在2.52b版本中，由于年代久远，build_qemu_support.sh文件需要更新一下
将以下内容写到patches的memfd_create.diff中
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| diff -ru qemu-2.10.0-clean/util/memfd.c qemu-2.10.0/util/memfd.c
--- qemu-2.10.0-clean/util/memfd.c 2018-11-20 18:11:00.170271506 +0100
+++ qemu-2.10.0/util/memfd.c 2018-11-20 18:11:13.398423613 +0100
@@ -37,7 +37,7 @@
#include <sys/syscall.h>
#include <asm/unistd.h>
-static int memfd_create(const char *name, unsigned int flags)
+int memfd_create(const char *name, unsigned int flags)
{
#ifdef __NR_memfd_create
return syscall(__NR_memfd_create, name, flags);
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在build_qemu_support.sh中的
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| patch -p1 <../patches/elfload.diff || exit 1
patch -p1 <../patches/cpu-exec.diff || exit 1
patch -p1 <../patches/syscall.diff || exit 1
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加上一行
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| patch -p1 <../patches/memfd_create.diff || exit 1
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