ed85b76093
The error message is obscure when CONFIG_PRIVILEGED_STACK_TEXT_AREA is
configured incorrectly. It looks like this:
zephyr/linker.cmd:73 cannot move location counter backwards (from
0000000000069bfc to 0000000000069bd8)
This patch re-writes the linker script mechanism in a (believed and
tested) semantically equivalent way such that it is possible to use an
assertion.
The assertion's error message now looks like this:
Memory region Used Size Region Size %age Used
FLASH: 503012 B 1 MB 47.97%
SRAM: 53760 B 256 KB 20.51%
IDT_LIST: 120 B 2 KB 5.86
real-ld: The configuration system has incorrectly set
'CONFIG_PRIVILEGED_STACK_TEXT_AREA' to
128, which is not big enough. You must
through Kconfig either disable 'CONFIG_USERSPACE', or set
'CONFIG_PRIVILEGED_STACK_TEXT_AREA' to a value larger than
128 .
collect2: error: ld returned 1 exit status
Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
39 lines
1.3 KiB
Plaintext
39 lines
1.3 KiB
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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#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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_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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_priv_stacks_text_area_used = _priv_stacks_text_area_end - _priv_stacks_text_area_start;
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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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/* In a valid build the MAX function will always evaluate to the
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second argument below, but to give the user a good error message
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when the area overflows we need to temporarily corrupt the
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location counter, and then detect the overflow with an assertion
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later on. */
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. = MAX(., _priv_stacks_text_area_start + CONFIG_PRIVILEGED_STACK_TEXT_AREA);
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ASSERT(
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CONFIG_PRIVILEGED_STACK_TEXT_AREA >= _priv_stacks_text_area_used,
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"The configuration system has incorrectly set
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'CONFIG_PRIVILEGED_STACK_TEXT_AREA' to
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CONFIG_PRIVILEGED_STACK_TEXT_AREA, which is not big enough. You must
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through Kconfig either disable 'CONFIG_USERSPACE', or set
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'CONFIG_PRIVILEGED_STACK_TEXT_AREA' to a value larger than
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CONFIG_PRIVILEGED_STACK_TEXT_AREA."
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);
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#endif /* CONFIG_USERSPACE */
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