19990502 sourceware importbinu_ss_19990502

1 files changed, 640 insertions, 0 deletions

diff --git a/bfd/coff-a29k.c b/bfd/coff-a29k.c
new file mode 100644
index 0000000..bbf23ee
--- /dev/null
+++ b/bfd/coff-a29k.c
@@ -0,0 +1,640 @@
+/* BFD back-end for AMD 29000 COFF binaries.
+   Copyright 1990, 91, 92, 93, 94, 95, 1997 Free Software Foundation, Inc.
+   Contributed by David Wood at New York University 7/8/91.
+
+This file is part of BFD, the Binary File Descriptor library.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#define A29K 1
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+#include "coff/a29k.h"
+#include "coff/internal.h"
+#include "libcoff.h"
+
+static long get_symbol_value PARAMS ((asymbol *));
+static bfd_reloc_status_type a29k_reloc
+  PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+static boolean coff_a29k_relocate_section
+  PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
+	   struct internal_reloc *, struct internal_syment *, asection **));
+static boolean coff_a29k_adjust_symndx
+  PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
+	   struct internal_reloc *, boolean *));
+
+#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
+
+#define INSERT_HWORD(WORD,HWORD)	\
+    (((WORD) & 0xff00ff00) | (((HWORD) & 0xff00) << 8) | ((HWORD)& 0xff))
+#define EXTRACT_HWORD(WORD) \
+    ((((WORD) & 0x00ff0000) >> 8) | ((WORD)& 0xff))
+#define SIGN_EXTEND_HWORD(HWORD) \
+    ((HWORD) & 0x8000 ? (HWORD)|(~0xffffL) : (HWORD))
+
+/* Provided the symbol, returns the value reffed */
+static long
+get_symbol_value (symbol)       
+     asymbol *symbol;
+{                                             
+  long relocation = 0;
+
+  if (bfd_is_com_section (symbol->section))
+  {
+    relocation = 0;                           
+  }
+  else 
+  {                                      
+    relocation = symbol->value +
+     symbol->section->output_section->vma +
+      symbol->section->output_offset;
+  }                                           
+
+  return(relocation);
+}
+
+/* this function is in charge of performing all the 29k relocations */
+
+static bfd_reloc_status_type
+a29k_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
+	    error_message)
+     bfd *abfd;
+     arelent *reloc_entry;
+     asymbol *symbol_in;
+     PTR data;
+     asection *input_section;
+     bfd *output_bfd;
+     char **error_message;
+{
+  /* the consth relocation comes in two parts, we have to remember
+     the state between calls, in these variables */
+  static boolean part1_consth_active = false;
+  static unsigned long part1_consth_value;
+
+  unsigned long insn;
+  unsigned long sym_value;
+  unsigned long unsigned_value;
+  unsigned short r_type;
+  long signed_value;
+
+  unsigned long addr = reloc_entry->address ; /*+ input_section->vma*/
+  bfd_byte  *hit_data =addr + (bfd_byte *)(data);
+	
+  r_type = reloc_entry->howto->type;
+
+  if (output_bfd) {
+    /* Partial linking - do nothing */
+    reloc_entry->address += input_section->output_offset;
+    return bfd_reloc_ok;
+
+  }
+
+  if (symbol_in != NULL
+      && bfd_is_und_section (symbol_in->section))
+  {
+    /* Keep the state machine happy in case we're called again */
+    if (r_type == R_IHIHALF) 
+    {
+      part1_consth_active = true;
+      part1_consth_value  = 0;
+    }
+    return(bfd_reloc_undefined);
+  }
+
+  if ((part1_consth_active) && (r_type != R_IHCONST)) 
+  {
+    part1_consth_active = false;
