1167 lines
34 KiB
Lua
1167 lines
34 KiB
Lua
------------------------------------------------------------------------------
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-- DynASM ARM64 module.
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--
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-- Copyright (C) 2005-2016 Mike Pall. All rights reserved.
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-- See dynasm.lua for full copyright notice.
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------------------------------------------------------------------------------
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-- Module information:
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local _info = {
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arch = "arm",
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description = "DynASM ARM64 module",
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version = "1.4.0",
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vernum = 10400,
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release = "2015-10-18",
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author = "Mike Pall",
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license = "MIT",
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}
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-- Exported glue functions for the arch-specific module.
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local _M = { _info = _info }
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-- Cache library functions.
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local type, tonumber, pairs, ipairs = type, tonumber, pairs, ipairs
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local assert, setmetatable, rawget = assert, setmetatable, rawget
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local _s = string
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local sub, format, byte, char = _s.sub, _s.format, _s.byte, _s.char
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local match, gmatch, gsub = _s.match, _s.gmatch, _s.gsub
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local concat, sort, insert = table.concat, table.sort, table.insert
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local bit = bit or require("bit")
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local band, shl, shr, sar = bit.band, bit.lshift, bit.rshift, bit.arshift
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local ror, tohex = bit.ror, bit.tohex
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-- Inherited tables and callbacks.
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local g_opt, g_arch
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local wline, werror, wfatal, wwarn
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-- Action name list.
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-- CHECK: Keep this in sync with the C code!
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local action_names = {
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"STOP", "SECTION", "ESC", "REL_EXT",
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"ALIGN", "REL_LG", "LABEL_LG",
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"REL_PC", "LABEL_PC", "IMM", "IMM6", "IMM12", "IMM13W", "IMM13X", "IMML",
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}
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-- Maximum number of section buffer positions for dasm_put().
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-- CHECK: Keep this in sync with the C code!
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local maxsecpos = 25 -- Keep this low, to avoid excessively long C lines.
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-- Action name -> action number.
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local map_action = {}
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for n,name in ipairs(action_names) do
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map_action[name] = n-1
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end
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-- Action list buffer.
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local actlist = {}
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-- Argument list for next dasm_put(). Start with offset 0 into action list.
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local actargs = { 0 }
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-- Current number of section buffer positions for dasm_put().
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local secpos = 1
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------------------------------------------------------------------------------
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-- Dump action names and numbers.
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local function dumpactions(out)
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out:write("DynASM encoding engine action codes:\n")
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for n,name in ipairs(action_names) do
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local num = map_action[name]
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out:write(format(" %-10s %02X %d\n", name, num, num))
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end
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out:write("\n")
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end
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-- Write action list buffer as a huge static C array.
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local function writeactions(out, name)
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local nn = #actlist
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if nn == 0 then nn = 1; actlist[0] = map_action.STOP end
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out:write("static const unsigned int ", name, "[", nn, "] = {\n")
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for i = 1,nn-1 do
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assert(out:write("0x", tohex(actlist[i]), ",\n"))
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end
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assert(out:write("0x", tohex(actlist[nn]), "\n};\n\n"))
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end
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------------------------------------------------------------------------------
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-- Add word to action list.
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local function wputxw(n)
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assert(n >= 0 and n <= 0xffffffff and n % 1 == 0, "word out of range")
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actlist[#actlist+1] = n
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end
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-- Add action to list with optional arg. Advance buffer pos, too.
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local function waction(action, val, a, num)
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local w = assert(map_action[action], "bad action name `"..action.."'")
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wputxw(w * 0x10000 + (val or 0))
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if a then actargs[#actargs+1] = a end
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if a or num then secpos = secpos + (num or 1) end
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end
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-- Flush action list (intervening C code or buffer pos overflow).
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local function wflush(term)
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if #actlist == actargs[1] then return end -- Nothing to flush.
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if not term then waction("STOP") end -- Terminate action list.
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wline(format("dasm_put(Dst, %s);", concat(actargs, ", ")), true)
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actargs = { #actlist } -- Actionlist offset is 1st arg to next dasm_put().
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secpos = 1 -- The actionlist offset occupies a buffer position, too.
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end
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-- Put escaped word.
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local function wputw(n)
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if n <= 0x000fffff then waction("ESC") end
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wputxw(n)
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end
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-- Reserve position for word.
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local function wpos()
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local pos = #actlist+1
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actlist[pos] = ""
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return pos
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end
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-- Store word to reserved position.
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local function wputpos(pos, n)
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assert(n >= 0 and n <= 0xffffffff and n % 1 == 0, "word out of range")
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if n <= 0x000fffff then
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insert(actlist, pos+1, n)
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n = map_action.ESC * 0x10000
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end
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actlist[pos] = n
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end
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------------------------------------------------------------------------------
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-- Global label name -> global label number. With auto assignment on 1st use.
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local next_global = 20
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local map_global = setmetatable({}, { __index = function(t, name)
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if not match(name, "^[%a_][%w_]*$") then werror("bad global label") end
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local n = next_global
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if n > 2047 then werror("too many global labels") end
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next_global = n + 1
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t[name] = n
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return n
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end})
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-- Dump global labels.
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local function dumpglobals(out, lvl)
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local t = {}
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for name, n in pairs(map_global) do t[n] = name end
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out:write("Global labels:\n")
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for i=20,next_global-1 do
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out:write(format(" %s\n", t[i]))
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end
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out:write("\n")
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end
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-- Write global label enum.
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local function writeglobals(out, prefix)
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local t = {}
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for name, n in pairs(map_global) do t[n] = name end
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out:write("enum {\n")
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for i=20,next_global-1 do
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out:write(" ", prefix, t[i], ",\n")
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end
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out:write(" ", prefix, "_MAX\n};\n")
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end
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-- Write global label names.
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local function writeglobalnames(out, name)
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local t = {}
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for name, n in pairs(map_global) do t[n] = name end
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out:write("static const char *const ", name, "[] = {\n")
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for i=20,next_global-1 do
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out:write(" \"", t[i], "\",\n")
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end
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out:write(" (const char *)0\n};\n")
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end
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------------------------------------------------------------------------------
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-- Extern label name -> extern label number. With auto assignment on 1st use.
