| /* Internal format of XCOFF object file data structures for BFD. |
| |
| Copyright 1995, 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. |
| Written by Ian Lance Taylor <ian@cygnus.com>, 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| #ifndef _INTERNAL_XCOFF_H |
| #define _INTERNAL_XCOFF_H |
| |
| /* |
| * LINKER |
| */ |
| |
| /* |
| * names of "special" sections |
| */ |
| #define _TEXT ".text" |
| #define _DATA ".data" |
| #define _BSS ".bss" |
| #define _PAD ".pad" |
| #define _LOADER ".loader" |
| |
| /* XCOFF uses a special .loader section with type STYP_LOADER. */ |
| #define STYP_LOADER 0x1000 |
| |
| /* XCOFF uses a special .debug section with type STYP_DEBUG. */ |
| #define STYP_DEBUG 0x2000 |
| |
| /* XCOFF handles line number or relocation overflow by creating |
| another section header with STYP_OVRFLO set. */ |
| #define STYP_OVRFLO 0x8000 |
| |
| #define RS6K_AOUTHDR_OMAGIC 0x0107 /* old: text & data writeable */ |
| #define RS6K_AOUTHDR_NMAGIC 0x0108 /* new: text r/o, data r/w */ |
| #define RS6K_AOUTHDR_ZMAGIC 0x010B /* paged: text r/o, both page-aligned */ |
| |
| |
| /* XCOFF relocation types. |
| The relocations are described in the function |
| xcoff[64]_ppc_relocate_section in coff64-rs6000.c and coff-rs6000.c */ |
| |
| #define R_POS (0x00) |
| #define R_NEG (0x01) |
| #define R_REL (0x02) |
| #define R_TOC (0x03) |
| #define R_RTB (0x04) |
| #define R_GL (0x05) |
| #define R_TCL (0x06) |
| #define R_BA (0x08) |
| #define R_BR (0x0a) |
| #define R_RL (0x0c) |
| #define R_RLA (0x0d) |
| #define R_REF (0x0f) |
| #define R_TRL (0x12) |
| #define R_TRLA (0x13) |
| #define R_RRTBI (0x14) |
| #define R_RRTBA (0x15) |
| #define R_CAI (0x16) |
| #define R_CREL (0x17) |
| #define R_RBA (0x18) |
| #define R_RBAC (0x19) |
| #define R_RBR (0x1a) |
| #define R_RBRC (0x1b) |
| |
| |
| /* |
| * Storage class #defines, from /usr/include/storclass.h |
| * That are not already defined in internal.h |
| */ |
| #define C_INFO 110 /* Comment string in .info section */ |
| |
| |
| /* |
| * AUXILLARY SYMBOL ENTRIES |
| * |
| * auxemt |
| */ |
| |
| /* x_smtyp values: */ |
| |
| #define SMTYP_ALIGN(x) ((x) >> 3) /* log2 of alignment */ |
| #define SMTYP_SMTYP(x) ((x) & 0x7) /* symbol type */ |
| /* Symbol type values: */ |
| #define XTY_ER 0 /* External reference */ |
| #define XTY_SD 1 /* Csect definition */ |
| #define XTY_LD 2 /* Label definition */ |
| #define XTY_CM 3 /* .BSS */ |
| #define XTY_EM 4 /* Error message */ |
| #define XTY_US 5 /* "Reserved for internal use" */ |
| |
| /* x_smclas values: */ |
| |
| #define XMC_PR 0 /* Read-only program code */ |
| #define XMC_RO 1 /* Read-only constant */ |
| #define XMC_DB 2 /* Read-only debug dictionary table */ |
| #define XMC_TC 3 /* Read-write general TOC entry */ |
| #define XMC_UA 4 /* Read-write unclassified */ |
| #define XMC_RW 5 /* Read-write data */ |
| #define XMC_GL 6 /* Read-only global linkage */ |
| #define XMC_XO 7 /* Read-only extended operation */ |
| #define XMC_SV 8 /* Read-only supervisor call */ |
| #define XMC_BS 9 /* Read-write BSS */ |
| #define XMC_DS 10 /* Read-write descriptor csect */ |
| #define XMC_UC 11 /* Read-write unnamed Fortran common */ |
| #define XMC_TI 12 /* Read-only traceback index csect */ |
| #define XMC_TB 13 /* Read-only traceback table csect */ |
| /* 14 ??? */ |
| #define XMC_TC0 15 /* Read-write TOC anchor */ |
| #define XMC_TD 16 /* Read-write data in TOC */ |
| |
| /* The ldhdr structure. This appears at the start of the .loader |
| section. */ |
| |
| struct internal_ldhdr |
| { |
| /* |
| * The version number: |
| * 1 : 32 bit |
| * 2 : 64 bit |
