xref: /openbsd-src/gnu/usr.bin/binutils/bfd/netbsd-core.c (revision 31ec35ba769d6bc6b0f746006f8727a08d8efe1d)
1 /* BFD back end for NetBSD style core files
2    Copyright 1988, 1989, 1991, 1992, 1993, 1996, 1998, 1999, 2000, 2001,
3    2002, 2003, 2004
4    Free Software Foundation, Inc.
5    Written by Paul Kranenburg, EUR
6 
7 This file is part of BFD, the Binary File Descriptor library.
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 2 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, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
22 
23 #include "bfd.h"
24 #include "sysdep.h"
25 #include "libbfd.h"
26 #include "libaout.h"           /* BFD a.out internal data structures */
27 
28 #include <sys/param.h>
29 #include <sys/dir.h>
30 #include <signal.h>
31 #include <sys/core.h>
32 
33 /* The machine ID for OpenBSD/sparc64 and older versions of
34    NetBSD/sparc64 overlaps with M_MIPS1.  */
35 #define M_SPARC64_OPENBSD	M_MIPS1
36 
37 /* Offset of StackGhost cookie within `struct md_coredump' on
38    OpenBSD/sparc.  */
39 #define SPARC_WCOOKIE_OFFSET	344
40 
41 /* Offset of StackGhost cookie within `struct md_coredump' on
42    OpenBSD/sparc64.  */
43 #define SPARC64_WCOOKIE_OFFSET	832
44 
45 struct netbsd_core_struct {
46 	struct core core;
47 } *rawptr;
48 
49 /* forward declarations */
50 
51 static const bfd_target *netbsd_core_file_p
52   PARAMS ((bfd *abfd));
53 static char *netbsd_core_file_failing_command
54   PARAMS ((bfd *abfd));
55 static int netbsd_core_file_failing_signal
56   PARAMS ((bfd *abfd));
57 static bfd_boolean netbsd_core_file_matches_executable_p
58   PARAMS ((bfd *core_bfd, bfd *exec_bfd));
59 static void swap_abort
60   PARAMS ((void));
61 
62 /* Handle NetBSD-style core dump file.  */
63 
64 static const bfd_target *
netbsd_core_file_p(abfd)65 netbsd_core_file_p (abfd)
66      bfd *abfd;
67 
68 {
69   int i, val;
70   file_ptr offset;
71   asection *asect;
72   struct core core;
73   struct coreseg coreseg;
74   bfd_size_type amt = sizeof core;
75 
76   val = bfd_bread ((void *) &core, amt, abfd);
77   if (val != sizeof core)
78     {
79       /* Too small to be a core file */
80       bfd_set_error (bfd_error_wrong_format);
81       return 0;
82     }
83 
84   if (CORE_GETMAGIC (core) != COREMAGIC)
85     {
86       bfd_set_error (bfd_error_wrong_format);
87       return 0;
88     }
89 
90   amt = sizeof (struct netbsd_core_struct);
91   rawptr = (struct netbsd_core_struct *) bfd_zalloc (abfd, amt);
92   if (rawptr == NULL)
93     return 0;
94 
95   rawptr->core = core;
96   abfd->tdata.netbsd_core_data = rawptr;
97 
98   offset = core.c_hdrsize;
99   for (i = 0; i < core.c_nseg; i++)
100     {
101       const char *sname;
102       flagword flags;
103 
104       if (bfd_seek (abfd, offset, SEEK_SET) != 0)
105 	goto punt;
106 
107       val = bfd_bread ((void *) &coreseg, (bfd_size_type) sizeof coreseg, abfd);
108       if (val != sizeof coreseg)
109 	{
110 	  bfd_set_error (bfd_error_file_truncated);
111 	  goto punt;
112 	}
113       if (CORE_GETMAGIC (coreseg) != CORESEGMAGIC)
114 	{
115 	  bfd_set_error (bfd_error_wrong_format);
116 	  goto punt;
117 	}
118 
119       offset += core.c_seghdrsize;
120 
121       switch (CORE_GETFLAG (coreseg))
122 	{
123 	case CORE_CPU:
124 	  sname = ".reg";
125 	  flags = SEC_ALLOC + SEC_HAS_CONTENTS;
126 	  break;
127 	case CORE_DATA:
128 	  sname = ".data";
129 	  flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
130 	  break;
131 	case CORE_STACK:
132 	  sname = ".stack";
133 	  flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
134 	  break;
135 	default:
136 	  sname = ".unknown";
137 	  flags = SEC_ALLOC + SEC_HAS_CONTENTS;
138 	  break;
139 	}
140       asect = bfd_make_section_anyway (abfd, sname);
141       if (asect == NULL)
142 	goto punt;
143 
144       asect->flags = flags;
145       asect->_raw_size = coreseg.c_size;
146       asect->vma = coreseg.c_addr;
147       asect->filepos = offset;
148       asect->alignment_power = 2;
149 
150       if (CORE_GETFLAG (coreseg) == CORE_CPU)
151 	{
152 	  bfd_size_type wcookie_offset;
153 
154 	  switch (CORE_GETMID (core))
155 	    {
156 	    case M_SPARC_NETBSD:
157 	      wcookie_offset = SPARC_WCOOKIE_OFFSET;
158 	      break;
159 	    case M_SPARC64_OPENBSD:
160 	      wcookie_offset = SPARC64_WCOOKIE_OFFSET;
161 	      break;
162 	    default:
163 	      wcookie_offset = 0;
164 	      break;
165 	    }
166 
167 	  if (wcookie_offset > 0 && coreseg.c_size > wcookie_offset)
168 	    {
169 	      /* Truncate the .reg section.  */
170 	      asect->_raw_size = wcookie_offset;
171 
172 	      /* And create the .wcookie section.  */
173 	      asect = bfd_make_section_anyway (abfd, ".wcookie");
174 	      if (asect == NULL)
175 		goto punt;
176 
177 	      asect->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
178 	      asect->_raw_size = coreseg.c_size - wcookie_offset;
179 	      asect->vma = 0;
