65 lines
2.0 KiB
Plaintext
65 lines
2.0 KiB
Plaintext
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# Kconfig - debug configuration options
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#
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# Copyright (c) 2015 Wind River Systems, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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menu "Safe memory access"
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config MEM_SAFE
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bool
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prompt "Enable safe memory access"
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default n
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help
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Add the routines available in mem_safe.h to the system. This is added as a
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kconfig option instead of simply linking against the library because some
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implementations might require initialization.
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choice
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prompt "Safe memory access implementation"
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default MEM_SAFE_CHECK_BOUNDARIES
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config MEM_SAFE_CHECK_BOUNDARIES
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bool
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prompt "Software validation of memory access within memory regions"
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help
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This implementation checks the application image's text/rodata boundaries
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for its read-only region and the data/bss/noinit boundaries for its
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read-write region, in software.
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Other regions can be added as needed by using the sys_mem_safe_region_add()
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API. The number of regions that can be added is controlled via the
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MEM_SAFE_NUM_REGIONS kconfig option.
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This implementation requires initialization and thus consumes some boot
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time.
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endchoice
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config MEM_SAFE_NUM_EXTRA_REGIONS
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int
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prompt "Number of safe memory access regions that can be added at runtime"
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depends on MEM_SAFE_CHECK_BOUNDARIES
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default 0
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help
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The functions available in mem_safe.h check if memory is within read-only
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or read-write regions before accessing it instead of crashing. The kernel
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image is added as a valid region automatically, but other regions can be
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added if the application makes access to additional memory outside of the
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image's boundaries.
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endmenu
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