D4d4
A co-worker of mine was looking at some disassembled ARM code the other day, and discovered something weird. Lots of d4d4 instructions, scattered about. LLVM’s objdump says this is a relative branch to -0x58 . The weird part is that they were always unreachable. Experiments¶ Here’s an example in a minimal reproducer I wrote: 00020100 < one >: 20100: 4770 bx lr 20102: d4d4 bmi 0x200ae <__dso_handle+0x100ae> @ imm = #-0x58 That bx lr right before the d4d4 branches to the link register. In other w