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In order for our emulation of MAP_FIXED_NOREPLACE to succeed within
linux-user target_mmap, we require a non-zero value. This does not
require host kernel support, merely the bit being defined.
MAP_FIXED_NOREPLACE was added with glibc 2.28. From repology.org:
Fedora 36: 2.35
CentOS 8 (RHEL-8): 2.28
Debian 11: 2.31
OpenSUSE Leap 15.4: 2.31
Ubuntu LTS 20.04: 2.31
Reported-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230808164418.69989-1-richard.henderson@linaro.org>