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-rw-r--r--bfd/elfcore.h226
1 files changed, 226 insertions, 0 deletions
diff --git a/bfd/elfcore.h b/bfd/elfcore.h
new file mode 100644
index 00000000000..e4454aac9d0
--- /dev/null
+++ b/bfd/elfcore.h
@@ -0,0 +1,226 @@
+/* ELF core file support for BFD.
+ Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
+
+This file is part of BFD, the Binary File Descriptor library.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+
+char*
+elf_core_file_failing_command (abfd)
+ bfd *abfd;
+{
+ return elf_tdata (abfd)->core_command;
+}
+
+int
+elf_core_file_failing_signal (abfd)
+ bfd *abfd;
+{
+ return elf_tdata (abfd)->core_signal;
+}
+
+
+boolean
+elf_core_file_matches_executable_p (core_bfd, exec_bfd)
+ bfd *core_bfd;
+ bfd *exec_bfd;
+{
+ char* corename;
+
+ /* xvecs must match if both are ELF files for the same target. */
+
+ if (core_bfd->xvec != exec_bfd->xvec)
+ {
+ bfd_set_error (bfd_error_system_call);
+ return false;
+ }
+
+ /* See if the name in the corefile matches the executable name. */
+
+ corename = elf_tdata (core_bfd)->core_program;
+ if (corename != NULL)
+ {
+ const char* execname = strrchr (exec_bfd->filename, '/');
+ execname = execname ? execname + 1 : exec_bfd->filename;
+
+ if (strcmp(execname, corename) != 0)
+ return false;
+ }
+
+ return true;
+}
+
+
+/* Core files are simply standard ELF formatted files that partition
+ the file using the execution view of the file (program header table)
+ rather than the linking view. In fact, there is no section header
+ table in a core file.
+
+ The process status information (including the contents of the general
+ register set) and the floating point register set are stored in a
+ segment of type PT_NOTE. We handcraft a couple of extra bfd sections
+ that allow standard bfd access to the general registers (.reg) and the
+ floating point registers (.reg2).
+
+ */
+
+const bfd_target *
+elf_core_file_p (abfd)
+ bfd *abfd;
+{
+ Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
+ Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
+ Elf_Internal_Phdr *i_phdrp; /* Elf program header, internal form */
+ unsigned int phindex;
+ struct elf_backend_data *ebd;
+
+ /* Read in the ELF header in external format. */
+ if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
+ {
+ if (bfd_get_error () != bfd_error_system_call)
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
+ }
+
+ /* Check the magic number. */
+ if (elf_file_p (&x_ehdr) == false)
+ {
+ wrong:
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
+ }
+
+ /* FIXME: Check EI_VERSION here ! */
+
+ /* Check the address size ("class"). */
+ if (x_ehdr.e_ident[EI_CLASS] != ELFCLASS)
+ goto wrong;
+
+ /* Check the byteorder. */
+ switch (x_ehdr.e_ident[EI_DATA])
+ {
+ case ELFDATA2MSB: /* Big-endian */
+ if (! bfd_big_endian (abfd))
+ goto wrong;
+ break;
+ case ELFDATA2LSB: /* Little-endian */
+ if (! bfd_little_endian (abfd))
+ goto wrong;
+ break;
+ default:
+ goto wrong;
+ }
+
+ /* Give abfd an elf_obj_tdata. */
+ elf_tdata (abfd) =
+ (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
+ if (elf_tdata (abfd) == NULL)
+ return NULL;
+
+ /* FIXME: from here on down, "goto wrong" will leak memory. */
+
+ /* Swap in the rest of the header, now that we have the byte order. */
+ i_ehdrp = elf_elfheader (abfd);
+ elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp);
+
+#if DEBUG & 1
+ elf_debug_file (i_ehdrp);
+#endif
+
+ ebd = get_elf_backend_data (abfd);
+
+ /* Check that the ELF e_machine field matches what this particular
+ BFD format expects. */
+
+ if (ebd->elf_machine_code != i_ehdrp->e_machine
+ && (ebd->elf_machine_alt1 == 0
+ || i_ehdrp->e_machine != ebd->elf_machine_alt1)
+ && (ebd->elf_machine_alt2 == 0
+ || i_ehdrp->e_machine != ebd->elf_machine_alt2))
+ {
+ const bfd_target * const *target_ptr;
+
+ if (ebd->elf_machine_code != EM_NONE)
+ goto wrong;
+
+ /* This is the generic ELF target. Let it match any ELF target
+ for which we do not have a specific backend. */
+
+ for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++)
+ {
+ struct elf_backend_data *back;
+
+ if ((*target_ptr)->flavour != bfd_target_elf_flavour)
+ continue;
+ back = (struct elf_backend_data *) (*target_ptr)->backend_data;
+ if (back->elf_machine_code == i_ehdrp->e_machine)
+ {
+ /* target_ptr is an ELF backend which matches this
+ object file, so reject the generic ELF target. */
+ goto wrong;
+ }
+ }
+ }
+
+ /* If there is no program header, or the type is not a core file, then
+ we are hosed. */
+ if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE)
+ goto wrong;
+
+ /* Does BFD's idea of the phdr size match the size
+ recorded in the file? */
+ if (i_ehdrp->e_phentsize != sizeof (Elf_External_Phdr))
+ goto wrong;
+
+ /* Allocate space for the program headers. */
+ i_phdrp = (Elf_Internal_Phdr *)
+ bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum);
+ if (!i_phdrp)
+ return NULL;
+
+ elf_tdata (abfd)->phdr = i_phdrp;
+
+ /* Read and convert to internal form. */
+ for (phindex = 0; phindex < i_ehdrp->e_phnum; ++phindex)
+ {
+ Elf_External_Phdr x_phdr;
+ if (bfd_read ((PTR) &x_phdr, sizeof (x_phdr), 1, abfd)
+ != sizeof (x_phdr))
+ return NULL;
+
+ elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex);
+ }
+
+ /* Process each program header. */
+ for (phindex = 0; phindex < i_ehdrp->e_phnum; ++phindex)
+ {
+ if (!_bfd_elfcore_section_from_phdr (abfd, i_phdrp + phindex, phindex))
+ return NULL;
+ }
+
+ /* Set the machine architecture. */
+ if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0))
+ {
+ /* It's OK if this fails for the generic target. */
+ if (ebd->elf_machine_code != EM_NONE)
+ return NULL;
+ }
+
+ /* Save the entry point from the ELF header. */
+ bfd_get_start_address (abfd) = i_ehdrp->e_entry;
+
+ return abfd->xvec;
+}