449 lines
9.3 KiB
C++
449 lines
9.3 KiB
C++
#include <stdio.h>
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#include <unistd.h>
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#include <dlfcn.h>
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#include <fcntl.h>
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#include <math.h>
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#include "gdc.h"
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#include "GameConfigs.h"
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#include "MemoryUtils.h"
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MemoryUtils mu;
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char *game = NULL;
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char *engine = NULL;
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char *game_binary = NULL;
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char *engine_binary = NULL;
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char *wgame_binary = NULL;
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char *wengine_binary = NULL;
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int main(int argc, char **argv)
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{
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char *gamedata = NULL;
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bool debug = false;
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opterr = 0;
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int opt;
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while ((opt = getopt(argc, argv, "b:de:f:g:x:w:y:")) != -1)
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switch (opt)
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{
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case 'd':
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debug = true;
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break;
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case 'g':
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game = optarg;
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break;
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case 'e':
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engine = optarg;
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break;
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case 'f':
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gamedata = optarg;
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break;
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case 'b':
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game_binary = optarg;
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break;
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case 'x':
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engine_binary = optarg;
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break;
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case 'w':
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wgame_binary = optarg;
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break;
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case 'y':
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wengine_binary = optarg;
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break;
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case '?':
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printf("Usage: ./gdc -g <game> -e <engine name> -f <gamedata file> -b <game binary> -x <engine binary> -w <win game binary> -y <win engine binary>\n");
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return 0;
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default:
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printf("WHAT\n");
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return 0;
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}
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if (!game || !engine || !gamedata || !game_binary || !engine_binary || !wgame_binary || !wengine_binary)
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{
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printf("Usage: ./gdc -g <game> -e <engine name> -f <gamedata file> -b <game binary> -x <engine binary> -w <win game binary> -y <win engine binary>\n");
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return 0;
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}
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printf("Game: %s\n", game);
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if (debug)
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{
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printf("Engine: %s\nGame binary: %s\nEngine binary: %s\nWin game binary: %s\nWin engine binary: %s\n",
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engine, game_binary, engine_binary, wgame_binary, wengine_binary
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);
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}
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printf("Gamedata: %s\n\n", gamedata);
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void *ghandle;
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ghandle = dlopen(game_binary, RTLD_LAZY);
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if (!ghandle)
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{
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printf("Couldn't open %s (%s)\n", game_binary, dlerror());
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return 0;
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}
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void *ehandle;
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ehandle = dlopen(engine_binary, RTLD_LAZY);
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if (!ehandle)
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{
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printf("Couldn't open %s (%s)\n", engine_binary, dlerror());
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return 0;
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}
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int wgfile = open(wgame_binary, O_RDONLY);
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if (wgfile == -1)
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{
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printf("Couldn't open %s\n", wgame_binary);
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return 0;
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}
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int wefile = open(wengine_binary, O_RDONLY);
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if (wefile == -1)
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{
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printf("Couldn't open %s\n", wengine_binary);
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return 0;
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}
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CGameConfig gc;
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char err[512];
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if (!gc.EnterFile(gamedata, err, sizeof(err)))
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{
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printf("%s: %s\n", gamedata, err);
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return 0;
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}
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CGameConfig symbols;
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if (!symbols.EnterFile("symbols.txt", err, sizeof(err)))
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{
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printf("symbols.txt: %s\n", err);
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return 0;
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}
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const char *vtsym = symbols.GetKeyValue("vtsym");
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if (!vtsym)
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{
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printf("Couldn't find vtsym\n");
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return 0;
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}
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void **vt = (void**) mu.ResolveSymbol(ghandle, vtsym);
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if (!vt)
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{
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printf("Couldn't find vtable %s\n", vtsym);
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dlclose(ghandle);
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dlclose(ehandle);
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close(wgfile);
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close(wefile);
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return 0;
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}
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for (list<Offset>::iterator it = gc.m_Offsets.begin(); it != gc.m_Offsets.end(); it++)
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{
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if (debug)
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{
