x

From-SVN: r13202

gcc/config/mips/mips.h

@@ -920,10 +920,17 @@ while (0)
    since the length can run past this up to a continuation point.  */
 #define DBX_CONTIN_LENGTH 1500
 
-
 /* How to renumber registers for dbx and gdb. */
 #define DBX_REGISTER_NUMBER(REGNO) mips_dbx_regno[ (REGNO) ]
 
+/* The mapping from gcc register number to DWARF 2 CFA column number.
+   This mapping does not allow for tracking DBX register 0, since column 0
+   is used for the frame address, but since register 0 is fixed this is
+   not really a problem.  */
+#define DWARF_FRAME_REGNUM(REG) (DBX_REGISTER_NUMBER (REG))
+
+/* The DWARF 2 CFA column which tracks the return address.  */
+#define DWARF_FRAME_RETURN_COLUMN (FP_REG_LAST + 1)
 
 /* Overrides for the COFF debug format.  */
 #define PUT_SDB_SCL(a)					\

gcc/dwarf2.h

@@ -503,82 +503,6 @@ enum dwarf_call_frame_info
 #define DW_CFA_low_user   0x1c
 #define DW_CFA_high_user  0x3f
 
-/* SGI/MIPS call frame register usage information */
-enum dwarf_call_reg_usage
-  {
-    DW_FRAME_CFA_COL = 0,
-    DW_FRAME_REG1 = 1,
-    DW_FRAME_REG2 = 2,
-    DW_FRAME_REG3 = 3,
-    DW_FRAME_REG4 = 4,
-    DW_FRAME_REG5 = 5,
-    DW_FRAME_REG6 = 6,
-    DW_FRAME_REG7 = 7,
-    DW_FRAME_REG8 = 8,
-    DW_FRAME_REG9 = 9,
-    DW_FRAME_REG10 = 10,
-    DW_FRAME_REG11 = 11,
-    DW_FRAME_REG12 = 12,
-    DW_FRAME_REG13 = 13,
-    DW_FRAME_REG14 = 14,
-    DW_FRAME_REG15 = 15,
-    DW_FRAME_REG16 = 16,
-    DW_FRAME_REG17 = 17,
-    DW_FRAME_REG18 = 18,
-    DW_FRAME_REG19 = 19,
-    DW_FRAME_REG20 = 20,
-    DW_FRAME_REG21 = 21,
-    DW_FRAME_REG22 = 22,
-    DW_FRAME_REG23 = 23,
-    DW_FRAME_REG24 = 24,
-    DW_FRAME_REG25 = 25,
-    DW_FRAME_REG26 = 26,
-    DW_FRAME_REG27 = 27,
-    DW_FRAME_REG28 = 28,
-    DW_FRAME_REG29 = 29,
-    DW_FRAME_REG30 = 30,
-    DW_FRAME_REG31 = 31,
-    DW_FRAME_FREG0 = 32,
-    DW_FRAME_FREG1 = 33,
-    DW_FRAME_FREG2 = 34,
-    DW_FRAME_FREG3 = 35,
-    DW_FRAME_FREG4 = 36,
-    DW_FRAME_FREG5 = 37,
-    DW_FRAME_FREG6 = 38,
-    DW_FRAME_FREG7 = 39,
-    DW_FRAME_FREG8 = 40,
-    DW_FRAME_FREG9 = 41,
-    DW_FRAME_FREG10 = 42,
-    DW_FRAME_FREG11 = 43,
-    DW_FRAME_FREG12 = 44,
-    DW_FRAME_FREG13 = 45,
-    DW_FRAME_FREG14 = 46,
-    DW_FRAME_FREG15 = 47,
-    DW_FRAME_FREG16 = 48,
-    DW_FRAME_FREG17 = 49,
-    DW_FRAME_FREG18 = 50,
-    DW_FRAME_FREG19 = 51,
-    DW_FRAME_FREG20 = 52,
-    DW_FRAME_FREG21 = 53,
-    DW_FRAME_FREG22 = 54,
-    DW_FRAME_FREG23 = 55,
-    DW_FRAME_FREG24 = 56,
-    DW_FRAME_FREG25 = 57,
-    DW_FRAME_FREG26 = 58,
-    DW_FRAME_FREG27 = 59,
-    DW_FRAME_FREG28 = 60,
-    DW_FRAME_FREG29 = 61,
-    DW_FRAME_FREG30 = 62,
-    DW_FRAME_FREG31 = 63,
-    DW_FRAME_RA_COL = 64,
-    DW_FRAME_STATIC_LINK = 65
-  };
-
-/* This is the number of columns in the Frame Table. */
-#define DW_FRAME_LAST_REG_NUM   66
-
-
-
 #define DW_CHILDREN_no		     0x00
 #define DW_CHILDREN_yes		     0x01
 
