[Qemu-devel] [PATCH] i386-linux-user NPTL support

[Ulrich Hecht <uli@suse.de>]

Makes NPTL binaries run by implementing TLS.

Signed-off-by: Ulrich Hecht <uli@suse.de>
---
 configure            |    1 +
 linux-user/syscall.c |   16 ++++++++++++++--
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index 824b21c..c3c5d4a 100755
--- a/configure
+++ b/configure
@@ -1894,6 +1894,7 @@ TARGET_ABI_DIR=""
 case "$target_arch2" in
   i386)
     target_phys_bits=32
+    target_nptl="yes"
   ;;
   x86_64)
     TARGET_BASE_ARCH=i386
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 5778e32..bbaec3d 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -3730,8 +3730,14 @@ static int do_fork(CPUState *env, unsigned int flags, abi_ulong newsp,
             ts->child_tidptr = child_tidptr;
         }
 
-        if (nptl_flags & CLONE_SETTLS)
+        if (nptl_flags & CLONE_SETTLS) {
+#if defined(TARGET_I386) && defined(TARGET_ABI32)
+            do_set_thread_area(new_env, newtls);
+            cpu_x86_load_seg(new_env, R_GS, new_env->segs[R_GS].selector);
+#else
             cpu_set_tls (new_env, newtls);
+#endif
+        }
 
         /* Grab a mutex so that thread setup appears atomic.  */
         pthread_mutex_lock(&clone_lock);
@@ -3804,8 +3810,14 @@ static int do_fork(CPUState *env, unsigned int flags, abi_ulong newsp,
             if (flags & CLONE_PARENT_SETTID)
                 put_user_u32(gettid(), parent_tidptr);
             ts = (TaskState *)env->opaque;
-            if (flags & CLONE_SETTLS)
+            if (flags & CLONE_SETTLS) {
+#if defined(TARGET_I386) && defined(TARGET_ABI32)
+                do_set_thread_area(env, newtls);
+                cpu_x86_load_seg(env, R_GS, env->segs[R_GS].selector);
+#else
                 cpu_set_tls (env, newtls);
+#endif
+            }
             if (flags & CLONE_CHILD_CLEARTID)
                 ts->child_tidptr = child_tidptr;
 #endif
-- 
1.6.4