| /* BFD back-end data structures for NLM (NetWare Loadable Modules) files. |
| Copyright 1993, 1994, 2001, 2002, 2003, 2005 Free Software Foundation, Inc. |
| Written by Cygnus Support. |
| |
| 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| |
| #ifndef _LIBNLM_H_ |
| #define _LIBNLM_H_ 1 |
| |
| #ifdef ARCH_SIZE |
| # define NLM_ARCH_SIZE ARCH_SIZE |
| #endif |
| #include "nlm/common.h" |
| #include "nlm/internal.h" |
| #include "nlm/external.h" |
| |
| /* A reloc for an imported NLM symbol. Normal relocs are associated |
| with sections, and include a symbol. These relocs are associated |
| with (undefined) symbols, and include a section. */ |
| |
| struct nlm_relent |
| { |
| /* Section of reloc. */ |
| asection *section; |
| /* Reloc info (sym_ptr_ptr field set only when canonicalized). */ |
| arelent reloc; |
| }; |
| |
| /* Information we keep for an NLM symbol. */ |
| |
| typedef struct |
| { |
| /* BFD symbol. */ |
| asymbol symbol; |
| /* Number of reloc entries for imported symbol. */ |
| bfd_size_type rcnt; |
| /* Array of reloc information for imported symbol. */ |
| struct nlm_relent *relocs; |
| } nlmNAME(symbol_type); |
| |
| extern bfd_boolean nlm_mkobject (bfd *); |
| extern bfd_boolean nlm_set_arch_mach (bfd *, enum bfd_architecture, unsigned long); |
| extern void nlmNAME (get_symbol_info) (bfd *, asymbol *, symbol_info *); |
| extern long nlmNAME (get_symtab_upper_bound)(bfd *); |
| extern long nlmNAME (canonicalize_symtab) (bfd *, asymbol **); |
| extern asymbol * nlmNAME (make_empty_symbol) (bfd *); |
| extern void nlmNAME (print_symbol) (bfd *, void *, asymbol *, bfd_print_symbol_type); |
| extern long nlmNAME (get_reloc_upper_bound) (bfd *, asection *); |
| extern long nlmNAME (canonicalize_reloc) (bfd *, asection *, arelent **, asymbol **); |
| extern const bfd_target * nlmNAME (object_p) (bfd *); |
| extern bfd_boolean nlmNAME (set_arch_mach) (bfd *, enum bfd_architecture, unsigned long); |
| extern bfd_boolean nlmNAME (set_section_contents) (bfd *, asection *, const void *, file_ptr, bfd_size_type); |
| extern bfd_boolean nlmNAME (write_object_contents) (bfd *); |
| |
| /* Some private data is stashed away for future use using the tdata pointer |
| in the bfd structure. */ |
| |
| struct nlm_obj_tdata |
| { |
| /* Actual data, but ref like ptr */ |
| Nlm_Internal_Fixed_Header nlm_fixed_hdr[1]; |
| Nlm_Internal_Variable_Header nlm_variable_hdr[1]; |
| Nlm_Internal_Version_Header nlm_version_hdr[1]; |
| Nlm_Internal_Copyright_Header nlm_copyright_hdr[1]; |
| Nlm_Internal_Extended_Header nlm_extended_hdr[1]; |
| Nlm_Internal_Custom_Header nlm_custom_hdr[1]; |
| Nlm_Internal_Cygnus_Ext_Header nlm_cygnus_ext_hdr[1]; |
| /* BFD NLM symbols. */ |
| nlmNAME (symbol_type) * nlm_symbols; |
| /* Lowest text and data VMA values. */ |
| bfd_vma nlm_text_low; |
| bfd_vma nlm_data_low; |
| /* Caches for data read from object file. */ |
| arelent * nlm_reloc_fixups; |
| asection ** nlm_reloc_fixup_secs; |
| /* Backend specific information. This should probably be a pointer, |
| but that would require yet another entry point to initialize the |
| structure. */ |
| union |
| { |
| struct /* Alpha backend information. */ |
| { |
| bfd_vma gp; /* GP value. */ |
| bfd_vma lita_address; /* .lita section address. */ |
| bfd_size_type lita_size; /* .lita section size. */ |
