obj-coff.h

来自「基于4个mips核的noc设计」· C头文件 代码 · 共 873 行 · 第 1/3 页

/*
 * Internal use only definitions. SF_ stands for symbol flags.
 *
 * These values can be assigned to sy_symbol.ost_flags field of a symbolS.
 *
 * You'll break i960 if you shift the SYSPROC bits anywhere else.  for
 * more on the balname/callname hack, see tc-i960.h.  b.out is done
 * differently.
 */

#define SF_I960_MASK	(0x000001ff)	/* Bits 0-8 are used by the i960 port.  */
#define SF_SYSPROC	(0x0000003f)	/* bits 0-5 are used to store the sysproc number */
#define SF_IS_SYSPROC	(0x00000040)	/* bit 6 marks symbols that are sysprocs */
#define SF_BALNAME	(0x00000080)	/* bit 7 marks BALNAME symbols */
#define SF_CALLNAME	(0x00000100)	/* bit 8 marks CALLNAME symbols */

#define SF_NORMAL_MASK	(0x0000ffff)	/* bits 12-15 are general purpose.  */

#define SF_STATICS	(0x00001000)	/* Mark the .text & all symbols */
#define SF_DEFINED	(0x00002000)	/* Symbol is defined in this file */
#define SF_STRING	(0x00004000)	/* Symbol name length > 8 */
#define SF_LOCAL	(0x00008000)	/* Symbol must not be emitted */

#define SF_DEBUG_MASK	(0xffff0000)	/* bits 16-31 are debug info */

#define SF_FUNCTION	(0x00010000)	/* The symbol is a function */
#define SF_PROCESS	(0x00020000)	/* Process symbol before write */
#define SF_TAGGED	(0x00040000)	/* Is associated with a tag */
#define SF_TAG		(0x00080000)	/* Is a tag */
#define SF_DEBUG	(0x00100000)	/* Is in debug or abs section */
#define SF_GET_SEGMENT	(0x00200000)	/* Get the section of the forward symbol.  */
/* All other bits are unused.  */

/* Accessors */
#define SF_GET(s)		(*symbol_get_obj (s))
#define SF_GET_DEBUG(s)		(symbol_get_bfdsym (s)->flags & BSF_DEBUGGING)
#define SF_SET_DEBUG(s)		(symbol_get_bfdsym (s)->flags |= BSF_DEBUGGING)
#define SF_GET_NORMAL_FIELD(s)	(SF_GET (s) & SF_NORMAL_MASK)
#define SF_GET_DEBUG_FIELD(s)	(SF_GET (s) & SF_DEBUG_MASK)
#define SF_GET_FILE(s)		(SF_GET (s) & SF_FILE)
#define SF_GET_STATICS(s)	(SF_GET (s) & SF_STATICS)
#define SF_GET_DEFINED(s)	(SF_GET (s) & SF_DEFINED)
#define SF_GET_STRING(s)	(SF_GET (s) & SF_STRING)
#define SF_GET_LOCAL(s)		(SF_GET (s) & SF_LOCAL)
#define SF_GET_FUNCTION(s)      (SF_GET (s) & SF_FUNCTION)
#define SF_GET_PROCESS(s)	(SF_GET (s) & SF_PROCESS)
#define SF_GET_TAGGED(s)	(SF_GET (s) & SF_TAGGED)
#define SF_GET_TAG(s)		(SF_GET (s) & SF_TAG)
#define SF_GET_GET_SEGMENT(s)	(SF_GET (s) & SF_GET_SEGMENT)
#define SF_GET_I960(s)		(SF_GET (s) & SF_I960_MASK)	/* used by i960 */
#define SF_GET_BALNAME(s)	(SF_GET (s) & SF_BALNAME)	/* used by i960 */
#define SF_GET_CALLNAME(s)	(SF_GET (s) & SF_CALLNAME)	/* used by i960 */
#define SF_GET_IS_SYSPROC(s)	(SF_GET (s) & SF_IS_SYSPROC)	/* used by i960 */
#define SF_GET_SYSPROC(s)	(SF_GET (s) & SF_SYSPROC)	/* used by i960 */

