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The GXF feature on newer Apple SoCs uses two custom instructions, GENTER and GEXIT. These appear in the iOS kernelcache and SPTM on newer devices.
Their opcodes are:
20 14 20 00: GENTER00 14 20 00: GEXIT
These instructions are not supported by Binary Ninja, and are disassembled as undefined instructions. This is problematic on its own, but also acts as a barrier to disassembling the rest of a function, making it's impact more annoying than just being an undefined instruction.
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Issues with the AArch64 architecture pluginIssues with the AArch64 architecture pluginIssue needs changes to an architecture pluginIssue needs changes to an architecture pluginIssue should take < 1 dayIssue should take < 1 dayIssue adds or blocks important functionalityIssue adds or blocks important functionality