upstream/1.1.0_cvsrelease/1.1.0_cvs

1 files changed, 539 insertions, 0 deletions

diff --git a/gnu/usr.bin/as/config/obj-ieee.c b/gnu/usr.bin/as/config/obj-ieee.c
new file mode 100644
index 000000000000..5f74a5f8edfa
--- /dev/null
+++ b/gnu/usr.bin/as/config/obj-ieee.c
@@ -0,0 +1,539 @@
+/* obj-format for ieee-695 records.
+   Copyright (C) 1991, 1992 Free Software Foundation, Inc.
+   
+   This file is part of GAS, the GNU Assembler.
+   
+   GAS 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, or (at your option)
+   any later version.
+   
+   GAS 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 GAS; see the file COPYING.  If not, write to
+   the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+
+/* 
+  created by
+  
+  steve chamberlain steve@cygnus.com
+  */
+
+/*
+  this will hopefully become the port through which bfd and gas talk,
+  for the moment, only ieee is known to work well.
+  */
+
+#include "bfd.h"
+#include "as.h"
+#include "subsegs.h"
+#include "output-file.h"
+#include "frags.h"
+
+bfd *abfd;
+
+/* How many addresses does the .align take? */
+static relax_addressT relax_align(address, alignment)
+register relax_addressT address; /* Address now. */
+register long alignment; /* Alignment (binary). */
+{
+	relax_addressT	mask;
+	relax_addressT	new_address;
+	
+	mask = ~ ( (~0) << alignment );
+	new_address = (address + mask) & (~ mask);
+	return (new_address - address);
+} /* relax_align() */
+
+/* calculate the size of the frag chain and create a bfd section
+   to contain all of it */
+static void DEFUN(size_section,(abfd, idx),
+		  bfd *abfd AND
+		  unsigned int idx)
+{
+	asection *sec;
+	unsigned int size = 0;
+	fragS *frag = segment_info[idx].frag_root;
+	while (frag) {
+		if (frag->fr_address != size) {	
+			printf("Out of step\n");
+			size = frag->fr_address;
+		}
+		size += frag->fr_fix;
+		switch (frag->fr_type) {
+		case rs_fill:
+		case rs_org:
+			size  +=    frag->fr_offset * frag->fr_var;
+			break;
+		case rs_align:
+			size  +=   relax_align(size, frag->fr_offset);
+		}
+		frag = frag->fr_next;
+	}
+	if (size) {
+		char *name = segment_info[idx].name;
+		if (name == (char *)NULL) {
+			name = ".data";
+		}
+		segment_info[idx].user_stuff = (char *)(sec =  bfd_make_section(abfd, name));
+		/* Make it output through itself */
+		sec->output_section = sec;
+		sec->flags |= SEC_HAS_CONTENTS;
+		bfd_set_section_size(abfd, sec, size);
+	}
+}
+
+/* run through a frag chain and write out the data to go with it */
+static void DEFUN(fill_section,(abfd, idx),
+		  bfd *abfd AND
+		  unsigned int idx)
+{
+	asection *sec = segment_info[idx].user_stuff;
+	if (sec) {
+		fragS *frag = segment_info[idx].frag_root;
+		unsigned int offset = 0;
+		while (frag) {
+			unsigned int fill_size;
+			unsigned int count;
+			switch (frag->fr_type) {
+			case rs_fill:
+			case rs_align:
+			case rs_org:
+				if (frag->fr_fix) 
+				    {
+					    bfd_set_section_contents(abfd,
+								     sec,
+								     frag->fr_literal,
+								     frag->fr_address,
+								     frag->fr_fix);
+				    }
+				offset += frag->fr_fix;
+				fill_size = frag->fr_var;
+				if (fill_size)	
+				    {
+					    unsigned int off = frag->fr_fix;
+					    for (count = frag->fr_offset; count;  count--) 
+						{
+							bfd_set_section_contents(abfd, sec,
+										 frag->fr_literal +
+										 frag->fr_fix,
+										 frag->fr_address + off,
