MicroBlaze CPU model has a "little-endian" property, pointing to
the @endi internal field. Commit c36ec3a965 ("hw/microblaze:
Explicit CPU endianness") took care of having all MicroBlaze
boards with an explicit default endianness, so later commit
415aae543e ("target/microblaze: Consider endianness while
translating code") could infer the endianness at runtime from
the @endi field, and not a compile time via the TARGET_BIG_ENDIAN
definition. Doing so, we forgot to make the endianness explicit
on user emulation, so there all CPUs are started with the default
"little-endian=off" value, leading to breaking support for little
endian binaries:
$ readelf -h ./hello-world-mbel
ELF Header:
Magic: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00
Class: ELF32
Data: 2's complement, little endian
$ qemu-microblazeel ./hello-world-mbel
qemu: uncaught target signal 11 (Segmentation fault) - core dumped
Segmentation fault (core dumped)
Fix by restoring the previous behavior of starting with the
builtin endianness of the binary:
$ qemu-microblazeel ./hello-world-mbel
Hello World
Cc: qemu-stable@nongnu.org
Fixes: 415aae543e ("target/microblaze: Consider endianness while translating code")
Reported-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
Message-Id: <20251006173350.17455-1-philmd@linaro.org>
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