/*----------------------------------------------------------------------------*/
static void probe_def_init(void)
{
probes[0].name = "chrome probe";
probes[0].insert_loc.type = DR_PROBE_ADDR_LIB_OFFS;
probes[0].insert_loc.lib_offs.library = "../mutatee/chrome";
drsym_init(0);
{
size_t exe_export_offs;
drsym_error_t r = drsym_lookup_symbol("../mutatee/chrome", "doubler",&exe_export_offs, DRSYM_DEMANGLE);
if (r!=DRSYM_SUCCESS) {
dr_fprintf(STDERR, "<FAILED to find gpu::gles2::GLES2Implementation::Viewport\n");
} else {
dr_printf("<Found Original symbol>\n");
probes[0].insert_loc.lib_offs.offset = exe_export_offs;
}
}
//probes[0].insert_loc.lib_offs.offset = 0x50530;
probes[0].callback_func.type = DR_PROBE_ADDR_LIB_OFFS;
probes[0].callback_func.lib_offs.library = "libhooks.so";
{
size_t exe_export_offs;
drsym_error_t r = drsym_lookup_symbol("libhooks.so", "preHook",&exe_export_offs, DRSYM_DEMANGLE);
if (r!=DRSYM_SUCCESS) {
dr_fprintf(STDERR, "<FAILED to find gpu::gles2::GLES2Implementation::Viewport>\n");
} else {
dr_printf("<Found Hook symbol>\n");
probes[0].callback_func.lib_offs.offset = exe_export_offs;
}
}
drsym_exit();
/*
probes[0].callback_func.lib_offs.offset = 0xe30;
*/
}
/*
* Helper function for bulk use of drwrap.
*/
static void try_wrap_fn(const module_data_t *module, const char *name,
prewrapper_t pre, postwrapper_t post, bool *done)
{
if (*done)
return;
size_t offset;
drsym_error_t status = drsym_lookup_symbol(
module->full_path, name, &offset, DRSYM_DEFAULT_FLAGS);
if (status == DRSYM_SUCCESS) {
app_pc notify_fn = module->start + offset;
bool ok = drwrap_wrap(notify_fn, pre, post);
DR_ASSERT(ok);
*done = true;
}
}
static void
lookup_symbol(const char *dllpath, const char *sym)
{
size_t modoffs;
drsym_error_t symres;
if (verbose)
get_and_print_debug_kind(dllpath);
symres = drsym_lookup_symbol(dllpath, sym, &modoffs, DRSYM_DEMANGLE);
if (symres == DRSYM_SUCCESS || symres == DRSYM_ERROR_LINE_NOT_AVAILABLE) {
printf("+0x%x\n", (uint)modoffs);
} else {
if (verbose)
printf("drsym error %d looking up \"%s\" in \"%s\"\n", symres, sym, dllpath);
else
printf("??\n");
}
}
static void
symquery_lookup_symbol(const char *dllpath, const char *sym)
{
size_t modoffs;
drsym_error_t symres;
if (verbose)
get_and_print_debug_kind(dllpath);
symres = drsym_lookup_symbol(dllpath, sym, &modoffs, demangle_flags);
if (symres == DRSYM_SUCCESS || symres == DRSYM_ERROR_LINE_NOT_AVAILABLE) {
printf("+"SIZE_FMTX"\n", modoffs);
} else {
if (verbose)
printf("drsym error %d looking up \"%s\" in \"%s\"\n", symres, sym, dllpath);
else
printf("??\n");
}
}
static void
process_symbols(void *dcontext, char *dllname, LOADED_IMAGE *img)
{
/* We have to specify the module via "modname!symname".
* We must use the same modname as in full_path.
*/
char fullpath[MAX_PATH];
# define MAX_SYM_WITH_MOD_LEN 256
char sym_with_mod[MAX_SYM_WITH_MOD_LEN];
int len;
drsym_error_t symres;
char *fname = NULL, *c;
search_data_t sd;
if (drsym_init(NULL) != DRSYM_SUCCESS) {
print("WARNING: unable to initialize symbol engine\n");
return;
}
if (dllname == NULL)
return;
fname = dllname;
for (c = dllname; *c != '\0'; c++) {
if (*c == '/' || *c == '\\')
fname = c + 1;
}
assert(fname != NULL && "unable to get fname for module");
if (fname == NULL)
return;
/* now get rid of extension */
for (; c > fname && *c != '.'; c--)
; /* nothing */
assert(c > fname && "file has no extension");
assert(c - fname < BUFFER_SIZE_ELEMENTS(sym_with_mod) && "sizes way off");
len = dr_snprintf(sym_with_mod, BUFFER_SIZE_ELEMENTS(sym_with_mod), "%.*s!%s",
c - fname, fname, SYM_PATTERN);
assert(len > 0 && "error printing modname!symname");
NULL_TERMINATE_BUFFER(sym_with_mod);
len = GetFullPathName(dllname, BUFFER_SIZE_ELEMENTS(fullpath), fullpath, NULL);
assert(len > 0);
NULL_TERMINATE_BUFFER(dllname);
if (list_usercalls) {
int i;
for (i = 0; i < NUM_USERCALL; i++) {
size_t offs;
symres = drsym_lookup_symbol(fullpath, usercall_names[i], &offs, 0);
if (symres == DRSYM_SUCCESS) {
usercall_addr[i] = ImageRvaToVa(img->FileHeader, img->MappedAddress,
(ULONG)offs, NULL);
verbose_print("%s = %d +0x%x == "PFX"\n", usercall_names[i], symres,
offs, usercall_addr[i]);
} else {
dr_printf("Error locating usercall %s: aborting\n", usercall_names[i]);
return;
}
}
}
sd.dcontext = dcontext;
sd.img = img;
sd.modpath = fullpath;
verbose_print("Searching \"%s\" for \"%s\"\n", fullpath, sym_with_mod);
symres = drsym_search_symbols(fullpath, sym_with_mod, true, search_syms_cb, &sd);
if (symres != DRSYM_SUCCESS)
print("Error %d searching \"%s\" for \"%s\"\n", symres, fullpath, sym_with_mod);
drsym_exit();
}
