Imported Upstream version 1.2
[platform/upstream/libunwind.git] / src / ppc32 / Gstep.c
index efb993a..8506a61 100644 (file)
@@ -80,48 +80,48 @@ unw_step (unw_cursor_t * cursor)
   if (unlikely (ret < 0))
     {
       if (likely (!unw_is_signal_frame (cursor)))
-       {
-         /* DWARF unwinding failed.  As of 09/26/2006, gcc in 64-bit mode
-            produces the mandatory level of traceback record in the code, but
-            I get the impression that this is transitory, that eventually gcc
-            will not produce any traceback records at all.  So, for now, we
-            won't bother to try to find and use these records.
-
-            We can, however, attempt to unwind the frame by using the callback
-            chain.  This is very crude, however, and won't be able to unwind
-            any registers besides the IP, SP, and LR . */
-
-         back_chain_offset = ((void *) &dummy.back_chain - (void *) &dummy);
-         lr_save_offset = ((void *) &dummy.lr_save - (void *) &dummy);
-
-         back_chain_loc = DWARF_LOC (c->dwarf.cfa + back_chain_offset, 0);
-
-         if ((ret =
-              dwarf_get (&c->dwarf, back_chain_loc, &c->dwarf.cfa)) < 0)
-           {
-             Debug (2,
-                "Unable to retrieve CFA from back chain in stack frame - %d\n",
-                ret);
-             return ret;
-           }
-         if (c->dwarf.cfa == 0)
-           /* Unless the cursor or stack is corrupt or uninitialized we've most
-              likely hit the top of the stack */
-           return 0;
-
-         lr_save_loc = DWARF_LOC (c->dwarf.cfa + lr_save_offset, 0);
-
-         if ((ret = dwarf_get (&c->dwarf, lr_save_loc, &c->dwarf.ip)) < 0)
-           {
-             Debug (2,
-                "Unable to retrieve IP from lr save in stack frame - %d\n",
-                ret);
-             return ret;
-           }
-         ret = 1;
-       }
+        {
+          /* DWARF unwinding failed.  As of 09/26/2006, gcc in 64-bit mode
+             produces the mandatory level of traceback record in the code, but
+             I get the impression that this is transitory, that eventually gcc
+             will not produce any traceback records at all.  So, for now, we
+             won't bother to try to find and use these records.
+
+             We can, however, attempt to unwind the frame by using the callback
+             chain.  This is very crude, however, and won't be able to unwind
+             any registers besides the IP, SP, and LR . */
+
+          back_chain_offset = ((void *) &dummy.back_chain - (void *) &dummy);
+          lr_save_offset = ((void *) &dummy.lr_save - (void *) &dummy);
+
+          back_chain_loc = DWARF_LOC (c->dwarf.cfa + back_chain_offset, 0);
+
+          if ((ret =
+               dwarf_get (&c->dwarf, back_chain_loc, &c->dwarf.cfa)) < 0)
+            {
+              Debug (2,
+                 "Unable to retrieve CFA from back chain in stack frame - %d\n",
+                 ret);
+              return ret;
+            }
+          if (c->dwarf.cfa == 0)
+            /* Unless the cursor or stack is corrupt or uninitialized we've most
+               likely hit the top of the stack */
+            return 0;
+
+          lr_save_loc = DWARF_LOC (c->dwarf.cfa + lr_save_offset, 0);
+
+          if ((ret = dwarf_get (&c->dwarf, lr_save_loc, &c->dwarf.ip)) < 0)
+            {
+              Debug (2,
+                 "Unable to retrieve IP from lr save in stack frame - %d\n",
+                 ret);
+              return ret;
+            }
+          ret = 1;
+        }
       else
-       {
+        {
           /* Find the sigcontext record by taking the CFA and adjusting by
              the dummy signal frame size.
