--- /dev/null
+----------------------------------------------------------------------------
+-- LuaJIT MIPS disassembler module.
+--
+-- Copyright (C) 2005-2011 Mike Pall. All rights reserved.
+-- Released under the MIT/X license. See Copyright Notice in luajit.h
+----------------------------------------------------------------------------
+-- This is a helper module used by the LuaJIT machine code dumper module.
+--
+-- It disassembles all standard MIPS32R1/R2 instructions.
+-- Default mode is big-endian, but see: dis_mipsel.lua
+------------------------------------------------------------------------------
+
+local type = type
+local sub, byte, format = string.sub, string.byte, string.format
+local match, gmatch, gsub = string.match, string.gmatch, string.gsub
+local concat = table.concat
+local bit = require("bit")
+local band, bor, tohex = bit.band, bit.bor, bit.tohex
+local lshift, rshift, arshift = bit.lshift, bit.rshift, bit.arshift
+
+------------------------------------------------------------------------------
+-- Primary and extended opcode maps
+------------------------------------------------------------------------------
+
+local map_movci = { shift = 16, mask = 1, [0] = "movfDSC", "movtDSC", }
+local map_srl = { shift = 21, mask = 1, [0] = "srlDTA", "rotrDTA", }
+local map_srlv = { shift = 6, mask = 1, [0] = "srlvDTS", "rotrvDTS", }
+
+local map_special = {
+ shift = 0, mask = 63,
+ [0] = { shift = 0, mask = -1, [0] = "nop", _ = "sllDTA" },
+ map_movci, map_srl, "sraDTA",
+ "sllvDTS", false, map_srlv, "sravDTS",
+ "jrS", "jalrD1S", "movzDST", "movnDST",
+ "syscallY", "breakY", false, "sync",
+ "mfhiD", "mthiS", "mfloD", "mtloS",
+ false, false, false, false,
+ "multST", "multuST", "divST", "divuST",
+ false, false, false, false,
+ "addDST", "addu|moveDST0", "subDST", "subu|neguDS0T",
+ "andDST", "orDST", "xorDST", "nor|notDST0",
+ false, false, "sltDST", "sltuDST",
+ false, false, false, false,
+ "tgeSTZ", "tgeuSTZ", "tltSTZ", "tltuSTZ",
+ "teqSTZ", false, "tneSTZ",
+}
+
+local map_special2 = {
+ shift = 0, mask = 63,
+ [0] = "maddST", "madduST", "mulDST", false,
+ "msubST", "msubuST",
+ [32] = "clzDS", [33] = "cloDS",
+ [63] = "sdbbpY",
+}
+
+local map_bshfl = {
+ shift = 6, mask = 31,
+ [2] = "wsbhDT",
+ [16] = "sebDT",
+ [24] = "sehDT",
+}
+
+local map_special3 = {
+ shift = 0, mask = 63,
+ [0] = "extTSAK", [4] = "insTSAL",
+ [32] = map_bshfl,
+ [59] = "rdhwrTD",
+}
+
+local map_regimm = {
+ shift = 16, mask = 31,
+ [0] = "bltzSB", "bgezSB", "bltzlSB", "bgezlSB",
+ false, false, false, false,
+ "tgeiSI", "tgeiuSI", "tltiSI", "tltiuSI",
+ "teqiSI", false, "tneiSI", false,
+ "bltzalSB", "bgezalSB", "bltzallSB", "bgezallSB",
+ false, false, false, false,
+ false, false, false, false,
+ false, false, false, "synciSO",
+}
+
+local map_cop0 = {
+ shift = 25, mask = 1,
+ [0] = {
+ shift = 21, mask = 15,
+ [0] = "mfc0TDW", [4] = "mtc0TDW",
+ [10] = "rdpgprDT",
+ [11] = { shift = 5, mask = 1, [0] = "diT0", "eiT0", },
+ [14] = "wrpgprDT",
+ }, {
