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| /* | |
| * LINKER SCRIPT | |
| * | |
| * The Linker Script defines how the code and data emitted by the GNU C compiler | |
| * and assembler are to be loaded into memory (code goes into ROM, variables | |
| * go into RAM). | |
| * | |
| * Any symbols defined in the Linker Script are automatically global and | |
| * available to the rest of the program. | |
| * | |
| * Example for STM32F401: | |
| * | |
| * MEMORY MAP (RAM) | |
| * | |
| * | | 0x2001 0000 <---- __ram_end, __heap_end | |
| * |---------------------------------| 0x2000 FFFF | |
| * | Unused RAM | | |
| * | (overwritten by heap!) | | |
| * |---------------------------------| | |
| * | ^ | | |
| * | | | | |
| * | Heap Area | | |
| * | (grows upwards) | <------- __heap_start | |
| * +-------> |---------------------------------| <------- __noinit_end | |
| * | | | | |
| * .noinit | Global data not cleared | | |
| * | | after reset | <------- __noinit_start | |
| * +-------> |---------------------------------| <------- __bss_end | |
| * | | | | |
| * .bss | uninitialized variables | | |
| * | | | <------- __bss_start | |
| * +-------> |---------------------------------| <------- __data_end | |
| * | | | | |
| * | | | | |
| * .data | initialized variables | | |
| * | | (contains .fastdata) | | |
| * | | | <------- __data_start, __fastdata_start, __fastdata_end | |
| * +-------> |---------------------------------| <------- __vector_table_ram_end | |
| * | | | | |
| * .vectors | Interrupt Vectors (in RAM) | | |
| * | | (if re-mapped) | <------- __vector_table_ram_start | |
| * +-------> |---------------------------------| <------- __process_stack_top, __stack_end | |
| * | Process Stack (psp) | | |
| * | (grows downwards) | | |
| * | | | | |
| * | v | | |
| * |---------------------------------| <------- __main_stack_top | |
| * | Main Stack (msp) | | |
| * | (grows downwards) | | |
| * | | | | |
| * | v | <------- __stack_start | |
| * |---------------------------------| | |
| * | Alignment buffer for .vectors | | |
| * | (overwritten by stack!) | | |
| * |---------------------------------| 0x2000 0000 <--- __ram_start | |
| * | |
| * | |
| * MEMORY MAP (Flash) | |
| * | |
| * | | 0x0802 0000 | |
| * +-------> |---------------------------------| 0x0801 FFFF <--- __flash_end, __persistent_end | |
| * | | | | |
| * | | | | |
| * .persistent | Persistent Storage | | |
| * | | | | |
| * | | | | |
| * +-------> |---------------------------------| <------- __persistent_start | |
| * | Unused flash | start at the beginning | |
| * | (alignment buffer) | of the next flash page | |
| * +-------> |---------------------------------| | |
| * | | | | |
| * | | | | |
| * | | | | |
| * .data | copy of .data area | | |
| * | | | | |
| * | | | | |
| * | | | <------- __data_load, __fastdata_load | |
| * +-------> |---------------------------------| | |
| * | | Static Constructors (C++) | | |
| * | | ------------------------------- | | |
| * | | | | |
| * .text | | | |
| * | | C/C++ code | | |
| * | | (contains .fastcode) | | |
| * | | | <------- __fastcode_load, __fastcode_start, __fastcode_end | |
| * +-------> |---------------------------------| | |
| * | | | | |
| * .reset | Interrupt Vectors (in ROM) | <------- __vector_table_ram_load | |
| * | | (copy of .vectors) | <------- __vector_table_rom_start | |
| * +-------> |---------------------------------| 0x0800 0000 <--- __flash_start | |
| * | |
| * The first two words (32-bit) in the Flash defines the initial stack pointer | |
| * location and the reset handler location. | |
| */ |
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