/* Internal format of COFF object file data structures, for GNU BFD. This file is part of BFD, the Binary File Descriptor library. */ /* First, make "signed char" work, even on old compilers. */ #ifndef signed #ifndef __STDC__ #define signed /**/ #endif #endif /********************** FILE HEADER **********************/ struct internal_filehdr { unsigned short f_magic; /* magic number */ unsigned short f_nscns; /* number of sections */ long f_timdat; /* time & date stamp */ long f_symptr; /* file pointer to symtab */ long f_nsyms; /* number of symtab entries */ unsigned short f_opthdr; /* sizeof(optional hdr) */ unsigned short f_flags; /* flags */ }; /* Bits for f_flags: * F_RELFLG relocation info stripped from file * F_EXEC file is executable (no unresolved external references) * F_LNNO line numbers stripped from file * F_LSYMS local symbols stripped from file * F_AR16WR file is 16-bit little-endian * F_AR32WR file is 32-bit little-endian * F_AR32W file is 32-bit big-endian * F_DYNLOAD rs/6000 aix: dynamically loadable w/imports & exports * F_SHROBJ rs/6000 aix: file is a shared object */ #define F_RELFLG (0x0001) #define F_EXEC (0x0002) #define F_LNNO (0x0004) #define F_LSYMS (0x0008) #define F_AR16WR (0x0080) #define F_AR32WR (0x0100) #define F_AR32W (0x0200) #define F_DYNLOAD (0x1000) #define F_SHROBJ (0x2000) /********************** AOUT "OPTIONAL HEADER" **********************/ struct internal_aouthdr { short magic; /* type of file */ short vstamp; /* version stamp */ unsigned long tsize; /* text size in bytes, padded to FW bdry*/ unsigned long dsize; /* initialized data " " */ unsigned long bsize; /* uninitialized data " " */ unsigned long entry; /* entry pt. */ unsigned long text_start; /* base of text used for this file */ unsigned long data_start; /* base of data used for this file */ /* i960 stuff */ unsigned long tagentries; /* number of tag entries to follow */ /* RS/6000 stuff */ unsigned long o_toc; /* address of TOC */ short o_snentry; /* section number for entry point */ short o_sntext; /* section number for text */ short o_sndata; /* section number for data */ short o_sntoc; /* section number for toc */ short o_snloader; /* section number for loader section */ short o_snbss; /* section number for bss */ short o_algntext; /* max alignment for text */ short o_algndata; /* max alignment for data */ short o_modtype; /* Module type field, 1R,RE,RO */ unsigned long o_maxstack; /* max stack size allowed. */ }; /********************** STORAGE CLASSES **********************/ #define C_EFCN -1 /* physical end of function */ #define C_NULL 0 #define C_AUTO 1 /* automatic variable */ #define C_EXT 2 /* external symbol */ #define C_STAT 3 /* static */ #define C_REG 4 /* register variable */ #define C_EXTDEF 5 /* external definition */ #define C_LABEL 6 /* label */ #define C_ULABEL 7 /* undefined label */ #define C_MOS 8 /* member of structure */ #define C_ARG 9 /* function argument */ #define C_STRTAG 10 /* structure tag */ #define C_MOU 11 /* member of union */ #define C_UNTAG 12 /* union tag */ #define C_TPDEF 13 /* type definition */ #define C_USTATIC 14 /* undefined static */ #define C_ENTAG 15 /* enumeration tag */ #define C_MOE 16 /* member of enumeration */ #define C_REGPARM 17 /* register parameter */ #define C_FIELD 18 /* bit field */ #define C_AUTOARG 19 /* auto argument */ #define C_LASTENT 20 /* dummy entry (end of block) */ #define C_BLOCK 100 /* ".bb" or ".eb" */ #define C_FCN 101 /* ".bf" or ".ef" */ #define C_EOS 102 /* end of structure */ #define C_FILE 103 /* file name */ #define C_LINE 104 /* line # reformatted as symbol table entry */ #define C_ALIAS 105 /* duplicate tag */ #define C_HIDDEN 106 /* ext symbol in dmert public lib */ /* New storage classes for 80960 */ /* C_LEAFPROC is obsolete. Use C_LEAFEXT or C_LEAFSTAT */ #define C_LEAFPROC 108 /* Leaf procedure, "call" via BAL */ #define C_SCALL 107 /* Procedure reachable via system call */ #define C_LEAFEXT 108 /* External leaf */ #define C_LEAFSTAT 113 /* Static leaf */ #define C_OPTVAR 109 /* Optimized variable */ #define C_DEFINE 110 /* Preprocessor #define */ #define C_PRAGMA 111 /* Advice to compiler or linker */ #define C_SEGMENT 112 /* 80960 segment name */ /* New storage classes for RS/6000 */ #define C_HIDEXT 107 /* Un-named external symbol */ #define C_BINCL 108 /* Marks beginning of include file */ #define C_EINCL 109 /* Marks ending of include file */ /* storage classes for stab symbols for RS/6000 */ #define C_GSYM ((signed char)0x80) #define C_LSYM ((signed char)0x81) #define