forked from Mirrors/tinycc
447 lines
22 KiB
C
447 lines
22 KiB
C
/**************************************************************************/
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/* COFF.H */
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/* COFF data structures and related definitions used by the linker */
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/**************************************************************************/
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/*------------------------------------------------------------------------*/
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/* COFF FILE HEADER */
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/*------------------------------------------------------------------------*/
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struct filehdr {
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unsigned short f_magic; /* magic number */
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unsigned short f_nscns; /* number of sections */
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long f_timdat; /* time & date stamp */
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long f_symptr; /* file pointer to symtab */
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long f_nsyms; /* number of symtab entries */
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unsigned short f_opthdr; /* sizeof(optional hdr) */
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unsigned short f_flags; /* flags */
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unsigned short f_TargetID; /* for C6x = 0x0099 */
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};
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/*------------------------------------------------------------------------*/
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/* File header flags */
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/*------------------------------------------------------------------------*/
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#define F_RELFLG 0x01 /* relocation info stripped from file */
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#define F_EXEC 0x02 /* file is executable (no unresolved refs) */
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#define F_LNNO 0x04 /* line numbers stripped from file */
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#define F_LSYMS 0x08 /* local symbols stripped from file */
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#define F_GSP10 0x10 /* 34010 version */
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#define F_GSP20 0x20 /* 34020 version */
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#define F_SWABD 0x40 /* bytes swabbed (in names) */
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#define F_AR16WR 0x80 /* byte ordering of an AR16WR (PDP-11) */
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#define F_LITTLE 0x100 /* byte ordering of an AR32WR (vax) */
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#define F_BIG 0x200 /* byte ordering of an AR32W (3B, maxi) */
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#define F_PATCH 0x400 /* contains "patch" list in optional header */
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#define F_NODF 0x400
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#define F_VERSION (F_GSP10 | F_GSP20)
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#define F_BYTE_ORDER (F_LITTLE | F_BIG)
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#define FILHDR struct filehdr
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/* #define FILHSZ sizeof(FILHDR) */
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#define FILHSZ 22 /* above rounds to align on 4 bytes which causes problems */
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#define COFF_C67_MAGIC 0x00c2
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/*------------------------------------------------------------------------*/
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/* Macros to recognize magic numbers */
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/*------------------------------------------------------------------------*/
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#define ISMAGIC(x) (((unsigned short)(x))==(unsigned short)magic)
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#define ISARCHIVE(x) ((((unsigned short)(x))==(unsigned short)ARTYPE))
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#define BADMAGIC(x) (((unsigned short)(x) & 0x8080) && !ISMAGIC(x))
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/*------------------------------------------------------------------------*/
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/* OPTIONAL FILE HEADER */
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/*------------------------------------------------------------------------*/
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typedef struct aouthdr {
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short magic; /* see magic.h */
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short vstamp; /* version stamp */
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long tsize; /* text size in bytes, padded to FW bdry*/
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long dsize; /* initialized data " " */
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long bsize; /* uninitialized data " " */
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long entrypt; /* entry pt. */
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long text_start; /* base of text used for this file */
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long data_start; /* base of data used for this file */
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} AOUTHDR;
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#define AOUTSZ sizeof(AOUTHDR)
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/*----------------------------------------------------------------------*/
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/* When a UNIX aout header is to be built in the optional header, */
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/* the following magic numbers can appear in that header: */
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/* */
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/* AOUT1MAGIC : default : readonly sharable text segment */
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/* AOUT2MAGIC: : writable text segment */
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/* PAGEMAGIC : : configured for paging */
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/*----------------------------------------------------------------------*/
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#define AOUT1MAGIC 0410
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#define AOUT2MAGIC 0407
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#define PAGEMAGIC 0413
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/*------------------------------------------------------------------------*/
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/* COMMON ARCHIVE FILE STRUCTURES */
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/* */
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/* ARCHIVE File Organization: */
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/* _______________________________________________ */
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/* |__________ARCHIVE_MAGIC_STRING_______________| */
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/* |__________ARCHIVE_FILE_MEMBER_1______________| */
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/* | | */
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/* | Archive File Header "ar_hdr" | */
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/* |.............................................| */
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/* | Member Contents | */
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/* | 1. External symbol directory | */
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/* | 2. Text file | */
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/* |_____________________________________________| */
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/* |________ARCHIVE_FILE_MEMBER_2________________| */
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/* | "ar_hdr" | */
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/* |.............................................| */
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/* | Member Contents (.o or text file) | */
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/* |_____________________________________________| */
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/* | . . . | */
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/* | . . . | */
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/* | . . . | */
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/* |_____________________________________________| */
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/* |________ARCHIVE_FILE_MEMBER_n________________| */
