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/tmp/gdb-7.10/gdb/i386-sol2-tdep.c
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1 /* Target-dependent code for Solaris x86.
2 
3  Copyright (C) 2002-2015 Free Software Foundation, Inc.
4 
5  This file is part of GDB.
6 
7  This program is free software; you can redistribute it and/or modify
8  it under the terms of the GNU General Public License as published by
9  the Free Software Foundation; either version 3 of the License, or
10  (at your option) any later version.
11 
12  This program is distributed in the hope that it will be useful,
13  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  GNU General Public License for more details.
16 
17  You should have received a copy of the GNU General Public License
18  along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 
20 #include "defs.h"
21 #include "value.h"
22 #include "osabi.h"
23 
24 #include "sol2-tdep.h"
25 #include "i386-tdep.h"
26 #include "solib-svr4.h"
27 
28 /* From <ia32/sys/reg.h>. */
30 {
31  11 * 4, /* %eax */
32  10 * 4, /* %ecx */
33  9 * 4, /* %edx */
34  8 * 4, /* %ebx */
35  17 * 4, /* %esp */
36  6 * 4, /* %ebp */
37  5 * 4, /* %esi */
38  4 * 4, /* %edi */
39  14 * 4, /* %eip */
40  16 * 4, /* %eflags */
41  15 * 4, /* %cs */
42  18 * 4, /* %ss */
43  3 * 4, /* %ds */
44  2 * 4, /* %es */
45  1 * 4, /* %fs */
46  0 * 4 /* %gs */
47 };
48 
49 /* Return whether THIS_FRAME corresponds to a Solaris sigtramp
50  routine. */
51 
52 static int
53 i386_sol2_sigtramp_p (struct frame_info *this_frame)
54 {
55  CORE_ADDR pc = get_frame_pc (this_frame);
56  const char *name;
57 
58  find_pc_partial_function (pc, &name, NULL, NULL);
59  return (name && (strcmp ("sigacthandler", name) == 0
60  || strcmp (name, "ucbsigvechandler") == 0));
61 }
62 
63 /* Solaris doesn't have a `struct sigcontext', but it does have a
64  `mcontext_t' that contains the saved set of machine registers. */
65 
66 static CORE_ADDR
67 i386_sol2_mcontext_addr (struct frame_info *this_frame)
68 {
69  CORE_ADDR sp, ucontext_addr;
70 
72  ucontext_addr = get_frame_memory_unsigned (this_frame, sp + 8, 4);
73 
74  return ucontext_addr + 36;
75 }
76 
77 /* SunPRO encodes the static variables. This is not related to C++
78  mangling, it is done for C too. */
79 
80 static const char *
82 {
83  if (name[0] == '.')
84  {
85  const char *p;
86 
87  /* For file-local statics there will be a period, a bunch of
88  junk (the contents of which match a string given in the
89  N_OPT), a period and the name. For function-local statics
90  there will be a bunch of junk (which seems to change the
91  second character from 'A' to 'B'), a period, the name of the
92  function, and the name. So just skip everything before the
93  last period. */
94  p = strrchr (name, '.');
95  if (p != NULL)
96  name = p + 1;
97  }
98  return name;
99 }
100 
101 /* Solaris 2. */
102 
103 static void
105 {
106  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
107 
108  /* Solaris is SVR4-based. */
109  i386_svr4_init_abi (info, gdbarch);
110 
111  /* The SunPRO compiler puts out 0 instead of the address in N_SO symbols,
112  and for SunPRO 3.0, N_FUN symbols too. */
114 
115  /* Handle SunPRO encoding of static symbols. */
117 
118  /* Solaris reserves space for its FPU emulator in `fpregset_t'.
