gdb/sparc64-sol2-tdep.c

   1 /* Target-dependent code for Solaris UltraSPARC.
   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 "gdbarch.h"
  23 #include "symtab.h"
  24 #include "objfiles.h"
  25 #include "osabi.h"
  26 #include "trad-frame.h"
  27 #include "regset.h"
  28
  29 #include "sol2-tdep.h"
  30 #include "sparc64-tdep.h"
  31 #include "solib-svr4.h"
  32
  33 /* From <sys/regset.h>.  */
  34 const struct sparc_gregmap sparc64_sol2_gregmap =
  35 {
  36   32 * 8,                       /* "tstate" */
  37   33 * 8,                       /* %pc */
  38   34 * 8,                       /* %npc */
  39   35 * 8,                       /* %y */
  40   -1,                           /* %wim */
  41   -1,                           /* %tbr */
  42   1 * 8,                        /* %g1 */
  43   16 * 8,                       /* %l0 */
  44   8                             /* sizeof (%y) */
  45 };
  46
  47 const struct sparc_fpregmap sparc64_sol2_fpregmap =
  48 {
  49   0 * 8,                        /* %f0 */
  50   33 * 8,                       /* %fsr */
  51 };
  52
  53 static void
  54 sparc64_sol2_supply_core_gregset (const struct regset *regset,
  55                                   struct regcache *regcache,
  56                                   int regnum, const void *gregs, size_t len)
  57 {
  58   sparc64_supply_gregset (&sparc64_sol2_gregmap, regcache, regnum, gregs);
  59 }
  60
  61 static void
  62 sparc64_sol2_collect_core_gregset (const struct regset *regset,
  63                                    const struct regcache *regcache,
  64                                    int regnum, void *gregs, size_t len)
  65 {
  66   sparc64_collect_gregset (&sparc64_sol2_gregmap, regcache, regnum, gregs);
  67 }
  68
  69 static void
  70 sparc64_sol2_supply_core_fpregset (const struct regset *regset,
  71                                    struct regcache *regcache,
  72                                    int regnum, const void *fpregs, size_t len)
  73 {
  74   sparc64_supply_fpregset (&sparc64_sol2_fpregmap, regcache, regnum, fpregs);
  75 }
  76
  77 static void
  78 sparc64_sol2_collect_core_fpregset (const struct regset *regset,
  79                                     const struct regcache *regcache,
  80                                     int regnum, void *fpregs, size_t len)
  81 {
  82   sparc64_collect_fpregset (&sparc64_sol2_fpregmap, regcache, regnum, fpregs);
  83 }
  84
  85 static const struct regset sparc64_sol2_gregset =
  86   {
  87     NULL,
  88     sparc64_sol2_supply_core_gregset,
  89     sparc64_sol2_collect_core_gregset
  90   };
  91
  92 static const struct regset sparc64_sol2_fpregset =
  93   {
  94     NULL,
  95     sparc64_sol2_supply_core_fpregset,
  96     sparc64_sol2_collect_core_fpregset
  97   };
  98 \f
  99
 100 static struct sparc_frame_cache *
 101 sparc64_sol2_sigtramp_frame_cache (const frame_info_ptr &this_frame,
 102                                    void **this_cache)
 103 {
 104   struct sparc_frame_cache *cache;
 105   CORE_ADDR mcontext_addr, addr;
 106   int regnum;
 107
 108   if (*this_cache)
 109     return (struct sparc_frame_cache *) *this_cache;
 110
 111   cache = sparc_frame_cache (this_frame, this_cache);
 112   gdb_assert (cache == *this_cache);
 113
 114   cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
 115
 116   /* The third argument is a pointer to an instance of `ucontext_t',
 117      which has a member `uc_mcontext' that contains the saved
 118      registers.  */
 119   regnum =
 120     (cache->copied_regs_mask & 0x04) ? SPARC_I2_REGNUM : SPARC_O2_REGNUM;
 121   mcontext_addr = get_frame_register_unsigned (this_frame, regnum) + 64;
 122
 123   cache->saved_regs[SPARC64_CCR_REGNUM].set_addr (mcontext_addr + 0 * 8);
 124   cache->saved_regs[SPARC64_PC_REGNUM].set_addr (mcontext_addr + 1 * 8);
 125   cache->saved_regs[SPARC64_NPC_REGNUM].set_addr (mcontext_addr + 2 * 8);
