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 #define ppc_num_regs 71
28 /* Currently, don't check/send MQ. */
29 static int ppc_regmap[] =
30 {PT_R0 * 4, PT_R1 * 4, PT_R2 * 4, PT_R3 * 4,
31 PT_R4 * 4, PT_R5 * 4, PT_R6 * 4, PT_R7 * 4,
32 PT_R8 * 4, PT_R9 * 4, PT_R10 * 4, PT_R11 * 4,
33 PT_R12 * 4, PT_R13 * 4, PT_R14 * 4, PT_R15 * 4,
34 PT_R16 * 4, PT_R17 * 4, PT_R18 * 4, PT_R19 * 4,
35 PT_R20 * 4, PT_R21 * 4, PT_R22 * 4, PT_R23 * 4,
36 PT_R24 * 4, PT_R25 * 4, PT_R26 * 4, PT_R27 * 4,
37 PT_R28 * 4, PT_R29 * 4, PT_R30 * 4, PT_R31 * 4,
48 PT_FPR0*4, PT_FPR0*4 + 8, PT_FPR0*4+16, PT_FPR0*4+24,
49 PT_FPR0*4+32, PT_FPR0*4+40, PT_FPR0*4+48, PT_FPR0*4+56,
50 PT_FPR0*4+64, PT_FPR0*4+72, PT_FPR0*4+80, PT_FPR0*4+88,
51 PT_FPR0*4+96, PT_FPR0*4+104, PT_FPR0*4+112, PT_FPR0*4+120,
52 PT_FPR0*4+128, PT_FPR0*4+136, PT_FPR0*4+144, PT_FPR0*4+152,
53 PT_FPR0*4+160, PT_FPR0*4+168, PT_FPR0*4+176, PT_FPR0*4+184,
54 PT_FPR0*4+192, PT_FPR0*4+200, PT_FPR0*4+208, PT_FPR0*4+216,
55 PT_FPR0*4+224, PT_FPR0*4+232, PT_FPR0*4+240, PT_FPR0*4+248,
57 PT_NIP * 4, PT_MSR * 4, PT_CCR * 4, PT_LNK * 4,
59 PT_CTR * 4, PT_XER * 4, -1
61 PT_CTR * 4, PT_XER * 4, PT_FPSCR * 4
66 ppc_cannot_store_register (int regno)
69 /* Some kernels do not allow us to store fpscr. */
70 if (regno == find_regno ("fpscr"))
78 ppc_cannot_fetch_register (int regno)
88 collect_register_by_name ("pc", &pc);
89 return (CORE_ADDR) pc;
93 ppc_set_pc (CORE_ADDR pc)
95 unsigned long newpc = pc;
97 supply_register_by_name ("pc", &newpc);
100 /* Correct in either endianness. Note that this file is
101 for PowerPC only, not PowerPC64.
102 This instruction is "twge r2, r2", which GDB uses as a software
104 static const unsigned long ppc_breakpoint = 0x7d821008;
105 #define ppc_breakpoint_len 4
108 ppc_breakpoint_at (CORE_ADDR where)
112 (*the_target->read_memory) (where, (unsigned char *) &insn, 4);
113 if (insn == ppc_breakpoint)
115 /* If necessary, recognize more trap instructions here. GDB only uses the
120 /* Provide only a fill function for the general register set. ps_lgetregs
121 will use this for NPTL support. */
123 static void ppc_fill_gregset (void *buf)
127 for (i = 0; i < 32; i++)
128 collect_register (i, (char *) buf + ppc_regmap[i]);
130 for (i = 64; i < 70; i++)
131 collect_register (i, (char *) buf + ppc_regmap[i]);
136 #ifndef PTRACE_GETVRREGS
137 #define PTRACE_GETVRREGS 18
138 #define PTRACE_SETVRREGS 19
141 #define SIZEOF_VRREGS 33*16+4
144 ppc_fill_vrregset (void *buf)
149 base = find_regno ("vr0");
150 for (i = 0; i < 32; i++)
151 collect_register (base + i, ®set[i * 16]);
153 collect_register_by_name ("vscr", ®set[32 * 16 + 12]);
154 collect_register_by_name ("vrsave", ®set[33 * 16]);
158 ppc_store_vrregset (const void *buf)
161 const char *regset = buf;
163 base = find_regno ("vr0");
164 for (i = 0; i < 32; i++)
165 supply_register (base + i, ®set[i * 16]);
167 supply_register_by_name ("vscr", ®set[32 * 16 + 12]);
168 supply_register_by_name ("vrsave", ®set[33 * 16]);
171 #endif /* __ALTIVEC__ */
175 #ifndef PTRACE_GETEVRREGS
176 #define PTRACE_GETEVRREGS 20
177 #define PTRACE_SETEVRREGS 21
180 struct gdb_evrregset_t
182 unsigned long evr[32];
183 unsigned long long acc;
184 unsigned long spefscr;
188 ppc_fill_evrregset (void *buf)
191 struct gdb_evrregset_t *regset = buf;
193 ev0 = find_regno ("ev0h");
194 for (i = 0; i < 32; i++)
195 collect_register (ev0 + i, ®set->evr[i]);
197 collect_register_by_name ("acc", ®set->acc);
198 collect_register_by_name ("spefscr", ®set->spefscr);
202 ppc_store_evrregset (const void *buf)
205 const struct gdb_evrregset_t *regset = buf;
207 ev0 = find_regno ("ev0h");
208 for (i = 0; i < 32; i++)
209 supply_register (ev0 + i, ®set->evr[i]);
211 supply_register_by_name ("acc", ®set->acc);
212 supply_register_by_name ("spefscr", ®set->spefscr);
216 struct regset_info target_regsets[] = {
217 /* List the extra register sets before GENERAL_REGS. That way we will
218 fetch them every time, but still fall back to PTRACE_PEEKUSER for the
219 general registers. Some kernels support these, but not the newer
220 PPC_PTRACE_GETREGS. */
222 { PTRACE_GETVRREGS, PTRACE_SETVRREGS, SIZEOF_VRREGS, EXTENDED_REGS,
223 ppc_fill_vrregset, ppc_store_vrregset },
226 { PTRACE_GETEVRREGS, PTRACE_SETEVRREGS, 32 * 4 + 8 + 4, EXTENDED_REGS,
227 ppc_fill_evrregset, ppc_store_evrregset },
229 { 0, 0, 0, GENERAL_REGS, ppc_fill_gregset, NULL },
230 { 0, 0, -1, -1, NULL, NULL }
233 struct linux_target_ops the_low_target = {
236 ppc_cannot_fetch_register,
237 ppc_cannot_store_register,
240 (const unsigned char *) &ppc_breakpoint,