static char *__system(RIO *io, RIODesc *fd, const char *cmd) {
if (!io || !fd || !cmd || !fd->data) {
return NULL;
}
RIODescData *iodd = fd->data;
if (iodd->magic != R_MACH_MAGIC) {
return NULL;
}
task_t task = pid_to_task (fd, iodd->tid);
/* XXX ugly hack for testing purposes */
if (!strncmp (cmd, "perm", 4)) {
int perm = r_str_rwx (cmd + 4);
if (perm) {
int pagesize = tsk_pagesize (fd);
tsk_setperm (io, task, io->off, pagesize, perm);
} else {
eprintf ("Usage: =!perm [rwx]\n");
}
return NULL;
}
if (!strncmp (cmd, "pid", 3)) {
RIODescData *iodd = fd->data;
RIOMach *riom = iodd->data;
const char *pidstr = cmd + 3;
int pid = -1;
if (*pidstr) {
pid = __get_pid (fd);
//return NULL;
} else {
eprintf ("%d\n", iodd->pid);
return NULL;
}
if (!strcmp (pidstr, "0")) {
pid = 0;
} else {
pid = atoi (pidstr);
if (!pid) {
pid = -1;
}
}
if (pid != -1) {
task_t task = pid_to_task (fd, pid);
if (task != -1) {
riom->task = task;
iodd->pid = pid;
iodd->tid = pid;
return NULL;
}
}
eprintf ("io_mach_system: Invalid pid %d\n", pid);
} else {
eprintf ("Try: '=!pid' or '=!perm'\n");
}
return NULL;
}
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 __system(RIO *io, RIODesc *fd, const char *cmd) {
RIOMach *riom;
if (!io || !fd || cmd || !fd->data) {
return 0;
}
riom = (RIOMach*)fd->data;
/* XXX ugly hack for testing purposes */
if (!strncmp (cmd, "perm", 4)) {
int perm = r_str_rwx (cmd + 4);
if (perm) {
int pagesize = tsk_pagesize(riom);
tsk_setperm (io, riom->task, io->off, pagesize, perm);
} else {
eprintf ("Usage: =!perm [rwx]\n");
}
return 0;
}
if (!strncmp (cmd, "pid", 3)) {
const char *pidstr = cmd + 3;
int pid = -1;
if (*pidstr) {
int pid = RIOMACH_PID (fd->data);
eprintf ("%d\n", pid);
return 0;
}
if (!strcmp (pidstr, "0")) {
pid = 0;
} else {
pid = atoi (pidstr);
if (!pid) pid = -1;
}
if (pid != -1) {
task_t task = pid_to_task (pid);
if (task != -1) {
eprintf ("PID=%d\n", pid);
riom->pid = pid;
riom->task = task;
return 0;
}
}
eprintf ("io_mach_system: Invalid pid %d\n", pid);
} else {
eprintf ("Try: '=!pid' or '=!perm'\n");
}
return 1;
}
