mjb/altos/src/stm/altos-loader.ld, branch debian/1.8.5-1

altos/stm: Align 'data' to 8 bytes, just like textram

2017-12-12T23:31:27+00:00

The textram section must be aligned to 8 bytes to keep the linker happy. However, if that section contains no data, the declaration will set the __data_start__ value to that alignment, but the data section itself would start on a 4-byte alignment, potentially 4 bytes lower than the value indicated by __data_start__. This completely scrambles initialized memory as the startup code will copy the data segment to __data_start__, 4 bytes off of the actual data segment start. Fix this by forcing the data segment to also be aligned to 8 bytes. Signed-off-by: Keith Packard

Switch from GPLv2 to GPLv2+

2016-07-12T22:41:41+00:00

Signed-off-by: Keith Packard

altos/stm: arm-none-eabi-binutils now puts 'main' into .text.startup

2013-12-09T03:37:53+00:00

Change name of .text.ram to .ramtext, then load .text* into flash and .ramtext into ram. This ensures that 'main' and anything else in a random .text.* segment will get loaded into flash as appropriate. Signed-off-by: Keith Packard

altos/stm: Create per-product flash loaders

2013-05-08T04:30:27+00:00

Split the flash loader prototype into pieces so that each product can build a custom flash loader with very little code. Signed-off-by: Keith Packard

altos: Get rodata into flash, make sure sections are aligned

2013-05-08T04:30:26+00:00

.rodata* needs to be in flash; otherwise strings get left in ram. Failing to align sections makes the initialized data get dumped into the wrong place in memory. Signed-off-by: Keith Packard

altos/stm: Shrink stm flash loader to < 4kB

2013-05-08T04:30:26+00:00

Saves 4kB of flash space for applications. Signed-off-by: Keith Packard

altos/stm: Add comments to the .ld files explaining how the romconfig stuff works

2013-05-08T03:16:52+00:00

Would be nice to be able to explicitly define addresses for the romconfig variables, but I can't figure out how to make that work. Instead, just explicitly load the files in teh right order to make things land in the right places. Signed-off-by: Keith Packard

altos: Mark .boot section as (NOLOAD)

2013-05-08T03:16:52+00:00

For some reason, the silly linker marks things in section .boot as data rather than bss, so they'd end up initialized by default. Force them to be NOLOAD so they preserve values across reboot so that boot chaining works properly. Signed-off-by: Keith Packard

altos: Clean up boot loader support

2013-05-08T03:16:36+00:00

Split out code into separate files. Add support for getting back to boot loader from application. Signed-off-by: Keith Packard

altos: Add program flash function

2013-05-08T03:15:45+00:00

And get it loaded to RAM so it can execute correctly. Nothing calls it yet... Signed-off-by: Keith Packard