diff options
Diffstat (limited to 'include/linux/coff.h')
| -rw-r--r-- | include/linux/coff.h | 351 |
1 files changed, 0 insertions, 351 deletions
diff --git a/include/linux/coff.h b/include/linux/coff.h deleted file mode 100644 index 6354a7f..0000000 --- a/include/linux/coff.h +++ /dev/null @@ -1,351 +0,0 @@ -/* This file is derived from the GAS 2.1.4 assembler control file. - The GAS product is under the GNU General Public License, version 2 or later. - As such, this file is also under that license. - - If the file format changes in the COFF object, this file should be - subsequently updated to reflect the changes. - - The actual loader module only uses a few of these structures. The full - set is documented here because I received the full set. If you wish - more information about COFF, then O'Reilly has a very excellent book. -*/ - -#define E_SYMNMLEN 8 /* Number of characters in a symbol name */ -#define E_FILNMLEN 14 /* Number of characters in a file name */ -#define E_DIMNUM 4 /* Number of array dimensions in auxiliary entry */ - -/* - * These defines are byte order independent. There is no alignment of fields - * permitted in the structures. Therefore they are declared as characters - * and the values loaded from the character positions. It also makes it - * nice to have it "endian" independent. - */ - -/* Load a short int from the following tables with little-endian formats */ -#define COFF_SHORT_L(ps) ((short)(((unsigned short)((unsigned char)ps[1])<<8)|\ - ((unsigned short)((unsigned char)ps[0])))) - -/* Load a long int from the following tables with little-endian formats */ -#define COFF_LONG_L(ps) (((long)(((unsigned long)((unsigned char)ps[3])<<24) |\ - ((unsigned long)((unsigned char)ps[2])<<16) |\ - ((unsigned long)((unsigned char)ps[1])<<8) |\ - ((unsigned long)((unsigned char)ps[0]))))) - -/* Load a short int from the following tables with big-endian formats */ -#define COFF_SHORT_H(ps) ((short)(((unsigned short)((unsigned char)ps[0])<<8)|\ - ((unsigned short)((unsigned char)ps[1])))) - -/* Load a long int from the following tables with big-endian formats */ -#define COFF_LONG_H(ps) (((long)(((unsigned long)((unsigned char)ps[0])<<24) |\ - ((unsigned long)((unsigned char)ps[1])<<16) |\ - ((unsigned long)((unsigned char)ps[2])<<8) |\ - ((unsigned long)((unsigned char)ps[3]))))) - -/* These may be overridden later by brain dead implementations which generate - a big-endian header with little-endian data. In that case, generate a - replacement macro which tests a flag and uses either of the two above - as appropriate. */ - -#define COFF_LONG(v) COFF_LONG_L(v) -#define COFF_SHORT(v) COFF_SHORT_L(v) - -/*** coff information for Intel 386/486. */ - -/********************** FILE HEADER **********************/ - -struct COFF_filehdr { - char f_magic[2]; /* magic number */ - char f_nscns[2]; /* number of sections */ - char f_timdat[4]; /* time & date stamp */ - char f_symptr[4]; /* file pointer to symtab */ - char f_nsyms[4]; /* number of symtab entries */ - char f_opthdr[2]; /* sizeof(optional hdr) */ - char f_flags[2]; /* flags */ -}; - -/* - * Bits for f_flags: - * - * F_RELFLG relocation info stripped from file - * F_EXEC file is executable (i.e. no unresolved external - * references) - * F_LNNO line numbers stripped from file - * F_LSYMS local symbols stripped from file - * F_MINMAL this is a minimal object file (".m") output of fextract - * F_UPDATE this is a fully bound update file, output of ogen - * F_SWABD this file has had its bytes swabbed (in names) - * F_AR16WR this file has the byte ordering of an AR16WR - * (e.g. 11/70) machine - * F_AR32WR this file has the byte ordering of an AR32WR machine - * (e.g. vax and iNTEL 386) - * F_AR32W this file has the byte ordering of an AR32W machine - * (e.g. 3b,maxi) - * F_PATCH file contains "patch" list in optional header - * F_NODF (minimal file