macOS Debug boot-args

debug.h

/* Debug boot-args */
#define DB_HALT		0x1
//#define DB_PRT          	0x2 -- obsolete
#define DB_NMI			0x4
#define DB_KPRT		0x8
#define DB_KDB			0x10
#define DB_ARP          	0x40
#define DB_KDP_BP_DIS   	0x80
//#define DB_LOG_PI_SCRN  	0x100 -- obsolete
#define DB_KDP_GETC_ENA 	0x200

#define DB_KERN_DUMP_ON_PANIC	0x400  /* Trigger core dump on panic*/
#define DB_KERN_DUMP_ON_NMI	0x800  /* Trigger core dump on NMI */
#define DB_DBG_POST_CORE	0x1000 /* Wait in debugger after NMI core */
#define DB_PANICLOG_DUMP	0x2000 /* Send paniclog on panic,not core */
#define DB_REBOOT_POST_CORE	0x4000 /* Attempt to reboot after
					* post-panic crashdump/paniclog
					* dump.
					*/
#define DB_NMI_BTN_ENA  	0x8000  /* Enable button to directly trigger NMI */
#define DB_PRT_KDEBUG   	0x10000 /* kprintf KDEBUG traces */
#define DB_DISABLE_LOCAL_CORE  0x20000 /* ignore local kernel core dump support */
#define DB_DISABLE_GZIP_CORE   0x40000 /* don't gzip kernel core dumps */