| } |
| alpha_backend_data; |
| } |
| backend_data; |
| }; |
| |
| #define nlm_tdata(bfd) ((bfd) -> tdata.nlm_obj_data) |
| #define nlm_fixed_header(bfd) (nlm_tdata (bfd) -> nlm_fixed_hdr) |
| #define nlm_variable_header(bfd) (nlm_tdata (bfd) -> nlm_variable_hdr) |
| #define nlm_version_header(bfd) (nlm_tdata (bfd) -> nlm_version_hdr) |
| #define nlm_copyright_header(bfd) (nlm_tdata (bfd) -> nlm_copyright_hdr) |
| #define nlm_extended_header(bfd) (nlm_tdata (bfd) -> nlm_extended_hdr) |
| #define nlm_custom_header(bfd) (nlm_tdata (bfd) -> nlm_custom_hdr) |
| #define nlm_cygnus_ext_header(bfd) (nlm_tdata (bfd) -> nlm_cygnus_ext_hdr) |
| #define nlm_get_symbols(bfd) (nlm_tdata (bfd) -> nlm_symbols) |
| #define nlm_set_symbols(bfd, p) (nlm_tdata (bfd) -> nlm_symbols = (p)) |
| #define nlm_set_text_low(bfd, i) (nlm_tdata (bfd) -> nlm_text_low = (i)) |
| #define nlm_get_text_low(bfd) (nlm_tdata (bfd) -> nlm_text_low) |
| #define nlm_set_data_low(bfd, i) (nlm_tdata (bfd) -> nlm_data_low = (i)) |
| #define nlm_get_data_low(bfd) (nlm_tdata (bfd) -> nlm_data_low) |
| #define nlm_relocation_fixups(bfd) (nlm_tdata (bfd) -> nlm_reloc_fixups) |
| #define nlm_relocation_fixup_secs(bfd) (nlm_tdata (bfd) -> nlm_reloc_fixup_secs) |
| #define nlm_alpha_backend_data(bfd) (&nlm_tdata (bfd) -> backend_data.alpha_backend_data) |
| |
| /* This is used when writing out the external relocs. */ |
| |
| struct reloc_and_sec |
| { |
| arelent *rel; |
| asection *sec; |
| }; |
| |
| /* We store some function pointer in the backend structure. This lets |
| different NLM targets share most of the same code, while providing |
| slightly different code where necessary. */ |
| |
| struct nlm_backend_data |
| { |
| /* Signature for this backend. */ |
| char signature[NLM_SIGNATURE_SIZE]; |
| /* Size of the fixed header. */ |
| bfd_size_type fixed_header_size; |
| /* Size of optional prefix for this backend. Some backend may |
| require this to be a function, but so far a constant is OK. This |
| is for a prefix which precedes the standard NLM fixed header. */ |
| bfd_size_type optional_prefix_size; |
| /* Architecture. */ |
| enum bfd_architecture arch; |
| /* Machine. */ |
| unsigned int mach; |
| /* Some NLM formats do not use the uninitialized data section, so |
| all uninitialized data must be put into the regular data section |
| instead. */ |
| bfd_boolean no_uninitialized_data; |
| /* Some NLM formats have a prefix on the file. If this function is |
| not NULL, it will be called by nlm_object_p. It should return |
| TRUE if this file could match this format, and it should leave |
| the BFD such that a bfd_bread will pick up the fixed header. */ |
| bfd_boolean (*nlm_backend_object_p) (bfd *); |
| /* Write out the prefix. This function may be NULL. This must |
| write out the same number of bytes as is in the field |
| optional_prefix_size. */ |
| bfd_boolean (*nlm_write_prefix) (bfd *); |
| /* Read a relocation fixup from abfd. The reloc information is |
| machine specific. The second argument is the symbol if this is |
| an import, or NULL if this is a reloc fixup. This function |
| should set the third argument to the section which the reloc |
| belongs in, and the fourth argument to the reloc itself; it does |
| not need to fill in the sym_ptr_ptr field for a reloc against an |