| */ |
| unsigned long l_version; |
| /* The number of symbol table entries. */ |
| bfd_size_type l_nsyms; |
| /* The number of relocation table entries. */ |
| bfd_size_type l_nreloc; |
| /* The length of the import file string table. */ |
| bfd_size_type l_istlen; |
| /* The number of import files. */ |
| bfd_size_type l_nimpid; |
| /* The offset from the start of the .loader section to the first |
| entry in the import file table. */ |
| bfd_size_type l_impoff; |
| /* The length of the string table. */ |
| bfd_size_type l_stlen; |
| /* The offset from the start of the .loader section to the first |
| entry in the string table. */ |
| bfd_size_type l_stoff; |
| /* The offset to start of the symbol table, only in XCOFF64 */ |
| bfd_vma l_symoff; |
| /* The offset to the start of the relocation table, only in XCOFF64 */ |
| bfd_vma l_rldoff; |
| }; |
| |
| /* The ldsym structure. This is used to represent a symbol in the |
| .loader section. */ |
| |
| struct internal_ldsym |
| { |
| union |
| { |
| /* The symbol name if <= SYMNMLEN characters. */ |
| char _l_name[SYMNMLEN]; |
| struct |
| { |
| /* Zero if the symbol name is more than SYMNMLEN characters. */ |
| long _l_zeroes; |
| /* The offset in the string table if the symbol name is more |
| than SYMNMLEN characters. */ |
| long _l_offset; |
| } _l_l; |
| } _l; |
| /* The symbol value. */ |
| bfd_vma l_value; |
| /* The symbol section number. */ |
| short l_scnum; |
| /* The symbol type and flags. */ |
| char l_smtype; |
| /* The symbol storage class. */ |
| char l_smclas; |
| /* The import file ID. */ |
| bfd_size_type l_ifile; |
| /* Offset to the parameter type check string. */ |
| bfd_size_type l_parm; |
| }; |
| |
| /* These flags are for the l_smtype field (the lower three bits are an |
| XTY_* value). */ |
| |
| /* Imported symbol. */ |
| #define L_IMPORT (0x40) |
| /* Entry point. */ |
| #define L_ENTRY (0x20) |
| /* Exported symbol. */ |
| #define L_EXPORT (0x10) |
| |
| /* The ldrel structure. This is used to represent a reloc in the |
| .loader section. */ |
| |
| struct internal_ldrel |
| { |
| /* The reloc address. */ |
| bfd_vma l_vaddr; |
| /* The symbol table index in the .loader section symbol table. */ |
| bfd_size_type l_symndx; |
| /* The relocation type and size. */ |
| short l_rtype; |
| /* The section number this relocation applies to. */ |
| short l_rsecnm; |
| }; |
| |
| /* An entry in the XCOFF linker hash table. */ |
| struct xcoff_link_hash_entry |
| { |
| struct bfd_link_hash_entry root; |
| |
| /* Symbol index in output file. Set to -1 initially. Set to -2 if |
| there is a reloc against this symbol. */ |
| long indx; |
| |
| /* If we have created a TOC entry for this symbol, this is the .tc |
| section which holds it. */ |
| asection *toc_section; |
| |
| union |
| { |
| /* If we have created a TOC entry (the XCOFF_SET_TOC flag is |
| set), this is the offset in toc_section. */ |
| bfd_vma toc_offset; |
| /* If the TOC entry comes from an input file, this is set to the |
| symbol index of the C_HIDEXT XMC_TC or XMC_TD symbol. */ |
| long toc_indx; |
| } u; |
| |
| /* If this symbol is a function entry point which is called, this |
| field holds a pointer to the function descriptor. If this symbol |
| is a function descriptor, this field holds a pointer to the |
| function entry point. */ |
| struct xcoff_link_hash_entry *descriptor; |
| |
| /* The .loader symbol table entry, if there is one. */ |
| struct internal_ldsym *ldsym; |
| |
| /* If XCOFF_BUILT_LDSYM is set, this is the .loader symbol table |
| index. If XCOFF_BUILD_LDSYM is clear, and XCOFF_IMPORT is set, |
