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powerpc/vdso: Save and restore TOC pointer on PPC64

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On PPC64, the TOC pointer needs to be saved and restored.

Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201126131006.2431205-7-mpe@ellerman.id.au
This commit is contained in:
Christophe Leroy 2020-11-27 00:10:04 +11:00 committed by Michael Ellerman
parent ce7d8056e3
commit 7fec9f5d41
1 changed files with 12 additions and 0 deletions
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12
arch/powerpc/include/asm/vdso/gettimeofday.h
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@ -19,10 +19,16 @@
.cfi_register lr, r0
PPC_STLU r1, -PPC_MIN_STKFRM(r1)
PPC_STL r0, PPC_MIN_STKFRM + PPC_LR_STKOFF(r1)
#ifdef __powerpc64__
PPC_STL r2, PPC_MIN_STKFRM + STK_GOT(r1)
#endif
get_datapage r5, r0
addi r5, r5, VDSO_DATA_OFFSET
bl DOTSYM(\funct)
PPC_LL r0, PPC_MIN_STKFRM + PPC_LR_STKOFF(r1)
#ifdef __powerpc64__
PPC_LL r2, PPC_MIN_STKFRM + STK_GOT(r1)
#endif
cmpwi r3, 0
mtlr r0
.cfi_restore lr
@ -42,10 +48,16 @@
.cfi_register lr, r0
PPC_STLU r1, -PPC_MIN_STKFRM(r1)
PPC_STL r0, PPC_MIN_STKFRM + PPC_LR_STKOFF(r1)
#ifdef __powerpc64__
PPC_STL r2, PPC_MIN_STKFRM + STK_GOT(r1)
#endif
get_datapage r4, r0
addi r4, r4, VDSO_DATA_OFFSET
bl DOTSYM(\funct)
PPC_LL r0, PPC_MIN_STKFRM + PPC_LR_STKOFF(r1)
#ifdef __powerpc64__
PPC_LL r2, PPC_MIN_STKFRM + STK_GOT(r1)
#endif
crclr so
mtlr r0
.cfi_restore lr