*/
-#include <ansidecl.h>
-#include <sysdep.h>
#include "bfd.h"
+#include "sysdep.h"
#include "libbfd.h"
#include "obstack.h"
#include "elf-common.h"
}
+/* Translate an ELF program header table entry in external format into an
+ ELF program header table entry in internal format. */
+
+static void
+DEFUN(bfd_swap_phdr_in,(abfd, src, dst),
+ bfd *abfd AND
+ Elf_External_Phdr *src AND
+ Elf_Internal_Phdr *dst)
+{
+ dst -> p_type = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_type);
+ dst -> p_offset = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_offset);
+ dst -> p_vaddr = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_vaddr);
+ dst -> p_paddr = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_paddr);
+ dst -> p_filesz = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_filesz);
+ dst -> p_memsz = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_memsz);
+ dst -> p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_flags);
+ dst -> p_align = bfd_h_get_32 (abfd, (bfd_byte *) src -> p_align);
+}
+
+
/* Create a new bfd section from an ELF section header. */
static boolean
return (true);
}
+/* Create a new bfd section from an ELF program header.
+
+ Since program segments have no names, we generate a synthetic name
+ of the form segment<NUM>, where NUM is generally the index in the
+ program header table. For segments that are split (see below) we
+ generate the names segment<NUM>a and segment<NUM>b.
+
+ Note that some program segments may have a file size that is different than
+ (less than) the memory size. All this means is that at execution the
+ system must allocate the amount of memory specified by the memory size,
+ but only initialize it with the first "file size" bytes read from the
+ file. This would occur for example, with program segments consisting
+ of combined data+bss.
+
+ To handle the above situation, this routine generates TWO bfd sections
+ for the single program segment. The first has the length specified by
+ the file size of the segment, and the second has the length specified
+ by the difference between the two sizes. In effect, the segment is split
+ into it's initialized and uninitialized parts.
+
+ */
+
+static boolean
+DEFUN(bfd_section_from_phdr, (abfd, hdr, index),
+ bfd *abfd AND
+ Elf_Internal_Phdr *hdr AND
+ int index)
+{
+ asection *newsect;
+ char *name;
+ char namebuf[64];
+ int split;
+
+ split = ((hdr -> p_memsz > 0) &&
+ (hdr -> p_filesz > 0) &&
+ (hdr -> p_memsz > hdr -> p_filesz));
+ sprintf (namebuf, split ? "segment%da" : "segment%d", index);
+ name = bfd_alloc (abfd, strlen (namebuf) + 1);
+ (void) strcpy (name, namebuf);
+ newsect = bfd_make_section (abfd, name);
+ newsect -> vma = hdr -> p_vaddr;
+ newsect -> size = hdr -> p_filesz;
+ newsect -> filepos = hdr -> p_offset;
+ newsect -> flags |= SEC_HAS_CONTENTS;
+ if (hdr -> p_type == PT_LOAD)
+ {
+ newsect -> flags |= SEC_ALLOC;
+ newsect -> flags |= SEC_LOAD;
+ if (hdr -> p_flags & PF_X)
+ {
+ /* FIXME: all we known is that it has execute PERMISSION,
+ may be data. */
+ newsect -> flags |= SEC_CODE;
+ }
+ }
+ if (!(hdr -> p_flags & PF_W))
+ {
+ newsect -> flags |= SEC_READONLY;
+ }
+
+ if (split)
+ {
+ sprintf (namebuf, "segment%db", index);
+ name = bfd_alloc (abfd, strlen (namebuf) + 1);
+ (void) strcpy (name, namebuf);
+ newsect = bfd_make_section (abfd, name);
+ newsect -> vma = hdr -> p_vaddr + hdr -> p_filesz;
+ newsect -> size = hdr -> p_memsz - hdr -> p_filesz;
+ if (hdr -> p_type == PT_LOAD)
+ {
+ newsect -> flags |= SEC_ALLOC;
+ if (hdr -> p_flags & PF_X)
+ {
+ newsect -> flags |= SEC_CODE;
+ }
+ }
+ if (!(hdr -> p_flags & PF_W))
+ {
+ newsect -> flags |= SEC_READONLY;
+ }
+ }
+
+ return (true);
+}
+
/* Begin processing a given object.
First we validate the file by reading in the ELF header and checking
/* Now that we know the byte order, swap in the rest of the header */
bfd_swap_ehdr_in (abfd, &x_ehdr, &i_ehdr);
- if (x_ehdr.e_shoff == 0)
+
+ /* If there is no section header table, we're hosed. */
+ if (i_ehdr.e_shoff == 0)
goto wrong;
if (i_ehdr.e_type == ET_EXEC || i_ehdr.e_type == ET_DYN)
return (abfd->xvec);
}
+/* 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.
