static int check_pagemap(void)
{
int ret, fd;
u64 pfn = 0;
fd = __open_proc(PROC_SELF, EPERM, O_RDONLY, "pagemap");
if (fd < 0) {
if (errno == EPERM) {
pr_info("Pagemap disabled");
kdat.pmap = PM_DISABLED;
return 0;
}
return -1;
}
/* Get the PFN of some present page. Stack is here, so try it :) */
ret = pread(fd, &pfn, sizeof(pfn), (((unsigned long)&ret) / page_size()) * sizeof(pfn));
if (ret != sizeof(pfn)) {
pr_perror("Can't read pagemap");
return -1;
}
close(fd);
if ((pfn & PME_PFRAME_MASK) == 0) {
pr_info("Pagemap provides flags only\n");
kdat.pmap = PM_FLAGS_ONLY;
} else {
pr_info("Pagemap is fully functional\n");
kdat.pmap = PM_FULL;
}
return 0;
}
static RIODesc *__open(RIO *io, const char *file, int rw, int mode) {
if (__plugin_open (io, file, 0)) {
char *pidpath;
RIODesc *ret;
RIOW32Dbg *dbg = R_NEW0 (RIOW32Dbg);
if (!dbg) {
return NULL;
}
dbg->pid = atoi (file + 9);
if (__open_proc (dbg, !strncmp (file, "attach://", 9)) == -1) {
free (dbg);
return NULL;
}
pidpath = r_sys_pid_to_path (dbg->pid);
ret = r_io_desc_new (io, &r_io_plugin_w32dbg,
file, rw | R_PERM_X, mode, dbg);
ret->name = pidpath;
return ret;
}
return NULL;
}
