linux-kernel - Re: [PATCH 01/12] selftests/x86: Extend Makefile to allow 64-bit only tests

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Date:	Wed, 9 Dec 2015 10:55:11 -0800
From:	Andy Lutomirski <luto@...capital.net>
To:	Borislav Petkov <bp@...en8.de>
Cc:	Andy Lutomirski <luto@...nel.org>, X86 ML <x86@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Brian Gerst <brgerst@...il.com>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 01/12] selftests/x86: Extend Makefile to allow 64-bit only tests

On Tue, Dec 8, 2015 at 1:34 AM, Borislav Petkov <bp@...en8.de> wrote:
> On Mon, Dec 07, 2015 at 01:51:26PM -0800, Andy Lutomirski wrote:
>> There aren't any yet, but there might be a few some day.
>>
>> Signed-off-by: Andy Lutomirski <luto@...nel.org>
>> ---
>>  tools/testing/selftests/x86/Makefile | 5 +++--
>>  1 file changed, 3 insertions(+), 2 deletions(-)
>>
>> diff --git a/tools/testing/selftests/x86/Makefile b/tools/testing/selftests/x86/Makefile
>> index 389701f59940..a460fe7c5365 100644
>> --- a/tools/testing/selftests/x86/Makefile
>> +++ b/tools/testing/selftests/x86/Makefile
>> @@ -8,8 +8,9 @@ TARGETS_C_BOTHBITS := single_step_syscall sysret_ss_attrs ldt_gdt syscall_nt ptr
>>  TARGETS_C_32BIT_ONLY := entry_from_vm86 syscall_arg_fault sigreturn test_syscall_vdso unwind_vdso
>>
>>  TARGETS_C_32BIT_ALL := $(TARGETS_C_BOTHBITS) $(TARGETS_C_32BIT_ONLY)
>> +TARGETS_C_64BIT_ALL := $(TARGETS_C_BOTHBITS) $(TARGETS_C_64BIT_ONLY)
>>  BINARIES_32 := $(TARGETS_C_32BIT_ALL:%=%_32)
>> -BINARIES_64 := $(TARGETS_C_BOTHBITS:%=%_64)
>> +BINARIES_64 := $(TARGETS_C_64BIT_ALL:%=%_64)
>>
>>  CFLAGS := -O2 -g -std=gnu99 -pthread -Wall
>>
>> @@ -37,7 +38,7 @@ clean:
>>  $(TARGETS_C_32BIT_ALL:%=%_32): %_32: %.c
>>       $(CC) -m32 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $^ -lrt -ldl
>>
>> -$(TARGETS_C_BOTHBITS:%=%_64): %_64: %.c
>> +$(TARGETS_C_64BIT_ALL:%=%_64): %_64: %.c
>>       $(CC) -m64 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $^ -lrt -ldl
>>
>>  # x86_64 users should be encouraged to install 32-bit libraries
>> --
>
> It doesn't build some of the tests here if I run make in the x86 dir.
> This is unrelated but maybe for the future we should add some feature
> testing like perf tool does to warn people if stuff is missing on the
> system...
>
> $ cd tools/testing/selftests/x86
> $ make
> gcc -m32 -o single_step_syscall_32 -O2 -g -std=gnu99 -pthread -Wall  single_step_syscall.c -lrt -ldl -lm
> gcc -m32 -o sysret_ss_attrs_32 -O2 -g -std=gnu99 -pthread -Wall  sysret_ss_attrs.c -lrt -ldl -lm
> gcc -m32 -o ldt_gdt_32 -O2 -g -std=gnu99 -pthread -Wall  ldt_gdt.c -lrt -ldl -lm
> gcc -m32 -o syscall_nt_32 -O2 -g -std=gnu99 -pthread -Wall  syscall_nt.c -lrt -ldl -lm
> gcc -m32 -o ptrace_syscall_32 -O2 -g -std=gnu99 -pthread -Wall  ptrace_syscall.c raw_syscall_helper_32.S -lrt -ldl -lm
> gcc -m32 -o entry_from_vm86_32 -O2 -g -std=gnu99 -pthread -Wall  entry_from_vm86.c -lrt -ldl -lm
> gcc -m32 -o syscall_arg_fault_32 -O2 -g -std=gnu99 -pthread -Wall  syscall_arg_fault.c -lrt -ldl -lm
> gcc -m32 -o sigreturn_32 -O2 -g -std=gnu99 -pthread -Wall  sigreturn.c -lrt -ldl -lm
> gcc -m32 -o test_syscall_vdso_32 -O2 -g -std=gnu99 -pthread -Wall  test_syscall_vdso.c thunks_32.S -lrt -ldl -lm
> In file included from ptrace_syscall.c:6:0:
> /usr/include/sys/syscall.h:24:24: fatal error: asm/unistd.h: No such file or directory
> compilation terminated.
> In file included from entry_from_vm86.c:14:0:
> /usr/include/sys/syscall.h:24:24: fatal error: asm/unistd.h: No such file or directory
> compilation terminated.

Ick.  What are you missing?  That's weird.

We actually do have a test in the makefile, but it's obviously
incomplete given the failure you're seeing.

--Andy
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