mirror of
https://github.com/radareorg/radare2.git
synced 2024-12-04 19:47:31 +00:00
362 lines
8.6 KiB
C
362 lines
8.6 KiB
C
/* radare2 - LGPL - Copyright 2017-2018 - condret, alvaro */
|
|
|
|
#include <r_io.h>
|
|
#include <r_types.h>
|
|
#include <string.h>
|
|
|
|
const ut64 cleanup_masks[] = {
|
|
0x0000000000000001,
|
|
0x0000000000000003,
|
|
0x0000000000000007,
|
|
0x000000000000000f,
|
|
0x000000000000001f,
|
|
0x000000000000003f,
|
|
0x000000000000007f,
|
|
0x00000000000000ff,
|
|
0x00000000000001ff,
|
|
0x00000000000003ff,
|
|
0x00000000000007ff,
|
|
0x0000000000000fff,
|
|
0x0000000000001fff,
|
|
0x0000000000003fff,
|
|
0x0000000000007fff,
|
|
0x000000000000ffff,
|
|
0x000000000001ffff,
|
|
0x000000000003ffff,
|
|
0x000000000007ffff,
|
|
0x00000000000fffff,
|
|
0x00000000001fffff,
|
|
0x00000000003fffff,
|
|
0x00000000007fffff,
|
|
0x0000000000ffffff,
|
|
0x0000000001ffffff,
|
|
0x0000000003ffffff,
|
|
0x0000000007ffffff,
|
|
0x000000000fffffff,
|
|
0x000000001fffffff,
|
|
0x000000003fffffff,
|
|
0x000000007fffffff,
|
|
0x00000000ffffffff,
|
|
0x00000001ffffffff,
|
|
0x00000003ffffffff,
|
|
0x00000007ffffffff,
|
|
0x0000000fffffffff,
|
|
0x0000001fffffffff,
|
|
0x0000003fffffffff,
|
|
0x0000007fffffffff,
|
|
0x000000ffffffffff,
|
|
0x000001ffffffffff,
|
|
0x000003ffffffffff,
|
|
0x000007ffffffffff,
|
|
0x00000fffffffffff,
|
|
0x00001fffffffffff,
|
|
0x00003fffffffffff,
|
|
0x00007fffffffffff,
|
|
0x0000ffffffffffff,
|
|
0x0001ffffffffffff,
|
|
0x0003ffffffffffff,
|
|
0x0007ffffffffffff,
|
|
0x000fffffffffffff,
|
|
0x001fffffffffffff,
|
|
0x003fffffffffffff,
|
|
0x007fffffffffffff,
|
|
0x00ffffffffffffff,
|
|
0x01ffffffffffffff,
|
|
0x03ffffffffffffff,
|
|
0x07ffffffffffffff,
|
|
0x0fffffffffffffff,
|
|
0x1fffffffffffffff,
|
|
0x3fffffffffffffff,
|
|
0x7fffffffffffffff
|
|
};
|
|
|
|
static void pcache_kv_free(HtUPKv *kv) {
|
|
r_return_if_fail (kv);
|
|
free (kv->value);
|
|
}
|
|
|
|
R_API bool r_io_desc_cache_init(RIODesc *desc) {
|
|
if (!desc || desc->cache) {
|
|
return false;
|
|
}
|
|
return (desc->cache = ht_up_new (NULL, pcache_kv_free, NULL)) ? true : false;
|
|
}
|
|
|
|
R_API int r_io_desc_cache_write(RIODesc *desc, ut64 paddr, const ut8 *buf, int len) {
|
|
RIODescCache *cache;
|
|
ut64 caddr, desc_sz = r_io_desc_size (desc);
|
|
int cbaddr, written = 0;
|
|
if ((len < 1) || !desc || (desc_sz <= paddr) ||
|
|
!desc->io || (!desc->cache && !r_io_desc_cache_init (desc))) {
|
|
return 0;
|
|
}
|
|
if (len > desc_sz) {
|
|
len = (int)desc_sz;
|
|
}
|
|
if (paddr > (desc_sz - len)) {
|
|
len = (int)(desc_sz - paddr);
|
|
}
|
|
caddr = paddr / R_IO_DESC_CACHE_SIZE;
|
|
cbaddr = paddr % R_IO_DESC_CACHE_SIZE;
|
|
while (written < len) {
|
|
//get an existing desc-cache, if it exists
|
|
if (!(cache = (RIODescCache *)ht_up_find (desc->cache, caddr, NULL))) {
|
|
//create new desc-cache
|
|
cache = R_NEW0 (RIODescCache);
|
|
if (!cache) {
|
|
return 0;
|
|
}
|
|
//feed ht with the new desc-cache
|
|
ht_up_insert (desc->cache, caddr, cache);
|
|
}
|
|
//check if the remaining data fits into the cache
|
|
if ((len - written) > (R_IO_DESC_CACHE_SIZE - cbaddr)) {
|
|
written += (R_IO_DESC_CACHE_SIZE - cbaddr);
|
|
//this can be optimized
|
|
for (; cbaddr < R_IO_DESC_CACHE_SIZE; cbaddr++) {
|
|
//write to cache
|
|