+ */
+
+static bfd_target *
+DEFUN (elf_core_file_p, (abfd), bfd *abfd)
+{
+ Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
+ Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */
+ Elf_External_Phdr *x_phdr; /* Program header table, external form */
+ Elf_Internal_Phdr *i_phdr; /* Program header table, internal form */
+ int phindex;
+
+ /* Read in the ELF header in external format. */
+
+ if (bfd_read ((PTR) &x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
+ {
+ bfd_error = system_call_error;
+ return (NULL);
+ }
+
+ /* Now check to see if we have a valid ELF file, and one that BFD can
+ make use of. The magic number must match, the address size ('class')
+ and byte-swapping must match our XVEC entry, and it must have a
+ program header table (FIXME: See comments re segments at top of this
+ file). */
+
+ if (x_ehdr.e_ident[EI_MAG0] != ELFMAG0 ||
+ x_ehdr.e_ident[EI_MAG1] != ELFMAG1 ||
+ x_ehdr.e_ident[EI_MAG2] != ELFMAG2 ||
+ x_ehdr.e_ident[EI_MAG3] != ELFMAG3)
+ {
+wrong:
+ bfd_error = wrong_format;
+ return (NULL);
+ }
+
+ /* FIXME, Check EI_VERSION here ! */
+
+ switch (x_ehdr.e_ident[EI_CLASS]) {
+ case ELFCLASSNONE: /* address size not specified */
+ goto wrong; /* No support if can't tell address size */
+ case ELFCLASS32: /* 32-bit addresses */
+ break;
+ case ELFCLASS64: /* 64-bit addresses */
+ goto wrong; /* FIXME: 64 bits not yet supported */
+ default:
+ goto wrong; /* No support if unknown address class */
+ }
+
+ /* Switch xvec to match the specified byte order. */
+ switch (x_ehdr.e_ident[EI_DATA]) {
+ case ELFDATA2MSB: /* Big-endian */
+ abfd->xvec = &elf_big_vec;
+ break;
+ case ELFDATA2LSB: /* Little-endian */
+ abfd->xvec = &elf_little_vec;
+ case ELFDATANONE: /* No data encoding specified */
+ default: /* Unknown data encoding specified */
+ goto wrong;
+ }
+
+ /* Now that we know the byte order, swap in the rest of the header */
+ bfd_swap_ehdr_in (abfd, &x_ehdr, &i_ehdr);
+
+ /* If there is no program header, or the type is not a core file, then
+ we are hosed. */
+ if (i_ehdr.e_phoff == 0 || i_ehdr.e_type != ET_CORE)
+ goto wrong;
+
+ /* Allocate space for copies of the program header table in external
+ and internal form, seek to the program header table in the file,
+ read it in, and convert it to internal form. As a simple sanity
+ check, verify that the what BFD thinks is the size of each program
+ header table entry actually matches the size recorded in the file. */
+
+ if (i_ehdr.e_phentsize != sizeof (*x_phdr))
+ goto wrong;
+ if ((x_phdr = (Elf_External_Phdr *)
+ bfd_alloc (abfd, sizeof (*x_phdr) * i_ehdr.e_phnum)) == NULL)
+ {
+ bfd_error = no_memory;
+ return (NULL);
+ }
+ if ((i_phdr = (Elf_Internal_Phdr *)
+ bfd_alloc (abfd, sizeof (*i_phdr) * i_ehdr.e_phnum)) == NULL)
+ {
+ bfd_error = no_memory;
+ return (NULL);
+ }
+ if (bfd_seek (abfd, i_ehdr.e_phoff, SEEK_SET) == -1)
+ {
+ bfd_error = system_call_error;
+ return (NULL);
+ }
+ for (phindex = 0; phindex < i_ehdr.e_phnum; phindex++)
+ {
+ if (bfd_read ((PTR) (x_phdr + phindex), sizeof (*x_phdr), 1, abfd)
+ != sizeof (*x_phdr))
+ {
+ bfd_error = system_call_error;
+ return (NULL);
+ }
+ bfd_swap_phdr_in (abfd, x_phdr + phindex, i_phdr + phindex);
+ }
+
+ /* Once all of the program headers have been read and converted, we
+ can start processing them. */
+
+ for (phindex = 0; phindex < i_ehdr.e_phnum; phindex++)
+ {
+ bfd_section_from_phdr (abfd, i_phdr + phindex, phindex);
+ }
+
+ return (abfd->xvec);
+}
+
static boolean
DEFUN (elf_mkobject, (abfd), bfd *abfd)
{
return (false);
}
-static boolean
-DEFUN (elf_set_section_contents, (abfd, section, location, offset, count),
- bfd *abfd AND
- sec_ptr section AND
- PTR location AND
- file_ptr offset AND
- bfd_size_type count)
-{
- fprintf (stderr, "elf_set_section_contents unimplemented\n");
- fflush (stderr);
- abort ();
- return (false);
-}
-
-#define elf_new_section_hook _bfd_dummy_new_section_hook
-#define elf_core_file_failing_command _bfd_dummy_core_file_failing_command
