| 1 | /* Native-dependent code for FreeBSD/sparc64. |
| 2 | |
| 3 | Copyright (C) 2003, 2004, 2005, 2007, 2008 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "regcache.h" |
| 22 | #include "target.h" |
| 23 | |
| 24 | #include "fbsd-nat.h" |
| 25 | #include "sparc64-tdep.h" |
| 26 | #include "sparc-nat.h" |
| 27 | \f |
| 28 | |
| 29 | /* Support for debugging kernel virtual memory images. */ |
| 30 | |
| 31 | #include <sys/types.h> |
| 32 | #include <machine/pcb.h> |
| 33 | |
| 34 | #include "bsd-kvm.h" |
| 35 | |
| 36 | static int |
| 37 | sparc64fbsd_kvm_supply_pcb (struct regcache *regcache, struct pcb *pcb) |
| 38 | { |
| 39 | /* The following is true for FreeBSD 5.4: |
| 40 | |
| 41 | The pcb contains %sp and %pc. Since the register windows are |
| 42 | explicitly flushed, we can find the `local' and `in' registers on |
| 43 | the stack. */ |
| 44 | |
| 45 | /* The stack pointer shouldn't be zero. */ |
| 46 | if (pcb->pcb_sp == 0) |
| 47 | return 0; |
| 48 | |
| 49 | regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp); |
| 50 | regcache_raw_supply (regcache, SPARC64_PC_REGNUM, &pcb->pcb_pc); |
| 51 | |
| 52 | /* Synthesize %npc. */ |
| 53 | pcb->pcb_pc += 4; |
| 54 | regcache_raw_supply (regcache, SPARC64_NPC_REGNUM, &pcb->pcb_pc); |
| 55 | |
| 56 | /* Read `local' and `in' registers from the stack. */ |
| 57 | sparc_supply_rwindow (regcache, pcb->pcb_sp, -1); |
| 58 | |
| 59 | return 1; |
| 60 | } |
| 61 | \f |
| 62 | |
| 63 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 64 | void _initialize_sparc64fbsd_nat (void); |
| 65 | |
| 66 | void |
| 67 | _initialize_sparc64fbsd_nat (void) |
| 68 | { |
| 69 | struct target_ops *t; |
| 70 | |
| 71 | /* Add some extra features to the generic SPARC target. */ |
| 72 | t = sparc_target (); |
| 73 | t->to_pid_to_exec_file = fbsd_pid_to_exec_file; |
| 74 | t->to_find_memory_regions = fbsd_find_memory_regions; |
| 75 | t->to_make_corefile_notes = fbsd_make_corefile_notes; |
| 76 | add_target (t); |
| 77 | |
| 78 | sparc_gregset = &sparc64fbsd_gregset; |
| 79 | |
| 80 | /* Support debugging kernel virtual memory images. */ |
| 81 | bsd_kvm_add_target (sparc64fbsd_kvm_supply_pcb); |
| 82 | } |