1*27b03b36SApple OSS Distributions #include <darwintest.h>
2*27b03b36SApple OSS Distributions
3*27b03b36SApple OSS Distributions #include <mach/mach_error.h>
4*27b03b36SApple OSS Distributions #include <mach/mach_host.h>
5*27b03b36SApple OSS Distributions
6*27b03b36SApple OSS Distributions T_GLOBAL_META(T_META_NAMESPACE("xnu.debugging"));
7*27b03b36SApple OSS Distributions
8*27b03b36SApple OSS Distributions /*
9*27b03b36SApple OSS Distributions * The low 8 bits may be in use, so modify one
10*27b03b36SApple OSS Distributions * of the upper 8 bits to ensure round-tripping.
11*27b03b36SApple OSS Distributions */
12*27b03b36SApple OSS Distributions #define LIBTRACE_PRIVATE_DATA 0x01000000
13*27b03b36SApple OSS Distributions
14*27b03b36SApple OSS Distributions extern void drop_priv(void);
15*27b03b36SApple OSS Distributions
16*27b03b36SApple OSS Distributions static bool _needs_reset;
17*27b03b36SApple OSS Distributions static uint32_t _original;
18*27b03b36SApple OSS Distributions
19*27b03b36SApple OSS Distributions static uint32_t
_save_atm_diagnostic_flag(void)20*27b03b36SApple OSS Distributions _save_atm_diagnostic_flag(void)
21*27b03b36SApple OSS Distributions {
22*27b03b36SApple OSS Distributions kern_return_t kr;
23*27b03b36SApple OSS Distributions kr = host_get_atm_diagnostic_flag(mach_host_self(), &_original);
24*27b03b36SApple OSS Distributions T_QUIET; T_ASSERT_MACH_SUCCESS(kr, "host_get_atm_diagnostic_flag()");
25*27b03b36SApple OSS Distributions T_LOG("Original ATM diagnostic flag: 0x%08x", _original);
26*27b03b36SApple OSS Distributions return _original;
27*27b03b36SApple OSS Distributions }
28*27b03b36SApple OSS Distributions
29*27b03b36SApple OSS Distributions static kern_return_t
_mutate_atm_diagnostic_flag(uint32_t v)30*27b03b36SApple OSS Distributions _mutate_atm_diagnostic_flag(uint32_t v)
31*27b03b36SApple OSS Distributions {
32*27b03b36SApple OSS Distributions T_LOG("Try to set ATM diagnostic flag to: 0x%08x", v);
33*27b03b36SApple OSS Distributions kern_return_t kr = host_set_atm_diagnostic_flag(mach_host_self(), v);
34*27b03b36SApple OSS Distributions if (kr == KERN_SUCCESS) {
35*27b03b36SApple OSS Distributions _needs_reset = true;
36*27b03b36SApple OSS Distributions }
37*27b03b36SApple OSS Distributions return kr;
38*27b03b36SApple OSS Distributions }
39*27b03b36SApple OSS Distributions
40*27b03b36SApple OSS Distributions static void
_reset_atm_diagnostic_flag(void)41*27b03b36SApple OSS Distributions _reset_atm_diagnostic_flag(void)
42*27b03b36SApple OSS Distributions {
43*27b03b36SApple OSS Distributions if (!_needs_reset) {
44*27b03b36SApple OSS Distributions return;
45*27b03b36SApple OSS Distributions }
46*27b03b36SApple OSS Distributions T_LOG("Reset ATM diagnostic flag to: 0x%08x", _original);
47*27b03b36SApple OSS Distributions kern_return_t kr;
48*27b03b36SApple OSS Distributions kr = host_set_atm_diagnostic_flag(mach_host_self(), _original);
49*27b03b36SApple OSS Distributions if (kr != KERN_SUCCESS) {
50*27b03b36SApple OSS Distributions T_ASSERT_FAIL("host_set_atm_diagnostic_flag() failed: %s",
51*27b03b36SApple OSS Distributions mach_error_string(kr));
52*27b03b36SApple OSS Distributions }
53*27b03b36SApple OSS Distributions }
54*27b03b36SApple OSS Distributions
55*27b03b36SApple OSS Distributions static void
_toggle_atm_diagnostic_flag(void)56*27b03b36SApple OSS Distributions _toggle_atm_diagnostic_flag(void)
57*27b03b36SApple OSS Distributions {
58*27b03b36SApple OSS Distributions T_ATEND(_reset_atm_diagnostic_flag);
59*27b03b36SApple OSS Distributions uint32_t f = _save_atm_diagnostic_flag();
60*27b03b36SApple OSS Distributions f ^= LIBTRACE_PRIVATE_DATA;
61*27b03b36SApple OSS Distributions kern_return_t kr = _mutate_atm_diagnostic_flag(f);
62*27b03b36SApple OSS Distributions if (kr == KERN_NOT_SUPPORTED) {
63*27b03b36SApple OSS Distributions T_SKIP("Seems ATM is disabled on this platform. "
64*27b03b36SApple OSS Distributions "Ignoring host_set_atm_diagnostic_flag functionality. "
65*27b03b36SApple OSS Distributions "Bailing gracefully.");
66*27b03b36SApple OSS Distributions }
67*27b03b36SApple OSS Distributions T_EXPECT_MACH_ERROR(KERN_NO_ACCESS, kr,
68*27b03b36SApple OSS Distributions "Deny change to atm_diagnostic_flag");
69*27b03b36SApple OSS Distributions }
70*27b03b36SApple OSS Distributions
71*27b03b36SApple OSS Distributions T_DECL(atm_diagnostic_flag_unentitled_privileged,
72*27b03b36SApple OSS Distributions "expect to fail to set the atm_diagnostic_flag (unentitled, privileged)",
73*27b03b36SApple OSS Distributions T_META_ASROOT(true))
74*27b03b36SApple OSS Distributions {
75*27b03b36SApple OSS Distributions _toggle_atm_diagnostic_flag();
76*27b03b36SApple OSS Distributions }
77*27b03b36SApple OSS Distributions
78*27b03b36SApple OSS Distributions T_DECL(atm_diagnostic_flag_unentitled_unprivileged,
79*27b03b36SApple OSS Distributions "expect to fail to set the atm_diagnostic_flag (unentitled, unprivileged)",
80*27b03b36SApple OSS Distributions T_META_ASROOT(false))
81*27b03b36SApple OSS Distributions {
82*27b03b36SApple OSS Distributions drop_priv();
83*27b03b36SApple OSS Distributions _toggle_atm_diagnostic_flag();
84*27b03b36SApple OSS Distributions }
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