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/* | "ar_hdr" | */
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/* |.............................................| */
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/* | Member Contents | */
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/* |_____________________________________________| */
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/* */
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/*------------------------------------------------------------------------*/
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#define COFF_ARMAG "!<arch>\n"
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#define SARMAG 8
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#define ARFMAG "`\n"
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struct ar_hdr /* archive file member header - printable ascii */
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{
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char ar_name[16]; /* file member name - `/' terminated */
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char ar_date[12]; /* file member date - decimal */
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char ar_uid[6]; /* file member user id - decimal */
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char ar_gid[6]; /* file member group id - decimal */
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char ar_mode[8]; /* file member mode - octal */
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char ar_size[10]; /* file member size - decimal */
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char ar_fmag[2]; /* ARFMAG - string to end header */
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};
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/*------------------------------------------------------------------------*/
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/* SECTION HEADER */
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/*------------------------------------------------------------------------*/
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struct scnhdr {
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char s_name[8]; /* section name */
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long s_paddr; /* physical address */
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long s_vaddr; /* virtual address */
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long s_size; /* section size */
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long s_scnptr; /* file ptr to raw data for section */
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long s_relptr; /* file ptr to relocation */
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long s_lnnoptr; /* file ptr to line numbers */
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unsigned int s_nreloc; /* number of relocation entries */
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unsigned int s_nlnno; /* number of line number entries */
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unsigned int s_flags; /* flags */
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unsigned short s_reserved; /* reserved byte */
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unsigned short s_page; /* memory page id */
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};
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#define SCNHDR struct scnhdr
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#define SCNHSZ sizeof(SCNHDR)
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/*------------------------------------------------------------------------*/
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/* Define constants for names of "special" sections */
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/*------------------------------------------------------------------------*/
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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 _CINIT ".cinit"
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#define _TV ".tv"
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/*------------------------------------------------------------------------*/
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/* The low 4 bits of s_flags is used as a section "type" */
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/*------------------------------------------------------------------------*/
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#define STYP_REG 0x00 /* "regular" : allocated, relocated, loaded */
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#define STYP_DSECT 0x01 /* "dummy" : not allocated, relocated, not loaded */
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#define STYP_NOLOAD 0x02 /* "noload" : allocated, relocated, not loaded */
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#define STYP_GROUP 0x04 /* "grouped" : formed of input sections */
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#define STYP_PAD 0x08 /* "padding" : not allocated, not relocated, loaded */
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#define STYP_COPY 0x10 /* "copy" : used for C init tables -
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not allocated, relocated,
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loaded; reloc & lineno
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entries processed normally */
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#define STYP_TEXT 0x20 /* section contains text only */
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#define STYP_DATA 0x40 /* section contains data only */
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#define STYP_BSS 0x80 /* section contains bss only */
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#define STYP_ALIGN 0x100 /* align flag passed by old version assemblers */
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#define ALIGN_MASK 0x0F00 /* part of s_flags that is used for align vals */
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#define ALIGNSIZE(x) (1 << ((x & ALIGN_MASK) >> 8))
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/*------------------------------------------------------------------------*/
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/* RELOCATION ENTRIES */
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/*------------------------------------------------------------------------*/
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struct reloc
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{
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long r_vaddr; /* (virtual) address of reference */
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short r_symndx; /* index into symbol table */
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unsigned short r_disp; /* additional bits for address calculation */
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unsigned short r_type; /* relocation type */
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};
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#define RELOC struct reloc
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#define RELSZ 10 /* sizeof(RELOC) */
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/*--------------------------------------------------------------------------*/
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/* define all relocation types */
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/*--------------------------------------------------------------------------*/
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#define R_ABS 0 /* absolute address - no relocation */
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#define R_DIR16 01 /* UNUSED */
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#define R_REL16 02 /* UNUSED */
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#define R_DIR24 04 /* UNUSED */
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#define R_REL24 05 /* 24 bits, direct */
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#define R_DIR32 06 /* UNUSED */
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#define R_RELBYTE 017 /* 8 bits, direct */
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#define R_RELWORD 020 /* 16 bits, direct */
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#define R_RELLONG 021 /* 32 bits, direct */
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#define R_PCRBYTE 022 /* 8 bits, PC-relative */
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#define R_PCRWORD 023 /* 16 bits, PC-relative */
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#define R_PCRLONG 024 /* 32 bits, PC-relative */
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#define R_OCRLONG 030 /* GSP: 32 bits, one's complement direct */
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#define R_GSPPCR16 031 /* GSP: 16 bits, PC relative (in words) */
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#define R_GSPOPR32 032 /* GSP: 32 bits, direct big-endian */
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#define R_PARTLS16 040 /* Brahma: 16 bit offset of 24 bit address*/
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#define R_PARTMS8 041 /* Brahma: 8 bit page of 24 bit address */
