51931cbbf6
* ia64-linux-tdep.c: Include gdbcore.h.
(IA64_LINUX_SIGCONTEXT_OFFSET): Magic constant removed.
(ia64_linux_sigcontext_register_addr): Find the address of the
sigcontext area stored in the sigframe instead of using
a magic offset constant.
96 lines
3.3 KiB
C
96 lines
3.3 KiB
C
/* 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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#include "gdbcore.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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char buf[8];
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CORE_ADDR sigcontext_addr = 0;
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/* The address of the sigcontext area is found at offset 16 in the sigframe. */
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read_memory (sp + 16, buf, 8);
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sigcontext_addr = extract_unsigned_integer (buf, 8);
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if (IA64_GR0_REGNUM <= regno && regno <= IA64_GR31_REGNUM)
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return sigcontext_addr + 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 sigcontext_addr + 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 sigcontext_addr + 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 sigcontext_addr + 40;
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case IA64_CFM_REGNUM :
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return sigcontext_addr + 48;
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case IA64_PSR_REGNUM :
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return sigcontext_addr + 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 sigcontext_addr + 72;
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case IA64_RNAT_REGNUM :
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return sigcontext_addr + 80;
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case IA64_CCV_REGNUM :
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return sigcontext_addr + 88;
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case IA64_UNAT_REGNUM :
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return sigcontext_addr + 96;
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case IA64_FPSR_REGNUM :
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return sigcontext_addr + 104;
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case IA64_PFS_REGNUM :
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return sigcontext_addr + 112;
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case IA64_LC_REGNUM :
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return sigcontext_addr + 120;
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case IA64_PR_REGNUM :
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return sigcontext_addr + 128;
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default :
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return 0;
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}
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}
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