/*
* Save 4096 bytes from %esp
* TODO: Add support for reverse stack architectures
* Also known as r_debug_inject()
*/
R_API ut64 r_debug_execute(RDebug *dbg, const ut8 *buf, int len, int restore) {
int orig_sz;
ut8 stackbackup[4096];
ut8 *backup, *orig = NULL;
RRegItem *ri, *risp, *ripc;
ut64 rsp, rpc, ra0 = 0LL;
if (r_debug_is_dead (dbg))
return R_FALSE;
ripc = r_reg_get (dbg->reg, dbg->reg->name[R_REG_NAME_PC], R_REG_TYPE_GPR);
risp = r_reg_get (dbg->reg, dbg->reg->name[R_REG_NAME_SP], R_REG_TYPE_GPR);
if (ripc) {
r_debug_reg_sync (dbg, R_REG_TYPE_GPR, R_FALSE);
orig = r_reg_get_bytes (dbg->reg, -1, &orig_sz);
if (orig == NULL) {
eprintf ("Cannot get register arena bytes\n");
return 0LL;
}
rpc = r_reg_get_value (dbg->reg, ripc);
rsp = r_reg_get_value (dbg->reg, risp);
backup = malloc (len);
if (backup == NULL) {
free (orig);
return 0LL;
}
dbg->iob.read_at (dbg->iob.io, rpc, backup, len);
dbg->iob.read_at (dbg->iob.io, rsp, stackbackup, len);
r_bp_add_sw (dbg->bp, rpc+len, dbg->bpsize, R_BP_PROT_EXEC);
/* execute code here */
dbg->iob.write_at (dbg->iob.io, rpc, buf, len);
//r_bp_add_sw (dbg->bp, rpc+len, 4, R_BP_PROT_EXEC);
r_debug_continue (dbg);
//r_bp_del (dbg->bp, rpc+len);
/* TODO: check if stopped in breakpoint or not */
r_bp_del (dbg->bp, rpc+len);
dbg->iob.write_at (dbg->iob.io, rpc, backup, len);
if (restore) {
dbg->iob.write_at (dbg->iob.io, rsp, stackbackup, len);
}
r_debug_reg_sync (dbg, R_REG_TYPE_GPR, R_FALSE);
ri = r_reg_get (dbg->reg, dbg->reg->name[R_REG_NAME_A0], R_REG_TYPE_GPR);
ra0 = r_reg_get_value (dbg->reg, ri);
if (restore) {
r_reg_set_bytes (dbg->reg, -1, orig, orig_sz);
} else {
r_reg_set_value (dbg->reg, ripc, rpc);
}
r_debug_reg_sync (dbg, R_REG_TYPE_GPR, R_TRUE);
free (backup);
free (orig);
eprintf ("ra0=0x%08"PFMT64x"\n", ra0);
} else eprintf ("r_debug_execute: Cannot get program counter\n");
return (ra0);
}
static int r_debug_wind_reg_read (RDebug *dbg, int type, ut8 *buf, int size) {
(void)type;
int ret = wind_read_reg(wctx, buf, size);
if (!ret || size != ret)
return -1;
r_reg_set_bytes (dbg->reg, R_REG_TYPE_ALL, buf, ret);
// Report as if no register has been written as we've already updated the arena here
return 0;
}
R_API int r_debug_reg_sync(RDebug *dbg, int type, int write) {
int i, size;
if (!dbg || !dbg->reg || !dbg->h)
return R_FALSE;
// Theres no point in syncing a dead target
if (r_debug_is_dead (dbg))
return R_FALSE;
// Check if the functions needed are available
if (write && !dbg->h->reg_write)
return R_FALSE;
if (!write && !dbg->h->reg_read)
return R_FALSE;
// Sync all the types sequentially if asked
i = (type == R_REG_TYPE_ALL) ? R_REG_TYPE_GPR : type;
do {
if (write) {
ut8 *buf = r_reg_get_bytes (dbg->reg, i, &size);
if (!buf || !dbg->h->reg_write (dbg, i, buf, size)) {
if (i==0)
eprintf ("r_debug_reg: error writing registers %d to %d\n", i, dbg->pid);
return R_FALSE;
}
} else {
//int bufsize = R_MAX (1024, dbg->reg->size*2); // i know. its hacky
int bufsize = dbg->reg->size;
ut8 *buf = malloc (bufsize);
if (!buf) return R_FALSE;
//we have already checked dbg->h and dbg->h->reg_read above
size = dbg->h->reg_read (dbg, i, buf, bufsize);
// we need to check against zero because reg_read can return R_FALSE
if (!size) {
eprintf ("r_debug_reg: error reading registers\n");
free (buf);
return R_FALSE;
} else
r_reg_set_bytes (dbg->reg, i, buf, R_MIN(size, bufsize));
free (buf);
}
// DO NOT BREAK R_REG_TYPE_ALL PLEASE
// break;
// Continue the syncronization or just stop if it was asked only for a single type of regs
} while ((type==R_REG_TYPE_ALL) && (i++ < R_REG_TYPE_LAST));
return R_TRUE;
}
R_API int r_debug_reg_sync(RDebug *dbg, int type, int write) {
int i, size;
if (!dbg || !dbg->reg || !dbg->h)
return R_FALSE;
// Theres no point in syncing a dead target
if (r_debug_is_dead(dbg))
return R_FALSE;
// Check if the functions needed are available
if (write && !dbg->h->reg_write)
return R_FALSE;
if (!write && !dbg->h->reg_read)
return R_FALSE;
// Sync all the types sequentially if asked
i = (type == R_REG_TYPE_ALL) ? R_REG_TYPE_GPR : type;
do {
if (write) {
ut8 *buf = r_reg_get_bytes (dbg->reg, i, &size);
if (!buf || !dbg->h->reg_write (dbg, i, buf, size)) {
eprintf ("r_debug_reg: error writing registers\n");
return R_FALSE;
}
} else {
// TODO : Get an exact size of the profile
ut8 buf[2048];
size = dbg->h->reg_read (dbg, i, buf, sizeof (buf));
if (!size) {
eprintf ("r_debug_reg: error reading registers\n");
return R_FALSE;
}
r_reg_set_bytes (dbg->reg, i, buf, size);
}
// Continue the syncronization or just stop if it was asked only for a single type of regs
} while(i++ < R_REG_TYPE_LAST && type != R_REG_TYPE_ALL);
return R_TRUE;
}
R_API int r_debug_reg_sync(RDebug *dbg, int type, int write) {
ut8 buf[4096]; // XXX hacky!
