1 /* Target-dependent code for Solaris SPARC.
2
3 Copyright (C) 2003-2024 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 "frame.h"
21 #include "frame-unwind.h"
22 #include "gdbcore.h"
23 #include "symtab.h"
24 #include "objfiles.h"
25 #include "osabi.h"
26 #include "regcache.h"
27 #include "regset.h"
28 #include "target.h"
29 #include "trad-frame.h"
30
31 #include "sol2-tdep.h"
32 #include "sparc-tdep.h"
33 #include "solib-svr4.h"
34
35 /* From <sys/regset.h>. */
36 const struct sparc_gregmap sparc32_sol2_gregmap =
37 {
38 32 * 4, /* %psr */
39 33 * 4, /* %pc */
40 34 * 4, /* %npc */
41 35 * 4, /* %y */
42 36 * 4, /* %wim */
43 37 * 4, /* %tbr */
44 1 * 4, /* %g1 */
45 16 * 4, /* %l0 */
46 };
47
48 const struct sparc_fpregmap sparc32_sol2_fpregmap =
49 {
50 0 * 4, /* %f0 */
51 33 * 4, /* %fsr */
52 };
53
54 static void
sparc32_sol2_supply_core_gregset(const struct regset * regset,struct regcache * regcache,int regnum,const void * gregs,size_t len)55 sparc32_sol2_supply_core_gregset (const struct regset *regset,
56 struct regcache *regcache,
57 int regnum, const void *gregs, size_t len)
58 {
59 sparc32_supply_gregset (&sparc32_sol2_gregmap, regcache, regnum, gregs);
60 }
61
62 static void
sparc32_sol2_collect_core_gregset(const struct regset * regset,const struct regcache * regcache,int regnum,void * gregs,size_t len)63 sparc32_sol2_collect_core_gregset (const struct regset *regset,
64 const struct regcache *regcache,
65 int regnum, void *gregs, size_t len)
66 {
67 sparc32_collect_gregset (&sparc32_sol2_gregmap, regcache, regnum, gregs);
68 }
69
70 static void
sparc32_sol2_supply_core_fpregset(const struct regset * regset,struct regcache * regcache,int regnum,const void * fpregs,size_t len)71 sparc32_sol2_supply_core_fpregset (const struct regset *regset,
72 struct regcache *regcache,
73 int regnum, const void *fpregs, size_t len)
74 {
75 sparc32_supply_fpregset (&sparc32_sol2_fpregmap, regcache, regnum, fpregs);
76 }
77
78 static void
sparc32_sol2_collect_core_fpregset(const struct regset * regset,const struct regcache * regcache,int regnum,void * fpregs,size_t len)79 sparc32_sol2_collect_core_fpregset (const struct regset *regset,
80 const struct regcache *regcache,
81 int regnum, void *fpregs, size_t len)
82 {
83 sparc32_collect_fpregset (&sparc32_sol2_fpregmap, regcache, regnum, fpregs);
84 }
85
86 static const struct regset sparc32_sol2_gregset =
87 {
88 NULL,
89 sparc32_sol2_supply_core_gregset,
90 sparc32_sol2_collect_core_gregset
91 };
92
93 static const struct regset sparc32_sol2_fpregset =
94 {
95 NULL,
96 sparc32_sol2_supply_core_fpregset,
97 sparc32_sol2_collect_core_fpregset
98 };
99
100
101 static struct sparc_frame_cache *
sparc32_sol2_sigtramp_frame_cache(const frame_info_ptr & this_frame,void ** this_cache)102 sparc32_sol2_sigtramp_frame_cache (const frame_info_ptr &this_frame,
103 void **this_cache)
104 {
105 struct sparc_frame_cache *cache;
106 CORE_ADDR mcontext_addr, addr;
107 int regnum;
108
109 if (*this_cache)
110 return (struct sparc_frame_cache *) *this_cache;
111
112 cache = sparc_frame_cache (this_frame, this_cache);
113 gdb_assert (cache == *this_cache);
114
115 cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
116
117 /* The third argument is a pointer to an instance of `ucontext_t',
118 which has a member `uc_mcontext' that contains the saved
119 registers. */
120 regnum =
121 (cache->copied_regs_mask & 0x04) ? SPARC_I2_REGNUM : SPARC_O2_REGNUM;
122 mcontext_addr = get_frame_register_unsigned (this_frame, regnum) + 40;
123
124 cache->saved_regs[SPARC32_PSR_REGNUM].set_addr (mcontext_addr + 0 * 4);
125 cache->saved_regs[SPARC32_PC_REGNUM].set_addr (mcontext_addr + 1 * 4);