+ shift = 0, mask = 63,
+ [1] = "tlbr", [2] = "tlbwi", [6] = "tlbwr", [8] = "tlbp",
+ [24] = "eret", [31] = "deret",
+ [32] = "wait",
+ },
+}
+
+local map_cop1s = {
+ shift = 0, mask = 63,
+ [0] = "add.sFGH", "sub.sFGH", "mul.sFGH", "div.sFGH",
+ "sqrt.sFG", "abs.sFG", "mov.sFG", "neg.sFG",
+ "round.l.sFG", "trunc.l.sFG", "ceil.l.sFG", "floor.l.sFG",
+ "round.w.sFG", "trunc.w.sFG", "ceil.w.sFG", "floor.w.sFG",
+ false,
+ { shift = 16, mask = 1, [0] = "movf.sFGC", "movt.sFGC" },
+ "movz.sFGT", "movn.sFGT",
+ false, "recip.sFG", "rsqrt.sFG", false,
+ false, false, false, false,
+ false, false, false, false,
+ false, "cvt.d.sFG", false, false,
+ "cvt.w.sFG", "cvt.l.sFG", "cvt.ps.sFGH", false,
+ false, false, false, false,
+ false, false, false, false,
+ "c.f.sVGH", "c.un.sVGH", "c.eq.sVGH", "c.ueq.sVGH",
+ "c.olt.sVGH", "c.ult.sVGH", "c.ole.sVGH", "c.ule.sVGH",
+ "c.sf.sVGH", "c.ngle.sVGH", "c.seq.sVGH", "c.ngl.sVGH",
+ "c.lt.sVGH", "c.nge.sVGH", "c.le.sVGH", "c.ngt.sVGH",
+}
+
+local map_cop1d = {
+ shift = 0, mask = 63,
+ [0] = "add.dFGH", "sub.dFGH", "mul.dFGH", "div.dFGH",
+ "sqrt.dFG", "abs.dFG", "mov.dFG", "neg.dFG",
+ "round.l.dFG", "trunc.l.dFG", "ceil.l.dFG", "floor.l.dFG",
+ "round.w.dFG", "trunc.w.dFG", "ceil.w.dFG", "floor.w.dFG",
+ false,
+ { shift = 16, mask = 1, [0] = "movf.dFGC", "movt.dFGC" },
+ "movz.dFGT", "movn.dFGT",
+ false, "recip.dFG", "rsqrt.dFG", false,
+ false, false, false, false,
+ false, false, false, false,
+ "cvt.s.dFG", false, false, false,
+ "cvt.w.dFG", "cvt.l.dFG", false, false,
+ false, false, false, false,
+ false, false, false, false,
+ "c.f.dVGH", "c.un.dVGH", "c.eq.dVGH", "c.ueq.dVGH",
+ "c.olt.dVGH", "c.ult.dVGH", "c.ole.dVGH", "c.ule.dVGH",
+ "c.df.dVGH", "c.ngle.dVGH", "c.deq.dVGH", "c.ngl.dVGH",
+ "c.lt.dVGH", "c.nge.dVGH", "c.le.dVGH", "c.ngt.dVGH",
+}
+
+local map_cop1ps = {
+ shift = 0, mask = 63,
+ [0] = "add.psFGH", "sub.psFGH", "mul.psFGH", false,
+ false, "abs.psFG", "mov.psFG", "neg.psFG",
+ false, false, false, false,
+ false, false, false, false,
+ false,
+ { shift = 16, mask = 1, [0] = "movf.psFGC", "movt.psFGC" },
+ "movz.psFGT", "movn.psFGT",
+ false, false, false, false,
+ false, false, false, false,
+ false, false, false, false,
+ "cvt.s.puFG", false, false, false,
+ false, false, false, false,
+ "cvt.s.plFG", false, false, false,
+ "pll.psFGH", "plu.psFGH", "pul.psFGH", "puu.psFGH",
+ "c.f.psVGH", "c.un.psVGH", "c.eq.psVGH", "c.ueq.psVGH",
+ "c.olt.psVGH", "c.ult.psVGH", "c.ole.psVGH", "c.ule.psVGH",
+ "c.psf.psVGH", "c.ngle.psVGH", "c.pseq.psVGH", "c.ngl.psVGH",
+ "c.lt.psVGH", "c.nge.psVGH", "c.le.psVGH", "c.ngt.psVGH",
+}
+
+local map_cop1w = {
+ shift = 0, mask = 63,
+ [32] = "cvt.s.wFG", [33] = "cvt.d.wFG",
+}
+
+local map_cop1l = {
+ shift = 0, mask = 63,
+ [32] = "cvt.s.lFG", [33] = "cvt.d.lFG",
+}
+
+local map_cop1bc = {
+ shift = 16, mask = 3,
+ [0] = "bc1fCB", "bc1tCB", "bc1flCB", "bc1tlCB",
+}
+
+local map_cop1 = {
+ shift = 21, mask = 31,
+ [0] = "mfc1TG", false, "cfc1TG", "mfhc1TG",
