使用Qemu运行MIPS二进制文件

Question

我目前正在尝试使用qemu运行MIPS二进制文件。 我的主机系统是Arch Linux。 截至目前，我已经进入了要运行的二进制文件所在的固件的根目录。 我还将qemu-mips二进制文件从主机系统复制到了固件的根目录中。

在固件的根目录中，我正在运行以下命令：

sudo chroot . ./qemu-mips bin/busybox

但是我收到此错误：

chroot: failed to run command ‘./qemu-mips’: No such file or directory

考虑到我只是将qemu-mips二进制文件复制到了我当前所在的固件的根目录中，所以这很奇怪。 我阅读的大多数指南都描述了如何使用qemu-mips-static，但是即使安装了所有可用的qemu工具，该二进制文件在我的系统上也不存在。 我缺少什么明显的东西吗？ 谢谢。

  execve("/usr/sbin/chroot", ["chroot", ".", "./qemu-mips", "bin/busybox"], 0x7fffc0804f98 /* 16 vars */) = 0
brk(NULL)                               = 0x5653dd4e7000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=124268, ...}) = 0 
mmap(NULL, 124268, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f209819a000
close(3)                                = 0
openat(AT_FDCWD, "/usr/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`\20\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=2069912, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =    0x7f2098198000
mmap(NULL, 3897584, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f2097bdd000
mprotect(0x7f2097d8b000, 2097152, PROT_NONE) = 0
mmap(0x7f2097f8b000, 24576, PROT_READ|PROT_WRITE,   MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1ae000) = 0x7f2097f8b000
mmap(0x7f2097f91000, 14576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f2097f91000
close(3)                                = 0
arch_prctl(ARCH_SET_FS, 0x7f2098199500) = 0
mprotect(0x7f2097f8b000, 16384, PROT_READ) = 0
mprotect(0x5653dcd5b000, 4096, PROT_READ) = 0
mprotect(0x7f20981b9000, 4096, PROT_READ) = 0
munmap(0x7f209819a000, 124268)          = 0
brk(NULL)                               = 0x5653dd4e7000
brk(0x5653dd508000)                     = 0x5653dd508000
open("/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=1682192, ...}) = 0
mmap(NULL, 1682192, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f2097ffd000
close(3)                                = 0
getcwd("/home/user/firmware/kkeps-root", 4096) = 46
chroot(".")                             = 0
chdir("/")                              = 0
execve("./qemu-mips", ["./qemu-mips", "bin/busybox"], 0x7ffec746eba0 /* 16 vars */) = -1 ENOENT     (No such file or directory)
open("/usr/share/locale/locale.alias", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en_US.UTF-8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en_US.utf8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en_US/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en.UTF-8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en.utf8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/charset.alias", O_RDONLY|O_NOFOLLOW) = -1 ENOENT (No such file or directory)
write(2, "chroot: ", 8chroot: )                 = 8
write(2, "failed to run command \342\200\230./qemu-"..., 39failed to run command ‘./qemu-mips’) = 39
open("/usr/share/locale/en_US.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en_US.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or     directory)
open("/usr/share/locale/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory) 
write(2, ": No such file or directory", 27: No such file or directory) = 27
write(2, "\n", 1
)                       = 1
close(1)                                = 0
close(2)                                = 0
exit_group(127)                         = ?
+++ exited with 127 +++

因此，似乎有一些未找到的东西，其中之一是/etc/ld.so.preload。 我不确定100％如何处理这种情况。 我猜想这与我没有使用静态二进制文件有关。

编辑：通过从AUR安装qemu-user-static进行了修复。

Answer 1

如您所知，这是因为您没有使用静态链接的二进制文件。 实际上并不一定要在chroot中使用静态QEMU二进制文件，只是对于静态二进制文件，您只需要将一个文件复制到chroot中，而如果使用动态链接的QEMU，则还需要在主机动态目录中复制链接器和QEMU链接到的所有主机库-如果主机和来宾要对动态库使用相同的路径名，则可能会遇到问题。