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 mach_write_at(RIO *io, RIODesc *desc, const void *buf, int len, ut64 addr) {
vm_address_t vaddr = addr;
vm_address_t pageaddr;
vm_size_t pagesize;
vm_size_t total_size;
int operms = 0;
int pid = __get_pid (desc);
if (!desc || pid < 0) {
return 0;
}
task_t task = pid_to_task (desc, pid);
if (len < 1 || task_is_dead (desc, task)) {
return 0;
}
pageaddr = tsk_getpagebase (desc, addr);
pagesize = tsk_pagesize (desc);
total_size = (len > pagesize)
? pagesize * (1 + (len / pagesize))
: pagesize;
if (tsk_write (task, vaddr, buf, len)) {
return len;
}
operms = tsk_getperm (io, task, pageaddr);
if (!tsk_setperm (io, task, pageaddr, total_size, VM_PROT_READ | VM_PROT_WRITE | VM_PROT_COPY)) {
eprintf ("io.mach: Cannot set page perms for %d byte(s) at 0x%08"
PFMT64x"\n", (int)pagesize, (ut64)pageaddr);
return -1;
}
if (!tsk_write (task, vaddr, buf, len)) {
eprintf ("io.mach: Cannot write on memory\n");
len = -1;
}
if (operms) {
if (!tsk_setperm (io, task, pageaddr, total_size, operms)) {
eprintf ("io.mach: Cannot restore page perms\n");
return -1;
}
}
return len;
}
static int mach_write_at(RIO *io, RIOMach *riom, const void *buf, int len, ut64 addr) {
vm_address_t vaddr = addr;
vm_address_t pageaddr;
vm_size_t pagesize;
vm_size_t total_size;
int operms = 0;
task_t task;
if (!riom || len < 1)
return 0;
if (task_is_dead (riom->pid))
return 0;
task = riom->task;
pageaddr = tsk_getpagebase (riom, addr);
pagesize = tsk_pagesize (riom);
if (len > pagesize)
total_size = pagesize * (1 + (len / pagesize));
else
total_size = pagesize;
if (tsk_write (task, vaddr, buf, len))
return len;
operms = tsk_getperm (io, task, pageaddr);
if (!tsk_setperm (io, task, pageaddr, total_size, VM_PROT_READ | VM_PROT_WRITE | VM_PROT_COPY)) {
eprintf ("io.mach: Cannot set page perms for %d bytes at 0x%08"
PFMT64x"\n", (int)pagesize, (ut64)pageaddr);
return -1;
}
if (!tsk_write (task, vaddr, buf, len)) {
eprintf ("io.mach: Cannot write on memory\n");
len = -1;
}
if (operms) {
if (!tsk_setperm (io, task, pageaddr, total_size, operms)) {
eprintf ("io.mach: Cannot restore page perms\n");
return -1;
}
}
return len;
}
static int __read(RIO *io, RIODesc *desc, ut8 *buf, int len) {
vm_size_t size = 0;
int blen, err, copied = 0;
int blocksize = 32;
RIODescData *dd = (RIODescData *)desc->data;
if (!io || !desc || !buf || !dd) {
return -1;
}
if (dd ->magic != r_str_hash ("mach")) {
return -1;
}
memset (buf, 0xff, len);
int pid = __get_pid (desc);
task_t task = pid_to_task (desc, pid);
if (task_is_dead (desc, pid)) {
return -1;
}
if (pid == 0) {
if (io->off < 4096) {
return len;
}
}
copied = getNextValid (io, desc, io->off) - io->off;
if (copied < 0) {
copied = 0;
}
while (copied < len) {
blen = R_MIN ((len - copied), blocksize);
//blen = len;
err = vm_read_overwrite (task,
(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;
}