+										 fill_size);
+							off += fill_size;
+						}
+				    }
+				break;
+			default:	
+				abort();
+			}
+			frag = frag->fr_next;
+		}
+	}
+}
+
+/* Count the relocations in a chain */
+
+static unsigned int DEFUN(count_entries_in_chain,(idx),
+			  unsigned int idx)
+{
+	unsigned int nrelocs;
+	fixS *fixup_ptr;
+	
+	/* Count the relocations */
+	fixup_ptr = segment_info[idx].fix_root;
+	nrelocs = 0;
+	while (fixup_ptr != (fixS *)NULL) 
+	    {
+		    fixup_ptr = fixup_ptr->fx_next;
+		    nrelocs ++ ;
+	    }
+	return nrelocs;
+}
+
+/* output all the relocations for a section */
+void DEFUN(do_relocs_for,(idx), 
+	   unsigned int idx)
+{
+	unsigned int nrelocs;
+	arelent **reloc_ptr_vector;
+	arelent *reloc_vector;
+	asymbol **ptrs;
+	asection *section = (asection *)(segment_info[idx].user_stuff);
+	unsigned int i;
+	fixS *from;
+	if (section) {
+		nrelocs = count_entries_in_chain(idx);
+		
+		reloc_ptr_vector = (arelent**)malloc((nrelocs+1) * sizeof(arelent *));
+		reloc_vector = (arelent*)malloc(nrelocs * sizeof(arelent));
+		ptrs = (asymbol **)malloc(nrelocs * sizeof(asymbol *));
+		from = segment_info[idx].fix_root;
+		for (i = 0; i < nrelocs; i++) 
+		    {	
+			    arelent *to = reloc_vector + i;
+			    asymbol *s ;
+			    reloc_ptr_vector[i] = to;
+			    to->howto = (reloc_howto_type *)(from->fx_r_type);
+			    
+			    /* We can't represent complicated things in a reloc yet */
+			    /*	if (from->fx_addsy == 0 ||
+				from->fx_subsy != 0) abort();
+				*/
+			    s = &( from->fx_addsy->sy_symbol.sy);
+			    to->address = ((char *)( from->fx_frag->fr_address +
+						    from->fx_where)) 
+				- ((char *)(&(from->fx_frag->fr_literal)));
+			    to->addend = from->fx_offset ;
+			    /* If we know the symbol which we want to relocate to, turn this
+			       reloaction into a section relative. 
+			       
+			       If this relocation is pcrelative, and we know the
+			       destination, we still want to keep the relocation - since
+			       the linker might relax some of the bytes, but it stops
+			       being pc relative and turns into an absolute relocation.
+			       
+			       */
+			    if (s) {
+				    if ((s->flags & BSF_UNDEFINED) == 0) {
+					    to->section = s->section;
+					    to->addend +=  s->value  ;
+					    to->sym_ptr_ptr  = 0;
+					    if (to->howto->pcrel_offset) {
+						    /* This is a pcrel relocation, the addend should be adjusted */
+						    to->addend -=  to->address +1;
+					    }
+				    }
+				    else {
+					    to->section = 0;
+					    *ptrs = &(from->fx_addsy->sy_symbol.sy);
+					    to->sym_ptr_ptr = ptrs;
+					    
+					    if (to->howto->pcrel_offset) {
+						    /* This is a pcrel relocation, the addend should be adjusted */
+						    to->addend -=  to->address -1;
+					    }
+				    }
+				    
+			    }
+			    else {
+				    to->section = 0;
+			    }
+			    
+			    ptrs++;
+			    from = from->fx_next;
+		    }
+		
+		/* attatch to the section */
+		section->orelocation =  reloc_ptr_vector;
+		section->reloc_count = nrelocs; 
+		section->flags |= SEC_LOAD;
+	}  
+}
+
+/* do the symbols.. */
+static void DEFUN(do_symbols, (abfd),
+		  bfd *abfd)
+{
+	extern symbolS *symbol_rootP;
+	symbolS *ptr;
+	asymbol **symbol_ptr_vec;
+	asymbol *symbol_vec;
+	unsigned int count = 0;
+	unsigned int index;
+	
+	
+	for (ptr = symbol_rootP;
+	     ptr != (symbolS *)NULL;
+	     ptr = ptr->sy_next) 
