32l_lcd example, GCC ICE, __attribute__((naked))

[stlink-org]

32l_lcd example, GCC ICE, __attribute__((naked))

[rogerdahl]

After writing the above, I noticed the setup_stack() function at the start of main(), which sets the stack up to the end of the SRAM area. I presume that it intended to compensate for attribute((naked)) in the definition of main(). So, then I guess the ICE in GCC occurs because GCC can't use a stack that has been set up manually?

I've had some partial success getting things to compile by creating a new main function that contains attribute((naked)) and attribute((used)) in the definition, and which only sets up the stack and calls out to another function that contains everything main used to contain. The idea being that the single call might be safe, and that the new function being called gets the regular prologue, epilogue and stack frame. This compiles, and partially works. I get it to flash the LEDs, but the program crashes when I introduce a call to LCD_GLASS_DisplayString().

LCD_GLASS_Init() and LCD_GLASS_Clear() do not crash.

[rogerdahl]

It looks like the crash happens when stm32l_discovery_lcd.c calls out to LCD_UpdateDisplayRequest() in stm32l1xx_lcd.c.

[Nightwalker-87]

Review: Does not seem to be related to the stlink-project.