gdb/amd64-sol2-tdep.c

   1 /* Target-dependent code for AMD64 Solaris.
   2
   3    Copyright (C) 2001, 2002, 2003, 2004, 2006 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 2 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, write to the Free Software
  21    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  22    Boston, MA 02110-1301, USA.  */
  23
  24 #include "defs.h"
  25 #include "frame.h"
  26 #include "gdbcore.h"
  27 #include "regcache.h"
  28 #include "osabi.h"
  29 #include "symtab.h"
  30
  31 #include "gdb_string.h"
  32
  33 #include "sol2-tdep.h"
  34 #include "amd64-tdep.h"
  35 #include "solib-svr4.h"
  36
  37 /* Mapping between the general-purpose registers in gregset_t format
  38    and GDB's register cache layout.  */
  39
  40 /* From <sys/regset.h>.  */
  41 static int amd64_sol2_gregset_reg_offset[] = {
  42   14 * 8,                       /* %rax */
  43   11 * 8,                       /* %rbx */
  44   13 * 8,                       /* %rcx */
  45   12 * 8,                       /* %rdx */
  46   9 * 8,                        /* %rsi */
  47   8 * 8,                        /* %rdi */
  48   10 * 8,                       /* %rbp */
  49   20 * 8,                       /* %rsp */
  50   7 * 8,                        /* %r8 ... */
  51   6 * 8,
  52   5 * 8,
  53   4 * 8,
  54   3 * 8,
  55   2 * 8,
  56   1 * 8,
  57   0 * 8,                        /* ... %r15 */
  58   17 * 8,                       /* %rip */
  59   16 * 8,                       /* %eflags */
  60   18 * 8,                       /* %cs */
  61   21 * 8,                       /* %ss */
  62   25 * 8,                       /* %ds */
  63   24 * 8,                       /* %es */
  64   22 * 8,                       /* %fs */
  65   23 * 8                        /* %gs */
  66 };
  67 \f
  68
  69 /* Return whether the frame preceding NEXT_FRAME corresponds to a
  70    Solaris sigtramp routine.  */
  71
  72 static int
  73 amd64_sol2_sigtramp_p (struct frame_info *next_frame)
  74 {
  75   CORE_ADDR pc = frame_pc_unwind (next_frame);
  76   char *name;
  77
  78   find_pc_partial_function (pc, &name, NULL, NULL);
  79   return (name && (strcmp ("sigacthandler", name) == 0
  80                    || strcmp (name, "ucbsigvechandler") == 0));
  81 }
  82
  83 /* Solaris doesn't have a 'struct sigcontext', but it does have a
  84    'mcontext_t' that contains the saved set of machine registers.  */
  85
  86 static CORE_ADDR
  87 amd64_sol2_mcontext_addr (struct frame_info *next_frame)
  88 {
  89   CORE_ADDR sp, ucontext_addr;
  90
  91   sp = frame_unwind_register_unsigned (next_frame, AMD64_RSP_REGNUM);
  92   ucontext_addr = get_frame_memory_unsigned (next_frame, sp + 8, 8);
  93
  94   return ucontext_addr + 72;
  95 }
  96
  97 static void
  98 amd64_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  99 {
 100   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 101
 102   tdep->gregset_reg_offset = amd64_sol2_gregset_reg_offset;
 103   tdep->gregset_num_regs = ARRAY_SIZE (amd64_sol2_gregset_reg_offset);
 104   tdep->sizeof_gregset = 28 * 8;
 105
 106   amd64_init_abi (info, gdbarch);
 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 \f
 119
 120 /* Provide a prototype to silence -Wmissing-prototypes.  */
 121 extern void _initialize_amd64_sol2_tdep (void);
 122
 123 void
 124 _initialize_amd64_sol2_tdep (void)
 125 {
 126   gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
 127                           GDB_OSABI_SOLARIS, amd64_sol2_init_abi);
 128 }