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* pa/pa32-linux.h (CRT_CALL_STATIC_FUNCTION): Define when CRTSTUFFS_O
[pf3gnuchains/gcc-fork.git] / gcc / config / pa / pa32-linux.h
index 0df6305..69c73fc 100644 (file)
@@ -1,5 +1,5 @@
 /* Definitions for PA_RISC with ELF-32 format
-   Copyright (C) 2000, 2002, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2000, 2002, 2004, 2006 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -36,4 +36,26 @@ Boston, MA 02110-1301, USA.  */
                    aligned(sizeof(func_ptr))))                         \
     = { (func_ptr) (-1) }
 
+/* This is a PIC version of CRT_CALL_STATIC_FUNCTION.  The PIC
+   register has to be saved before the call and restored after
+   the call.  We assume that register %r4 is available for this
+   purpose.  The hack prevents GCC from deleting the restore.  */
+#ifdef CRTSTUFFS_O
+#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)     \
+static void __attribute__((__used__))                  \
+call_ ## FUNC (void)                                   \
+{                                                      \
+  asm (SECTION_OP);                                    \
+  asm volatile ("bl " #FUNC ",%%r2\n\t"                        \
+               "copy %%r19,%%r4\n\t"                   \
+               "copy %%r4,%%r19\n"                     \
+               :                                       \
+               :                                       \
+               : "r1", "r2", "r4", "r20", "r21",       \
+                 "r22", "r24", "r24", "r25", "r26",    \
+                 "r27", "r28", "r29", "r31");          \
+  asm (TEXT_SECTION_ASM_OP);                           \
+}
+#endif
+
 #define MD_UNWIND_SUPPORT "config/pa/linux-unwind.h"