How to change start address in armgcc

[George555]

I'm trying to figure out how to change the start address of my application when chip has a bootloader flashed on it.

For example :

Bootloader address = 0x0

Main application = 0x01000

Do I have to add any flags on the makefile without modifying the linker script?

[Jørgen Holmefjord]

Hi,

The bootloader is normally placed at the top of the flash, it is the MBR that is placed at the bottom, see Memory layout.

Why do you not want to modify the linker script? There is a separate linker script in each project directory, so it will not affect other projects if you modify it. I'm not aware of any ways to move the flash start address without modifying the linker script.

Best regards,
Jørgen

[George555]

I'm planning on making my own bootloader. I didn't find any other way without modifying the linker script.

There's a parameter in Segger Embedded Studio FLASH_START=0x0 which allows you to build and place the application starting at different address than 0x0.

I guess modifying the linker script can give you the expected results but I was looking for a faster method maybe a parameter into the linker.

[Jørgen Holmefjord]

Segger Embedded Studio uses the FLASH_START config to generate a linker script automatically. You can see the full linker-script in "Output\[project_name] [build_config_name]\Obj\[project_name].ld" from the ses project directory.