* gdb/config/pa/tm-hppa.h (ABOUT_TO_RETURN): Handle a return

	which nullifies the following instruction.  (From law@cs.utah.edu).

1 files changed, 565 insertions, 0 deletions

diff --git a/gdb/config/pa/tm-hppa.h b/gdb/config/pa/tm-hppa.h
new file mode 100644
index 0000000..deec76d
--- /dev/null
+++ b/gdb/config/pa/tm-hppa.h
@@ -0,0 +1,565 @@
+/* Parameters for execution on any Hewlett-Packard PA-RISC machine.
+   Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993
+   Free Software Foundation, Inc. 
+
+   Contributed by the Center for Software Science at the
+   University of Utah (pa-gdb-bugs@cs.utah.edu).
+
+This file is part of GDB.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* Target system byte order. */
+
+#define	TARGET_BYTE_ORDER	BIG_ENDIAN
+
+/* Get at various relevent fields of an instruction word. */
+
+#define MASK_5 0x1f
+#define MASK_11 0x7ff
+#define MASK_14 0x3fff
+#define MASK_21 0x1fffff
+
+/* This macro gets bit fields using HP's numbering (MSB = 0) */
+
+#define GET_FIELD(X, FROM, TO) \
+  ((X) >> 31 - (TO) & (1 << ((TO) - (FROM) + 1)) - 1)
+
+/* Watch out for NaNs */
+
+#define IEEE_FLOAT
+
+/* When passing a structure to a function, GCC passes the address
+   in a register, not the structure itself. */
+
+#define REG_STRUCT_HAS_ADDR(gcc_p) (1)
+
+/* Groan */
+
+#define	ARGS_GROW_DOWN
+
+/* Offset from address of function to start of its code.
+   Zero on most machines.  */
+
+#define FUNCTION_START_OFFSET 0
+     
+/* Advance PC across any function entry prologue instructions
+   to reach some "real" code.  */
+
+/* skip (stw rp, -20(0,sp)); copy 4,1; copy sp, 4; stwm 1,framesize(sp) 
+   for gcc, or (stw rp, -20(0,sp); stwm 1, framesize(sp) for hcc */
+
+#define SKIP_PROLOGUE(pc) pc = skip_prologue (pc)
+
+/* If PC is in some function-call trampoline code, return the PC
+   where the function itself actually starts.  If not, return NULL.  */
+
+#define	SKIP_TRAMPOLINE_CODE(pc) skip_trampoline_code (pc, NULL)
+
+/* Return non-zero if we are in some sort of a trampoline. */
+
+#define IN_SOLIB_TRAMPOLINE(pc, name) skip_trampoline_code (pc, name)
+
+/* Immediately after a function call, return the saved pc.
+   Can't go through the frames for this because on some machines
+   the new frame is not set up until the new function executes
+   some instructions.  */
+
+#define SAVED_PC_AFTER_CALL(frame) (read_register (RP_REGNUM) & ~3)
+
+/* Address of end of stack space. Who knows.  */
+
+#define STACK_END_ADDR 0x80000000
+
+/* Stack grows upward */
+
+#define INNER_THAN >
+
+
+/* Sequence of bytes for breakpoint instruction.  */
+
+/*#define BREAKPOINT {0x00, 0x00, 0x00, 0x00}*/
+#ifdef	KERNELDEBUG	/* XXX */
+#define BREAKPOINT {0x00, 0x00, 0xa0, 0x00}
+#else
+#define BREAKPOINT {0x00, 0x01, 0x00, 0x04}
+#endif
+
+/* Amount PC must be decremented by after a breakpoint.
+   This is often the number of bytes in BREAKPOINT
+   but not always.
+
+   Not on the PA-RISC */
+
+#define DECR_PC_AFTER_BREAK 0
+
+/* return instruction is bv r0(rp) or bv,n r0(rp)*/
+
+#define ABOUT_TO_RETURN(pc) ((read_memory_integer (pc, 4) | 0x2) == 0xE840C002)
+
+/* Return 1 if P points to an invalid floating point value.  */
+
+#define INVALID_FLOAT(p, len) 0   /* Just a first guess; not checked */
+
+/* Largest integer type */
+#define LONGEST long
+
+/* Name of the builtin type for the LONGEST type above. */
+#define BUILTIN_TYPE_LONGEST builtin_type_long
+
+/* Say how long (ordinary) registers are.  */
+
+#define REGISTER_TYPE long
+
+/* Number of machine registers */
+
+#define NUM_REGS 100
+
+/* Initializer for an array of names of registers.