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printf("DEBUG %s - l: %d w: %d\n", it->name, it->lin, it->win);
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}
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const char *symbol = symbols.GetKeyValue(it->name);
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if (symbol)
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{
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int newOffset;
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char symvt[128];
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strcpy(symvt, it->name);
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strcat(symvt, "_vt");
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const char *newvtsym = symbols.GetKeyValue(symvt);
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if (newvtsym && newvtsym[0])
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{
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void **newvt = (void**) mu.ResolveSymbol(ghandle, newvtsym);
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if (!newvt)
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{
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printf("O: %-22s - can't find, skipping\n", symvt);
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continue;
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}
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newOffset = findVFunc(ghandle, newvt, symbol);
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}
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else
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{
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newOffset = findVFunc(ghandle, vt, symbol);
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}
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if (newOffset == it->lin)
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{
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printf("O: %-22s - GOOD. current [ w: %3d, l: %3d ].\n", it->name, it->win, it->lin);
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}
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else
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{
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printf("O: %-22s - CHANGED. old [ w: %3d, l: %3d ]. new [ w: %3d, l: %3d ].\n",
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it->name,
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it->win, it->lin,
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newOffset - (it->lin - it->win), newOffset
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);
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}
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}
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else // !symbol
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{
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printf("O: %-22s - no Linux symbol, skipping\n", it->name);
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}
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}
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printf("\nWindows offsets are (semi-)wild guesses!\n\n");
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for (list<Sig>::iterator it = gc.m_Sigs.begin(); it != gc.m_Sigs.end(); it++)
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{
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if (debug)
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{
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printf("DEBUG %s - %s - l: %s\n", it->name, it->lib == Server ? "server" : "engine", it->lin);
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}
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const char *linSymbol = it->lin;
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const char *winSymbol = it->win;
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bool hasLinux = (linSymbol && linSymbol[0]);
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bool hasWindows = (winSymbol && winSymbol[0]);
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if (!hasLinux && !hasWindows)
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{
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printf("S: %-22s - hasn't linux nor windows data, skipping\n", it->name);
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continue;
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}
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int winFile;
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void *linHandle;
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if (it->lib == Server)
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{
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winFile = wgfile;
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linHandle = ghandle;
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}
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else if (it->lib == Engine)
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{
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winFile = wefile;
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linHandle = ehandle;
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}
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else
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{
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printf("S: %-22s - isn't from server nor engine, skipping\n", it->name);
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continue;
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}
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bool foundLinux = (!hasLinux || checkSigStringL(linHandle, linSymbol));
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bool foundWindows = (!hasWindows || checkSigStringW(winFile, winSymbol));
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// Prepare for ternery ABUSE
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if (foundLinux && foundWindows)
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{
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// too much clutter to print current data if it matches anyway, unlike with offsets
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/*
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printf("%-22s (%s) - GOOD. current:\n\t[w:%s]\n\t[l:%s]\n",
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it->name,
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(it->lib == Server) ? "server" : "engine",
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winSymbol ? winSymbol : "",
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linSymbol ? linSymbol : ""
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);
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*/
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printf("S: %-22s (%s) - GOOD.\n",
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it->name,
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(it->lib == Server) ? "server" : "engine"
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);
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}
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else
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{
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// extra \n at end is intentional to add buffer after possibly long sigs
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printf("S: %-22s (%s) - w: %s - l: %s\n%s%s%s%s%s%s%s%s\n",
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it->name,
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(it->lib == Server) ? "server" : "engine",
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hasWindows ? (foundWindows ? "GOOD" : "CHANGED") : "UNKNOWN",
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hasLinux ? (foundLinux ? "GOOD" : "CHANGED") : "UNKNOWN",
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hasWindows ? "\tcurrent - w: " : "",
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(hasWindows && foundWindows) ? " (found) \"" : (hasWindows ? "(NOT found) \"" : ""),
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(hasWindows && winSymbol) ? winSymbol : "",
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hasWindows ? "\"\n" : "",
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hasLinux ? "\tcurrent - l: " : "",
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(hasLinux && foundLinux) ? " (found) \"" : (hasLinux ? "(NOT found) \"" : ""),
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(hasLinux && linSymbol) ? linSymbol : "",
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hasLinux ? "\"\n" : ""
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);
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}
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// j/k, no way that anyone could have been prepared for that
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}
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return 0;
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}
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bool checkSigStringW(int file, const char* symbol)
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{
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void *addr = NULL;
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bool isAt = (symbol[0] == '@');
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// we can't support this on windows from here
