| 1 | /* Target-dependent code for the IA-64 for GDB, the GNU debugger. |
| 2 | Copyright 2000, 2001 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | |
| 24 | /* External hook for finding gate addresses on AIX. */ |
| 25 | void (*aix5_find_gate_addresses_hook) (CORE_ADDR *, CORE_ADDR *) = 0; |
| 26 | |
| 27 | /* Offset to sc_context member of sigcontext structure from frame of handler */ |
| 28 | #define IA64_AIX_SIGCONTEXT_OFFSET 64 |
| 29 | |
| 30 | /* Return a non-zero value iff PC is in a signal trampoline. On |
| 31 | AIX, we determine this by seeing if the pc is in a special |
| 32 | execute only page called the ``gate page''. The addresses in |
| 33 | question are determined by letting the AIX native portion of |
| 34 | the code determine these addresses via its own nefarious |
| 35 | means. */ |
| 36 | |
| 37 | int |
| 38 | ia64_aix_in_sigtramp (CORE_ADDR pc, char *func_name) |
| 39 | { |
| 40 | CORE_ADDR gate_area_start, gate_area_end; |
| 41 | |
| 42 | if (aix5_find_gate_addresses_hook == 0) |
| 43 | return 0; |
| 44 | |
| 45 | (*aix5_find_gate_addresses_hook) (&gate_area_start, &gate_area_end); |
| 46 | |
| 47 | return (pc >= gate_area_start && pc < gate_area_end); |
| 48 | } |
| 49 | |
| 50 | |
| 51 | /* IA-64 AIX specific function which, given a frame address and |
| 52 | a register number, returns the address at which that register may be |
| 53 | found. 0 is returned for registers which aren't stored in the |
| 54 | sigcontext structure. */ |
| 55 | |
| 56 | CORE_ADDR |
| 57 | ia64_aix_sigcontext_register_address (CORE_ADDR sp, int regno) |
| 58 | { |
| 59 | /* The hardcoded offsets that follow are actually offsets to the |
| 60 | corresponding members in struct __context in |
| 61 | /usr/include/sys/context.h (on an IA-64 AIX5 box). */ |
| 62 | if (IA64_GR0_REGNUM <= regno && regno <= IA64_GR31_REGNUM) |
| 63 | return sp + IA64_AIX_SIGCONTEXT_OFFSET + 152 + 8 * (regno - IA64_GR0_REGNUM); |
| 64 | else if (IA64_BR0_REGNUM <= regno && regno <= IA64_BR7_REGNUM) |
| 65 | return sp + IA64_AIX_SIGCONTEXT_OFFSET + 408 + 8 * (regno - IA64_BR0_REGNUM); |
| 66 | else if (IA64_FR0_REGNUM <= regno && regno <= IA64_FR127_REGNUM) |
| 67 | return sp + IA64_AIX_SIGCONTEXT_OFFSET + 480 + 16 * (regno - IA64_FR0_REGNUM); |
| 68 | else |
| 69 | switch (regno) |
| 70 | { |
| 71 | case IA64_PSR_REGNUM : |
| 72 | return sp + IA64_AIX_SIGCONTEXT_OFFSET + 0; |
| 73 | case IA64_IP_REGNUM : |
| 74 | return sp + IA64_AIX_SIGCONTEXT_OFFSET + 8; |
| 75 | /* iipa is at 16. |
| 76 | isr is at 24. |
| 77 | ifa is at 32. |
| 78 | iim is at 40. */ |
| 79 | case IA64_CFM_REGNUM : |
| 80 | return sp + IA64_AIX_SIGCONTEXT_OFFSET + 48; /* ifs, actually */ |
| 81 | case IA64_RSC_REGNUM : |
| 82 | return sp + IA64_AIX_SIGCONTEXT_OFFSET + 56; |
| 83 | case IA64_BSP_REGNUM : |
| 84 | return sp + IA64_AIX_SIGCONTEXT_OFFSET + 64; |
| 85 | case IA64_BSPSTORE_REGNUM : |
| 86 | return sp + IA64_AIX_SIGCONTEXT_OFFSET + 72; |
| 87 | case IA64_RNAT_REGNUM : |
| 88 | return sp + IA64_AIX_SIGCONTEXT_OFFSET + 80; |
| 89 | case IA64_PFS_REGNUM : |
| 90 | return sp + IA64_AIX_SIGCONTEXT_OFFSET + 88; |
| 91 | case IA64_UNAT_REGNUM : |
| 92 | return sp + IA64_AIX_SIGCONTEXT_OFFSET + 96; |
| 93 | case IA64_PR_REGNUM : |
| 94 | return sp + IA64_AIX_SIGCONTEXT_OFFSET + 104; |
| 95 | case IA64_CCV_REGNUM : |
| 96 | return sp + IA64_AIX_SIGCONTEXT_OFFSET + 112; |
| 97 | case IA64_LC_REGNUM : |
| 98 | return sp + IA64_AIX_SIGCONTEXT_OFFSET + 120; |
| 99 | case IA64_EC_REGNUM : |
| 100 | return sp + IA64_AIX_SIGCONTEXT_OFFSET + 128; |
| 101 | /* nats is at 136; this is an address independent NaT bitmask */ |
| 102 | case IA64_FPSR_REGNUM : |
| 103 | return sp + IA64_AIX_SIGCONTEXT_OFFSET + 144; |
| 104 | default : |
| 105 | return 0; |
| 106 | } |
| 107 | } |