1 files changed, 200 insertions, 0 deletions
diff --git a/src/box64context.c b/src/box64context.c
new file mode 100755
index 00000000..21768fb2
--- /dev/null
+++ b/src/box64context.c
@@ -0,0 +1,200 @@
+#define _GNU_SOURCE         /* See feature_test_macros(7) */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dlfcn.h>
+#include <signal.h>
+#include <sys/mman.h>
+
+#include "box64context.h"
+#include "debug.h"
+
+
+EXPORTDYN
+void initAllHelpers(box64context_t* context)
+{
+    static int inited = 0;
+    if(inited)
+        return;
+    my_context = context;
+    //init_pthread_helper();
+    //init_signal_helper(context);
+    inited = 1;
+}
+
+EXPORTDYN
+void finiAllHelpers(box64context_t* context)
+{
+    static int finied = 0;
+    if(finied)
+        return;
+    //fini_pthread_helper(context);
+    //fini_signal_helper();
+    //cleanAlternate();
+    //fini_custommem_helper(context);
+    finied = 1;
+}
+
+/// maxval not inclusive
+int getrand(int maxval)
+{
+    if(maxval<1024) {
+        return ((random()&0x7fff)*maxval)/0x7fff;
+    } 
+        uint64_t r = random();
+        r = (r*maxval) / RAND_MAX;
+        return r;
+
+}
+
+void free_tlsdatasize(void* p)
+{
+    if(!p)
+        return;
+    tlsdatasize_t *data = (tlsdatasize_t*)p;
+    free(data->tlsdata);
+    free(p);
+}
+
+EXPORTDYN
+box64context_t *NewBox64Context(int argc)
+{
+#ifdef BUILD_DYNAMIC
+    if(my_context) {
+        ++my_context->count;
+        return my_context;
+    }
+#endif
+    // init and put default values
+    box64context_t *context = my_context = (box64context_t*)calloc(1, sizeof(box64context_t));
+
+    context->deferedInit = 1;
+    context->sel_serial = 1;
+
+    //init_custommem_helper(context);
+
+    context->box64lib = dlopen(NULL, RTLD_NOW|RTLD_GLOBAL);
+    //context->dlprivate = NewDLPrivate();
+
+    context->argc = argc;
+    context->argv = (char**)calloc(context->argc+1, sizeof(char*));
+
+    for (int i=0; i<4; ++i) context->canary[i] = 1 +  getrand(255);
+    context->canary[getrand(4)] = 0;
+    printf_log(LOG_DEBUG, "Setting up canary (for Stack protector) at GS:0x14, value:%08X\n", *(uint32_t*)context->canary);
+
+    initAllHelpers(context);
+
+    return context;
+}
+
+EXPORTDYN
+void FreeBox64Context(box64context_t** context)
+{
+    if(!context)
+        return;
+    
+    box64context_t* ctx = *context;   // local copy to do the cleanning
+
+    FreeCollection(&ctx->box64_path);
+    FreeCollection(&ctx->box64_ld_lib);
+    FreeCollection(&ctx->box64_emulated_libs);
+    // stop trace now
+    /*if(ctx->dec)
+        DeleteX86TraceDecoder(&ctx->dec);
+    if(ctx->zydis)
+        DeleteX86Trace(ctx);*/
+
+    free(ctx->argv);
+    
+    for (int i=0; i<ctx->envc; ++i)
+        free(ctx->envv[i]);
+    free(ctx->envv);
+
+    for(int i=0; i<MAX_SIGNAL; ++i)
+        if(ctx->signals[i]!=0 && ctx->signals[i]!=1) {
+            signal(i, SIG_DFL);
+        }
+
+    *context = NULL;                // bye bye my_context
+
+    //CleanStackSize(ctx);
+
+#ifndef BUILD_LIB
+    if(ctx->box64lib)
+        dlclose(ctx->box64lib);
+#endif
+
+    //FreeDLPrivate(&ctx->dlprivate);
+
+    free(ctx->stack);
+
+    free(ctx->fullpath);
+    free(ctx->box64path);
+
+    void* ptr;
+    if ((ptr = pthread_getspecific(ctx->tlskey)) != NULL) {
+        free_tlsdatasize(ptr);
+        pthread_setspecific(ctx->tlskey, NULL);
+    }
+    pthread_key_delete(ctx->tlskey);
+
+    if(ctx->tlsdata)
+        free(ctx->tlsdata);
+
+    finiAllHelpers(ctx);
+
+    free(ctx);
+}
+/*
+int AddElfHeader(box64context_t* ctx, elfheader_t* head) {
+    int idx = ctx->elfsize;
+    if(idx==ctx->elfcap) {
+        // resize...
+        ctx->elfcap += 16;
+        ctx->elfs = (elfheader_t**)realloc(ctx->elfs, sizeof(elfheader_t*) * ctx->elfcap);
+    }
+    ctx->elfs[idx] = head;
+    ctx->elfsize++;
+    printf_log(LOG_DEBUG, "Adding \"%s\" as #%d in elf collection\n", ElfName(head), idx);
+    return idx;
+}
+*/
+int AddTLSPartition(box64context_t* context, int tlssize) {
+    int oldsize = context->tlssize;
+    context->tlssize += tlssize;
+    context->tlsdata = realloc(context->tlsdata, context->tlssize);
+    memmove(context->tlsdata+tlssize, context->tlsdata, oldsize);   // move to the top, using memmove as regions will probably overlap
+    memset(context->tlsdata, 0, tlssize);           // fill new space with 0 (not mandatory)
+    // clean GS segment for current emu
+    if(my_context) {
+        //ResetSegmentsCache(thread_get_emu());
+        if(!(++context->sel_serial))
+            ++context->sel_serial;
+    }
+
+    return -context->tlssize;   // negative offset
+}
+/*
+void add_neededlib(needed_libs_t* needed, library_t* lib)
+{
+    if(!needed)
+        return;
+    if(needed->size == needed->cap) {
+        needed->cap += 8;
+        needed->libs = (library_t**)realloc(needed->libs, needed->cap*sizeof(library_t*));
+    }
+    needed->libs[needed->size++] = lib;
+}
+
+void free_neededlib(needed_libs_t* needed)
+{
+    if(!needed)
+        return;
+    needed->cap = 0;
+    needed->size = 0;
+    if(needed->libs)
+        free(needed->libs);
+    needed->libs = NULL;
+}
+*/
\ No newline at end of file