+   There should be NUM_REGS strings in this initializer.  */
+
+#define REGISTER_NAMES	\
+ {"flags", "r1", "rp", "r3", "r4", "r5", "r6", "r7", "r8", "r9",	\
+  "r10", "r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18", "r19",	\
+  "r20", "r21", "r22", "arg3", "arg2", "arg1", "arg0", "dp", "ret0", "ret1", \
+  "sp", "r31", "sar", "pcoqh", "pcsqh", "pcoqt", "pcsqt", \
+  "eiem", "iir", "isr", "ior", "ipsw", "goto", "sr4", "sr0", "sr1", "sr2", \
+  "sr3", "sr5", "sr6", "sr7", "cr0", "cr8", "cr9", "ccr", "cr12", "cr13", \
+  "cr24", "cr25", "cr26", "mpsfu_high", "mpsfu_low", "mpsfu_ovflo", "pad", \
+  "fpsr", "fpe1", "fpe2", "fpe3", "fpe4", "fpe5", "fpe6", "fpe7", \
+  "fp4", "fp5", "fp6", "fp7", "fp8", \
+  "fp9", "fp10", "fp11", "fp12", "fp13", "fp14", "fp15", \
+  "fp16", "fp17", "fp18", "fp19", "fp20", "fp21", "fp22", "fp23", \
+  "fp24", "fp25", "fp26", "fp27", "fp28", "fp29", "fp30", "fp31"}
+
+/* Register numbers of various important registers.
+   Note that some of these values are "real" register numbers,
+   and correspond to the general registers of the machine,
+   and some are "phony" register numbers which are too large
+   to be actual register numbers as far as the user is concerned
+   but do serve to get the desired values when passed to read_register.  */
+
+#define FLAGS_REGNUM 0		/* Various status flags */
+#define RP_REGNUM 2		/* return pointer */
+#define FP_REGNUM 4		/* Contains address of executing stack */
+				/* frame */
+#define SP_REGNUM 30		/* Contains address of top of stack */
+#define SAR_REGNUM 32		/* shift amount register */
+#define IPSW_REGNUM 41		/* processor status word. ? */
+#define PCOQ_HEAD_REGNUM 33	/* instruction offset queue head */
+#define PCSQ_HEAD_REGNUM 34	/* instruction space queue head */
+#define PCOQ_TAIL_REGNUM 35	/* instruction offset queue tail */
+#define PCSQ_TAIL_REGNUM 36	/* instruction space queue tail */
+#define FP0_REGNUM 64		/* floating point reg. 0 */
+#define FP4_REGNUM 72
+
+/* compatibility with the rest of gdb. */
+#define PC_REGNUM PCOQ_HEAD_REGNUM
+#define NPC_REGNUM PCOQ_TAIL_REGNUM
+
+/* When fetching register values from an inferior or a core file,
+   clean them up using this macro.  BUF is a char pointer to
+   the raw value of the register in the registers[] array.  */
+
+#define	CLEAN_UP_REGISTER_VALUE(regno, buf) \
+  do {	\
+    if ((regno) == PCOQ_HEAD_REGNUM || (regno) == PCOQ_TAIL_REGNUM) \
+      (buf)[3] &= ~0x3;	\
+  } while (0)
+
+/* Define DO_REGISTERS_INFO() to do machine-specific formatting
+   of register dumps. */
+
+#define DO_REGISTERS_INFO(_regnum, fp) pa_do_registers_info (_regnum, fp)
+
+/* PA specific macro to see if the current instruction is nullified. */
+#define INSTRUCTION_NULLIFIED ((int)read_register (IPSW_REGNUM) & 0x00200000)
+
+/* Total amount of space needed to store our copies of the machine's
+   register state, the array `registers'.  */
+#define REGISTER_BYTES (32 * 4 + 11 * 4 + 8 * 4 + 12 * 4 + 4 + 32 * 8)
+
+/* Index within `registers' of the first byte of the space for
+   register N.  */
+
+#define REGISTER_BYTE(N) \
+ ((N) >= FP4_REGNUM ? ((N) - FP4_REGNUM) * 8 + 288 : (N) * 4)
+
+/* Number of bytes of storage in the actual machine representation
+   for register N.  On the PA-RISC, all regs are 4 bytes
+   except the floating point regs which are 8 bytes.  */
