Unhandled iPhone Air 26.0 kernel instructions

[withzombies]

Version and Platform (required):

• Binary Ninja Version: 5.2.8218-dev, 60b14381
• OS: macos
• OS Version: 15.7
• CPU Architecture: arm64

Bug Description:
the new iPhone Air/17 introduced some new features which depend on new ARM instructions

Steps To Reproduce:
Load in the kernelcache.release.iPhone18,4 from the 26.0 IPSW, browse to 0xFFFFFE000842D1EC (which should be arm_vm_init). Notice the missing instructions following the mcr operations:

fffffe000842d460  481018d5   msr     cpacr_el1, x8
fffffe000842d464  df3f03d5   isb     
fffffe000842d468  e8018052   mov     w8, #0xf
fffffe000842d46c  0800a872   movk    w8, #0x4000, lsl #0x10  {0x4000000f}
fffffe000842d470  c81218d5   msr     smcr_el1, x8
🚫fffffe000842d474  2858bf04   ??

Expected Behavior:
Full perfect disassembly

Screenshots:

Binary:
https://ipsw.me/install/iPhone18,4/23A341

Additional Information:

[WeiN76LQh]

There are also a number of instructions not being lifted. Mostly MTE related ones.

[psifertex]

Unlifted but disassembled instructions are tracked in #4001 -- linking the issues together

[bdash]

Builds 5.2.8310-dev and newer contain the support for disassembling these new instructions, which are primarily from the FEAT_CSSC group.

[withzombies]

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