/* Modifiers */
#define SF_SET(s,v)		(SF_GET (s) = (v))
#define SF_SET_NORMAL_FIELD(s,v) (SF_GET (s) |= ((v) & SF_NORMAL_MASK))
#define SF_SET_DEBUG_FIELD(s,v)	(SF_GET (s) |= ((v) & SF_DEBUG_MASK))
#define SF_SET_FILE(s)		(SF_GET (s) |= SF_FILE)
#define SF_SET_STATICS(s)	(SF_GET (s) |= SF_STATICS)
#define SF_SET_DEFINED(s)	(SF_GET (s) |= SF_DEFINED)
#define SF_SET_STRING(s)	(SF_GET (s) |= SF_STRING)
#define SF_SET_LOCAL(s)		(SF_GET (s) |= SF_LOCAL)
#define SF_CLEAR_LOCAL(s)	(SF_GET (s) &= ~SF_LOCAL)
#define SF_SET_FUNCTION(s)      (SF_GET (s) |= SF_FUNCTION)
#define SF_SET_PROCESS(s)	(SF_GET (s) |= SF_PROCESS)
#define SF_SET_TAGGED(s)	(SF_GET (s) |= SF_TAGGED)
#define SF_SET_TAG(s)		(SF_GET (s) |= SF_TAG)
#define SF_SET_GET_SEGMENT(s)	(SF_GET (s) |= SF_GET_SEGMENT)
#define SF_SET_I960(s,v)	(SF_GET (s) |= ((v) & SF_I960_MASK))	/* used by i960 */
#define SF_SET_BALNAME(s)	(SF_GET (s) |= SF_BALNAME)	/* used by i960 */
#define SF_SET_CALLNAME(s)	(SF_GET (s) |= SF_CALLNAME)	/* used by i960 */
#define SF_SET_IS_SYSPROC(s)	(SF_GET (s) |= SF_IS_SYSPROC)	/* used by i960 */
#define SF_SET_SYSPROC(s,v)	(SF_GET (s) |= ((v) & SF_SYSPROC))	/* used by i960 */

/* --------------  Line number handling ------- */
extern int text_lineno_number;
extern int coff_line_base;
extern int coff_n_line_nos;

#define obj_emit_lineno(WHERE,LINE,FILE_START)	abort ()
extern void coff_add_linesym PARAMS ((symbolS *));

void c_dot_file_symbol PARAMS ((const char *filename));
#define obj_app_file c_dot_file_symbol

extern void coff_frob_symbol PARAMS ((symbolS *, int *));
extern void coff_adjust_symtab PARAMS ((void));
extern void coff_frob_section PARAMS ((segT));
extern void coff_adjust_section_syms PARAMS ((bfd *, asection *, PTR));
extern void coff_frob_file_after_relocs PARAMS ((void));
#define obj_frob_symbol(S,P) 	coff_frob_symbol(S,&P)
#ifndef obj_adjust_symtab
#define obj_adjust_symtab()	coff_adjust_symtab()
#endif
#define obj_frob_section(S)	coff_frob_section (S)
#define obj_frob_file_after_relocs() coff_frob_file_after_relocs ()

extern symbolS *coff_last_function;

/* Forward the segment of a forwarded symbol, handle assignments that
   just copy symbol values, etc.  */
#ifndef OBJ_COPY_SYMBOL_ATTRIBUTES
#ifndef TE_I386AIX
#define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src) \
  (SF_GET_GET_SEGMENT (dest) \
   ? (S_SET_SEGMENT (dest, S_GET_SEGMENT (src)), 0) \
   : 0)
#else
#define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src) \
  (SF_GET_GET_SEGMENT (dest) && S_GET_SEGMENT (dest) == SEG_UNKNOWN \
   ? (S_SET_SEGMENT (dest, S_GET_SEGMENT (src)), 0) \
   : 0)
#endif
#endif

/* sanity check */

#ifdef TC_I960
#ifndef C_LEAFSTAT
hey ! Where is the C_LEAFSTAT definition ? i960 - coff support is depending on it.
#endif /* no C_LEAFSTAT */
#endif /* TC_I960 */

#else /* not BFD_ASSEMBLER */

#ifdef TC_A29K
/* Allow translate from aout relocs to coff relocs */
#define NO_RELOC 20
#define RELOC_32 1
#define RELOC_8 2
#define RELOC_CONST 3
#define RELOC_CONSTH 4
#define RELOC_JUMPTARG 5
#define RELOC_BASE22 6
#define RELOC_HI22 7
#define RELOC_LO10 8
#define RELOC_BASE13 9
#define RELOC_WDISP22 10
#define RELOC_WDISP30 11
#endif

extern const segT N_TYPE_seg[];

