1 /* Native-dependent code for OpenBSD/sparc64. 2 3 Copyright (C) 2003-2020 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 "gdbcore.h" 22 #include "regcache.h" 23 #include "target.h" 24 25 #include "sparc64-tdep.h" 26 #include "sparc-nat.h" 27 #include "obsd-nat.h" 28 29 /* Determine whether `gregset_t' contains register REGNUM. */ 30 31 static int 32 sparc64obsd_gregset_supplies_p (struct gdbarch *gdbarch, int regnum) 33 { 34 /* Integer registers. */ 35 if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM) 36 || (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM) 37 || (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM) 38 || (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM)) 39 return 1; 40 41 /* Control registers. */ 42 if (regnum == SPARC64_PC_REGNUM 43 || regnum == SPARC64_NPC_REGNUM 44 || regnum == SPARC64_STATE_REGNUM 45 || regnum == SPARC64_Y_REGNUM) 46 return 1; 47 48 return 0; 49 } 50 51 /* Determine whether `fpregset_t' contains register REGNUM. */ 52 53 static int 54 sparc64obsd_fpregset_supplies_p (struct gdbarch *gdbarch, int regnum) 55 { 56 /* Floating-point registers. */ 57 if ((regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM) 58 || (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM)) 59 return 1; 60 61 /* Control registers. */ 62 if (regnum == SPARC64_FSR_REGNUM) 63 return 1; 64 65 return 0; 66 } 67 68 69 /* Support for debugging kernel virtual memory images. */ 70 71 #include <sys/types.h> 72 #include <machine/pcb.h> 73 74 #include "bsd-kvm.h" 75 76 static int 77 sparc64obsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) 78 { 79 u_int64_t state; 80 int regnum; 81 82 /* The following is true for OpenBSD 3.0: 83 84 The pcb contains %sp and %pc, %pstate and %cwp. From this 85 information we reconstruct the register state as it would look 86 when we just returned from cpu_switch(). */ 87 88 /* The stack pointer shouldn't be zero. */ 89 if (pcb->pcb_sp == 0) 90 return 0; 91 92 /* If the program counter is zero, this is probably a core dump, and 93 we can get %pc from the stack. */ 94 if (pcb->pcb_pc == 0) 95 read_memory(pcb->pcb_sp + BIAS - 176 + (11 * 8), 96 (gdb_byte *)&pcb->pcb_pc, sizeof pcb->pcb_pc); 97 98 regcache->raw_supply (SPARC_SP_REGNUM, &pcb->pcb_sp); 99 regcache->raw_supply (SPARC64_PC_REGNUM, &pcb->pcb_pc); 100 101 state = pcb->pcb_pstate << 8 | pcb->pcb_cwp; 102 regcache->raw_supply (SPARC64_STATE_REGNUM, &state); 103 104 sparc_supply_rwindow (regcache, pcb->pcb_sp, -1); 105 106 return 1; 107 } 108 109 /* Add some extra features to the generic SPARC target. */ 110 static sparc_target<obsd_nat_target> the_sparc64_obsd_nat_target; 111 112 void _initialize_sparc64obsd_nat (); 113 void 114 _initialize_sparc64obsd_nat () 115 { 116 sparc_supply_gregset = sparc64_supply_gregset; 117 sparc_collect_gregset = sparc64_collect_gregset; 118 sparc_supply_fpregset = sparc64_supply_fpregset; 119 sparc_collect_fpregset = sparc64_collect_fpregset; 120 sparc_gregset_supplies_p = sparc64obsd_gregset_supplies_p; 121 sparc_fpregset_supplies_p = sparc64obsd_fpregset_supplies_p; 122 123 sparc_gregmap = &sparc64nbsd_gregmap; 124 sparc_fpregmap = &sparc64_bsd_fpregmap; 125 126 /* Add some extra features to the generic SPARC target. */ 127 add_inf_child_target (&the_sparc64_obsd_nat_target); 128 129 /* Support debugging kernel virtual memory images. */ 130 bsd_kvm_add_target (sparc64obsd_supply_pcb); 131 } 132