+ "mtc1TG", false, "ctc1TG", "mthc1TG",
+ map_cop1bc, false, false, false,
+ false, false, false, false,
+ map_cop1s, map_cop1d, false, false,
+ map_cop1w, map_cop1l, map_cop1ps,
+}
+
+local map_cop1x = {
+ shift = 0, mask = 63,
+ [0] = "lwxc1FSX", "ldxc1FSX", false, false,
+ false, "luxc1FSX", false, false,
+ "swxc1FSX", "sdxc1FSX", false, false,
+ false, "suxc1FSX", false, "prefxMSX",
+ false, false, false, false,
+ false, false, false, false,
+ false, false, false, false,
+ false, false, "alnv.psFGHS", false,
+ "madd.sFRGH", "madd.dFRGH", false, false,
+ false, false, "madd.psFRGH", false,
+ "msub.sFRGH", "msub.dFRGH", false, false,
+ false, false, "msub.psFRGH", false,
+ "nmadd.sFRGH", "nmadd.dFRGH", false, false,
+ false, false, "nmadd.psFRGH", false,
+ "nmsub.sFRGH", "nmsub.dFRGH", false, false,
+ false, false, "nmsub.psFRGH", false,
+}
+
+local map_pri = {
+ [0] = map_special, map_regimm, "jJ", "jalJ",
+ "beq|beqz|bST00B", "bne|bnezST0B", "blezSB", "bgtzSB",
+ "addiTSI", "addiu|liTS0I", "sltiTSI", "sltiuTSI",
+ "andiTSU", "ori|liTS0U", "xoriTSU", "luiTU",
+ map_cop0, map_cop1, false, map_cop1x,
+ "beql|beqzlST0B", "bnel|bnezlST0B", "blezlSB", "bgtzlSB",
+ false, false, false, false,
+ map_special2, false, false, map_special3,
+ "lbTSO", "lhTSO", "lwlTSO", "lwTSO",
+ "lbuTSO", "lhuTSO", "lwrTSO", false,
+ "sbTSO", "shTSO", "swlTSO", "swTSO",
+ false, false, "swrTSO", "cacheNSO",
+ "llTSO", "lwc1HSO", "lwc2TSO", "prefNSO",
+ false, "ldc1HSO", "ldc2TSO", false,
+ "scTSO", "swc1HSO", "swc2TSO", false,
+ false, "sdc1HSO", "sdc2TSO", false,
+}
+
+------------------------------------------------------------------------------
+
+local map_gpr = {
+ [0] = "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
+ "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
+ "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
+ "r24", "r25", "r26", "r27", "gp", "sp", "r30", "ra",
+}
+
+------------------------------------------------------------------------------
+
+-- Output a nicely formatted line with an opcode and operands.
+local function putop(ctx, text, operands)
+ local pos = ctx.pos
+ local extra = ""
+ if ctx.rel then
+ local sym = ctx.symtab[ctx.rel]
+ if sym then extra = "\t->"..sym end
+ end
+ if ctx.hexdump > 0 then
+ ctx.out(format("%08x %s %-7s %s%s\n",
+ ctx.addr+pos, tohex(ctx.op), text, concat(operands, ", "), extra))
+ else
+ ctx.out(format("%08x %-7s %s%s\n",
+ ctx.addr+pos, text, concat(operands, ", "), extra))
+ end
+ ctx.pos = pos + 4
+end
+
+-- Fallback for unknown opcodes.
+local function unknown(ctx)
+ return putop(ctx, ".long", { "0x"..tohex(ctx.op) })
+end
+
+local function get_be(ctx)
+ local pos = ctx.pos
+ local b0, b1, b2, b3 = byte(ctx.code, pos+1, pos+4)
+ return bor(lshift(b0, 24), lshift(b1, 16), lshift(b2, 8), b3)
+end
+
+local function get_le(ctx)
+ local pos = ctx.pos
+ local b0, b1, b2, b3 = byte(ctx.code, pos+1, pos+4)
+ return bor(lshift(b3, 24), lshift(b2, 16), lshift(b1, 8), b0)
+end
+
+-- Disassemble a single instruction.
