| /* Target-dependent code for the IA-64 for GDB, the GNU debugger. |
| Copyright 2000, 2004 |
| 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" |
| #include "arch-utils.h" |
| #include "gdbcore.h" |
| |
| /* The sigtramp code is in a non-readable (executable-only) region |
| of memory called the ``gate page''. The addresses in question |
| were determined by examining the system headers. They are |
| overly generous to allow for different pages sizes. */ |
| |
| #define GATE_AREA_START 0xa000000000000100LL |
| #define GATE_AREA_END 0xa000000000020000LL |
| |
| /* Offset to sigcontext structure from frame of handler */ |
| #define IA64_LINUX_SIGCONTEXT_OFFSET 192 |
| |
| int |
| ia64_linux_in_sigtramp (CORE_ADDR pc, char *func_name) |
| { |
| return (pc >= (CORE_ADDR) GATE_AREA_START && pc < (CORE_ADDR) GATE_AREA_END); |
| } |
| |
| /* IA-64 GNU/Linux 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 the |
| sigcontext structure. */ |
| |
| CORE_ADDR |
| ia64_linux_sigcontext_register_address (CORE_ADDR sp, int regno) |
| { |
| char buf[8]; |
| CORE_ADDR sigcontext_addr = 0; |
| |
| /* The address of the sigcontext area is found at offset 16 in the sigframe. */ |
| read_memory (sp + 16, buf, 8); |
| sigcontext_addr = extract_unsigned_integer (buf, 8); |
| |
| if (IA64_GR0_REGNUM <= regno && regno <= IA64_GR31_REGNUM) |
| return sigcontext_addr + 200 + 8 * (regno - IA64_GR0_REGNUM); |
| else if (IA64_BR0_REGNUM <= regno && regno <= IA64_BR7_REGNUM) |
| return sigcontext_addr + 136 + 8 * (regno - IA64_BR0_REGNUM); |
| else if (IA64_FR0_REGNUM <= regno && regno <= IA64_FR127_REGNUM) |
| return sigcontext_addr + 464 + 16 * (regno - IA64_FR0_REGNUM); |
| else |
| switch (regno) |
| { |
| case IA64_IP_REGNUM : |
| return sigcontext_addr + 40; |
| case IA64_CFM_REGNUM : |
| return sigcontext_addr + 48; |
| case IA64_PSR_REGNUM : |
| return sigcontext_addr + 56; /* user mask only */ |
| /* sc_ar_rsc is provided, from which we could compute bspstore, but |
| I don't think it's worth it. Anyway, if we want it, it's at offset |
| 64 */ |
| case IA64_BSP_REGNUM : |
| return sigcontext_addr + 72; |
| case IA64_RNAT_REGNUM : |
| return sigcontext_addr + 80; |
| case IA64_CCV_REGNUM : |
| return sigcontext_addr + 88; |
| case IA64_UNAT_REGNUM : |
| return sigcontext_addr + 96; |
| case IA64_FPSR_REGNUM : |
| return sigcontext_addr + 104; |
| case IA64_PFS_REGNUM : |
| return sigcontext_addr + 112; |
| case IA64_LC_REGNUM : |
| return sigcontext_addr + 120; |
| case IA64_PR_REGNUM : |
| return sigcontext_addr + 128; |
| default : |
| return 0; |
| } |
| } |