1 /* Target-dependent code for Solaris SPARC.
3 Copyright (C) 2003-2014 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/>. */
22 #include "frame-unwind.h"
30 #include "trad-frame.h"
32 #include "sol2-tdep.h"
33 #include "sparc-tdep.h"
34 #include "solib-svr4.h"
36 /* From <sys/regset.h>. */
37 const struct sparc_gregmap sparc32_sol2_gregmap =
49 const struct sparc_fpregmap sparc32_sol2_fpregmap =
56 sparc32_sol2_supply_core_gregset (const struct regset *regset,
57 struct regcache *regcache,
58 int regnum, const void *gregs, size_t len)
60 sparc32_supply_gregset (&sparc32_sol2_gregmap, regcache, regnum, gregs);
64 sparc32_sol2_collect_core_gregset (const struct regset *regset,
65 const struct regcache *regcache,
66 int regnum, void *gregs, size_t len)
68 sparc32_collect_gregset (&sparc32_sol2_gregmap, regcache, regnum, gregs);
72 sparc32_sol2_supply_core_fpregset (const struct regset *regset,
73 struct regcache *regcache,
74 int regnum, const void *fpregs, size_t len)
76 sparc32_supply_fpregset (&sparc32_sol2_fpregmap, regcache, regnum, fpregs);
80 sparc32_sol2_collect_core_fpregset (const struct regset *regset,
81 const struct regcache *regcache,
82 int regnum, void *fpregs, size_t len)
84 sparc32_collect_fpregset (&sparc32_sol2_fpregmap, regcache, regnum, fpregs);
87 static const struct regset sparc32_sol2_gregset =
90 sparc32_sol2_supply_core_gregset,
91 sparc32_sol2_collect_core_gregset
94 static const struct regset sparc32_sol2_fpregset =
97 sparc32_sol2_supply_core_fpregset,
98 sparc32_sol2_collect_core_fpregset
102 /* The Solaris signal trampolines reside in libc. For normal signals,
103 the function `sigacthandler' is used. This signal trampoline will
104 call the signal handler using the System V calling convention,
105 where the third argument is a pointer to an instance of
106 `ucontext_t', which has a member `uc_mcontext' that contains the
107 saved registers. Incidentally, the kernel passes the `ucontext_t'
108 pointer as the third argument of the signal trampoline too, and
109 `sigacthandler' simply passes it on. However, if you link your
110 program with "-L/usr/ucblib -R/usr/ucblib -lucb", the function
111 `ucbsigvechandler' will be used, which invokes the using the BSD
112 convention, where the third argument is a pointer to an instance of
113 `struct sigcontext'. It is the `ucbsigvechandler' function that
114 converts the `ucontext_t' to a `sigcontext', and back. Unless the
115 signal handler modifies the `struct sigcontext' we can safely
119 sparc_sol2_pc_in_sigtramp (CORE_ADDR pc, const char *name)
121 return (name && (strcmp (name, "sigacthandler") == 0
122 || strcmp (name, "ucbsigvechandler") == 0
123 || strcmp (name, "__sighndlr") == 0));
126 static struct sparc_frame_cache *
127 sparc32_sol2_sigtramp_frame_cache (struct frame_info *this_frame,
130 struct sparc_frame_cache *cache;
131 CORE_ADDR mcontext_addr, addr;
137 cache = sparc_frame_cache (this_frame, this_cache);
138 gdb_assert (cache == *this_cache);
140 cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
142 /* The third argument is a pointer to an instance of `ucontext_t',
143 which has a member `uc_mcontext' that contains the saved
146 (cache->copied_regs_mask & 0x04) ? SPARC_I2_REGNUM : SPARC_O2_REGNUM;
147 mcontext_addr = get_frame_register_unsigned (this_frame, regnum) + 40;
149 cache->saved_regs[SPARC32_PSR_REGNUM].addr = mcontext_addr + 0 * 4;
150 cache->saved_regs[SPARC32_PC_REGNUM].addr = mcontext_addr + 1 * 4;
151 cache->saved_regs[SPARC32_NPC_REGNUM].addr = mcontext_addr + 2 * 4;
152 cache->saved_regs[SPARC32_Y_REGNUM].addr = mcontext_addr + 3 * 4;
154 /* Since %g0 is always zero, keep the identity encoding. */
155 for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 4 * 4;
156 regnum <= SPARC_O7_REGNUM; regnum++, addr += 4)
157 cache->saved_regs[regnum].addr = addr;
159 if (get_frame_memory_unsigned (this_frame, mcontext_addr + 19 * 4, 4))
161 /* The register windows haven't been flushed. */
162 for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++)
163 trad_frame_set_unknown (cache->saved_regs, regnum);