/* Magic number of paged executable.  */
#define DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE	0x8300

/* SYMBOL TABLE */

/* Symbol table entry data type */

typedef struct
{
  /* Basic symbol */
  struct internal_syment ost_entry;
  /* Auxiliary entry.  */
  union internal_auxent ost_auxent[OBJ_COFF_MAX_AUXENTRIES];
  /* obj_coff internal use only flags */
  unsigned int ost_flags;
} obj_symbol_type;

#ifndef DO_NOT_STRIP
#define DO_NOT_STRIP	0
#endif
/* Symbol table macros and constants */

/* Possible and usefull section number in symbol table
 * The values of TEXT, DATA and BSS may not be portable.
 */

#define C_ABS_SECTION		N_ABS
#define C_UNDEF_SECTION		N_UNDEF
#define C_DEBUG_SECTION		N_DEBUG
#define C_NTV_SECTION		N_TV
#define C_PTV_SECTION		P_TV
#define C_REGISTER_SECTION	50

/*
 *  Macros to extract information from a symbol table entry.
 *  This syntaxic indirection allows independence regarding a.out or coff.
 *  The argument (s) of all these macros is a pointer to a symbol table entry.
 */

/* Predicates */
/* True if the symbol is external */
#define S_IS_EXTERNAL(s)        ((s)->sy_symbol.ost_entry.n_scnum == C_UNDEF_SECTION)
/* True if symbol has been defined, ie :
   section > 0 (DATA, TEXT or BSS)
   section == 0 and value > 0 (external bss symbol) */
#define S_IS_DEFINED(s) \
  ((s)->sy_symbol.ost_entry.n_scnum > C_UNDEF_SECTION \
   || ((s)->sy_symbol.ost_entry.n_scnum == C_UNDEF_SECTION \
       && S_GET_VALUE (s) > 0) \
   || ((s)->sy_symbol.ost_entry.n_scnum == C_ABS_SECTION))
/* True if a debug special symbol entry */
#define S_IS_DEBUG(s)		((s)->sy_symbol.ost_entry.n_scnum == C_DEBUG_SECTION)
/* True if a symbol is local symbol name */
/* A symbol name whose name includes ^A is a gas internal pseudo symbol */
#define S_IS_LOCAL(s) \
  ((s)->sy_symbol.ost_entry.n_scnum == C_REGISTER_SECTION \
   || (S_LOCAL_NAME(s) && ! flag_keep_locals && ! S_IS_DEBUG (s)) \
   || strchr (S_GET_NAME (s), '\001') != NULL \
   || strchr (S_GET_NAME (s), '\002') != NULL \
   || (flag_strip_local_absolute \
       && !S_IS_EXTERNAL(s) \
       && (s)->sy_symbol.ost_entry.n_scnum == C_ABS_SECTION))
/* True if a symbol is not defined in this file */
#define S_IS_EXTERN(s)		((s)->sy_symbol.ost_entry.n_scnum == 0 \
				 && S_GET_VALUE (s) == 0)
/*
 * True if a symbol can be multiply defined (bss symbols have this def
 * though it is bad practice)
 */
#define S_IS_COMMON(s)		((s)->sy_symbol.ost_entry.n_scnum == 0 \
				 && S_GET_VALUE (s) != 0)
/* True if a symbol name is in the string table, i.e. its length is > 8.  */
#define S_IS_STRING(s)		(strlen(S_GET_NAME(s)) > 8 ? 1 : 0)

/* True if a symbol is defined as weak.  */
#ifdef TE_PE
#define S_IS_WEAK(s) \
  ((s)->sy_symbol.ost_entry.n_sclass == C_NT_WEAK \
   || (s)->sy_symbol.ost_entry.n_sclass == C_WEAKEXT)
#else
#define S_IS_WEAK(s) \
  ((s)->sy_symbol.ost_entry.n_sclass == C_WEAKEXT)
#endif

/* Accessors */
/* The name of the symbol */
#define S_GET_NAME(s)		((char*) (s)->sy_symbol.ost_entry.n_offset)
/* The pointer to the string table */
#define S_GET_OFFSET(s)         ((s)->sy_symbol.ost_entry.n_offset)
/* The numeric value of the segment */
#define S_GET_SEGMENT(s)   s_get_segment(s)
/* The data type */
#define S_GET_DATA_TYPE(s)	((s)->sy_symbol.ost_entry.n_type)
/* The storage class */
#define S_GET_STORAGE_CLASS(s)	((s)->sy_symbol.ost_entry.n_sclass)
/* The number of auxiliary entries */
#define S_GET_NUMBER_AUXILIARY(s)	((s)->sy_symbol.ost_entry.n_numaux)

