1 /* Target-dependent code for Solaris x86.
2
3 Copyright (C) 2002-2024 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 "value.h"
21 #include "osabi.h"
22
23 #include "sol2-tdep.h"
24 #include "i386-tdep.h"
25 #include "solib-svr4.h"
26
27 /* From <ia32/sys/reg.h>. */
28 static int i386_sol2_gregset_reg_offset[] =
29 {
30 11 * 4, /* %eax */
31 10 * 4, /* %ecx */
32 9 * 4, /* %edx */
33 8 * 4, /* %ebx */
34 17 * 4, /* %esp */
35 6 * 4, /* %ebp */
36 5 * 4, /* %esi */
37 4 * 4, /* %edi */
38 14 * 4, /* %eip */
39 16 * 4, /* %eflags */
40 15 * 4, /* %cs */
41 18 * 4, /* %ss */
42 3 * 4, /* %ds */
43 2 * 4, /* %es */
44 1 * 4, /* %fs */
45 0 * 4 /* %gs */
46 };
47
48 /* Solaris doesn't have a `struct sigcontext', but it does have a
49 `mcontext_t' that contains the saved set of machine registers. */
50
51 static CORE_ADDR
i386_sol2_mcontext_addr(const frame_info_ptr & this_frame)52 i386_sol2_mcontext_addr (const frame_info_ptr &this_frame)
53 {
54 CORE_ADDR sp, ucontext_addr;
55
56 sp = get_frame_register_unsigned (this_frame, I386_ESP_REGNUM);
57 ucontext_addr = get_frame_memory_unsigned (this_frame, sp + 8, 4);
58
59 return ucontext_addr + 36;
60 }
61
62 /* Solaris 2. */
63
64 static void
i386_sol2_init_abi(struct gdbarch_info info,struct gdbarch * gdbarch)65 i386_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
66 {
67 i386_gdbarch_tdep *tdep = gdbarch_tdep<i386_gdbarch_tdep> (gdbarch);
68
69 /* Solaris is SVR4-based. */
70 i386_svr4_init_abi (info, gdbarch);
71
72 sol2_init_abi (info, gdbarch);
73
74 /* Solaris reserves space for its FPU emulator in `fpregset_t'.
75 There is also some space reserved for the registers of a Weitek
76 math coprocessor. */
77 tdep->gregset_reg_offset = i386_sol2_gregset_reg_offset;
78 tdep->gregset_num_regs = ARRAY_SIZE (i386_sol2_gregset_reg_offset);
79 tdep->sizeof_gregset = 19 * 4;
80 tdep->sizeof_fpregset = 380;
81
82 /* Signal trampolines are slightly different from SVR4. */
83 tdep->sigtramp_p = sol2_sigtramp_p;
84 tdep->sigcontext_addr = i386_sol2_mcontext_addr;
85 tdep->sc_reg_offset = tdep->gregset_reg_offset;
86 tdep->sc_num_regs = tdep->gregset_num_regs;
87
88 /* Solaris has SVR4-style shared libraries. */
89 set_solib_svr4_fetch_link_map_offsets
90 (gdbarch, svr4_ilp32_fetch_link_map_offsets);
91 }
92
93
94 static enum gdb_osabi
i386_sol2_osabi_sniffer(bfd * abfd)95 i386_sol2_osabi_sniffer (bfd *abfd)
96 {
97 /* If we have a section named .SUNW_version, then it is almost
98 certainly Solaris 2. */
99 if (bfd_get_section_by_name (abfd, ".SUNW_version"))
100 return GDB_OSABI_SOLARIS;
101
102 return GDB_OSABI_UNKNOWN;
103 }
104
105 void _initialize_i386_sol2_tdep ();
106 void
_initialize_i386_sol2_tdep()107 _initialize_i386_sol2_tdep ()
108 {
109 /* Register an ELF OS ABI sniffer for Solaris 2 binaries. */
110 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
111 i386_sol2_osabi_sniffer);
112
113 gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_SOLARIS,
114 i386_sol2_init_abi);
115 }
116