about summary refs log tree commit diff
path: root/src/init.go
diff options
context:
space:
mode:
Diffstat (limited to 'src/init.go')
-rw-r--r--src/init.go230
1 files changed, 0 insertions, 230 deletions
diff --git a/src/init.go b/src/init.go
deleted file mode 100644
index ee6db87..0000000
--- a/src/init.go
+++ /dev/null
@@ -1,230 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"math/rand"
-	"strings"
-	"time"
-
-	r2pipe "github.com/radare/r2pipe-go"
-	"github.com/sirupsen/logrus"
-)
-
-func buildBots(config *Config) {
-
-	logrus.Info("Building all bots")
-
-	// build all the bots
-	for i := 0; i < config.AmountOfBots; i++ {
-		buildBot(i, config)
-	}
-}
-
-// buildBot builds the bot located at the given path.
-func buildBot(i int, config *Config) {
-
-	logrus.Debugf("Building bot %d", i)
-
-	// open radare without input for building the bot
-	r2p1, err := r2pipe.NewPipe("--")
-	if err != nil {
-		panic(err)
-	}
-	defer r2p1.Close()
-
-	// Compile a warrior using rasm2
-	//
-	// This uses the given architecture, the given bitness and the given path in
-	// rasm2 to compile the bot
-	botPath := config.Bots[i].Path
-	radareCommand := fmt.Sprintf("rasm2 -a %s -b %d -f %s", config.Arch, config.Bits, botPath)
-	botSource := r2cmd(r2p1, radareCommand)
-
-	config.Bots[i].Source = botSource
-}
-
-// init initializes the arena
-func initArena(config *Config) *r2pipe.Pipe {
-
-	logrus.Info("Initializing the arena")
-	logrus.Debugf("Allocating %d bytes of memory...", config.Memsize)
-
-	// allocate memory
-	r2p, err := r2pipe.NewPipe(fmt.Sprintf("malloc://%d", config.Memsize))
-	if err != nil {
-		panic(err)
-	}
-
-	logrus.Info("Memoy successfully allocated")
-
-	// define the architecture and the bitness
-	_ = r2cmd(r2p, fmt.Sprintf("e asm.arch = %s", config.Arch))
-	_ = r2cmd(r2p, fmt.Sprintf("e asm.bits = %d", config.Bits))
-
-	// enable colors
-	// _ = r2cmd(r2p, "e scr.color = 0")
-	_ = r2cmd(r2p, "e scr.color = 3")
-	_ = r2cmd(r2p, "e scr.color.args = true")
-	_ = r2cmd(r2p, "e scr.color.bytes = true")
-	_ = r2cmd(r2p, "e scr.color.grep = true")
-	_ = r2cmd(r2p, "e scr.color.ops = true")
-	_ = r2cmd(r2p, "e scr.bgfill = true")
-	_ = r2cmd(r2p, "e scr.color.pipe = true")
-	_ = r2cmd(r2p, "e scr.utf8 = true")
-
-	// hex column width
-	_ = r2cmd(r2p, "e hex.cols = 32")
-
-	// initialize ESIL VM state
-	logrus.Debug("Initializing the ESIL VM")
-	_ = r2cmd(r2p, "aei")
-
-	// initialize ESIL VM stack
-	logrus.Debug("Initializing the ESIL Stack")
-	_ = r2cmd(r2p, "aeim")
-
-	// return the pipe
-	return r2p
-}
-
-// genRandomOffsets returns random offsets for all bots
-// This is used to get the offset the bots are initially placed in
-func genRandomOffsets(config *Config) {
-
-	logrus.Info("Generating random bot offsets")
-
-	// define the amount of bots, an array to store the offsets in and a counter
-	// to store the amount of tries it took to find a random positon for the bots
-	var amountOfBots int = len(config.Bots)
-	var offsets []int
-	var roundCounter int = 0
-
-	// seed the random number generator
-	rand.Seed(time.Now().UTC().UnixNano())
-
-	for {
-
-		// reset the offsets array
-		offsets = []int{}
-
-		// define a random address
-		// | ------------------------------------- | ----- |
-		// | generate an address in this space
-		address := rand.Intn(config.Memsize - config.MaxProgSize)
-		logrus.Tracef("%d", address)
-
-		// for all bots, try to generate another random address after the intially
-		// generated address and test if it fits in memory
-		for i := 0; i < amountOfBots; i++ {
-
-			// append the address to the offsets array
-			offsets = append(offsets, address)
-