cache->cdata[cbaddr] = *buf;
|
|
//save, that its cached
|
|
cache->cached |= (0x1ULL << cbaddr);
|
|
buf++;
|
|
}
|
|
} else {
|
|
//XXX this looks like very suspicious
|
|
do {
|
|
cache->cdata[cbaddr] = *buf;
|
|
cache->cached |= (0x1ULL << cbaddr);
|
|
buf++;
|
|
written++;
|
|
cbaddr++;
|
|
} while (len > written);
|
|
}
|
|
caddr++;
|
|
cbaddr = 0;
|
|
}
|
|
REventIOWrite iow = { paddr, buf, len };
|
|
r_event_send (desc->io->event, R_EVENT_IO_WRITE, &iow);
|
|
return written;
|
|
}
|
|
|
|
R_API int r_io_desc_cache_read(RIODesc *desc, ut64 paddr, ut8 *buf, int len) {
|
|
RIODescCache *cache;
|
|
ut8 *ptr = buf;
|
|
ut64 caddr, desc_sz = r_io_desc_size (desc);
|
|
int cbaddr, amount = 0;
|
|
if ((len < 1) || !desc || (desc_sz <= paddr) || !desc->io || !desc->cache) {
|
|
return 0;
|
|
}
|
|
if (len > desc_sz) {
|
|
len = (int)desc_sz;
|
|
}
|
|
if (paddr > (desc_sz - len)) {
|
|
len = (int)(desc_sz - paddr);
|
|
}
|
|
caddr = paddr / R_IO_DESC_CACHE_SIZE;
|
|
cbaddr = paddr % R_IO_DESC_CACHE_SIZE;
|
|
while (amount < len) {
|
|
// get an existing desc-cache, if it exists
|
|
if (!(cache = (RIODescCache *)ht_up_find (desc->cache, caddr, NULL))) {
|
|
amount += (R_IO_DESC_CACHE_SIZE - cbaddr);
|
|
ptr += (R_IO_DESC_CACHE_SIZE - cbaddr);
|
|
goto beach;
|
|
}
|
|
if ((len - amount) > (R_IO_DESC_CACHE_SIZE - cbaddr)) {
|
|
amount += (R_IO_DESC_CACHE_SIZE - cbaddr);
|
|
for (; cbaddr < R_IO_DESC_CACHE_SIZE; cbaddr++) {
|
|
if (cache->cached & (0x1ULL << cbaddr)) {
|
|
*ptr = cache->cdata[cbaddr];
|
|
}
|
|
ptr++;
|
|
}
|
|
} else {
|
|
do {
|
|
if (cache->cached & (0x1ULL << cbaddr)) {
|
|
*ptr = cache->cdata[cbaddr];
|
|
}
|
|
ptr++;
|
|
amount++;
|
|
cbaddr++;
|
|
} while (len > amount);
|
|
}
|
|
beach:
|
|
caddr++;
|
|
cbaddr = 0;
|
|
}
|
|
return amount;
|
|
}
|
|
|
|
static void __riocache_free(void *user) {
|
|
RIOCache *cache = (RIOCache *) user;
|
|
free (cache);
|
|
}
|
|
|
|
static bool __desc_cache_list_cb(void *user, const ut64 k, const void *v) {
|
|
RList *writes = (RList *)user;
|
|
RIOCacheItem *cache = NULL;
|
|
ut64 blockaddr;
|
|
int byteaddr, i;
|
|
if (!writes) {
|
|
return false;
|
|
}
|
|
const RIODescCache *dcache = v;
|
|
blockaddr = k * R_IO_DESC_CACHE_SIZE;
|
|
for (i = byteaddr = 0; byteaddr < R_IO_DESC_CACHE_SIZE; byteaddr++) {
|
|
if (dcache->cached & (0x1LL << byteaddr)) {
|
|
if (!cache) {
|
|
cache = R_NEW0 (RIOCacheItem);
|
|
if (!cache) {
|
|
return false;
|
|
}
|
|
cache->data = malloc (R_IO_DESC_CACHE_SIZE - byteaddr);
|
|
if (!cache->data) {
|
|
free (cache);
|
|
return false;
|
|
}
|
|
cache->itv.addr = blockaddr + byteaddr;
|
|
}
|
|
cache->data[i] = dcache->cdata[byteaddr];
|
|
i++;
|
|
} else if (cache) {
|
|
ut8 *data = realloc (cache->data, i);
|
|
if (!data) {
|
|
__riocache_free ((void *) cache);
|
|
return false;
|
|
}
|
|
cache->data = data;
|
|
cache->itv.size = i;
|
|
i = 0;
|
|
r_list_push (writes, cache);
|
|
cache = NULL;
|
|
}
|
|
}
|
|
if (cache) {
|
|
#if 0
|
|
cache->size = i;
|
|
cache->to = blockaddr + R_IO_DESC_CACHE_SIZE;
|
|
#endif
|
|
cache->itv.size = i;
|
|
r_list_push (writes, cache);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
R_API RList *r_io_desc_cache_list(RIODesc *desc) {
|
|
if (!desc || !desc->io || !desc->io->desc || !desc->io->p_cache || !desc->cache) {