+
+#define REGISTER_RAW_SIZE(N) ((N) < FP4_REGNUM ? 4 : 8)
+
+/* Number of bytes of storage in the program's representation
+   for register N. */
+
+#define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N)
+
+/* Largest value REGISTER_RAW_SIZE can have.  */
+
+#define MAX_REGISTER_RAW_SIZE 8
+
+/* Largest value REGISTER_VIRTUAL_SIZE can have.  */
+
+#define MAX_REGISTER_VIRTUAL_SIZE 8
+
+/* Nonzero if register N requires conversion
+   from raw format to virtual format.  */
+
+#define REGISTER_CONVERTIBLE(N) 0
+
+/* Convert data from raw format for register REGNUM
+   to virtual format for register REGNUM.  */
+
+#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM, FROM, TO) \
+{ memcpy ((TO), (FROM), (REGNUM) < FP4_REGNUM ? 4 : 8); }
+
+/* Convert data from virtual format for register REGNUM
+   to raw format for register REGNUM.  */
+
+#define REGISTER_CONVERT_TO_RAW(REGNUM, FROM, TO) \
+{ memcpy ((TO), (FROM), (REGNUM) < FP4_REGNUM ? 4 : 8); }
+
+/* Return the GDB type object for the "standard" data type
+   of data in register N.  */
+
+#define REGISTER_VIRTUAL_TYPE(N) \
+ ((N) < FP4_REGNUM ? builtin_type_int : builtin_type_double)
+
+/* Store the address of the place in which to copy the structure the
+   subroutine will return.  This is called from call_function. */
+
+#define STORE_STRUCT_RETURN(ADDR, SP) {write_register (28, (ADDR)); }
+
+/* Extract from an array REGBUF containing the (raw) register state
+   a function return value of type TYPE, and copy that, in virtual format,
+   into VALBUF.  */
+
+#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
+  bcopy ((REGBUF) + REGISTER_BYTE(TYPE_LENGTH(TYPE) > 4 ? \
+        FP4_REGNUM :28), VALBUF, TYPE_LENGTH (TYPE))
+
+/* Write into appropriate registers a function return value
+   of type TYPE, given in virtual format.  */
+
+#define STORE_RETURN_VALUE(TYPE,VALBUF) \
+  write_register_bytes (TYPE_LENGTH(TYPE) > 4 ? FP4_REGNUM :28,		\
+			VALBUF, TYPE_LENGTH (TYPE))
+
+/* Extract from an array REGBUF containing the (raw) register state
+   the address in which a function should return its structure value,
+   as a CORE_ADDR (or an expression that can be used as one).  */
+
+#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(int *)((REGBUF) + 28))
+
+/*
+ * This macro defines the register numbers (from REGISTER_NAMES) that
+ * are effectively unavailable to the user through ptrace().  It allows
+ * us to include the whole register set in REGISTER_NAMES (inorder to
+ * better support remote debugging).  If it is used in
+ * fetch/store_inferior_registers() gdb will not complain about I/O errors
+ * on fetching these registers.  If all registers in REGISTER_NAMES
+ * are available, then return false (0).
+ */
+
+#define CANNOT_STORE_REGISTER(regno)            \
+                   ((regno) == 0) ||     \
+                   ((regno) == PCSQ_HEAD_REGNUM) || \
+                   ((regno) >= PCSQ_TAIL_REGNUM && (regno) < IPSW_REGNUM) ||  \
+                   ((regno) > IPSW_REGNUM && (regno) < FP4_REGNUM)
+
+#define INIT_EXTRA_FRAME_INFO(fromleaf, frame) init_extra_frame_info (fromleaf, frame)
+
+/* Describe the pointer in each stack frame to the previous stack frame
+   (its caller).  */
+
+/* FRAME_CHAIN takes a frame's nominal address
+   and produces the frame's chain-pointer.
