+#endif /* ARCH_SIZE==32 */
+#endif /* ARCH_SIZE==64 */
+
+/* Declare at file level, since used in parameter lists, which have
+ weird scope. */
+struct external_exec;
+struct external_nlist;
+struct reloc_ext_external;
+struct reloc_std_external;
+\f
+/* a.out backend linker hash table entries. */
+
+struct aout_link_hash_entry
+{
+ struct bfd_link_hash_entry root;
+ /* Whether this symbol has been written out. */
+ bfd_boolean written;
+ /* Symbol index in output file. */
+ int indx;
+};
+
+/* a.out backend linker hash table. */
+
+struct aout_link_hash_table
+{
+ struct bfd_link_hash_table root;
+};
+
+/* Look up an entry in an a.out link hash table. */
+
+#define aout_link_hash_lookup(table, string, create, copy, follow) \
+ ((struct aout_link_hash_entry *) \
+ bfd_link_hash_lookup (&(table)->root, (string), (create), (copy), (follow)))
+
+/* Traverse an a.out link hash table. */
+
+#define aout_link_hash_traverse(table, func, info) \
+ (bfd_link_hash_traverse \
+ (&(table)->root, \
+ (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
+ (info)))
+
+/* Get the a.out link hash table from the info structure. This is
+ just a cast. */
+
+#define aout_hash_table(p) ((struct aout_link_hash_table *) ((p)->hash))
+\f
+/* Back-end information for various a.out targets. */
+struct aout_backend_data
+{
+ /* Are ZMAGIC files mapped contiguously? If so, the text section may
+ need more padding, if the segment size (granularity for memory access
+ control) is larger than the page size. */
+ unsigned char zmagic_mapped_contiguous;
+ /* If this flag is set, ZMAGIC/NMAGIC file headers get mapped in with the
+ text section, which starts immediately after the file header.
+ If not, the text section starts on the next page. */
+ unsigned char text_includes_header;
+
+ /* If this flag is set, then if the entry address is not in the
+ first SEGMENT_SIZE bytes of the text section, it is taken to be
+ the address of the start of the text section. This can be useful
+ for kernels. */
+ unsigned char entry_is_text_address;
+
+ /* The value to pass to N_SET_FLAGS. */
+ unsigned char exec_hdr_flags;
+
+ /* If the text section VMA isn't specified, and we need an absolute
+ address, use this as the default. If we're producing a relocatable
+ file, zero is always used. */
+ /* ?? Perhaps a callback would be a better choice? Will this do anything
+ reasonable for a format that handles multiple CPUs with different
+ load addresses for each? */
+ bfd_vma default_text_vma;
+
+ /* Callback for setting the page and segment sizes, if they can't be
+ trivially determined from the architecture. */
+ bfd_boolean (*set_sizes) (bfd *);
+
+ /* zmagic files only. For go32, the length of the exec header contributes
+ to the size of the text section in the file for alignment purposes but
+ does *not* get counted in the length of the text section. */
+ unsigned char exec_header_not_counted;
+
+ /* Callback from the add symbols phase of the linker code to handle
+ a dynamic object. */
+ bfd_boolean (*add_dynamic_symbols)
+ (bfd *, struct bfd_link_info *, struct external_nlist **,
+ bfd_size_type *, char **);
+
+ /* Callback from the add symbols phase of the linker code to handle
+ adding a single symbol to the global linker hash table. */
+ bfd_boolean (*add_one_symbol)
+ (struct bfd_link_info *, bfd *, const char *, flagword,
+ asection *, bfd_vma, const char *, bfd_boolean, bfd_boolean,
+ struct bfd_link_hash_entry **);
+
+ /* Called to handle linking a dynamic object. */
+ bfd_boolean (*link_dynamic_object)
+ (struct bfd_link_info *, bfd *);
+
+ /* Called for each global symbol being written out by the linker.
+ This should write out the dynamic symbol information. */
+ bfd_boolean (*write_dynamic_symbol)
+ (bfd *, struct bfd_link_info *, struct aout_link_hash_entry *);
+
+ /* If this callback is not NULL, the linker calls it for each reloc.
+ RELOC is a pointer to the unswapped reloc. If *SKIP is set to
+ TRUE, the reloc will be skipped. *RELOCATION may be changed to
+ change the effects of the relocation. */
+ bfd_boolean (*check_dynamic_reloc)
+ (struct bfd_link_info *info, bfd *input_bfd,
+ asection *input_section, struct aout_link_hash_entry *h,
+ void * reloc, bfd_byte *contents, bfd_boolean *skip,
+ bfd_vma *relocation);
+
+ /* Called at the end of a link to finish up any dynamic linking
+ information. */
+ bfd_boolean (*finish_dynamic_link) (bfd *, struct bfd_link_info *);
+};
+#define aout_backend_info(abfd) \
+ ((const struct aout_backend_data *)((abfd)->xvec->backend_data))
+
+/* This is the layout in memory of a "struct exec" while we process it.
