x86/asm: Add _ASM_RIP() macro for x86-64 (%rip) suffix

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Add a macro _ASM_RIP() to add a (%rip) suffix on 64 bits only. This is
useful for immediate memory references where one doesn't want gcc
to possibly use a register indirection as it may in the case of an "m"
constraint.

Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210910195910.2542662-3-hpa@zytor.com

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H. Peter Anvin (Intel) 2021-09-10 12:59:09 -07:00 • committed by Borislav Petkov

parent 6880fa6c56

commit f87bc8dc7a

1 changed files with 5 additions and 0 deletions

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arch/x86/include/asm/asm.h

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