asm-generic: compat: Support BE for long long args in 32-bit ABIs

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32-bit ABIs support passing 64-bit integers by registers via argument
translation. Commit 59c10c52f5 ("riscv: compat: syscall: Add
compat_sys_call_table implementation") implements the compat_arg_u64
macro for efficiently defining little endian compatibility syscalls.

Architectures supporting big endianness may benefit from reciprocal
argument translation, but are welcome also to implement their own.

Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@anrdb.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220921065605.1051927-10-rmclure@linux.ibm.com

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Rohan McLure 2022-09-21 16:55:49 +10:00 • committed by Michael Ellerman

parent 016ff72bd2

commit 43d5de2b67

1 changed files with 7 additions and 2 deletions

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include/asm-generic/compat.h

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