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Signed-off-by: Michael Hope <michaelh@juju.net.nz>
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Rename HEAP_START/HEAP_END macros CONFIG_HEAP_START/CONFIG_HEAP_END,
to mark them as build-time configuration options. Wrap their
definitions with #ifndefs appropriately.
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- common_header.inc: Declare EXTERN symbols _lm_heap_start and
_lm_heap_end.
- common_rom.inc: Check for _lm_heap_start and _lm_heap_end. If they
are defined, preserve their values. Otherwise, _lm_heap_start is
starts after .bss, and _lm_heap_end is the end of SRAM.
This allows existing linker scripts to continue using the old heap
scheme, but allows for customizability elsewhere.
- syscalls.c: Respect the addresses of _lm_heap_start and _lm_heap_end
as the boundaries of the heap in _sbrk().
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Fix _sbrk() implementation so it properly rejects negative arguments
which would send the program break below the heap start. Fix
incorrect check against argument causing heap overflow. Also set
errno properly to ENOMEM when the call fails.
Beginning and end of the heap are now determined by HEAP_START and
HEAP_END macros. Their current values seem to work OK for heaps on
the internal SRAM, but they'll need to get generalized for Maple
Native.
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uart_send() is not part of libmaple, and nm doesn't show it getting
linked in from anywhere else, so I don't believe it exists. Remove it.
Also remove some commented-out sections from getch(), putch(),
_write(), and fgets(). These either reference uart_send() or use old
libmaple APIs which no longer exist.
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Go through overlong source code lines and convert as many of them as
appropriate to be 80-column clean. This mostly affects license
headers. Overlong lines are determined by running following from the
libmaple base directory:
$ ack-grep --nocolor --nogroup --cpp --cc --ignore-dir=usb -- '.{80}'
Note that this excludes libmaple's usb subdirectory, which is still
full of ST code that doesn't follow the libmaple source code
guidelines.
Contents of ~/.ackrc (these won't matter, but are included for
completeness):
--ignore-dir=docs
--ignore-dir=build
--type-set
ld=.ld
--type-set
rst=.rst
--type-set
txt=.txt
--type-set
mk=.mk
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Relicensed the bulk of libmaple under the more permissive MIT License,
from GPLv3. Files that were largely or entirely derived from
the Arduino, STM, or Lanchon retain their original licenses.
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copy-to-ide and Makefile updated to conform; .gitignore added;
LICENSE added
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