167 addr = cache->saved_regs[SPARC_SP_REGNUM].addr;
168 addr = get_frame_memory_unsigned (this_frame, addr, 4);
169 for (regnum = SPARC_L0_REGNUM;
170 regnum <= SPARC_I7_REGNUM; regnum++, addr += 4)
171 cache->saved_regs[regnum].addr = addr;
178 sparc32_sol2_sigtramp_frame_this_id (struct frame_info *this_frame,
180 struct frame_id *this_id)
182 struct sparc_frame_cache *cache =
183 sparc32_sol2_sigtramp_frame_cache (this_frame, this_cache);
185 (*this_id) = frame_id_build (cache->base, cache->pc);
188 static struct value *
189 sparc32_sol2_sigtramp_frame_prev_register (struct frame_info *this_frame,
193 struct sparc_frame_cache *cache =
194 sparc32_sol2_sigtramp_frame_cache (this_frame, this_cache);
196 return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
200 sparc32_sol2_sigtramp_frame_sniffer (const struct frame_unwind *self,
201 struct frame_info *this_frame,
204 CORE_ADDR pc = get_frame_pc (this_frame);
207 find_pc_partial_function (pc, &name, NULL, NULL);
208 if (sparc_sol2_pc_in_sigtramp (pc, name))
214 static const struct frame_unwind sparc32_sol2_sigtramp_frame_unwind =
217 default_frame_unwind_stop_reason,
218 sparc32_sol2_sigtramp_frame_this_id,
219 sparc32_sol2_sigtramp_frame_prev_register,
221 sparc32_sol2_sigtramp_frame_sniffer
224 /* Unglobalize NAME. */
227 sparc_sol2_static_transform_name (const char *name)
229 /* The Sun compilers (Sun ONE Studio, Forte Developer, Sun WorkShop,
230 SunPRO) convert file static variables into global values, a
231 process known as globalization. In order to do this, the
232 compiler will create a unique prefix and prepend it to each file
233 static variable. For static variables within a function, this
234 globalization prefix is followed by the function name (nested
235 static variables within a function are supposed to generate a
236 warning message, and are left alone). The procedure is
237 documented in the Stabs Interface Manual, which is distrubuted
238 with the compilers, although version 4.0 of the manual seems to
239 be incorrect in some places, at least for SPARC. The
240 globalization prefix is encoded into an N_OPT stab, with the form
241 "G=<prefix>". The globalization prefix always seems to start
242 with a dollar sign '$'; a dot '.' is used as a seperator. So we
243 simply strip everything up until the last dot. */
247 char *p = strrchr (name, '.');
257 sparc32_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
259 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
261 tdep->gregset = &sparc32_sol2_gregset;
262 tdep->sizeof_gregset = 152;
264 tdep->fpregset = &sparc32_sol2_fpregset;
265 tdep->sizeof_fpregset = 400;
267 /* The Sun compilers (Sun ONE Studio, Forte Developer, Sun WorkShop, SunPRO)
268 compiler puts out 0 instead of the address in N_SO stabs. Starting with
269 SunPRO 3.0, the compiler does this for N_FUN stabs too. */
270 set_gdbarch_sofun_address_maybe_missing (gdbarch, 1);
272 /* The Sun compilers also do "globalization"; see the comment in
273 sparc_sol2_static_transform_name for more information. */
274 set_gdbarch_static_transform_name
275 (gdbarch, sparc_sol2_static_transform_name);
277 /* Solaris has SVR4-style shared libraries... */
278 set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
279 set_gdbarch_skip_solib_resolver (gdbarch, sol2_skip_solib_resolver);
280 set_solib_svr4_fetch_link_map_offsets
281 (gdbarch, svr4_ilp32_fetch_link_map_offsets);
283 /* ...which means that we need some special handling when doing
284 prologue analysis. */
285 tdep->plt_entry_size = 12;
287 /* Solaris has kernel-assisted single-stepping support. */
288 set_gdbarch_software_single_step (gdbarch, NULL);
290 frame_unwind_append_unwinder (gdbarch, &sparc32_sol2_sigtramp_frame_unwind);
292 /* How to print LWP PTIDs from core files. */
293 set_gdbarch_core_pid_to_str (gdbarch, sol2_core_pid_to_str);
297 /* Provide a prototype to silence -Wmissing-prototypes. */
298 void _initialize_sparc_sol2_tdep (void);
301 _initialize_sparc_sol2_tdep (void)
303 gdbarch_register_osabi (bfd_arch_sparc, 0,
304 GDB_OSABI_SOLARIS, sparc32_sol2_init_abi);