1*94d3b452SApple OSS Distributions #include <darwintest.h>
2*94d3b452SApple OSS Distributions
3*94d3b452SApple OSS Distributions #include <mach/mach_error.h>
4*94d3b452SApple OSS Distributions #include <mach/mach_host.h>
5*94d3b452SApple OSS Distributions
6*94d3b452SApple OSS Distributions #include "drop_priv.h"
7*94d3b452SApple OSS Distributions
8*94d3b452SApple OSS Distributions T_GLOBAL_META(T_META_NAMESPACE("xnu.debugging"));
9*94d3b452SApple OSS Distributions
10*94d3b452SApple OSS Distributions /*
11*94d3b452SApple OSS Distributions * The low 8 bits may be in use, so modify one
12*94d3b452SApple OSS Distributions * of the upper 8 bits to ensure round-tripping.
13*94d3b452SApple OSS Distributions */
14*94d3b452SApple OSS Distributions #define LIBTRACE_PRIVATE_DATA 0x01000000
15*94d3b452SApple OSS Distributions
16*94d3b452SApple OSS Distributions static bool _needs_reset;
17*94d3b452SApple OSS Distributions static uint32_t _original;
18*94d3b452SApple OSS Distributions
19*94d3b452SApple OSS Distributions static uint32_t
_save_atm_diagnostic_flag(void)20*94d3b452SApple OSS Distributions _save_atm_diagnostic_flag(void)
21*94d3b452SApple OSS Distributions {
22*94d3b452SApple OSS Distributions kern_return_t kr;
23*94d3b452SApple OSS Distributions kr = host_get_atm_diagnostic_flag(mach_host_self(), &_original);
24*94d3b452SApple OSS Distributions T_QUIET; T_ASSERT_MACH_SUCCESS(kr, "host_get_atm_diagnostic_flag()");
25*94d3b452SApple OSS Distributions T_LOG("Original ATM diagnostic flag: 0x%08x", _original);
26*94d3b452SApple OSS Distributions return _original;
27*94d3b452SApple OSS Distributions }
28*94d3b452SApple OSS Distributions
29*94d3b452SApple OSS Distributions static kern_return_t
_mutate_atm_diagnostic_flag(uint32_t v)30*94d3b452SApple OSS Distributions _mutate_atm_diagnostic_flag(uint32_t v)
31*94d3b452SApple OSS Distributions {
32*94d3b452SApple OSS Distributions T_LOG("Try to set ATM diagnostic flag to: 0x%08x", v);
33*94d3b452SApple OSS Distributions kern_return_t kr = host_set_atm_diagnostic_flag(mach_host_self(), v);
34*94d3b452SApple OSS Distributions if (kr == KERN_SUCCESS) {
35*94d3b452SApple OSS Distributions _needs_reset = true;
36*94d3b452SApple OSS Distributions }
37*94d3b452SApple OSS Distributions return kr;
38*94d3b452SApple OSS Distributions }
39*94d3b452SApple OSS Distributions
40*94d3b452SApple OSS Distributions static void
_reset_atm_diagnostic_flag(void)41*94d3b452SApple OSS Distributions _reset_atm_diagnostic_flag(void)
42*94d3b452SApple OSS Distributions {
43*94d3b452SApple OSS Distributions if (!_needs_reset) {
44*94d3b452SApple OSS Distributions return;
45*94d3b452SApple OSS Distributions }
46*94d3b452SApple OSS Distributions T_LOG("Reset ATM diagnostic flag to: 0x%08x", _original);
47*94d3b452SApple OSS Distributions kern_return_t kr;
48*94d3b452SApple OSS Distributions kr = host_set_atm_diagnostic_flag(mach_host_self(), _original);
49*94d3b452SApple OSS Distributions if (kr != KERN_SUCCESS) {
50*94d3b452SApple OSS Distributions T_ASSERT_FAIL("host_set_atm_diagnostic_flag() failed: %s",
51*94d3b452SApple OSS Distributions mach_error_string(kr));
52*94d3b452SApple OSS Distributions }
53*94d3b452SApple OSS Distributions }
54*94d3b452SApple OSS Distributions
55*94d3b452SApple OSS Distributions static void
_toggle_atm_diagnostic_flag(void)56*94d3b452SApple OSS Distributions _toggle_atm_diagnostic_flag(void)
57*94d3b452SApple OSS Distributions {
58*94d3b452SApple OSS Distributions T_ATEND(_reset_atm_diagnostic_flag);
59*94d3b452SApple OSS Distributions uint32_t f = _save_atm_diagnostic_flag();
60*94d3b452SApple OSS Distributions f ^= LIBTRACE_PRIVATE_DATA;
61*94d3b452SApple OSS Distributions kern_return_t kr = _mutate_atm_diagnostic_flag(f);
62*94d3b452SApple OSS Distributions if (kr == KERN_NOT_SUPPORTED) {
63*94d3b452SApple OSS Distributions T_SKIP("Seems ATM is disabled on this platform. "
64*94d3b452SApple OSS Distributions "Ignoring host_set_atm_diagnostic_flag functionality. "
65*94d3b452SApple OSS Distributions "Bailing gracefully.");
66*94d3b452SApple OSS Distributions }
67*94d3b452SApple OSS Distributions T_EXPECT_MACH_SUCCESS(kr, "Set atm_diagnostic_flag");
68*94d3b452SApple OSS Distributions }
69*94d3b452SApple OSS Distributions
70*94d3b452SApple OSS Distributions T_DECL(atm_diagnostic_flag_entitled_privileged,
71*94d3b452SApple OSS Distributions "change the atm_diagnostic_flag (entitled, privileged)",
72*94d3b452SApple OSS Distributions T_META_ASROOT(true))
73*94d3b452SApple OSS Distributions {
74*94d3b452SApple OSS Distributions _toggle_atm_diagnostic_flag();
75*94d3b452SApple OSS Distributions }
76*94d3b452SApple OSS Distributions
77*94d3b452SApple OSS Distributions T_DECL(atm_diagnostic_flag_entitled_unprivileged,
78*94d3b452SApple OSS Distributions "change the atm_diagnostic_flag (entitled, unprivileged)",
79*94d3b452SApple OSS Distributions T_META_ASROOT(false))
80*94d3b452SApple OSS Distributions {
81*94d3b452SApple OSS Distributions if (running_as_root()) {
82*94d3b452SApple OSS Distributions drop_priv();
83*94d3b452SApple OSS Distributions }
84*94d3b452SApple OSS Distributions _toggle_atm_diagnostic_flag();
85*94d3b452SApple OSS Distributions }
86