aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorRiku Voipio <riku.voipio@linaro.org>2014-08-12 15:58:57 +0300
committerRiku Voipio <riku.voipio@linaro.org>2014-08-22 15:06:34 +0300
commit9af5c906d189d8f4aae902d75567639d2a8f4e22 (patch)
tree46ddbea715bab06eba0eb1063f8565284f8420ef
parentab31cda3270994ab7a59a3ed8d44029a52af95a3 (diff)
downloadqemu-arm-9af5c906d189d8f4aae902d75567639d2a8f4e22.tar.gz
linux-user: add setns and unshare
Add support for the setns and unshare syscalls, trivially passed through to the host. Based on patches by Paul Burton, added configure check. Signed-off-by: Paul Burton <paul@archlinuxmips.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
-rwxr-xr-xconfigure20
-rw-r--r--linux-user/strace.list3
-rw-r--r--linux-user/syscall.c11
3 files changed, 34 insertions, 0 deletions
diff --git a/configure b/configure
index 3d0ab1b193..c4e47e1ea1 100755
--- a/configure
+++ b/configure
@@ -3470,6 +3470,23 @@ if compile_prog "" "" ; then
timerfd=yes
fi
+# check for setns and unshare support
+setns=no
+cat > $TMPC << EOF
+#include <sched.h>
+
+int main(void)
+{
+ int ret;
+ ret = setns(0, 0);
+ ret = unshare(0);
+ return ret;
+}
+EOF
+if compile_prog "" "" ; then
+ setns=yes
+fi
+
# Check if tools are available to build documentation.
if test "$docs" != "no" ; then
if has makeinfo && has pod2man; then
@@ -4541,6 +4558,9 @@ fi
if test "$timerfd" = "yes" ; then
echo "CONFIG_TIMERFD=y" >> $config_host_mak
fi
+if test "$setns" = "yes" ; then
+ echo "CONFIG_SETNS=y" >> $config_host_mak
+fi
if test "$inotify" = "yes" ; then
echo "CONFIG_INOTIFY=y" >> $config_host_mak
fi
diff --git a/linux-user/strace.list b/linux-user/strace.list
index 8de972a6ee..aa0cd735cc 100644
--- a/linux-user/strace.list
+++ b/linux-user/strace.list
@@ -1185,6 +1185,9 @@
#ifdef TARGET_NR_set_mempolicy
{ TARGET_NR_set_mempolicy, "set_mempolicy" , NULL, NULL, NULL },
#endif
+#ifdef TARGET_NR_setns
+{ TARGET_NR_setns, "setns" , NULL, NULL, NULL },
+#endif
#ifdef TARGET_NR_setpgid
{ TARGET_NR_setpgid, "setpgid" , NULL, NULL, NULL },
#endif
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index f1c182bbae..dae10afcb8 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -9610,6 +9610,17 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
break;
#endif
+#if defined(TARGET_NR_setns) && defined(CONFIG_SETNS)
+ case TARGET_NR_setns:
+ ret = get_errno(setns(arg1, arg2));
+ break;
+#endif
+#if defined(TARGET_NR_unshare) && defined(CONFIG_SETNS)
+ case TARGET_NR_unshare:
+ ret = get_errno(unshare(arg1));
+ break;
+#endif
+
default:
unimplemented:
gemu_log("qemu: Unsupported syscall: %d\n", num);