@@ -605,7 +529,7 @@ enum dwarf_source_language
 #define DW_LANG_lo_user 0x8000	/* implementation-defined range start */
 #define DW_LANG_hi_user 0xffff	/* implementation-defined range start */
 
-/* Names and codes for GNU "macinfo" extension.  */
+/* Names and codes for macro information.  */
 
 enum dwarf_macinfo_record_type
   {
@@ -613,5 +537,5 @@ enum dwarf_macinfo_record_type
     DW_MACINFO_undef = 2,
     DW_MACINFO_start_file = 3,
     DW_MACINFO_end_file = 4,
-    DW_MACINFO_vend_ext = 255
+    DW_MACINFO_vendor_ext = 255
   };

gcc/dwarf2out.c

@@ -310,9 +310,19 @@ extern char *language_string;
 #define DWARF_ARANGES_HEADER_SIZE \
   (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, PTR_SIZE * 2) - DWARF_OFFSET_SIZE)
 
-/* Fixed size portion of the Common Information Entry (including
-   the length field).  */
-#define DWARF_CIE_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 8)
+/* Length of the target-dependent instructions in the
+   Common Information Entry (CIE).
+   ??? This should be computed when the frame info is genericized.  */
+#ifdef MIPS_DEBUGGING_INFO
+#define DWARF_CIE_INSN_SIZE (2*3)
+#endif
+
+#ifndef DWARF_CIE_INSN_SIZE
+#define DWARF_CIE_INSN_SIZE 0
+#endif
+
+/* Fixed size portion of the CIE (including the length field).  */
+#define DWARF_CIE_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 5 + DWARF_CIE_INSN_SIZE)
 
 /* Fixed size of the Common Information Entry in the call frame
    information (.debug_frame) section rounded up to a word boundary.  */
@@ -828,6 +838,17 @@ char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
   while (0)
 #endif
 
+/* The DWARF 2 CFA column which tracks the return address.  Normally this
+   is the first column after all of the hard registers.  */
+#ifndef DWARF_FRAME_RETURN_COLUMN
+#define DWARF_FRAME_RETURN_COLUMN 	FIRST_PSEUDO_REGISTER
+#endif
+
+/* The mapping from gcc register number to DWARF 2 CFA column number.  By
+   default, we provide columns for all registers after the CFA column.  */
+#ifndef DWARF_FRAME_REGNUM
+#define DWARF_FRAME_REGNUM(REG) (DBX_REGISTER_NUMBER (REG) + 1)
+#endif
 
 /************************ general utility functions **************************/
 
@@ -3920,7 +3941,7 @@ output_call_frame_info ()
 	       ASM_COMMENT_START);
     }
   fputc ('\n', asm_out_file);
-  ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_FRAME_RA_COL);
+  ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_FRAME_RETURN_COLUMN);
   if (flag_verbose_asm)
     {
       fprintf (asm_out_file, "\t%s CIE RA Column",
@@ -3932,12 +3953,21 @@ output_call_frame_info ()
 