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#define R_PARTLS7 050 /* DSP: 7 bit offset of 16 bit address */
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#define R_PARTMS9 051 /* DSP: 9 bit page of 16 bit address */
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#define R_REL13 052 /* DSP: 13 bits, direct */
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/*------------------------------------------------------------------------*/
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/* LINE NUMBER ENTRIES */
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/*------------------------------------------------------------------------*/
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struct lineno
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{
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union
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{
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long l_symndx ; /* sym. table index of function name
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iff l_lnno == 0 */
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long l_paddr ; /* (physical) address of line number */
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} l_addr ;
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unsigned short l_lnno ; /* line number */
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};
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#define LINENO struct lineno
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#define LINESZ 6 /* sizeof(LINENO) */
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/*------------------------------------------------------------------------*/
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/* STORAGE CLASSES */
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/*------------------------------------------------------------------------*/
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#define C_EFCN -1 /* physical end of function */
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#define C_NULL 0
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#define C_AUTO 1 /* automatic variable */
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#define C_EXT 2 /* external symbol */
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#define C_STAT 3 /* static */
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#define C_REG 4 /* register variable */
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#define C_EXTDEF 5 /* external definition */
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#define C_LABEL 6 /* label */
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#define C_ULABEL 7 /* undefined label */
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#define C_MOS 8 /* member of structure */
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#define C_ARG 9 /* function argument */
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#define C_STRTAG 10 /* structure tag */
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#define C_MOU 11 /* member of union */
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#define C_UNTAG 12 /* union tag */
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#define C_TPDEF 13 /* type definition */
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#define C_USTATIC 14 /* undefined static */
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#define C_ENTAG 15 /* enumeration tag */
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#define C_MOE 16 /* member of enumeration */
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#define C_REGPARM 17 /* register parameter */
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#define C_FIELD 18 /* bit field */
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#define C_BLOCK 100 /* ".bb" or ".eb" */
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#define C_FCN 101 /* ".bf" or ".ef" */
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#define C_EOS 102 /* end of structure */
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#define C_FILE 103 /* file name */
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#define C_LINE 104 /* dummy sclass for line number entry */
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#define C_ALIAS 105 /* duplicate tag */
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#define C_HIDDEN 106 /* special storage class for external */
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/* symbols in dmert public libraries */
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/*------------------------------------------------------------------------*/
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/* SYMBOL TABLE ENTRIES */
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/*------------------------------------------------------------------------*/
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#define SYMNMLEN 8 /* Number of characters in a symbol name */
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#define FILNMLEN 14 /* Number of characters in a file name */
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#define DIMNUM 4 /* Number of array dimensions in auxiliary entry */
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struct syment
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{
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union
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{
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char _n_name[SYMNMLEN]; /* old COFF version */
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struct
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{
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long _n_zeroes; /* new == 0 */
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long _n_offset; /* offset into string table */
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} _n_n;
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char *_n_nptr[2]; /* allows for overlaying */
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} _n;
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long n_value; /* value of symbol */
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short n_scnum; /* section number */
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unsigned short n_type; /* type and derived type */
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char n_sclass; /* storage class */
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char n_numaux; /* number of aux. entries */
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};
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#define n_name _n._n_name
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#define n_nptr _n._n_nptr[1]
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#define n_zeroes _n._n_n._n_zeroes
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#define n_offset _n._n_n._n_offset
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/*------------------------------------------------------------------------*/
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/* Relocatable symbols have a section number of the */
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/* section in which they are defined. Otherwise, section */
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/* numbers have the following meanings: */
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/*------------------------------------------------------------------------*/
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#define N_UNDEF 0 /* undefined symbol */
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#define N_ABS -1 /* value of symbol is absolute */
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#define N_DEBUG -2 /* special debugging symbol */
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#define N_TV (unsigned short)-3 /* needs transfer vector (preload) */
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#define P_TV (unsigned short)-4 /* needs transfer vector (postload) */
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/*------------------------------------------------------------------------*/
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/* The fundamental type of a symbol packed into the low */
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/* 4 bits of the word. */
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/*------------------------------------------------------------------------*/
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#define _EF ".ef"
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#define T_NULL 0 /* no type info */
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#define T_ARG 1 /* function argument (only used by compiler) */
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#define T_CHAR 2 /* character */
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#define T_SHORT 3 /* short integer */
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#define T_INT 4 /* integer */
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#define T_LONG 5 /* long integer */
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#define T_FLOAT 6 /* floating point */