+    *error_message = (char *) _("Missing IHCONST");
+    return(bfd_reloc_dangerous);
+  }
+
+
+  sym_value = get_symbol_value(symbol_in);
+
+  switch (r_type) 
+  {
+   case R_IREL: 	
+    insn = bfd_get_32(abfd, hit_data); 
+    /* Take the value in the field and sign extend it */
+    signed_value = EXTRACT_HWORD(insn);
+    signed_value = SIGN_EXTEND_HWORD(signed_value);
+    signed_value <<= 2;
+
+    /* See the note on the R_IREL reloc in coff_a29k_relocate_section.  */
+    if (signed_value == - (long) reloc_entry->address)
+      signed_value = 0;
+
+    signed_value += sym_value + reloc_entry->addend;
+    if ((signed_value & ~0x3ffff) == 0)
+    {				/* Absolute jmp/call */
+      insn |= (1<<24);		/* Make it absolute */
+      /* FIXME: Should we change r_type to R_IABS */
+    } 
+    else 
+    {
+      /* Relative jmp/call, so subtract from the value the
+	 address of the place we're coming from */
+      signed_value -= (reloc_entry->address
+		       + input_section->output_section->vma
+		       + input_section->output_offset);
+      if (signed_value>0x1ffff || signed_value<-0x20000) 
+       return(bfd_reloc_overflow);
+    }
+    signed_value >>= 2;
+    insn = INSERT_HWORD(insn, signed_value);
+    bfd_put_32(abfd, insn ,hit_data); 
+    break;
+   case R_ILOHALF: 
+    insn = bfd_get_32(abfd, hit_data); 
+    unsigned_value = EXTRACT_HWORD(insn);
+    unsigned_value +=  sym_value + reloc_entry->addend;
+    insn = INSERT_HWORD(insn, unsigned_value);
+    bfd_put_32(abfd, insn, hit_data); 
+    break;
+   case R_IHIHALF:
+    insn = bfd_get_32(abfd, hit_data); 
+    /* consth, part 1 
+       Just get the symbol value that is referenced */
+    part1_consth_active = true;
+    part1_consth_value = sym_value + reloc_entry->addend;
+    /* Don't modify insn until R_IHCONST */
+    break;
+   case R_IHCONST:	
+    insn = bfd_get_32(abfd, hit_data); 
+    /* consth, part 2 
+       Now relocate the reference */
+    if (part1_consth_active == false) {
+      *error_message = (char *) _("Missing IHIHALF");
+      return(bfd_reloc_dangerous);
+    }
+    /* sym_ptr_ptr = r_symndx, in coff_slurp_reloc_table() */
+    unsigned_value = 0;		/*EXTRACT_HWORD(insn) << 16;*/
+    unsigned_value += reloc_entry->addend; /* r_symndx */
+    unsigned_value += part1_consth_value;
+    unsigned_value = unsigned_value >> 16;
+    insn = INSERT_HWORD(insn, unsigned_value);
+    part1_consth_active = false;
+    bfd_put_32(abfd, insn, hit_data); 
+    break;
+   case R_BYTE:
+    insn = bfd_get_8(abfd, hit_data); 
+    unsigned_value = insn + sym_value + reloc_entry->addend;	
+    if (unsigned_value & 0xffffff00)
+      return(bfd_reloc_overflow);
+    bfd_put_8(abfd, unsigned_value, hit_data); 
+    break;
+   case R_HWORD:
+    insn = bfd_get_16(abfd, hit_data); 
+    unsigned_value = insn + sym_value + reloc_entry->addend;	
+    if (unsigned_value & 0xffff0000)
+      return(bfd_reloc_overflow);
+    bfd_put_16(abfd, insn, hit_data); 
+    break;
+   case R_WORD:
+    insn = bfd_get_32(abfd, hit_data); 
+    insn += sym_value + reloc_entry->addend;  
+    bfd_put_32(abfd, insn, hit_data);
+    break;
+   default:
+    *error_message = _("Unrecognized reloc");
+    return (bfd_reloc_dangerous);
+  }
+
+
+  return(bfd_reloc_ok);	
+}
+
+/*      type	   rightshift
+		       size
+			  bitsize
+			       pc-relative
+				     bitpos
+					 absolute
+					     complain_on_overflow
