arm64: big-endian: don't treat code as data when copying sigret code

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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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Matthew Leach 2013-10-11 14:52:14 +01:00 • committed by Catalin Marinas

parent 55b89540b0

commit a1d5ebaf8c

3 changed files with 46 additions and 29 deletions

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42

arch/arm64/kernel/kuser32.S

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28

arch/arm64/kernel/signal32.c

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5

arch/arm64/kernel/vdso.c

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