efe5f02e41
Having separate linker scripts for all the boards is a bad idea. Most boards really only need to specify MEMORY and the appropriate REGION_ALIASES() so that support/ld/common.inc can do its work. Not having infrastructure for this leads to duplication -- viz. the Maple Mini linker scripts are identical to the Maple's, and the olimex_stm32_h103 linker directory is just a symlink to Maple's. Clearly, the current structure is wrong. To fix it, instead of having per-board subdirectories of support/ld/, add per-MEMORY subdirectories of (new) support/ld/stm32/mem/. The per-board .mk files under support/mk/board-includes/ now reference these directly, and target-config.mk and the Makefile handle this appropriately. We move some other stuff around in target-config.mk to make this all more convenient, and even allow more overriding of the libmaple defaults on a per-board basis. Custom board hacks will be easier now. Unfortunately, lots of duplication under support/ld/stm32/mem/ is necessary, as the LENGTH attribute in a MEMORY region specification doesn't support arithmetic expressions, and ld doesn't seem to have any way to specify MEMORY at the command line (why?!). If we find a better way than this, we should do it. If a board (e.g. Maple Native) _does_ really need special memory-related configuration, you can always put a per-board subdirectory of support/ld/stm32/mem. We do this here to configure the heap. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
27 lines
866 B
Plaintext
27 lines
866 B
Plaintext
/*
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* libmaple linker script for "Flash" builds.
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*
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* A Flash build puts .text (and .rodata) in Flash, and
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* .data/.bss/heap (of course) in SRAM, but offsets the sections by
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* enough space to store the Maple bootloader, which lives in low
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* Flash and uses low memory.
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*/
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/*
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* This pulls in the appropriate MEMORY declaration from the right
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* subdirectory of stm32/mem/ (the environment must call ld with the
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* right include directory flags to make this happen). Boards can also
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* use this file to use any of libmaple's memory-related hooks (like
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* where the heap should live).
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*/
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INCLUDE mem-flash.inc
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/* Provide memory region aliases for common.inc */
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REGION_ALIAS("REGION_TEXT", rom);
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REGION_ALIAS("REGION_DATA", ram);
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REGION_ALIAS("REGION_BSS", ram);
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REGION_ALIAS("REGION_RODATA", rom);
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/* Let common.inc handle the real work. */
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INCLUDE common.inc
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