[linux-morello-ltp] Re: [PATCH v4] README: Update build instructions

On 30/11/2022 13:13, Beata Michalska wrote:

Clean-up the instructions for building LTP syscall testcases, as those have become bit stale. Also add some additional details on the required setup.

Signed-off-by: Beata Michalska beata.michalska@arm.com

changes available at: https://git.morello-project.org/Bea/morello-linux-ltp/-/tree/morello/readme_...

v4:

• re-fitting the 'Building' section title into one line
• re-phrasing the description for OUTPUT_DIR and renaming that one into LTP_INSTALL

v3:

• switching to 'plain aarch64' instead using aarch64

v2:

• increasing readability (hopefully)
• added info on aarch64 build
• dropped -pthread option as this one is not required when building with Musl (@thanks to Yury)

README.rst | 75 ++++++++++++++++++++++++++++++++++++------------------ 1 file changed, 50 insertions(+), 25 deletions(-)

Looks good to me!

Kevin

diff --git a/README.rst b/README.rst index 342901f4d..4aebadd35 100644 --- a/README.rst +++ b/README.rst @@ -18,8 +18,8 @@ https://op-lists.linaro.org/mailman3/lists/linux-morello-ltp.op-lists.linaro... pure-capability kernel-user ABI (PCuABI) (see `Morello Linux ABI specifications https://git.morello-project.org/morello/kernel/linux/-/wikis/home`_)

-Building (cross-compiling) & running relevant tests (purecap mode)

+Building & running relevant tests (purecap and plain aarch64 mode) +------------------------------------------------------------------ Dependencies/requirements: (additional to what's required to build base LTP): @@ -29,7 +29,7 @@ Dependencies/requirements: (additional to what's required to build base LTP): Binary releases: https://git.morello-project.org/morello/llvm-project-releases

• • **morello/baremetal-release-1.4** + **morello/linux-aarch64-release-1.4** for Morello

• • **morello/baremetal-release-1.x*** + **morello/linux-aarch64-release-1.x*** for Morello purecap crt objects

@@ -37,6 +37,8 @@ Dependencies/requirements: (additional to what's required to build base LTP):

• Kernel uAPI header files: https://git.morello-project.org/morello/morello-linux-headers

+* All based on the same release/tag version.

Building Musl:

@@ -44,16 +46,27 @@ Assumptions: .. code-block::

• clang - Morello Clang (see Dependencies) configured for current environment

• clang - Morello Clang (see Dependencies) configured for current environment

+.. code-block::

• TRIPLE - Target architecture:

•                            - morello+c64 (purecap): aarch64-linux-musl_purecap
  

•                            - plain aarch64:         aarch64-linux-gnu
  

• MORELLO_SUPPORT - Enabling support for Morello

•                            - morello+c64 (purecap): --enable-morello
  

•                            - plain aarch64:         --disable-morello
  

.. code-block:: CC=clang ./configure \ --disable-shared \

• --enable-morello \

• ${MORELLO_SUPPORT} \ --disable-libshim \

• --target=aarch64-linux-musl_purecap \

• --target=${TRIPLE} \ --prefix=${INSTALL_PATH}

@@ -72,27 +85,31 @@ Assumptions: .. code-block:: clang - Morello Clang (see Dependencies) configured for current environment

• KHDR_DIR - kernel uAPI headers
• MUSL - Musl build (see above)
• MORELLO_CRT_OBJS - as per https://git.morello-project.org/morello/llvm-project-releases/-/tree/morello...

•                   -> $(clang -print-resource-dir)/lib/aarch64-unknown-linux-musl_purecap
  

• TRIPLE - target architecture:

•                            - morello+c64 (purecap): aarch64-linux-musl_purecap
  

•                            - plain aarch64:         aarch64-linux-gnu
  

•                   (needs to match *TRIPLE* specified for Musl build)
  

• KHDR_DIR - kernel uAPI headers (see Dependencies or alternatively headers

•                   installed for Morello Linux kernel through make headers_install)
  

• MUSL - installed Musl libc for Morello (see section above: `Building Musl`);

•                   this will serve as a location for --sysroot option
  

•                   (note this must match chosen configuration - see
  

•                   *TRIPLE* & *MORELLO_SUPPORT* in `Building Musl`)
  

