The N/A (alignment) entry allows you to quickly see if any bytes are lost due to alignment restrictions.Īll product names are trademarks or registered trademarks of their respective owners. With falling alignment order the result is: The reason is that allocating segments in falling alignment order doesn’t generate byte 'spill'. Reverse the order of 'A,B,C' in the placement command to 'C,B,A'. The module summary list 3 bytes as N/A (alignment) in this case. Segment C is placed on 0x2C-0圆B (2 bytes, 0x2A and 0x2B, are lost due to alignment) As we have seen in the last tutorial on the bare metal embedded system build process using GNU tools, the linker role is to combine multiple object files and produce a single executable file.But in embedded systems, the linking process involves two steps: one is the linker and the second step is the locator.Segment B is placed on 0x20-0x29 (1 byte, 0x1F, is lost due to alignment).Segment C has a size of 0x40 bytes and an alignment of 2 (4-byte aligned).Segment B has a size of 0xA bytes and an alignment of 1 (2-byte aligned).Segment A has a size of 0x1F bytes and an alignment of 0 (1-byte aligned).Placement command example for the IAR XLINK Linker: -Z(DATA)A,B,C=0-FFFF Assumption ioCCxx10.h C:Program FilesIAR SystemsEmbedded Workbench 4. lnk51ewccxx10.x cl C:Program FilesIAR SystemsEmbedded Workbench 4.058051config Set up the linker to reflect CCxx10. The 'N/A (alignment)' entry shows bytes lost due to alignment restrictions on segments. CCxx10.ddf C:Program FilesIAR SystemsEmbedded Workbench 4.058051configderivativeschipcon Describe each register used in the debugger. of embedded applications Flexible segment commands allow detailed control of. Read this technical note to understand why the IAR XLINK Linker™ generates the 'N/A (alignment)' entry in the map file. IAR Embedded Workbench for 8051 Version 7.30A 1 Highlights in version 7.30.
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