1 /* Target-dependent code for Solaris x86.
2
3 Copyright 2002, 2003, 2004 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 2 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, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22 #include "defs.h"
23 #include "value.h"
24 #include "osabi.h"
25
26 #include "gdb_string.h"
27
28 #include "i386-tdep.h"
29 #include "solib-svr4.h"
30
31 /* From <ia32/sys/reg.h>. */
32 static int i386_sol2_gregset_reg_offset[] =
33 {
34 11 * 4, /* %eax */
35 10 * 4, /* %ecx */
36 9 * 4, /* %edx */
37 8 * 4, /* %ebx */
38 17 * 4, /* %esp */
39 6 * 4, /* %ebp */
40 5 * 4, /* %esi */
41 4 * 4, /* %edi */
42 14 * 4, /* %eip */
43 16 * 4, /* %eflags */
44 15 * 4, /* %cs */
45 18 * 4, /* %ss */
46 3 * 4, /* %ds */
47 2 * 4, /* %es */
48 1 * 4, /* %fs */
49 0 * 4 /* %gs */
50 };
51
52 /* Return whether the frame preceding NEXT_FRAME corresponds to a
53 Solaris sigtramp routine. */
54
55 static int
i386_sol2_sigtramp_p(struct frame_info * next_frame)56 i386_sol2_sigtramp_p (struct frame_info *next_frame)
57 {
58 CORE_ADDR pc = frame_pc_unwind (next_frame);
59 char *name;
60
61 find_pc_partial_function (pc, &name, NULL, NULL);
62 return (name && (strcmp ("sigacthandler", name) == 0
63 || strcmp (name, "ucbsigvechandler") == 0));
64 }
65
66 /* Solaris doesn't have a `struct sigcontext', but it does have a
67 `mcontext_t' that contains the saved set of machine registers. */
68
69 static CORE_ADDR
i386_sol2_mcontext_addr(struct frame_info * next_frame)70 i386_sol2_mcontext_addr (struct frame_info *next_frame)
71 {
72 CORE_ADDR sp, ucontext_addr;
73
74 sp = frame_unwind_register_unsigned (next_frame, I386_ESP_REGNUM);
75 ucontext_addr = get_frame_memory_unsigned (next_frame, sp + 8, 4);
76
77 return ucontext_addr + 36;
78 }
79
80 /* Solaris 2. */
81
82 static void
i386_sol2_init_abi(struct gdbarch_info info,struct gdbarch * gdbarch)83 i386_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
84 {
85 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
86
87 /* Solaris is SVR4-based. */
88 i386_svr4_init_abi (info, gdbarch);
89
90 /* Solaris reserves space for its FPU emulator in `fpregset_t'.
91 There is also some space reserved for the registers of a Weitek
92 math coprocessor. */
93 tdep->gregset_reg_offset = i386_sol2_gregset_reg_offset;
94 tdep->gregset_num_regs = ARRAY_SIZE (i386_sol2_gregset_reg_offset);
95 tdep->sizeof_gregset = 19 * 4;
96 tdep->sizeof_fpregset = 380;
97
98 /* Signal trampolines are slightly different from SVR4. */
99 tdep->sigtramp_p = i386_sol2_sigtramp_p;
100 tdep->sigcontext_addr = i386_sol2_mcontext_addr;
101 tdep->sc_reg_offset = tdep->gregset_reg_offset;
102 tdep->sc_num_regs = tdep->gregset_num_regs;
103
104 set_solib_svr4_fetch_link_map_offsets
105 (gdbarch, svr4_ilp32_fetch_link_map_offsets);
106 }
107
108
109 static enum gdb_osabi
i386_sol2_osabi_sniffer(bfd * abfd)110 i386_sol2_osabi_sniffer (bfd *abfd)
111 {
112 /* If we have a section named .SUNW_version, then it is almost
113 certainly Solaris 2. */
114 if (bfd_get_section_by_name (abfd, ".SUNW_version"))
115 return GDB_OSABI_SOLARIS;
116
117 return GDB_OSABI_UNKNOWN;
118 }
119
120 /* Provide a prototype to silence -Wmissing-prototypes. */
121 void _initialize_i386_sol2_tdep (void);
122
123 void
_initialize_i386_sol2_tdep(void)124 _initialize_i386_sol2_tdep (void)
125 {
126 /* Register an ELF OS ABI sniffer for Solaris 2 binaries. */
127 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
128 i386_sol2_osabi_sniffer);
129
130 gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_SOLARIS,
131 i386_sol2_init_abi);
132 }
133