This is xnu-12377.1.9. See this file in: xnu-12377.1.9 (Darwin 25) xnu-8792.81.2 (MacOS 18, Darwin 22) xnu-8019 (MacOS 17.0, Darwin 21) xnu-6153.11.26 (MacOS 15.0, Darwin 19) xnu-4903.221.2 (MacOS 14.0, Darwin 18) xnu-4570.41.2 (MacOS 13.3, Darwin 17) xnu-3789.70.16 (MacOS 12.6, Darwin 16) xnu-3248.20.55 (MacOS 11.2, Darwin 15) xnu-2782.40.9 (MacOS 10.10.5, Darwin 14) xnu-2422.115.4 (MacOS 10.9.5, Darwin 13) xnu-2050.24.15 (MacOS 10.8.4, Darwin 12) xnu-1699.32.7 (MacOS 10.7.5, Darwin 11) xnu-1504.15.3 (MacOS 10.6.8, Darwin 10) xnu-1228.15.4 (MacOS 10.5.8, Darwin 9)

Directory listing for xnu-12377.1.9//pexpert/arm

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hwtrace/
pe_bootargs.c
pe_consistent_debug.c
pe_fiq.c
pe_identify_machine.c
pe_init.c
pe_kprintf.c
pe_serial.c