Merge branch 'riscv/queue' into 'master'

riscv: Add EFI support and SBI base ext tests

See merge request kvm-unit-tests/kvm-unit-tests!54

treewide: lib/stack: Fix backtrace

We should never pass the result of __builtin_frame_address(0) to
another function since the compiler is within its rights to pop the
frame to which it points befor

treewide: lib/stack: Fix backtrace

We should never pass the result of __builtin_frame_address(0) to
another function since the compiler is within its rights to pop the
frame to which it points before making the function call, as may be
done for tail calls. Nobody has complained about backtrace(), so
likely all compilations have been inlining backtrace_frame(), not
dropping the frame on the tail call, or nobody is looking at traces.
However, for riscv, when built for EFI, it does drop the frame on the
tail call, and it was noticed. Preemptively fix backtrace() for all
architectures.

Fixes: 52266791750d ("lib: backtrace printing")
Acked-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Andrew Jones <andrew.jones@linux.dev>

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arm: stack: add dump_stack support

This actually fixes the arm build too, as arm's __builtin_return_address
doesn't allow any input other than zero, and thus the common backtrace()
wasn't compiling.

arm: stack: add dump_stack support

This actually fixes the arm build too, as arm's __builtin_return_address
doesn't allow any input other than zero, and thus the common backtrace()
wasn't compiling.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Reviewed-By: Peter Feiner <pfeiner@google.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>

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