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local next_extern = 0
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local map_extern_ = {}
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local map_extern = setmetatable({}, { __index = function(t, name)
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-- No restrictions on the name for now.
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local n = next_extern
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if n > 2047 then werror("too many extern labels") end
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next_extern = n + 1
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t[name] = n
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map_extern_[n] = name
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return n
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end})
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-- Dump extern labels.
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local function dumpexterns(out, lvl)
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out:write("Extern labels:\n")
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for i=0,next_extern-1 do
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out:write(format(" %s\n", map_extern_[i]))
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end
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out:write("\n")
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end
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-- Write extern label names.
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local function writeexternnames(out, name)
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out:write("static const char *const ", name, "[] = {\n")
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for i=0,next_extern-1 do
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out:write(" \"", map_extern_[i], "\",\n")
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end
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out:write(" (const char *)0\n};\n")
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end
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------------------------------------------------------------------------------
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-- Arch-specific maps.
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-- Ext. register name -> int. name.
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local map_archdef = { xzr = "@x31", wzr = "@w31", lr = "x30", }
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-- Int. register name -> ext. name.
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local map_reg_rev = { ["@x31"] = "xzr", ["@w31"] = "wzr", x30 = "lr", }
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local map_type = {} -- Type name -> { ctype, reg }
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local ctypenum = 0 -- Type number (for Dt... macros).
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-- Reverse defines for registers.
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function _M.revdef(s)
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return map_reg_rev[s] or s
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end
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local map_shift = { lsl = 0, lsr = 1, asr = 2, }
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local map_extend = {
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uxtb = 0, uxth = 1, uxtw = 2, uxtx = 3,
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sxtb = 4, sxth = 5, sxtw = 6, sxtx = 7,
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}
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local map_cond = {
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eq = 0, ne = 1, cs = 2, cc = 3, mi = 4, pl = 5, vs = 6, vc = 7,
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hi = 8, ls = 9, ge = 10, lt = 11, gt = 12, le = 13, al = 14,
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hs = 2, lo = 3,
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}
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------------------------------------------------------------------------------
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local parse_reg_type
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local function parse_reg(expr)
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if not expr then werror("expected register name") end
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local tname, ovreg = match(expr, "^([%w_]+):(@?%l%d+)$")
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local tp = map_type[tname or expr]
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if tp then
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local reg = ovreg or tp.reg
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if not reg then
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werror("type `"..(tname or expr).."' needs a register override")
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end
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expr = reg
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end
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local ok31, rt, r = match(expr, "^(@?)([xwqdshb])([123]?[0-9])$")
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if r then
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r = tonumber(r)
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if r <= 30 or (r == 31 and ok31 ~= "" or (rt ~= "w" and rt ~= "x")) then
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if not parse_reg_type then
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parse_reg_type = rt
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elseif parse_reg_type ~= rt then
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werror("register size mismatch")
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end
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return r, tp
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end
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end
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werror("bad register name `"..expr.."'")
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end
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local function parse_reg_base(expr)
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if expr == "sp" then return 0x3e0 end
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local base, tp = parse_reg(expr)
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if parse_reg_type ~= "x" then werror("bad register type") end
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parse_reg_type = false
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return shl(base, 5), tp
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end
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local parse_ctx = {}
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local loadenv = setfenv and function(s)
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local code = loadstring(s, "")
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if code then setfenv(code, parse_ctx) end
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return code
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end or function(s)
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return load(s, "", nil, parse_ctx)
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end
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-- Try to parse simple arithmetic, too, since some basic ops are aliases.
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local function parse_number(n)
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local x = tonumber(n)
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if x then return x end
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local code = loadenv("return "..n)
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if code then
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local ok, y = pcall(code)
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if ok then return y end
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end
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return nil
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end
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local function parse_imm(imm, bits, shift, scale, signed)
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imm = match(imm, "^#(.*)$")
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if not imm then werror("expected immediate operand") end
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local n = parse_number(imm)
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if n then
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local m = sar(n, scale)
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if shl(m, scale) == n then
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if signed then
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local s = sar(m, bits-1)
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if s == 0 then return shl(m, shift)
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elseif s == -1 then return shl(m + shl(1, bits), shift) end
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else
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if sar(m, bits) == 0 then return shl(m, shift) end
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end
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end
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werror("out of range immediate `"..imm.."'")
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else
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waction("IMM", (signed and 32768 or 0)+scale*1024+bits*32+shift, imm)
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return 0
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end
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end
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local function parse_imm12(imm)
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imm = match(imm, "^#(.*)$")
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if not imm then werror("expected immediate operand") end
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local n = parse_number(imm)
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if n then
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if shr(n, 12) == 0 then
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return shl(n, 10)
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elseif band(n, 0xff000fff) == 0 then
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return shr(n, 2) + 0x00400000
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end
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werror("out of range immediate `"..imm.."'")
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else
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waction("IMM12", 0, imm)
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return 0
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end
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end
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local function parse_imm13(imm)
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imm = match(imm, "^#(.*)$")
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if not imm then werror("expected immediate operand") end
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local n = parse_number(imm)
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local r64 = parse_reg_type == "x"
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if n and n % 1 == 0 and n >= 0 and n <= 0xffffffff then
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local inv = false
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if band(n, 1) == 1 then n = bit.bnot(n); inv = true end
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local t = {}
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for i=1,32 do t[i] = band(n, 1); n = shr(n, 1) end
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local b = table.concat(t)
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b = b..(r64 and (inv and "1" or "0"):rep(32) or b)
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local p0, p1, p0a, p1a = b:match("^(0+)(1+)(0*)(1*)")
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if p0 then
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local w = p1a == "" and (r64 and 64 or 32) or #p1+#p0a
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if band(w, w-1) == 0 and b == b:sub(1, w):rep(64/w) then
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local s = band(-2*w, 0x3f) - 1
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if w == 64 then s = s + 0x1000 end
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if inv then
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return shl(w-#p1-#p0, 16) + shl(s+w-#p1, 10)
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else
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return shl(w-#p0, 16) + shl(s+#p1, 10)
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end
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end
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end
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werror("out of range immediate `"..imm.."'")