 
@@ -132,178 +132,178 @@ unw_step (unw_cursor_t * cursor)
              following code will likely cause a seg fault or other crash
              condition.  */
 
-         unw_word_t ucontext = c->dwarf.cfa + __SIGNAL_FRAMESIZE;
-
-         Debug (1, "signal frame, skip over trampoline\n");
-
-         c->sigcontext_format = PPC_SCF_LINUX_RT_SIGFRAME;
-         c->sigcontext_addr = ucontext;
-
-         sp_loc = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R1, 0);
-         ip_loc = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_LINK, 0);
-
-         ret = dwarf_get (&c->dwarf, sp_loc, &c->dwarf.cfa);
-         if (ret < 0)
-           {
-             Debug (2, "returning %d\n", ret);
-             return ret;
-           }
-         ret = dwarf_get (&c->dwarf, ip_loc, &c->dwarf.ip);
-         if (ret < 0)
-           {
-             Debug (2, "returning %d\n", ret);
-             return ret;
-           }
-
-         /* Instead of just restoring the non-volatile registers, do all
-            of the registers for now.  This will incur a performance hit,
-            but it's rare enough not to cause too much of a problem, and
-            might be useful in some cases.  */
-         c->dwarf.loc[UNW_PPC32_R0] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R0, 0);
-         c->dwarf.loc[UNW_PPC32_R1] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R1, 0);
-         c->dwarf.loc[UNW_PPC32_R2] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R2, 0);
-         c->dwarf.loc[UNW_PPC32_R3] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R3, 0);
-         c->dwarf.loc[UNW_PPC32_R4] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R4, 0);
-         c->dwarf.loc[UNW_PPC32_R5] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R5, 0);
-         c->dwarf.loc[UNW_PPC32_R6] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R6, 0);
-         c->dwarf.loc[UNW_PPC32_R7] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R7, 0);
-         c->dwarf.loc[UNW_PPC32_R8] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R8, 0);
-         c->dwarf.loc[UNW_PPC32_R9] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R9, 0);
-         c->dwarf.loc[UNW_PPC32_R10] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R10, 0);
-         c->dwarf.loc[UNW_PPC32_R11] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R11, 0);
-         c->dwarf.loc[UNW_PPC32_R12] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R12, 0);
-         c->dwarf.loc[UNW_PPC32_R13] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R13, 0);
-         c->dwarf.loc[UNW_PPC32_R14] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R14, 0);
-         c->dwarf.loc[UNW_PPC32_R15] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R15, 0);
-         c->dwarf.loc[UNW_PPC32_R16] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R16, 0);
-         c->dwarf.loc[UNW_PPC32_R17] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R17, 0);
-         c->dwarf.loc[UNW_PPC32_R18] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R18, 0);
-         c->dwarf.loc[UNW_PPC32_R19] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R19, 0);
-         c->dwarf.loc[UNW_PPC32_R20] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R20, 0);
-         c->dwarf.loc[UNW_PPC32_R21] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R21, 0);
-         c->dwarf.loc[UNW_PPC32_R22] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R22, 0);
-         c->dwarf.loc[UNW_PPC32_R23] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R23, 0);
-         c->dwarf.loc[UNW_PPC32_R24] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R24, 0);
-         c->dwarf.loc[UNW_PPC32_R25] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R25, 0);
-         c->dwarf.loc[UNW_PPC32_R26] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R26, 0);
-         c->dwarf.loc[UNW_PPC32_R27] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R27, 0);
-         c->dwarf.loc[UNW_PPC32_R28] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R28, 0);
-         c->dwarf.loc[UNW_PPC32_R29] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R29, 0);
-         c->dwarf.loc[UNW_PPC32_R30] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R30, 0);
-         c->dwarf.loc[UNW_PPC32_R31] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R31, 0);
-
-         c->dwarf.loc[UNW_PPC32_LR] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_LINK, 0);
-         c->dwarf.loc[UNW_PPC32_CTR] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_CTR, 0);
-
-         /* This CR0 assignment is probably wrong.  There are 8 dwarf columns
-            assigned to the CR registers, but only one CR register in the
-            mcontext structure */
-         c->dwarf.loc[UNW_PPC32_CCR] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_CCR, 0);
-         c->dwarf.loc[UNW_PPC32_XER] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_XER, 0);
-
-         c->dwarf.loc[UNW_PPC32_F0] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R0, 0);
-         c->dwarf.loc[UNW_PPC32_F1] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R1, 0);
-         c->dwarf.loc[UNW_PPC32_F2] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R2, 0);
-         c->dwarf.loc[UNW_PPC32_F3] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R3, 0);
-         c->dwarf.loc[UNW_PPC32_F4] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R4, 0);
