How do I place library functions in a specific location?

Introduction

When IAR ILINK Linker links the output, the linked sections and blocks, including library functions, will be in arbitrary order. (This is so by design).

Solution

The linker directive "define block", complemented with a "fixed order" parameter, can be used to group for example DLIB functions using "section selectors" with the keyword "object".

For more information, see the chapter Section-selectors in the Development Guide.

Example

This example will group library functions in a specified order and place them last in the ROM region.

With the following lines added to the .icf file ...

define block LIB_CODE with fixed order
{
 readonly object xreportassert.o,
 readonly object iarttio.o,
 readonly object ABImemcpy.o,
 readonly object cmain.o
};

place in ROM_region { readonly, last block LIB_CODE };

... the .map file will show something like ...

LIB_CODE                    0x0800cd98   0x192  <Block>
  .text             ro code  0x0800cd98    0xa0  xreportassert.o [3]
  .text             ro code  0x0800ce38    0x6c  iarttio.o [6]
  .text             ro code  0x0800cea4    0x70  ABImemcpy.o [5]
  .text             ro code  0x0800cf14    0x16  cmain.o [5]

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