Initial revision

1 files changed, 244 insertions, 0 deletions

diff --git a/bfd/coff-a29k.c b/bfd/coff-a29k.c
new file mode 100644
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+++ b/bfd/coff-a29k.c
@@ -0,0 +1,244 @@
+/* Copyright (C) 1990, 1991 Free Software Foundation, Inc.
+   Contributed by David Wood at New York University 7/8/91
+
+This file is part of BFD, the Binary File Diddler.
+
+BFD 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 1, or (at your option)
+any later version.
+
+BFD 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 BFD; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+
+/* $Id$ */
+
+#define A29K 1
+
+#include <ansidecl.h>
+#include <sysdep.h>
+#include "bfd.h"
+#include "libbfd.h"
+#include "obstack.h"
+#include "amdcoff.h"
+#include "internalcoff.h"
+#include "libcoff.h"
+
+#define INSERT_HWORD(WORD,HWORD)	\
+	(((WORD) & 0xff00ff00) | (((HWORD) & 0xff00) << 8) | ((HWORD)& 0xff))
+#define EXTRACT_HWORD(WORD) 	(((WORD) & 0x00ff0000) >> 8) | ((WORD) & 0xff)
+
+/* Provided the symbol, returns the value reffed */
+static  long
+get_symbol_value(symbol)       
+asymbol *symbol;
+{                                             
+  long relocation = 0;
+
+  if (symbol != (asymbol *)NULL) {              
+    if (symbol->flags & BSF_FORT_COMM) {        
+      relocation = 0;                           
+    } else {                                      
+      relocation = symbol->value;               
+    }                                           
+    if (symbol->section != (asection *)NULL) {    
+      relocation += symbol->section->output_section->vma +
+        	symbol->section->output_offset;           
+    }                                             
+  }
+  return(relocation);
+}
+
+static bfd_reloc_status_enum_type
+a29k_reloc(abfd, reloc_entry, symbol_in, data, input_section)
+bfd *abfd;
+arelent *reloc_entry;
+asymbol *symbol_in;
+unsigned char *data;
+asection *input_section;
+{
+	static unsigned long part1_consth_active=0;
+	static unsigned long part1_consth_value;
+	unsigned long insn, value, sym_value; 
+	unsigned short r_type;
+/*  	bfd_reloc_status_enum_type result;*/
+/*  	coff_symbol_type *cs = coffsymbol(symbol_in);*/
+	
+	r_type = reloc_entry->howto->type;
+
+        /* FIXME: Do we need to check for partial linking here */
+        if (symbol_in && (symbol_in->flags & BSF_UNDEFINED)) {
+		/* Keep the state machine happy in case we're called again */
+		if (r_type == R_IHIHALF) {
+			part1_consth_active = 1;
+			part1_consth_value  = 0;
+		}
+                return(bfd_reloc_undefined);
+	}
+
+	if ((part1_consth_active) && (r_type != R_IHCONST)) {
+		fprintf(stderr,"Relocation problem : ");
+		fprintf(stderr,"Missing IHCONST in module %s\n",abfd->filename);
+		part1_consth_active = 0;
+		return(bfd_reloc_dangerous);
+	}
+
+	insn = bfd_get_32(abfd, data + reloc_entry->address); 
+	sym_value = get_symbol_value(symbol_in);
+
+	switch (r_type) {
+	case R_IREL: 	
+		value = EXTRACT_HWORD(insn) << 2;
+		value +=  sym_value + reloc_entry->addend;
+		if (value <= 0x3ffff) {		/* Absolute jmp/call */
+			insn |= 0x01000000;	/* Make it absolute */
+			/* FIXME: Should we change r_type to R_IABS */
+		} else {			/* Relative jmp/call */
+			value -= reloc_entry->address;
+			if (value > 0x3ffff) {
+				fprintf(stderr,"Relocation problem : ");
+				fprintf(stderr,"Jmp/call too far; to %d from %s\n",
+					symbol_in->name,abfd->filename); 
+				return(bfd_reloc_outofrange);
+			}
+		}
+		value >>= 2;
+		insn = INSERT_HWORD(insn,value);
+		break;
+	case R_ILOHALF: 
+		value = EXTRACT_HWORD(insn);
+		value +=  sym_value + reloc_entry->addend;
+		insn = INSERT_HWORD(insn,value);
+		break;
+	case R_IHIHALF: 	/* consth, part 1 */
+		/* Just get the symbol value that is referenced */
+		part1_consth_active = 1;
