1/* Native-dependent code for modern VAX BSD's. 2 3 Copyright 2004 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 "inferior.h" 24#include "regcache.h" 25#include "target.h" 26 27#include <sys/types.h> 28#include <sys/ptrace.h> 29#include <machine/reg.h> 30 31#include "vax-tdep.h" 32#include "inf-ptrace.h" 33 34/* Supply the general-purpose registers stored in GREGS to REGCACHE. */ 35 36static void 37vaxbsd_supply_gregset (struct regcache *regcache, const void *gregs) 38{ 39 const char *regs = gregs; 40 int regnum; 41 42 for (regnum = 0; regnum < VAX_NUM_REGS; regnum++) 43 regcache_raw_supply (regcache, regnum, regs + regnum * 4); 44} 45 46/* Collect the general-purpose registers from REGCACHE and store them 47 in GREGS. */ 48 49static void 50vaxbsd_collect_gregset (const struct regcache *regcache, 51 void *gregs, int regnum) 52{ 53 char *regs = gregs; 54 int i; 55 56 for (i = 0; i <= VAX_NUM_REGS; i++) 57 { 58 if (regnum == -1 || regnum == i) 59 regcache_raw_collect (regcache, i, regs + i * 4); 60 } 61} 62 63 64/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this 65 for all registers. */ 66 67static void 68vaxbsd_fetch_inferior_registers (int regnum) 69{ 70 struct reg regs; 71 72 if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), 73 (PTRACE_TYPE_ARG3) ®s, 0) == -1) 74 perror_with_name ("Couldn't get registers"); 75 76 vaxbsd_supply_gregset (current_regcache, ®s); 77} 78 79/* Store register REGNUM back into the inferior. If REGNUM is -1, do 80 this for all registers. */ 81 82static void 83vaxbsd_store_inferior_registers (int regnum) 84{ 85 struct reg regs; 86 87 if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), 88 (PTRACE_TYPE_ARG3) ®s, 0) == -1) 89 perror_with_name ("Couldn't get registers"); 90 91 vaxbsd_collect_gregset (current_regcache, ®s, regnum); 92 93 if (ptrace (PT_SETREGS, PIDGET (inferior_ptid), 94 (PTRACE_TYPE_ARG3) ®s, 0) == -1) 95 perror_with_name ("Couldn't write registers"); 96} 97 98 99/* Support for debugging kernel virtual memory images. */ 100 101#include <sys/types.h> 102#include <machine/pcb.h> 103 104#include "bsd-kvm.h" 105 106static int 107vaxbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) 108{ 109 int regnum; 110 111 /* The following is true for OpenBSD 3.5: 112 113 The pcb contains the register state at the context switch inside 114 cpu_switch(). */ 115 116 /* The stack pointer shouldn't be zero. */ 117 if (pcb->KSP == 0) 118 return 0; 119 120 for (regnum = VAX_R0_REGNUM; regnum < VAX_AP_REGNUM; regnum++) 121 regcache_raw_supply (regcache, regnum, &pcb->R[regnum - VAX_R0_REGNUM]); 122 regcache_raw_supply (regcache, VAX_AP_REGNUM, &pcb->AP); 123 regcache_raw_supply (regcache, VAX_FP_REGNUM, &pcb->FP); 124 regcache_raw_supply (regcache, VAX_SP_REGNUM, &pcb->KSP); 125 regcache_raw_supply (regcache, VAX_PC_REGNUM, &pcb->PC); 126 regcache_raw_supply (regcache, VAX_PS_REGNUM, &pcb->PSL); 127 128 return 1; 129} 130 131 132/* Provide a prototype to silence -Wmissing-prototypes. */ 133void _initialize_vaxbsd_nat (void); 134 135void 136_initialize_vaxbsd_nat (void) 137{ 138 struct target_ops *t; 139 140 t = inf_ptrace_target (); 141 t->to_fetch_registers = vaxbsd_fetch_inferior_registers; 142 t->to_store_registers = vaxbsd_store_inferior_registers; 143 add_target (t); 144 145 /* Support debugging kernel virtual memory images. */ 146 bsd_kvm_add_target (vaxbsd_supply_pcb); 147} 148