Add field ``name'' to floatformat.
[binutils.git] / bfd / elfcore.h
blobec03ec3f637a989460c37f19393db4a600b3a63d
1 /* ELF core file support for BFD.
2 Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 char*
22 elf_core_file_failing_command (abfd)
23 bfd *abfd;
25 return elf_tdata (abfd)->core_command;
28 int
29 elf_core_file_failing_signal (abfd)
30 bfd *abfd;
32 return elf_tdata (abfd)->core_signal;
36 boolean
37 elf_core_file_matches_executable_p (core_bfd, exec_bfd)
38 bfd *core_bfd;
39 bfd *exec_bfd;
41 char* corename;
43 /* xvecs must match if both are ELF files for the same target. */
45 if (core_bfd->xvec != exec_bfd->xvec)
47 bfd_set_error (bfd_error_system_call);
48 return false;
51 /* See if the name in the corefile matches the executable name. */
53 corename = elf_tdata (core_bfd)->core_program;
54 if (corename != NULL)
56 const char* execname = strrchr (exec_bfd->filename, '/');
57 execname = execname ? execname + 1 : exec_bfd->filename;
59 if (strcmp(execname, corename) != 0)
60 return false;
63 return true;
67 /* Core files are simply standard ELF formatted files that partition
68 the file using the execution view of the file (program header table)
69 rather than the linking view. In fact, there is no section header
70 table in a core file.
72 The process status information (including the contents of the general
73 register set) and the floating point register set are stored in a
74 segment of type PT_NOTE. We handcraft a couple of extra bfd sections
75 that allow standard bfd access to the general registers (.reg) and the
76 floating point registers (.reg2).
80 const bfd_target *
81 elf_core_file_p (abfd)
82 bfd *abfd;
84 Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
85 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
86 Elf_Internal_Phdr *i_phdrp = NULL; /* Elf program header, internal form */
87 unsigned int phindex;
88 struct elf_backend_data *ebd;
89 struct elf_obj_tdata *preserved_tdata = elf_tdata (abfd);
90 struct elf_obj_tdata *new_tdata = NULL;
92 /* Read in the ELF header in external format. */
93 if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
95 if (bfd_get_error () != bfd_error_system_call)
96 bfd_set_error (bfd_error_wrong_format);
97 return NULL;
100 /* Check the magic number. */
101 if (elf_file_p (&x_ehdr) == false)
103 goto wrong;
106 /* FIXME: Check EI_VERSION here ! */
108 /* Check the address size ("class"). */
109 if (x_ehdr.e_ident[EI_CLASS] != ELFCLASS)
110 goto wrong;
112 /* Check the byteorder. */
113 switch (x_ehdr.e_ident[EI_DATA])
115 case ELFDATA2MSB: /* Big-endian */
116 if (! bfd_big_endian (abfd))
117 goto wrong;
118 break;
119 case ELFDATA2LSB: /* Little-endian */
120 if (! bfd_little_endian (abfd))
121 goto wrong;
122 break;
123 default:
124 goto wrong;
127 /* Give abfd an elf_obj_tdata. */
128 new_tdata =
129 (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
130 if (new_tdata == NULL)
131 return NULL;
132 elf_tdata (abfd) = new_tdata;
134 /* Swap in the rest of the header, now that we have the byte order. */
135 i_ehdrp = elf_elfheader (abfd);
136 elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp);
138 #if DEBUG & 1
139 elf_debug_file (i_ehdrp);
140 #endif
142 ebd = get_elf_backend_data (abfd);
144 /* Check that the ELF e_machine field matches what this particular
145 BFD format expects. */
147 if (ebd->elf_machine_code != i_ehdrp->e_machine
148 && (ebd->elf_machine_alt1 == 0
149 || i_ehdrp->e_machine != ebd->elf_machine_alt1)
150 && (ebd->elf_machine_alt2 == 0
151 || i_ehdrp->e_machine != ebd->elf_machine_alt2))
153 const bfd_target * const *target_ptr;
155 if (ebd->elf_machine_code != EM_NONE)
156 goto wrong;
158 /* This is the generic ELF target. Let it match any ELF target
159 for which we do not have a specific backend. */
161 for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++)
163 struct elf_backend_data *back;
165 if ((*target_ptr)->flavour != bfd_target_elf_flavour)
166 continue;
167 back = (struct elf_backend_data *) (*target_ptr)->backend_data;
168 if (back->elf_machine_code == i_ehdrp->e_machine)
170 /* target_ptr is an ELF backend which matches this
171 object file, so reject the generic ELF target. */
172 goto wrong;
177 /* If there is no program header, or the type is not a core file, then
178 we are hosed. */
179 if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE)
180 goto wrong;
182 /* Does BFD's idea of the phdr size match the size
183 recorded in the file? */
184 if (i_ehdrp->e_phentsize != sizeof (Elf_External_Phdr))
185 goto wrong;
187 /* Allocate space for the program headers. */
188 i_phdrp = (Elf_Internal_Phdr *)
189 bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum);
190 if (!i_phdrp)
191 goto fail;
193 elf_tdata (abfd)->phdr = i_phdrp;
195 /* Read and convert to internal form. */
196 for (phindex = 0; phindex < i_ehdrp->e_phnum; ++phindex)
198 Elf_External_Phdr x_phdr;
199 if (bfd_read ((PTR) &x_phdr, sizeof (x_phdr), 1, abfd)
200 != sizeof (x_phdr))
201 goto fail;
203 elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex);
206 /* Process each program header. */
207 for (phindex = 0; phindex < i_ehdrp->e_phnum; ++phindex)
209 if (!_bfd_elfcore_section_from_phdr (abfd, i_phdrp + phindex, phindex))
210 goto fail;
213 /* Set the machine architecture. */
214 if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0))
216 /* It's OK if this fails for the generic target. */
217 if (ebd->elf_machine_code != EM_NONE)
218 goto fail;
221 /* Save the entry point from the ELF header. */
222 bfd_get_start_address (abfd) = i_ehdrp->e_entry;
224 /* Let the backend double check the format and override global
225 information. */
226 if (ebd->elf_backend_object_p)
228 if ((*ebd->elf_backend_object_p) (abfd) == false)
229 goto wrong;
232 return abfd->xvec;
234 wrong:
235 bfd_set_error (bfd_error_wrong_format);
236 fail:
237 if (i_phdrp != NULL)
238 bfd_release (abfd, i_phdrp);
239 if (new_tdata != NULL)
240 bfd_release (abfd, new_tdata);
241 elf_tdata (abfd) = preserved_tdata;
242 return NULL;