pkey_util.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2#define __SANE_USERSPACE_TYPES__
 3#include <sys/syscall.h>
 4#include <unistd.h>
 5
 6#include "pkey-helpers.h"
 7
 8int sys_pkey_alloc(unsigned long flags, unsigned long init_val)
 9{
10	int ret = syscall(SYS_pkey_alloc, flags, init_val);
11	dprintf1("%s(flags=%lx, init_val=%lx) syscall ret: %d errno: %d\n",
12			__func__, flags, init_val, ret, errno);
13	return ret;
14}
15
16int sys_pkey_free(unsigned long pkey)
17{
18	int ret = syscall(SYS_pkey_free, pkey);
19	dprintf1("%s(pkey=%ld) syscall ret: %d\n", __func__, pkey, ret);
20	return ret;
21}
22
23int sys_mprotect_pkey(void *ptr, size_t size, unsigned long orig_prot,
24		unsigned long pkey)
25{
26	int sret;
27
28	dprintf2("%s(0x%p, %zx, prot=%lx, pkey=%lx)\n", __func__,
29			ptr, size, orig_prot, pkey);
30
31	errno = 0;
32	sret = syscall(__NR_pkey_mprotect, ptr, size, orig_prot, pkey);
33	if (errno) {
34		dprintf2("SYS_mprotect_key sret: %d\n", sret);
35		dprintf2("SYS_mprotect_key prot: 0x%lx\n", orig_prot);
36		dprintf2("SYS_mprotect_key failed, errno: %d\n", errno);
37		if (DEBUG_LEVEL >= 2)
38			perror("SYS_mprotect_pkey");
39	}
40	return sret;
41}