 126   cache->saved_regs[SPARC64_Y_REGNUM].set_addr (mcontext_addr + 3 * 8);
 127   cache->saved_regs[SPARC64_ASI_REGNUM].set_addr (mcontext_addr + 19 * 8);
 128   cache->saved_regs[SPARC64_FPRS_REGNUM].set_addr (mcontext_addr + 20 * 8);
 129
 130   /* Since %g0 is always zero, keep the identity encoding.  */
 131   for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 4 * 8;
 132        regnum <= SPARC_O7_REGNUM; regnum++, addr += 8)
 133     cache->saved_regs[regnum].set_addr (addr);
 134
 135   if (get_frame_memory_unsigned (this_frame, mcontext_addr + 21 * 8, 8))
 136     {
 137       /* The register windows haven't been flushed.  */
 138       for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++)
 139         cache->saved_regs[regnum].set_unknown ();
 140     }
 141   else
 142     {
 143       CORE_ADDR sp;
 144
 145       addr = cache->saved_regs[SPARC_SP_REGNUM].addr ();
 146       sp = get_frame_memory_unsigned (this_frame, addr, 8);
 147       for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS;
 148            regnum <= SPARC_I7_REGNUM; regnum++, addr += 8)
 149         cache->saved_regs[regnum].set_addr (addr);
 150     }
 151
 152   return cache;
 153 }
 154
 155 static void
 156 sparc64_sol2_sigtramp_frame_this_id (const frame_info_ptr &this_frame,
 157                                      void **this_cache,
 158                                      struct frame_id *this_id)
 159 {
 160   struct sparc_frame_cache *cache =
 161     sparc64_sol2_sigtramp_frame_cache (this_frame, this_cache);
 162
 163   (*this_id) = frame_id_build (cache->base, cache->pc);
 164 }
 165
 166 static struct value *
 167 sparc64_sol2_sigtramp_frame_prev_register (const frame_info_ptr &this_frame,
 168                                            void **this_cache,
 169                                            int regnum)
 170 {
 171   struct sparc_frame_cache *cache =
 172     sparc64_sol2_sigtramp_frame_cache (this_frame, this_cache);
 173
 174   return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
 175 }
 176
 177 static int
 178 sparc64_sol2_sigtramp_frame_sniffer (const struct frame_unwind *self,
 179                                      const frame_info_ptr &this_frame,
 180                                      void **this_cache)
 181 {
 182   return sol2_sigtramp_p (this_frame);
 183 }
 184
 185 static const struct frame_unwind sparc64_sol2_sigtramp_frame_unwind =
 186 {
 187   "sparc64 solaris sigtramp",
 188   SIGTRAMP_FRAME,
 189   default_frame_unwind_stop_reason,
 190   sparc64_sol2_sigtramp_frame_this_id,
 191   sparc64_sol2_sigtramp_frame_prev_register,
 192   NULL,
 193   sparc64_sol2_sigtramp_frame_sniffer
 194 };
 195
 196 \f
 197
 198 static void
 199 sparc64_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 200 {
 201   sparc_gdbarch_tdep *tdep = gdbarch_tdep<sparc_gdbarch_tdep> (gdbarch);
 202
 203   tdep->gregset = &sparc64_sol2_gregset;
 204   tdep->sizeof_gregset = 304;
 205
 206   tdep->fpregset = &sparc64_sol2_fpregset;
 207   tdep->sizeof_fpregset = 544;
 208
 209   frame_unwind_append_unwinder (gdbarch, &sparc64_sol2_sigtramp_frame_unwind);
 210
 211   sparc64_init_abi (info, gdbarch);
 212
 213   sol2_init_abi (info, gdbarch);
 214
 215   /* Solaris has SVR4-style shared libraries...  */
 216   set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
 217   set_solib_svr4_fetch_link_map_offsets
 218     (gdbarch, svr4_lp64_fetch_link_map_offsets);
 219
 220   /* ...which means that we need some special handling when doing
 221      prologue analysis.  */
 222   tdep->plt_entry_size = 16;
 223
 224   /* Solaris has kernel-assisted single-stepping support.  */
 225   set_gdbarch_software_single_step (gdbarch, NULL);
 226 }
 227
 228 void _initialize_sparc64_sol2_tdep ();
 229 void
 230 _initialize_sparc64_sol2_tdep ()
 231 {
 232   gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
 233                           GDB_OSABI_SOLARIS, sparc64_sol2_init_abi);
 234 }