180 	      asect->filepos = offset + wcookie_offset;
181 	      asect->alignment_power = 2;
182 	    }
183 	}
184 
185       offset += coreseg.c_size;
186     }
187 
188   /* Set architecture from machine ID.  */
189   switch (CORE_GETMID (core))
190     {
191     case M_X86_64_NETBSD:
192       bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
193       break;
194 
195     case M_386_NETBSD:
196       bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386);
197       break;
198 
199     case M_68K_NETBSD:
200     case M_68K4K_NETBSD:
201       bfd_default_set_arch_mach (abfd, bfd_arch_m68k, 0);
202       break;
203 
204     case M_88K_OPENBSD:
205       bfd_default_set_arch_mach (abfd, bfd_arch_m88k, 0);
206       break;
207 
208     case M_HPPA_OPENBSD:
209       bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 0);
210       break;
211 
212     case M_POWERPC_NETBSD:
213       bfd_default_set_arch_mach (abfd, bfd_arch_powerpc, bfd_mach_ppc);
214       break;
215 
216     case M_SPARC_NETBSD:
217       bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc);
218       break;
219 
220     case M_SPARC64_NETBSD:
221     case M_SPARC64_OPENBSD:
222       bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc_v9);
223       break;
224 
225     case M_VAX_NETBSD:
226     case M_VAX4K_NETBSD:
227       bfd_default_set_arch_mach (abfd, bfd_arch_vax, 0);
228       break;
229     }
230 
231   /* OK, we believe you.  You're a core file (sure, sure).  */
232   return abfd->xvec;
233 
234  punt:
235   bfd_release (abfd, abfd->tdata.any);
236   abfd->tdata.any = NULL;
237   bfd_section_list_clear (abfd);
238   return 0;
239 }
240 
241 static char*
netbsd_core_file_failing_command(abfd)242 netbsd_core_file_failing_command (abfd)
243 	bfd *abfd;
244 {
245  /*return core_command (abfd);*/
246   return abfd->tdata.netbsd_core_data->core.c_name;
247 }
248 
249 static int
netbsd_core_file_failing_signal(abfd)250 netbsd_core_file_failing_signal (abfd)
251 	bfd *abfd;
252 {
253   /*return core_signal (abfd);*/
254   return abfd->tdata.netbsd_core_data->core.c_signo;
255 }
256 
257 static bfd_boolean
netbsd_core_file_matches_executable_p(core_bfd,exec_bfd)258 netbsd_core_file_matches_executable_p  (core_bfd, exec_bfd)
259      bfd *core_bfd ATTRIBUTE_UNUSED;
260      bfd *exec_bfd ATTRIBUTE_UNUSED;
261 {
262   return TRUE;		/* FIXME, We have no way of telling at this point */
263 }
264 
265 /* If somebody calls any byte-swapping routines, shoot them.  */
266 static void
swap_abort()267 swap_abort ()
268 {
269   abort (); /* This way doesn't require any declaration for ANSI to fuck up */
270 }
271 
272 #define	NO_GET ((bfd_vma (*) (const void *)) swap_abort)
273 #define	NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
274 #define	NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
275 #define	NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
276 #define	NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
277 #define	NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
278 
279 const bfd_target netbsd_core_vec =
280   {
281     "netbsd-core",
282     bfd_target_unknown_flavour,
283     BFD_ENDIAN_UNKNOWN,		/* target byte order */
284     BFD_ENDIAN_UNKNOWN,		/* target headers byte order */
285     (HAS_RELOC | EXEC_P |	/* object flags */
286      HAS_LINENO | HAS_DEBUG |
287      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
288     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
289     0,			                                   /* symbol prefix */
290     ' ',						   /* ar_pad_char */
291     16,							   /* ar_max_namelen */
292     NO_GET64, NO_GETS64, NO_PUT64,	/* 64 bit data.  */
293     NO_GET, NO_GETS, NO_PUT,		/* 32 bit data.  */
294     NO_GET, NO_GETS, NO_PUT,		/* 16 bit data.  */
295     NO_GET64, NO_GETS64, NO_PUT64,	/* 64 bit hdrs.  */
296     NO_GET, NO_GETS, NO_PUT,		/* 32 bit hdrs.  */
297     NO_GET, NO_GETS, NO_PUT,		/* 16 bit hdrs.  */
298 
299     {				/* bfd_check_format */
300       _bfd_dummy_target,		/* unknown format */
301       _bfd_dummy_target,		/* object file */
302       _bfd_dummy_target,		/* archive */
303       netbsd_core_file_p		/* a core file */
304     },
305     {				/* bfd_set_format */
306       bfd_false, bfd_false,
307       bfd_false, bfd_false
308     },
309     {				/* bfd_write_contents */
310       bfd_false, bfd_false,
311       bfd_false, bfd_false
312     },
313 
314     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
315     BFD_JUMP_TABLE_COPY (_bfd_generic),
316     BFD_JUMP_TABLE_CORE (netbsd),
317     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
318     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
319     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
320     BFD_JUMP_TABLE_WRITE (_bfd_generic),
321     BFD_JUMP_TABLE_LINK (_bfd_nolink),
322     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
323 
324     NULL,
325 
326     (PTR) 0			/* backend_data */
327   };
328