640 lines
19 KiB
C
640 lines
19 KiB
C
/* Internal format of XCOFF object file data structures for BFD.
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Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
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Free Software Foundation, Inc.
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Written by Ian Lance Taylor <ian@cygnus.com>, Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#ifndef _INTERNAL_XCOFF_H
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#define _INTERNAL_XCOFF_H
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/* Linker */
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/* Names of "special" sections. */
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#define _TEXT ".text"
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#define _DATA ".data"
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#define _BSS ".bss"
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#define _PAD ".pad"
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#define _LOADER ".loader"
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#define _EXCEPT ".except"
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#define _TYPCHK ".typchk"
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/* XCOFF uses a special .loader section with type STYP_LOADER. */
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#define STYP_LOADER 0x1000
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/* XCOFF uses a special .debug section with type STYP_DEBUG. */
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#define STYP_DEBUG 0x2000
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/* XCOFF handles line number or relocation overflow by creating
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another section header with STYP_OVRFLO set. */
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#define STYP_OVRFLO 0x8000
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/* Specifies an exception section. A section of this type provides
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information to identify the reason that a trap or ececptin occured within
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and executable object program */
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#define STYP_EXCEPT 0x0100
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/* Specifies a type check section. A section of this type contains parameter
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argument type check strings used by the AIX binder. */
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#define STYP_TYPCHK 0x4000
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#define RS6K_AOUTHDR_OMAGIC 0x0107 /* old: text & data writeable */
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#define RS6K_AOUTHDR_NMAGIC 0x0108 /* new: text r/o, data r/w */
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#define RS6K_AOUTHDR_ZMAGIC 0x010B /* paged: text r/o, both page-aligned */
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/* XCOFF relocation types.
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The relocations are described in the function
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xcoff[64]_ppc_relocate_section in coff64-rs6000.c and coff-rs6000.c */
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#define R_POS (0x00)
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#define R_NEG (0x01)
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#define R_REL (0x02)
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#define R_TOC (0x03)
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#define R_RTB (0x04)
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#define R_GL (0x05)
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#define R_TCL (0x06)
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#define R_BA (0x08)
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#define R_BR (0x0a)
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#define R_RL (0x0c)
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#define R_RLA (0x0d)
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#define R_REF (0x0f)
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#define R_TRL (0x12)
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#define R_TRLA (0x13)
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#define R_RRTBI (0x14)
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#define R_RRTBA (0x15)
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#define R_CAI (0x16)
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#define R_CREL (0x17)
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#define R_RBA (0x18)
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#define R_RBAC (0x19)
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#define R_RBR (0x1a)
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#define R_RBRC (0x1b)
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/* Storage class #defines, from /usr/include/storclass.h that are not already
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defined in internal.h */
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/* Comment string in .info section */
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#define C_INFO 110
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/* Auxillary Symbol Entries */
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/* x_smtyp values: */
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#define SMTYP_ALIGN(x) ((x) >> 3) /* log2 of alignment */
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#define SMTYP_SMTYP(x) ((x) & 0x7) /* symbol type */
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/* Symbol type values: */
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#define XTY_ER 0 /* External reference */
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#define XTY_SD 1 /* Csect definition */
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#define XTY_LD 2 /* Label definition */
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#define XTY_CM 3 /* .BSS */
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#define XTY_EM 4 /* Error message */
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#define XTY_US 5 /* "Reserved for internal use" */
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/* x_smclas values: */
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#define XMC_PR 0 /* Read-only program code */
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#define XMC_RO 1 /* Read-only constant */
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#define XMC_DB 2 /* Read-only debug dictionary table */
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#define XMC_TC 3 /* Read-write general TOC entry */
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#define XMC_UA 4 /* Read-write unclassified */
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#define XMC_RW 5 /* Read-write data */
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#define XMC_GL 6 /* Read-only global linkage */
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#define XMC_XO 7 /* Read-only extended operation */