119  There is also some space reserved for the registers of a Weitek
120  math coprocessor. */
122  tdep->gregset_num_regs = ARRAY_SIZE (i386_sol2_gregset_reg_offset);
123  tdep->sizeof_gregset = 19 * 4;
124  tdep->sizeof_fpregset = 380;
125 
126  /* Signal trampolines are slightly different from SVR4. */
129  tdep->sc_reg_offset = tdep->gregset_reg_offset;
130  tdep->sc_num_regs = tdep->gregset_num_regs;
131 
132  /* Solaris has SVR4-style shared libraries. */
136 
137  /* How to print LWP PTIDs from core files. */
139 }
140 
141 
142 static enum gdb_osabi
144 {
145  /* If we have a section named .SUNW_version, then it is almost
146  certainly Solaris 2. */
147  if (bfd_get_section_by_name (abfd, ".SUNW_version"))
148  return GDB_OSABI_SOLARIS;
149 
150  return GDB_OSABI_UNKNOWN;
151 }
152 
153 /* Provide a prototype to silence -Wmissing-prototypes. */
154 void _initialize_i386_sol2_tdep (void);
155 
156 void
158 {
159  /* Register an ELF OS ABI sniffer for Solaris 2 binaries. */
160  gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
162 
163  gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_SOLARIS,
165 }
CORE_ADDR sol2_skip_solib_resolver(struct gdbarch *gdbarch, CORE_ADDR pc)
Definition: sol2-tdep.c:29
void set_gdbarch_core_pid_to_str(struct gdbarch *gdbarch, gdbarch_core_pid_to_str_ftype core_pid_to_str)
Definition: gdbarch.c:3542
CORE_ADDR get_frame_pc(struct frame_info *frame)
Definition: frame.c:2217
bfd_vma CORE_ADDR
Definition: common-types.h:41
int sc_num_regs
Definition: i386-tdep.h:216
void _initialize_i386_sol2_tdep(void)
struct m32c_reg * pc
Definition: m32c-tdep.c:111
void gdbarch_register_osabi_sniffer(enum bfd_architecture arch, enum bfd_flavour flavour, enum gdb_osabi(*sniffer_fn)(bfd *))
Definition: osabi.c:225
CORE_ADDR(* sigcontext_addr)(struct frame_info *)
Definition: alpha-tdep.h:82
struct link_map_offsets * svr4_ilp32_fetch_link_map_offsets(void)
Definition: solib-svr4.c:3149
size_t sizeof_fpregset
Definition: i386-tdep.h:64
ULONGEST get_frame_memory_unsigned(struct frame_info *this_frame, CORE_ADDR addr, int len)
Definition: frame.c:2515
struct gdbarch_tdep * gdbarch_tdep(struct gdbarch *gdbarch)
Definition: gdbarch.c:1402
const char *const name
Definition: aarch64-tdep.c:68
static enum gdb_osabi i386_sol2_osabi_sniffer(bfd *abfd)
void i386_svr4_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
Definition: i386-tdep.c:4362
void set_solib_svr4_fetch_link_map_offsets(struct gdbarch *gdbarch, struct link_map_offsets *(*flmo)(void))
Definition: solib-svr4.c:3108
static int i386_sol2_gregset_reg_offset[]
int find_pc_partial_function(CORE_ADDR pc, const char **name, CORE_ADDR *address, CORE_ADDR *endaddr)
Definition: blockframe.c:321
static CORE_ADDR i386_sol2_mcontext_addr(struct frame_info *this_frame)
static void i386_sol2_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
ULONGEST get_frame_register_unsigned(struct frame_info *frame, int regnum)
Definition: frame.c:1194
void set_gdbarch_sofun_address_maybe_missing(struct gdbarch *gdbarch, int sofun_address_maybe_missing)
Definition: gdbarch.c:3857
int * gregset_reg_offset
Definition: i386-tdep.h:59
int(* sigtramp_p)(struct frame_info *)
Definition: i386-tdep.h:209
char * sol2_core_pid_to_str(struct gdbarch *gdbarch, ptid_t ptid)
Definition: sol2-tdep.c:44
static int i386_sol2_sigtramp_p(struct frame_info *this_frame)
size_t sizeof_gregset
Definition: i386-tdep.h:61
void set_gdbarch_static_transform_name(struct gdbarch *gdbarch, gdbarch_static_transform_name_ftype static_transform_name)
Definition: gdbarch.c:3840
struct m32c_reg * sp
Definition: m32c-tdep.c:114
static const char * i386_sol2_static_transform_name(const char *name)
int * sc_reg_offset
Definition: i386-tdep.h:215
void set_gdbarch_skip_solib_resolver(struct gdbarch *gdbarch, gdbarch_skip_solib_resolver_ftype skip_solib_resolver)
Definition: gdbarch.c:3101
int gregset_num_regs
Definition: i386-tdep.h:60
void gdbarch_register_osabi(enum bfd_architecture arch, unsigned long machine, enum gdb_osabi osabi, void(*init_osabi)(struct gdbarch_info, struct gdbarch *))
Definition: osabi.c:148
gdb_osabi
Definition: defs.h:540