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From d10cd86ee32bf76495f79c02df62fc242adbcbe3 Mon Sep 17 00:00:00 2001
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From: Andreas Arnez <arnez@linux.vnet.ibm.com>
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Date: Thu, 26 Jul 2018 16:35:24 +0200
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Subject: [PATCH] s390x: More fixes for z13 support
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This patch addresses the following:
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* Fix the implementation of LOCGHI. Previously Valgrind performed 32-bit
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sign extension instead of 64-bit sign extension on the immediate value.
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* Advertise VXRS in HWCAP. If no VXRS are advertised, but the program
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uses vector registers, this could cause problems with a glibc built with
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"-march=z13".
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---
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VEX/priv/guest_s390_toIR.c | 2 +-
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coregrind/m_initimg/initimg-linux.c | 6 +++---
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2 files changed, 4 insertions(+), 4 deletions(-)
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diff --git a/VEX/priv/guest_s390_toIR.c b/VEX/priv/guest_s390_toIR.c
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index 9c4d79b87..50a5a4177 100644
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--- a/VEX/priv/guest_s390_toIR.c
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+++ b/VEX/priv/guest_s390_toIR.c
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@@ -16325,7 +16325,7 @@ static const HChar *
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s390_irgen_LOCGHI(UChar r1, UChar m3, UShort i2, UChar unused)
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{
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next_insn_if(binop(Iop_CmpEQ32, s390_call_calculate_cond(m3), mkU32(0)));
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- put_gpr_dw0(r1, mkU64((UInt)(Int)(Short)i2));
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+ put_gpr_dw0(r1, mkU64((ULong)(Long)(Short)i2));
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return "locghi";
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}
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diff --git a/coregrind/m_initimg/initimg-linux.c b/coregrind/m_initimg/initimg-linux.c
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index 61cc458bc..8a7f0d024 100644
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--- a/coregrind/m_initimg/initimg-linux.c
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+++ b/coregrind/m_initimg/initimg-linux.c
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@@ -699,9 +699,9 @@ Addr setup_client_stack( void* init_sp,
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}
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# elif defined(VGP_s390x_linux)
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{
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- /* Advertise hardware features "below" TE only. TE and VXRS
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- (and anything above) are not supported by Valgrind. */
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- auxv->u.a_val &= VKI_HWCAP_S390_TE - 1;
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+ /* Advertise hardware features "below" TE and VXRS. TE itself
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+ and anything above VXRS is not supported by Valgrind. */
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+ auxv->u.a_val &= (VKI_HWCAP_S390_TE - 1) | VKI_HWCAP_S390_VXRS;
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}
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# elif defined(VGP_arm64_linux)
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{
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--
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2.17.0
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