+		part1_consth_value = sym_value + reloc_entry->addend;
+		return(bfd_reloc_ok);	/* Don't modify insn until R_IHCONST */
+		break;
+	case R_IHCONST: 	/* consth, part 2 */
+		/* Now relocate the reference */
+		if (!part1_consth_active) {
+			fprintf(stderr,"Relocation problem : ");
+			fprintf(stderr,"IHIHALF missing in module %s\n",
+				abfd->filename); 
+			part1_consth_active = 0;
+			return(bfd_reloc_dangerous);
+		}
+		/* sym_ptr_ptr = r_symndx, in coff_slurp_reloc_table() */
+		value = (unsigned int)reloc_entry->addend; /* r_symndx */
+		value += part1_consth_value;
+		value >>= 16;
+		insn = INSERT_HWORD(insn,value);
+		part1_consth_active = 0;
+		break;
+	case R_BYTE:
+		value = (insn >> 24) + sym_value + reloc_entry->addend;	
+		if (value & 0xffffff00) {
+			fprintf(stderr,"Relocation problem : ");
+			fprintf(stderr,"byte value too large in module %s\n",
+				abfd->filename); 
+			return(bfd_reloc_overflow);
+		}
+		insn = (insn & 0x00ffffff) | (value << 24);
+		break;
+	case R_HWORD:
+		value = (insn >> 16) + sym_value + reloc_entry->addend;	
+		if (value & 0xffff0000) {
+			fprintf(stderr,"Relocation problem : ");
+			fprintf(stderr,"hword value too large in module %s\n",
+				abfd->filename); 
+			return(bfd_reloc_overflow);
+		}
+		insn = (insn & 0x0000ffff) | (value<<16); 
+		break;
+	case R_WORD:
+		insn += sym_value + reloc_entry->addend;  
+		break;
+	default:
+		fprintf(stderr,"Relocation problem : ");
+		fprintf(stderr,"Unrecognized reloc type %d, in module %s\n",
+				r_type,abfd->filename); 
+		return (bfd_reloc_dangerous);
+	}
+
+	bfd_put_32(abfd, insn, data+reloc_entry->address);
+	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 */
+#define NA	0	/* Obsolete fields, via the documentation */
+static reloc_howto_type howto_table[] = 
+{
+  {R_ABS,     0, 3, NA, false, NA, NA, true,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, NA, true,  NA, NA, true,a29k_reloc,"IREL",    true, 0xffffffff,0xffffffff, false},
+  {R_IABS,    0, 3, NA, false, NA, NA, true,a29k_reloc,"IABS",    true, 0xffffffff,0xffffffff, false},
+  {R_ILOHALF, 0, 3, NA, true,  NA, NA, true,a29k_reloc,"ILOHALF", true, 0x0000ffff,0x0000ffff, false},
+  {R_IHIHALF, 0, 3, NA, true,  NA, NA, true,a29k_reloc,"IHIHALF", true, 0xffff0000,0xffff0000, false},
+  {R_IHCONST, 0, 3, NA, true,  NA, NA, true,a29k_reloc,"IHCONST", true, 0xffff0000,0xffff0000, false},
+  {R_BYTE,    0, 0, NA, false, NA, NA, true,a29k_reloc,"BYTE",    true, 0x000000ff,0x000000ff, false},
+  {R_HWORD,   0, 1, NA, false, NA, NA, true,a29k_reloc,"HWORD",   true, 0x0000ffff,0x0000ffff, false},
+  {R_WORD,    0, 2, NA, false, NA, NA, true,a29k_reloc,"WORD",    true, 0xffffffff,0xffffffff, false},
+};
+#undef NA
+
+#define BADMAG(x) A29KBADMAG(x)
+
+#include "coffcode.h"
+
+bfd_target a29kcoff_big_vec =
+{
+  "coff-a29k-big",		/* name */
+  bfd_target_coff_flavour_enum,
+  true,				/* data byte order is big */
+  true,				/* header byte order is big */
+
+  (HAS_RELOC | EXEC_P |		/* object flags */
+   HAS_LINENO | HAS_DEBUG |
+   HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT),
+
+  (SEC_HAS_CONTENTS | SEC_ALLOC /* section flags */
+	| SEC_LOAD | SEC_RELOC  
+	| SEC_READONLY ),
+  '/',				/* ar_pad_char */
+  15,				/* ar_max_namelen */
+
+     3,				/* minimum section alignment */
+_do_getb64, _do_putb64,  _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */
+_do_getb64, _do_putb64,  _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
+
+
+  {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
+     bfd_generic_archive_p, _bfd_dummy_target},
+  {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
+     bfd_false},
+  {bfd_false, coff_write_object_contents,	/* bfd_write_contents */
+     _bfd_write_archive_contents, bfd_false},
+
+     JUMP_TABLE(coff),
+     COFF_SWAP_TABLE
+  };
+