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[/] [or1k/] [trunk/] [insight/] [gdb/] [ia64-aix-tdep.c] - Blame information for rev 1765

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1 578 markom
/* Target-dependent code for the IA-64 for GDB, the GNU debugger.
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   Copyright 2000, 2001
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   Free Software Foundation, Inc.
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   This file is part of GDB.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 2 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 59 Temple Place - Suite 330,
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   Boston, MA 02111-1307, USA.  */
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#include "defs.h"
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/* External hook for finding gate addresses on AIX.  */
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void (*aix5_find_gate_addresses_hook) (CORE_ADDR *, CORE_ADDR *) = 0;
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/* Offset to sc_context member of sigcontext structure from frame of handler */
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#define IA64_AIX_SIGCONTEXT_OFFSET 64
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/* Return a non-zero value iff PC is in a signal trampoline.  On
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   AIX, we determine this by seeing if the pc is in a special
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   execute only page called the ``gate page''.  The addresses in
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   question are determined by letting the AIX native portion of
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   the code determine these addresses via its own nefarious
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   means.  */
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int
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ia64_aix_in_sigtramp (CORE_ADDR pc, char *func_name)
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{
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  CORE_ADDR gate_area_start, gate_area_end;
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  if (aix5_find_gate_addresses_hook == 0)
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    return 0;
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  (*aix5_find_gate_addresses_hook) (&gate_area_start, &gate_area_end);
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  return (pc >=  gate_area_start && pc < gate_area_end);
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}
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/* IA-64 AIX specific function which, given a frame address and
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   a register number, returns the address at which that register may be
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   found.  0 is returned for registers which aren't stored in the
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   sigcontext structure.  */
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CORE_ADDR
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ia64_aix_sigcontext_register_address (CORE_ADDR sp, int regno)
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{
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  /* The hardcoded offsets that follow are actually offsets to the
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     corresponding members in struct __context in
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     /usr/include/sys/context.h (on an IA-64 AIX5 box).  */
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  if (IA64_GR0_REGNUM <= regno && regno <= IA64_GR31_REGNUM)
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    return sp + IA64_AIX_SIGCONTEXT_OFFSET + 152 + 8 * (regno - IA64_GR0_REGNUM);
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  else if (IA64_BR0_REGNUM <= regno && regno <= IA64_BR7_REGNUM)
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    return sp + IA64_AIX_SIGCONTEXT_OFFSET + 408 + 8 * (regno - IA64_BR0_REGNUM);
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  else if (IA64_FR0_REGNUM <= regno && regno <= IA64_FR127_REGNUM)
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    return sp + IA64_AIX_SIGCONTEXT_OFFSET + 480 + 16 * (regno - IA64_FR0_REGNUM);
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  else
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    switch (regno)
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      {
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      case IA64_PSR_REGNUM :
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        return sp + IA64_AIX_SIGCONTEXT_OFFSET + 0;
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      case IA64_IP_REGNUM :
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        return sp + IA64_AIX_SIGCONTEXT_OFFSET + 8;
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      /* iipa is at 16.
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         isr is at 24.
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         ifa is at 32.
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         iim is at 40. */
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      case IA64_CFM_REGNUM :
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        return sp + IA64_AIX_SIGCONTEXT_OFFSET + 48;  /* ifs, actually */
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      case IA64_RSC_REGNUM :
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        return sp + IA64_AIX_SIGCONTEXT_OFFSET + 56;
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      case IA64_BSP_REGNUM :
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        return sp + IA64_AIX_SIGCONTEXT_OFFSET + 64;
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      case IA64_BSPSTORE_REGNUM :
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        return sp + IA64_AIX_SIGCONTEXT_OFFSET + 72;
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      case IA64_RNAT_REGNUM :
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        return sp + IA64_AIX_SIGCONTEXT_OFFSET + 80;
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      case IA64_PFS_REGNUM :
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        return sp + IA64_AIX_SIGCONTEXT_OFFSET + 88;
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      case IA64_UNAT_REGNUM :
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        return sp + IA64_AIX_SIGCONTEXT_OFFSET + 96;
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      case IA64_PR_REGNUM :
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        return sp + IA64_AIX_SIGCONTEXT_OFFSET + 104;
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      case IA64_CCV_REGNUM :
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        return sp + IA64_AIX_SIGCONTEXT_OFFSET + 112;
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      case IA64_LC_REGNUM :
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        return sp + IA64_AIX_SIGCONTEXT_OFFSET + 120;
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      case IA64_EC_REGNUM :
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        return sp + IA64_AIX_SIGCONTEXT_OFFSET + 128;
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      /* nats is at 136; this is an address independent NaT bitmask */
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      case IA64_FPSR_REGNUM :
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        return sp + IA64_AIX_SIGCONTEXT_OFFSET + 144;
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      default :
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        return 0;
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      }
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}

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