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#define XMC_SV 8 /* Read-only supervisor call */
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#define XMC_BS 9 /* Read-write BSS */
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#define XMC_DS 10 /* Read-write descriptor csect */
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#define XMC_UC 11 /* Read-write unnamed Fortran common */
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#define XMC_TI 12 /* Read-only traceback index csect */
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#define XMC_TB 13 /* Read-only traceback table csect */
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/* 14 ??? */
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#define XMC_TC0 15 /* Read-write TOC anchor */
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#define XMC_TD 16 /* Read-write data in TOC */
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#define XMC_SV64 17 /* Read-only 64 bit supervisor call */
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#define XMC_SV3264 18 /* Read-only 32 or 64 bit supervisor call */
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/* The ldhdr structure. This appears at the start of the .loader
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section. */
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struct internal_ldhdr
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{
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/* The version number:
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1 : 32 bit
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2 : 64 bit */
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unsigned long l_version;
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/* The number of symbol table entries. */
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bfd_size_type l_nsyms;
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/* The number of relocation table entries. */
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bfd_size_type l_nreloc;
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/* The length of the import file string table. */
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bfd_size_type l_istlen;
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/* The number of import files. */
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bfd_size_type l_nimpid;
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/* The offset from the start of the .loader section to the first
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entry in the import file table. */
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bfd_size_type l_impoff;
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/* The length of the string table. */
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bfd_size_type l_stlen;
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/* The offset from the start of the .loader section to the first
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entry in the string table. */
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bfd_size_type l_stoff;
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/* The offset to start of the symbol table, only in XCOFF64 */
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bfd_vma l_symoff;
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/* The offset to the start of the relocation table, only in XCOFF64 */
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bfd_vma l_rldoff;
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};
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/* The ldsym structure. This is used to represent a symbol in the
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.loader section. */
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struct internal_ldsym
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{
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union
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{
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/* The symbol name if <= SYMNMLEN characters. */
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char _l_name[SYMNMLEN];
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struct
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{
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/* Zero if the symbol name is more than SYMNMLEN characters. */
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long _l_zeroes;
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/* The offset in the string table if the symbol name is more
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than SYMNMLEN characters. */
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long _l_offset;
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}
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_l_l;
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}
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_l;
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/* The symbol value. */
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bfd_vma l_value;
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/* The symbol section number. */
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short l_scnum;
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/* The symbol type and flags. */
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char l_smtype;
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/* The symbol storage class. */
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char l_smclas;
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/* The import file ID. */
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bfd_size_type l_ifile;
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/* Offset to the parameter type check string. */
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bfd_size_type l_parm;
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};
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/* These flags are for the l_smtype field (the lower three bits are an
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XTY_* value). */
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/* Imported symbol. */
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#define L_IMPORT (0x40)
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/* Entry point. */
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#define L_ENTRY (0x20)
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/* Exported symbol. */
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#define L_EXPORT (0x10)
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/* The ldrel structure. This is used to represent a reloc in the
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.loader section. */
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struct internal_ldrel
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{
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/* The reloc address. */
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bfd_vma l_vaddr;
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/* The symbol table index in the .loader section symbol table. */
