1 /* Native-dependent code for OpenBSD/sparc64. 2 3 Copyright 2003, 2004, 2006 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 "gdbcore.h" 24 #include "regcache.h" 25 #include "target.h" 26 27 #include "obsd-nat.h" 28 #include "sparc64-tdep.h" 29 #include "sparc-nat.h" 30 31 static void 32 sparc64obsd_supply_gregset (const struct sparc_gregset *gregset, 33 struct regcache *regcache, 34 int regnum, const void *gregs) 35 { 36 sparc64_supply_gregset (&sparc64nbsd_gregset, regcache, regnum, gregs); 37 } 38 39 static void 40 sparc64obsd_collect_gregset (const struct sparc_gregset *gregset, 41 const struct regcache *regcache, 42 int regnum, void *gregs) 43 { 44 sparc64_collect_gregset (&sparc64nbsd_gregset, regcache, regnum, gregs); 45 } 46 47 static void 48 sparc64obsd_supply_fpregset (struct regcache *regcache, 49 int regnum, const void *fpregs) 50 { 51 sparc64_supply_fpregset (regcache, regnum, fpregs); 52 } 53 54 static void 55 sparc64obsd_collect_fpregset (const struct regcache *regcache, 56 int regnum, void *fpregs) 57 { 58 sparc64_collect_fpregset (regcache, regnum, fpregs); 59 } 60 61 /* Determine whether `gregset_t' contains register REGNUM. */ 62 63 static int 64 sparc64obsd_gregset_supplies_p (int regnum) 65 { 66 /* Integer registers. */ 67 if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM) 68 || (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM) 69 || (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM) 70 || (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM)) 71 return 1; 72 73 /* Control registers. */ 74 if (regnum == SPARC64_PC_REGNUM 75 || regnum == SPARC64_NPC_REGNUM 76 || regnum == SPARC64_STATE_REGNUM 77 || regnum == SPARC64_Y_REGNUM) 78 return 1; 79 80 return 0; 81 } 82 83 /* Determine whether `fpregset_t' contains register REGNUM. */ 84 85 static int 86 sparc64obsd_fpregset_supplies_p (int regnum) 87 { 88 /* Floating-point registers. */ 89 if ((regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM) 90 || (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM)) 91 return 1; 92 93 /* Control registers. */ 94 if (regnum == SPARC64_FSR_REGNUM) 95 return 1; 96 97 return 0; 98 } 99 100 101 /* Support for debugging kernel virtual memory images. */ 102 103 #include <sys/types.h> 104 #include <machine/pcb.h> 105 106 #include "bsd-kvm.h" 107 108 static int 109 sparc64obsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) 110 { 111 u_int64_t state; 112 int regnum; 113 114 /* The following is true for OpenBSD 3.0: 115 116 The pcb contains %sp and %pc, %pstate and %cwp. From this 117 information we reconstruct the register state as it would look 118 when we just returned from cpu_switch(). */ 119 120 /* The stack pointer shouldn't be zero. */ 121 if (pcb->pcb_sp == 0) 122 return 0; 123 124 /* If the program counter is zero, this is probably a core dump, and 125 we can get %pc from the stack. */ 126 if (pcb->pcb_pc == 0) 127 read_memory(pcb->pcb_sp + BIAS - 176 + (11 * 8), 128 (char *)&pcb->pcb_pc, sizeof pcb->pcb_pc); 129 130 regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp); 131 regcache_raw_supply (regcache, SPARC64_PC_REGNUM, &pcb->pcb_pc); 132 133 state = pcb->pcb_pstate << 8 | pcb->pcb_cwp; 134 regcache_raw_supply (regcache, SPARC64_STATE_REGNUM, &state); 135 136 sparc_supply_rwindow (regcache, pcb->pcb_sp, -1); 137 138 return 1; 139 } 140 141 142 /* Provide a prototype to silence -Wmissing-prototypes. */ 143 void _initialize_sparc64obsd_nat (void); 144 145 void 146 _initialize_sparc64obsd_nat (void) 147 { 148 struct target_ops *t; 149 150 sparc_supply_gregset = sparc64obsd_supply_gregset; 151 sparc_collect_gregset = sparc64obsd_collect_gregset; 152 sparc_supply_fpregset = sparc64obsd_supply_fpregset; 153 sparc_collect_fpregset = sparc64obsd_collect_fpregset; 154 sparc_gregset_supplies_p = sparc64obsd_gregset_supplies_p; 155 sparc_fpregset_supplies_p = sparc64obsd_fpregset_supplies_p; 156 157 /* Add some extra features to the generic SPARC target. */ 158 t = sparc_target (); 159 t->to_pid_to_str = obsd_pid_to_str; 160 t->to_find_new_threads = obsd_find_new_threads; 161 t->to_wait = obsd_wait; 162 add_target (t); 163 164 /* Support debugging kernel virtual memory images. */ 165 bsd_kvm_add_target (sparc64obsd_supply_pcb); 166 } 167