+local function disass_ins(ctx)
+ local op = ctx:get()
+ local operands = {}
+ local last = nil
+ ctx.op = op
+ ctx.rel = nil
+
+ local opat = map_pri[rshift(op, 26)]
+ while type(opat) ~= "string" do
+ if not opat then return unknown(ctx) end
+ opat = opat[band(rshift(op, opat.shift), opat.mask)] or opat._
+ end
+ local name, pat = match(opat, "^([a-z0-9_.]*)(.*)")
+ local altname, pat2 = match(pat, "|([a-z0-9_.|]*)(.*)")
+ if altname then pat = pat2 end
+
+ for p in gmatch(pat, ".") do
+ local x = nil
+ if p == "S" then
+ x = map_gpr[band(rshift(op, 21), 31)]
+ elseif p == "T" then
+ x = map_gpr[band(rshift(op, 16), 31)]
+ elseif p == "D" then
+ x = map_gpr[band(rshift(op, 11), 31)]
+ elseif p == "F" then
+ x = "f"..band(rshift(op, 6), 31)
+ elseif p == "G" then
+ x = "f"..band(rshift(op, 11), 31)
+ elseif p == "H" then
+ x = "f"..band(rshift(op, 16), 31)
+ elseif p == "R" then
+ x = "f"..band(rshift(op, 21), 31)
+ elseif p == "A" then
+ x = band(rshift(op, 6), 31)
+ elseif p == "M" then
+ x = band(rshift(op, 11), 31)
+ elseif p == "N" then
+ x = band(rshift(op, 16), 31)
+ elseif p == "C" then
+ x = band(rshift(op, 18), 7)
+ if x == 0 then x = nil end
+ elseif p == "K" then
+ x = band(rshift(op, 11), 31) + 1
+ elseif p == "L" then
+ x = band(rshift(op, 11), 31) - last + 1
+ elseif p == "I" then
+ x = arshift(lshift(op, 16), 16)
+ elseif p == "U" then
+ x = band(op, 0xffff)
+ elseif p == "O" then
+ local disp = arshift(lshift(op, 16), 16)
+ operands[#operands] = format("%d(%s)", disp, last)
+ elseif p == "X" then
+ local index = map_gpr[band(rshift(op, 16), 31)]
+ operands[#operands] = format("%s(%s)", index, last)
+ elseif p == "B" then
+ x = ctx.addr + ctx.pos + arshift(lshift(op, 16), 16)*4 + 4
+ ctx.rel = x
+ x = "0x"..tohex(x)
+ elseif p == "J" then
+ x = band(ctx.addr + ctx.pos, 0xf0000000) + band(op, 0x03ffffff)*4
+ ctx.rel = x
+ x = "0x"..tohex(x)
+ elseif p == "V" then
+ x = band(rshift(op, 8), 7)
+ if x == 0 then x = nil end
+ elseif p == "W" then
+ x = band(op, 7)
+ if x == 0 then x = nil end
+ elseif p == "Y" then
+ x = band(rshift(op, 6), 0x000fffff)
+ if x == 0 then x = nil end
+ elseif p == "Z" then
+ x = band(rshift(op, 6), 1023)
+ if x == 0 then x = nil end
+ elseif p == "0" then
+ if last == "r0" or last == 0 then
+ local n = #operands
+ operands[n] = nil
+ last = operands[n-1]
+ if altname then
+ local a1, a2 = match(altname, "([^|]*)|(.*)")
+ if a1 then name, altname = a1, a2
+ else name = altname end
+ end
+ end
+ elseif p == "1" then
+ if last == "ra" then
+ operands[#operands] = nil
+ end
+ else
+ assert(false)
+ end
+ if x then operands[#operands+1] = x; last = x end
+ end
+
+ return putop(ctx, name, operands)
+end
+
+------------------------------------------------------------------------------
+
+-- Disassemble a block of code.
+local function disass_block(ctx, ofs, len)
+ if not ofs then ofs = 0 end
+ local stop = len and ofs+len or #ctx.code
+ stop = stop - stop % 4
+ ctx.pos = ofs - ofs % 4
+ ctx.rel = nil
+ while ctx.pos < stop do disass_ins(ctx) end
+end
+
+-- Extended API: create a disassembler context. Then call ctx:disass(ofs, len).
+local function create_(code, addr, out)
+ local ctx = {}
+ ctx.code = code
+ ctx.addr = addr or 0
+ ctx.out = out or io.write
+ ctx.symtab = {}
+ ctx.disass = disass_block
+ ctx.hexdump = 8
+ ctx.get = get_be
+ return ctx
+end
+
+local function create_el_(code, addr, out)
+ local ctx = create_(code, addr, out)
+ ctx.get = get_le
+ return ctx
+end
+
+-- Simple API: disassemble code (a string) at address and output via out.
+local function disass_(code, addr, out)
+ create_(code, addr, out):disass()
+end
+
+local function disass_el_(code, addr, out)
+ create_el_(code, addr, out):disass()
+end
+
+-- Return register name for RID.
+local function regname_(r)
+ if r < 32 then return map_gpr[r] end
+ return "f"..(r-32)
+end
+
+-- Public module functions.
+module(...)
+
+create = create_
+create_el = create_el_
+disass = disass_
+disass_el = disass_el_
+regname = regname_
+
projects / thirdparty / LuaJIT.git / commitdiff
