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From: Michael Ellerman <mpe@ellerman.id.au>
To: linuxppc-dev@ozlabs.org
Subject: [PATCH v14 7/9] powerpc/vdso: Save and restore TOC pointer on PPC64
Date: Fri, 27 Nov 2020 00:10:04 +1100	[thread overview]
Message-ID: <20201126131006.2431205-7-mpe@ellerman.id.au> (raw)
In-Reply-To: <20201126131006.2431205-1-mpe@ellerman.id.au>

From: Christophe Leroy <christophe.leroy@csgroup.eu>

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/bf21fd9762a124ce3afec34a8e403a44dfdf2f84.1604426550.git.christophe.leroy@csgroup.eu
---
 arch/powerpc/include/asm/vdso/gettimeofday.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

v14: unchanged

diff --git a/arch/powerpc/include/asm/vdso/gettimeofday.h b/arch/powerpc/include/asm/vdso/gettimeofday.h
index 43dd1dc47c37..6f56a6bce615 100644
--- a/arch/powerpc/include/asm/vdso/gettimeofday.h
+++ b/arch/powerpc/include/asm/vdso/gettimeofday.h
@@ -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
-- 
2.25.1


  parent reply	other threads:[~2020-11-26 14:07 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-26 13:09 [PATCH v14 1/9] powerpc/feature: Use CONFIG_PPC64 instead of __powerpc64__ to define possible features Michael Ellerman
2020-11-26 13:09 ` [PATCH v14 2/9] powerpc/processor: Move cpu_relax() into asm/vdso/processor.h Michael Ellerman
2020-11-26 13:10 ` [PATCH v14 3/9] powerpc/time: Move timebase functions into new asm/vdso/timebase.h Michael Ellerman
2020-11-26 13:10 ` [PATCH v14 4/9] powerpc/time: Fix mftb()/get_tb() for use with the compat VDSO Michael Ellerman
2020-11-26 13:10 ` [PATCH v14 5/9] powerpc/barrier: Use CONFIG_PPC64 for barrier selection Michael Ellerman
2020-11-26 13:10 ` [PATCH v14 6/9] powerpc/vdso: Prepare for switching VDSO to generic C implementation Michael Ellerman
2020-11-26 13:10 ` Michael Ellerman [this message]
2020-11-26 13:10 ` [PATCH v14 8/9] powerpc/vdso: Switch " Michael Ellerman
2020-11-26 13:20   ` Christophe Leroy
2020-11-26 13:10 ` [PATCH v14 9/9] powerpc/vdso: Provide __kernel_clock_gettime64() on vdso32 Michael Ellerman
2020-12-10 11:30 ` [PATCH v14 1/9] powerpc/feature: Use CONFIG_PPC64 instead of __powerpc64__ to define possible features Michael Ellerman
     [not found] ` <20201126131006.2431205-6-mpe__7176.90246399201$1606398872$gmane$org@ellerman.id.au>
2020-12-26  9:49   ` [PATCH v14 6/9] powerpc/vdso: Prepare for switching VDSO to generic C implementation Andreas Schwab

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