/* Modifiers */
/* Set the name of the symbol */
#define S_SET_NAME(s,v)		((s)->sy_symbol.ost_entry.n_offset = (unsigned long) (v))
/* Set the offset of the symbol */
#define S_SET_OFFSET(s,v)	((s)->sy_symbol.ost_entry.n_offset = (v))
/* The numeric value of the segment */
#define S_SET_SEGMENT(s,v)	((s)->sy_symbol.ost_entry.n_scnum = SEGMENT_TO_SYMBOL_TYPE(v))
/* The data type */
#define S_SET_DATA_TYPE(s,v)	((s)->sy_symbol.ost_entry.n_type = (v))
/* The storage class */
#define S_SET_STORAGE_CLASS(s,v)	((s)->sy_symbol.ost_entry.n_sclass = (v))
/* The number of auxiliary entries */
#define S_SET_NUMBER_AUXILIARY(s,v)	((s)->sy_symbol.ost_entry.n_numaux = (v))

/* Additional modifiers */
/* The symbol is external (does not mean undefined) */
#define S_SET_EXTERNAL(s)       { S_SET_STORAGE_CLASS(s, C_EXT) ; SF_CLEAR_LOCAL(s); }

/* Auxiliary entry macros. SA_ stands for symbol auxiliary */
/* Omit the tv related fields */
/* Accessors */
#define SYM_AUXENT(S)	(&(S)->sy_symbol.ost_auxent[0])

#define SA_GET_SYM_TAGNDX(s)	(SYM_AUXENT (s)->x_sym.x_tagndx.l)
#define SA_GET_SYM_LNNO(s)	(SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_lnno)
#define SA_GET_SYM_SIZE(s)	(SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_size)
#define SA_GET_SYM_FSIZE(s)	(SYM_AUXENT (s)->x_sym.x_misc.x_fsize)
#define SA_GET_SYM_LNNOPTR(s)	(SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_lnnoptr)
#define SA_GET_SYM_ENDNDX(s)	(SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_endndx.l)
#define SA_GET_SYM_DIMEN(s,i)	(SYM_AUXENT (s)->x_sym.x_fcnary.x_ary.x_dimen[(i)])
#define SA_GET_FILE_FNAME(s)	(SYM_AUXENT (s)->x_file.x_fname)
#define SA_GET_FILE_FNAME_OFFSET(s)  (SYM_AUXENT (s)->x_file.x_n.x_offset)
#define SA_GET_FILE_FNAME_ZEROS(s)   (SYM_AUXENT (s)->x_file.x_n.x_zeroes)
#define SA_GET_SCN_SCNLEN(s)	(SYM_AUXENT (s)->x_scn.x_scnlen)
#define SA_GET_SCN_NRELOC(s)	(SYM_AUXENT (s)->x_scn.x_nreloc)
#define SA_GET_SCN_NLINNO(s)	(SYM_AUXENT (s)->x_scn.x_nlinno)

/* Modifiers */
#define SA_SET_SYM_TAGNDX(s,v)	(SYM_AUXENT (s)->x_sym.x_tagndx.l=(v))
#define SA_SET_SYM_LNNO(s,v)	(SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_lnno=(v))
#define SA_SET_SYM_SIZE(s,v)	(SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_size=(v))
#define SA_SET_SYM_FSIZE(s,v)	(SYM_AUXENT (s)->x_sym.x_misc.x_fsize=(v))
#define SA_SET_SYM_LNNOPTR(s,v)	(SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_lnnoptr=(v))
#define SA_SET_SYM_ENDNDX(s,v)	(SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_endndx.l=(v))
#define SA_SET_SYM_DIMEN(s,i,v)	(SYM_AUXENT (s)->x_sym.x_fcnary.x_ary.x_dimen[(i)]=(v))
#define SA_SET_FILE_FNAME(s,v)	strncpy(SYM_AUXENT (s)->x_file.x_fname,(v),FILNMLEN)
#define SA_SET_FILE_FNAME_OFFSET(s,v) (SYM_AUXENT (s)->x_file.x_n.x_offset=(v))