1 /* GNU/Linux/PowerPC specific low level interface, for the remote server for
3 Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2005, 2007, 2008
4 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/>. */
22 #include "linux-low.h"
24 #include <asm/ptrace.h>
26 /* Defined in auto-generated file reg-ppc.c. */
27 void init_registers_ppc (void);
28 /* Defined in auto-generated file powerpc-32.c. */
29 void init_registers_powerpc_32 (void);
30 /* Defined in auto-generated file powerpc-e500.c. */
31 void init_registers_powerpc_e500 (void);
32 /* Defined in auto-generated file reg-ppc64.c. */
33 void init_registers_ppc64 (void);
34 /* Defined in auto-generated file powerpc-64.c. */
35 void init_registers_powerpc_64 (void);
37 #define ppc_num_regs 71
40 /* We use a constant for FPSCR instead of PT_FPSCR, because
41 many shipped PPC64 kernels had the wrong value in ptrace.h. */
42 static int ppc_regmap[] =
43 {PT_R0 * 8, PT_R1 * 8, PT_R2 * 8, PT_R3 * 8,
44 PT_R4 * 8, PT_R5 * 8, PT_R6 * 8, PT_R7 * 8,
45 PT_R8 * 8, PT_R9 * 8, PT_R10 * 8, PT_R11 * 8,
46 PT_R12 * 8, PT_R13 * 8, PT_R14 * 8, PT_R15 * 8,
47 PT_R16 * 8, PT_R17 * 8, PT_R18 * 8, PT_R19 * 8,
48 PT_R20 * 8, PT_R21 * 8, PT_R22 * 8, PT_R23 * 8,
49 PT_R24 * 8, PT_R25 * 8, PT_R26 * 8, PT_R27 * 8,
50 PT_R28 * 8, PT_R29 * 8, PT_R30 * 8, PT_R31 * 8,
51 PT_FPR0*8, PT_FPR0*8 + 8, PT_FPR0*8+16, PT_FPR0*8+24,
52 PT_FPR0*8+32, PT_FPR0*8+40, PT_FPR0*8+48, PT_FPR0*8+56,
53 PT_FPR0*8+64, PT_FPR0*8+72, PT_FPR0*8+80, PT_FPR0*8+88,
54 PT_FPR0*8+96, PT_FPR0*8+104, PT_FPR0*8+112, PT_FPR0*8+120,
55 PT_FPR0*8+128, PT_FPR0*8+136, PT_FPR0*8+144, PT_FPR0*8+152,
56 PT_FPR0*8+160, PT_FPR0*8+168, PT_FPR0*8+176, PT_FPR0*8+184,
57 PT_FPR0*8+192, PT_FPR0*8+200, PT_FPR0*8+208, PT_FPR0*8+216,
58 PT_FPR0*8+224, PT_FPR0*8+232, PT_FPR0*8+240, PT_FPR0*8+248,
59 PT_NIP * 8, PT_MSR * 8, PT_CCR * 8, PT_LNK * 8,
60 PT_CTR * 8, PT_XER * 8, PT_FPR0*8 + 256 };
62 /* Currently, don't check/send MQ. */
63 static int ppc_regmap[] =
64 {PT_R0 * 4, PT_R1 * 4, PT_R2 * 4, PT_R3 * 4,
65 PT_R4 * 4, PT_R5 * 4, PT_R6 * 4, PT_R7 * 4,
66 PT_R8 * 4, PT_R9 * 4, PT_R10 * 4, PT_R11 * 4,
67 PT_R12 * 4, PT_R13 * 4, PT_R14 * 4, PT_R15 * 4,
68 PT_R16 * 4, PT_R17 * 4, PT_R18 * 4, PT_R19 * 4,
69 PT_R20 * 4, PT_R21 * 4, PT_R22 * 4, PT_R23 * 4,
70 PT_R24 * 4, PT_R25 * 4, PT_R26 * 4, PT_R27 * 4,
71 PT_R28 * 4, PT_R29 * 4, PT_R30 * 4, PT_R31 * 4,
82 PT_FPR0*4, PT_FPR0*4 + 8, PT_FPR0*4+16, PT_FPR0*4+24,
83 PT_FPR0*4+32, PT_FPR0*4+40, PT_FPR0*4+48, PT_FPR0*4+56,
84 PT_FPR0*4+64, PT_FPR0*4+72, PT_FPR0*4+80, PT_FPR0*4+88,
85 PT_FPR0*4+96, PT_FPR0*4+104, PT_FPR0*4+112, PT_FPR0*4+120,
86 PT_FPR0*4+128, PT_FPR0*4+136, PT_FPR0*4+144, PT_FPR0*4+152,
87 PT_FPR0*4+160, PT_FPR0*4+168, PT_FPR0*4+176, PT_FPR0*4+184,
88 PT_FPR0*4+192, PT_FPR0*4+200, PT_FPR0*4+208, PT_FPR0*4+216,
89 PT_FPR0*4+224, PT_FPR0*4+232, PT_FPR0*4+240, PT_FPR0*4+248,
91 PT_NIP * 4, PT_MSR * 4, PT_CCR * 4, PT_LNK * 4,
93 PT_CTR * 4, PT_XER * 4, -1
95 PT_CTR * 4, PT_XER * 4, PT_FPSCR * 4
101 ppc_cannot_store_register (int regno)
103 #if !defined (__powerpc64__) && !defined (__SPE__)
104 /* Some kernels do not allow us to store fpscr. */
105 if (regno == find_regno ("fpscr"))
113 ppc_cannot_fetch_register (int regno)
119 ppc_collect_ptrace_register (int regno, char *buf)
121 int size = register_size (regno);
122 if (size < sizeof (long))
123 collect_register (regno, buf + sizeof (long) - size);
125 collect_register (regno, buf);
129 ppc_supply_ptrace_register (int regno, const char *buf)
131 int size = register_size (regno);
132 if (size < sizeof (long))
133 supply_register (regno, buf + sizeof (long) - size);
135 supply_register (regno, buf);
143 collect_register_by_name ("pc", &pc);
144 return (CORE_ADDR) pc;
148 ppc_set_pc (CORE_ADDR pc)
150 unsigned long newpc = pc;
152 supply_register_by_name ("pc", &newpc);
155 /* Correct in either endianness.