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elseif r64 then
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waction("IMM13X", 0, format("(unsigned int)(%s)", imm))
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actargs[#actargs+1] = format("(unsigned int)((unsigned long long)(%s)>>32)", imm)
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return 0
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else
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waction("IMM13W", 0, imm)
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return 0
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end
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end
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local function parse_imm6(imm)
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imm = match(imm, "^#(.*)$")
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if not imm then werror("expected immediate operand") end
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local n = parse_number(imm)
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if n then
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if n >= 0 and n <= 63 then
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return shl(band(n, 0x1f), 19) + (n >= 32 and 0x80000000 or 0)
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end
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werror("out of range immediate `"..imm.."'")
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else
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waction("IMM6", 0, imm)
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return 0
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end
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end
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local function parse_imm_load(imm, scale)
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local n = parse_number(imm)
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if n then
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local m = sar(n, scale)
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if shl(m, scale) == n and m >= 0 and m < 0x1000 then
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return shl(m, 10) + 0x01000000 -- Scaled, unsigned 12 bit offset.
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elseif n >= -256 and n < 256 then
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return shl(band(n, 511), 12) -- Unscaled, signed 9 bit offset.
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end
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werror("out of range immediate `"..imm.."'")
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else
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waction("IMML", 0, imm)
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return 0
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end
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end
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local function parse_fpimm(imm)
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imm = match(imm, "^#(.*)$")
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if not imm then werror("expected immediate operand") end
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local n = parse_number(imm)
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if n then
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local m, e = math.frexp(n)
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local s, e2 = 0, band(e-2, 7)
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if m < 0 then m = -m; s = 0x00100000 end
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m = m*32-16
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if m % 1 == 0 and m >= 0 and m <= 15 and sar(shl(e2, 29), 29)+2 == e then
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return s + shl(e2, 17) + shl(m, 13)
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end
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werror("out of range immediate `"..imm.."'")
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else
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werror("NYI fpimm action")
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end
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end
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local function parse_shift(expr)
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local s, s2 = match(expr, "^(%S+)%s*(.*)$")
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s = map_shift[s]
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if not s then werror("expected shift operand") end
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return parse_imm(s2, 6, 10, 0, false) + shl(s, 22)
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end
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local function parse_lslx16(expr)
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local n = match(expr, "^lsl%s*#(%d+)$")
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n = tonumber(n)
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if not n then werror("expected shift operand") end
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if band(n, parse_reg_type == "x" and 0xffffffcf or 0xffffffef) ~= 0 then
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werror("bad shift amount")
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end
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return shl(n, 17)
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end
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local function parse_extend(expr)
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local s, s2 = match(expr, "^(%S+)%s*(.*)$")
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if s == "lsl" then
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s = parse_reg_type == "x" and 3 or 2
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else
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s = map_extend[s]
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end
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if not s then werror("expected extend operand") end
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return (s2 == "" and 0 or parse_imm(s2, 3, 10, 0, false)) + shl(s, 13)
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end
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local function parse_cond(expr, inv)
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local c = map_cond[expr]
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if not c then werror("expected condition operand") end
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return shl(bit.bxor(c, inv), 12)
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end
