micropython

[neuschaefer]

• fix crash on arm+linux+musl
  • upstream
  • add -z text to gcc flags on buildroot+musl
• use as experimentation platform
• support for more machine APIs on Linux
  • compare with circuitpython
  • SPI
  • I2C
  • Pin (GPIO)
  • UART

crash

The issue is a .text relocation:

  [12] .text             PROGBITS        00009418 009418 029db8 00  AX  0   0  8
...
 0x00000016 (TEXTREL)                    0x0
...
000095f0  00000017 R_ARM_RELATIVE        

<nsz> this is a pie, textrel can happen if you link non-pic code into a pic binary
<nsz> 000095f0  00000017 R_ARM_RELATIVE
<nsz> that is a relative reloc against something in .text
<nsz> you have to figure out what that is (probably a pointer in literal pool next to a function)

The problematic snippet can simply be replaced by b nlr_push_tail.