| this is the l_ifile value. */ |
| long ldindx; |
| |
| /* Some linker flags. */ |
| unsigned long flags; |
| |
| /* The storage mapping class. */ |
| unsigned char smclas; |
| }; |
| |
| /* |
| * #define for xcoff_link_hash_entry.flags |
| * |
| * XCOFF_REF_REGULAR |
| * Symbol is referenced by a regular object. |
| * |
| * XCOFF_DEF_REGULAR |
| * Symbol is defined by a regular object. |
| * |
| * XCOFF_DEF_DYNAMIC |
| * Symbol is defined by a dynamic object. |
| * |
| * XCOFF_LDREL |
| * Symbol is used in a reloc being copied into the .loader section. |
| * |
| * XCOFF_ENTRY |
| * Symbol is the entry point. |
| * |
| * XCOFF_CALLED |
| * Symbol is called; this is, it appears in a R_BR reloc. |
| * |
| * XCOFF_SET_TOC |
| * Symbol needs the TOC entry filled in. |
| * |
| * XCOFF_IMPORT |
| * Symbol is explicitly imported. |
| * |
| * XCOFF_EXPORT |
| * Symbol is explicitly exported. |
| * |
| * XCOFF_BUILT_LDSYM |
| * Symbol has been processed by xcoff_build_ldsyms. |
| * |
| * XCOFF_MARK |
| * Symbol is mentioned by a section which was not garbage collected. |
| * |
| * XCOFF_HAS_SIZE |
| * Symbol size is recorded in size_list list from hash table. |
| * |
| * XCOFF_DESCRIPTOR |
| * Symbol is a function descriptor. |
| * |
| * XCOFF_MULTIPLY_DEFINED |
| * Multiple definitions have been for the symbol. |
| * |
| * XCOFF_RTINIT |
| * Symbol is the __rtinit symbol |
| * |
| */ |
| |
| #define XCOFF_REF_REGULAR 0x00000001 |
| #define XCOFF_DEF_REGULAR 0x00000002 |
| #define XCOFF_DEF_DYNAMIC 0x00000004 |
| #define XCOFF_LDREL 0x00000008 |
| #define XCOFF_ENTRY 0x00000010 |
| #define XCOFF_CALLED 0x00000020 |
| #define XCOFF_SET_TOC 0x00000040 |
| #define XCOFF_IMPORT 0x00000080 |
| #define XCOFF_EXPORT 0x00000100 |
| #define XCOFF_BUILT_LDSYM 0x00000200 |
| #define XCOFF_MARK 0x00000400 |
| #define XCOFF_HAS_SIZE 0x00000800 |
| #define XCOFF_DESCRIPTOR 0x00001000 |
| #define XCOFF_MULTIPLY_DEFINED 0x00002000 |
| #define XCOFF_RTINIT 0x00004000 |
| |
| |
| /* The XCOFF linker hash table. */ |
| |
| #define XCOFF_NUMBER_OF_SPECIAL_SECTIONS 6 |
| #define XCOFF_SPECIAL_SECTION_TEXT 0 |
| #define XCOFF_SPECIAL_SECTION_ETEXT 1 |
| #define XCOFF_SPECIAL_SECTION_DATA 2 |
| #define XCOFF_SPECIAL_SECTION_EDATA 3 |
| #define XCOFF_SPECIAL_SECTION_END 4 |
| #define XCOFF_SPECIAL_SECTION_END2 5 |
| |
| struct xcoff_link_hash_table |
| { |
| struct bfd_link_hash_table root; |
| |
| /* The .debug string hash table. We need to compute this while |
| reading the input files, so that we know how large the .debug |
| section will be before we assign section positions. */ |
| struct bfd_strtab_hash *debug_strtab; |
| |
| /* The .debug section we will use for the final output. */ |
| asection *debug_section; |
| |
| /* The .loader section we will use for the final output. */ |
| asection *loader_section; |
| |
| /* A count of non TOC relative relocs which will need to be |
| allocated in the .loader section. */ |
| size_t ldrel_count; |
| |
| /* The .loader section header. */ |
| struct internal_ldhdr ldhdr; |
| |
| /* The .gl section we use to hold global linkage code. */ |
| asection *linkage_section; |
| |
| /* The .tc section we use to hold toc entries we build for global |
| linkage code. */ |
| asection *toc_section; |
| |
| /* The .ds section we use to hold function descriptors which we |
| create for exported symbols. */ |
| asection *descriptor_section; |
| |
| /* The list of import files. */ |
| struct xcoff_import_file *imports; |
| |
| /* Required alignment of sections within the output file. */ |
| unsigned long file_align; |
| |
| /* Whether the .text section must be read-only. */ |