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local function parse_load(params, nparams, n, op)
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if params[n+2] then werror("too many operands") end
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local pn, p2 = params[n], params[n+1]
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local p1, wb = match(pn, "^%[%s*(.-)%s*%](!?)$")
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if not p1 then
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if not p2 then
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local reg, tailr = match(pn, "^([%w_:]+)%s*(.*)$")
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if reg and tailr ~= "" then
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local base, tp = parse_reg_base(reg)
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if tp then
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waction("IMML", 0, format(tp.ctypefmt, tailr))
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return op + base
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end
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end
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end
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werror("expected address operand")
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end
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local scale = shr(op, 30)
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if p2 then
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if wb == "!" then werror("bad use of '!'") end
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op = op + parse_reg_base(p1) + parse_imm(p2, 9, 12, 0, true) + 0x400
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elseif wb == "!" then
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local p1a, p2a = match(p1, "^([^,%s]*)%s*,%s*(.*)$")
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if not p1a then werror("bad use of '!'") end
|
|
op = op + parse_reg_base(p1a) + parse_imm(p2a, 9, 12, 0, true) + 0xc00
|
|
else
|
|
local p1a, p2a = match(p1, "^([^,%s]*)%s*(.*)$")
|
|
op = op + parse_reg_base(p1a)
|
|
if p2a ~= "" then
|
|
local imm = match(p2a, "^,%s*#(.*)$")
|
|
if imm then
|
|
op = op + parse_imm_load(imm, scale)
|
|
else
|
|
local p2b, p3b, p3s = match(p2a, "^,%s*([^,%s]*)%s*,?%s*(%S*)%s*(.*)$")
|
|
op = op + shl(parse_reg(p2b), 16) + 0x00200800
|
|
if parse_reg_type ~= "x" and parse_reg_type ~= "w" then
|
|
werror("bad index register type")
|
|
end
|
|
if p3b == "" then
|
|
if parse_reg_type ~= "x" then werror("bad index register type") end
|
|
op = op + 0x6000
|
|
else
|
|
if p3s == "" or p3s == "#0" then
|
|
elseif p3s == "#"..scale then
|
|
op = op + 0x1000
|
|
else
|
|
werror("bad scale")
|
|
end
|
|
if parse_reg_type == "x" then
|
|
if p3b == "lsl" and p3s ~= "" then op = op + 0x6000
|
|
elseif p3b == "sxtx" then op = op + 0xe000
|
|
else
|
|
werror("bad extend/shift specifier")
|
|
end
|
|
else
|
|
if p3b == "uxtw" then op = op + 0x4000
|
|
elseif p3b == "sxtw" then op = op + 0xc000
|
|
else
|
|
werror("bad extend/shift specifier")
|
|
end
|
|
end
|
|
end
|
|
end
|
|
else
|
|
if wb == "!" then werror("bad use of '!'") end
|
|
op = op + 0x01000000
|
|
end
|
|
end
|
|
return op
|
|
end
|
|
|
|
local function parse_load_pair(params, nparams, n, op)
|
|
if params[n+2] then werror("too many operands") end
|
|
local pn, p2 = params[n], params[n+1]
|
|
local scale = shr(op, 30) == 0 and 2 or 3
|
|
local p1, wb = match(pn, "^%[%s*(.-)%s*%](!?)$")
|
|
if not p1 then
|
|
if not p2 then
|
|
local reg, tailr = match(pn, "^([%w_:]+)%s*(.*)$")
|
|
if reg and tailr ~= "" then
|
|
local base, tp = parse_reg_base(reg)
|
|
if tp then
|
|
waction("IMM", 32768+7*32+15+scale*1024, format(tp.ctypefmt, tailr))
|
|
return op + base + 0x01000000
|
|
end
|
|
end
|
|
end
|
|
werror("expected address operand")
|
|
end
|
|
if p2 then
|
|
if wb == "!" then werror("bad use of '!'") end
|
|
op = op + 0x00800000
|
|
else
|
|
local p1a, p2a = match(p1, "^([^,%s]*)%s*,%s*(.*)$")
|
|
if p1a then p1, p2 = p1a, p2a else p2 = "#0" end
|
|
op = op + (wb == "!" and 0x01800000 or 0x01000000)
|
|
end
|
|
return op + parse_reg_base(p1) + parse_imm(p2, 7, 15, scale, true)
|
|
end
|
|
|
|
local function parse_label(label, def)
|
|
local prefix = sub(label, 1, 2)
|
|
-- =>label (pc label reference)
|
|
if prefix == "=>" then
|
|
return "PC", 0, sub(label, 3)
|
|
end
|
|
-- ->name (global label reference)
|
|
if prefix == "->" then
|
|
return "LG", map_global[sub(label, 3)]
|
|
end
|
|
if def then
|
|
-- [1-9] (local label definition)
|
|
if match(label, "^[1-9]$") then
|
|
return "LG", 10+tonumber(label)
|
|
end
|
|
else
|
|
-- [<>][1-9] (local label reference)
|
|
local dir, lnum = match(label, "^([<>])([1-9])$")
|
|
if dir then -- Fwd: 1-9, Bkwd: 11-19.
|
|
return "LG", lnum + (dir == ">" and 0 or 10)
|
|
end
|
|
-- extern label (extern label reference)
|
|
local extname = match(label, "^extern%s+(%S+)$")
|
|
if extname then
|
|
return "EXT", map_extern[extname]
|
|
end
|
|
end
|
|
werror("bad label `"..label.."'")
|
|
end
|
|
|
|
local function branch_type(op)
|
|
if band(op, 0x7c000000) == 0x14000000 then return 0 -- B, BL
|
|
elseif shr(op, 24) == 0x54 or band(op, 0x7e000000) == 0x34000000 or
|
|
band(op, 0x3b000000) == 0x18000000 then
|
|
return 0x800 -- B.cond, CBZ, CBNZ, LDR* literal
|
|
elseif band(op, 0x7e000000) == 0x36000000 then return 0x1000 -- TBZ, TBNZ
|
|
elseif band(op, 0x9f000000) == 0x10000000 then return 0x2000 -- ADR
|
|
elseif band(op, 0x9f000000) == band(0x90000000) then return 0x3000 -- ADRP
|
|
else
|
|
assert(false, "unknown branch type")
|
|
end
|
|
end
|
|
|
|
------------------------------------------------------------------------------
|
|
|
|
local map_op, op_template
|
|
|
|
local function op_alias(opname, f)
|
|
return function(params, nparams)
|
|
if not params then return "-> "..opname:sub(1, -3) end
|
|
f(params, nparams)
|
|
op_template(params, map_op[opname], nparams)
|
|
end
|
|
end
|
|
|
|
local function alias_bfx(p)
|
|
p[4] = "#("..p[3]:sub(2)..")+("..p[4]:sub(2)..")-1"
|
|
end
|
|
|
|
local function alias_bfiz(p)
|
|
parse_reg(p[1])
|
|
if parse_reg_type == "w" then
|
|
p[3] = "#-("..p[3]:sub(2)..")%32"
|
|
p[4] = "#("..p[4]:sub(2)..")-1"
|
|
else
|
|
p[3] = "#-("..p[3]:sub(2)..")%64"
|
|
p[4] = "#("..p[4]:sub(2)..")-1"
|
|
end
|
|
end
|
|
|
|
local alias_lslimm = op_alias("ubfm_4", function(p)
|
|
parse_reg(p[1])
|
|
local sh = p[3]:sub(2)
|
|
if parse_reg_type == "w" then
|
|
p[3] = "#-("..sh..")%32"
|
|
p[4] = "#31-("..sh..")"
|
|
else
|
|
p[3] = "#-("..sh..")%64"
|
|
p[4] = "#63-("..sh..")"
|
|
end
|
|
end)
|
|
|
|
-- Template strings for ARM instructions.
|
|
map_op = {
|
|
-- Basic data processing instructions.