+
+   FRAME_CHAIN_COMBINE takes the chain pointer and the frame's nominal address
+   and produces the nominal address of the caller frame.
+
+   However, if FRAME_CHAIN_VALID returns zero,
+   it means the given frame is the outermost one and has no caller.
+   In that case, FRAME_CHAIN_COMBINE is not used.  */
+
+/* In the case of the PA-RISC, the frame's nominal address
+   is the address of a 4-byte word containing the calling frame's
+   address (previous FP).  */
+
+#define FRAME_CHAIN(thisframe) frame_chain (thisframe)
+
+#define FRAME_CHAIN_VALID(chain, thisframe) \
+  frame_chain_valid (chain, thisframe)
+
+#define FRAME_CHAIN_COMBINE(chain, thisframe) (chain)
+
+/* Define other aspects of the stack frame.  */
+
+/* A macro that tells us whether the function invocation represented
+   by FI does not have a frame on the stack associated with it.  If it
+   does not, FRAMELESS is set to 1, else 0.  */
+#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
+  (FRAMELESS) = frameless_look_for_prologue(FI)
+
+#define FRAME_SAVED_PC(FRAME) frame_saved_pc (FRAME)
+
+#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
+
+#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
+/* Set VAL to the number of args passed to frame described by FI.
+   Can set VAL to -1, meaning no way to tell.  */
+
+/* We can't tell how many args there are
+   now that the C compiler delays popping them.  */
+#define FRAME_NUM_ARGS(val,fi) (val = -1)
+
+/* Return number of bytes at start of arglist that are not really args.  */
+
+#define FRAME_ARGS_SKIP 0
+
+/* Put here the code to store, into a struct frame_saved_regs,
+   the addresses of the saved registers of frame described by FRAME_INFO.
+   This includes special registers such as pc and fp saved in special
+   ways in the stack frame.  sp is even more special:
+   the address we return for it IS the sp for the next frame.  */
+
+/* Deal with dummy functions later. */
+
+#define STW_P(INSN) (((INSN) & 0xfc000000) == 0x68000000)
+#define ADDIL_P(INSN) (((INSN) & 0xfc000000) == 0x28000000)
+#define LDO_P(INSN) (((INSN) & 0xfc00c000) == 0x34000000)
+
+#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs)		\
+{ register int regnum;							\
+  register CORE_ADDR next_addr;						\
+  register CORE_ADDR pc;						\
+  unsigned this_insn;							\
+  unsigned address;							\
+									\
+  bzero (&frame_saved_regs, sizeof frame_saved_regs);			\
+  if ((frame_info->pc >= (frame_info)->frame                            \
+       && (frame_info)->pc <= ((frame_info)->frame + CALL_DUMMY_LENGTH  \
+			       + 32 * 4 + (NUM_REGS - FP0_REGNUM) * 8   \
+			       + 6 * 4)))                               \
+    find_dummy_frame_regs ((frame_info), &(frame_saved_regs));		\
+  else									\
+    { pc = get_pc_function_start ((frame_info)->pc);			\
+      if (read_memory_integer (pc, 4) == 0x6BC23FD9)			\
+	{ (frame_saved_regs).regs[RP_REGNUM] = (frame_info)->frame - 20;\
+	  pc = pc + 4;							\
+	}								\
+      if (read_memory_integer (pc, 4) != 0x8040241) goto lose;		\
+      pc += 8;			/* skip "copy 4,1; copy 30, 4" */	\
+      /* skip either "stw 1,0(4);addil L'fsize,30;ldo R'fsize(1),30"	\
+	 or "stwm 1,fsize(30)" */					\
+      if ((read_memory_integer (pc, 4) & ~MASK_14) == 0x68810000)	\
