1 /* Ravenscar PowerPC target support.
3 Copyright (C) 2011-2013 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
25 #include "ravenscar-thread.h"
26 #include "ppc-ravenscar-thread.h"
30 /* See ppc-tdep.h for register numbers. */
32 static const int powerpc_context_offsets[] =
35 NO_OFFSET, 0, 4, NO_OFFSET,
36 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
37 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
45 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
46 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
47 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
48 NO_OFFSET, NO_OFFSET, 96, 104,
55 88, NO_OFFSET, 84, NO_OFFSET,
58 NO_OFFSET, NO_OFFSET, 240
61 static const int e500_context_offsets[] =
64 NO_OFFSET, 4, 12, NO_OFFSET,
65 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
66 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
67 NO_OFFSET, 20, 28, 36,
74 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
75 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
76 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
77 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
78 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
79 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
80 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
81 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
84 172, NO_OFFSET, 168, NO_OFFSET,
86 /* CTR, XER, FPSCR, MQ */
87 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
90 NO_OFFSET, 0, 8, NO_OFFSET,
91 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
92 NO_OFFSET, NO_OFFSET, NO_OFFSET, NO_OFFSET,
93 NO_OFFSET, 16, 24, 32,
103 /* The register layout info. */
105 struct ravenscar_reg_info
107 /* A table providing the offset relative to the context structure
108 where each register is saved. */
109 const int *context_offsets;
111 /* The number of elements in the context_offsets table above. */
112 int context_offsets_size;
115 /* supply register REGNUM, which has been saved on REGISTER_ADDR, to the
119 supply_register_at_address (struct regcache *regcache, int regnum,
120 CORE_ADDR register_addr)
122 struct gdbarch *gdbarch = get_regcache_arch (regcache);
123 int buf_size = register_size (gdbarch, regnum);
126 buf = alloca (buf_size);
127 read_memory (register_addr, buf, buf_size);
128 regcache_raw_supply (regcache, regnum, buf);
131 /* Return true if, for a non-running thread, REGNUM has been saved on the
132 Thread_Descriptor. */
135 register_in_thread_descriptor_p (const struct ravenscar_reg_info *reg_info,
138 return (regnum < reg_info->context_offsets_size
139 && reg_info->context_offsets[regnum] != NO_OFFSET);
142 /* to_fetch_registers when inferior_ptid is different from the running
146 ppc_ravenscar_generic_fetch_registers
147 (const struct ravenscar_reg_info *reg_info,
148 struct regcache *regcache, int regnum)
150 struct gdbarch *gdbarch = get_regcache_arch (regcache);
151 const int sp_regnum = gdbarch_sp_regnum (gdbarch);
152 const int num_regs = gdbarch_num_regs (gdbarch);
154 CORE_ADDR current_address;
155 CORE_ADDR thread_descriptor_address;
157 /* The tid is the thread_id field, which is a pointer to the thread. */
158 thread_descriptor_address = (CORE_ADDR) ptid_get_tid (inferior_ptid);
160 /* Read registers. */
161 for (current_regnum = 0; current_regnum < num_regs; current_regnum++)
163 if (register_in_thread_descriptor_p (reg_info, current_regnum))
165 current_address = thread_descriptor_address
166 + reg_info->context_offsets[current_regnum];
167 supply_register_at_address (regcache, current_regnum,
173 /* to_prepare_to_store when inferior_ptid is different from the running
177 ppc_ravenscar_generic_prepare_to_store (struct regcache *regcache)
182 /* to_store_registers when inferior_ptid is different from the running
186 ppc_ravenscar_generic_store_registers
187 (const struct ravenscar_reg_info *reg_info,
188 struct regcache *regcache, int regnum)
190 struct gdbarch *gdbarch = get_regcache_arch (regcache);
191 int buf_size = register_size (gdbarch, regnum);
192 gdb_byte buf[buf_size];
193 ULONGEST register_address;
195 if (register_in_thread_descriptor_p (reg_info, regnum))
197 = ptid_get_tid (inferior_ptid) + reg_info->context_offsets [regnum];
201 regcache_raw_collect (regcache, regnum, buf);
202 write_memory (register_address,
207 /* The ravenscar_reg_info for most PowerPC targets. */
209 static const struct ravenscar_reg_info ppc_reg_info =
211 powerpc_context_offsets,
212 ARRAY_SIZE (powerpc_context_offsets),
215 /* Implement the to_fetch_registers ravenscar_arch_ops method
216 for most PowerPC targets. */
219 ppc_ravenscar_powerpc_fetch_registers (struct regcache *regcache, int regnum)
221 ppc_ravenscar_generic_fetch_registers (&ppc_reg_info, regcache, regnum);
224 /* Implement the to_store_registers ravenscar_arch_ops method
225 for most PowerPC targets. */
228 ppc_ravenscar_powerpc_store_registers (struct regcache *regcache, int regnum)
230 ppc_ravenscar_generic_store_registers (&ppc_reg_info, regcache, regnum);
233 /* The ravenscar_arch_ops vector for most PowerPC targets. */
235 static struct ravenscar_arch_ops ppc_ravenscar_powerpc_ops =
237 ppc_ravenscar_powerpc_fetch_registers,
238 ppc_ravenscar_powerpc_store_registers,
239 ppc_ravenscar_generic_prepare_to_store
242 /* Register ppc_ravenscar_powerpc_ops in GDBARCH. */
245 register_ppc_ravenscar_ops (struct gdbarch *gdbarch)
247 set_gdbarch_ravenscar_ops (gdbarch, &ppc_ravenscar_powerpc_ops);
250 /* The ravenscar_reg_info for E500 targets. */
252 static const struct ravenscar_reg_info e500_reg_info =
254 e500_context_offsets,
255 ARRAY_SIZE (e500_context_offsets),
258 /* Implement the to_fetch_registers ravenscar_arch_ops method
262 ppc_ravenscar_e500_fetch_registers (struct regcache *regcache, int regnum)
264 ppc_ravenscar_generic_fetch_registers (&e500_reg_info, regcache, regnum);
267 /* Implement the to_store_registers ravenscar_arch_ops method
271 ppc_ravenscar_e500_store_registers (struct regcache *regcache, int regnum)
273 ppc_ravenscar_generic_store_registers (&e500_reg_info, regcache, regnum);
276 /* The ravenscar_arch_ops vector for E500 targets. */
278 static struct ravenscar_arch_ops ppc_ravenscar_e500_ops =
280 ppc_ravenscar_e500_fetch_registers,
281 ppc_ravenscar_e500_store_registers,
282 ppc_ravenscar_generic_prepare_to_store
285 /* Register ppc_ravenscar_e500_ops in GDBARCH. */
288 register_e500_ravenscar_ops (struct gdbarch *gdbarch)
290 set_gdbarch_ravenscar_ops (gdbarch, &ppc_ravenscar_e500_ops);