[PATCH 0/3] XTF: small fixes

[PATCH 0/3] XTF: small fixes

[Roger Pau Monne]

Hello,

This is a series of very small fixes for XTF, the first two are code fixes, 
while the last one is a build system fix.

Thanks, Roger.


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[PATCH 1/3] xtf: don't re-define __noinline

[Roger Pau Monne]

On FreeBSD __noinline is already defined in cdefs.h

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
---
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
---
 include/xtf/compiler.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/xtf/compiler.h b/include/xtf/compiler.h
index 47d929c..251b853 100644
--- a/include/xtf/compiler.h
+++ b/include/xtf/compiler.h
@@ -4,7 +4,9 @@
 #define __aligned(x)          __attribute__((__aligned__(x)))
 #define __packed              __attribute__((__packed__))
 
+#ifndef __noinline /* Avoid conflicting with cdefs.h */
 #define __noinline            __attribute__((__noinline__))
+#endif
 
 #ifndef __always_inline /* Avoid conflicting with cdefs.h */
 #define __always_inline       __attribute__((__always_inline__))
-- 
2.7.4 (Apple Git-66)


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[PATCH 2/3] xtf: avoid shifting a negative value

[Roger Pau Monne]

Because it's undefined behaviour.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
---
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
---
 include/arch/x86/processor.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/arch/x86/processor.h b/include/arch/x86/processor.h
index c9f253f..841953c 100644
--- a/include/arch/x86/processor.h
+++ b/include/arch/x86/processor.h
@@ -134,7 +134,7 @@
 /* Segment-based Error Code - supplemental constants. */
 #define X86_EC_TABLE_MASK (3  << 1)
 #define X86_EC_SEL_SHIFT  3
-#define X86_EC_SEL_MASK   (-1 << X86_EC_SEL_SHIFT)
+#define X86_EC_SEL_MASK   (-1U << X86_EC_SEL_SHIFT)
 #define X86_EC_GDT        0
 #define X86_EC_LDT        X86_EC_TI
 
-- 
2.7.4 (Apple Git-66)


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[PATCH 3/3] xtf: fix usage of "-executable" with find

[Roger Pau Monne]

"-executable" is a GNU only extension to find. Instead replace it with a
POSIX compatible one.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
---
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 7657e19..fd8c3e0 100644
--- a/Makefile
+++ b/Makefile
@@ -22,7 +22,7 @@ cscope:
 .PHONY: clean
 clean:
 	find . \( -name "*.o" -o -name "*.d" -o -name "*.lds" \) -delete
-	find tests/ \( -executable -name "test-*" -o -name "test-*.cfg" \
+	find tests/ \( -perm -a=x -name "test-*" -o -name "test-*.cfg" \
 		-o -name "test-info.json" \) -delete
 
 .PHONY: distclean
-- 
2.7.4 (Apple Git-66)


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Re: [PATCH 0/3] XTF: small fixes

[Andrew Cooper]

On 06/05/16 15:25, Roger Pau Monne wrote:
> Hello,
>
> This is a series of very small fixes for XTF, the first two are code fixes, 
> while the last one is a build system fix.
>
> Thanks, Roger.

1 and 3 look fine - I will take them straight as-is.

2 is slightly more problematic - comment on that patch.

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Re: [PATCH 2/3] xtf: avoid shifting a negative value

[Andrew Cooper]

On 06/05/16 15:25, Roger Pau Monne wrote:
> Because it's undefined behaviour.
>
> Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
> ---
> Cc: Andrew Cooper <andrew.cooper3@citrix.com>
> ---
>  include/arch/x86/processor.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/include/arch/x86/processor.h b/include/arch/x86/processor.h
> index c9f253f..841953c 100644
> --- a/include/arch/x86/processor.h
> +++ b/include/arch/x86/processor.h
> @@ -134,7 +134,7 @@
>  /* Segment-based Error Code - supplemental constants. */
>  #define X86_EC_TABLE_MASK (3  << 1)
>  #define X86_EC_SEL_SHIFT  3
> -#define X86_EC_SEL_MASK   (-1 << X86_EC_SEL_SHIFT)
> +#define X86_EC_SEL_MASK   (-1U << X86_EC_SEL_SHIFT)

The resulting expression needs to be signed, to DTRT when implicitly
promoted.  I presume this was clang complaining?

Does using the constant (-9) work?

~Andrew

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Re: [PATCH 2/3] xtf: avoid shifting a negative value

[Andrew Cooper]

On 06/05/16 15:57, Andrew Cooper wrote:
> On 06/05/16 15:25, Roger Pau Monne wrote:
>> Because it's undefined behaviour.
>>
>> Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
>> ---
>> Cc: Andrew Cooper <andrew.cooper3@citrix.com>
>> ---
>>  include/arch/x86/processor.h | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/include/arch/x86/processor.h b/include/arch/x86/processor.h
>> index c9f253f..841953c 100644
>> --- a/include/arch/x86/processor.h
>> +++ b/include/arch/x86/processor.h
>> @@ -134,7 +134,7 @@
>>  /* Segment-based Error Code - supplemental constants. */
>>  #define X86_EC_TABLE_MASK (3  << 1)
>>  #define X86_EC_SEL_SHIFT  3
>> -#define X86_EC_SEL_MASK   (-1 << X86_EC_SEL_SHIFT)
>> +#define X86_EC_SEL_MASK   (-1U << X86_EC_SEL_SHIFT)
> The resulting expression needs to be signed, to DTRT when implicitly
> promoted.  I presume this was clang complaining?
>
> Does using the constant (-9) work?

Or indeed perhaps ~(1 << X86_EC_SEL_SHIFT) which (iirc) will keep the
signed-ness of 1 even through bitwise inversion.

~Andrew

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