arch: add big endian support
This patch adds Big Endian architecture support. Even if a compiler generating big endian object files is used, our linker script, or include/linker/linker-tool-gcc.h to be precise, has default output format as little endian. This patch adds a hidden config CONFIG_BIG_ENDIAN, which should be set by big endian architectures or a SoC's, and adds an condition to switch OUTPUT_FORMAT in our linker.cmd. Signed-off-by: Yasushi SHOJI <y-shoji@ispace-inc.com>
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3 changed files with 18 additions and 1 deletions
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@ -772,6 +772,7 @@ if(CONFIG_GEN_ISR_TABLES)
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--output-source isr_tables.c
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--kernel $<TARGET_FILE:zephyr_prebuilt>
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--intlist isrList.bin
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$<$<BOOL:${CONFIG_BIG_ENDIAN}>:--big-endian>
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$<$<BOOL:${CMAKE_VERBOSE_MAKEFILE}>:--debug>
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${GEN_ISR_TABLE_EXTRA_ARG}
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DEPENDS zephyr_prebuilt
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11
arch/Kconfig
11
arch/Kconfig
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@ -61,6 +61,17 @@ module = MPU
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module-str = mpu
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source "subsys/logging/Kconfig.template.log_config"
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config BIG_ENDIAN
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bool
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help
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This option tells the build system that the target system is
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big-endian. Little-endian architecture is the default and
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should leave this option unselected. This option is selected
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by arch/$ARCH/Kconfig, soc/**/Kconfig, or boards/**/Kconfig
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and the user should generally avoid modifying it. The option
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is used to select linker script OUTPUT_FORMAT and command
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line option for gen_isr_tables.py.
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config HW_STACK_PROTECTION
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bool "Hardware Stack Protection"
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depends on ARCH_HAS_STACK_PROTECTION
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@ -16,7 +16,12 @@
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#define ZEPHYR_INCLUDE_LINKER_LINKER_TOOL_GCC_H_
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#if defined(CONFIG_ARM)
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OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
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#if defined(CONFIG_BIG_ENDIAN)
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#define OUTPUT_FORMAT_ "elf32-bigarm"
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#else
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#define OUTPUT_FORMAT_ "elf32-littlearm"
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#endif
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OUTPUT_FORMAT(OUTPUT_FORMAT_)
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#elif defined(CONFIG_ARC)
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OUTPUT_FORMAT("elf32-littlearc", "elf32-bigarc", "elf32-littlearc")
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#elif defined(CONFIG_X86)
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