coffcode.h

来自「基于4个mips核的noc设计」· C头文件 代码 · 共 2,097 行 · 第 1/5 页

  pei_section_data (abfd, section)->virt_size = hdr->s_paddr;
  pei_section_data (abfd, section)->pe_flags = hdr->s_flags;

  section->lma = hdr->s_vaddr;

  /* check for extended relocs */
  if (hdr->s_flags & IMAGE_SCN_LNK_NRELOC_OVFL)
    {
      struct external_reloc dst;
      struct internal_reloc n;
      int oldpos = bfd_tell (abfd);
      bfd_seek (abfd, hdr->s_relptr, 0);
      if (bfd_read ((PTR) & dst, 1, bfd_coff_relsz (abfd), abfd)
	  != bfd_coff_relsz (abfd))
	return;

      coff_swap_reloc_in (abfd, &dst, &n);
      bfd_seek (abfd, oldpos, 0);
      section->reloc_count =
	hdr->s_nreloc = n.r_vaddr;
    }
}
#undef ALIGN_SET
#undef ELIFALIGN_SET

#else /* ! COFF_WITH_PE */
#ifdef RS6000COFF_C

/* We grossly abuse this function to handle XCOFF overflow headers.
   When we see one, we correct the reloc and line number counts in the
   real header, and remove the section we just created.  */

static void coff_set_alignment_hook PARAMS ((bfd *, asection *, PTR));

static void
coff_set_alignment_hook (abfd, section, scnhdr)
     bfd *abfd;
     asection *section;
     PTR scnhdr;
{
  struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
  asection *real_sec;
  asection **ps;

  if ((hdr->s_flags & STYP_OVRFLO) == 0)
    return;

  real_sec = coff_section_from_bfd_index (abfd, hdr->s_nreloc);
  if (real_sec == NULL)
    return;

  real_sec->reloc_count = hdr->s_paddr;
  real_sec->lineno_count = hdr->s_vaddr;

  for (ps = &abfd->sections; *ps != NULL; ps = &(*ps)->next)
    {
      if (*ps == section)
	{
	  *ps = (*ps)->next;
	  --abfd->section_count;
	  break;
	}
    }
}

#else /* ! RS6000COFF_C */

#define coff_set_alignment_hook \
  ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)

#endif /* ! RS6000COFF_C */
#endif /* ! COFF_WITH_PE */
#endif /* ! COFF_ALIGN_IN_SECTION_HEADER */

#ifndef coff_mkobject

static boolean coff_mkobject PARAMS ((bfd *));

static boolean
coff_mkobject (abfd)
     bfd * abfd;
{
  coff_data_type *coff;

  abfd->tdata.coff_obj_data = (struct coff_tdata *) bfd_zalloc (abfd, sizeof (coff_data_type));
  if (abfd->tdata.coff_obj_data == 0)
    return false;
  coff = coff_data (abfd);
  coff->symbols = (coff_symbol_type *) NULL;
  coff->conversion_table = (unsigned int *) NULL;
  coff->raw_syments = (struct coff_ptr_struct *) NULL;
  coff->relocbase = 0;
  coff->local_toc_sym_map = 0;

/*  make_abs_section(abfd);*/

  return true;
}
#endif

/* Create the COFF backend specific information.  */
#ifndef coff_mkobject_hook
static PTR
coff_mkobject_hook (abfd, filehdr, aouthdr)
     bfd * abfd;
     PTR filehdr;
     PTR aouthdr ATTRIBUTE_UNUSED;
{
  struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
  coff_data_type *coff;

  if (coff_mkobject (abfd) == false)
    return NULL;

  coff = coff_data (abfd);

  coff->sym_filepos = internal_f->f_symptr;

  /* These members communicate important constants about the symbol
     table to GDB's symbol-reading code.  These `constants'
     unfortunately vary among coff implementations...  */
  coff->local_n_btmask = N_BTMASK;
  coff->local_n_btshft = N_BTSHFT;
  coff->local_n_tmask = N_TMASK;
  coff->local_n_tshift = N_TSHIFT;
  coff->local_symesz = bfd_coff_symesz (abfd);
  coff->local_auxesz = bfd_coff_auxesz (abfd);
  coff->local_linesz = bfd_coff_linesz (abfd);

  coff->timestamp = internal_f->f_timdat;

  obj_raw_syment_count (abfd) =
    obj_conv_table_size (abfd) =
      internal_f->f_nsyms;