+ All 'lengths' are given as a number of bytes.
+ All 'alignments' are for relinkable files only; an alignment of
+ 'n' indicates the corresponding segment must begin at an
+ address that is a multiple of (2**n). */
+
+struct internal_exec
+{
+ long a_info; /* Magic number and flags, packed. */
+ bfd_vma a_text; /* Length of text, in bytes. */
+ bfd_vma a_data; /* Length of data, in bytes. */
+ bfd_vma a_bss; /* Length of uninitialized data area in mem. */
+ bfd_vma a_syms; /* Length of symbol table data in file. */
+ bfd_vma a_entry; /* Start address. */
+ bfd_vma a_trsize; /* Length of text's relocation info, in bytes. */
+ bfd_vma a_drsize; /* Length of data's relocation info, in bytes. */
+ /* Added for i960 */
+ bfd_vma a_tload; /* Text runtime load address. */
+ bfd_vma a_dload; /* Data runtime load address. */
+ unsigned char a_talign; /* Alignment of text segment. */
+ unsigned char a_dalign; /* Alignment of data segment. */
+ unsigned char a_balign; /* Alignment of bss segment. */
+ char a_relaxable; /* Enough info for linker relax. */
+};
+
+/* Magic number is written
+ < MSB >
+ 3130292827262524232221201918171615141312111009080706050403020100
+ < FLAGS >< MACHINE TYPE >< MAGIC NUMBER > */
+
+/* Magic number for NetBSD is
+ <MSB >
+ 3130292827262524232221201918171615141312111009080706050403020100
+ < FLAGS >< MACHINE TYPE >< MAGIC NUMBER > */
+
+enum machine_type
+{
+ M_UNKNOWN = 0,
+ M_68010 = 1,
+ M_68020 = 2,
+ M_SPARC = 3,
+ /* Skip a bunch so we don't run into any of SUN's numbers. */
+ /* Make these up for the ns32k. */
+ M_NS32032 = (64), /* NS32032 running ? */
+ M_NS32532 = (64 + 5), /* NS32532 running mach. */
+ M_386 = 100,
+ M_29K = 101, /* AMD 29000. */
+ M_386_DYNIX = 102, /* Sequent running dynix. */
+ M_ARM = 103, /* Advanced Risc Machines ARM. */
+ M_SPARCLET = 131, /* SPARClet = M_SPARC + 128. */
+ M_386_NETBSD = 134, /* NetBSD/i386 binary. */
+ M_68K_NETBSD = 135, /* NetBSD/m68k binary. */
+ M_68K4K_NETBSD = 136, /* NetBSD/m68k4k binary. */
+ M_532_NETBSD = 137, /* NetBSD/ns32k binary. */
+ M_SPARC_NETBSD = 138, /* NetBSD/sparc binary. */
+ M_PMAX_NETBSD = 139, /* NetBSD/pmax (MIPS little-endian) binary. */
+ M_VAX_NETBSD = 140, /* NetBSD/vax binary. */
+ M_ALPHA_NETBSD = 141, /* NetBSD/alpha binary. */
+ M_ARM6_NETBSD = 143, /* NetBSD/arm32 binary. */
+ M_SPARCLET_1 = 147, /* 0x93, reserved. */
+ M_POWERPC_NETBSD = 149, /* NetBSD/powerpc (big-endian) binary. */
+ M_VAX4K_NETBSD = 150, /* NetBSD/vax 4K pages binary. */
+ M_MIPS1 = 151, /* MIPS R2000/R3000 binary. */
+ M_MIPS2 = 152, /* MIPS R4000/R6000 binary. */
+ M_88K_OPENBSD = 153, /* OpenBSD/m88k binary. */
+ M_HPPA_OPENBSD = 154, /* OpenBSD/hppa binary. */
+ M_SPARC64_NETBSD = 156, /* NetBSD/sparc64 binary. */
+ M_X86_64_NETBSD = 157, /* NetBSD/amd64 binary. */
+ M_SPARCLET_2 = 163, /* 0xa3, reserved. */
+ M_SPARCLET_3 = 179, /* 0xb3, reserved. */
+ M_SPARCLET_4 = 195, /* 0xc3, reserved. */
+ M_HP200 = 200, /* HP 200 (68010) BSD binary. */
+ M_HP300 = (300 % 256), /* HP 300 (68020+68881) BSD binary. */
+ M_HPUX = (0x20c % 256), /* HP 200/300 HPUX binary. */
+ M_SPARCLET_5 = 211, /* 0xd3, reserved. */
+ M_SPARCLET_6 = 227, /* 0xe3, reserved. */
+/*M_SPARCLET_7 = 243 / * 0xf3, reserved. */
+ M_SPARCLITE_LE = 243,
+ M_CRIS = 255 /* Axis CRIS binary. */
+};
+
+#define N_DYNAMIC(exec) ((exec).a_info & 0x80000000)
+
+#ifndef N_MAGIC
+# define N_MAGIC(exec) ((exec).a_info & 0xffff)