gdb/amd64-sol2-tdep.c

   1 /* Target-dependent code for AMD64 Solaris.
   2
   3    Copyright (C) 2001-2016 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 #include "frame.h"
  24 #include "gdbcore.h"
  25 #include "regcache.h"
  26 #include "osabi.h"
  27 #include "symtab.h"
  28
  29 #include "sol2-tdep.h"
  30 #include "amd64-tdep.h"
  31 #include "solib-svr4.h"
  32
  33 /* Mapping between the general-purpose registers in gregset_t format
  34    and GDB's register cache layout.  */
  35
  36 /* From <sys/regset.h>.  */
  37 static int amd64_sol2_gregset_reg_offset[] = {
  38   14 * 8,                       /* %rax */
  39   11 * 8,                       /* %rbx */
  40   13 * 8,                       /* %rcx */
  41   12 * 8,                       /* %rdx */
  42   9 * 8,                        /* %rsi */
  43   8 * 8,                        /* %rdi */
  44   10 * 8,                       /* %rbp */
  45   20 * 8,                       /* %rsp */
  46   7 * 8,                        /* %r8 ...  */
  47   6 * 8,
  48   5 * 8,
  49   4 * 8,
  50   3 * 8,
  51   2 * 8,
  52   1 * 8,
  53   0 * 8,                        /* ... %r15 */
  54   17 * 8,                       /* %rip */
  55   19 * 8,                       /* %eflags */
  56   18 * 8,                       /* %cs */
  57   21 * 8,                       /* %ss */
  58   25 * 8,                       /* %ds */
  59   24 * 8,                       /* %es */
  60   22 * 8,                       /* %fs */
  61   23 * 8                        /* %gs */
  62 };
  63 \f
  64
  65 /* Return whether THIS_FRAME corresponds to a Solaris sigtramp
  66    routine.  */
  67
  68 static int
  69 amd64_sol2_sigtramp_p (struct frame_info *this_frame)
  70 {
  71   CORE_ADDR pc = get_frame_pc (this_frame);
  72   const char *name;
  73
  74   find_pc_partial_function (pc, &name, NULL, NULL);
  75   return (name && (strcmp ("sigacthandler", name) == 0
  76                    || strcmp (name, "ucbsigvechandler") == 0));
  77 }
  78
  79 /* Solaris doesn't have a 'struct sigcontext', but it does have a
  80    'mcontext_t' that contains the saved set of machine registers.  */
  81
  82 static CORE_ADDR
  83 amd64_sol2_mcontext_addr (struct frame_info *this_frame)
  84 {
  85   CORE_ADDR sp, ucontext_addr;
  86
  87   sp = get_frame_register_unsigned (this_frame, AMD64_RSP_REGNUM);
  88   ucontext_addr = get_frame_memory_unsigned (this_frame, sp + 8, 8);
  89
  90   return ucontext_addr + 72;
  91 }
  92
  93 static void
  94 amd64_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  95 {
  96   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  97
  98   tdep->gregset_reg_offset = amd64_sol2_gregset_reg_offset;
  99   tdep->gregset_num_regs = ARRAY_SIZE (amd64_sol2_gregset_reg_offset);
 100   tdep->sizeof_gregset = 28 * 8;
 101
 102   amd64_init_abi (info, gdbarch);
 103
 104   tdep->sigtramp_p = amd64_sol2_sigtramp_p;
 105   tdep->sigcontext_addr = amd64_sol2_mcontext_addr;
 106   tdep->sc_reg_offset = tdep->gregset_reg_offset;
 107   tdep->sc_num_regs = tdep->gregset_num_regs;
 108
 109   /* Solaris uses SVR4-style shared libraries.  */
 110   set_gdbarch_skip_solib_resolver (gdbarch, sol2_skip_solib_resolver);
 111   set_solib_svr4_fetch_link_map_offsets
 112     (gdbarch, svr4_lp64_fetch_link_map_offsets);
 113
 114   /* How to print LWP PTIDs from core files.  */
 115   set_gdbarch_core_pid_to_str (gdbarch, sol2_core_pid_to_str);
 116 }
 117 \f
 118
 119 /* Provide a prototype to silence -Wmissing-prototypes.  */
 120 extern void _initialize_amd64_sol2_tdep (void);
 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 }