-#define elf_core_file_failing_signal _bfd_dummy_core_file_failing_signal
-#define elf_core_file_matches_executable_p _bfd_dummy_core_file_matches_executable_p
-#define elf_slurp_armap bfd_false
-#define elf_slurp_extended_name_table _bfd_slurp_extended_name_table
-#define elf_truncate_arname bfd_dont_truncate_arname
-#define elf_openr_next_archived_file bfd_generic_openr_next_archived_file
-#define elf_generic_stat_arch_elt bfd_generic_stat_arch_elt
-#define elf_get_section_contents bfd_generic_get_section_contents
-#define elf_close_and_cleanup bfd_generic_close_and_cleanup
-
-#define elf_bfd_debug_info_start bfd_void
-#define elf_bfd_debug_info_end bfd_void
-#define elf_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
-
-#define elf_write_armap bfd_false
-
-
static unsigned int
elf_get_symtab_upper_bound(abfd)
bfd *abfd;
bfd *ignore_abfd AND
PTR filep AND
asymbol *symbol AND
- bfd_print_symbol_enum_type how)
+ bfd_print_symbol_type how)
{
fprintf (stderr, "elf_print_symbol unimplemented\n");
fflush (stderr);
abort ();
return (0);
}
-
+\f
/* This structure contains everything that BFD knows about a target.
It includes things like its byte order, name, what routines to call
to do various operations, etc. Every BFD points to a target structure
There are two such structures here: one for big-endian machines and
one for little-endian machines. */
+#define elf_core_file_failing_command _bfd_dummy_core_file_failing_command
+#define elf_core_file_failing_signal _bfd_dummy_core_file_failing_signal
+#define elf_core_file_matches_executable_p _bfd_dummy_core_file_matches_executable_p
+
+/* Archives are generic or unimplemented. */
+#define elf_slurp_armap bfd_false
+#define elf_slurp_extended_name_table _bfd_slurp_extended_name_table
+#define elf_truncate_arname bfd_dont_truncate_arname
+#define elf_openr_next_archived_file bfd_generic_openr_next_archived_file
+#define elf_generic_stat_arch_elt bfd_generic_stat_arch_elt
+#define elf_write_armap (PROTO (boolean, (*), \
+ (bfd *arch, unsigned int elength, struct orl *map, int orl_count, \
+ int stridx))) bfd_false
+
+/* Ordinary section reading and writing */
+#define elf_new_section_hook _bfd_dummy_new_section_hook
+#define elf_get_section_contents bfd_generic_get_section_contents
+#define elf_set_section_contents bfd_generic_set_section_contents
+#define elf_close_and_cleanup bfd_generic_close_and_cleanup
+
+#define elf_bfd_debug_info_start bfd_void
+#define elf_bfd_debug_info_end bfd_void
+#define elf_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
+
bfd_target elf_big_vec =
{
/* name: identify kind of target */
"elf-big",
/* flavour: general indication about file */
- bfd_target_elf_flavour_enum,
+ bfd_target_elf_flavour,
/* byteorder_big_p: data is big endian */
true,
_do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16,
/* bfd_check_format: check the format of a file being read */
- { _bfd_dummy_target,
- elf_object_p,
- bfd_generic_archive_p,
- _bfd_dummy_target
+ { _bfd_dummy_target, /* unknown format */
+ elf_object_p, /* assembler/linker output (object file) */
+ bfd_generic_archive_p, /* an archive */
+ elf_core_file_p /* a core file */
},
/* bfd_set_format: set the format of a file being written */
"elf-little",
/* flavour: general indication about file */
- bfd_target_elf_flavour_enum,
+ bfd_target_elf_flavour,
/* byteorder_big_p: data is big endian */
false, /* Nope -- this one's little endian */
_do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16,
/* bfd_check_format: check the format of a file being read */
- { _bfd_dummy_target,
- elf_object_p,
- bfd_generic_archive_p,
- _bfd_dummy_target
+ { _bfd_dummy_target, /* unknown format */
+ elf_object_p, /* assembler/linker output (object file) */
+ bfd_generic_archive_p, /* an archive */
+ elf_core_file_p /* a core file */
},
/* bfd_set_format: set the format of a file being written */
projects / binutils-gdb.git / commitdiff