| /* 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; |
| } |
| } |