| boolean textro; |
| |
| /* Whether garbage collection was done. */ |
| boolean gc; |
| |
| /* A linked list of symbols for which we have size information. */ |
| struct xcoff_link_size_list |
| { |
| struct xcoff_link_size_list *next; |
| struct xcoff_link_hash_entry *h; |
| bfd_size_type size; |
| } *size_list; |
| |
| /* Magic sections: _text, _etext, _data, _edata, _end, end. */ |
| asection *special_sections[XCOFF_NUMBER_OF_SPECIAL_SECTIONS]; |
| }; |
| |
| |
| /* This structure is used to pass information through |
| xcoff_link_hash_traverse. */ |
| |
| struct xcoff_loader_info |
| { |
| /* Set if a problem occurred. */ |
| boolean failed; |
| /* Output BFD. */ |
| bfd *output_bfd; |
| /* Link information structure. */ |
| struct bfd_link_info *info; |
| /* Whether all defined symbols should be exported. */ |
| boolean export_defineds; |
| /* Number of ldsym structures. */ |
| size_t ldsym_count; |
| /* Size of string table. */ |
| size_t string_size; |
| /* String table. */ |
| bfd_byte *strings; |
| /* Allocated size of string table. */ |
| size_t string_alc; |
| }; |
| |
| /* In case we're on a 32-bit machine, construct a 64-bit "-1" value |
| from smaller values. Start with zero, widen, *then* decrement. */ |
| #define MINUS_ONE (((bfd_vma)0) - 1) |
| |
| |
| /* |
| * __rtinit |
| * from /usr/include/rtinit.h |
| */ |
| struct __rtinit { |
| int (*rtl)(); /* Pointer to runtime linker */ |
| int init_offset; /* Offset to array of init functions |
| (0 if none). */ |
| int fini_offset; /* Offset to array of fini functions |
| (0 if none). */ |
| int __rtinit_descriptor_size; /* Size of __RTINIT_DESCRIPTOR. |
| This value should be used instead |
| of sizeof(__RTINIT_DESCRIPTOR). */ |
| }; |
| |
| #define RTINIT_DESCRIPTOR_SIZE (12) |
| |
| struct __rtinit_descriptor { |
| int f; /* Init/fini function. */ |
| int name_offset; /* Offset (within __rtinit symbol) |
| to name of function. */ |
| unsigned char flags; /* Flags */ |
| }; |
| |
| |
| |
| /* |
| * ARCHIVE |
| */ |
| |
| #define XCOFFARMAG "<aiaff>\012" |
| #define XCOFFARMAGBIG "<bigaf>\012" |
| #define SXCOFFARMAG 8 |
| |
| /* This terminates an XCOFF archive member name. */ |
| |
| #define XCOFFARFMAG "`\012" |
| #define SXCOFFARFMAG 2 |
| |
| /* XCOFF archives start with this (printable) structure. */ |
| |
| struct xcoff_ar_file_hdr |
| { |
| /* Magic string. */ |
| char magic[SXCOFFARMAG]; |
| |
| /* Offset of the member table (decimal ASCII string). */ |
| char memoff[12]; |
| |
| /* Offset of the global symbol table (decimal ASCII string). */ |
| char symoff[12]; |
| |
| /* Offset of the first member in the archive (decimal ASCII string). */ |
| char firstmemoff[12]; |
| |
| /* Offset of the last member in the archive (decimal ASCII string). */ |
| char lastmemoff[12]; |
| |
| /* Offset of the first member on the free list (decimal ASCII |
| string). */ |
| char freeoff[12]; |
| }; |
| |
| #define SIZEOF_AR_FILE_HDR (5 * 12 + SXCOFFARMAG) |
| |
| /* This is the equivalent data structure for the big archive format. */ |
| |
| struct xcoff_ar_file_hdr_big |
| { |
| /* Magic string. */ |
| char magic[SXCOFFARMAG]; |
| |
| /* Offset of the member table (decimal ASCII string). */ |
| char memoff[20]; |
| |
| /* Offset of the global symbol table for 32-bit objects (decimal ASCII |
| string). */ |
| char symoff[20]; |
| |
| /* Offset of the global symbol table for 64-bit objects (decimal ASCII |
| string). */ |
| char symoff64[20]; |
| |
| /* Offset of the first member in the archive (decimal ASCII string). */ |
| char firstmemoff[20]; |
| |
| /* Offset of the last member in the archive (decimal ASCII string). */ |
