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Use a callee-saved register to be AAPCS-compliant

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x8 is not a callee-saved register and can be corrupted.
Use x19 instead to be AAPCS-compliant.

Fixes ARM-software/tf-issues#478

Change-Id: Ib4f114c36f4c11351ae856f953c45dca92b27c3b
Signed-off-by: dp-arm <dimitris.papastamos@arm.com>
This commit is contained in:
dp-arm 2017-05-05 12:21:03 +01:00
parent e715e676e3
commit 22fa58cbfa
1 changed files with 4 additions and 4 deletions
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8
lib/cpus/aarch64/cpu_helpers.S
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@ -259,8 +259,8 @@ func print_errata_status
/*
* Printing errata status requires atomically testing the printed flag.
*/
stp x8, x30, [sp, #-16]!
mov x8, x0
stp x19, x30, [sp, #-16]!
mov x19, x0
/*
* Load pointers to errata lock and printed flag. Call
@ -270,8 +270,8 @@ func print_errata_status
ldr x0, [x1, #CPU_ERRATA_LOCK]
ldr x1, [x1, #CPU_ERRATA_PRINTED]
bl errata_needs_reporting
mov x1, x8
ldp x8, x30, [sp], #16
mov x1, x19
ldp x19, x30, [sp], #16
cbnz x0, .Lprint
#endif
.Lnoprint: