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/* Target-dependent code for the IA-64 for GDB, the GNU debugger.
Copyright 2000, 2001
Free Software Foundation, Inc.
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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
/* External hook for finding gate addresses on AIX. */
void (*aix5_find_gate_addresses_hook) (CORE_ADDR *, CORE_ADDR *) = 0;
/* Offset to sc_context member of sigcontext structure from frame of handler */
#define IA64_AIX_SIGCONTEXT_OFFSET 64
/* Return a non-zero value iff PC is in a signal trampoline. On
AIX, we determine this by seeing if the pc is in a special
execute only page called the ``gate page''. The addresses in
question are determined by letting the AIX native portion of
the code determine these addresses via its own nefarious
means. */
int
ia64_aix_in_sigtramp (CORE_ADDR pc, char *func_name)
{
CORE_ADDR gate_area_start, gate_area_end;
if (aix5_find_gate_addresses_hook == 0)
return 0;
(*aix5_find_gate_addresses_hook) (&gate_area_start, &gate_area_end);
return (pc >= gate_area_start && pc < gate_area_end);
}
/* IA-64 AIX specific function which, given a frame address and
a register number, returns the address at which that register may be
found. 0 is returned for registers which aren't stored in the
sigcontext structure. */
CORE_ADDR
ia64_aix_sigcontext_register_address (CORE_ADDR sp, int regno)
{
/* The hardcoded offsets that follow are actually offsets to the
corresponding members in struct __context in
/usr/include/sys/context.h (on an IA-64 AIX5 box). */
if (IA64_GR0_REGNUM <= regno && regno <= IA64_GR31_REGNUM)
return sp + IA64_AIX_SIGCONTEXT_OFFSET + 152 + 8 * (regno - IA64_GR0_REGNUM);
else if (IA64_BR0_REGNUM <= regno && regno <= IA64_BR7_REGNUM)
return sp + IA64_AIX_SIGCONTEXT_OFFSET + 408 + 8 * (regno - IA64_BR0_REGNUM);
else if (IA64_FR0_REGNUM <= regno && regno <= IA64_FR127_REGNUM)
return sp + IA64_AIX_SIGCONTEXT_OFFSET + 480 + 16 * (regno - IA64_FR0_REGNUM);
else
switch (regno)
{
case IA64_PSR_REGNUM :
return sp + IA64_AIX_SIGCONTEXT_OFFSET + 0;
case IA64_IP_REGNUM :
return sp + IA64_AIX_SIGCONTEXT_OFFSET + 8;
/* iipa is at 16.
isr is at 24.
ifa is at 32.
iim is at 40. */
case IA64_CFM_REGNUM :
return sp + IA64_AIX_SIGCONTEXT_OFFSET + 48; /* ifs, actually */
case IA64_RSC_REGNUM :
return sp + IA64_AIX_SIGCONTEXT_OFFSET + 56;
case IA64_BSP_REGNUM :
return sp + IA64_AIX_SIGCONTEXT_OFFSET + 64;
case IA64_BSPSTORE_REGNUM :
return sp + IA64_AIX_SIGCONTEXT_OFFSET + 72;
case IA64_RNAT_REGNUM :
return sp + IA64_AIX_SIGCONTEXT_OFFSET + 80;
case IA64_PFS_REGNUM :
return sp + IA64_AIX_SIGCONTEXT_OFFSET + 88;
case IA64_UNAT_REGNUM :
return sp + IA64_AIX_SIGCONTEXT_OFFSET + 96;
case IA64_PR_REGNUM :
return sp + IA64_AIX_SIGCONTEXT_OFFSET + 104;
case IA64_CCV_REGNUM :
return sp + IA64_AIX_SIGCONTEXT_OFFSET + 112;
case IA64_LC_REGNUM :
return sp + IA64_AIX_SIGCONTEXT_OFFSET + 120;
case IA64_EC_REGNUM :
return sp + IA64_AIX_SIGCONTEXT_OFFSET + 128;
/* nats is at 136; this is an address independent NaT bitmask */
case IA64_FPSR_REGNUM :
return sp + IA64_AIX_SIGCONTEXT_OFFSET + 144;
default :
return 0;
}
}
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