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Works on real hardware again! #8

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Works on real hardware again! #8

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Commits on Dec 16, 2019

  1. Works on real hardware again! 

    This commit adds various changes to ClashOS to get the stack traces
and bootloader to work again in qemu and on real hardware.

The linker scripts are changed to allow the binary to be linked at the
address 0x80000. This is the default address at which the raspberry pi
will load kernel8.img when no 'config.txt' file is present on the sd card.

To allow stack traces to work, the link register had to be zero'ed, because
it contains random stuff on start up on real hardware. It work on qemu,
because it sets the link register to zero.

The code for the framebuffer is currently comment out, because for some reason
the loading over serial fails to work when that code is compiled. But
loading over serial now works!
    @FireFox317
    FireFox317 committed Dec 16, 2019
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