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if (isAt)
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return false;
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unsigned char real_sig[511];
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size_t real_bytes = UTIL_DecodeHexString(real_sig, sizeof(real_sig), symbol);
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if (real_bytes >= 1)
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{
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addr = mu.FindPatternInFile(file, (char*)real_sig, real_bytes);
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}
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if (addr)
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return true;
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return false;
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}
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bool checkSigStringL(void *handle, const char* symbol)
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{
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void *addr = NULL;
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bool isAt = (symbol[0] == '@');
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if (isAt)
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{
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addr = mu.ResolveSymbol(handle, symbol + 1);
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}
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else
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{
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unsigned char real_sig[511];
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size_t real_bytes = UTIL_DecodeHexString(real_sig, sizeof(real_sig), symbol);
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if (real_bytes >= 1)
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{
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addr = mu.FindPattern(handle, (char*)real_sig, real_bytes);
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}
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}
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if (addr)
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return true;
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return false;
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}
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/*
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takes a mangled member function symbol and returns the position where the function name and parameters start
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01234567890123456789012345678
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_ZN9CTFPlayer12ForceRespawnEv
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^13 ^28
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*/
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void findFuncPos(const char *sym, int &func, int ¶ms)
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{
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int i = 0;
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while ((sym[i] < '0') || (sym[i] > '9')) i++;
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int classLen = atoi(sym + i);
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func = i + (int)ceil(log10(classLen)) + classLen;
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int funcLen = atoi(sym + func);
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params = func + (int)ceil(log10(funcLen)) + funcLen;
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}
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int findVFunc(void *handle, void **vt, const char *symbol)
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{
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int offset = 1;
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int funcPos, paramPos;
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findFuncPos(symbol, funcPos, paramPos);
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for (int i = 0; i < 1000; i++)
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{
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void *pFunc = vt[i];
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const char *s;
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if (!(s = mu.ResolveAddr(handle, pFunc)))
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continue;
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if ((i > 1) && (strncmp(s, "_ZTI", 4) == 0))
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break;
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int tempFuncPos, tempParamPos;
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findFuncPos(s, tempFuncPos, tempParamPos);
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if (strcmp(s + tempFuncPos, symbol + funcPos) == 0)
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{
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offset = i;
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break;
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}
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}
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return offset - 2;
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}
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unsigned int strncopy(char *dest, const char *src, size_t count)
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{
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if (!count)
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{
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return 0;
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}
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char *start = dest;
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while ((*src) && (--count))
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{
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*dest++ = *src++;
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}
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*dest = '\0';
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return (dest - start);
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}
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size_t UTIL_Format(char *buffer, size_t maxlength, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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size_t len = vsnprintf(buffer, maxlength, fmt, ap);
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va_end(ap);
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if (len >= maxlength)
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{
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buffer[maxlength - 1] = '\0';
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return (maxlength - 1);
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}
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else
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{
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return len;
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}
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}
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size_t UTIL_DecodeHexString(unsigned char *buffer, size_t maxlength, const char *hexstr)
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{
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size_t written = 0;
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size_t length = strlen(hexstr);
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for (size_t i = 0; i < length; i++)
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{
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if (written >= maxlength)
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break;
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buffer[written++] = hexstr[i];
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if (hexstr[i] == '\\' && hexstr[i + 1] == 'x')
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{
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if (i + 3 >= length)
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continue;
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/* Get the hex part. */
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char s_byte[3];
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int r_byte;
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s_byte[0] = hexstr[i + 2];
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s_byte[1] = hexstr[i + 3];
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s_byte[2] = '\0';
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/* Read it as an integer */
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sscanf(s_byte, "%x", &r_byte);
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/* Save the value */
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buffer[written - 1] = r_byte;
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/* Adjust index */
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i += 3;
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}
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}
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return written;
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}
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