1 /* Target-dependent code for DICOS running on i386's, for GDB.
3 Copyright (C) 2008, 2009 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
22 #include "gdb_string.h"
24 #include "solib-target.h"
28 i386_dicos_push_dummy_code (struct gdbarch
*gdbarch
,
29 CORE_ADDR sp
, CORE_ADDR funaddr
,
30 struct value
**args
, int nargs
,
31 struct type
*value_type
,
32 CORE_ADDR
*real_pc
, CORE_ADDR
*bp_addr
,
33 struct regcache
*regcache
)
38 gdbarch_breakpoint_from_pc (gdbarch
, &bppc
, &bplen
);
39 *bp_addr
= sp
- bplen
;
46 i386_dicos_init_abi (struct gdbarch_info info
, struct gdbarch
*gdbarch
)
48 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
50 set_solib_ops (gdbarch
, &solib_target_so_ops
);
52 /* Every process, although has its own address space, sees the same
53 list of shared libraries. */
54 set_gdbarch_has_global_solist (gdbarch
, 1);
56 /* There's no (standard definition of) entry point or a guaranteed
57 text location we could find with a symbol where to place the call
58 dummy, so we put it on the stack. */
59 set_gdbarch_call_dummy_location (gdbarch
, ON_STACK
);
60 set_gdbarch_push_dummy_code (gdbarch
, i386_dicos_push_dummy_code
);
62 /* DICOS rewinds itself. Need to override the i386 default which is
63 to decrement the PC. */
64 set_gdbarch_decr_pc_after_break (gdbarch
, 0);
67 /* Look in the elf symbol table of ABFD for a symbol named WANTED.
68 Return true if found. */
70 i386_dicos_bfd_has_symbol_p (bfd
*abfd
, const char *wanted
)
74 asymbol
**symbol_table
= NULL
;
76 storage_needed
= bfd_get_symtab_upper_bound (abfd
);
77 if (storage_needed
< 0)
79 warning (_("Can't read elf symbols from %s: %s"), bfd_get_filename (abfd
),
80 bfd_errmsg (bfd_get_error ()));
84 if (storage_needed
> 0)
88 symbol_table
= xmalloc (storage_needed
);
89 symcount
= bfd_canonicalize_symtab (abfd
, symbol_table
);
92 warning (_("Can't read elf symbols from %s: %s"),
93 bfd_get_filename (abfd
),
94 bfd_errmsg (bfd_get_error ()));
97 for (i
= 0; i
< symcount
; i
++)
99 asymbol
*sym
= symbol_table
[i
];
100 if (sym
->name
!= NULL
101 && wanted
[0] == sym
->name
[0]
102 && strcmp (wanted
+ 1, sym
->name
+ 1) == 0)
111 xfree (symbol_table
);
115 static enum gdb_osabi
116 i386_dicos_osabi_sniffer (bfd
*abfd
)
118 char *target_name
= bfd_get_target (abfd
);
120 /* DICOS debug info files don't have a .note.ABI-tag marker or
121 something similar. We do know there's always a "header" section
122 of 36 bytes, and there's always a "Dicos_loadModuleInfo" symbol
123 defined. Look for the section first, as that should be
125 if (strcmp (target_name
, "elf32-i386") == 0)
127 asection
*section
= bfd_get_section_by_name (abfd
, "header");
129 && bfd_section_size (abfd
, section
) == 36
130 && i386_dicos_bfd_has_symbol_p (abfd
, "Dicos_loadModuleInfo"))
131 return GDB_OSABI_DICOS
;
134 return GDB_OSABI_UNKNOWN
;
137 /* Provide a prototype to silence -Wmissing-prototypes. */
138 void _initialize_i386_dicos_tdep (void);
141 _initialize_i386_dicos_tdep (void)
143 gdbarch_register_osabi_sniffer (bfd_arch_i386
, bfd_target_elf_flavour
,
144 i386_dicos_osabi_sniffer
);
146 gdbarch_register_osabi (bfd_arch_i386
, 0, GDB_OSABI_DICOS
,
147 i386_dicos_init_abi
);