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lynx-ppc-low.c
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1 /* Copyright (C) 2009-2015 Free Software Foundation, Inc.
2 
3  This file is part of GDB.
4 
5  This program is free software; you can redistribute it and/or modify
6  it under the terms of the GNU General Public License as published by
7  the Free Software Foundation; either version 3 of the License, or
8  (at your option) any later version.
9 
10  This program is distributed in the hope that it will be useful,
11  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  GNU General Public License for more details.
14 
15  You should have received a copy of the GNU General Public License
16  along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 
18 #include "server.h"
19 #include "lynx-low.h"
20 #include <limits.h>
21 #include <sys/ptrace.h>
22 
23 /* The following two typedefs are defined in a .h file which is not
24  in the standard include path (/sys/include/family/ppc/ucontext.h),
25  so we just duplicate them here. */
26 
27 /* General register context */
28 typedef struct usr_econtext_s
29 {
30  uint32_t uec_iregs[32];
31  uint32_t uec_inum;
32  uint32_t uec_srr0;
33  uint32_t uec_srr1;
34  uint32_t uec_lr;
35  uint32_t uec_ctr;
36  uint32_t uec_cr;
37  uint32_t uec_xer;
38  uint32_t uec_dar;
39  uint32_t uec_mq;
40  uint32_t uec_msr;
41  uint32_t uec_sregs[16];
42  uint32_t uec_ss_count;
43  uint32_t uec_ss_addr1;
44  uint32_t uec_ss_addr2;
45  uint32_t uec_ss_code1;
46  uint32_t uec_ss_code2;
48 
49 /* Floating point register context */
50 typedef struct usr_fcontext_s
51 {
52  uint64_t ufc_freg[32];
53  uint32_t ufc_fpscr[2];
55 
56 /* Index of for various registers inside the regcache. */
57 #define R0_REGNUM 0
58 #define F0_REGNUM 32
59 #define PC_REGNUM 64
60 #define MSR_REGNUM 65
61 #define CR_REGNUM 66
62 #define LR_REGNUM 67
63 #define CTR_REGNUM 68
64 #define XER_REGNUM 69
65 #define FPSCR_REGNUM 70
66 
67 /* Defined in auto-generated file powerpc-32.c. */
68 extern void init_registers_powerpc_32 (void);
69 extern const struct target_desc *tdesc_powerpc_32;
70 
71 /* The fill_function for the general-purpose register set. */
72 
73 static void
75 {
76  int i;
77 
78  /* r0 - r31 */
79  for (i = 0; i < 32; i++)
80  collect_register (regcache, R0_REGNUM + i,
81  buf + offsetof (usr_econtext_t, uec_iregs[i]));
82 
83  /* The other registers provided in the GP register context. */
84  collect_register (regcache, PC_REGNUM,
85  buf + offsetof (usr_econtext_t, uec_srr0));
86  collect_register (regcache, MSR_REGNUM,
87  buf + offsetof (usr_econtext_t, uec_srr1));
88  collect_register (regcache, CR_REGNUM,
89  buf + offsetof (usr_econtext_t, uec_cr));
90  collect_register (regcache, LR_REGNUM,
91  buf + offsetof (usr_econtext_t, uec_lr));
92  collect_register (regcache, CTR_REGNUM,
93  buf + offsetof (usr_econtext_t, uec_ctr));
94  collect_register (regcache, XER_REGNUM,
95  buf + offsetof (usr_econtext_t, uec_xer));
96 }
97 
98 /* The store_function for the general-purpose register set. */
99 
100 static void
101 lynx_ppc_store_gregset (struct regcache *regcache, const char *buf)
102 {
103  int i;
104 
105  /* r0 - r31 */
106  for (i = 0; i < 32; i++)
107  supply_register (regcache, R0_REGNUM + i,
108  buf + offsetof (usr_econtext_t, uec_iregs[i]));
109 
110  /* The other registers provided in the GP register context. */
111  supply_register (regcache, PC_REGNUM,
112  buf + offsetof (usr_econtext_t, uec_srr0));
113  supply_register (regcache, MSR_REGNUM,
114  buf + offsetof (usr_econtext_t, uec_srr1));
115  supply_register (regcache, CR_REGNUM,
116  buf + offsetof (usr_econtext_t, uec_cr));
117  supply_register (regcache, LR_REGNUM,
118  buf + offsetof (usr_econtext_t, uec_lr));
119  supply_register (regcache, CTR_REGNUM,
120  buf + offsetof (usr_econtext_t, uec_ctr));