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#define T_DOUBLE 7 /* double word */
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#define T_STRUCT 8 /* structure */
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#define T_UNION 9 /* union */
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#define T_ENUM 10 /* enumeration */
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#define T_MOE 11 /* member of enumeration */
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#define T_UCHAR 12 /* unsigned character */
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#define T_USHORT 13 /* unsigned short */
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#define T_UINT 14 /* unsigned integer */
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#define T_ULONG 15 /* unsigned long */
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/*------------------------------------------------------------------------*/
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/* derived types are: */
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/*------------------------------------------------------------------------*/
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#define DT_NON 0 /* no derived type */
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#define DT_PTR 1 /* pointer */
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#define DT_FCN 2 /* function */
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#define DT_ARY 3 /* array */
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#define MKTYPE(basic, d1,d2,d3,d4,d5,d6) \
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((basic) | ((d1) << 4) | ((d2) << 6) | ((d3) << 8) |\
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((d4) << 10) | ((d5) << 12) | ((d6) << 14))
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/*------------------------------------------------------------------------*/
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/* type packing constants and macros */
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/*------------------------------------------------------------------------*/
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#define N_BTMASK_COFF 017
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#define N_TMASK_COFF 060
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#define N_TMASK1_COFF 0300
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#define N_TMASK2_COFF 0360
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#define N_BTSHFT_COFF 4
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#define N_TSHIFT_COFF 2
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#define BTYPE_COFF(x) ((x) & N_BTMASK_COFF)
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#define ISINT(x) (((x) >= T_CHAR && (x) <= T_LONG) || \
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((x) >= T_UCHAR && (x) <= T_ULONG) || (x) == T_ENUM)
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#define ISFLT_COFF(x) ((x) == T_DOUBLE || (x) == T_FLOAT)
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#define ISPTR_COFF(x) (((x) & N_TMASK_COFF) == (DT_PTR << N_BTSHFT_COFF))
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#define ISFCN_COFF(x) (((x) & N_TMASK_COFF) == (DT_FCN << N_BTSHFT_COFF))
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#define ISARY_COFF(x) (((x) & N_TMASK_COFF) == (DT_ARY << N_BTSHFT_COFF))
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#define ISTAG_COFF(x) ((x)==C_STRTAG || (x)==C_UNTAG || (x)==C_ENTAG)
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#define INCREF_COFF(x) ((((x)&~N_BTMASK_COFF)<<N_TSHIFT_COFF)|(DT_PTR<<N_BTSHFT_COFF)|(x&N_BTMASK_COFF))
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#define DECREF_COFF(x) ((((x)>>N_TSHIFT_COFF)&~N_BTMASK_COFF)|((x)&N_BTMASK_COFF))
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/*------------------------------------------------------------------------*/
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/* AUXILIARY SYMBOL ENTRY */
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/*------------------------------------------------------------------------*/
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union auxent
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{
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struct
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{
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long x_tagndx; /* str, un, or enum tag indx */
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union
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{
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struct
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{
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unsigned short x_lnno; /* declaration line number */
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unsigned short x_size; /* str, union, array size */
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} x_lnsz;
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long x_fsize; /* size of function */
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} x_misc;
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union
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{
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struct /* if ISFCN, tag, or .bb */
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{
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long x_lnnoptr; /* ptr to fcn line # */
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long x_endndx; /* entry ndx past block end */
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} x_fcn;
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struct /* if ISARY, up to 4 dimen. */
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{
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unsigned short x_dimen[DIMNUM];
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} x_ary;
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} x_fcnary;
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unsigned short x_regcount; /* number of registers used by func */
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} x_sym;
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struct
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{
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char x_fname[FILNMLEN];
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} x_file;
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struct
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{
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long x_scnlen; /* section length */
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unsigned short x_nreloc; /* number of relocation entries */
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unsigned short x_nlinno; /* number of line numbers */
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} x_scn;
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};
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#define SYMENT struct syment
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#define SYMESZ 18 /* sizeof(SYMENT) */
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#define AUXENT union auxent
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#define AUXESZ 18 /* sizeof(AUXENT) */
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/*------------------------------------------------------------------------*/
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/* NAMES OF "SPECIAL" SYMBOLS */
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/*------------------------------------------------------------------------*/
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#define _STEXT ".text"
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#define _ETEXT "etext"
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#define _SDATA ".data"
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#define _EDATA "edata"
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#define _SBSS ".bss"
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#define _END "end"
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#define _CINITPTR "cinit"
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/*--------------------------------------------------------------------------*/
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/* ENTRY POINT SYMBOLS */
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/*--------------------------------------------------------------------------*/
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#define _START "_start"
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#define _MAIN "_main"
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/* _CSTART "_c_int00" (defined in params.h) */
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#define _TVORIG "_tvorig"
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#define _TORIGIN "_torigin"
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#define _DORIGIN "_dorigin"
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#define _SORIGIN "_sorigin"
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