libutils: prefix system header guard with 2 underscore chars

Adds prefix "__" to standard header files implemented in libutils. This
is applicable as these header guards macro are system macros. Thi

libutils: prefix system header guard with 2 underscore chars

Adds prefix "__" to standard header files implemented in libutils. This
is applicable as these header guards macro are system macros. This
change prevents conflicts with external component as faced with
SCP-firmware [1] that implements wrapper headers with #include_next for
assert.h and stdlib.h using ASSERT_H [2] and STDLIB_H [3] as header
guards as in libutils.

Prior this change did stdint.h both define STDINT_H and _STDINT_H but
guards only upon STDINT_H. This change removes STDINT_H.

Link: [1] https://github.com/ARM-software/SCP-firmware.git
Link: [2] https://github.com/ARM-software/SCP-firmware/blob/v2.11.0/framework/include/assert.h#L8-L9
Link: [3] https://github.com/ARM-software/SCP-firmware/blob/v2.11.0/framework/include/stdlib.h#L8-L9
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>

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libutils: Import strtoul from newlib

This patch imports strtoul from newlib which the latest version of libfdt
depends on.

Some modification of the original source is required to do this,
specifica

libutils: Import strtoul from newlib

This patch imports strtoul from newlib which the latest version of libfdt
depends on.

Some modification of the original source is required to do this,
specifically:

This is an import of the newlib 1.19.0 version of strtoul dropping

- Headers and prototypes for re-entrancy

- Any reliance on errno

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>

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Add rand() for TA usage

Adds rand() by declaring it in stdlib.h where it's expected to be found.
Implementation is provided in libutee since it depends on
TEE_GenerateRandom().

Reviewed-by: Joakim

Add rand() for TA usage

Adds rand() by declaring it in stdlib.h where it's expected to be found.
Implementation is provided in libutee since it depends on
TEE_GenerateRandom().

Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

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Remove license notice from STMicroelectronics files

Since a while the source files license info are defined by SPDX
identifiers. We can safely remove the verbose license text from the
files that are

Remove license notice from STMicroelectronics files

Since a while the source files license info are defined by SPDX
identifiers. We can safely remove the verbose license text from the
files that are owned by either only STMicroelectronics or only both
Linaro and STMicroelectronics.

Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>

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Add SPDX license identifiers

Adds one SPDX-License-Identifier line [1] to each source files that
contains license text.

Generated by [2]:
spdxify.py --add-spdx optee_os/

The scancode tool [3] wa

Add SPDX license identifiers

Adds one SPDX-License-Identifier line [1] to each source files that
contains license text.

Generated by [2]:
spdxify.py --add-spdx optee_os/

The scancode tool [3] was used to double check the license matching
code in the Python script. All the licenses detected by scancode are
either detected by spdxify.py, or have no SPDX identifier, or are false
matches.

Link: [1] https://spdx.org/licenses/
Link: [2] https://github.com/jforissier/misc/blob/f7b56c8/spdxify.py
Link: [3] https://github.com/nexB/scancode-toolkit
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Joakim Bech <joakim.bech@linaro.org>

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libutils: add abs()

Imports abs() from newlib.

Reviewed-by: Pascal Brand <pascal.brand@linaro.org>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Tested-by: Jerome Forissier <jerome.fo

libutils: add abs()

Imports abs() from newlib.

Reviewed-by: Pascal Brand <pascal.brand@linaro.org>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Tested-by: Jerome Forissier <jerome.forissier@linaro.org> (HiKey)
Tested-by: Jens Wiklander <jens.wiklander@linaro.org> (QEMU, FVP Aarch64)
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

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libutils: move abort declaration to stdlib.h

Reviewed-by: Pascal Brand <pascal.brand@linaro.org>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Signed-off-by: Jens Wiklander <jens.wikla

libutils: move abort declaration to stdlib.h

Reviewed-by: Pascal Brand <pascal.brand@linaro.org>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

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Open-source the TEE Core

Signed-off-by: Pascal Brand <pascal.brand@st.com>