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[/] [or1k/] [tags/] [start/] [insight/] [gdb/] [ia64-aix-tdep.c] - Rev 578
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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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