 #ifdef MIPS_DEBUGGING_INFO
 
-  /* Set the RA on entry to be the contents of r31.  */
   bzero (&cfi_node, sizeof (dw_cfi_node));
   cfi = &cfi_node;
+
+  /* On entry, the Call Frame Address is in the stack pointer register.  */
+  cfi->dw_cfi_opc = DW_CFA_def_cfa;
+  cfi->dw_cfi_oprnd1.dw_cfi_reg_num
+    = DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM);
+  cfi->dw_cfi_oprnd2.dw_cfi_offset = 0;
+  output_cfi (cfi);
+
+  /* Set the RA on entry to be the contents of r31.  */
   cfi->dw_cfi_opc = DW_CFA_register;
-  cfi->dw_cfi_oprnd1.dw_cfi_reg_num = DW_FRAME_RA_COL;
-  cfi->dw_cfi_oprnd2.dw_cfi_reg_num = DW_FRAME_REG31;
+  cfi->dw_cfi_oprnd1.dw_cfi_reg_num = DWARF_FRAME_RETURN_COLUMN;
+  cfi->dw_cfi_oprnd2.dw_cfi_reg_num
+    = DWARF_FRAME_REGNUM (GP_REG_FIRST + 31);
   output_cfi (cfi);
 
 #endif
@@ -7654,27 +7684,19 @@ dwarf2out_begin_function ()
 
 #ifdef MIPS_DEBUGGING_INFO
 
-  /* On entry, the Call Frame Address is in the stack pointer register.  */
-  cfi = new_cfi ();
-  cfi->dw_cfi_opc = DW_CFA_def_cfa;
-  cfi->dw_cfi_oprnd1.dw_cfi_reg_num
-    = DBX_REGISTER_NUMBER (STACK_POINTER_REGNUM);
-  cfi->dw_cfi_oprnd2.dw_cfi_offset = 0;
-  add_cfi (&fde->dw_fde_cfi, cfi);
-
   /* Set the location counter to the end of the function prolog.  */
   cfi = new_cfi ();
   cfi->dw_cfi_opc = DW_CFA_advance_loc4;
   cfi->dw_cfi_oprnd1.dw_cfi_addr = xstrdup (label);
   add_cfi (&fde->dw_fde_cfi, cfi);
 
-  /* Define the CFA as either an explicit frame pointer register,
-     or an offset from the stack pointer.  */
+  /* Define the CFA as an offset from either the frame pointer
+     or the stack pointer.  */
   cfi = new_cfi ();
   cfi->dw_cfi_opc = DW_CFA_def_cfa;
   cfi->dw_cfi_oprnd1.dw_cfi_reg_num
-    = DBX_REGISTER_NUMBER (frame_pointer_needed ? FRAME_POINTER_REGNUM
-			   : STACK_POINTER_REGNUM);
+    = DWARF_FRAME_REGNUM (frame_pointer_needed ? FRAME_POINTER_REGNUM
+			  : STACK_POINTER_REGNUM);
   offset = current_frame_info.total_size;
   cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
   add_cfi (&fde->dw_fde_cfi, cfi);
@@ -7690,9 +7712,9 @@ dwarf2out_begin_function ()
       cfi = new_cfi ();
       cfi->dw_cfi_opc = DW_CFA_register;
       cfi->dw_cfi_oprnd1.dw_cfi_reg_num
-	= DBX_REGISTER_NUMBER (STACK_POINTER_REGNUM);
+	= DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM);
       cfi->dw_cfi_oprnd2.dw_cfi_reg_num
-	= DBX_REGISTER_NUMBER (FRAME_POINTER_REGNUM);
+	= DWARF_FRAME_REGNUM (FRAME_POINTER_REGNUM);
       add_cfi (&fde->dw_fde_cfi, cfi);
     }
 
@@ -7703,7 +7725,7 @@ dwarf2out_begin_function ()
       assert (offset >= 0);
       cfi = new_cfi ();
       cfi->dw_cfi_opc = DW_CFA_offset_extended;
-      cfi->dw_cfi_oprnd1.dw_cfi_reg_num = DW_FRAME_RA_COL;
+      cfi->dw_cfi_oprnd1.dw_cfi_reg_num = DWARF_FRAME_RETURN_COLUMN;
       cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
       add_cfi (&fde->dw_fde_cfi, cfi);
     }
@@ -7718,7 +7740,7 @@ dwarf2out_begin_function ()
       cfi = new_cfi ();
       cfi->dw_cfi_opc = DW_CFA_offset;
       cfi->dw_cfi_oprnd1.dw_cfi_reg_num
-	= DBX_REGISTER_NUMBER (FRAME_POINTER_REGNUM);
+	= DWARF_FRAME_REGNUM (FRAME_POINTER_REGNUM);
       cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
       add_cfi (&fde->dw_fde_cfi, cfi);
     }