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fix non-ipt mode

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This commit is contained in:
Sergej Schumilo 2024-01-20 21:26:18 +01:00
parent af13f3e73a
commit 1def26f83e
3 changed files with 18 additions and 7 deletions
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5
nyx/hypercall/hypercall.c
View File

@ -110,12 +110,17 @@ bool handle_hypercall_kafl_next_payload(struct kvm_run *run,
REQUEST_SAVE_SNAPSHOT_ROOT_FIX_RIP); REQUEST_SAVE_SNAPSHOT_ROOT_FIX_RIP);
setup_snapshot_once = true; setup_snapshot_once = true;
/* At this point we need to check if PT mode is enabled
* and configured. Otherwise, libxdc_init() will fail.
*/
if(GET_GLOBAL_STATE()->nyx_pt && GET_GLOBAL_STATE()->cap_compile_time_tracing == false) {
for (int i = 0; i < INTEL_PT_MAX_RANGES; i++) { for (int i = 0; i < INTEL_PT_MAX_RANGES; i++) {
if (GET_GLOBAL_STATE()->pt_ip_filter_configured[i]) { if (GET_GLOBAL_STATE()->pt_ip_filter_configured[i]) {
pt_enable_ip_filtering(cpu, i, true, false); pt_enable_ip_filtering(cpu, i, true, false);
} }
} }
pt_init_decoder(cpu); pt_init_decoder(cpu);
}
request_fast_vm_reload(GET_GLOBAL_STATE()->reload_state, request_fast_vm_reload(GET_GLOBAL_STATE()->reload_state,
REQUEST_LOAD_SNAPSHOT_ROOT); REQUEST_LOAD_SNAPSHOT_ROOT);

3
nyx/interface.c
View File

@ -376,9 +376,6 @@ static void check_available_ipt_ranges(nyx_interface_state *s)
} }
} }
} }
else{
nyx_abort("KVM-Nyx support is missing...\n");
}
close(kvm_fd); close(kvm_fd);
} }

9
nyx/pt.c
View File

@ -227,6 +227,15 @@ void pt_init_decoder(CPUState *cpu)
assert(GET_GLOBAL_STATE()->decoder == NULL); assert(GET_GLOBAL_STATE()->decoder == NULL);
assert(GET_GLOBAL_STATE()->shared_bitmap_ptr != NULL); assert(GET_GLOBAL_STATE()->shared_bitmap_ptr != NULL);
assert(GET_GLOBAL_STATE()->shared_bitmap_size != 0); assert(GET_GLOBAL_STATE()->shared_bitmap_size != 0);
if (GET_GLOBAL_STATE()->pt_ip_filter_configured[0] == false &&
GET_GLOBAL_STATE()->pt_ip_filter_configured[1] == false &&
GET_GLOBAL_STATE()->pt_ip_filter_configured[2] == false &&
GET_GLOBAL_STATE()->pt_ip_filter_configured[3] == false) {
nyx_abort("Intel PT mode cannot be enabled without any IP filters configured...\n");
}
GET_GLOBAL_STATE()->decoder = GET_GLOBAL_STATE()->decoder =
libxdc_init(filters, (void *(*)(void *, uint64_t, bool *))page_cache_fetch2, libxdc_init(filters, (void *(*)(void *, uint64_t, bool *))page_cache_fetch2,
GET_GLOBAL_STATE()->page_cache, GET_GLOBAL_STATE()->page_cache,