+						  special_function
+						    relocation name
+							       partial_inplace 
+								      src_mask
+*/
+
+/*FIXME: I'm not real sure about this table */
+static reloc_howto_type howto_table[] = 
+{
+  {R_ABS,     0, 3, 32, false, 0, complain_overflow_bitfield,a29k_reloc,"ABS",     true, 0xffffffff,0xffffffff, false},
+  {1},  {2},  {3},   {4},  {5},  {6},  {7},  {8},  {9}, {10},
+  {11}, {12}, {13}, {14}, {15}, {16}, {17}, {18}, {19}, {20},
+  {21}, {22}, {23},
+  {R_IREL,    0, 3, 32, true,  0, complain_overflow_signed,a29k_reloc,"IREL",    true, 0xffffffff,0xffffffff, false},
+  {R_IABS,    0, 3, 32, false, 0, complain_overflow_bitfield, a29k_reloc,"IABS",    true, 0xffffffff,0xffffffff, false},
+  {R_ILOHALF, 0, 3, 16, true,  0, complain_overflow_signed, a29k_reloc,"ILOHALF", true, 0x0000ffff,0x0000ffff, false},
+  {R_IHIHALF, 0, 3, 16, true,  16, complain_overflow_signed, a29k_reloc,"IHIHALF", true, 0xffff0000,0xffff0000, false},
+  {R_IHCONST, 0, 3, 16, true,  0, complain_overflow_signed, a29k_reloc,"IHCONST", true, 0xffff0000,0xffff0000, false},
+  {R_BYTE,    0, 0, 8, false, 0, complain_overflow_bitfield, a29k_reloc,"BYTE",    true, 0x000000ff,0x000000ff, false},
+  {R_HWORD,   0, 1, 16, false, 0, complain_overflow_bitfield, a29k_reloc,"HWORD",   true, 0x0000ffff,0x0000ffff, false},
+  {R_WORD,    0, 2, 32, false, 0, complain_overflow_bitfield, a29k_reloc,"WORD",    true, 0xffffffff,0xffffffff, false},
+};
+
+#define BADMAG(x) A29KBADMAG(x)
+
+#define RELOC_PROCESSING(relent, reloc, symbols, abfd, section) \
+ reloc_processing(relent, reloc, symbols, abfd, section)
+
+static void
+reloc_processing (relent,reloc, symbols, abfd, section)
+     arelent *relent;
+     struct internal_reloc *reloc;
+     asymbol **symbols;
+     bfd *abfd;
+     asection *section;
+{
+    static bfd_vma ihihalf_vaddr = (bfd_vma) -1;
+
+    relent->address = reloc->r_vaddr;		
+    relent->howto = howto_table + reloc->r_type;
+    if (reloc->r_type == R_IHCONST) 
+    {		
+      /* The address of an R_IHCONST should always be the address of
+	 the immediately preceding R_IHIHALF.  relocs generated by gas
+	 are correct, but relocs generated by High C are different (I
+	 can't figure out what the address means for High C).  We can
+	 handle both gas and High C by ignoring the address here, and
+	 simply reusing the address saved for R_IHIHALF.  */
+        if (ihihalf_vaddr == (bfd_vma) -1)
+	  abort ();
+	relent->address = ihihalf_vaddr;
+	ihihalf_vaddr = (bfd_vma) -1;
+	relent->addend = reloc->r_symndx;		
+	relent->sym_ptr_ptr= bfd_abs_section_ptr->symbol_ptr_ptr;
+    }
+    else 
+    {
+      asymbol *ptr;
+      relent->sym_ptr_ptr = symbols + obj_convert(abfd)[reloc->r_symndx];
+
+      ptr = *(relent->sym_ptr_ptr);
+
+      if (ptr 
+	  && bfd_asymbol_bfd(ptr) == abfd		
+
+	  && ((ptr->flags & BSF_OLD_COMMON)== 0))	
+      {						
+	  relent->addend = 0;
+      }						
+      else
+      {					
+	  relent->addend = 0;			
+      }			
+      relent->address-= section->vma;
+      if (reloc->r_type == R_IHIHALF)
+	ihihalf_vaddr = relent->address;
+      else if (ihihalf_vaddr != (bfd_vma) -1)
+	abort ();
+  }
+}
+
+/* The reloc processing routine for the optimized COFF linker.  */
+
+static boolean
+coff_a29k_relocate_section (output_bfd, info, input_bfd, input_section,
+			    contents, relocs, syms, sections)
+     bfd *output_bfd;
+     struct bfd_link_info *info;
+     bfd *input_bfd;