121  supply_register (regcache, XER_REGNUM,
122  buf + offsetof (usr_econtext_t, uec_xer));
123 }
124 
125 /* The fill_function for the floating-point register set. */
126 
127 static void
129 {
130  int i;
131 
132  /* f0 - f31 */
133  for (i = 0; i < 32; i++)
134  collect_register (regcache, F0_REGNUM + i,
135  buf + offsetof (usr_fcontext_t, ufc_freg[i]));
136 
137  /* fpscr */
138  collect_register (regcache, FPSCR_REGNUM,
139  buf + offsetof (usr_fcontext_t, ufc_fpscr));
140 }
141 
142 /* The store_function for the floating-point register set. */
143 
144 static void
145 lynx_ppc_store_fpregset (struct regcache *regcache, const char *buf)
146 {
147  int i;
148 
149  /* f0 - f31 */
150  for (i = 0; i < 32; i++)
151  supply_register (regcache, F0_REGNUM + i,
152  buf + offsetof (usr_fcontext_t, ufc_freg[i]));
153 
154  /* fpscr */
155  supply_register (regcache, FPSCR_REGNUM,
156  buf + offsetof (usr_fcontext_t, ufc_fpscr));
157 }
158 
159 /* Implements the lynx_target_ops.arch_setup routine. */
160 
161 static void
163 {
166 }
167 
168 /* Description of all the powerpc-lynx register sets. */
169 
170 struct lynx_regset_info lynx_target_regsets[] = {
171  /* General Purpose Registers. */
172  {PTRACE_GETREGS, PTRACE_SETREGS, sizeof(usr_econtext_t),
174  /* Floating Point Registers. */
175  { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof(usr_fcontext_t),
177  /* End of list marker. */
178  {0, 0, -1, NULL, NULL }
179 };
180 
181 /* The lynx_target_ops vector for powerpc-lynxos. */
182 
183 struct lynx_target_ops the_low_target = {
185 };
uint32_t uec_xer
Definition: lynx-ppc-low.c:37
uint32_t uec_dar
Definition: lynx-ppc-low.c:38
void collect_register(struct regcache *regcache, int n, void *buf)
Definition: regcache.c:414
uint32_t uec_cr
Definition: lynx-ppc-low.c:36
#define MSR_REGNUM
Definition: lynx-ppc-low.c:60
uint32_t uec_msr
Definition: lynx-ppc-low.c:40
uint32_t ufc_fpscr[2]
Definition: lynx-ppc-low.c:53
uint32_t uec_srr1
Definition: lynx-ppc-low.c:33
uint32_t uec_ctr
Definition: lynx-ppc-low.c:35
#define FPSCR_REGNUM
Definition: lynx-ppc-low.c:65
#define CTR_REGNUM
Definition: lynx-ppc-low.c:63
uint32_t uec_ss_count
Definition: lynx-ppc-low.c:42
uint32_t uec_srr0
Definition: lynx-ppc-low.c:32
#define PC_REGNUM
Definition: lynx-ppc-low.c:59
uint32_t uec_lr
Definition: lynx-ppc-low.c:34
uint32_t uec_sregs[16]
Definition: lynx-ppc-low.c:41
static void lynx_ppc_fill_fpregset(struct regcache *regcache, char *buf)
Definition: lynx-ppc-low.c:128
#define F0_REGNUM
Definition: lynx-ppc-low.c:58
#define LR_REGNUM
Definition: lynx-ppc-low.c:62
uint32_t uec_ss_code2
Definition: lynx-ppc-low.c:46
#define CR_REGNUM
Definition: lynx-ppc-low.c:61
const struct target_desc * lynx_tdesc
Definition: lynx-low.c:34
uint64_t ufc_freg[32]
Definition: lynx-ppc-low.c:52
const struct target_desc * tdesc_powerpc_32
void init_registers_powerpc_32(void)
static void lynx_ppc_fill_gregset(struct regcache *regcache, char *buf)
Definition: lynx-ppc-low.c:74
uint32_t uec_ss_addr2
Definition: lynx-ppc-low.c:44
static void lynx_ppc_store_gregset(struct regcache *regcache, const char *buf)
Definition: lynx-ppc-low.c:101
static void lynx_ppc_arch_setup(void)
Definition: lynx-ppc-low.c:162
uint32_t uec_ss_code1
Definition: lynx-ppc-low.c:45
static void lynx_ppc_store_fpregset(struct regcache *regcache, const char *buf)
Definition: lynx-ppc-low.c:145
uint32_t uec_iregs[32]
Definition: lynx-ppc-low.c:30
uint32_t uec_ss_addr1
Definition: lynx-ppc-low.c:43
#define XER_REGNUM
Definition: lynx-ppc-low.c:64
uint32_t uec_inum
Definition: lynx-ppc-low.c:31
void supply_register(struct regcache *regcache, int n, const void *buf)
Definition: regcache.c:330
struct usr_econtext_s usr_econtext_t
uint32_t uec_mq
Definition: lynx-ppc-low.c:39
#define R0_REGNUM
Definition: lynx-ppc-low.c:57
struct usr_fcontext_s usr_fcontext_t