| 1 | /* Target-dependent code for the IA-64 for GDB, the GNU debugger. |
| 2 | Copyright 2000 |
| 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 | #include "arch-utils.h" |
| 24 | |
| 25 | /* The sigtramp code is in a non-readable (executable-only) region |
| 26 | of memory called the ``gate page''. The addresses in question |
| 27 | were determined by examining the system headers. They are |
| 28 | overly generous to allow for different pages sizes. */ |
| 29 | |
| 30 | #define GATE_AREA_START 0xa000000000000100LL |
| 31 | #define GATE_AREA_END 0xa000000000010000LL |
| 32 | |
| 33 | /* Offset to sigcontext structure from frame of handler */ |
| 34 | #define IA64_LINUX_SIGCONTEXT_OFFSET 160 |
| 35 | |
| 36 | int |
| 37 | ia64_linux_in_sigtramp (CORE_ADDR pc, char *func_name) |
| 38 | { |
| 39 | return (pc >= (CORE_ADDR) GATE_AREA_START && pc < (CORE_ADDR) GATE_AREA_END); |
| 40 | } |
| 41 | |
| 42 | /* IA-64 GNU/Linux specific function which, given a frame address and |
| 43 | a register number, returns the address at which that register may be |
| 44 | found. 0 is returned for registers which aren't stored in the the |
| 45 | sigcontext structure. */ |
| 46 | |
| 47 | CORE_ADDR |
| 48 | ia64_linux_sigcontext_register_address (CORE_ADDR sp, int regno) |
| 49 | { |
| 50 | if (IA64_GR0_REGNUM <= regno && regno <= IA64_GR31_REGNUM) |
| 51 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 200 + 8 * (regno - IA64_GR0_REGNUM); |
| 52 | else if (IA64_BR0_REGNUM <= regno && regno <= IA64_BR7_REGNUM) |
| 53 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 136 + 8 * (regno - IA64_BR0_REGNUM); |
| 54 | else if (IA64_FR0_REGNUM <= regno && regno <= IA64_FR127_REGNUM) |
| 55 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 464 + 16 * (regno - IA64_FR0_REGNUM); |
| 56 | else |
| 57 | switch (regno) |
| 58 | { |
| 59 | case IA64_IP_REGNUM : |
| 60 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 40; |
| 61 | case IA64_CFM_REGNUM : |
| 62 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 48; |
| 63 | case IA64_PSR_REGNUM : |
| 64 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 56; /* user mask only */ |
| 65 | /* sc_ar_rsc is provided, from which we could compute bspstore, but |
| 66 | I don't think it's worth it. Anyway, if we want it, it's at offset |
| 67 | 64 */ |
| 68 | case IA64_BSP_REGNUM : |
| 69 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 72; |
| 70 | case IA64_RNAT_REGNUM : |
| 71 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 80; |
| 72 | case IA64_CCV_REGNUM : |
| 73 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 88; |
| 74 | case IA64_UNAT_REGNUM : |
| 75 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 96; |
| 76 | case IA64_FPSR_REGNUM : |
| 77 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 104; |
| 78 | case IA64_PFS_REGNUM : |
| 79 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 112; |
| 80 | case IA64_LC_REGNUM : |
| 81 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 120; |
| 82 | case IA64_PR_REGNUM : |
| 83 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 128; |
| 84 | default : |
| 85 | return 0; |
| 86 | } |
| 87 | } |