+	pc += 12;							\
+      else								\
+	pc += 4;							\
+      while (1)								\
+	{ this_insn = read_memory_integer(pc, 4);			\
+	  if (STW_P (this_insn)) /* stw */				\
+	    { regnum = GET_FIELD (this_insn, 11, 15);			\
+	      if (!regnum) goto lose;					\
+	      (frame_saved_regs).regs[regnum] = (frame_info)->frame +	\
+		extract_14 (this_insn);					\
+	      pc += 4;							\
+	    }								\
+	  else if (ADDIL_P (this_insn)) /* addil */			\
+	    { int next_insn;						\
+	      next_insn = read_memory_integer(pc + 4, 4);		\
+	      if (STW_P (next_insn)) /* stw */				\
+		{ regnum = GET_FIELD (this_insn, 6, 10);		\
+		  if (!regnum) goto lose;				\
+		  (frame_saved_regs).regs[regnum] = (frame_info)->frame +\
+		    (extract_21 (this_insn) << 11) + extract_14 (next_insn);\
+		  pc += 8;						\
+		}							\
+	      else							\
+		break;							\
+	    }								\
+	  else								\
+	    { pc += 4;							\
+	      break;							\
+	    }								\
+	}								\
+      this_insn = read_memory_integer (pc, 4);				\
+      if (LDO_P (this_insn))						\
+	{ next_addr = (frame_info)->frame + extract_14 (this_insn);	\
+	  pc += 4;							\
+	}								\
+      else if (ADDIL_P (this_insn))					\
+	{ next_addr = (frame_info)->frame + (extract_21 (this_insn) << 11)\
+	    + extract_14 (read_memory_integer (pc + 4, 4));		\
+	    pc += 8;							\
+	  }								\
+      while (1)								\
+	{ this_insn = read_memory_integer (pc, 4);			\
+	  if ((this_insn & 0xfc001fe0) == 0x2c001220) /* fstds,ma */	\
+	    { regnum = GET_FIELD (this_insn, 27, 31);			\
+	      (frame_saved_regs).regs[regnum + FP0_REGNUM] = next_addr;	\
+	      next_addr += 8;						\
+              pc += 4;                                                  \
+	    }								\
+	  else								\
+	    break;							\
+	}								\
+    lose:								\
+      (frame_saved_regs).regs[FP_REGNUM] = (frame_info)->frame;		\
+      (frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame -4;	\
+    }}
+
+/* Things needed for making the inferior call functions.  */
+
+/* Push an empty stack frame, to record the current PC, etc. */
+
+#define PUSH_DUMMY_FRAME push_dummy_frame ()
+
+/* Discard from the stack the innermost frame, 
+   restoring all saved registers.  */
+#define POP_FRAME  hppa_pop_frame ()
+
+/* This sequence of words is the instructions
+
+; Call stack frame has already been built by gdb. Since we could be calling 
+; a varargs function, and we do not have the benefit of a stub to put things in
+; the right place, we load the first 4 word of arguments into both the general
+; and fp registers.
+call_dummy
+	ldw -36(sp), arg0
+	ldw -40(sp), arg1
+	ldw -44(sp), arg2
+	ldw -48(sp), arg3
+	ldo -36(sp), r1
+	fldws 0(0, r1), fr4
+	fldds -4(0, r1), fr5
+	fldws -8(0, r1), fr6
+	fldds -12(0, r1), fr7
+	ldil 0, r22			; target will be placed here.
+	ldo 0(r22), r22
+	ldsid (0,r22), r3
+	ldil 0, r1			; _sr4export will be placed here.
+	ldo 0(r1), r1
+	ldsid (0,r1), r19
+	combt,=,n r3, r19, text_space	; If target is in data space, do a
+	ble 0(sr5, r22)			; "normal" procedure call
+	copy r31, r2
+	break 4, 8 
+	mtsp r21, sr0
+	ble,n 0(sr0, r22)
+text_space				; Otherwise, go through _sr4export,
+	ble (sr4, r1)			; which will return back here.