-         c->dwarf.loc[UNW_PPC32_F5] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R5, 0);
-         c->dwarf.loc[UNW_PPC32_F6] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R6, 0);
-         c->dwarf.loc[UNW_PPC32_F7] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R7, 0);
-         c->dwarf.loc[UNW_PPC32_F8] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R8, 0);
-         c->dwarf.loc[UNW_PPC32_F9] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R9, 0);
-         c->dwarf.loc[UNW_PPC32_F10] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R10, 0);
-         c->dwarf.loc[UNW_PPC32_F11] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R11, 0);
-         c->dwarf.loc[UNW_PPC32_F12] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R12, 0);
-         c->dwarf.loc[UNW_PPC32_F13] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R13, 0);
-         c->dwarf.loc[UNW_PPC32_F14] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R14, 0);
-         c->dwarf.loc[UNW_PPC32_F15] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R15, 0);
-         c->dwarf.loc[UNW_PPC32_F16] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R16, 0);
-         c->dwarf.loc[UNW_PPC32_F17] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R17, 0);
-         c->dwarf.loc[UNW_PPC32_F18] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R18, 0);
-         c->dwarf.loc[UNW_PPC32_F19] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R19, 0);
-         c->dwarf.loc[UNW_PPC32_F20] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R20, 0);
-         c->dwarf.loc[UNW_PPC32_F21] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R21, 0);
-         c->dwarf.loc[UNW_PPC32_F22] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R22, 0);
-         c->dwarf.loc[UNW_PPC32_F23] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R23, 0);
-         c->dwarf.loc[UNW_PPC32_F24] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R24, 0);
-         c->dwarf.loc[UNW_PPC32_F25] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R25, 0);
-         c->dwarf.loc[UNW_PPC32_F26] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R26, 0);
-         c->dwarf.loc[UNW_PPC32_F27] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R27, 0);
-         c->dwarf.loc[UNW_PPC32_F28] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R28, 0);
-         c->dwarf.loc[UNW_PPC32_F29] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R29, 0);
-         c->dwarf.loc[UNW_PPC32_F30] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R30, 0);
-         c->dwarf.loc[UNW_PPC32_F31] =
-           DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R31, 0);
-
-         ret = 1;
-       }
+          unw_word_t ucontext = c->dwarf.cfa + __SIGNAL_FRAMESIZE;
+
+          Debug (1, "signal frame, skip over trampoline\n");
+
+          c->sigcontext_format = PPC_SCF_LINUX_RT_SIGFRAME;
+          c->sigcontext_addr = ucontext;
+
+          sp_loc = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R1, 0);
+          ip_loc = DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_LINK, 0);
+
+          ret = dwarf_get (&c->dwarf, sp_loc, &c->dwarf.cfa);
+          if (ret < 0)
+            {
+              Debug (2, "returning %d\n", ret);
+              return ret;
+            }
+          ret = dwarf_get (&c->dwarf, ip_loc, &c->dwarf.ip);
+          if (ret < 0)
+            {
+              Debug (2, "returning %d\n", ret);
+              return ret;
+            }
+
+          /* Instead of just restoring the non-volatile registers, do all
+             of the registers for now.  This will incur a performance hit,
+             but it's rare enough not to cause too much of a problem, and
+             might be useful in some cases.  */
+          c->dwarf.loc[UNW_PPC32_R0] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R0, 0);
+          c->dwarf.loc[UNW_PPC32_R1] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R1, 0);
+          c->dwarf.loc[UNW_PPC32_R2] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R2, 0);
+          c->dwarf.loc[UNW_PPC32_R3] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R3, 0);
+          c->dwarf.loc[UNW_PPC32_R4] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R4, 0);
+          c->dwarf.loc[UNW_PPC32_R5] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R5, 0);
+          c->dwarf.loc[UNW_PPC32_R6] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R6, 0);
+          c->dwarf.loc[UNW_PPC32_R7] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R7, 0);
+          c->dwarf.loc[UNW_PPC32_R8] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R8, 0);
+          c->dwarf.loc[UNW_PPC32_R9] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R9, 0);
+          c->dwarf.loc[UNW_PPC32_R10] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R10, 0);
+          c->dwarf.loc[UNW_PPC32_R11] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R11, 0);
+          c->dwarf.loc[UNW_PPC32_R12] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R12, 0);
+          c->dwarf.loc[UNW_PPC32_R13] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R13, 0);
+          c->dwarf.loc[UNW_PPC32_R14] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R14, 0);
+          c->dwarf.loc[UNW_PPC32_R15] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R15, 0);