|
|
return NULL;
|
|
}
|
|
RList *writes = r_list_newf ((RListFree)__riocache_free);
|
|
if (!writes) {
|
|
return NULL;
|
|
}
|
|
ht_up_foreach (desc->cache, __desc_cache_list_cb, writes);
|
|
RIODesc *current = desc->io->desc;
|
|
desc->io->desc = desc;
|
|
desc->io->p_cache = false;
|
|
|
|
RIOCacheItem *c;
|
|
RListIter *iter;
|
|
r_list_foreach (writes, iter, c) {
|
|
const ut64 itvSize = r_itv_size (c->itv);
|
|
c->odata = calloc (1, itvSize);
|
|
if (!c->odata) {
|
|
r_list_free (writes);
|
|
return NULL;
|
|
}
|
|
r_io_pread_at (desc->io, r_itv_begin (c->itv), c->odata, itvSize);
|
|
}
|
|
desc->io->p_cache = true;
|
|
desc->io->desc = current;
|
|
return writes;
|
|
}
|
|
|
|
static bool __desc_cache_commit_cb(void *user, const ut64 k, const void *v) {
|
|
RIODesc *desc = (RIODesc *)user;
|
|
int byteaddr, i;
|
|
ut8 buf[R_IO_DESC_CACHE_SIZE] = {0};
|
|
if (!desc || !desc->io) {
|
|
return false;
|
|
}
|
|
const RIODescCache *dcache = v;
|
|
ut64 blockaddr = R_IO_DESC_CACHE_SIZE * k;
|
|
for (i = byteaddr = 0; byteaddr < R_IO_DESC_CACHE_SIZE; byteaddr++) {
|
|
if (dcache->cached & (1LL << byteaddr)) {
|
|
buf[i] = dcache->cdata[byteaddr];
|
|
i++;
|
|
} else if (i > 0) {
|
|
r_io_pwrite_at (desc->io, blockaddr + byteaddr - i, buf, i);
|
|
i = 0;
|
|
}
|
|
}
|
|
if (i > 0) {
|
|
r_io_pwrite_at (desc->io, blockaddr + R_IO_DESC_CACHE_SIZE - i, buf, i);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
R_API bool r_io_desc_cache_commit(RIODesc *desc) {
|
|
RIODesc *current;
|
|
if (!desc || !(desc->perm & R_PERM_W) || !desc->io || !desc->io->files || !desc->io->p_cache) {
|
|
return false;
|
|
}
|
|
if (!desc->cache) {
|
|
return true;
|
|
}
|
|
current = desc->io->desc;
|
|
desc->io->desc = desc;
|
|
desc->io->p_cache = false;
|
|
ht_up_foreach (desc->cache, __desc_cache_commit_cb, desc);
|
|
ht_up_free (desc->cache);
|
|
desc->cache = NULL;
|
|
desc->io->p_cache = true;
|
|
desc->io->desc = current;
|
|
return true;
|
|
}
|
|
|
|
static bool __desc_cache_cleanup_cb(void *user, const ut64 k, const void *v) {
|
|
RIODesc *desc = (RIODesc *)user;
|
|
ut64 size, blockaddr;
|
|
int byteaddr;
|
|
if (!desc || !desc->cache) {
|
|
return false;
|
|
}
|
|
RIODescCache *cache = (RIODescCache *)v;
|
|
blockaddr = R_IO_DESC_CACHE_SIZE * k;
|
|
size = r_io_desc_size (desc);
|
|
if (size <= blockaddr) {
|
|
ht_up_delete (desc->cache, k);
|
|
return true;
|
|
}
|
|
if (size <= (blockaddr + R_IO_DESC_CACHE_SIZE - 1)) {
|
|
//this looks scary, but it isn't
|
|
byteaddr = (int)(size - blockaddr) - 1;
|
|
cache->cached &= cleanup_masks[byteaddr];
|
|
}
|
|
return true;
|
|
}
|
|
|
|
R_API void r_io_desc_cache_cleanup(RIODesc *desc) {
|
|
if (desc && desc->cache) {
|
|
ht_up_foreach (desc->cache, __desc_cache_cleanup_cb, desc);
|
|
}
|
|
}
|
|
|
|
static bool __desc_fini_cb(void *user, void *data, ut32 id) {
|
|
RIODesc *desc = (RIODesc *)data;
|
|
if (desc->cache) {
|
|
ht_up_free (desc->cache);
|
|
desc->cache = NULL;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
R_API void r_io_desc_cache_fini(RIODesc *desc) {
|
|
__desc_fini_cb (NULL, (void *) desc, 0);
|
|
}
|
|
|
|
R_API void r_io_desc_cache_fini_all(RIO *io) {
|
|
if (io && io->files) {
|
|
r_id_storage_foreach (io->files, __desc_fini_cb, NULL);
|
|
}
|
|
}
|