gdb/amd64-sol2-tdep.c

   1 /* Target-dependent code for AMD64 Solaris.
   2
   3    Copyright (C) 2001-2019 Free Software Foundation, Inc.
   4
   5    Contributed by Joseph Myers, CodeSourcery, LLC.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #include "defs.h"
  23
  24 /* Local non-gdb includes.  */
  25 #include "amd64-tdep.h"
  26 #include "common/x86-xstate.h"
  27 #include "frame.h"
  28 #include "gdbcore.h"
  29 #include "osabi.h"
  30 #include "regcache.h"
  31 #include "sol2-tdep.h"
  32 #include "solib-svr4.h"
  33 #include "symtab.h"
  34
  35 /* Mapping between the general-purpose registers in gregset_t format
  36    and GDB's register cache layout.  */
  37
  38 /* From <sys/regset.h>.  */
  39 static int amd64_sol2_gregset_reg_offset[] = {
  40   14 * 8,                       /* %rax */
  41   11 * 8,                       /* %rbx */
  42   13 * 8,                       /* %rcx */
  43   12 * 8,                       /* %rdx */
  44   9 * 8,                        /* %rsi */
  45   8 * 8,                        /* %rdi */
  46   10 * 8,                       /* %rbp */
  47   20 * 8,                       /* %rsp */
  48   7 * 8,                        /* %r8 ...  */
  49   6 * 8,
  50   5 * 8,
  51   4 * 8,
  52   3 * 8,
  53   2 * 8,
  54   1 * 8,
  55   0 * 8,                        /* ... %r15 */
  56   17 * 8,                       /* %rip */
  57   19 * 8,                       /* %eflags */
  58   18 * 8,                       /* %cs */
  59   21 * 8,                       /* %ss */
  60   25 * 8,                       /* %ds */
  61   24 * 8,                       /* %es */
  62   22 * 8,                       /* %fs */
  63   23 * 8                        /* %gs */
  64 };
  65 \f
  66
  67 /* Return whether THIS_FRAME corresponds to a Solaris sigtramp
  68    routine.  */
  69
  70 static int
  71 amd64_sol2_sigtramp_p (struct frame_info *this_frame)
  72 {
  73   CORE_ADDR pc = get_frame_pc (this_frame);
  74   const char *name;
  75
  76   find_pc_partial_function (pc, &name, NULL, NULL);
  77   return (name && (strcmp ("sigacthandler", name) == 0
  78                    || strcmp (name, "ucbsigvechandler") == 0
  79                    || strcmp (name, "__sighndlr") == 0));
  80 }
  81
  82 /* Solaris doesn't have a 'struct sigcontext', but it does have a
  83    'mcontext_t' that contains the saved set of machine registers.  */
  84
  85 static CORE_ADDR
  86 amd64_sol2_mcontext_addr (struct frame_info *this_frame)
  87 {
  88   CORE_ADDR sp, ucontext_addr;
  89
  90   sp = get_frame_register_unsigned (this_frame, AMD64_RSP_REGNUM);
  91   ucontext_addr = get_frame_memory_unsigned (this_frame, sp + 8, 8);
  92
  93   return ucontext_addr + 72;
  94 }
  95
  96 static void
  97 amd64_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  98 {
  99   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 100
 101   tdep->gregset_reg_offset = amd64_sol2_gregset_reg_offset;
 102   tdep->gregset_num_regs = ARRAY_SIZE (amd64_sol2_gregset_reg_offset);
 103   tdep->sizeof_gregset = 28 * 8;
 104
 105   amd64_init_abi (info, gdbarch,
 106                   amd64_target_description (X86_XSTATE_SSE_MASK, true));
 107
 108   tdep->sigtramp_p = amd64_sol2_sigtramp_p;
 109   tdep->sigcontext_addr = amd64_sol2_mcontext_addr;
 110   tdep->sc_reg_offset = tdep->gregset_reg_offset;
 111   tdep->sc_num_regs = tdep->gregset_num_regs;
 112
 113   /* Solaris uses SVR4-style shared libraries.  */
 114   set_gdbarch_skip_solib_resolver (gdbarch, sol2_skip_solib_resolver);
 115   set_solib_svr4_fetch_link_map_offsets
 116     (gdbarch, svr4_lp64_fetch_link_map_offsets);
 117
 118   /* How to print LWP PTIDs from core files.  */
 119   set_gdbarch_core_pid_to_str (gdbarch, sol2_core_pid_to_str);
 120 }
 121
 122 void
 123 _initialize_amd64_sol2_tdep (void)
 124 {
 125   gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
 126                           GDB_OSABI_SOLARIS, amd64_sol2_init_abi);
 127 }