126 cache->saved_regs[SPARC32_NPC_REGNUM].set_addr (mcontext_addr + 2 * 4);
127 cache->saved_regs[SPARC32_Y_REGNUM].set_addr (mcontext_addr + 3 * 4);
128
129 /* Since %g0 is always zero, keep the identity encoding. */
130 for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 4 * 4;
131 regnum <= SPARC_O7_REGNUM; regnum++, addr += 4)
132 cache->saved_regs[regnum].set_addr (addr);
133
134 if (get_frame_memory_unsigned (this_frame, mcontext_addr + 19 * 4, 4))
135 {
136 /* The register windows haven't been flushed. */
137 for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++)
138 cache->saved_regs[regnum].set_unknown ();
139 }
140 else
141 {
142 addr = cache->saved_regs[SPARC_SP_REGNUM].addr ();
143 addr = get_frame_memory_unsigned (this_frame, addr, 4);
144 for (regnum = SPARC_L0_REGNUM;
145 regnum <= SPARC_I7_REGNUM; regnum++, addr += 4)
146 cache->saved_regs[regnum].set_addr (addr);
147 }
148
149 return cache;
150 }
151
152 static void
sparc32_sol2_sigtramp_frame_this_id(const frame_info_ptr & this_frame,void ** this_cache,struct frame_id * this_id)153 sparc32_sol2_sigtramp_frame_this_id (const frame_info_ptr &this_frame,
154 void **this_cache,
155 struct frame_id *this_id)
156 {
157 struct sparc_frame_cache *cache =
158 sparc32_sol2_sigtramp_frame_cache (this_frame, this_cache);
159
160 (*this_id) = frame_id_build (cache->base, cache->pc);
161 }
162
163 static struct value *
sparc32_sol2_sigtramp_frame_prev_register(const frame_info_ptr & this_frame,void ** this_cache,int regnum)164 sparc32_sol2_sigtramp_frame_prev_register (const frame_info_ptr &this_frame,
165 void **this_cache,
166 int regnum)
167 {
168 struct sparc_frame_cache *cache =
169 sparc32_sol2_sigtramp_frame_cache (this_frame, this_cache);
170
171 return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
172 }
173
174 static int
sparc32_sol2_sigtramp_frame_sniffer(const struct frame_unwind * self,const frame_info_ptr & this_frame,void ** this_cache)175 sparc32_sol2_sigtramp_frame_sniffer (const struct frame_unwind *self,
176 const frame_info_ptr &this_frame,
177 void **this_cache)
178 {
179 return sol2_sigtramp_p (this_frame);
180 }
181
182 static const struct frame_unwind sparc32_sol2_sigtramp_frame_unwind =
183 {
184 "sparc32 solaris sigtramp",
185 SIGTRAMP_FRAME,
186 default_frame_unwind_stop_reason,
187 sparc32_sol2_sigtramp_frame_this_id,
188 sparc32_sol2_sigtramp_frame_prev_register,
189 NULL,
190 sparc32_sol2_sigtramp_frame_sniffer
191 };
192
193
194
195 static void
sparc32_sol2_init_abi(struct gdbarch_info info,struct gdbarch * gdbarch)196 sparc32_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
197 {
198 sparc_gdbarch_tdep *tdep = gdbarch_tdep<sparc_gdbarch_tdep> (gdbarch);
199
200 tdep->gregset = &sparc32_sol2_gregset;
201 tdep->sizeof_gregset = 152;
202
203 tdep->fpregset = &sparc32_sol2_fpregset;
204 tdep->sizeof_fpregset = 400;
205
206 sol2_init_abi (info, gdbarch);
207
208 /* Solaris has SVR4-style shared libraries... */
209 set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
210 set_solib_svr4_fetch_link_map_offsets
211 (gdbarch, svr4_ilp32_fetch_link_map_offsets);
212
213 /* ...which means that we need some special handling when doing
214 prologue analysis. */
215 tdep->plt_entry_size = 12;
216
217 /* Solaris has kernel-assisted single-stepping support. */
218 set_gdbarch_software_single_step (gdbarch, NULL);
219
220 frame_unwind_append_unwinder (gdbarch, &sparc32_sol2_sigtramp_frame_unwind);
221 }
222
223 void _initialize_sparc_sol2_tdep ();
224 void
_initialize_sparc_sol2_tdep()225 _initialize_sparc_sol2_tdep ()
226 {
227 gdbarch_register_osabi (bfd_arch_sparc, 0,
228 GDB_OSABI_SOLARIS, sparc32_sol2_init_abi);
229 }
230