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bfd_size_type l_symndx;
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/* The relocation type and size. */
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short l_rtype;
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/* The section number this relocation applies to. */
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short l_rsecnm;
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};
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/* An entry in the XCOFF linker hash table. */
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struct xcoff_link_hash_entry
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{
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struct bfd_link_hash_entry root;
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/* Symbol index in output file. Set to -1 initially. Set to -2 if
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there is a reloc against this symbol. */
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long indx;
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/* If we have created a TOC entry for this symbol, this is the .tc
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section which holds it. */
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asection *toc_section;
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union
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{
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/* If we have created a TOC entry (the XCOFF_SET_TOC flag is
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set), this is the offset in toc_section. */
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bfd_vma toc_offset;
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/* If the TOC entry comes from an input file, this is set to the
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symbol index of the C_HIDEXT XMC_TC or XMC_TD symbol. */
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long toc_indx;
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}
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u;
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/* If this symbol is a function entry point which is called, this
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field holds a pointer to the function descriptor. If this symbol
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is a function descriptor, this field holds a pointer to the
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function entry point. */
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struct xcoff_link_hash_entry *descriptor;
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/* The .loader symbol table entry, if there is one. */
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struct internal_ldsym *ldsym;
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/* If XCOFF_BUILT_LDSYM is set, this is the .loader symbol table
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index. If XCOFF_BUILD_LDSYM is clear, and XCOFF_IMPORT is set,
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this is the l_ifile value. */
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long ldindx;
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/* Some linker flags. */
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unsigned long flags;
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/* The storage mapping class. */
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unsigned char smclas;
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};
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/* Flags for xcoff_link_hash_entry. */
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/* Symbol is referenced by a regular object. */
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#define XCOFF_REF_REGULAR 0x00000001
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/* Symbol is defined by a regular object. */
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#define XCOFF_DEF_REGULAR 0x00000002
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/* Symbol is defined by a dynamic object. */
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#define XCOFF_DEF_DYNAMIC 0x00000004
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/* Symbol is used in a reloc being copied into the .loader section. */
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#define XCOFF_LDREL 0x00000008
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/* Symbol is the entry point. */
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#define XCOFF_ENTRY 0x00000010
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/* Symbol is called; this is, it appears in a R_BR reloc. */
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#define XCOFF_CALLED 0x00000020
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/* Symbol needs the TOC entry filled in. */
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#define XCOFF_SET_TOC 0x00000040
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/* Symbol is explicitly imported. */
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#define XCOFF_IMPORT 0x00000080
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/* Symbol is explicitly exported. */
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#define XCOFF_EXPORT 0x00000100
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/* Symbol has been processed by xcoff_build_ldsyms. */
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#define XCOFF_BUILT_LDSYM 0x00000200
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/* Symbol is mentioned by a section which was not garbage collected. */
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#define XCOFF_MARK 0x00000400
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/* Symbol size is recorded in size_list list from hash table. */
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#define XCOFF_HAS_SIZE 0x00000800
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/* Symbol is a function descriptor. */
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#define XCOFF_DESCRIPTOR 0x00001000
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/* Multiple definitions have been for the symbol. */
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#define XCOFF_MULTIPLY_DEFINED 0x00002000
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/* Symbol is the __rtinit symbol. */
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#define XCOFF_RTINIT 0x00004000
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/* Symbol is an imported 32 bit syscall. */
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#define XCOFF_SYSCALL32 0x00008000
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/* Symbol is an imported 64 bit syscall. */
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#define XCOFF_SYSCALL64 0x00010000
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/* The XCOFF linker hash table. */
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#define XCOFF_NUMBER_OF_SPECIAL_SECTIONS 6
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#define XCOFF_SPECIAL_SECTION_TEXT 0
