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[PATCH] ARM EABI alignment
- From: Paul Brook <paul at codesourcery dot com>
- To: gcc-patches at gcc dot gnu dot org
- Cc: Richard Earnshaw <rearnsha at arm dot com>,Mark Mitchell <mark at codesourcery dot com>
- Date: Wed, 3 Mar 2004 16:42:21 +0000
- Subject: [PATCH] ARM EABI alignment
- Organization: CodeSourcery
The attached patch implements the changes neccessary to make gcc conform to
the ARM EABI. It basically gives the stack and doubleword types doubleword
alignment, and changes the default structure alignment to 8.
This is enabled by -maapcs. The deafult behaviour is unchanged.
I replaced arm_get_frame_size with arm_get_frame_offsets with the aim of
concentrating kowledge of the stack layout in one place. This has simplified
arm_get_initial_elimination_offsets, but has caused several other fairly
neutral changes. I've left these changes in the patch, but can revert to the
original method if the churn doesn't seem worthwhile.
Tested with cross-compiler to arm-none-elf both -maapcs and -mno-aapcs, and
compat tests vs. unmodified compiler.
Ok for mainline, and csl-arm-branch assuming it also passes testing there?
This patch depends on http://gcc.gnu.org/ml/gcc-patches/2004-02/msg02699.html
(sill unreviewed) for correct operation.
Paul