+     asection *input_section;
+     bfd_byte *contents;
+     struct internal_reloc *relocs;
+     struct internal_syment *syms;
+     asection **sections;
+{
+  struct internal_reloc *rel;
+  struct internal_reloc *relend;
+  boolean hihalf;
+  bfd_vma hihalf_val;
+
+  /* If we are performing a relocateable link, we don't need to do a
+     thing.  The caller will take care of adjusting the reloc
+     addresses and symbol indices.  */
+  if (info->relocateable)
+    return true;
+
+  hihalf = false;
+  hihalf_val = 0;
+
+  rel = relocs;
+  relend = rel + input_section->reloc_count;
+  for (; rel < relend; rel++)
+    {
+      long symndx;
+      bfd_byte *loc;
+      struct coff_link_hash_entry *h;
+      struct internal_syment *sym;
+      asection *sec;
+      bfd_vma val;
+      boolean overflow;
+      unsigned long insn;
+      long signed_value;
+      unsigned long unsigned_value;
+      bfd_reloc_status_type rstat;
+
+      symndx = rel->r_symndx;
+      loc = contents + rel->r_vaddr - input_section->vma;
+
+      if (symndx == -1 || rel->r_type == R_IHCONST)
+	h = NULL;
+      else
+	h = obj_coff_sym_hashes (input_bfd)[symndx];
+
+      sym = NULL;
+      sec = NULL;
+      val = 0;
+
+      /* An R_IHCONST reloc does not have a symbol.  Instead, the
+         symbol index is an addend.  R_IHCONST is always used in
+         conjunction with R_IHHALF.  */
+      if (rel->r_type != R_IHCONST)
+	{
+	  if (h == NULL)
+	    {
+	      if (symndx == -1)
+		sec = bfd_abs_section_ptr;
+	      else
+		{
+		  sym = syms + symndx;
+		  sec = sections[symndx];
+		  val = (sec->output_section->vma
+			 + sec->output_offset
+			 + sym->n_value
+			 - sec->vma);
+		}
+	    }
+	  else
+	    {
+	      if (h->root.type == bfd_link_hash_defined
+		  || h->root.type == bfd_link_hash_defweak)
+		{
+		  sec = h->root.u.def.section;
+		  val = (h->root.u.def.value
+			 + sec->output_section->vma
+			 + sec->output_offset);
+		}
+	      else
+		{
+		  if (! ((*info->callbacks->undefined_symbol)
+			 (info, h->root.root.string, input_bfd, input_section,
+			  rel->r_vaddr - input_section->vma)))
+		    return false;
+		}
+	    }
+
+	  if (hihalf)
+	    {
+	      if (! ((*info->callbacks->reloc_dangerous)
+		     (info, _("missing IHCONST reloc"), input_bfd,
+		      input_section, rel->r_vaddr - input_section->vma)))
+		return false;
+	      hihalf = false;
+	    }
+	}
+
+      overflow = false;
+
+      switch (rel->r_type)
+	{
+	default:
+	  bfd_set_error (bfd_error_bad_value);
+	  return false;
+
+	case R_IREL:
+	  insn = bfd_get_32 (input_bfd, loc);
+
+	  /* Extract the addend.  */
+	  signed_value = EXTRACT_HWORD (insn);
+	  signed_value = SIGN_EXTEND_HWORD (signed_value);
+	  signed_value <<= 2;
+
+	  /* Unfortunately, there are two different versions of COFF
+	     a29k.  In the original AMD version, the value stored in
+	     the field for the R_IREL reloc is a simple addend.  In
+	     the GNU version, the value is the negative of the address
+	     of the reloc within section.  We try to cope here by
+	     assuming the AMD version, unless the addend is exactly
+	     the negative of the address; in the latter case we assume
+	     the GNU version.  This means that something like
+	         .text
+		 nop
+		 jmp i-4
+	     will fail, because the addend of -4 will happen to equal
+	     the negative of the address within the section.  The
+	     compiler will never generate code like this.
