2002-08-07 Roland McGrath <roland@redhat.com>

	* sysdeps/i386/tls.h (TLS_DO_MODIFY_LDT): Add an extra argument with
	an "m" constraint to the asm so the compiler knows LDT_ENTRY was used.

diff --git a/linuxthreads/sysdeps/i386/tls.h b/linuxthreads/sysdeps/i386/tls.h
index 55ccecc..a00de6c 100644 (file)
--- a/linuxthreads/sysdeps/i386/tls.h
+++ b/linuxthreads/sysdeps/i386/tls.h
@@ -94,12 +94,16 @@ typedef struct
     { nr, (unsigned long int) (descr), sizeof (struct _pthread_descr_struct), \
       1, 0, 0, 0, 0, 1, 0 };                                                 \
   int result;                                                                \
-  asm ("pushl %%ebx\n\t"                                                     \
+  asm volatile (                                                             \
+       "pushl %%ebx\n\t"                                                     \
        "movl $1, %%ebx\n\t"                                                  \
        "int $0x80\n\t"                                                       \
        "popl %%ebx"                                                          \
        : "=a" (result)                                                       \
-       : "0" (__NR_modify_ldt), "d" (sizeof (ldt_entry)), "c" (&ldt_entry));  \
+       : "0" (__NR_modify_ldt),                                                      \
+         /* The extra argument with the "m" constraint is necessary          \
+           to let the compiler know that we are accessing LDT_ENTRY here.  */\
+         "m" (ldt_entry), "c" (&ldt_entry), "d" (sizeof (ldt_entry)));       \
   __builtin_expect (result, 0) != 0 ? -1 : nr * 8 + 7;                       \
 })