[Backport v4.1-branch] arch: arm: cortex_m: Force literal pool placement in inline asm block #92827
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When LTO is enabled, linker may relocate literal pools out of Thumb LDR instruction's reach causing "offset out of range" errors while linking. This commit adds `.ltorg` directive in the inline asm blocks where absolute addresses are loaded using the `ldr` instructions, in order to ensure that the literal pool containing the absolute addresses are placed near the `ldr` instructions. Note that the `.ltorg` directive is recognised by all toolchains supported by Zephyr and no toolchain abstraction is provided for now. Signed-off-by: Stephanos Ioannidis <[email protected]> (cherry picked from commit d7d3ae5)
stephanosio
approved these changes
Jul 8, 2025
wearyzen
approved these changes
Jul 8, 2025
swift-tk
approved these changes
Jul 8, 2025
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Unfortunately this is not supported by IAR and breaks building with CXARM 9.70.1. Many are on vacation right now and as I am not a developer I cannot trouble shoot this myself. |
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Backport d7d3ae5 from #92569.
Fixes #90777