156 This instruction is "twge r2, r2", which GDB uses as a software
158 static const unsigned int ppc_breakpoint = 0x7d821008;
159 #define ppc_breakpoint_len 4
162 ppc_breakpoint_at (CORE_ADDR where)
166 (*the_target->read_memory) (where, (unsigned char *) &insn, 4);
167 if (insn == ppc_breakpoint)
169 /* If necessary, recognize more trap instructions here. GDB only uses the
174 /* Provide only a fill function for the general register set. ps_lgetregs
175 will use this for NPTL support. */
177 static void ppc_fill_gregset (void *buf)
181 for (i = 0; i < 32; i++)
182 collect_register (i, (char *) buf + ppc_regmap[i]);
184 for (i = 64; i < 70; i++)
185 collect_register (i, (char *) buf + ppc_regmap[i]);
190 #ifndef PTRACE_GETVRREGS
191 #define PTRACE_GETVRREGS 18
192 #define PTRACE_SETVRREGS 19
195 #define SIZEOF_VRREGS 33*16+4
198 ppc_fill_vrregset (void *buf)
203 base = find_regno ("vr0");
204 for (i = 0; i < 32; i++)
205 collect_register (base + i, ®set[i * 16]);
207 collect_register_by_name ("vscr", ®set[32 * 16 + 12]);
208 collect_register_by_name ("vrsave", ®set[33 * 16]);
212 ppc_store_vrregset (const void *buf)
215 const char *regset = buf;
217 base = find_regno ("vr0");
218 for (i = 0; i < 32; i++)
219 supply_register (base + i, ®set[i * 16]);
221 supply_register_by_name ("vscr", ®set[32 * 16 + 12]);
222 supply_register_by_name ("vrsave", ®set[33 * 16]);
225 #endif /* __ALTIVEC__ */
229 #ifndef PTRACE_GETEVRREGS
230 #define PTRACE_GETEVRREGS 20
231 #define PTRACE_SETEVRREGS 21
234 struct gdb_evrregset_t
236 unsigned long evr[32];
237 unsigned long long acc;
238 unsigned long spefscr;
242 ppc_fill_evrregset (void *buf)
245 struct gdb_evrregset_t *regset = buf;
247 ev0 = find_regno ("ev0h");
248 for (i = 0; i < 32; i++)
249 collect_register (ev0 + i, ®set->evr[i]);
251 collect_register_by_name ("acc", ®set->acc);
252 collect_register_by_name ("spefscr", ®set->spefscr);
256 ppc_store_evrregset (const void *buf)
259 const struct gdb_evrregset_t *regset = buf;
261 ev0 = find_regno ("ev0h");
262 for (i = 0; i < 32; i++)
263 supply_register (ev0 + i, ®set->evr[i]);
265 supply_register_by_name ("acc", ®set->acc);
266 supply_register_by_name ("spefscr", ®set->spefscr);
270 struct regset_info target_regsets[] = {
271 /* List the extra register sets before GENERAL_REGS. That way we will
272 fetch them every time, but still fall back to PTRACE_PEEKUSER for the
273 general registers. Some kernels support these, but not the newer
274 PPC_PTRACE_GETREGS. */
276 { PTRACE_GETVRREGS, PTRACE_SETVRREGS, SIZEOF_VRREGS, EXTENDED_REGS,
277 ppc_fill_vrregset, ppc_store_vrregset },
280 { PTRACE_GETEVRREGS, PTRACE_SETEVRREGS, 32 * 4 + 8 + 4, EXTENDED_REGS,
281 ppc_fill_evrregset, ppc_store_evrregset },
283 { 0, 0, 0, GENERAL_REGS, ppc_fill_gregset, NULL },
284 { 0, 0, -1, -1, NULL, NULL }
287 struct linux_target_ops the_low_target = {
290 init_registers_powerpc_64,
292 init_registers_ppc64,
296 init_registers_powerpc_32,
299 init_registers_powerpc_e500,
307 ppc_cannot_fetch_register,
308 ppc_cannot_store_register,
311 (const unsigned char *) &ppc_breakpoint,
320 ppc_collect_ptrace_register,
321 ppc_supply_ptrace_register,