|
|
add_3 = "0b000000DNMg|11000000pDpNIg|8b206000pDpNMx",
|
|
add_4 = "0b000000DNMSg|0b200000DNMXg|8b200000pDpNMXx|8b200000pDpNxMwX",
|
|
adds_3 = "2b000000DNMg|31000000DpNIg|ab206000DpNMx",
|
|
adds_4 = "2b000000DNMSg|2b200000DNMXg|ab200000DpNMXx|ab200000DpNxMwX",
|
|
cmn_2 = "2b00001fNMg|3100001fpNIg|ab20601fpNMx",
|
|
cmn_3 = "2b00001fNMSg|2b20001fNMXg|ab20001fpNMXx|ab20001fpNxMwX",
|
|
|
|
sub_3 = "4b000000DNMg|51000000pDpNIg|cb206000pDpNMx",
|
|
sub_4 = "4b000000DNMSg|4b200000DNMXg|cb200000pDpNMXx|cb200000pDpNxMwX",
|
|
subs_3 = "6b000000DNMg|71000000DpNIg|eb206000DpNMx",
|
|
subs_4 = "6b000000DNMSg|6b200000DNMXg|eb200000DpNMXx|eb200000DpNxMwX",
|
|
cmp_2 = "6b00001fNMg|7100001fpNIg|eb20601fpNMx",
|
|
cmp_3 = "6b00001fNMSg|6b20001fNMXg|eb20001fpNMXx|eb20001fpNxMwX",
|
|
|
|
neg_2 = "4b0003e0DMg",
|
|
neg_3 = "4b0003e0DMSg",
|
|
negs_2 = "6b0003e0DMg",
|
|
negs_3 = "6b0003e0DMSg",
|
|
|
|
adc_3 = "1a000000DNMg",
|
|
adcs_3 = "3a000000DNMg",
|
|
sbc_3 = "5a000000DNMg",
|
|
sbcs_3 = "7a000000DNMg",
|
|
ngc_2 = "5a0003e0DMg",
|
|
ngcs_2 = "7a0003e0DMg",
|
|
|
|
and_3 = "0a000000DNMg|12000000pDNig",
|
|
and_4 = "0a000000DNMSg",
|
|
orr_3 = "2a000000DNMg|32000000pDNig",
|
|
orr_4 = "2a000000DNMSg",
|
|
eor_3 = "4a000000DNMg|52000000pDNig",
|
|
eor_4 = "4a000000DNMSg",
|
|
ands_3 = "6a000000DNMg|72000000DNig",
|
|
ands_4 = "6a000000DNMSg",
|
|
tst_2 = "6a00001fNMg|7200001fNig",
|
|
tst_3 = "6a00001fNMSg",
|
|
|
|
bic_3 = "0a200000DNMg",
|
|
bic_4 = "0a200000DNMSg",
|
|
orn_3 = "2a200000DNMg",
|
|
orn_4 = "2a200000DNMSg",
|
|
eon_3 = "4a200000DNMg",
|
|
eon_4 = "4a200000DNMSg",
|
|
bics_3 = "6a200000DNMg",
|
|
bics_4 = "6a200000DNMSg",
|
|
|
|
movn_2 = "12800000DWg",
|
|
movn_3 = "12800000DWRg",
|
|
movz_2 = "52800000DWg",
|
|
movz_3 = "52800000DWRg",
|
|
movk_2 = "72800000DWg",
|
|
movk_3 = "72800000DWRg",
|
|
|
|
-- TODO: this doesn't cover all valid immediates for mov reg, #imm.
|
|
mov_2 = "2a0003e0DMg|52800000DW|320003e0pDig|11000000pDpNg",
|
|
mov_3 = "2a0003e0DMSg",
|
|
mvn_2 = "2a2003e0DMg",
|
|
mvn_3 = "2a2003e0DMSg",
|
|
|
|
adr_2 = "10000000DBx",
|
|
adrp_2 = "90000000DBx",
|
|
|
|
csel_4 = "1a800000DNMCg",
|
|
csinc_4 = "1a800400DNMCg",
|
|
csinv_4 = "5a800000DNMCg",
|
|
csneg_4 = "5a800400DNMCg",
|
|
cset_2 = "1a9f07e0Dcg",
|
|
csetm_2 = "5a9f03e0Dcg",
|
|
cinc_3 = "1a800400DNmcg",
|
|
cinv_3 = "5a800000DNmcg",
|
|
cneg_3 = "5a800400DNmcg",
|
|
|
|
ccmn_4 = "3a400000NMVCg|3a400800N5VCg",
|
|
ccmp_4 = "7a400000NMVCg|7a400800N5VCg",
|
|
|
|
madd_4 = "1b000000DNMAg",
|
|
msub_4 = "1b008000DNMAg",
|
|
mul_3 = "1b007c00DNMg",
|
|
mneg_3 = "1b00fc00DNMg",
|
|
|
|
smaddl_4 = "9b200000DxNMwAx",
|
|
smsubl_4 = "9b208000DxNMwAx",
|
|
smull_3 = "9b207c00DxNMw",
|
|
smnegl_3 = "9b20fc00DxNMw",
|
|
smulh_3 = "9b407c00DNMx",
|
|
umaddl_4 = "9ba00000DxNMwAx",
|
|
umsubl_4 = "9ba08000DxNMwAx",
|
|
umull_3 = "9ba07c00DxNMw",
|
|
umnegl_3 = "9ba0fc00DxNMw",
|
|
umulh_3 = "9bc07c00DNMx",
|
|
|
|
udiv_3 = "1ac00800DNMg",
|
|
sdiv_3 = "1ac00c00DNMg",
|
|
|
|
-- Bit operations.
|
|
sbfm_4 = "13000000DN12w|93400000DN12x",
|
|
bfm_4 = "33000000DN12w|b3400000DN12x",
|
|
ubfm_4 = "53000000DN12w|d3400000DN12x",
|
|
extr_4 = "13800000DNM2w|93c00000DNM2x",
|
|
|
|
sxtb_2 = "13001c00DNw|93401c00DNx",
|
|
sxth_2 = "13003c00DNw|93403c00DNx",
|
|
sxtw_2 = "93407c00DxNw",
|
|
uxtb_2 = "53001c00DNw",
|
|
uxth_2 = "53003c00DNw",
|
|
|
|
sbfx_4 = op_alias("sbfm_4", alias_bfx),
|
|
bfxil_4 = op_alias("bfm_4", alias_bfx),
|
|
ubfx_4 = op_alias("ubfm_4", alias_bfx),
|
|
sbfiz_4 = op_alias("sbfm_4", alias_bfiz),
|
|
bfi_4 = op_alias("bfm_4", alias_bfiz),
|
|
ubfiz_4 = op_alias("ubfm_4", alias_bfiz),
|
|
|
|
lsl_3 = function(params, nparams)
|
|
if params and params[3]:byte() == 35 then
|
|
return alias_lslimm(params, nparams)
|
|
else
|
|
return op_template(params, "1ac02000DNMg", nparams)
|
|
end
|
|
end,
|
|
lsr_3 = "1ac02400DNMg|53007c00DN1w|d340fc00DN1x",
|
|
asr_3 = "1ac02800DNMg|13007c00DN1w|9340fc00DN1x",
|
|
ror_3 = "1ac02c00DNMg|13800000DNm2w|93c00000DNm2x",
|
|
|
|
clz_2 = "5ac01000DNg",
|
|
cls_2 = "5ac01400DNg",
|
|
rbit_2 = "5ac00000DNg",
|
|
rev_2 = "5ac00800DNw|dac00c00DNx",
|
|
rev16_2 = "5ac00400DNg",
|
|
rev32_2 = "dac00800DNx",
|
|
|
|
-- Loads and stores.
