[PULL 09/59] linux-user: Use target_restore_altstack in all sigreturn

From: Richard Henderson Note that target_restore_altstack uses the host memory pointer that we have already verified, so TARGET_EFAULT is not a possible return value. Note that using -EFAULT was a bug. Signed-off-by: Richard Henderson Message-Id: <20210426025334.1168495-3-richard.hender...@lin

[PULL 09/59] linux-user: Use target_restore_altstack in all sigreturn

From: Richard Henderson Note that target_restore_altstack uses the host memory pointer that we have already verified, so TARGET_EFAULT is not a possible return value. Note that using -EFAULT was a bug. Signed-off-by: Richard Henderson Message-Id: <20210426025334.1168495-3-richard.hender...@lin