• LTP_BUILD - out-of-tree build path (created by LTP's build.sh script if needed)
• LTP_INSTALL - destination path where LTP tests are to be installed
• TARGETS - build targets, currently only pan and testcases/kernel/syscalls

•                   are supported, it can be further narrowed down for specific syscall
  

•                   testcases:
  

•                   TARGETS="pan testcases/kernel/syscalls/${syscall}"
  

• TARGET_FEATURE - morello+c64 (purecap) only: -march=morello+c64

.. code-block::

• CLANG_RES_DIR=$(clang -print-resource-dir)

• CFLAGS="--target=${TRIPLE} ${TARGET_FEATURE} --sysroot=${MUSL} \

•        -isystem ${KHDR_DIR}/usr/include -g -Wall"
  

• CFLAGS_COMMON="--target=aarch64-linux-gnu -integrated-as -g -static -nostdinc -pthread \
• -isystem $KHDR_DIR/usr/include"
• CFLAGS_PURECAP="$CFLAGS_COMMON -march=morello+c64 -mabi=purecap \
• -isystem $CLANG_RES_DIR/include -isystem $MUSL/include -Wall"
• LDFLAGS_COMMON="--target=aarch64-linux-gnu -fuse-ld=lld -static -nostdlib"
• LDFLAGS_PURECAP="$LDFLAGS_COMMON $MUSL/lib/crt1.o $MUSL/lib/crti.o \
• $MORELLO_CRT_OBJS/clang_rt.crt|Clean-up the instructions for building LTP syscall testcases, as

those have become bit stale. Also add some additional details on the required setup. Signed-off-by: Beata Michalska beata.michalska@arm.com --- changes available at: https://git.morello-project.org/Bea/morello-linux-ltp/-/tree/morello/readme_... v4: - re-fitting the 'Building' section title into one line - re-phrasing the description for OUTPUT_DIR and renaming that one into LTP_INSTALL v3: - switching to 'plain aarch64' instead using aarch64 v2: - increasing readability (hopefully) - added info on aarch64 build

• dropped -pthread option as this one is not required when building

with Musl (@thanks to Yury) README.rst | 75 ++++++++++++++++++++++++++++++++++++------------------ 1 file changed, 50 insertions(+), 25 deletions(-) diff --git a/README.rst b/README.rst index 342901f4d..4aebadd35 100644 --- a/README.rst +++ b/README.rst @@ -18,8 +18,8 @@ https://op-lists.linaro.org/mailman3/lists/linux-morello-ltp.op-lists.linaro... pure-capability kernel-user ABI (PCuABI) (see `Morello Linux ABI specifications https://git.morello-project.org/morello/kernel/linux/-/wikis/home`_) -Building (cross-compiling) & running relevant tests (purecap mode) -----------------|begin.o $MORELLO_CRT_OBJS/libclang_rt.builtins.a \

• $MORELLO_CRT_OBJS/clang_rt.crtend.o $MUSL/lib/crtn.o -L$MUSL/lib/ -lc -L$LTP_BUILD/lib"

• LDFLAGS="--target=${TRIPLE} -rtlib=compiler-rt --sysroot=${MUSL} \

•         -fuse-ld=lld -static -L${LTP_BUILD}/lib"
  

export CC=clang export HOST_CFLAGS="-O2 -Wall" @@ -101,9 +118,17 @@ Assumptions: MAKE_OPTS="TST_NEWER_64_SYSCALL=no TST_COMPAT_16_SYSCALL=no" \ TARGETS="pan testcases/kernel/syscalls" BUILD_DIR="$LTP_BUILD" \

• CFLAGS="$CFLAGS_PURECAP" LDFLAGS="$LDFLAGS_PURECAP" \
• ./build.sh -t cross -o out -ip "${OUTPUT_DIR}/opt/ltp"

• CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" \
• ./build.sh -t cross -o out -ip "${LTP_INSTALL}"

+This can be split into separate steps for ``configure``, ``build`` and ``install`` by +specifying additional parameter to ``build.sh`` detailing each step:

+.. code-block::

•    -r configure   - run configure only
  

•    -r build       - run build only
  

•    -r install     - run install only
  

Running tests:

---