1 /* Native-dependent code for Alpha BSD's.
3 Copyright (C) 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
4 2011 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "alpha-tdep.h"
26 #include "alphabsd-tdep.h"
27 #include "inf-ptrace.h"
29 #include <sys/types.h>
30 #include <sys/ptrace.h>
31 #include <machine/reg.h>
33 #ifdef HAVE_SYS_PROCFS_H
34 #include <sys/procfs.h>
37 #ifndef HAVE_GREGSET_T
38 typedef struct reg gregset_t;
41 #ifndef HAVE_FPREGSET_T
42 typedef struct fpreg fpregset_t;
47 /* Provide *regset() wrappers around the generic Alpha BSD register
48 supply/fill routines. */
51 supply_gregset (struct regcache *regcache, const gregset_t *gregsetp)
53 alphabsd_supply_reg (regcache, (const char *) gregsetp, -1);
57 fill_gregset (const struct regcache *regcache, gregset_t *gregsetp, int regno)
59 alphabsd_fill_reg (regcache, (char *) gregsetp, regno);
63 supply_fpregset (struct regcache *regcache, const fpregset_t *fpregsetp)
65 alphabsd_supply_fpreg (regcache, (const char *) fpregsetp, -1);
69 fill_fpregset (const struct regcache *regcache,
70 fpregset_t *fpregsetp, int regno)
72 alphabsd_fill_fpreg (regcache, (char *) fpregsetp, regno);
75 /* Determine if PT_GETREGS fetches this register. */
78 getregs_supplies (int regno)
80 return ((regno >= ALPHA_V0_REGNUM && regno <= ALPHA_ZERO_REGNUM)
81 || regno >= ALPHA_PC_REGNUM);
84 /* Fetch register REGNO from the inferior. If REGNO is -1, do this
85 for all registers (including the floating point registers). */
88 alphabsd_fetch_inferior_registers (struct target_ops *ops,
89 struct regcache *regcache, int regno)
91 if (regno == -1 || getregs_supplies (regno))
95 if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
96 (PTRACE_TYPE_ARG3) &gregs, 0) == -1)
97 perror_with_name (_("Couldn't get registers"));
99 alphabsd_supply_reg (regcache, (char *) &gregs, regno);
105 || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))
109 if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
110 (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
111 perror_with_name (_("Couldn't get floating point status"));
113 alphabsd_supply_fpreg (regcache, (char *) &fpregs, regno);
117 /* Store register REGNO back into the inferior. If REGNO is -1, do
118 this for all registers (including the floating point registers). */
121 alphabsd_store_inferior_registers (struct target_ops *ops,
122 struct regcache *regcache, int regno)
124 if (regno == -1 || getregs_supplies (regno))
127 if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
128 (PTRACE_TYPE_ARG3) &gregs, 0) == -1)
129 perror_with_name (_("Couldn't get registers"));
131 alphabsd_fill_reg (regcache, (char *) &gregs, regno);
133 if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
134 (PTRACE_TYPE_ARG3) &gregs, 0) == -1)
135 perror_with_name (_("Couldn't write registers"));
142 || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))
146 if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
147 (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
148 perror_with_name (_("Couldn't get floating point status"));
150 alphabsd_fill_fpreg (regcache, (char *) &fpregs, regno);
152 if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
153 (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
154 perror_with_name (_("Couldn't write floating point status"));
159 /* Support for debugging kernel virtual memory images. */
161 #include <sys/types.h>
162 #include <sys/signal.h>
163 #include <machine/pcb.h>
168 alphabsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
172 /* The following is true for OpenBSD 3.9:
174 The pcb contains the register state at the context switch inside
177 /* The stack pointer shouldn't be zero. */
178 if (pcb->pcb_hw.apcb_ksp == 0)
181 regcache_raw_supply (regcache, ALPHA_SP_REGNUM, &pcb->pcb_hw.apcb_ksp);
183 for (regnum = ALPHA_S0_REGNUM; regnum < ALPHA_A0_REGNUM; regnum++)
184 regcache_raw_supply (regcache, regnum,
185 &pcb->pcb_context[regnum - ALPHA_S0_REGNUM]);
186 regcache_raw_supply (regcache, ALPHA_RA_REGNUM, &pcb->pcb_context[7]);
192 /* Provide a prototype to silence -Wmissing-prototypes. */
193 void _initialize_alphabsd_nat (void);
196 _initialize_alphabsd_nat (void)
198 struct target_ops *t;
200 t = inf_ptrace_target ();
201 t->to_fetch_registers = alphabsd_fetch_inferior_registers;
202 t->to_store_registers = alphabsd_store_inferior_registers;
205 /* Support debugging kernel virtual memory images. */
206 bsd_kvm_add_target (alphabsd_supply_pcb);