+
+	     At some point in the future we may want to take out this
+	     check.  */
+
+	  if (signed_value == - (long) (rel->r_vaddr - input_section->vma))
+	    signed_value = 0;
+
+	  /* Determine the destination of the jump.  */
+	  signed_value += val;
+
+	  if ((signed_value & ~0x3ffff) == 0)
+	    {
+	      /* We can use an absolute jump.  */
+	      insn |= (1 << 24);
+	    }
+	  else
+	    {
+	      /* Make the destination PC relative.  */
+	      signed_value -= (input_section->output_section->vma
+			       + input_section->output_offset
+			       + (rel->r_vaddr - input_section->vma));
+	      if (signed_value > 0x1ffff || signed_value < - 0x20000)
+		{
+		  overflow = true;
+		  signed_value = 0;
+		}
+	    }
+
+	  /* Put the adjusted value back into the instruction.  */
+	  signed_value >>= 2;
+	  insn = INSERT_HWORD (insn, signed_value);
+
+	  bfd_put_32 (input_bfd, (bfd_vma) insn, loc);
+
+	  break;
+
+	case R_ILOHALF:
+	  insn = bfd_get_32 (input_bfd, loc);
+	  unsigned_value = EXTRACT_HWORD (insn);
+	  unsigned_value += val;
+	  insn = INSERT_HWORD (insn, unsigned_value);
+	  bfd_put_32 (input_bfd, insn, loc);
+	  break;
+
+	case R_IHIHALF:
+	  /* Save the value for the R_IHCONST reloc.  */
+	  hihalf = true;
+	  hihalf_val = val;
+	  break;
+
+	case R_IHCONST:
+	  if (! hihalf)
+	    {
+	      if (! ((*info->callbacks->reloc_dangerous)
+		     (info, _("missing IHIHALF reloc"), input_bfd,
+		      input_section, rel->r_vaddr - input_section->vma)))
+		return false;
+	      hihalf_val = 0;
+	    }
+
+	  insn = bfd_get_32 (input_bfd, loc);
+	  unsigned_value = rel->r_symndx + hihalf_val;
+	  unsigned_value >>= 16;
+	  insn = INSERT_HWORD (insn, unsigned_value);
+	  bfd_put_32 (input_bfd, (bfd_vma) insn, loc);
+
+	  hihalf = false;
+
+	  break;
+
+	case R_BYTE:
+	case R_HWORD:
+	case R_WORD:
+	  rstat = _bfd_relocate_contents (howto_table + rel->r_type,
+					  input_bfd, val, loc);
+	  if (rstat == bfd_reloc_overflow)
+	    overflow = true;
+	  else if (rstat != bfd_reloc_ok)
+	    abort ();
+	  break;
+	}
+
+      if (overflow)
+	{
+	  const char *name;
+	  char buf[SYMNMLEN + 1];
+
+	  if (symndx == -1)
+	    name = "*ABS*";
+	  else if (h != NULL)
+	    name = h->root.root.string;
+	  else if (sym == NULL)
+	    name = "*unknown*";
+	  else if (sym->_n._n_n._n_zeroes == 0
+		   && sym->_n._n_n._n_offset != 0)
+	    name = obj_coff_strings (input_bfd) + sym->_n._n_n._n_offset;
+	  else
+	    {
+	      strncpy (buf, sym->_n._n_name, SYMNMLEN);
