gdb/amd64-sol2-tdep.c

   1 /* Target-dependent code for AMD64 Solaris.
   2
   3    Copyright (C) 2001, 2002, 2003, 2004, 2006, 2007
   4    Free Software Foundation, Inc.
   5
   6    Contributed by Joseph Myers, CodeSourcery, LLC.
   7
   8    This file is part of GDB.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  22
  23 #include "defs.h"
  24 #include "frame.h"
  25 #include "gdbcore.h"
  26 #include "regcache.h"
  27 #include "osabi.h"
  28 #include "symtab.h"
  29
  30 #include "gdb_string.h"
  31
  32 #include "sol2-tdep.h"
  33 #include "amd64-tdep.h"
  34 #include "solib-svr4.h"
  35
  36 /* Mapping between the general-purpose registers in gregset_t format
  37    and GDB's register cache layout.  */
  38
  39 /* From <sys/regset.h>.  */
  40 static int amd64_sol2_gregset_reg_offset[] = {
  41   14 * 8,                       /* %rax */
  42   11 * 8,                       /* %rbx */
  43   13 * 8,                       /* %rcx */
  44   12 * 8,                       /* %rdx */
  45   9 * 8,                        /* %rsi */
  46   8 * 8,                        /* %rdi */
  47   10 * 8,                       /* %rbp */
  48   20 * 8,                       /* %rsp */
  49   7 * 8,                        /* %r8 ... */
  50   6 * 8,
  51   5 * 8,
  52   4 * 8,
  53   3 * 8,
  54   2 * 8,
  55   1 * 8,
  56   0 * 8,                        /* ... %r15 */
  57   17 * 8,                       /* %rip */
  58   16 * 8,                       /* %eflags */
  59   18 * 8,                       /* %cs */
  60   21 * 8,                       /* %ss */
  61   25 * 8,                       /* %ds */
  62   24 * 8,                       /* %es */
  63   22 * 8,                       /* %fs */
  64   23 * 8                        /* %gs */
  65 };
  66 \f
  67
  68 /* Return whether the frame preceding NEXT_FRAME corresponds to a
  69    Solaris sigtramp routine.  */
  70
  71 static int
  72 amd64_sol2_sigtramp_p (struct frame_info *next_frame)
  73 {
  74   CORE_ADDR pc = frame_pc_unwind (next_frame);
  75   char *name;
  76
  77   find_pc_partial_function (pc, &name, NULL, NULL);
  78   return (name && (strcmp ("sigacthandler", name) == 0
  79                    || strcmp (name, "ucbsigvechandler") == 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 *next_frame)
  87 {
  88   CORE_ADDR sp, ucontext_addr;
  89
  90   sp = frame_unwind_register_unsigned (next_frame, AMD64_RSP_REGNUM);
  91   ucontext_addr = get_frame_memory_unsigned (next_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
 107   tdep->sigtramp_p = amd64_sol2_sigtramp_p;
 108   tdep->sigcontext_addr = amd64_sol2_mcontext_addr;
 109   tdep->sc_reg_offset = tdep->gregset_reg_offset;
 110   tdep->sc_num_regs = tdep->gregset_num_regs;
 111
 112   /* Solaris uses SVR4-style shared libraries.  */
 113   set_gdbarch_skip_solib_resolver (gdbarch, sol2_skip_solib_resolver);
 114   set_solib_svr4_fetch_link_map_offsets
 115     (gdbarch, svr4_lp64_fetch_link_map_offsets);
 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 }