:hello))
:die
(fn [self]
(self:disconnect)
(when self.pid
(kill (- self.pid) 1)
(set self.pid nil)))
:connect
(fn [self]
(when (not self.socket)
(set self.socket (socket.connect :localhost debug-port))
(if self.socket
(self.socket:settimeout 1)
(love.timer.sleep 0.25))))
:disconnect
(fn [self]
(when self.socket
(self.socket:close)
(set self.socket nil)))
:connected? (fn [self] self.socket)
:running? (fn [self] self.pid)
:cmd (fn [self cmd] (self.socket:send (.. cmd "\n")))
:response
(fn [self]
(var bytes "")
(var done false)
(while (not done)
(local (line err) (self.socket:receive))
(set done (or (= line "") (= line nil)))
(when line (set bytes (.. bytes line))))
(json.decode bytes))
:cmd-response (fn [self cmd] (self:cmd cmd) (self:response))
:hello (fn [self] (self:cmd-response "1"))
:continue (fn [self] (self:cmd "3"))
:step (fn [self] (self:cmd-response "2"))
:getreg (fn [self] (get-cpu-reg (self:cmd-response "4")))
:set-bp (fn [self addr] (self:cmd-response (.. "8" (string.format "%06X" addr))))
:delete-bp (fn [self addr] (self:cmd-response (.. "9" (string.format "%06X" addr))))
:get-bp (fn [self] (self:cmd-response "A"))
:write
(fn [self addr bytes]
(var bytes-to-write bytes)
(var addrout addr)
(while (> (length bytes-to-write) 0)
(local bytesout (bytes-to-write:sub 1 50))
(self:cmd-response (.. "7" (string.format "%06X" addrout) (bytesout:tohex)))
(set bytes-to-write (bytes-to-write:sub 51))
(set addrout (+ addrout 50))))
:setreg
(fn [self regvals]
(var bytes "5")
(each [reg val (pairs regvals)]
(set bytes (.. bytes (string.format (. reg-write-format reg) val))))
(self:cmd-response bytes))
:stop-at
(fn [self addr k]
(local fulladdr (bit.bor addr (bit.lshift (or k 0) 16)))
(self:set-bp fulladdr)
; wait for breakpoint to be hit
(var bp-response (self:response))
(self:delete-bp fulladdr)
(when (not bp-response)
; attempt to consume extra response in case the breakpoint was actually hit while sending the message to delete the breakpoint
(set bp-response (self:response)))
(when bp-response
(local reg (get-cpu-reg bp-response))
(local pc (tonumber reg.PC 16))
(local curr-k (tonumber reg.K 16))
(and (= pc addr) (= curr-k (or k 0)))))
:jump (fn [self addr] (self:setreg {:PC addr}))
:do
(fn [self prg f]
(when (self:stop-at (prg:lookup-addr :debug-stub))
(f self)
(self:continue)
true))
:hotswap
(fn [self prg-old prg-new]
(self:do prg-old
(fn []
(prg-new:upload self)
; on-hotswap may move around in memory; we can handle this
(self:jump (prg-new:lookup-addr :on-hotswap)))))
:stub
(fn [self org post-check-jump ...]
(org:append :debug-stub [:jmp post-check-jump] :on-hotswap ...))
})
(command.add (fn [] machine.socket) {
"gsplus:hello" #(machine:hello)
"gsplus:dump-cpu-state" #(pp (machine:getreg))
"gsplus:step" #(pp (machine:step))
"gsplus:continue" #(pp (machine:continue))
})
machine