ARM EABI on armv4

Patches

Public Domain

Halted

The ARM EABI is a new ABI for the ARM architecture which has, among other things, better system call conventions and improved floating point emulation. Unfortunately, it also requires Thumb interworking, but the Thumb instruction set is not available on armv4 cores (including the StrongARM, used in for example the Balloon Board). A set of patches to GCC can be used to enable armv4- and EABI-compatible code to be generated, at the cost of some extra instructions for each jump. This page contains the current (not-yet-working) set of patches.

This page on the Debian wiki documents these issues in significantly more detail.

Files

gcc-4.1-arm-eabi-on-armv4-disable-interworkingtest.patch — patch to disable tests for interworking on armv4 (enables generation of interworkable code on armv4).
gcc-4.1-arm-eabi-on-armv4.patch — patch to cause armv4-compatible interworking code to be generated, originally contributed by Richard K. Pixley (message), fixed up a little by Laurence Withers.
gcc-4.1-arm-eabi-target-armv4-by-default.patch — cause GCC to target armv4 by default when called with no -march= commandline argument.