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[/] [or1k/] [trunk/] [insight/] [gdb/] [ia64-linux-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
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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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#include "arch-utils.h"
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/* The sigtramp code is in a non-readable (executable-only) region
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   of memory called the ``gate page''.  The addresses in question
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   were determined by examining the system headers.  They are
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   overly generous to allow for different pages sizes. */
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#define GATE_AREA_START 0xa000000000000100LL
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#define GATE_AREA_END   0xa000000000010000LL
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/* Offset to sigcontext structure from frame of handler */
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#define IA64_LINUX_SIGCONTEXT_OFFSET 192
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int
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ia64_linux_in_sigtramp (CORE_ADDR pc, char *func_name)
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{
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  return (pc >= (CORE_ADDR) GATE_AREA_START && pc < (CORE_ADDR) GATE_AREA_END);
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}
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/* IA-64 GNU/Linux 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 the
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   sigcontext structure. */
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CORE_ADDR
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ia64_linux_sigcontext_register_address (CORE_ADDR sp, int regno)
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{
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  if (IA64_GR0_REGNUM <= regno && regno <= IA64_GR31_REGNUM)
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    return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 200 + 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_LINUX_SIGCONTEXT_OFFSET + 136 + 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_LINUX_SIGCONTEXT_OFFSET + 464 + 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_IP_REGNUM :
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        return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 40;
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      case IA64_CFM_REGNUM :
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        return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 48;
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      case IA64_PSR_REGNUM :
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        return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 56;          /* user mask only */
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      /* sc_ar_rsc is provided, from which we could compute bspstore, but
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         I don't think it's worth it.  Anyway, if we want it, it's at offset
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         64 */
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      case IA64_BSP_REGNUM :
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        return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 72;
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      case IA64_RNAT_REGNUM :
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        return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 80;
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      case IA64_CCV_REGNUM :
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        return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 88;
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      case IA64_UNAT_REGNUM :
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        return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 96;
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      case IA64_FPSR_REGNUM :
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        return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 104;
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      case IA64_PFS_REGNUM :
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        return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 112;
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      case IA64_LC_REGNUM :
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        return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 120;
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      case IA64_PR_REGNUM :
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        return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 128;
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      default :
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        return 0;
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      }
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}

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