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syscall.2: arm: Use real register names for arm/OABI 

The arm OABI syscall interface is currently documented in terms of
register name aliases defined by the ARM Procedure Call Standard
(APCS).  However, these don't make sense in the context of a
binary interface that doesn't comply (or need to comply) with
APCS.

Use the real architectural register names instead.

The names a1-a4, v1... are just aliases for r0-r3, r4... anyway,
so the interface is just the same regardless of which set of names
is used.

Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Dave Martin 2020-05-05 16:24:39 +01:00 committed by Michael Kerrisk
parent 2b38639ab9
commit f13396bc2d
1 changed files with 2 additions and 2 deletions
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4
man2/syscall.2
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@ -201,7 +201,7 @@ Arch/ABI Instruction System Ret Ret Error Notes
_
alpha callsys v0 v0 a4 a3 1, 6
arc trap0 r8 r0 - -
arm/OABI swi NR - a1 - - 2
arm/OABI swi NR - r0 - - 2
arm/EABI swi 0x0 r7 r0 r1 -
arm64 svc #0 x8 x0 x1 -
blackfin excpt 0x0 P0 R0 - -
@ -332,7 +332,7 @@ Arch/ABI arg1 arg2 arg3 arg4 arg5 arg6 arg7 Notes
_
alpha a0 a1 a2 a3 a4 a5 -
arc r0 r1 r2 r3 r4 r5 -
arm/OABI a1 a2 a3 a4 v1 v2 v3
arm/OABI r0 r1 r2 r3 r4 r5 r6
arm/EABI r0 r1 r2 r3 r4 r5 r6
arm64 x0 x1 x2 x3 x4 x5 -
blackfin R0 R1 R2 R3 R4 R5 -