|
|
["strb_*"] = "38000000DwL",
|
|
["ldrb_*"] = "38400000DwL",
|
|
["ldrsb_*"] = "38c00000DwL|38800000DxL",
|
|
["strh_*"] = "78000000DwL",
|
|
["ldrh_*"] = "78400000DwL",
|
|
["ldrsh_*"] = "78c00000DwL|78800000DxL",
|
|
["str_*"] = "b8000000DwL|f8000000DxL|bc000000DsL|fc000000DdL",
|
|
["ldr_*"] = "18000000DwB|58000000DxB|1c000000DsB|5c000000DdB|b8400000DwL|f8400000DxL|bc400000DsL|fc400000DdL",
|
|
["ldrsw_*"] = "98000000DxB|b8800000DxL",
|
|
-- NOTE: ldur etc. are handled by ldr et al.
|
|
|
|
["stp_*"] = "28000000DAwP|a8000000DAxP|2c000000DAsP|6c000000DAdP",
|
|
["ldp_*"] = "28400000DAwP|a8400000DAxP|2c400000DAsP|6c400000DAdP",
|
|
["ldpsw_*"] = "68400000DAxP",
|
|
|
|
-- Branches.
|
|
b_1 = "14000000B",
|
|
bl_1 = "94000000B",
|
|
blr_1 = "d63f0000Nx",
|
|
br_1 = "d61f0000Nx",
|
|
ret_0 = "d65f03c0",
|
|
ret_1 = "d65f0000Nx",
|
|
-- b.cond is added below.
|
|
cbz_2 = "34000000DBg",
|
|
cbnz_2 = "35000000DBg",
|
|
tbz_3 = "36000000DTBw|36000000DTBx",
|
|
tbnz_3 = "37000000DTBw|37000000DTBx",
|
|
|
|
-- Miscellaneous instructions.
|
|
-- TODO: hlt, hvc, smc, svc, eret, dcps[123], drps, mrs, msr
|
|
-- TODO: sys, sysl, ic, dc, at, tlbi
|
|
-- TODO: hint, yield, wfe, wfi, sev, sevl
|
|
-- TODO: clrex, dsb, dmb, isb
|
|
nop_0 = "d503201f",
|
|
brk_0 = "d4200000",
|
|
brk_1 = "d4200000W",
|
|
|
|
-- Floating point instructions.
|
|
fmov_2 = "1e204000DNf|1e260000DwNs|1e270000DsNw|9e660000DxNd|9e670000DdNx|1e201000DFf",
|
|
fabs_2 = "1e20c000DNf",
|
|
fneg_2 = "1e214000DNf",
|
|
fsqrt_2 = "1e21c000DNf",
|
|
|
|
fcvt_2 = "1e22c000DdNs|1e624000DsNd",
|
|
|
|
-- TODO: half-precision and fixed-point conversions.
|
|
fcvtas_2 = "1e240000DwNs|9e240000DxNs|1e640000DwNd|9e640000DxNd",
|
|
fcvtau_2 = "1e250000DwNs|9e250000DxNs|1e650000DwNd|9e650000DxNd",
|
|
fcvtms_2 = "1e300000DwNs|9e300000DxNs|1e700000DwNd|9e700000DxNd",
|
|
fcvtmu_2 = "1e310000DwNs|9e310000DxNs|1e710000DwNd|9e710000DxNd",
|
|
fcvtns_2 = "1e200000DwNs|9e200000DxNs|1e600000DwNd|9e600000DxNd",
|
|
fcvtnu_2 = "1e210000DwNs|9e210000DxNs|1e610000DwNd|9e610000DxNd",
|
|
fcvtps_2 = "1e280000DwNs|9e280000DxNs|1e680000DwNd|9e680000DxNd",
|
|
fcvtpu_2 = "1e290000DwNs|9e290000DxNs|1e690000DwNd|9e690000DxNd",
|
|
fcvtzs_2 = "1e380000DwNs|9e380000DxNs|1e780000DwNd|9e780000DxNd",
|
|
fcvtzu_2 = "1e390000DwNs|9e390000DxNs|1e790000DwNd|9e790000DxNd",
|
|
|
|
scvtf_2 = "1e220000DsNw|9e220000DsNx|1e620000DdNw|9e620000DdNx",
|
|
ucvtf_2 = "1e230000DsNw|9e230000DsNx|1e630000DdNw|9e630000DdNx",
|
|
|
|
frintn_2 = "1e244000DNf",
|
|
frintp_2 = "1e24c000DNf",
|
|
frintm_2 = "1e254000DNf",
|
|
frintz_2 = "1e25c000DNf",
|
|
frinta_2 = "1e264000DNf",
|
|
frintx_2 = "1e274000DNf",
|
|
frinti_2 = "1e27c000DNf",
|
|
|
|
fadd_3 = "1e202800DNMf",
|
|
fsub_3 = "1e203800DNMf",
|
|
fmul_3 = "1e200800DNMf",
|
|
fnmul_3 = "1e208800DNMf",
|
|
fdiv_3 = "1e201800DNMf",
|
|
|
|
fmadd_4 = "1f000000DNMAf",
|
|
fmsub_4 = "1f008000DNMAf",
|
|
fnmadd_4 = "1f200000DNMAf",
|
|
fnmsub_4 = "1f208000DNMAf",
|
|
|
|
fmax_3 = "1e204800DNMf",
|
|
fmaxnm_3 = "1e206800DNMf",
|
|
fmin_3 = "1e205800DNMf",
|
|
fminnm_3 = "1e207800DNMf",
|
|
|
|
fcmp_2 = "1e202000NMf|1e202008NZf",
|
|
fcmpe_2 = "1e202010NMf|1e202018NZf",
|
|
|
|
fccmp_4 = "1e200400NMVCf",
|
|
fccmpe_4 = "1e200410NMVCf",
|
|
|
|
fcsel_4 = "1e200c00DNMCf",
|
|
|
|
-- TODO: crc32*, aes*, sha*, pmull
|
|
-- TODO: SIMD instructions.