| import symbol. */ |
| bfd_boolean (*nlm_read_reloc) (bfd *, nlmNAME (symbol_type) *, asection **, arelent *); |
| /* To make objcopy to an i386 NLM work, the i386 backend needs a |
| chance to work over the relocs. This is a bit icky. */ |
| bfd_boolean (*nlm_mangle_relocs) (bfd *, asection *, const void *, bfd_vma, bfd_size_type); |
| /* Read an import record from abfd. It would be nice if this |
| were in a machine-dependent format, but it doesn't seem to be. */ |
| bfd_boolean (*nlm_read_import) (bfd *, nlmNAME (symbol_type) *); |
| /* Write an import record to abfd. */ |
| bfd_boolean (*nlm_write_import) (bfd *, asection *, arelent *); |
| /* Set the section for a public symbol. This may be NULL, in which |
| case a default method will be used. */ |
| bfd_boolean (*nlm_set_public_section) (bfd *, nlmNAME (symbol_type) *); |
| /* Get the offset to write out for a public symbol. This may be |
| NULL, in which case a default method will be used. */ |
| bfd_vma (*nlm_get_public_offset) (bfd *, asymbol *); |
| /* Swap the fixed header in and out */ |
| void (*nlm_swap_fhdr_in) (bfd *, void *, Nlm_Internal_Fixed_Header *); |
| void (*nlm_swap_fhdr_out) (bfd *, struct nlm_internal_fixed_header *, void *); |
| /* Write out an external reference. */ |
| bfd_boolean (*nlm_write_external) (bfd *, bfd_size_type, asymbol *, struct reloc_and_sec *); |
| bfd_boolean (*nlm_write_export) (bfd *, asymbol *, bfd_vma); |
| }; |
| |
| #define nlm_backend(bfd) ((struct nlm_backend_data *)((bfd) -> xvec -> backend_data)) |
| #define nlm_signature(bfd) (nlm_backend (bfd) -> signature) |
| #define nlm_fixed_header_size(bfd) (nlm_backend (bfd) -> fixed_header_size) |
| #define nlm_optional_prefix_size(bfd) (nlm_backend (bfd) -> optional_prefix_size) |
| #define nlm_architecture(bfd) (nlm_backend (bfd) -> arch) |
| #define nlm_machine(bfd) (nlm_backend (bfd) -> mach) |
| #define nlm_no_uninitialized_data(bfd) (nlm_backend (bfd) -> no_uninitialized_data) |
| #define nlm_backend_object_p_func(bfd) (nlm_backend (bfd) -> nlm_backend_object_p) |
| #define nlm_write_prefix_func(bfd) (nlm_backend (bfd) -> nlm_write_prefix) |
| #define nlm_read_reloc_func(bfd) (nlm_backend (bfd) -> nlm_read_reloc) |
| #define nlm_mangle_relocs_func(bfd) (nlm_backend (bfd) -> nlm_mangle_relocs) |
| #define nlm_read_import_func(bfd) (nlm_backend (bfd) -> nlm_read_import) |
| #define nlm_write_import_func(bfd) (nlm_backend (bfd) -> nlm_write_import) |
| #define nlm_set_public_section_func(bfd) (nlm_backend (bfd) -> nlm_set_public_section) |
| #define nlm_get_public_offset_func(bfd) (nlm_backend (bfd) -> nlm_get_public_offset) |
| #define nlm_swap_fixed_header_in_func(bfd) (nlm_backend (bfd) -> nlm_swap_fhdr_in) |
| #define nlm_swap_fixed_header_out_func(bfd)(nlm_backend (bfd) -> nlm_swap_fhdr_out) |
| #define nlm_write_external_func(bfd) (nlm_backend (bfd) -> nlm_write_external) |
| #define nlm_write_export_func(bfd) (nlm_backend (bfd) -> nlm_write_export) |
| |
| /* The NLM code, data, and uninitialized sections have no names defined |
| in the NLM, but bfd wants to give them names, so use the traditional |
| UNIX names. */ |
| |
| #define NLM_CODE_NAME ".text" |
| #define NLM_INITIALIZED_DATA_NAME ".data" |
| #define NLM_UNINITIALIZED_DATA_NAME ".bss" |
| |
| #endif /* _LIBNLM_H_ */ |