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• webinar by IAR on 13 Jan 2022

• https://www.iar.com/about/news-and-events/the-weekly-breakpoint-blog/all-you-need-to-know-about-position-independent-code-pic-and-data-pid/

• attended by

  • Thomas Watteyne

• replay

  • Thomas Watteyne will add once received

Notes

• can apply to read-only (ROPI) or read-write (RWPI)

• use cases

  • protocol stack as as use case for PIC and PID

    • discusses specifically Nordic’s SoftDevice

  • data sets: we load the data at some address, a bit like a filesystem

  • program loader

    • discussion source level debugging of both images (bootloader and application)

• other webinars on bootloader, ask fae@iar.com

• IAR allows you to load multiple images

  • either binary file, in which case you manually specify offset

  • or ELF file, which already contains the offset

• using possible independent allows loading of two apps without copying code over

• examples though tech notes: https://www.iar.com/knowledge/support/technical-notes/compiler/ewarm-position-independent-code-and-data-ropi-and-rwpi-ewarm-5.50/

• https://www.iar.com/academy is a great way of learning IAR

• icf file uses exported symbol so application can use it (compiler and linker pull it at compile time)

• additional webinars (replays) on bootloaders

  • https://register.gotowebinar.com/rt/1801805308118437134, https://www.iar.com/about/news-and-events/the-weekly-breakpoint-blog/how-to-secure-your-application-using-a-serial-loader-and-secure-boot-manager/

  • https://register.gotowebinar.com/rt/1600754104066873611

Slides