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#define XCOFF_SPECIAL_SECTION_ETEXT 1
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#define XCOFF_SPECIAL_SECTION_DATA 2
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#define XCOFF_SPECIAL_SECTION_EDATA 3
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#define XCOFF_SPECIAL_SECTION_END 4
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#define XCOFF_SPECIAL_SECTION_END2 5
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struct xcoff_link_hash_table
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{
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struct bfd_link_hash_table root;
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/* The .debug string hash table. We need to compute this while
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reading the input files, so that we know how large the .debug
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section will be before we assign section positions. */
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struct bfd_strtab_hash *debug_strtab;
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/* The .debug section we will use for the final output. */
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asection *debug_section;
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/* The .loader section we will use for the final output. */
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asection *loader_section;
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/* A count of non TOC relative relocs which will need to be
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allocated in the .loader section. */
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size_t ldrel_count;
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/* The .loader section header. */
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struct internal_ldhdr ldhdr;
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/* The .gl section we use to hold global linkage code. */
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asection *linkage_section;
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/* The .tc section we use to hold toc entries we build for global
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linkage code. */
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asection *toc_section;
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/* The .ds section we use to hold function descriptors which we
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create for exported symbols. */
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asection *descriptor_section;
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/* The list of import files. */
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struct xcoff_import_file *imports;
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/* Required alignment of sections within the output file. */
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unsigned long file_align;
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/* Whether the .text section must be read-only. */
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bfd_boolean textro;
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/* Whether garbage collection was done. */
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bfd_boolean gc;
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/* A linked list of symbols for which we have size information. */
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struct xcoff_link_size_list
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{
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struct xcoff_link_size_list *next;
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struct xcoff_link_hash_entry *h;
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bfd_size_type size;
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}
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*size_list;
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/* Magic sections: _text, _etext, _data, _edata, _end, end. */
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asection *special_sections[XCOFF_NUMBER_OF_SPECIAL_SECTIONS];
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};
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/* This structure is used to pass information through
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xcoff_link_hash_traverse. */
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struct xcoff_loader_info
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{
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/* Set if a problem occurred. */
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bfd_boolean failed;
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/* Output BFD. */
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bfd *output_bfd;
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/* Link information structure. */
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struct bfd_link_info *info;
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/* Whether all defined symbols should be exported. */
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bfd_boolean export_defineds;
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/* Number of ldsym structures. */
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size_t ldsym_count;
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/* Size of string table. */
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size_t string_size;
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/* String table. */
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bfd_byte *strings;
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/* Allocated size of string table. */
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size_t string_alc;
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};
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/* In case we're on a 32-bit machine, construct a 64-bit "-1" value
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from smaller values. Start with zero, widen, *then* decrement. */
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#define MINUS_ONE (((bfd_vma) 0) - 1)
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/* __rtinit, from /usr/include/rtinit.h. */
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struct __rtinit
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{
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/* Pointer to runtime linker.
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XXX: Is the parameter really void? */
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int (*rtl) PARAMS ((void));
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/* Offset to array of init functions, 0 if none. */
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int init_offset;
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/* Offset to array of fini functions, 0 if none. */
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int fini_offset;
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/* Size of __RTINIT_DESCRIPTOR. This value should be used instead of
