amd64-sol2-tdep.c revision 1.7 
1/* Target-dependent code for AMD64 Solaris.
2
3   Copyright (C) 2001-2017 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>.  */
37static 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
64
65/* Return whether THIS_FRAME corresponds to a Solaris sigtramp
66   routine.  */
67
68static int
69amd64_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
82static CORE_ADDR
83amd64_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
93static void
94amd64_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
118
119/* Provide a prototype to silence -Wmissing-prototypes.  */
120extern void _initialize_amd64_sol2_tdep (void);
121
122void
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}
128