Index: uspace/lib/libc/arch/ia32/include/fibril.h
===================================================================
--- uspace/lib/libc/arch/ia32/include/fibril.h	(revision e15e0e8bcc3e3f28628a17ecc49ae0d7e5c356f8)
+++ uspace/lib/libc/arch/ia32/include/fibril.h	(revision b2a5b41da250fa9fd11069ca9980d8f83e70c2a2)
@@ -44,4 +44,12 @@
 #define SP_DELTA     (12)
 
+#define context_set(c, _pc, stack, size, ptls) \
+	do { \
+		(c)->pc = (sysarg_t) (_pc); \
+		(c)->sp = ((sysarg_t) (stack)) + (size) - SP_DELTA; \
+		(c)->tls = (sysarg_t) (ptls); \
+		(c)->ebp = 0; \
+	} while (0)
+	
 /* We include only registers that must be preserved
  * during function call