+	stw 31,-24(r30)
+	break 4, 8
+	mtsp r21, sr0
+	ble,n 0(sr0, r22)
+
+   The dummy decides if the target is in text space or data space. If
+   it's in data space, there's no problem because the target can
+   return back to the dummy. However, if the target is in text space,
+   the dummy calls the secret, undocumented routine _sr4export, which
+   calls a function in text space and can return to any space. Instead
+   of including fake instructions to represent saved registers, we
+   know that the frame is associated with the call dummy and treat it
+   specially. */ 
+
+#define CALL_DUMMY {0x4BDA3FB9, 0x4BD93FB1, 0x4BD83FA9, 0x4BD73FA1,\
+                    0x37C13FB9, 0x24201004, 0x2C391005, 0x24311006,\
+                    0x2C291007, 0x22C00000, 0x36D60000, 0x02C010A3,\
+                    0x20200000, 0x34210000, 0x002010b3, 0x82632022,\
+                    0xe6c06000, 0x081f0242, 0x00010004, 0x00151820,\
+                    0xe6c00002, 0xe4202000, 0x6bdf3fd1, 0x00010004,\
+                    0x00151820, 0xe6c00002}
+
+#define CALL_DUMMY_LENGTH 104
+#define CALL_DUMMY_START_OFFSET 0
+
+/*
+ * Insert the specified number of args and function address
+ * into a call sequence of the above form stored at DUMMYNAME.
+ *
+ * On the hppa we need to call the stack dummy through $$dyncall.
+ * Therefore our version of FIX_CALL_DUMMY takes an extra argument,
+ * real_pc, which is the location where gdb should start up the
+ * inferior to do the function call.
+ */
+
+#define FIX_CALL_DUMMY hppa_fix_call_dummy
+
+CORE_ADDR hppa_fix_call_dummy();
+
+#define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
+    sp = hppa_push_arguments(nargs, args, sp, struct_return, struct_addr)
+
+/* Symbol files have two symbol tables.  Rather than do this right,
+   like the ELF symbol reading code, massive hackery was added
+   to dbxread.c and partial-stab.h.  This flag turns on that
+   hackery, which should all go away FIXME FIXME FIXME FIXME now.  */
+
+#define	GDB_TARGET_IS_HPPA
+
+#define BELIEVE_PCC_PROMOTION 1
+
+/*
+ * Unwind table and descriptor.
+ */
+
+struct unwind_table_entry {
+  unsigned int region_start;
+  unsigned int region_end;
+
+  unsigned int Cannot_unwind         :  1;
+  unsigned int Millicode             :  1;
+  unsigned int Millicode_save_sr0    :  1;
+  unsigned int Region_description    :  2;
+  unsigned int reserverd1            :  1;
+  unsigned int Entry_SR              :  1;
+  unsigned int Entry_FR              :  4; /* number saved */
+  unsigned int Entry_GR              :  5; /* number saved */
+  unsigned int Args_stored           :  1;
+  unsigned int Variable_Frame	     :  1;
+  unsigned int Separate_Package_Body :  1;
+  unsigned int Frame_Extension_Millicode:1;
+  unsigned int Stack_Overflow_Check  :  1;
+  unsigned int Two_Instruction_SP_Increment:1;
+  unsigned int Ada_Region	     :  1;
+  unsigned int reserved2	     :  4;
+  unsigned int Save_SP               :  1;
+  unsigned int Save_RP               :  1;
+  unsigned int Save_MRP_in_frame     :  1;
+  unsigned int extn_ptr_defined      :  1;
+  unsigned int Cleanup_defined       :  1;
+
+  unsigned int MPE_XL_interrupt_marker: 1;
+  unsigned int HP_UX_interrupt_marker:  1;
+  unsigned int Large_frame	     :  1;
+  unsigned int reserved4             :  2;
+  unsigned int Total_frame_size      : 27;
+};
+
+/* Info about the unwind table associated with an object file.  This is hung
+   off of the objfile->obj_private pointer, and is allocated in the objfile's
+   psymbol obstack.  This allows us to have unique unwind info for each
+   executable and shared library that we are debugging.  */
+
+struct obj_unwind_info {
+  struct unwind_table_entry *table; /* Pointer to unwind info */
+  struct unwind_table_entry *cache; /* Pointer to last entry we found */
+  int last;			/* Index of last entry */
+};
+
+#define OBJ_UNWIND_INFO(obj) ((struct obj_unwind_info *)obj->obj_private)