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sizeof(__RTINIT_DESCRIPTOR). */
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int __rtinit_descriptor_size;
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};
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#define RTINIT_DESCRIPTOR_SIZE (12)
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struct __rtinit_descriptor
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{
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/* Init/fini function. */
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int f;
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/* Offset, relative to the start of the __rtinit symbol, to name of the
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function. */
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int name_offset;
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/* Flags */
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unsigned char flags;
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};
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/* Archive */
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#define XCOFFARMAG "<aiaff>\012"
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#define XCOFFARMAGBIG "<bigaf>\012"
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#define SXCOFFARMAG 8
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/* The size of the ascii archive elements */
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#define XCOFFARMAG_ELEMENT_SIZE 12
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#define XCOFFARMAGBIG_ELEMENT_SIZE 20
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/* This terminates an XCOFF archive member name. */
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#define XCOFFARFMAG "`\012"
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#define SXCOFFARFMAG 2
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/* XCOFF archives start with this (printable) structure. */
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struct xcoff_ar_file_hdr
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{
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/* Magic string. */
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char magic[SXCOFFARMAG];
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/* Offset of the member table (decimal ASCII string). */
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char memoff[XCOFFARMAG_ELEMENT_SIZE];
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/* Offset of the global symbol table (decimal ASCII string). */
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char symoff[XCOFFARMAG_ELEMENT_SIZE];
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/* Offset of the first member in the archive (decimal ASCII string). */
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char firstmemoff[XCOFFARMAG_ELEMENT_SIZE];
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/* Offset of the last member in the archive (decimal ASCII string). */
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char lastmemoff[XCOFFARMAG_ELEMENT_SIZE];
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/* Offset of the first member on the free list (decimal ASCII
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string). */
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char freeoff[XCOFFARMAG_ELEMENT_SIZE];
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};
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#define SIZEOF_AR_FILE_HDR (SXCOFFARMAG + 5 * XCOFFARMAG_ELEMENT_SIZE)
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/* This is the equivalent data structure for the big archive format. */
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struct xcoff_ar_file_hdr_big
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{
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/* Magic string. */
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char magic[SXCOFFARMAG];
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/* Offset of the member table (decimal ASCII string). */
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char memoff[XCOFFARMAGBIG_ELEMENT_SIZE];
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/* Offset of the global symbol table for 32-bit objects (decimal ASCII
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string). */
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char symoff[XCOFFARMAGBIG_ELEMENT_SIZE];
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/* Offset of the global symbol table for 64-bit objects (decimal ASCII
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string). */
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char symoff64[XCOFFARMAGBIG_ELEMENT_SIZE];
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/* Offset of the first member in the archive (decimal ASCII string). */
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char firstmemoff[XCOFFARMAGBIG_ELEMENT_SIZE];
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/* Offset of the last member in the archive (decimal ASCII string). */
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char lastmemoff[XCOFFARMAGBIG_ELEMENT_SIZE];
|
|
|
|
/* Offset of the first member on the free list (decimal ASCII
|
|
string). */
|
|
char freeoff[XCOFFARMAGBIG_ELEMENT_SIZE];
|
|
};
|
|
|
|
#define SIZEOF_AR_FILE_HDR_BIG (SXCOFFARMAG + 6 * XCOFFARMAGBIG_ELEMENT_SIZE)
|
|
|
|
/* Each XCOFF archive member starts with this (printable) structure. */
|
|
|
|
struct xcoff_ar_hdr
|
|
{
|
|
/* File size not including the header (decimal ASCII string). */
|
|
char size[XCOFFARMAG_ELEMENT_SIZE];
|
|
|
|
/* File offset of next archive member (decimal ASCII string). */
|
|
char nextoff[XCOFFARMAG_ELEMENT_SIZE];
|
|
|
|
/* File offset of previous archive member (decimal ASCII string). */
|
|
char prevoff[XCOFFARMAG_ELEMENT_SIZE];
|
|
|
|
/* 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 (3 * XCOFFARMAG_ELEMENT_SIZE + 4 * 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[XCOFFARMAGBIG_ELEMENT_SIZE];
|
|
|
|
/* File offset of next archive member (decimal ASCII string). */
|
|
char nextoff[XCOFFARMAGBIG_ELEMENT_SIZE];
|
|
|
|
/* File offset of previous archive member (decimal ASCII string). */
|
|
char prevoff[XCOFFARMAGBIG_ELEMENT_SIZE];
|
|
|
|
/* 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 * XCOFFARMAGBIG_ELEMENT_SIZE + 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.
|
|
<bigaf> is the default format, return TRUE even when xcoff_ardata is
|
|
NULL. */
|
|
#ifndef SMALL_ARCHIVE
|
|
/* Creates big archives by default */
|
|
#define xcoff_big_format_p(abfd) \
|
|
((NULL != bfd_ardata (abfd) && NULL == xcoff_ardata (abfd)) || \
|
|
((NULL != bfd_ardata (abfd)) && \
|
|
(NULL != xcoff_ardata (abfd)) && \
|
|
(xcoff_ardata (abfd)->magic[1] == 'b')))
|
|
#else
|
|
/* Creates small archives by default. */
|
|
#define xcoff_big_format_p(abfd) \
|
|
(((NULL != bfd_ardata (abfd)) && \
|
|
(NULL != xcoff_ardata (abfd)) && \
|
|
(xcoff_ardata (abfd)->magic[1] == 'b')))
|
|
#endif
|
|
|
|
/* 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 */
|