-			// define a min and max bound
-			//
-			// | ------|-|----------------------------------|-|
-			// |       | |           in this space          | |
-			// a       b c                                  d e
-			//
-			// a = 0x0
-			// b = address
-			// c = address + config.MaxProcSize (min)
-			// d = config.Memsize - config.MaxProgSize (max)
-			// e = config.Memsize
-			min := address + config.MaxProgSize
-			max := config.Memsize - config.MaxProgSize
-
-			// if the new minimum bound is bigger or equal to the maximum bound,
-			// discard this try and start with a fresh new initial address
-			if min >= max {
-				roundCounter++
-				break
-			}
-
-			// generate a new address in the [min, max) range defined above
-			address = rand.Intn(max-min) + min
-			logrus.Tracef("%d", address)
-
-			// If there isn't enough space inbetween the address and the biggest
-			// possible address, as in, the biggest possible bot can't fit in that
-			// space, discard and start with a new fresh initial address
-			if (config.Memsize-config.MaxProgSize)-address < config.MaxProgSize {
-				roundCounter++
-				break
-			}
-		}
-
-		// if the needed amount of offsets has been found, break out of the infinite loop
-		if len(offsets) == amountOfBots {
-			break
-		}
-	}
-
-	logrus.Infof("Initial bot positions found after %d tries", roundCounter)
-
-	// debug print all offsets
-	var fields0 logrus.Fields = make(logrus.Fields)
-	for i := 0; i < len(offsets); i++ {
-		fields0[fmt.Sprintf("%d", i)] = offsets[i]
-	}
-	logrus.WithFields(fields0).Debug("Offsets")
-
-	// shuffle the offsets
-	rand.Shuffle(len(offsets), func(i, j int) {
-		offsets[i], offsets[j] = offsets[j], offsets[i]
-	})
-
-	// debug print the shuffled offsets
-	var fields1 logrus.Fields = make(logrus.Fields)
-	for i := 0; i < len(offsets); i++ {
-		fields1[fmt.Sprintf("%d", i)] = offsets[i]
-	}
-	logrus.WithFields(fields1).Debug("Shuffled offsets")
-
-	config.RandomOffsets = offsets
-}
-
-// place the bot in the arena at the given address
-func placeBot(r2p *r2pipe.Pipe, bot Bot, address int) {
-	_ = r2cmd(r2p, fmt.Sprintf("wx %s @ %d", bot.Source, address))
-}
-
-func placeBots(r2p *r2pipe.Pipe, config *Config) {
-
-	logrus.Info("Placing the bots in the arena")
-
-	// place each bot in the arena
-	for bot := 0; bot < len(config.Bots); bot++ {
-
-		// get the address where the bot should be placed
-		address := config.RandomOffsets[bot]
-
-		// Place the bot in the arena
-		logrus.Debugf("[i] Placing bot %d at %d", bot, address)
-		placeBot(r2p, config.Bots[bot], address)
-
-		logrus.Debugf("\n%s", r2cmd(r2p, fmt.Sprintf("pd 0x8 @ %d", address)))
-
-		// store the initial address of the bot in the according struct field
-		config.Bots[bot].Addr = address
-
-		// define the instruction point and the stack pointer
-		_ = r2cmd(r2p, fmt.Sprintf("aer PC=%d", config.Bots[bot].Addr))
-		_ = r2cmd(r2p, fmt.Sprintf("aer SP=SP+%d", config.Bots[bot].Addr))
-
-		// dump the registers of the bot for being able to switch inbetween them
-		// This is done in order to be able to play one step of each bot at a time,
-		// but sort of in parallel
-		initialRegisers := strings.Replace(r2cmd(r2p, "aerR"), "\n", ";", -1)
-		config.Bots[bot].Regs = initialRegisers
-	}
-}
-
-func defineErrors(r2p *r2pipe.Pipe) {
-	// handle errors in esil
-	_ = r2cmd(r2p, "e cmd.esil.todo=f theend=1")
-	_ = r2cmd(r2p, "e cmd.esil.trap=f theend=1")
-	_ = r2cmd(r2p, "e cmd.esil.intr=f theend=1")
-	_ = r2cmd(r2p, "e cmd.esil.ioer=f theend=1")
-	_ = r2cmd(r2p, "f theend=0")
-}
generated by cgit-pink 1.4.1
rss feed of @hanemile@chaos.social mastodon lieu webring search engine XXIIVV webring activitypub