/* ELF core file support for BFD.
- Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
+ Copyright 1995, 1996, 1997, 1998, 2000, 2001
+ Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
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_signal;
}
-
boolean
elf_core_file_matches_executable_p (core_bfd, exec_bfd)
bfd *core_bfd;
{
char* corename;
- /* xvecs must match if both are ELF files for the same target. */
+ /* xvecs must match if both are ELF files for the same target. */
if (core_bfd->xvec != exec_bfd->xvec)
{
return false;
}
- /* See if the name in the corefile matches the executable name. */
+ /* See if the name in the corefile matches the executable name. */
corename = elf_tdata (core_bfd)->core_program;
if (corename != NULL)
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
Elf_Internal_Phdr *i_phdrp; /* Elf program header, internal form */
unsigned int phindex;
struct elf_backend_data *ebd;
+ struct bfd_preserve preserve;
+ struct elf_obj_tdata *new_tdata = NULL;
+ bfd_size_type amt;
+
+ preserve.arch_info = abfd->arch_info;
/* Read in the ELF header in external format. */
- if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
+ if (bfd_bread ((PTR) &x_ehdr, (bfd_size_type) sizeof (x_ehdr), 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. */
+ /* Check the magic number. */
if (elf_file_p (&x_ehdr) == false)
- {
- wrong:
- bfd_set_error (bfd_error_wrong_format);
- return NULL;
- }
+ goto wrong;
/* FIXME: Check EI_VERSION here ! */
- /* Check the address size ("class"). */
+ /* Check the address size ("class"). */
if (x_ehdr.e_ident[EI_CLASS] != ELFCLASS)
goto wrong;
- /* Check the byteorder. */
+ /* Check the byteorder. */
switch (x_ehdr.e_ident[EI_DATA])
{
case ELFDATA2MSB: /* Big-endian */
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)
+ /* Give abfd an elf_obj_tdata. */
+ amt = sizeof (struct elf_obj_tdata);
+ new_tdata = (struct elf_obj_tdata *) bfd_zalloc (abfd, amt);
+ if (new_tdata == 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. */
+ preserve.tdata = elf_tdata (abfd);
+ elf_tdata (abfd) = new_tdata;
+
+ /* Clear section information, since there might be a recognized bfd that
+ we now check if we can replace, and we don't want to append to it. */
+ preserve.sections = abfd->sections;
+ preserve.section_tail = abfd->section_tail;
+ preserve.section_count = abfd->section_count;
+ preserve.section_htab = abfd->section_htab;
+ abfd->sections = NULL;
+ abfd->section_tail = &abfd->sections;
+ abfd->section_count = 0;
+ if (!bfd_hash_table_init (&abfd->section_htab, bfd_section_hash_newfunc))
+ goto fail;
+
+ /* 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 there is no program header, or the type is not a core file, then
- we are hosed. */
+ we are hosed. */
if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE)
goto wrong;
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);
+ /* Move to the start of the program headers. */
+ if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0)
+ goto wrong;
+
+ /* Allocate space for the program headers. */
+ amt = sizeof (*i_phdrp) * i_ehdrp->e_phnum;
+ i_phdrp = (Elf_Internal_Phdr *) bfd_alloc (abfd, amt);
if (!i_phdrp)
- return NULL;
+ goto fail;
elf_tdata (abfd)->phdr = i_phdrp;
- /* Read and convert to internal form. */
+ /* 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)
+ if (bfd_bread ((PTR) &x_phdr, (bfd_size_type) sizeof (x_phdr), abfd)
!= sizeof (x_phdr))
- return NULL;
+ goto fail;
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. */
+ /* Set the machine architecture. Do this before processing the
+ program headers since we need to know the architecture type
+ when processing the notes of some systems' core files. */
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;
+ goto fail;
+ }
+
+ /* Process each program header. */
+ for (phindex = 0; phindex < i_ehdrp->e_phnum; ++phindex)
+ {
+ if (! bfd_section_from_phdr (abfd, i_phdrp + phindex, (int) phindex))
+ goto fail;
}
- /* Save the entry point from the ELF header. */
+ /* Save the entry point from the ELF header. */
bfd_get_start_address (abfd) = i_ehdrp->e_entry;
+ /* Let the backend double check the format and override global
+ information. */
+ if (ebd->elf_backend_object_p)
+ {
+ if ((*ebd->elf_backend_object_p) (abfd) == false)
+ goto wrong;
+ }
+
+ bfd_hash_table_free (&preserve.section_htab);
return abfd->xvec;
+
+wrong:
+ /* There is way too much undoing of half-known state here. The caller,
+ bfd_check_format_matches, really shouldn't iterate on live bfd's to
+ check match/no-match like it does. We have to rely on that a call to
+ bfd_default_set_arch_mach with the previously known mach, undoes what
+ was done by the first bfd_default_set_arch_mach (with mach 0) here.
+ For this to work, only elf-data and the mach may be changed by the
+ target-specific elf_backend_object_p function. Note that saving the
+ whole bfd here and restoring it would be even worse; the first thing
+ you notice is that the cached bfd file position gets out of sync. */
+ bfd_set_error (bfd_error_wrong_format);
+
+fail:
+ abfd->arch_info = preserve.arch_info;
+ if (new_tdata != NULL)
+ {
+ /* bfd_release frees all memory more recently bfd_alloc'd than
+ its arg, as well as its arg. */
+ bfd_release (abfd, new_tdata);
+ elf_tdata (abfd) = preserve.tdata;
+ abfd->section_htab = preserve.section_htab;
+ abfd->sections = preserve.sections;
+ abfd->section_tail = preserve.section_tail;
+ abfd->section_count = preserve.section_count;
+ }
+ return NULL;
}
projects / deliverable / binutils-gdb.git / blobdiff