C_PSYM ((signed char)0x82) #define C_RSYM ((signed char)0x83) #define C_RPSYM ((signed char)0x84) #define C_STSYM ((signed char)0x85) #define C_TCSYM ((signed char)0x86) #define C_BCOMM ((signed char)0x87) #define C_ECOML ((signed char)0x88) #define C_ECOMM ((signed char)0x89) #define C_DECL ((signed char)0x8c) #define C_ENTRY ((signed char)0x8d) #define C_FUN ((signed char)0x8e) #define C_BSTAT ((signed char)0x8f) #define C_ESTAT ((signed char)0x90) /********************** SECTION HEADER **********************/ struct internal_scnhdr { char s_name[8]; /* section name */ long s_paddr; /* physical address, aliased s_nlib */ long s_vaddr; /* virtual address */ long s_size; /* section size */ long s_scnptr; /* file ptr to raw data for section */ long s_relptr; /* file ptr to relocation */ long s_lnnoptr; /* file ptr to line numbers */ unsigned long s_nreloc; /* number of relocation entries */ unsigned long s_nlnno; /* number of line number entries*/ long s_flags; /* flags */ #ifdef I960 long s_align; #endif }; /* * s_flags "type" */ #define STYP_REG (0x0000) /* "regular": allocated, relocated, loaded */ #define STYP_DSECT (0x0001) /* "dummy": relocated only*/ #define STYP_NOLOAD (0x0002) /* "noload": allocated, relocated, not loaded */ #define STYP_GROUP (0x0004) /* "grouped": formed of input sections */ #define STYP_PAD (0x0008) /* "padding": not allocated, not relocated, loaded */ #define STYP_COPY (0x0010) /* "copy": for decision function used by field update; not allocated, not relocated, loaded; reloc & lineno entries processed normally */ #define STYP_TEXT (0x0020) /* section contains text only */ #define S_SHRSEG (0x0020) /* In 3b Update files (output of ogen), sections which appear in SHARED segments of the Pfile will have the S_SHRSEG flag set by ogen, to inform dufr that updating 1 copy of the proc. will update all process invocations. */ #define STYP_DATA (0x0040) /* section contains data only */ #define STYP_BSS (0x0080) /* section contains bss only */ #define S_NEWFCN (0x0100) /* In a minimal file or an update file, a new function (as compared with a replaced function) */ #define STYP_INFO (0x0200) /* comment: not allocated not relocated, not loaded */ #define STYP_OVER (0x0400) /* overlay: relocated not allocated or loaded */ #define STYP_LIB (0x0800) /* for .lib: same as INFO */ #define STYP_MERGE (0x2000) /* merge section -- combines with text, data or bss sections only */ #define STYP_REVERSE_PAD (0x4000) /* section will be padded with no-op instructions wherever padding is necessary and there is a word of contiguous bytes beginning on a word boundary. */ /********************** LINE NUMBERS **********************/ /* 1 line number entry for every "breakpointable" source line in a section. * Line numbers are grouped on a per function basis; first entry in a function * grouping will have l_lnno = 0 and in place of physical address will be the * symbol table index of the function name. */ struct internal_lineno { union { long l_symndx; /* function name symbol index, iff l_lnno == 0*/ long l_paddr; /* (physical) address of line number */ } l_addr; unsigned long l_lnno; /* line number */ }; /********************** SYMBOLS **********************/ #define SYMNMLEN 8 /* # characters in a symbol name */ #define FILNMLEN 14 /* # characters in a file name */ #define DIMNUM 4 /* # array dimensions in auxiliary entry */ struct internal_syment { union { char _n_name[SYMNMLEN]; /* old COFF version */ struct { long _n_zeroes; /* new == 0 */ long _n_offset; /* offset into string table */ } _n_n; char *_n_nptr[2]; /* allows for overlaying */ } _n; long n_value; /* value of symbol */ short n_scnum; /* section number */ unsigned short n_flags; /* copy of flags from filhdr */ unsigned short n_type; /* type and derived type */ signed char n_sclass; /* storage class */ char n_numaux; /* number of aux. entries */ }; #define n_name _n._n_name #define n_zeroes _n._n_n._n_zeroes #define n_offset _n._n_n._n_offset /* Relocatable symbols have number of the section in which they are defined, or one of the following: */ #define N_UNDEF ((short)0) /* undefined symbol */ #define N_ABS ((short)-1) /* value of symbol is absolute */ #define N_DEBUG ((short)-2) /* debugging symbol -- value is meaningless */ #define N_TV ((short)-3) /* indicates symbol needs preload transfer vector */ #define P_TV ((short)-4) /* indicates symbol needs postload transfer vector*/ /* * Type of a symbol, in low N bits of the word */ #define T_NULL 0 #define T_VOID 1 /* function argument (only used by