|
|
}
|
|
|
|
for cond,c in pairs(map_cond) do
|
|
map_op["b"..cond.."_1"] = tohex(0x54000000+c).."B"
|
|
end
|
|
|
|
------------------------------------------------------------------------------
|
|
|
|
-- Handle opcodes defined with template strings.
|
|
local function parse_template(params, template, nparams, pos)
|
|
local op = tonumber(sub(template, 1, 8), 16)
|
|
local n = 1
|
|
local rtt = {}
|
|
|
|
parse_reg_type = false
|
|
|
|
-- Process each character.
|
|
for p in gmatch(sub(template, 9), ".") do
|
|
local q = params[n]
|
|
if p == "D" then
|
|
op = op + parse_reg(q); n = n + 1
|
|
elseif p == "N" then
|
|
op = op + shl(parse_reg(q), 5); n = n + 1
|
|
elseif p == "M" then
|
|
op = op + shl(parse_reg(q), 16); n = n + 1
|
|
elseif p == "A" then
|
|
op = op + shl(parse_reg(q), 10); n = n + 1
|
|
elseif p == "m" then
|
|
op = op + shl(parse_reg(params[n-1]), 16)
|
|
|
|
elseif p == "p" then
|
|
if q == "sp" then params[n] = "@x31" end
|
|
elseif p == "g" then
|
|
if parse_reg_type == "x" then
|
|
op = op + 0x80000000
|
|
elseif parse_reg_type ~= "w" then
|
|
werror("bad register type")
|
|
end
|
|
parse_reg_type = false
|
|
elseif p == "f" then
|
|
if parse_reg_type == "d" then
|
|
op = op + 0x00400000
|
|
elseif parse_reg_type ~= "s" then
|
|
werror("bad register type")
|
|
end
|
|
parse_reg_type = false
|
|
elseif p == "x" or p == "w" or p == "d" or p == "s" then
|
|
if parse_reg_type ~= p then
|
|
werror("register size mismatch")
|
|
end
|
|
parse_reg_type = false
|
|
|
|
elseif p == "L" then
|
|
op = parse_load(params, nparams, n, op)
|
|
elseif p == "P" then
|
|
op = parse_load_pair(params, nparams, n, op)
|
|
|
|
elseif p == "B" then
|
|
local mode, v, s = parse_label(q, false); n = n + 1
|
|
local m = branch_type(op)
|
|
waction("REL_"..mode, v+m, s, 1)
|
|
|
|
elseif p == "I" then
|
|
op = op + parse_imm12(q); n = n + 1
|
|
elseif p == "i" then
|
|
op = op + parse_imm13(q); n = n + 1
|
|
elseif p == "W" then
|
|
op = op + parse_imm(q, 16, 5, 0, false); n = n + 1
|
|
elseif p == "T" then
|
|
op = op + parse_imm6(q); n = n + 1
|
|
elseif p == "1" then
|
|
op = op + parse_imm(q, 6, 16, 0, false); n = n + 1
|
|
elseif p == "2" then
|
|
op = op + parse_imm(q, 6, 10, 0, false); n = n + 1
|
|
elseif p == "5" then
|
|
op = op + parse_imm(q, 5, 16, 0, false); n = n + 1
|
|
elseif p == "V" then
|
|
op = op + parse_imm(q, 4, 0, 0, false); n = n + 1
|
|
elseif p == "F" then
|
|
op = op + parse_fpimm(q); n = n + 1
|
|
elseif p == "Z" then
|
|
if q ~= "#0" and q ~= "#0.0" then werror("expected zero immediate") end
|
|
n = n + 1
|
|
|
|
elseif p == "S" then
|
|
op = op + parse_shift(q); n = n + 1
|
|
elseif p == "X" then
|
|
op = op + parse_extend(q); n = n + 1
|
|
elseif p == "R" then
|
|
op = op + parse_lslx16(q); n = n + 1
|
|
elseif p == "C" then
|
|
op = op + parse_cond(q, 0); n = n + 1
|
|
elseif p == "c" then
|
|
op = op + parse_cond(q, 1); n = n + 1
|
|
|
|
else
|
|
assert(false)
|
|
end
|
|
end
|
|
wputpos(pos, op)
|
|
end
|
|
|
|
function op_template(params, template, nparams)
|
|
if not params then return template:gsub("%x%x%x%x%x%x%x%x", "") end
|
|
|
|
-- Limit number of section buffer positions used by a single dasm_put().
|
|
-- A single opcode needs a maximum of 3 positions.
|
|
if secpos+3 > maxsecpos then wflush() end
|
|
local pos = wpos()
|
|
local lpos, apos, spos = #actlist, #actargs, secpos
|
|
|
|
local ok, err
|
|
for t in gmatch(template, "[^|]+") do
|
|
ok, err = pcall(parse_template, params, t, nparams, pos)
|
|
if ok then return end
|
|
secpos = spos
|
|
actlist[lpos+1] = nil
|
|
actlist[lpos+2] = nil
|
|
actlist[lpos+3] = nil
|
|
actargs[apos+1] = nil
|
|
actargs[apos+2] = nil
|
|
actargs[apos+3] = nil
|
|
end
|
|
error(err, 0)
|
|
end
|
|
|
|
map_op[".template__"] = op_template
|
|
|
|
------------------------------------------------------------------------------
|
|
|
|
-- Pseudo-opcode to mark the position where the action list is to be emitted.
|
|
map_op[".actionlist_1"] = function(params)
|
|
if not params then return "cvar" end
|
|
local name = params[1] -- No syntax check. You get to keep the pieces.
|
|
wline(function(out) writeactions(out, name) end)
|
|
end
|
|
|
|
-- Pseudo-opcode to mark the position where the global enum is to be emitted.
