include/libunwind-ia64.h

/* libunwind - a platform-independent unwind library
   Copyright (C) 2001-2002 Hewlett-Packard Co
	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>

This file is part of libunwind.

libunwind 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, or (at your option)
any later version.

libunwind 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 GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.

As a special exception, if you link this library with other files to
produce an executable, this library does not by itself cause the
resulting executable to be covered by the GNU General Public License.
This exception does not however invalidate any other reasons why the
executable file might be covered by the GNU General Public
License.  */

#include <ucontext.h>

typedef uint64_t unw_tdep_word_t;

typedef enum
  {
    /* Note: general registers are excepted to start with index 0.
       This convention facilitates architecture-independent
       implementation of the C++ exception handling ABI.  See
       _Unwind_SetGR() and _Unwind_GetGR() for details.  */
    UNW_IA64_GR = 0,			/* general registers (r0..r127) */
     UNW_IA64_GP = UNW_IA64_GR + 1,
     UNW_IA64_TP = UNW_IA64_GR + 13,

    UNW_IA64_NAT = UNW_IA64_GR + 128,	/* NaT registers (nat0..nat127) */

    UNW_IA64_FR = UNW_IA64_NAT + 128,	/* fp registers (f0..f127) */

    UNW_IA64_AR = UNW_IA64_FR + 128,	/* application registers (ar0..r127) */
     UNW_IA64_AR_RSC = UNW_IA64_AR + 16,
     UNW_IA64_AR_BSP = UNW_IA64_AR + 17,
     UNW_IA64_AR_BSPSTORE = UNW_IA64_AR + 18,
     UNW_IA64_AR_RNAT = UNW_IA64_AR + 19,
     UNW_IA64_AR_25 = UNW_IA64_AR + 25,	/* reserved (scratch) */
     UNW_IA64_AR_26 = UNW_IA64_AR + 26,	/* reserved (scratch) */
     UNW_IA64_AR_CCV = UNW_IA64_AR + 32,
     UNW_IA64_AR_UNAT = UNW_IA64_AR + 36,
     UNW_IA64_AR_FPSR = UNW_IA64_AR + 40,
     UNW_IA64_AR_PFS = UNW_IA64_AR + 64,
     UNW_IA64_AR_LC = UNW_IA64_AR + 65,
     UNW_IA64_AR_EC = UNW_IA64_AR + 66,

    UNW_IA64_BR = UNW_IA64_AR + 128,	/* branch registers (b0..p7) */
    UNW_IA64_PR = UNW_IA64_BR + 8,	/* predicate registers (p0..p63) */
    UNW_IA64_CFM,

    /* frame info (read-only): */
    UNW_IA64_BSP,
    UNW_IA64_IP,
    UNW_IA64_SP,
    UNW_IA64_PROC_START,
    UNW_IA64_HANDLER,
    UNW_IA64_LSDA,

    UNW_TDEP_LAST_REG = UNW_IA64_LSDA,

    UNW_TDEP_IP = UNW_IA64_IP,
    UNW_TDEP_SP = UNW_IA64_SP,
    UNW_TDEP_PROC_START = UNW_IA64_PROC_START,
    UNW_TDEP_HANDLER = UNW_IA64_HANDLER,
    UNW_TDEP_LSDA = UNW_IA64_LSDA,
  }
ia64_regnum_t;

/* Info needed for a single IA-64 unwind.  A pointer to this structure
   is expected in the acquire/release callbacks of the unwind
   accessors.  */
typedef struct unw_ia64_table
  {
    const char *name;		/* table name (or NULL if none) */
    unw_tdep_word_t segbase;	/* base for offsets in the unwind table */
    unw_tdep_word_t start;	/* starting IP covered by table */
    unw_tdep_word_t end;	/* first IP _not_ covered table */
    unw_tdep_word_t gp;		/* global pointer for this load-module */
    unw_tdep_word_t length;	/* number of entries in unwind table array */

    /* Pointer to local copy of the unwind descriptor table: */
    void *array;

    /* Local copy of the unwind descriptor information.  This is
       initialized such that adding the unwind entry's info_offset
       yields the address at which the corresponding descriptors can
       be found.  */
    const unsigned char *unwind_info_base;
  }
unw_ia64_table_t;

typedef struct unw_tdep_save_loc
  {
    /* Additional target-dependent info on a save location.  On IA-64,
       we could use this to specify the bit number in which a NaT bit
       gets saved.  For now, nobody wants to know this, so it's not
       currently implemented.  */
  }
unw_tdep_save_loc_t;

/* On IA-64, we can directly use ucontext_t as the unwind context.  */
typedef ucontext_t unw_tdep_context_t;

/* XXX this is not ideal: an application should not be prevented from
   using the "getcontext" name just because it's using libunwind.  We
   can't just use __getcontext() either, because that isn't exported
   by glibc...  */
#define unw_tdep_getcontext(uc)		getcontext(uc)