compiler) */ #define T_CHAR 2 /* character */ #define T_SHORT 3 /* short integer */ #define T_INT 4 /* integer */ #define T_LONG 5 /* long integer */ #define T_FLOAT 6 /* floating point */ #define T_DOUBLE 7 /* double word */ #define T_STRUCT 8 /* structure */ #define T_UNION 9 /* union */ #define T_ENUM 10 /* enumeration */ #define T_MOE 11 /* member of enumeration*/ #define T_UCHAR 12 /* unsigned character */ #define T_USHORT 13 /* unsigned short */ #define T_UINT 14 /* unsigned integer */ #define T_ULONG 15 /* unsigned long */ #define T_LNGDBL 16 /* long double */ /* * derived types, in n_type */ #define DT_NON (0) /* no derived type */ #define DT_PTR (1) /* pointer */ #define DT_FCN (2) /* function */ #define DT_ARY (3) /* array */ #define BTYPE(x) ((x) & N_BTMASK) #define ISPTR(x) (((x) & N_TMASK) == (DT_PTR << N_BTSHFT)) #define ISFCN(x) (((x) & N_TMASK) == (DT_FCN << N_BTSHFT)) #define ISARY(x) (((x) & N_TMASK) == (DT_ARY << N_BTSHFT)) #define ISTAG(x) ((x)==C_STRTAG||(x)==C_UNTAG||(x)==C_ENTAG) #define DECREF(x) ((((x)>>N_TSHIFT)&~N_BTMASK)|((x)&N_BTMASK)) union internal_auxent { struct { union { long l; /* str, un, or enum tag indx */ struct coff_ptr_struct *p; } x_tagndx; union { struct { unsigned short x_lnno; /* declaration line number */ unsigned short x_size; /* str/union/array size */ } x_lnsz; long x_fsize; /* size of function */ } x_misc; union { struct { /* if ISFCN, tag, or .bb */ long x_lnnoptr; /* ptr to fcn line # */ union { /* entry ndx past block end */ long l; struct coff_ptr_struct *p; } x_endndx; } x_fcn; struct { /* if ISARY, up to 4 dimen. */ unsigned short x_dimen[DIMNUM]; } x_ary; } x_fcnary; unsigned short x_tvndx; /* tv index */ } x_sym; union { char x_fname[FILNMLEN]; struct { long x_zeroes; long x_offset; } x_n; } x_file; struct { long x_scnlen; /* section length */ unsigned short x_nreloc; /* # relocation entries */ unsigned short x_nlinno; /* # line numbers */ } x_scn; struct { long x_tvfill; /* tv fill value */ unsigned short x_tvlen; /* length of .tv */ unsigned short x_tvran[2]; /* tv range */ } x_tv; /* info about .tv section (in auxent of symbol .tv)) */ /****************************************** * RS/6000-specific auxent - last auxent for every external symbol ******************************************/ struct { long x_scnlen; /* csect length */ long x_parmhash; /* parm type hash index */ unsigned short x_snhash; /* sect num with parm hash */ unsigned char x_smtyp; /* symbol align and type */ /* 0-4 - Log 2 of alignment */ /* 5-7 - symbol type */ unsigned char x_smclas; /* storage mapping class */ long x_stab; /* dbx stab info index */ unsigned short x_snstab; /* sect num with dbx stab */ } x_csect; /* csect definition information */ /* 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 (simulated insn) */ #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 for TOC addressability */ /****************************************** * I960-specific *2nd* aux. entry formats ******************************************/ struct { /* This is a very old typo that keeps getting propagated. */ #define x_stdindx x_stindx long x_stindx; /* sys. table entry */ } x_sc; /* system call entry */ struct { unsigned long x_balntry; /* BAL entry point */ } x_bal; /* BAL-callable function */ struct { unsigned long x_timestamp; /* time stamp */ char x_idstring[20]; /* producer identity string */ } x_ident; /* Producer ident info */ }; /********************** RELOCATION DIRECTIVES **********************/ struct internal_reloc { long r_vaddr; /* Virtual address of reference */ long r_symndx; /* Index into symbol table */ unsigned short r_type; /* Relocation type */ #if RS6000COFF_C unsigned char r_size; #endif unsigned short r_offset; }; #define R_RELBYTE 017 #define R_RELWORD 020 #define R_PCRBYTE 022 #define R_PCRWORD 023 #define R_PCRLONG 024 #define R_DIR32 06 #define R_PCLONG 020 #define R_RELBYTE 017 #define R_RELWORD 020 #define R_PCRBYTE 022 #define R_PCRWORD 023 #define R_PCRLONG 024 #define R_PCR16L 128 #define R_PCR26L 129 #define R_VRT16 130 #define R_HVRT16 131 #define R_LVRT16 132 #define R_VRT32 133 #define R_RELLONG (0x11) /* Direct 32-bit relocation */ #define R_IPRSHORT (0x18) #define R_IPRMED (0x19) /* 24-bit ip-relative relocation */ #define R_IPRLONG (0x1a) #define R_OPTCALL (0x1b) /* 32-bit optimizable call (leafproc/sysproc) */ #define R_OPTCALLX (0x1c) /* 64-bit optimizable call (leafproc/sysproc) */ #define R_GETSEG (0x1d) #define R_GETPA (0x1e) #define R_TAGWORD (0x1f) #define R_JUMPTARG 0x20 /* strange 29k 00xx00xx reloc */