#ifdef RS6000COFF_C
  if ((internal_f->f_flags & F_SHROBJ) != 0)
    abfd->flags |= DYNAMIC;
  if (aouthdr != NULL && internal_f->f_opthdr >= bfd_coff_aoutsz (abfd))
    {
      struct internal_aouthdr *internal_a =
	(struct internal_aouthdr *) aouthdr;
      struct xcoff_tdata *xcoff;

      xcoff = xcoff_data (abfd);
# ifdef U803XTOCMAGIC
      xcoff->xcoff64 = internal_f->f_magic == U803XTOCMAGIC;
# else
      xcoff->xcoff64 = 0;
# endif
      xcoff->full_aouthdr = true;
      xcoff->toc = internal_a->o_toc;
      xcoff->sntoc = internal_a->o_sntoc;
      xcoff->snentry = internal_a->o_snentry;
      xcoff->text_align_power = internal_a->o_algntext;
      xcoff->data_align_power = internal_a->o_algndata;
      xcoff->modtype = internal_a->o_modtype;
      xcoff->cputype = internal_a->o_cputype;
      xcoff->maxdata = internal_a->o_maxdata;
      xcoff->maxstack = internal_a->o_maxstack;
    }
#endif

#ifdef ARM
  /* Set the flags field from the COFF header read in */
  if (! _bfd_coff_arm_set_private_flags (abfd, internal_f->f_flags))
    coff->flags = 0;
#endif

#ifdef COFF_WITH_PE
  /* FIXME: I'm not sure this is ever executed, since peicode.h
     defines coff_mkobject_hook.  */
  if ((internal_f->f_flags & IMAGE_FILE_DEBUG_STRIPPED) == 0)
    abfd->flags |= HAS_DEBUG;
#endif

  return (PTR) coff;
}
#endif

/* Determine the machine architecture and type.  FIXME: This is target
   dependent because the magic numbers are defined in the target
   dependent header files.  But there is no particular need for this.
   If the magic numbers were moved to a separate file, this function
   would be target independent and would also be much more successful
   at linking together COFF files for different architectures.  */

static boolean
coff_set_arch_mach_hook (abfd, filehdr)
     bfd *abfd;
     PTR filehdr;
{
  long machine;
  enum bfd_architecture arch;
  struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;

  machine = 0;
  switch (internal_f->f_magic)
    {
#ifdef PPCMAGIC
    case PPCMAGIC:
      arch = bfd_arch_powerpc;
      machine = 0; /* what does this mean? (krk) */
      break;
#endif
#ifdef I386MAGIC
    case I386MAGIC:
    case I386PTXMAGIC:
    case I386AIXMAGIC:		/* Danbury PS/2 AIX C Compiler */
    case LYNXCOFFMAGIC:	/* shadows the m68k Lynx number below, sigh */
      arch = bfd_arch_i386;
      machine = 0;
      break;
#endif
#ifdef IA64MAGIC
    case IA64MAGIC:
      arch = bfd_arch_ia64;
      machine = 0;
      break;
#endif
#ifdef A29K_MAGIC_BIG
    case A29K_MAGIC_BIG:
    case A29K_MAGIC_LITTLE:
      arch = bfd_arch_a29k;
      machine = 0;
      break;
#endif
#ifdef ARMMAGIC
    case ARMMAGIC:
    case ARMPEMAGIC:
    case THUMBPEMAGIC:
      arch = bfd_arch_arm;
      switch (internal_f->f_flags & F_ARM_ARCHITECTURE_MASK)
	{
        case F_ARM_2:  machine = bfd_mach_arm_2;  break;
        case F_ARM_2a: machine = bfd_mach_arm_2a; break;
        case F_ARM_3:  machine = bfd_mach_arm_3;  break;
        default:
        case F_ARM_3M: machine = bfd_mach_arm_3M; break;
        case F_ARM_4:  machine = bfd_mach_arm_4;  break;
        case F_ARM_4T: machine = bfd_mach_arm_4T; break;
        case F_ARM_5:  machine = bfd_mach_arm_5;  break;
	}
      break;
#endif
#ifdef MC68MAGIC
    case MC68MAGIC:
    case M68MAGIC:
#ifdef MC68KBCSMAGIC
    case MC68KBCSMAGIC:
#endif
#ifdef APOLLOM68KMAGIC
    case APOLLOM68KMAGIC:
#endif
#ifdef LYNXCOFFMAGIC
    case LYNXCOFFMAGIC:
#endif
      arch = bfd_arch_m68k;
      machine = bfd_mach_m68020;
      break;
#endif
#ifdef MC88MAGIC
    case MC88MAGIC:
    case MC88DMAGIC:
    case MC88OMAGIC:
      arch = bfd_arch_m88k;
      machine = 88100;
      break;
#endif
#ifdef Z8KMAGIC
    case Z8KMAGIC:
      arch = bfd_arch_z8k;
      switch (internal_f->f_flags & F_MACHMASK)
	{
	case F_Z8001:
	  machine = bfd_mach_z8001;
	  break;
	case F_Z8002:
	  machine = bfd_mach_z8002;
	  break;
	default:
	  return false;
	}
      break;
#endif
#ifdef I860
    case I860MAGIC:
      arch = bfd_arch_i860;
      break;
#endif
#ifdef I960
#ifdef I960ROMAGIC
    case I960ROMAGIC:
    case I960RWMAGIC:
      arch = bfd_arch_i960;
      switch (F_I960TYPE & internal_f->f_flags)
	{
	default:
	case F_I960CORE:
	  machine = bfd_mach_i960_core;
	  break;
	case F_I960KB:
	  machine = bfd_mach_i960_kb_sb;
	  break;
	case F_I960MC:
	  machine = bfd_mach_i960_mc;
	  break;
	case F_I960XA:
	  machine = bfd_mach_i960_xa;
	  break;
	case F_I960CA:
	  machine = bfd_mach_i960_ca;
	  break;
	case F_I960KA:
	  machine = bfd_mach_i960_ka_sa;
	  break;
	case F_I960JX:
	  machine = bfd_mach_i960_jx;
	  break;
	case F_I960HX:
	  machine = bfd_mach_i960_hx;
	  break;
	}
      break;
#endif
#endif

