arm: vectors support
Add support for tests to use exception handlers using
install_exception_handler(). This patch also adds start_usr(),
which can be used to start a function in USR mode, using a given
stack pointer. start_usr() is used by a new selftest test that
checks the new vector support.
Signed-off-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
---
v7:
- selftest.c: s/alloc_aligned/memalign/
- lib/arm/processor.c remove unnecessary include "asm/setup.h"
v6: use alloc() for start_usr
v5: rebase change: replace __stringify with libcflat's new xstr
macro
v4: a couple tweaks to fit changes in the other patches,
vectors-usr test now has an 8K usr stack
v3:
- squashed in 'arm: Simplify exceptions_init in cstart.S'
[Christoffer Dall]
- suggested function name changes and comment additions
[Christoffer Dall]
- fix a bug with stack restore from usr mode exceptions that
Christoffer pointed out. Add a get_sp() accessor too.
7 files changed