+          c->dwarf.loc[UNW_PPC32_R16] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R16, 0);
+          c->dwarf.loc[UNW_PPC32_R17] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R17, 0);
+          c->dwarf.loc[UNW_PPC32_R18] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R18, 0);
+          c->dwarf.loc[UNW_PPC32_R19] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R19, 0);
+          c->dwarf.loc[UNW_PPC32_R20] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R20, 0);
+          c->dwarf.loc[UNW_PPC32_R21] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R21, 0);
+          c->dwarf.loc[UNW_PPC32_R22] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R22, 0);
+          c->dwarf.loc[UNW_PPC32_R23] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R23, 0);
+          c->dwarf.loc[UNW_PPC32_R24] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R24, 0);
+          c->dwarf.loc[UNW_PPC32_R25] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R25, 0);
+          c->dwarf.loc[UNW_PPC32_R26] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R26, 0);
+          c->dwarf.loc[UNW_PPC32_R27] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R27, 0);
+          c->dwarf.loc[UNW_PPC32_R28] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R28, 0);
+          c->dwarf.loc[UNW_PPC32_R29] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R29, 0);
+          c->dwarf.loc[UNW_PPC32_R30] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R30, 0);
+          c->dwarf.loc[UNW_PPC32_R31] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_R31, 0);
+
+          c->dwarf.loc[UNW_PPC32_LR] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_LINK, 0);
+          c->dwarf.loc[UNW_PPC32_CTR] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_CTR, 0);
+
+          /* This CR0 assignment is probably wrong.  There are 8 dwarf columns
+             assigned to the CR registers, but only one CR register in the
+             mcontext structure */
+          c->dwarf.loc[UNW_PPC32_CCR] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_CCR, 0);
+          c->dwarf.loc[UNW_PPC32_XER] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_GREGS_XER, 0);
+
+          c->dwarf.loc[UNW_PPC32_F0] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R0, 0);
+          c->dwarf.loc[UNW_PPC32_F1] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R1, 0);
+          c->dwarf.loc[UNW_PPC32_F2] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R2, 0);
+          c->dwarf.loc[UNW_PPC32_F3] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R3, 0);
+          c->dwarf.loc[UNW_PPC32_F4] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R4, 0);
+          c->dwarf.loc[UNW_PPC32_F5] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R5, 0);
+          c->dwarf.loc[UNW_PPC32_F6] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R6, 0);
+          c->dwarf.loc[UNW_PPC32_F7] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R7, 0);
+          c->dwarf.loc[UNW_PPC32_F8] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R8, 0);
+          c->dwarf.loc[UNW_PPC32_F9] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R9, 0);
+          c->dwarf.loc[UNW_PPC32_F10] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R10, 0);
+          c->dwarf.loc[UNW_PPC32_F11] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R11, 0);
+          c->dwarf.loc[UNW_PPC32_F12] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R12, 0);
+          c->dwarf.loc[UNW_PPC32_F13] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R13, 0);
+          c->dwarf.loc[UNW_PPC32_F14] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R14, 0);
+          c->dwarf.loc[UNW_PPC32_F15] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R15, 0);
+          c->dwarf.loc[UNW_PPC32_F16] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R16, 0);
+          c->dwarf.loc[UNW_PPC32_F17] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R17, 0);
+          c->dwarf.loc[UNW_PPC32_F18] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R18, 0);
+          c->dwarf.loc[UNW_PPC32_F19] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R19, 0);
+          c->dwarf.loc[UNW_PPC32_F20] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R20, 0);
+          c->dwarf.loc[UNW_PPC32_F21] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R21, 0);
+          c->dwarf.loc[UNW_PPC32_F22] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R22, 0);
+          c->dwarf.loc[UNW_PPC32_F23] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R23, 0);
+          c->dwarf.loc[UNW_PPC32_F24] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R24, 0);
+          c->dwarf.loc[UNW_PPC32_F25] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R25, 0);
+          c->dwarf.loc[UNW_PPC32_F26] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R26, 0);
+          c->dwarf.loc[UNW_PPC32_F27] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R27, 0);
+          c->dwarf.loc[UNW_PPC32_F28] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R28, 0);
+          c->dwarf.loc[UNW_PPC32_F29] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R29, 0);
+          c->dwarf.loc[UNW_PPC32_F30] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R30, 0);
+          c->dwarf.loc[UNW_PPC32_F31] =
+            DWARF_LOC (ucontext + UC_MCONTEXT_FREGS_R31, 0);
+
+          ret = 1;
+        }
     }
   return ret;
 }