int next, size, ret = R_FALSE;
if (!dbg || !dbg->reg || dbg->pid == -1)
return R_FALSE;
if (type == -1) {
type = R_REG_TYPE_GPR;
next = R_REG_TYPE_DRX;
} else next = 0;
repeat:
if (write) {
if (dbg && dbg->h && dbg->h->reg_write) {
ut8 *buf = r_reg_get_bytes (dbg->reg, type, &size);
if (!dbg->h->reg_write (dbg, type, buf, sizeof (buf)))
eprintf ("r_debug_reg: error writing registers\n");
else ret = R_TRUE;
} //else eprintf ("r_debug_reg: cannot set registers\n");
} else {
/* read registers from debugger backend to dbg->regs */
if (dbg && dbg->h && dbg->h->reg_read) {
size = dbg->h->reg_read (dbg, type, buf, sizeof (buf));
if (size == 0) {
eprintf ("r_debug_reg: error reading registers pid=%d\n", dbg->pid);
} else {
ret = r_reg_set_bytes (dbg->reg, type, buf, size);
}
} //else eprintf ("r_debug_reg: cannot read registers\n");
}
if (next) {
type = next;
switch (next) {
case R_REG_TYPE_FPU: next = R_REG_TYPE_DRX; break;
case R_REG_TYPE_DRX: next = 0; break;
default: next = 0; break;
}
goto repeat;
}
return ret;
}
R_API int r_debug_reg_sync(RDebug *dbg, int type, int write) {
int i, n, size;
if (!dbg || !dbg->reg || !dbg->h) {
return false;
}
// Theres no point in syncing a dead target
if (r_debug_is_dead (dbg)) {
return false;
}
// Check if the functions needed are available
if (write && !dbg->h->reg_write) {
return false;
}
if (!write && !dbg->h->reg_read) {
return false;
}
// Sync all the types sequentially if asked
i = (type == R_REG_TYPE_ALL)? R_REG_TYPE_GPR: type;
// Check to get the correct arena when using @ into reg profile (arena!=type)
// if request type is positive and the request regset dont have regs
if (i >= R_REG_TYPE_GPR && dbg->reg->regset[i].regs && !dbg->reg->regset[i].regs->length) {
// seek into the other arena for redirections.
for (n = R_REG_TYPE_GPR; n < R_REG_TYPE_LAST; n++) {
// get regset mask
int mask = dbg->reg->regset[n].maskregstype;
// convert request arena to mask value
int v = ((int)1 << i);
// skip checks on same request arena and check if this arena have inside the request arena type
if (n != i && (mask & v)) {
//eprintf(" req = %i arena = %i mask = %x search = %x \n", i, n, mask, v);
//eprintf(" request arena %i found at arena %i\n", i, n );
// if this arena have the request arena type, force to use this arena.
i = n;
break;
}
}
}
do {
if (write) {
ut8 *buf = r_reg_get_bytes (dbg->reg, i, &size);
if (!buf || !dbg->h->reg_write (dbg, i, buf, size)) {
if (!i) {
eprintf ("r_debug_reg: error writing "
"registers %d to %d\n", i, dbg->tid);
}
free (buf);
return false;
}
free (buf);
} else {
// int bufsize = R_MAX (1024, dbg->reg->size*2); // i know. its hacky
int bufsize = dbg->reg->size;
//int bufsize = dbg->reg->regset[i].arena->size;
if (bufsize > 0) {
ut8 *buf = calloc (1 + 1, bufsize);
if (!buf) {
return false;
}
//we have already checked dbg->h and dbg->h->reg_read above
size = dbg->h->reg_read (dbg, i, buf, bufsize);
// we need to check against zero because reg_read can return false
if (size > 0) {
r_reg_set_bytes (dbg->reg, i, buf, size); //R_MIN (size, bufsize));
// free (buf);
// return true;
}
free (buf);
}
}
// DO NOT BREAK R_REG_TYPE_ALL PLEASE
// break;
// Continue the syncronization or just stop if it was asked only for a single type of regs
i++;
} while ((type == R_REG_TYPE_ALL) && (i < R_REG_TYPE_LAST));
return true;
}