1*e3723e1fSApple OSS Distributions #include <darwintest.h>
2*e3723e1fSApple OSS Distributions
3*e3723e1fSApple OSS Distributions #include <mach/mach_error.h>
4*e3723e1fSApple OSS Distributions #include <mach/mach_host.h>
5*e3723e1fSApple OSS Distributions
6*e3723e1fSApple OSS Distributions #include "drop_priv.h"
7*e3723e1fSApple OSS Distributions
8*e3723e1fSApple OSS Distributions T_GLOBAL_META(T_META_NAMESPACE("xnu.debugging"));
9*e3723e1fSApple OSS Distributions
10*e3723e1fSApple OSS Distributions /*
11*e3723e1fSApple OSS Distributions * The low 8 bits may be in use, so modify one
12*e3723e1fSApple OSS Distributions * of the upper 8 bits to ensure round-tripping.
13*e3723e1fSApple OSS Distributions */
14*e3723e1fSApple OSS Distributions #define LIBTRACE_PRIVATE_DATA 0x01000000
15*e3723e1fSApple OSS Distributions
16*e3723e1fSApple OSS Distributions static bool _needs_reset;
17*e3723e1fSApple OSS Distributions static uint32_t _original;
18*e3723e1fSApple OSS Distributions
19*e3723e1fSApple OSS Distributions static uint32_t
_save_atm_diagnostic_flag(void)20*e3723e1fSApple OSS Distributions _save_atm_diagnostic_flag(void)
21*e3723e1fSApple OSS Distributions {
22*e3723e1fSApple OSS Distributions kern_return_t kr;
23*e3723e1fSApple OSS Distributions kr = host_get_atm_diagnostic_flag(mach_host_self(), &_original);
24*e3723e1fSApple OSS Distributions T_QUIET; T_ASSERT_MACH_SUCCESS(kr, "host_get_atm_diagnostic_flag()");
25*e3723e1fSApple OSS Distributions T_LOG("Original ATM diagnostic flag: 0x%08x", _original);
26*e3723e1fSApple OSS Distributions return _original;
27*e3723e1fSApple OSS Distributions }
28*e3723e1fSApple OSS Distributions
29*e3723e1fSApple OSS Distributions static kern_return_t
_mutate_atm_diagnostic_flag(uint32_t v)30*e3723e1fSApple OSS Distributions _mutate_atm_diagnostic_flag(uint32_t v)
31*e3723e1fSApple OSS Distributions {
32*e3723e1fSApple OSS Distributions T_LOG("Try to set ATM diagnostic flag to: 0x%08x", v);
33*e3723e1fSApple OSS Distributions kern_return_t kr = host_set_atm_diagnostic_flag(mach_host_self(), v);
34*e3723e1fSApple OSS Distributions if (kr == KERN_SUCCESS) {
35*e3723e1fSApple OSS Distributions _needs_reset = true;
36*e3723e1fSApple OSS Distributions }
37*e3723e1fSApple OSS Distributions return kr;
38*e3723e1fSApple OSS Distributions }
39*e3723e1fSApple OSS Distributions
40*e3723e1fSApple OSS Distributions static void
_reset_atm_diagnostic_flag(void)41*e3723e1fSApple OSS Distributions _reset_atm_diagnostic_flag(void)
42*e3723e1fSApple OSS Distributions {
43*e3723e1fSApple OSS Distributions if (!_needs_reset) {
44*e3723e1fSApple OSS Distributions return;
45*e3723e1fSApple OSS Distributions }
46*e3723e1fSApple OSS Distributions T_LOG("Reset ATM diagnostic flag to: 0x%08x", _original);
47*e3723e1fSApple OSS Distributions kern_return_t kr;
48*e3723e1fSApple OSS Distributions kr = host_set_atm_diagnostic_flag(mach_host_self(), _original);
49*e3723e1fSApple OSS Distributions if (kr != KERN_SUCCESS) {
50*e3723e1fSApple OSS Distributions T_ASSERT_FAIL("host_set_atm_diagnostic_flag() failed: %s",
51*e3723e1fSApple OSS Distributions mach_error_string(kr));
52*e3723e1fSApple OSS Distributions }
53*e3723e1fSApple OSS Distributions }
54*e3723e1fSApple OSS Distributions
55*e3723e1fSApple OSS Distributions static void
_toggle_atm_diagnostic_flag(void)56*e3723e1fSApple OSS Distributions _toggle_atm_diagnostic_flag(void)
57*e3723e1fSApple OSS Distributions {
58*e3723e1fSApple OSS Distributions T_ATEND(_reset_atm_diagnostic_flag);
59*e3723e1fSApple OSS Distributions uint32_t f = _save_atm_diagnostic_flag();
60*e3723e1fSApple OSS Distributions f ^= LIBTRACE_PRIVATE_DATA;
61*e3723e1fSApple OSS Distributions kern_return_t kr = _mutate_atm_diagnostic_flag(f);
62*e3723e1fSApple OSS Distributions if (kr == KERN_NOT_SUPPORTED) {
63*e3723e1fSApple OSS Distributions T_SKIP("Seems ATM is disabled on this platform. "
64*e3723e1fSApple OSS Distributions "Ignoring host_set_atm_diagnostic_flag functionality. "
65*e3723e1fSApple OSS Distributions "Bailing gracefully.");
66*e3723e1fSApple OSS Distributions }
67*e3723e1fSApple OSS Distributions T_EXPECT_MACH_SUCCESS(kr, "Set atm_diagnostic_flag");
68*e3723e1fSApple OSS Distributions }
69*e3723e1fSApple OSS Distributions
70*e3723e1fSApple OSS Distributions T_DECL(atm_diagnostic_flag_entitled_privileged,
71*e3723e1fSApple OSS Distributions "change the atm_diagnostic_flag (entitled, privileged)",
72*e3723e1fSApple OSS Distributions T_META_ASROOT(true))
73*e3723e1fSApple OSS Distributions {
74*e3723e1fSApple OSS Distributions _toggle_atm_diagnostic_flag();
75*e3723e1fSApple OSS Distributions }
76*e3723e1fSApple OSS Distributions
77*e3723e1fSApple OSS Distributions T_DECL(atm_diagnostic_flag_entitled_unprivileged,
78*e3723e1fSApple OSS Distributions "change the atm_diagnostic_flag (entitled, unprivileged)",
79*e3723e1fSApple OSS Distributions T_META_ASROOT(false))
80*e3723e1fSApple OSS Distributions {
81*e3723e1fSApple OSS Distributions if (running_as_root()) {
82*e3723e1fSApple OSS Distributions drop_priv();
83*e3723e1fSApple OSS Distributions }
84*e3723e1fSApple OSS Distributions _toggle_atm_diagnostic_flag();
85*e3723e1fSApple OSS Distributions }
86