coff-c55x.h

Omap5910 上实现双核通信 DSP GateWay

/*
 * 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

/*
 * cinit structure
 * T.Koba
 */
struct COFF_cinit {
  char size[2];
  char addr[3];
  char flags[1];
  char data[0];
};

#define	COFF_CINIT	struct COFF_cinit
#define	COFF_CINITSZ	6

#define COFF_CINIT_FLAG_MEMORY	0x00
#define COFF_CINIT_FLAG_IO	0x01

/********************** 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    */

/*
 *  Storage class for c55x (T.Koba)
 */
#define COFF_C_NULL	0
#define COFF_C_AUTO	1
#define COFF_C_EXT	2
#define COFF_C_STAT	3
#define COFF_C_REG	4
#define COFF_C_EXTREF	5
#define COFF_C_LABEL	6
#define COFF_C_ULABEL	7
#define COFF_C_MOS	8
#define COFF_C_ARG	9
#define COFF_C_STRTAG	10
#define COFF_C_MOU	11
#define COFF_C_UNTAG	12
#define COFF_C_TPDEF	13
#define COFF_C_USTATIC	14
#define COFF_C_ENTAG	15
#define COFF_C_MOE	16
#define COFF_C_REGRARM	17
#define COFF_C_FIELD	18
#define COFF_C_BLOCK	100
#define COFF_C_FCN	101
#define COFF_C_EOS	102
#define COFF_C_FILE	103
#define COFF_C_LINE	104

/*
 *  Symbol type for c55x (T.Koba)
 */
#define COFF_T_NULL	0
#define COFF_T_CHAR	2
#define COFF_T_SHORT	3
#define COFF_T_INT	4
#define COFF_T_LONG	5
#define COFF_T_FLOAT	6
#define COFF_T_DOUBLE	7
#define COFF_T_STRUCT	8
#define COFF_T_UNION	9
#define COFF_T_ENUM	10
#define COFF_T_MOE	11
#define COFF_T_UCHAR	12
#define COFF_T_USHORT	13

#define COFF_DT_NON	0
#define COFF_DT_PTR	1
#define COFF_DT_FCN	2
#define COFF_DT_ARY	3

/*
 *  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_exa[2];          /* extended address calc      */
  char r_type[2];         /* Relocation type            */
};

/*
 * Relocation Type: T.Koba
 */
#define COFF_R_ABS		0x0000
#define COFF_R_REL24		0x0005
#define COFF_R_RELBYTE		0x000f
#define COFF_R_RELWORD		0x0010
#define COFF_R_RELLONG		0x0011
#define COFF_R_LD3_DMA		0x0078
#define COFF_R_LD3_MDP		0x007a
#define COFF_R_LD3_PDP		0x007b
#define COFF_R_LD3_REL23	0x007c
#define COFF_R_LD3_k8		0x0088
#define COFF_R_LD3_k16		0x0089
#define COFF_R_LD3_K8		0x008a
#define COFF_R_LD3_K16		0x008b
#define COFF_R_LD3_l8		0x008c
#define COFF_R_LD3_l16		0x008d
#define COFF_R_LD3_L8		0x008e
#define COFF_R_LD3_L16		0x008f
#define COFF_R_LD3_k4		0x0090
#define COFF_R_LD3_k5		0x0091
#define COFF_R_LD3_K5		0x0092
#define COFF_R_LD3_k6		0x0093
#define COFF_R_LD3_k12		0x0094
#define COFF_R_LD3_REL16	0x0095 // hacked

#define COFF_R_EXTRA_BIT	0x4000
#define COFF_R_EX_ADD		0x4000 // hacked
#define COFF_R_EX_SUB		0x4001 // hacked
#define COFF_R_EX_RSHIFT	0x4007 // hacked
#define COFF_R_EX_MASK		0x4009 // hacked
#define COFF_R_EX_WRITE1	0x400f // hacked (???)
#define COFF_R_EX_WRITE2	0x4010 // hacked (???)
#define COFF_R_EX_PSHSYM	0x4011 // hacked
#define COFF_R_EX_PSHVAL	0x4013 // hacked
#define COFF_R_EX_PSHINTOFF	0x4014 // hacked
#define COFF_R_EX_WRITE3	0x4016 // hacked (???)

#define COFF_RELOC struct COFF_reloc
#define COFF_RELSZ 12

#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

#endif /* __COFF_C55X_H */