1*d4514f0bSApple OSS Distributions #include <darwintest.h>
2*d4514f0bSApple OSS Distributions
3*d4514f0bSApple OSS Distributions #include <mach/mach_error.h>
4*d4514f0bSApple OSS Distributions #include <mach/mach_host.h>
5*d4514f0bSApple OSS Distributions
6*d4514f0bSApple OSS Distributions #include "drop_priv.h"
7*d4514f0bSApple OSS Distributions
8*d4514f0bSApple OSS Distributions T_GLOBAL_META(T_META_NAMESPACE("xnu.debugging"));
9*d4514f0bSApple OSS Distributions
10*d4514f0bSApple OSS Distributions /*
11*d4514f0bSApple OSS Distributions * The low 8 bits may be in use, so modify one
12*d4514f0bSApple OSS Distributions * of the upper 8 bits to ensure round-tripping.
13*d4514f0bSApple OSS Distributions */
14*d4514f0bSApple OSS Distributions #define LIBTRACE_PRIVATE_DATA 0x01000000
15*d4514f0bSApple OSS Distributions
16*d4514f0bSApple OSS Distributions static bool _needs_reset;
17*d4514f0bSApple OSS Distributions static uint32_t _original;
18*d4514f0bSApple OSS Distributions
19*d4514f0bSApple OSS Distributions static uint32_t
_save_atm_diagnostic_flag(void)20*d4514f0bSApple OSS Distributions _save_atm_diagnostic_flag(void)
21*d4514f0bSApple OSS Distributions {
22*d4514f0bSApple OSS Distributions kern_return_t kr;
23*d4514f0bSApple OSS Distributions kr = host_get_atm_diagnostic_flag(mach_host_self(), &_original);
24*d4514f0bSApple OSS Distributions T_QUIET; T_ASSERT_MACH_SUCCESS(kr, "host_get_atm_diagnostic_flag()");
25*d4514f0bSApple OSS Distributions T_LOG("Original ATM diagnostic flag: 0x%08x", _original);
26*d4514f0bSApple OSS Distributions return _original;
27*d4514f0bSApple OSS Distributions }
28*d4514f0bSApple OSS Distributions
29*d4514f0bSApple OSS Distributions static kern_return_t
_mutate_atm_diagnostic_flag(uint32_t v)30*d4514f0bSApple OSS Distributions _mutate_atm_diagnostic_flag(uint32_t v)
31*d4514f0bSApple OSS Distributions {
32*d4514f0bSApple OSS Distributions T_LOG("Try to set ATM diagnostic flag to: 0x%08x", v);
33*d4514f0bSApple OSS Distributions kern_return_t kr = host_set_atm_diagnostic_flag(mach_host_self(), v);
34*d4514f0bSApple OSS Distributions if (kr == KERN_SUCCESS) {
35*d4514f0bSApple OSS Distributions _needs_reset = true;
36*d4514f0bSApple OSS Distributions }
37*d4514f0bSApple OSS Distributions return kr;
38*d4514f0bSApple OSS Distributions }
39*d4514f0bSApple OSS Distributions
40*d4514f0bSApple OSS Distributions static void
_reset_atm_diagnostic_flag(void)41*d4514f0bSApple OSS Distributions _reset_atm_diagnostic_flag(void)
42*d4514f0bSApple OSS Distributions {
43*d4514f0bSApple OSS Distributions if (!_needs_reset) {
44*d4514f0bSApple OSS Distributions return;
45*d4514f0bSApple OSS Distributions }
46*d4514f0bSApple OSS Distributions T_LOG("Reset ATM diagnostic flag to: 0x%08x", _original);
47*d4514f0bSApple OSS Distributions kern_return_t kr;
48*d4514f0bSApple OSS Distributions kr = host_set_atm_diagnostic_flag(mach_host_self(), _original);
49*d4514f0bSApple OSS Distributions if (kr != KERN_SUCCESS) {
50*d4514f0bSApple OSS Distributions T_ASSERT_FAIL("host_set_atm_diagnostic_flag() failed: %s",
51*d4514f0bSApple OSS Distributions mach_error_string(kr));
52*d4514f0bSApple OSS Distributions }
53*d4514f0bSApple OSS Distributions }
54*d4514f0bSApple OSS Distributions
55*d4514f0bSApple OSS Distributions static void
_toggle_atm_diagnostic_flag(void)56*d4514f0bSApple OSS Distributions _toggle_atm_diagnostic_flag(void)
57*d4514f0bSApple OSS Distributions {
58*d4514f0bSApple OSS Distributions T_ATEND(_reset_atm_diagnostic_flag);
59*d4514f0bSApple OSS Distributions uint32_t f = _save_atm_diagnostic_flag();
60*d4514f0bSApple OSS Distributions f ^= LIBTRACE_PRIVATE_DATA;
61*d4514f0bSApple OSS Distributions kern_return_t kr = _mutate_atm_diagnostic_flag(f);
62*d4514f0bSApple OSS Distributions if (kr == KERN_NOT_SUPPORTED) {
63*d4514f0bSApple OSS Distributions T_SKIP("Seems ATM is disabled on this platform. "
64*d4514f0bSApple OSS Distributions "Ignoring host_set_atm_diagnostic_flag functionality. "
65*d4514f0bSApple OSS Distributions "Bailing gracefully.");
66*d4514f0bSApple OSS Distributions }
67*d4514f0bSApple OSS Distributions T_EXPECT_MACH_SUCCESS(kr, "Set atm_diagnostic_flag");
68*d4514f0bSApple OSS Distributions }
69*d4514f0bSApple OSS Distributions
70*d4514f0bSApple OSS Distributions T_DECL(atm_diagnostic_flag_entitled_privileged,
71*d4514f0bSApple OSS Distributions "change the atm_diagnostic_flag (entitled, privileged)",
72*d4514f0bSApple OSS Distributions T_META_ASROOT(true))
73*d4514f0bSApple OSS Distributions {
74*d4514f0bSApple OSS Distributions _toggle_atm_diagnostic_flag();
75*d4514f0bSApple OSS Distributions }
76*d4514f0bSApple OSS Distributions
77*d4514f0bSApple OSS Distributions T_DECL(atm_diagnostic_flag_entitled_unprivileged,
78*d4514f0bSApple OSS Distributions "change the atm_diagnostic_flag (entitled, unprivileged)",
79*d4514f0bSApple OSS Distributions T_META_ASROOT(false))
80*d4514f0bSApple OSS Distributions {
81*d4514f0bSApple OSS Distributions if (running_as_root()) {
82*d4514f0bSApple OSS Distributions drop_priv();
83*d4514f0bSApple OSS Distributions }
84*d4514f0bSApple OSS Distributions _toggle_atm_diagnostic_flag();
85*d4514f0bSApple OSS Distributions }
86