1 /* Native-dependent code for NetBSD/sparc64.
2
3 Copyright (C) 2003-2013 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
28 /* NetBSD is different from the other OSes that support both SPARC and
29 UltraSPARC in that the result of ptrace(2) depends on whether the
30 traced process is 32-bit or 64-bit. */
31
32 static void
sparc64nbsd_supply_gregset(const struct sparc_gregset * gregset,struct regcache * regcache,int regnum,const void * gregs)33 sparc64nbsd_supply_gregset (const struct sparc_gregset *gregset,
34 struct regcache *regcache,
35 int regnum, const void *gregs)
36 {
37 int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32);
38
39 if (sparc32)
40 sparc32_supply_gregset (&sparc32nbsd_gregset, regcache, regnum, gregs);
41 else
42 sparc64_supply_gregset (&sparc64nbsd_gregset, regcache, regnum, gregs);
43 }
44
45 static void
sparc64nbsd_collect_gregset(const struct sparc_gregset * gregset,const struct regcache * regcache,int regnum,void * gregs)46 sparc64nbsd_collect_gregset (const struct sparc_gregset *gregset,
47 const struct regcache *regcache,
48 int regnum, void *gregs)
49 {
50 int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32);
51
52 if (sparc32)
53 sparc32_collect_gregset (&sparc32nbsd_gregset, regcache, regnum, gregs);
54 else
55 sparc64_collect_gregset (&sparc64nbsd_gregset, regcache, regnum, gregs);
56 }
57
58 static void
sparc64nbsd_supply_fpregset(const struct sparc_fpregset * fpregset,struct regcache * regcache,int regnum,const void * fpregs)59 sparc64nbsd_supply_fpregset (const struct sparc_fpregset *fpregset,
60 struct regcache *regcache,
61 int regnum, const void *fpregs)
62 {
63 int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32);
64
65 if (sparc32)
66 sparc32_supply_fpregset (&sparc32_bsd_fpregset, regcache, regnum, fpregs);
67 else
68 sparc64_supply_fpregset (&sparc64_bsd_fpregset, regcache, regnum, fpregs);
69 }
70
71 static void
sparc64nbsd_collect_fpregset(const struct regcache * regcache,int regnum,void * fpregs)72 sparc64nbsd_collect_fpregset (const struct regcache *regcache,
73 int regnum, void *fpregs)
74 {
75 int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32);
76
77 if (sparc32)
78 sparc32_collect_fpregset (&sparc32_bsd_fpregset, regcache, regnum, fpregs);
79 else
80 sparc64_collect_fpregset (&sparc64_bsd_fpregset, regcache, regnum, fpregs);
81 }
82
83 /* Determine whether `gregset_t' contains register REGNUM. */
84
85 static int
sparc64nbsd_gregset_supplies_p(struct gdbarch * gdbarch,int regnum)86 sparc64nbsd_gregset_supplies_p (struct gdbarch *gdbarch, int regnum)
87 {
88 if (gdbarch_ptr_bit (gdbarch) == 32)
89 return sparc32_gregset_supplies_p (gdbarch, regnum);
90
91 /* Integer registers. */
92 if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM)
93 || (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM)
94 || (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM)
95 || (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM))
96 return 1;
97
98 /* Control registers. */
99 if (regnum == SPARC64_PC_REGNUM
100 || regnum == SPARC64_NPC_REGNUM
101 || regnum == SPARC64_STATE_REGNUM
102 || regnum == SPARC64_Y_REGNUM)
103 return 1;
104
105 return 0;
106 }
107
108 /* Determine whether `fpregset_t' contains register REGNUM. */
109
110 static int
sparc64nbsd_fpregset_supplies_p(struct gdbarch * gdbarch,int regnum)111 sparc64nbsd_fpregset_supplies_p (struct gdbarch *gdbarch, int regnum)
112 {
113 if (gdbarch_ptr_bit (gdbarch) == 32)
114 return sparc32_fpregset_supplies_p (gdbarch, regnum);
115
116 /* Floating-point registers. */
117 if ((regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM)
118 || (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM))
119 return 1;
120
121 /* Control registers. */
122 if (regnum == SPARC64_FSR_REGNUM)
123 return 1;
124
125 return 0;
126 }
127
128
129 /* Support for debugging kernel virtual memory images. */
130
131 #include <sys/types.h>
132 #include <machine/pcb.h>
133
134 #include "bsd-kvm.h"
135
136 static int
sparc64nbsd_supply_pcb(struct regcache * regcache,struct pcb * pcb)137 sparc64nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
138 {
139 u_int64_t state;
140 int regnum;
141
142 /* The following is true for NetBSD 1.6.2:
143
144 The pcb contains %sp and %pc, %pstate and %cwp. From this
145 information we reconstruct the register state as it would look
146 when we just returned from cpu_switch(). */
147
148 /* The stack pointer shouldn't be zero. */
149 if (pcb->pcb_sp == 0)
150 return 0;
151
152 /* If the program counter is zero, this is probably a core dump, and
153 we can get %pc from the stack. */
154 if (pcb->pcb_pc == 0)
155 read_memory(pcb->pcb_sp + BIAS - 176 + (11 * 8),
156 (gdb_byte *)&pcb->pcb_pc, sizeof pcb->pcb_pc);
157
158 regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp);
159 regcache_raw_supply (regcache, SPARC64_PC_REGNUM, &pcb->pcb_pc);
160
161 state = pcb->pcb_pstate << 8 | pcb->pcb_cwp;
162 regcache_raw_supply (regcache, SPARC64_STATE_REGNUM, &state);
163
164 sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);
165
166 return 1;
167 }
168
169
170 /* Provide a prototype to silence -Wmissing-prototypes. */
171 void _initialize_sparc64nbsd_nat (void);
172
173 void
_initialize_sparc64nbsd_nat(void)174 _initialize_sparc64nbsd_nat (void)
175 {
176 sparc_supply_gregset = sparc64nbsd_supply_gregset;
177 sparc_collect_gregset = sparc64nbsd_collect_gregset;
178 sparc_supply_fpregset = sparc64nbsd_supply_fpregset;
179 sparc_collect_fpregset = sparc64nbsd_collect_fpregset;
180 sparc_gregset_supplies_p = sparc64nbsd_gregset_supplies_p;
181 sparc_fpregset_supplies_p = sparc64nbsd_fpregset_supplies_p;
182
183 /* We've got nothing to add to the generic SPARC target. */
184 add_target (sparc_target ());
185
186 /* Support debugging kernel virtual memory images. */
187 bsd_kvm_add_target (sparc64nbsd_supply_pcb);
188 }
189