1 /* Native-dependent code for Alpha BSD's.
2 Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
25 #include "alpha-tdep.h"
27 #include <sys/types.h>
28 #include <sys/ptrace.h>
29 #include <machine/reg.h>
31 #ifdef HAVE_SYS_PROCFS_H
32 #include <sys/procfs.h>
35 #ifndef HAVE_GREGSET_T
36 typedef struct reg gregset_t;
39 #ifndef HAVE_FPREGSET_T
40 typedef struct fpreg fpregset_t;
45 /* Number of general-purpose registers. */
48 /* Number of floating point registers. */
52 /* Transfering the registers between GDB, inferiors and core files. */
54 /* Fill GDB's register array with the general-purpose register values
58 supply_gregset (gregset_t *gregsetp)
62 for (i = 0; i < NUM_GREGS; i++)
64 if (CANNOT_FETCH_REGISTER (i))
65 supply_register (i, NULL);
67 supply_register (i, (char *) &gregsetp->r_regs[i]);
70 /* The PC travels in the R_ZERO slot. */
71 supply_register (PC_REGNUM, (char *) &gregsetp->r_regs[R_ZERO]);
74 /* Fill register REGNO (if it is a general-purpose register) in
75 *GREGSETPS with the value in GDB's register array. If REGNO is -1,
76 do this for all registers. */
79 fill_gregset (gregset_t *gregsetp, int regno)
83 for (i = 0; i < NUM_GREGS; i++)
84 if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i))
85 regcache_collect (i, (char *) &gregsetp->r_regs[i]);
87 /* The PC travels in the R_ZERO slot. */
88 if (regno == -1 || regno == PC_REGNUM)
89 regcache_collect (PC_REGNUM, (char *) &gregsetp->r_regs[R_ZERO]);
92 /* Fill GDB's register array with the floating-point register values
96 supply_fpregset (fpregset_t *fpregsetp)
100 for (i = FP0_REGNUM; i < FP0_REGNUM + NUM_FPREGS; i++)
102 if (CANNOT_FETCH_REGISTER (i))
103 supply_register (i, NULL);
105 supply_register (i, (char *) &fpregsetp->fpr_regs[i - FP0_REGNUM]);
108 supply_register (ALPHA_FPCR_REGNUM, (char *) &fpregsetp->fpr_cr);
111 /* Fill register REGNO (if it is a floating-point register) in
112 *FPREGSETP with the value in GDB's register array. If REGNO is -1,
113 do this for all registers. */
116 fill_fpregset (fpregset_t *fpregsetp, int regno)
120 for (i = FP0_REGNUM; i < FP0_REGNUM + NUM_FPREGS; i++)
121 if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i))
122 regcache_collect (i, (char *) &fpregsetp->fpr_regs[i - FP0_REGNUM]);
124 if (regno == -1 || regno == ALPHA_FPCR_REGNUM)
125 regcache_collect (ALPHA_FPCR_REGNUM, (char *) &fpregsetp->fpr_cr);
129 /* Determine if PT_GETREGS fetches this register. */
132 getregs_supplies (int regno)
135 return ((regno >= ALPHA_V0_REGNUM && regno <= ALPHA_ZERO_REGNUM)
136 || regno >= PC_REGNUM);
140 /* Fetch register REGNO from the inferior. If REGNO is -1, do this
141 for all registers (including the floating point registers). */
144 fetch_inferior_registers (int regno)
147 if (regno == -1 || getregs_supplies (regno))
151 if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
152 (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
153 perror_with_name ("Couldn't get registers");
155 supply_gregset (&gregs);
160 if (regno == -1 || regno >= FP0_REGNUM)
164 if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
165 (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
166 perror_with_name ("Couldn't get floating point status");
168 supply_fpregset (&fpregs);
171 /* Reset virtual frame pointer. */
172 supply_register (FP_REGNUM, NULL);
175 /* Store register REGNO back into the inferior. If REGNO is -1, do
176 this for all registers (including the floating point registers). */
179 store_inferior_registers (int regno)
182 if (regno == -1 || getregs_supplies (regno))
185 if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
186 (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
187 perror_with_name ("Couldn't get registers");
189 fill_gregset (&gregs, regno);
191 if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
192 (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
193 perror_with_name ("Couldn't write registers");
199 if (regno == -1 || regno >= FP0_REGNUM)
203 if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
204 (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
205 perror_with_name ("Couldn't get floating point status");
207 fill_fpregset (&fpregs, regno);
209 if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
210 (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
211 perror_with_name ("Couldn't write floating point status");