long int
ptrace (enum __ptrace_request request, ...)
{
long int res, ret;
va_list ap;
pid_t pid;
void *addr, *data;
va_start (ap, request);
pid = va_arg (ap, pid_t);
addr = va_arg (ap, void *);
data = va_arg (ap, void *);
va_end (ap);
if (request > 0 && request < 4)
data = &ret;
res = __ptrace(request, pid, addr, data);
if (res >= 0 && request > 0 && request < 4) {
__set_errno(0);
return ret;
}
return res;
}
static int ptrace_write32(void *opaque, long addr, long val) {
struct priv_data_ptrace *p = (struct priv_data_ptrace *) opaque;
int rc;
// the desired value
rc = __ptrace(PTRACE_POKETEXT, p->pid, &p->val, (void *) val);
if (rc < 0) {
LOGE("__ptrace()");
return rc;
}
// the desired value will be written
rc = __ptrace(PTRACE_PEEKTEXT, p->pid, &p->val, (void *) addr);
if (rc < 0) {
LOGE("__ptrace()");
return rc;
}
return 0;
}
long ptrace(int request, pid_t pid, void* addr, void* data) {
switch (request) {
case PTRACE_PEEKUSR:
case PTRACE_PEEKTEXT:
case PTRACE_PEEKDATA:
{
long word;
long ret = __ptrace(request, pid, addr, &word);
if (ret == 0) {
return word;
} else {
// __ptrace already set errno for us.
return -1;
}
}
default:
return __ptrace(request, pid, addr, data);
}
}
