mirror of https://github.com/decompals/wibo.git
98 lines
2.2 KiB
C++
98 lines
2.2 KiB
C++
#include "common.h"
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#include <asm/ldt.h>
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#include <errno.h>
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#include <memory>
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#include <sys/mman.h>
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#include <sys/syscall.h>
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uint32_t wibo::lastError = 0;
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char *wibo::commandLine;
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void stub() {
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// should go through all the functions imported by mwcceppc.exe
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// and create template stubs for them, at least...
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printf("Unhandled function\n");
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exit(0);
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}
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uint32_t __attribute__((stdcall)) CoInitialize(void *pvReserved) {
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printf("CoInitialize(...)\n");
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return 0; // S_OK I think?
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}
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void *wibo::resolveStubByName(const char *dllName, const char *funcName) {
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if (strcmp(dllName, "KERNEL32.dll") == 0) {
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void *func = wibo::resolveKernel32(funcName);
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if (func)
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return func;
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}
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if (strcmp(dllName, "ADVAPI32.dll") == 0) {
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void *func = wibo::resolveAdvApi32(funcName);
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if (func)
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return func;
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}
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if (strcmp(dllName, "ole32.dll") == 0) {
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if (strcmp(funcName, "CoInitialize") == 0) return (void *) CoInitialize;
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}
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printf("Missing function: %s (%s)\n", dllName, funcName);
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return (void *) stub;
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}
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void *wibo::resolveStubByOrdinal(const char *dllName, uint16_t ordinal) {
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return (void *) stub;
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}
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// Windows Thread Information Block
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struct TIB {
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void *sehFrame;
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void *stackBase;
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void *stackLimit;
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void *subSystemTib;
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void *fiberData;
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void *arbitraryDataSlot;
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TIB *tib;
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};
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int main(int argc, char **argv) {
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// Create TIB
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TIB tib;
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tib.tib = &tib;
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struct user_desc tibDesc;
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tibDesc.entry_number = 0;
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tibDesc.base_addr = (unsigned int) &tib;
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tibDesc.limit = 0x1000;
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tibDesc.seg_32bit = 1;
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tibDesc.contents = 0; // hopefully this is ok
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tibDesc.read_exec_only = 0;
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tibDesc.limit_in_pages = 0;
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tibDesc.seg_not_present = 0;
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tibDesc.useable = 1;
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if (syscall(SYS_modify_ldt, 1, &tibDesc, sizeof tibDesc) != 0) {
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perror("Failed to modify LDT\n");
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return 1;
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}
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// Build a command line (todo, fill this with argv etc)
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wibo::commandLine = new char[1024];
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strcpy(wibo::commandLine, "mwcceppc.exe");
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wibo::Executable exec;
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FILE *f = fopen("mwcceppc.exe", "rb");
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exec.loadPE(f);
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fclose(f);
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uint16_t tibSegment = (tibDesc.entry_number << 3) | 7;
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// Invoke the damn thing
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asm(
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"movw %0, %%fs; call *%1"
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:
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: "r"(tibSegment), "r"(exec.entryPoint)
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);
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printf("We came back\n");
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return 0;
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}
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