void
ntdll_redir_init(void)
{
uint i;
ntdll_table =
strhash_hash_create(GLOBAL_DCONTEXT,
hashtable_num_bits(REDIRECT_NTDLL_NUM*2),
80 /* load factor: not perf-critical, plus static */,
HASHTABLE_SHARED | HASHTABLE_PERSISTENT,
NULL _IF_DEBUG("ntdll redirection table"));
TABLE_RWLOCK(ntdll_table, write, lock);
for (i = 0; i < REDIRECT_NTDLL_NUM; i++) {
strhash_hash_add(GLOBAL_DCONTEXT, ntdll_table, redirect_ntdll[i].name,
(void *) redirect_ntdll[i].func);
}
TABLE_RWLOCK(ntdll_table, write, unlock);
if (get_os_version() >= WINDOWS_VERSION_7) {
ntdll_win7_table =
strhash_hash_create(GLOBAL_DCONTEXT, REDIRECT_NTDLL_WIN7_NUM*2,
80 /* load factor: not perf-critical, plus static */,
HASHTABLE_SHARED | HASHTABLE_PERSISTENT,
NULL _IF_DEBUG("ntdll win7 redirection table"));
TABLE_RWLOCK(ntdll_win7_table, write, lock);
for (i = 0; i < REDIRECT_NTDLL_WIN7_NUM; i++) {
strhash_hash_add(GLOBAL_DCONTEXT, ntdll_win7_table,
redirect_ntdll_win7[i].name,
(void *) redirect_ntdll_win7[i].func);
}
TABLE_RWLOCK(ntdll_win7_table, write, unlock);
}
}
app_pc
advapi32_redir_lookup(const char *name)
{
app_pc res;
TABLE_RWLOCK(advapi32_table, read, lock);
res = strhash_hash_lookup(GLOBAL_DCONTEXT, advapi32_table, name);
TABLE_RWLOCK(advapi32_table, read, unlock);
return res;
}
static callee_info_t *
callee_info_table_lookup(void *callee)
{
callee_info_t *ci;
TABLE_RWLOCK(callee_info_table, read, lock);
ci = generic_hash_lookup(GLOBAL_DCONTEXT, callee_info_table, (ptr_uint_t)callee);
TABLE_RWLOCK(callee_info_table, read, unlock);
/* We only delete the callee_info from the callee_info_table
* when destroy the table on exit, so we can keep the ci
* without holding the lock.
*/
return ci;
}
app_pc
ntdll_redir_lookup(const char *name)
{
app_pc res;
if (ntdll_win7_table != NULL) {
TABLE_RWLOCK(ntdll_win7_table, read, lock);
res = strhash_hash_lookup(GLOBAL_DCONTEXT, ntdll_win7_table, name);
TABLE_RWLOCK(ntdll_win7_table, read, unlock);
if (res != NULL)
return res;
}
TABLE_RWLOCK(ntdll_table, read, lock);
res = strhash_hash_lookup(GLOBAL_DCONTEXT, ntdll_table, name);
TABLE_RWLOCK(ntdll_table, read, unlock);
return res;
}
void
advapi32_redir_init(void)
{
uint i;
advapi32_table =
strhash_hash_create(GLOBAL_DCONTEXT,
hashtable_num_bits(REDIRECT_ADVAPI32_NUM*2),
80 /* load factor: not perf-critical, plus static */,
HASHTABLE_SHARED | HASHTABLE_PERSISTENT,
NULL _IF_DEBUG("advapi32 redirection table"));
TABLE_RWLOCK(advapi32_table, write, lock);
for (i = 0; i < REDIRECT_ADVAPI32_NUM; i++) {
strhash_hash_add(GLOBAL_DCONTEXT, advapi32_table, redirect_advapi32[i].name,
(void *) redirect_advapi32[i].func);
}
TABLE_RWLOCK(advapi32_table, write, unlock);
}
static callee_info_t *
callee_info_table_add(callee_info_t *ci)
{
callee_info_t *info;
TABLE_RWLOCK(callee_info_table, write, lock);
info = generic_hash_lookup(GLOBAL_DCONTEXT, callee_info_table, (ptr_uint_t)ci->start);
if (info == NULL) {
info = ci;
generic_hash_add(GLOBAL_DCONTEXT, callee_info_table, (ptr_uint_t)ci->start,
(void *)ci);
} else {
/* Have one in the table, free the new one and use existing one.
* We cannot free the existing one in the table as it might be used by
* other thread without holding the lock.
* Since we assume callee should never be changed, they should have
* the same content of ci.
*/
callee_info_free(GLOBAL_DCONTEXT, ci);
}
TABLE_RWLOCK(callee_info_table, write, unlock);
return info;
}