Linker Options - 2021.2 English

Vitis Unified Software Platform Documentation: Embedded Software Development (UG1400)

Document ID
Release Date
2021.2 English
-defsym _STACK_SIZE=value
The total memory allocated for the stack can be modified using this linker option. The variable _STACK_SIZE is the total space allocated for the stack. The _STACK_SIZE variable is given the default value of 100 words, or 400 bytes. If your program is expected to need more than 400 bytes for stack and heap combined, it is recommended that you increase the value of _STACK_SIZE using this option. The value is in bytes.

In certain cases, a program might need a bigger stack. If the stack size required by the program is greater than the stack size available, the program tries to write in other, incorrect, sections of the program, leading to incorrect execution of the code.

Note: A minimum stack size of 16 bytes (0x0010) is required for programs linked with the Xilinx-provided C runtime (CRT) files.
-defsym _HEAP_SIZE=value
The total memory allocated for the heap can be controlled by the value given to the variable _HEAP_SIZE. The default value of _HEAP_SIZE is zero.

Dynamic memory allocation routines use the heap. If your program uses the heap in this fashion, then you must provide a reasonable value for _HEAP_SIZE.

For advanced users: you can generate linker scripts directly from IP integrator.