qemu.sh

set -ex

main() {
    local version=2.10.0

    local arch=$1 \
          os=$2 \
          td=$(mktemp -d)

    local dependencies=(
        autoconf
        automake
        bzip2
        curl
        g++
        libglib2.0-dev
        libtool
        make
        patch
        pkg-config
        zlib1g-dev
    )

    apt-get update
    local purge_list=()
    for dep in ${dependencies[@]}; do
        if ! dpkg -L $dep; then
            apt-get install --no-install-recommends -y $dep
            purge_list+=( $dep )
        fi
    done

    pushd $td

    curl -L http://wiki.qemu-project.org/download/qemu-$version.tar.bz2 | \
        tar --strip-components=1 -xj

    # Allow qemu to run android (bionic libc) binaries
    # https://lists.nongnu.org/archive/html/qemu-trivial/2017-10/msg00025.html
    # https://lists.nongnu.org/archive/html/qemu-trivial/2017-10/msg00023.html
    if [[ "$os" == "android" ]]; then
      patch -p1 <<'EOF'
diff -ur qemu-2.10.0/linux-user/elfload.c qemu-2.10.0.new/linux-user/elfload.c
--- qemu-2.10.0/linux-user/elfload.c	2017-09-27 11:27:13.866595788 -0300
+++ qemu-2.10.0.new/linux-user/elfload.c	2017-09-27 11:58:30.662613425 -0300
@@ -1354,7 +1354,7 @@
                                  ~(abi_ulong)(TARGET_ELF_EXEC_PAGESIZE-1))
 #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
 
-#define DLINFO_ITEMS 14
+#define DLINFO_ITEMS 15
 
 static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
 {
@@ -1782,6 +1782,7 @@
     NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP);
     NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK));
     NEW_AUX_ENT(AT_RANDOM, (abi_ulong) u_rand_bytes);
+    NEW_AUX_ENT(AT_SECURE, (abi_ulong) (getuid() != geteuid() || getgid() != getegid()));
 
 #ifdef ELF_HWCAP2
     NEW_AUX_ENT(AT_HWCAP2, (abi_ulong) ELF_HWCAP2);
diff -ur qemu-2.10.0/linux-user/ioctls.h qemu-2.10.0.new/linux-user/ioctls.h
--- qemu-2.10.0/linux-user/ioctls.h	2017-09-27 11:27:13.858595669 -0300
+++ qemu-2.10.0.new/linux-user/ioctls.h	2017-09-27 11:43:40.613299859 -0300
@@ -173,6 +173,11 @@
   IOCTL(SIOCGSTAMP, IOC_R, MK_PTR(MK_STRUCT(STRUCT_timeval)))
   IOCTL(SIOCGSTAMPNS, IOC_R, MK_PTR(MK_STRUCT(STRUCT_timespec)))
 
+  IOCTL(RNDGETENTCNT, IOC_R, MK_PTR(TYPE_INT))
+  IOCTL(RNDADDTOENTCNT, IOC_W, MK_PTR(TYPE_INT))
+  IOCTL(RNDZAPENTCNT, 0, TYPE_NULL)
+  IOCTL(RNDCLEARPOOL, 0, TYPE_NULL)
+
   IOCTL(CDROMPAUSE, 0, TYPE_NULL)
   IOCTL(CDROMSTART, 0, TYPE_NULL)
   IOCTL(CDROMSTOP, 0, TYPE_NULL)
diff -ur qemu-2.10.0/linux-user/syscall.c qemu-2.10.0.new/linux-user/syscall.c
--- qemu-2.10.0/linux-user/syscall.c	2017-09-27 11:27:13.862595729 -0300
+++ qemu-2.10.0.new/linux-user/syscall.c	2017-09-27 11:44:26.133987660 -0300
@@ -59,6 +59,7 @@ int __clone2(int (*fn)(void *), void *child_stack_base,
 #include <linux/icmp.h>
 #include <linux/icmpv6.h>
 #include <linux/errqueue.h>
+#include <linux/random.h>
 #include "qemu-common.h"
 #ifdef CONFIG_TIMERFD
 #include <sys/timerfd.h>
diff -ur qemu-2.10.0/linux-user/syscall_defs.h qemu-2.10.0.new/linux-user/syscall_defs.h
--- qemu-2.10.0/linux-user/syscall_defs.h	2017-09-27 11:27:13.862595729 -0300
+++ qemu-2.10.0.new/linux-user/syscall_defs.h	2017-09-27 11:46:09.303545817 -0300
@@ -1060,6 +1060,13 @@ struct target_pollfd {
 
 #define TARGET_SIOCGIWNAME     0x8B01          /* get name == wireless protocol */
 
+/* From <linux/random.h> */
+
+#define TARGET_RNDGETENTCNT    TARGET_IOR('R', 0x00, int)
+#define TARGET_RNDADDTOENTCNT  TARGET_IOW('R', 0x01, int)
+#define TARGET_RNDZAPENTCNT    TARGET_IO('R', 0x04)
+#define TARGET_RNDCLEARPOOL    TARGET_IO('R', 0x06)
+
 /* From <linux/fs.h> */
 
 #define TARGET_BLKROSET   TARGET_IO(0x12,93) /* set device read-only (0 = read-write) */
EOF
   fi

    ./configure \
        --disable-kvm \
        --disable-vnc \
        --enable-user \
        --static \
        --target-list=$arch-linux-user
    nice make -j$(nproc)
    make install

    # HACK the binfmt_misc interpreter we'll use expects the QEMU binary to be
    # in /usr/bin. Create an appropriate symlink
    ln -s /usr/local/bin/qemu-$arch /usr/bin/qemu-$arch-static

    # Clean up
    apt-get purge --auto-remove -y ${purge_list[@]}

    popd

    rm -rf $td
    rm $0
}

main "${@}"