|
|
map_op[".globals_1"] = function(params)
|
|
if not params then return "prefix" end
|
|
local prefix = params[1] -- No syntax check. You get to keep the pieces.
|
|
wline(function(out) writeglobals(out, prefix) end)
|
|
end
|
|
|
|
-- Pseudo-opcode to mark the position where the global names are to be emitted.
|
|
map_op[".globalnames_1"] = function(params)
|
|
if not params then return "cvar" end
|
|
local name = params[1] -- No syntax check. You get to keep the pieces.
|
|
wline(function(out) writeglobalnames(out, name) end)
|
|
end
|
|
|
|
-- Pseudo-opcode to mark the position where the extern names are to be emitted.
|
|
map_op[".externnames_1"] = function(params)
|
|
if not params then return "cvar" end
|
|
local name = params[1] -- No syntax check. You get to keep the pieces.
|
|
wline(function(out) writeexternnames(out, name) end)
|
|
end
|
|
|
|
------------------------------------------------------------------------------
|
|
|
|
-- Label pseudo-opcode (converted from trailing colon form).
|
|
map_op[".label_1"] = function(params)
|
|
if not params then return "[1-9] | ->global | =>pcexpr" end
|
|
if secpos+1 > maxsecpos then wflush() end
|
|
local mode, n, s = parse_label(params[1], true)
|
|
if mode == "EXT" then werror("bad label definition") end
|
|
waction("LABEL_"..mode, n, s, 1)
|
|
end
|
|
|
|
------------------------------------------------------------------------------
|
|
|
|
-- Pseudo-opcodes for data storage.
|
|
map_op[".long_*"] = function(params)
|
|
if not params then return "imm..." end
|
|
for _,p in ipairs(params) do
|
|
local n = tonumber(p)
|
|
if not n then werror("bad immediate `"..p.."'") end
|
|
if n < 0 then n = n + 2^32 end
|
|
wputw(n)
|
|
if secpos+2 > maxsecpos then wflush() end
|
|
end
|
|
end
|
|
|
|
-- Alignment pseudo-opcode.
|
|
map_op[".align_1"] = function(params)
|
|
if not params then return "numpow2" end
|
|
if secpos+1 > maxsecpos then wflush() end
|
|
local align = tonumber(params[1])
|
|
if align then
|
|
local x = align
|
|
-- Must be a power of 2 in the range (2 ... 256).
|
|
for i=1,8 do
|
|
x = x / 2
|
|
if x == 1 then
|
|
waction("ALIGN", align-1, nil, 1) -- Action byte is 2**n-1.
|
|
return
|
|
end
|
|
end
|
|
end
|
|
werror("bad alignment")
|
|
end
|
|
|
|
------------------------------------------------------------------------------
|
|
|
|
-- Pseudo-opcode for (primitive) type definitions (map to C types).
|
|
map_op[".type_3"] = function(params, nparams)
|
|
if not params then
|
|
return nparams == 2 and "name, ctype" or "name, ctype, reg"
|
|
end
|
|
local name, ctype, reg = params[1], params[2], params[3]
|
|
if not match(name, "^[%a_][%w_]*$") then
|
|
werror("bad type name `"..name.."'")
|
|
end
|
|
local tp = map_type[name]
|
|
if tp then
|
|
werror("duplicate type `"..name.."'")
|
|
end
|
|
-- Add #type to defines. A bit unclean to put it in map_archdef.
|
|
map_archdef["#"..name] = "sizeof("..ctype..")"
|
|
-- Add new type and emit shortcut define.
|
|
local num = ctypenum + 1
|
|
map_type[name] = {
|
|
ctype = ctype,
|
|
ctypefmt = format("Dt%X(%%s)", num),
|
|
reg = reg,
|
|
}
|
|
wline(format("#define Dt%X(_V) (int)(ptrdiff_t)&(((%s *)0)_V)", num, ctype))
|
|
ctypenum = num
|
|
end
|
|
map_op[".type_2"] = map_op[".type_3"]
|
|
|
|
-- Dump type definitions.
|
|
local function dumptypes(out, lvl)
|
|
local t = {}
|
|
for name in pairs(map_type) do t[#t+1] = name end
|
|
sort(t)
|
|
out:write("Type definitions:\n")
|
|
for _,name in ipairs(t) do
|
|
local tp = map_type[name]
|
|
local reg = tp.reg or ""
|
|
out:write(format(" %-20s %-20s %s\n", name, tp.ctype, reg))
|
|
end
|
|
out:write("\n")
|
|
end
|
|
|
|
------------------------------------------------------------------------------
|
|
|
|
-- Set the current section.
|
|
function _M.section(num)
|
|
waction("SECTION", num)
|
|
wflush(true) -- SECTION is a terminal action.
|
|
end
|
|
|
|
------------------------------------------------------------------------------
|
|
|
|
-- Dump architecture description.
|
|
function _M.dumparch(out)
|
|
out:write(format("DynASM %s version %s, released %s\n\n",
|
|
_info.arch, _info.version, _info.release))
|
|
dumpactions(out)
|
|
end
|
|
|
|
-- Dump all user defined elements.
|
|
function _M.dumpdef(out, lvl)
|
|
dumptypes(out, lvl)
|
|
dumpglobals(out, lvl)
|
|
dumpexterns(out, lvl)
|
|
end
|
|
|
|
------------------------------------------------------------------------------
|
|
|
|
-- Pass callbacks from/to the DynASM core.
|
|
function _M.passcb(wl, we, wf, ww)
|
|
wline, werror, wfatal, wwarn = wl, we, wf, ww
|
|
return wflush
|
|
end
|
|
|
|
-- Setup the arch-specific module.
|
|
function _M.setup(arch, opt)
|
|
g_arch, g_opt = arch, opt
|
|
end
|
|
|
|
-- Merge the core maps and the arch-specific maps.
|
|
function _M.mergemaps(map_coreop, map_def)
|
|
setmetatable(map_op, { __index = map_coreop })
|
|
setmetatable(map_def, { __index = map_archdef })
|
|
return map_op, map_def
|
|
end
|
|
|
|
return _M
|
|
|
|
------------------------------------------------------------------------------
|
|
|