arm64: big-endian: don't treat code as data when copying sigret code
Currently the sigreturn compat code is copied to an offset in the vectors table. When using a BE kernel this data will be stored in the wrong endianess so when returning from a signal on a 32-bit BE system, arbitrary code will be executed. Instead of declaring the code inside a struct and copying that, use the assembler's .byte directives to store the code in the correct endianess regardless of platform endianess. Acked-by:Will Deacon <will.deacon@arm.com> Signed-off-by:
Matthew Leach <matthew.leach@arm.com> Signed-off-by:
Catalin Marinas <catalin.marinas@arm.com>
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