eal/x86: fix unaligned access for small memcpy

Calls to rte_memcpy for 1 < n < 16 could result in unaligned
loads/stores, which is undefined behaviour according to the C
standard, and strict aliasin

eal/x86: fix unaligned access for small memcpy

Calls to rte_memcpy for 1 < n < 16 could result in unaligned
loads/stores, which is undefined behaviour according to the C
standard, and strict aliasing violations.

The code was changed to use a packed structure that allows aliasing
(using the __may_alias__ attribute) to perform the load/store
operations. This results in code that has the same performance as the
original code and that is also C standards-compliant.

Fixes: af75078fece3 ("first public release")
Cc: [email protected]

Signed-off-by: Luc Pelletier <[email protected]>
Acked-by: Konstantin Ananyev <[email protected]>
Tested-by: Konstantin Ananyev <[email protected]>

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test/mem: disable ASan when accessing unallocated memory

As described in bugzilla, ASan reports accesses to all memory segment as
invalid, since those parts have not been allocated with rte_malloc.

test/mem: disable ASan when accessing unallocated memory

As described in bugzilla, ASan reports accesses to all memory segment as
invalid, since those parts have not been allocated with rte_malloc.
Move __rte_no_asan to rte_common.h and disable ASan on a part of the test.

Bugzilla ID: 880
Fixes: 6cc51b1293ce ("mem: instrument allocator for ASan")
Cc: [email protected]

Signed-off-by: David Marchand <[email protected]>
Acked-by: Anatoly Burakov <[email protected]>

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eal: add macro to warn for unused function return values

This patch adds a wrapper macro __rte_warn_unused_result for the
warn_unused_result function attribute.

Marking a function __rte_warn_unused

eal: add macro to warn for unused function return values

This patch adds a wrapper macro __rte_warn_unused_result for the
warn_unused_result function attribute.

Marking a function __rte_warn_unused_result will make the compiler
emit a warning in case the caller does not use the function's return
value.

Signed-off-by: Mattias Rönnblom <[email protected]>
Acked-by: Bruce Richardson <[email protected]>
Reviewed-by: Morten Brørup <[email protected]>
Acked-by: Tyler Retzlaff <[email protected]>

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eal: add macro to swap two variables

Add a macro to swap two variables
and updat common autotest for the same.

Signed-off-by: Shijith Thotton <[email protected]>
Acked-by: Jerin Jacob <jerinj@ma

eal: add macro to swap two variables

Add a macro to swap two variables
and updat common autotest for the same.

Signed-off-by: Shijith Thotton <[email protected]>
Acked-by: Jerin Jacob <[email protected]>

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eal: fix argument in 32-bit safe BSF function

The first argument to rte_bsf32_safe was incorrectly declared as
a 64 bit value. The code only works on 32 bit values and the underlying
function rte_bs

eal: fix argument in 32-bit safe BSF function

The first argument to rte_bsf32_safe was incorrectly declared as
a 64 bit value. The code only works on 32 bit values and the underlying
function rte_bsf32 only accepts 32 bit values. This was a mistake
introduced when the safe version was added and probably cause
by copy/paste from the 64 bit version.

The bug passed silently under the radar until some other code was
built with -Wall and -Wextra in C++ and C++ complains about the
missing cast.

Yes, this is a API signature change, but the original code was wrong.
It is an inline so not an ABI change.

Fixes: 4e261f551986 ("eal: add 64-bit bsf and 32-bit safe bsf functions")
Cc: [email protected]

Signed-off-by: Stephen Hemminger <[email protected]>
Acked-by: Tyler Retzlaff <[email protected]>

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lib: remove librte_ prefix from directory names

There is no reason for the DPDK libraries to all have 'librte_' prefix on
the directory names. This prefix makes the directory names longer and also
m

lib: remove librte_ prefix from directory names

There is no reason for the DPDK libraries to all have 'librte_' prefix on
the directory names. This prefix makes the directory names longer and also
makes it awkward to add features referring to individual libraries in the
build - should the lib names be specified with or without the prefix.
Therefore, we can just remove the library prefix and use the library's
unique name as the directory name, i.e. 'eal' rather than 'librte_eal'

Signed-off-by: Bruce Richardson <[email protected]>

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