+	      buf[SYMNMLEN] = '\0';
+	      name = buf;
+	    }
+
+	  if (! ((*info->callbacks->reloc_overflow)
+		 (info, name, howto_table[rel->r_type].name, (bfd_vma) 0,
+		  input_bfd, input_section,
+		  rel->r_vaddr - input_section->vma)))
+	    return false;
+	}
+    }     
+
+  return true;
+}
+
+#define coff_relocate_section coff_a29k_relocate_section
+
+/* We don't want to change the symndx of a R_IHCONST reloc, since it
+   is actually an addend, not a symbol index at all.  */
+
+/*ARGSUSED*/
+static boolean
+coff_a29k_adjust_symndx (obfd, info, ibfd, sec, irel, adjustedp)
+     bfd *obfd;
+     struct bfd_link_info *info;
+     bfd *ibfd;
+     asection *sec;
+     struct internal_reloc *irel;
+     boolean *adjustedp;
+{
+  if (irel->r_type == R_IHCONST)
+    *adjustedp = true;
+  else
+    *adjustedp = false;
+  return true;
+}
+
+#define coff_adjust_symndx coff_a29k_adjust_symndx
+
+#include "coffcode.h"
+
+const bfd_target a29kcoff_big_vec =
+{
+  "coff-a29k-big",		/* name */
+  bfd_target_coff_flavour,
+  BFD_ENDIAN_BIG,		/* data byte order is big */
+  BFD_ENDIAN_BIG,		/* header byte order is big */
+
+  (HAS_RELOC | EXEC_P |		/* object flags */
+   HAS_LINENO | HAS_DEBUG |
+   HAS_SYMS | HAS_LOCALS | WP_TEXT),
+
+  (SEC_HAS_CONTENTS | SEC_ALLOC /* section flags */
+   | SEC_LOAD | SEC_RELOC  
+   | SEC_READONLY ),
+  '_',				/* leading underscore */
+  '/',				/* ar_pad_char */
+  15,				/* ar_max_namelen */
+  /* data */
+  bfd_getb64, bfd_getb_signed_64, bfd_putb64,
+     bfd_getb32, bfd_getb_signed_32,   bfd_putb32,
+     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
+  /* hdrs */
+  bfd_getb64, bfd_getb_signed_64, bfd_putb64,
+     bfd_getb32, bfd_getb_signed_32,   bfd_putb32,
+     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
+
+ {
+	    
+   _bfd_dummy_target,
+   coff_object_p,
+   bfd_generic_archive_p,
+   _bfd_dummy_target
+  },
+ {
+   bfd_false,
+   coff_mkobject,
+   _bfd_generic_mkarchive,
+   bfd_false
+  },
+ {
+   bfd_false,
+   coff_write_object_contents,
+   _bfd_write_archive_contents,
+   bfd_false
+  },
+
+     BFD_JUMP_TABLE_GENERIC (coff),
+     BFD_JUMP_TABLE_COPY (coff),
+     BFD_JUMP_TABLE_CORE (_bfd_nocore),
+     BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
+     BFD_JUMP_TABLE_SYMBOLS (coff),
+     BFD_JUMP_TABLE_RELOCS (coff),
+     BFD_JUMP_TABLE_WRITE (coff),
+     BFD_JUMP_TABLE_LINK (coff),
+     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
+
+  COFF_SWAP_TABLE
+ };