only) no decision functions for - * replaced functions - */ - -#define COFF_F_RELFLG 0000001 -#define COFF_F_EXEC 0000002 -#define COFF_F_LNNO 0000004 -#define COFF_F_LSYMS 0000010 -#define COFF_F_MINMAL 0000020 -#define COFF_F_UPDATE 0000040 -#define COFF_F_SWABD 0000100 -#define COFF_F_AR16WR 0000200 -#define COFF_F_AR32WR 0000400 -#define COFF_F_AR32W 0001000 -#define COFF_F_PATCH 0002000 -#define COFF_F_NODF 0002000 - -#define COFF_I386MAGIC 0x14c /* Linux's system */ - -#if 0 /* Perhaps, someday, these formats may be used. */ -#define COFF_I386PTXMAGIC 0x154 -#define COFF_I386AIXMAGIC 0x175 /* IBM's AIX system */ -#define COFF_I386BADMAG(x) ((COFF_SHORT((x).f_magic) != COFF_I386MAGIC) \ - && COFF_SHORT((x).f_magic) != COFF_I386PTXMAGIC \ - && COFF_SHORT((x).f_magic) != COFF_I386AIXMAGIC) -#else -#define COFF_I386BADMAG(x) (COFF_SHORT((x).f_magic) != COFF_I386MAGIC) -#endif - -#define COFF_FILHDR struct COFF_filehdr -#define COFF_FILHSZ sizeof(COFF_FILHDR) - -/********************** AOUT "OPTIONAL HEADER" **********************/ - -/* Linux COFF must have this "optional" header. Standard COFF has no entry - location for the "entry" point. They normally would start with the first - location of the .text section. This is not a good idea for linux. So, - the use of this "optional" header is not optional. It is required. - - Do not be tempted to assume that the size of the optional header is - a constant and simply index the next byte by the size of this structure. - Use the 'f_opthdr' field in the main coff header for the size of the - structure actually written to the file!! -*/ - -typedef struct -{ - char magic[2]; /* type of file */ - char vstamp[2]; /* version stamp */ - char tsize[4]; /* text size in bytes, padded to FW bdry */ - char dsize[4]; /* initialized data " " */ - char bsize[4]; /* uninitialized data " " */ - char entry[4]; /* entry pt. */ - char text_start[4]; /* base of text used for this file */ - char data_start[4]; /* base of data used for this file */ -} -COFF_AOUTHDR; - -#define COFF_AOUTSZ (sizeof(COFF_AOUTHDR)) - -#define COFF_STMAGIC 0401 -#define COFF_OMAGIC 0404 -#define COFF_JMAGIC 0407 /* dirty text and data image, can't share */ -#define COFF_DMAGIC 0410 /* dirty text segment, data aligned */ -#define COFF_ZMAGIC 0413 /* The proper magic number for executables */ -#define COFF_SHMAGIC 0443 /* shared library header */ - -/********************** SECTION HEADER **********************/ - -struct COFF_scnhdr { - char s_name[8]; /* section name */ - char s_paddr[4]; /* physical address, aliased s_nlib */ - char s_vaddr[4]; /* virtual address */ - char s_size[4]; /* section size */ - char s_scnptr[4]; /* file ptr to raw data for section */ - char s_relptr[4]; /* file ptr to relocation */ - char s_lnnoptr[4]; /* file ptr to line numbers */ - char s_nreloc[2]; /* number of relocation entries */ - char s_nlnno[2]; /* number of line number entries */ - char s_flags[4]; /* flags */ -}; - -#define COFF_SCNHDR struct COFF_scnhdr -#define COFF_SCNHSZ sizeof(COFF_SCNHDR) - -/* - * names of "special" sections - */ - -#define COFF_TEXT ".text" -#define COFF_DATA ".data" -#define COFF_BSS ".bss" -#define COFF_COMMENT ".comment" -#define COFF_LIB ".lib" - -#define COFF_SECT_TEXT 0 /* Section for instruction code */ -#define COFF_SECT_DATA 1 /* Section for initialized globals */ -#define COFF_SECT_BSS 2 /* Section for un-initialized globals */ -#define COFF_SECT_REQD 3 /* Minimum number of sections for good file */ - -#define COFF_STYP_REG 0x00 /* regular segment */ -#define COFF_STYP_DSECT 0x01 /* dummy segment */ -#define COFF_STYP_NOLOAD 0x02 /* no-load segment */ -#define COFF_STYP_GROUP 0x04 /* group segment */ -#define COFF_STYP_PAD 0x08 /* .pad segment */ -#define COFF_STYP_COPY 0x10 /* copy section */ -#define COFF_STYP_TEXT 0x20 /* .text segment */ -#define COFF_STYP_DATA 0x40 /* .data segment */ -#define COFF_STYP_BSS 0x80 /* .bss segment */ -#define COFF_STYP_INFO 0x200 /* .comment section */ -#define COFF_STYP_OVER 0x400 /* overlay section */ -#define COFF_STYP_LIB 0x800 /* library section */ - -/* - * Shared libraries have the following section header in the data field for - * each library. - */ - -struct COFF_slib { - char sl_entsz[4]; /* Size of this entry */ - char sl_pathndx[4]; /* size of the header field */ -}; - -#define COFF_SLIBHD struct COFF_slib -#define COFF_SLIBSZ sizeof(COFF_SLIBHD) - -/********************** 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 COFF_lineno { - union { - char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ - char l_paddr[4]; /* (physical) address of line number */ - } l_addr; - char l_lnno[2]; /* line number */ -}; - -#define COFF_LINENO struct COFF_lineno -#define COFF_LINESZ 6 - -/********************** SYMBOLS **********************/ - -#define COFF_E_SYMNMLEN 8 /* # characters in a short symbol name */ -#define COFF_E_FILNMLEN 14 /* # characters in a file name */ -#define COFF_E_DIMNUM 4 /* # array dimensions in auxiliary entry */ - -/* - * All symbols and sections have the following definition - */ - -struct COFF_syment -{ - union { - char e_name[E_SYMNMLEN]; /* Symbol name (first 8 characters) */ - struct { - char e_zeroes[4]; /* Leading zeros */ - char e_offset[4]; /* Offset if this is a header section */ - } e; - } e; - - char e_value[4]; /* Value (address) of the segment */ - char e_scnum[2]; /* Section number */ - char e_type[2]; /* Type of section */ - char e_sclass[1]; /* Loader class */ - char e_numaux[1]; /* Number of auxiliary entries which follow */ -}; - -#define COFF_N_BTMASK (0xf) /* Mask for important class bits */ -#define COFF_N_TMASK (0x30) /* Mask for important type bits */ -#define COFF_N_BTSHFT (4) /* # bits to shift class field */ -#define COFF_N_TSHIFT (2) /* # bits to shift type field */ - -/* - * Auxiliary entries because the main table is too limiting. - */ - -union COFF_auxent { - -/* - * Debugger information - */ - - struct { - char x_tagndx[4]; /* str, un, or enum tag indx */ - union { - struct { - char x_lnno[2]; /* declaration line number */ - char x_size[2]; /* str/union/array size */ - } x_lnsz; - char x_fsize[4]; /* size of function */ - } x_misc; - - union { - struct { /* if ISFCN, tag, or .bb */ - char x_lnnoptr[4]; /* ptr to fcn line # */ - char x_endndx[4]; /* entry ndx past block end */ - } x_fcn; - - struct { /* if ISARY, up to 4 dimen. */ - char x_dimen[E_DIMNUM][2]; - } x_ary; - } x_fcnary; - - char x_tvndx[2]; /* tv index */ - } x_sym; - -/* - * Source file names (debugger information) - */ - - union { - char x_fname[E_FILNMLEN]; - struct { - char x_zeroes[4]; - char x_offset[4]; - } x_n; - } x_file; - -/* - * Section information - */ - - struct { - char x_scnlen[4]; /* section length */ - char x_nreloc[2]; /* # relocation entries */ - char x_nlinno[2]; /* # line numbers */ - } x_scn; - -/* - * Transfer vector (branch table) - */ - - struct { - char x_tvfill[4]; /* tv fill value */ - char x_tvlen[2]; /* length of .tv */ - char x_tvran[2][2]; /* tv range */ - } x_tv; /* info about .tv section (in auxent of symbol .tv)) */ -}; - -#define COFF_SYMENT struct COFF_syment -#define COFF_SYMESZ 18 -#define COFF_AUXENT union COFF_auxent -#define COFF_AUXESZ 18 - -#define COFF_ETEXT "etext" - -/********************** RELOCATION DIRECTIVES **********************/ - -struct COFF_reloc { - char r_vaddr[4]; /* Virtual address of item */ - char r_symndx[4]; /* Symbol index in the symtab */ - char r_type[2]; /* Relocation type */ -}; - -#define COFF_RELOC struct COFF_reloc -#define COFF_RELSZ 10 - -#define COFF_DEF_DATA_SECTION_ALIGNMENT 4 -#define COFF_DEF_BSS_SECTION_ALIGNMENT 4 -#define COFF_DEF_TEXT_SECTION_ALIGNMENT 4 - -/* For new sections we haven't heard of before */ -#define COFF_DEF_SECTION_ALIGNMENT 4 |
