dev/dtrace/systrace.c

779 typedef struct machtrace_sysent {
786 static machtrace_sysent_t *machtrace_sysent = NULL;
827 	sy = &machtrace_sysent[code];
900 	machtrace_init(mach_trap_table, &machtrace_sysent);
904 		if (machtrace_sysent[i].stsy_underlying == NULL)
918 		machtrace_sysent[i].stsy_entry = DTRACE_IDNONE;
919 		machtrace_sysent[i].stsy_return = DTRACE_IDNONE;
937 		ASSERT(machtrace_sysent[sysnum].stsy_entry == DTRACE_IDNONE);
939 		ASSERT(machtrace_sysent[sysnum].stsy_return == DTRACE_IDNONE);
950 	int enabled = (machtrace_sysent[sysnum].stsy_entry != DTRACE_IDNONE ||
951 			machtrace_sysent[sysnum].stsy_return != DTRACE_IDNONE);
954 		machtrace_sysent[sysnum].stsy_entry = id;
956 		machtrace_sysent[sysnum].stsy_return = id;
966 	if (mach_trap_table[sysnum].mach_trap_function == machtrace_sysent[sysnum].stsy_underlying) {
983 	int disable = (machtrace_sysent[sysnum].stsy_entry == DTRACE_IDNONE ||
984 			machtrace_sysent[sysnum].stsy_return == DTRACE_IDNONE);
991 			ml_nofault_copy((vm_offset_t)&machtrace_sysent[sysnum].stsy_underlying, (vm_offset_t)&mach_trap_table[sysnum].mach_trap_function, sizeof(vm_offset_t));
997 		machtrace_sysent[sysnum].stsy_entry = DTRACE_IDNONE;
999 		machtrace_sysent[sysnum].stsy_return = DTRACE_IDNONE;