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/* Target-dependent code for the IA-64 for GDB, the GNU debugger.
Copyright 2000
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"
#include "arch-utils.h"
#include "gdbcore.h"
/* The sigtramp code is in a non-readable (executable-only) region
of memory called the ``gate page''. The addresses in question
were determined by examining the system headers. They are
overly generous to allow for different pages sizes. */
#define GATE_AREA_START 0xa000000000000100LL
#define GATE_AREA_END 0xa000000000010000LL
/* Offset to sigcontext structure from frame of handler */
#define IA64_LINUX_SIGCONTEXT_OFFSET 192
int
ia64_linux_in_sigtramp (CORE_ADDR pc, char *func_name)
{
return (pc >= (CORE_ADDR) GATE_AREA_START && pc < (CORE_ADDR) GATE_AREA_END);
}
/* IA-64 GNU/Linux 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 the
sigcontext structure. */
CORE_ADDR
ia64_linux_sigcontext_register_address (CORE_ADDR sp, int regno)
{
char buf[8];
CORE_ADDR sigcontext_addr = 0;
/* The address of the sigcontext area is found at offset 16 in the sigframe. */
read_memory (sp + 16, buf, 8);
sigcontext_addr = extract_unsigned_integer (buf, 8);
if (IA64_GR0_REGNUM <= regno && regno <= IA64_GR31_REGNUM)
return sigcontext_addr + 200 + 8 * (regno - IA64_GR0_REGNUM);
else if (IA64_BR0_REGNUM <= regno && regno <= IA64_BR7_REGNUM)
return sigcontext_addr + 136 + 8 * (regno - IA64_BR0_REGNUM);
else if (IA64_FR0_REGNUM <= regno && regno <= IA64_FR127_REGNUM)
return sigcontext_addr + 464 + 16 * (regno - IA64_FR0_REGNUM);
else
switch (regno)
{
case IA64_IP_REGNUM :
return sigcontext_addr + 40;
case IA64_CFM_REGNUM :
return sigcontext_addr + 48;
case IA64_PSR_REGNUM :
return sigcontext_addr + 56; /* user mask only */
/* sc_ar_rsc is provided, from which we could compute bspstore, but
I don't think it's worth it. Anyway, if we want it, it's at offset
64 */
case IA64_BSP_REGNUM :
return sigcontext_addr + 72;
case IA64_RNAT_REGNUM :
return sigcontext_addr + 80;
case IA64_CCV_REGNUM :
return sigcontext_addr + 88;
case IA64_UNAT_REGNUM :
return sigcontext_addr + 96;
case IA64_FPSR_REGNUM :
return sigcontext_addr + 104;
case IA64_PFS_REGNUM :
return sigcontext_addr + 112;
case IA64_LC_REGNUM :
return sigcontext_addr + 120;
case IA64_PR_REGNUM :
return sigcontext_addr + 128;
default :
return 0;
}
}
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