mirror of
https://github.com/zephyrproject-rtos/zephyr
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18560a01a4
This patch adds the generation and incorporation of privileged stack regions that are used by ARM user mode threads. This patch adds the infrastructure for privileged stacks. Later patches will utilize the generated stacks and helper functions. Signed-off-by: Chunlin Han <chunlin.han@linaro.org> Signed-off-by: Andy Gross <andy.gross@linaro.org>
31 lines
870 B
Plaintext
31 lines
870 B
Plaintext
/*
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* Copyright (c) 2017 Linaro Limited.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef PRIV_STACKS_TEXT_AREA
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#if defined(CONFIG_DEBUG) || defined(CONFIG_STACK_CANARIES)
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#define PRIV_STACKS_TEXT_AREA 256
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#else
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#define PRIV_STACKS_TEXT_AREA 128
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#endif
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#endif
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#ifdef CONFIG_USERSPACE
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/* We need to reserve room for the gperf generated hash functions.
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* Fortunately, unlike the data tables, the size of the code is
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* reasonably predictable.
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*
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* The linker will error out complaining that the location pointer
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* is moving backwards if the reserved room isn't large enough.
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*/
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_priv_stacks_text_area_start = .;
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*(".priv_stacks.text*")
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_priv_stacks_text_area_end = .;
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#ifndef LINKER_PASS2
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PROVIDE(_k_priv_stack_find = .);
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#endif
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. += PRIV_STACKS_TEXT_AREA - (_priv_stacks_text_area_end - _priv_stacks_text_area_start);
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#endif /* CONFIG_USERSPACE */
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