| char lastmemoff[20]; |
| |
| /* Offset of the first member on the free list (decimal ASCII |
| string). */ |
| char freeoff[20]; |
| }; |
| |
| #define SIZEOF_AR_FILE_HDR_BIG (6 * 20 + SXCOFFARMAG) |
| |
| |
| /* Each XCOFF archive member starts with this (printable) structure. */ |
| |
| struct xcoff_ar_hdr |
| { |
| /* File size not including the header (decimal ASCII string). */ |
| char size[12]; |
| |
| /* File offset of next archive member (decimal ASCII string). */ |
| char nextoff[12]; |
| |
| /* File offset of previous archive member (decimal ASCII string). */ |
| char prevoff[12]; |
| |
| /* File mtime (decimal ASCII string). */ |
| char date[12]; |
| |
| /* File UID (decimal ASCII string). */ |
| char uid[12]; |
| |
| /* File GID (decimal ASCII string). */ |
| char gid[12]; |
| |
| /* File mode (octal ASCII string). */ |
| char mode[12]; |
| |
| /* Length of file name (decimal ASCII string). */ |
| char namlen[4]; |
| |
| /* This structure is followed by the file name. The length of the |
| name is given in the namlen field. If the length of the name is |
| odd, the name is followed by a null byte. The name and optional |
| null byte are followed by XCOFFARFMAG, which is not included in |
| namlen. The contents of the archive member follow; the number of |
| bytes is given in the size field. */ |
| }; |
| |
| #define SIZEOF_AR_HDR (7 * 12 + 4) |
| |
| /* The equivalent for the big archive format. */ |
| |
| struct xcoff_ar_hdr_big |
| { |
| /* File size not including the header (decimal ASCII string). */ |
| char size[20]; |
| |
| /* File offset of next archive member (decimal ASCII string). */ |
| char nextoff[20]; |
| |
| /* File offset of previous archive member (decimal ASCII string). */ |
| char prevoff[20]; |
| |
| /* File mtime (decimal ASCII string). */ |
| char date[12]; |
| |
| /* File UID (decimal ASCII string). */ |
| char uid[12]; |
| |
| /* File GID (decimal ASCII string). */ |
| char gid[12]; |
| |
| /* File mode (octal ASCII string). */ |
| char mode[12]; |
| |
| /* Length of file name (decimal ASCII string). */ |
| char namlen[4]; |
| |
| /* This structure is followed by the file name. The length of the |
| name is given in the namlen field. If the length of the name is |
| odd, the name is followed by a null byte. The name and optional |
| null byte are followed by XCOFFARFMAG, which is not included in |
| namlen. The contents of the archive member follow; the number of |
| bytes is given in the size field. */ |
| }; |
| |
| #define SIZEOF_AR_HDR_BIG (3 * 20 + 4 * 12 + 4) |
| |
| /* We often have to distinguish between the old and big file format. |
| Make it a bit cleaner. We can use `xcoff_ardata' here because the |
| `hdr' member has the same size and position in both formats. */ |
| #define xcoff_big_format_p(abfd) \ |
| (xcoff_ardata (abfd)->magic[1] == 'b') |
| |
| /* We store a copy of the xcoff_ar_file_hdr in the tdata field of the |
| artdata structure. Similar for the big archive. */ |
| #define xcoff_ardata(abfd) \ |
| ((struct xcoff_ar_file_hdr *) bfd_ardata (abfd)->tdata) |
| #define xcoff_ardata_big(abfd) \ |
| ((struct xcoff_ar_file_hdr_big *) bfd_ardata (abfd)->tdata) |
| |
| /* We store a copy of the xcoff_ar_hdr in the arelt_data field of an |
| archive element. Similar for the big archive. */ |
| #define arch_eltdata(bfd) ((struct areltdata *) ((bfd)->arelt_data)) |
| #define arch_xhdr(bfd) \ |
| ((struct xcoff_ar_hdr *) arch_eltdata (bfd)->arch_header) |
| #define arch_xhdr_big(bfd) \ |
| ((struct xcoff_ar_hdr_big *) arch_eltdata (bfd)->arch_header) |
| |
| #endif /* _INTERNAL_XCOFF_H */ |