#ifdef RS6000COFF_C
#ifdef XCOFF64
    case U803XTOCMAGIC:
#else
    case U802ROMAGIC:
    case U802WRMAGIC:
    case U802TOCMAGIC:
#endif
      {
	int cputype;

	if (xcoff_data (abfd)->cputype != -1)
	  cputype = xcoff_data (abfd)->cputype & 0xff;
	else
	  {
	    /* We did not get a value from the a.out header.  If the
	       file has not been stripped, we may be able to get the
	       architecture information from the first symbol, if it
	       is a .file symbol.  */
	    if (obj_raw_syment_count (abfd) == 0)
	      cputype = 0;
	    else
	      {
		bfd_byte *buf;
		struct internal_syment sym;

		buf = (bfd_byte *) bfd_malloc (bfd_coff_symesz (abfd));
		if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
		    || (bfd_read (buf, 1, bfd_coff_symesz (abfd), abfd)
			!= bfd_coff_symesz (abfd)))
		  {
		    free (buf);
		    return false;
		  }
		bfd_coff_swap_sym_in (abfd, (PTR) buf, (PTR) &sym);
		if (sym.n_sclass == C_FILE)
		  cputype = sym.n_type & 0xff;
		else
		  cputype = 0;
		free (buf);
	      }
	  }

	/* FIXME: We don't handle all cases here.  */
	switch (cputype)
	  {
	  default:
	  case 0:
#ifdef POWERMAC
	    /* PowerPC Macs use the same magic numbers as RS/6000
	       (because that's how they were bootstrapped originally),
	       but they are always PowerPC architecture.  */
	    arch = bfd_arch_powerpc;
	    machine = bfd_mach_ppc;
#else
#ifdef XCOFF64
	    arch = bfd_arch_powerpc;
	    machine = bfd_mach_ppc_620;
#else
	    arch = bfd_arch_rs6000;
	    machine = bfd_mach_rs6k;
#endif
#endif /* POWERMAC */
	    break;

	  case 1:
	    arch = bfd_arch_powerpc;
	    machine = bfd_mach_ppc_601;
	    break;
	  case 2: /* 64 bit PowerPC */
	    arch = bfd_arch_powerpc;
	    machine = bfd_mach_ppc_620;
	    break;
	  case 3:
	    arch = bfd_arch_powerpc;
	    machine = bfd_mach_ppc;
	    break;
	  case 4:
	    arch = bfd_arch_rs6000;
	    machine = bfd_mach_rs6k;
	    break;
	  }
      }
      break;
#endif

#ifdef WE32KMAGIC
    case WE32KMAGIC:
      arch = bfd_arch_we32k;