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108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
/* radare - LGPL - Copyright 2008-2011 pancake<nopcode.org> */
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// XXX This has been stolen from r_vm !!! we must adapt this
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// XXX to work with r_io correctly
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// r_io_cache_t has not been defined
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// TODO: implement a more inteligent way to store cached memory
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// TODO: define limit of max mem to cache
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#include "r_io.h"
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R_API void r_io_cache_init(RIO *io) {
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io->cached = R_FALSE; // cache write ops
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io->cached_read = R_FALSE; // cached read ops
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INIT_LIST_HEAD (&io->cache);
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}
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R_API void r_io_cache_enable(RIO *io, int read, int write) {
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io->cached = read | write;
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io->cached_read = read;
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}
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R_API void r_io_cache_commit(RIO *io) {
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struct list_head *pos, *n;
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if (io->cached) {
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io->cached = R_FALSE;
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list_for_each_safe (pos, n, &io->cache) {
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RIOCache *c = list_entry (pos, RIOCache, list);
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if (!r_io_write_at (io, c->from, c->data, c->size))
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eprintf ("Error writing change at 0x%08"PFMT64x"\n", c->from);
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}
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io->cached = R_TRUE;
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r_io_cache_reset (io, io->cached);
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}
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}
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R_API void r_io_cache_reset(RIO *io, int set) {
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struct list_head *pos, *n;
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io->cached = set;
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list_for_each_safe(pos, n, &io->cache) {
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RIOCache *c = list_entry (pos, RIOCache, list);
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free (c->data);
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free (c);
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}
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// is this necessary at all?
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INIT_LIST_HEAD (&io->cache);
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}
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R_API int r_io_cache_invalidate(RIO *io, ut64 from, ut64 to) {
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int ret = R_FALSE;
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/* TODO: Implement: invalidate ranged cached read ops between from/to */
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return ret;
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}
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R_API int r_io_cache_list(RIO *io, int rad) {
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int i;
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struct list_head *pos, *n;
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list_for_each_safe (pos, n, &io->cache) {
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RIOCache *c = list_entry (pos, RIOCache, list);
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if (rad) {
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io->printf ("wx ");
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for (i=0; i<c->size; i++)
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io->printf ("%02x", c->data[i]);
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io->printf (" @ 0x%08"PFMT64x"\n", c->from);
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} else io->printf ("addr=0x%08"PFMT64x" size=%d\n", c->from, c->size);
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}
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return R_FALSE;
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}
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R_API int r_io_cache_write(RIO *io, ut64 addr, const ut8 *buf, int len) {
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RIOCache *ch = R_NEW (RIOCache);
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ch->from = addr;
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ch->to = addr + len;
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ch->size = len;
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ch->data = (ut8*)malloc (len);
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memcpy (ch->data, buf, len);
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list_add_tail (&(ch->list), &io->cache);
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return len;
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}
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R_API int r_io_cache_read(RIO *io, ut64 addr, ut8 *buf, int len) {
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int l, ret, da, db;
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struct list_head *pos;
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list_for_each (pos, &io->cache) {
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RIOCache *c = list_entry (pos, RIOCache, list);
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if (r_range_overlap (addr, addr+len, c->from, c->to, &ret)) {
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if (ret>0) {
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da = ret;
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db = 0;
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l = c->size;
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} else
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if (ret<0) {
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da = 0;
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db = -ret;
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l = c->size-db;
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} else {
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da = 0;
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db = 0;
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l = c->size;
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}
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if (l>len)
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l = len;
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memcpy (buf+da, c->data+db, l);
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}
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}
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return len;
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}
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