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linux-user: Use MAP_FIXED_NOREPLACE for do_brk()

MAP_FIXED_NOREPLACE can ensure the mapped address is fixed without
concerning that the new mapping overwrites something else.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20230802071754.14876-5-akihiko.odaki@daynix.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Akihiko Odaki committed 3y ago

e69e032d1a8ee8d754ca119009a3c2c997f8bb30

Parent: c6cc059

Committed by Richard Henderson <richard.henderson@linaro.org> on 8/6/2023, 11:44:52 PM