static int __read(RIO *io, RIODesc *fd, ut8 *buf, int len) {
vm_size_t size = 0;
int err = vm_read_overwrite (RIOMACH_TASK (fd->data),
(vm_offset_t)io->off, len, (pointer_t)buf, &size);
if (err == -1) {
eprintf ("Cannot read\n");
return -1;
}
return (int)size;
}
static int __read(RIO *io, RIODesc *fd, ut8 *buf, int len) {
vm_size_t size = 0;
int blen, err, copied = 0;
int blocksize = 32;
RIOMach *riom = (RIOMach *)fd->data;
if (task_is_dead (riom->pid)) {
return -1;
}
memset (buf, 0xff, len);
if (RIOMACH_PID (fd->data) == 0) {
if (io->off < 4096) {
return len;
}
}
copied = getNextValid (io, fd, io->off) - io->off;
if (copied < 0) copied = 0;
while (copied < len) {
blen = R_MIN ((len - copied), blocksize);
//blen = len;
err = vm_read_overwrite (RIOMACH_TASK (fd->data),
(ut64)io->off + copied, blen,
(pointer_t)buf + copied, &size);
switch (err) {
case KERN_PROTECTION_FAILURE:
//eprintf ("r_io_mach_read: kern protection failure.\n");
break;
case KERN_INVALID_ADDRESS:
if (blocksize == 1) {
memset (buf+copied, 0xff, len-copied);
return size+copied;
}
blocksize = 1;
blen = 1;
buf[copied] = 0xff;
break;
}
if (err == -1 || size < 1) {
return -1;
}
if (size == 0) {
if (blocksize == 1) {
memset (buf+copied, 0xff, len-copied);
return len;
}
blocksize = 1;
blen = 1;
buf[copied] = 0xff;
}
copied += blen;
}
return len;
}
static int __read(RIO *io, RIODesc *fd, ut8 *buf, int len) {
vm_size_t size = 0;
int blen, err, copied = 0;
int blocksize = 32;
if (RIOMACH_PID (fd->data) == 0) {
if (io->off<4096)
return len;
}
memset (buf, 0xff, len);
while (copied<len) {
blen = R_MIN ((len-copied), blocksize);
//blen = len;
err = vm_read_overwrite (RIOMACH_TASK (fd->data),
(ut64)io->off+copied, blen, (pointer_t)buf+copied, &size);
switch (err) {
case KERN_PROTECTION_FAILURE:
//eprintf ("r_io_mach_read: kern protection failure.\n");
break;
case KERN_INVALID_ADDRESS:
if (blocksize == 1) {
memset (buf+copied, 0xff, len-copied);
return size+copied;
}
blocksize = 1;
blen = 1;
buf[copied] = 0xff;
//eprintf("invaddr %d\n",len);
break;
}
if (err == -1) {
//eprintf ("Cannot read\n");
return -1;
}
if (size==0) {
if (blocksize == 1) {
memset (buf+copied, 0xff, len-copied);
return len; //size+copied;
}
blocksize = 1;
blen = 1;
buf[copied] = 0xff;
}
//if (size != blen) { return size+copied; }
copied += blen;
}
return len; //(int)size;
}
