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Date: Thu, 18 Feb 2016 11:21:45 -0500 (EST) From: Nicolas Pitre <nicolas.pitre@...aro.org> To: Arnd Bergmann <arnd@...db.de> cc: Russell King <linux@....linux.org.uk>, linux-arm-kernel@...ts.infradead.org, Ard Biesheuvel <ard.biesheuvel@...aro.org>, Jon Medhurst <tixy@...aro.org>, Marc Zyngier <marc.zyngier@....com>, linux-kernel@...r.kernel.org Subject: Re: [PATCH 9/9] ARM: fix kprobe test with CONFIG_CPU_32v3 On Thu, 18 Feb 2016, Arnd Bergmann wrote: > ARMv3 did not have 16-bit load/store or 32-bit multiply instructions, > so building the kprobe test code fails with lots of warnings about > these: > > /tmp/ccI4SKHx.s:19585: Error: selected processor does not support ARM mode `umull r0,r1,r2,r3' > /tmp/ccI4SKHx.s:19617: Error: selected processor does not support ARM mode `umullls r7,r8,r9,r10' > /tmp/ccI4SKHx.s:19645: Error: selected processor does not support ARM mode `umull lr,r12,r11,r13' > /tmp/ccI4SKHx.s:19727: Error: selected processor does not support ARM mode `umulls r0,r1,r2,r3' > ... > /tmp/ccI4SKHx.s:21273: Error: selected processor does not support ARM mode `strh r0,[r1,-r2]' > /tmp/ccI4SKHx.s:21309: Error: selected processor does not support ARM mode `streqh r14,[r11,r12]' > /tmp/ccI4SKHx.s:21333: Error: selected processor does not support ARM mode `streqh r14,[r13,r12]' > > This puts all the affected instructions inside an #ifdef section, > like we do for the other architecture levels. > > Signed-off-by: Arnd Bergmann <arnd@...db.de> Acked-by: Nicolas Pitre <nico@...aro.org> > --- > arch/arm/probes/kprobes/test-arm.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/arch/arm/probes/kprobes/test-arm.c b/arch/arm/probes/kprobes/test-arm.c > index 8866aedfdea2..4e8511f0582d 100644 > --- a/arch/arm/probes/kprobes/test-arm.c > +++ b/arch/arm/probes/kprobes/test-arm.c > @@ -391,6 +391,7 @@ void kprobe_arm_test_cases(void) > TEST_UNSUPPORTED(__inst_arm(0xe0700090) " @ undef") > TEST_UNSUPPORTED(__inst_arm(0xe07fff9f) " @ undef") > > +#if __LINUX_ARM_ARCH__ >= 4 > TEST_RR( "umull r0, r1, r",2, VAL1,", r",3, VAL2,"") > TEST_RR( "umullls r7, r8, r",9, VAL2,", r",10, VAL1,"") > TEST_R( "umull lr, r12, r",11,VAL3,", r13") > @@ -436,6 +437,7 @@ void kprobe_arm_test_cases(void) > TEST_UNSUPPORTED(__inst_arm(0xe0f0f392) " @ smlals r0, pc, r2, r3") > TEST_UNSUPPORTED(__inst_arm(0xe0f0139f) " @ smlals r0, r1, pc, r3") > TEST_UNSUPPORTED(__inst_arm(0xe0f01f92) " @ smlals r0, r1, r2, pc") > +#endif > > TEST_GROUP("Synchronization primitives") > > @@ -478,7 +480,7 @@ void kprobe_arm_test_cases(void) > TEST_UNSUPPORTED("ldrexh r2, [sp]") > #endif > TEST_GROUP("Extra load/store instructions") > - > +#if __LINUX_ARM_ARCH__ >= 4 > TEST_RPR( "strh r",0, VAL1,", [r",1, 48,", -r",2, 24,"]") > TEST_RPR( "streqh r",14,VAL2,", [r",11,0, ", r",12, 48,"]") > TEST_UNSUPPORTED( "streqh r14, [r13, r12]") > @@ -560,6 +562,7 @@ void kprobe_arm_test_cases(void) > TEST( "ldrsh r0, [pc, #0]") > TEST_UNSUPPORTED(__inst_arm(0xe1ffc3f0) " @ ldrsh r12, [pc, #48]!") > TEST_UNSUPPORTED(__inst_arm(0xe0d9f3f0) " @ ldrsh pc, [r9], #48") > +#endif > > #if __LINUX_ARM_ARCH__ >= 7 > TEST_UNSUPPORTED("strht r1, [r2], r3") > -- > 2.7.0 > >
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