+	    {
+		    if (SEG_NORMAL(ptr->sy_symbol.seg)) 
+			{
+				ptr->sy_symbol.sy.section =
+				    (asection *)(segment_info[ptr->sy_symbol.seg].user_stuff);
+				ptr->sy_symbol.sy.value += ptr->sy_frag->fr_address;
+				if (ptr->sy_symbol.sy.flags == 0) {
+					ptr->sy_symbol.sy.flags = BSF_LOCAL ;
+				}
+			}
+		    else {
+			    switch (ptr->sy_symbol.seg) {
+			    case  SEG_ABSOLUTE:
+				    ptr->sy_symbol.sy.flags   |= BSF_ABSOLUTE;
+				    ptr->sy_symbol.sy.section = 0;
+				    break;
+			    case SEG_UNKNOWN:
+				    ptr->sy_symbol.sy.flags = BSF_UNDEFINED ;
+				    ptr->sy_symbol.sy.section = 0;
+				    break;
+			    default:
+				    abort();
+			    }
+		    }
+		    count++;
+	    }
+	symbol_ptr_vec = (asymbol **)malloc((count+1) * sizeof(asymbol *));
+	
+	index = 0;
+	for (ptr = symbol_rootP;
+	     ptr != (symbolS *)NULL;
+	     ptr = ptr->sy_next) 
+	    {
+		    symbol_ptr_vec[index] =  &(ptr->sy_symbol.sy);
+		    index++;
+	    }
+	symbol_ptr_vec[index] =0;
+	abfd->outsymbols = symbol_ptr_vec;
+	abfd->symcount = count;
+}
+
+/* The generic as->bfd converter. Other backends may have special case
+   code */
+
+void DEFUN_VOID(bfd_as_write_hook)
+{
+	int i;
+	
+	for (i = SEG_E0; i < SEG_UNKNOWN; i++) {
+		size_section(abfd, i);
+	}
+	
+	
+	for (i = SEG_E0; i < SEG_UNKNOWN; i++)
+	    fill_section(abfd,i);
+	
+	do_symbols(abfd);
+	
+	for (i = SEG_E0; i < SEG_UNKNOWN; i++)
+	    do_relocs_for(i);
+	
+}
+
+
+
+S_GET_VALUE(x) 
+symbolS *x; 
+{
+	return x->sy_symbol.sy.value; 
+}
+
+S_SET_SEGMENT(x,y)
+symbolS *x ;
+int y;
+{ 
+	x->sy_symbol.seg = y;
+}
+
+S_IS_DEFINED(x)
+symbolS *x;
+{
+	if (SEG_NORMAL(x->sy_symbol.seg)) 
+	    {
+		    return 1;
+	    }
+	switch (x->sy_symbol.seg) 
+	    {
+	    case  SEG_UNKNOWN:
+		    return 0;
+	    default:
+		    abort(); 
+	    }
+}
+
+S_IS_EXTERNAL(x) { abort(); }
+S_GET_DESC(x) { abort()  ; }
+
+S_GET_SEGMENT(x)
+symbolS *x;
+{ return x->sy_symbol.seg;  }
+
+S_SET_EXTERNAL(x)
+symbolS *x; 
+{
+	x->sy_symbol.sy.flags |= BSF_GLOBAL | BSF_EXPORT;
+}
+
+S_SET_NAME(x,y)
+symbolS*x;
+char *y; {
+	x->sy_symbol.sy.name = y; }
+
+S_SET_VALUE(s,v)
+symbolS *s;
+long v;
+{ 
+	s->sy_symbol.sy.value = v;
+}
+
+S_GET_OTHER(x) { abort() ;}
+S_IS_DEBUG(x) { abort(); }
+
+char *segment_name() { abort(); }
+
+void obj_read_begin_hook() {  }
+
+static void obj_ieee_section(ignore)
+int ignore;
+{
+	extern char *input_line_pointer;
+	extern char is_end_of_line[];
+	char *p= input_line_pointer;
+	char *s = p;
+	int i;
+	/* Look up the name, if it doesn't exist, make it */
+	while (*p &&* p != ' ' && *p != ',' && !is_end_of_line[*p]) {
+		p++;
+	}
+	for (i = SEG_E0; i < SEG_UNKNOWN; i++) {
+		if (segment_info[i].hadone){
+			if (strncmp(segment_info[i].name, s, p-s) == 0) {
+				goto ok;
+				
+			}
+		}
+		else break;
+	}
+	if (i == SEG_UNKNOWN) {
+		as_bad("too many sections");
+		return;
+	}
+	
+	segment_info[i].hadone = 1;
+	segment_info[i].name = malloc(p-s + 1);
+	memcpy(segment_info[i].name, s, p-s);
+	segment_info[i].name[p-s] = 0; 
+ ok:
+	subseg_new(i,0);
+	while (!is_end_of_line[*p]) 
+	    p++;
+	input_line_pointer = p;
+	
+}
+
+
+void cons();
+void s_ignore();
+
+
+/*
+ *			stringer()
+ *
+ * We read 0 or more ',' seperated, double-quoted strings.
+ *
+ * Caller should have checked need_pass_2 is FALSE because we don't check it.
+ */
+
+void stringer();
+void s_globl();
+const pseudo_typeS obj_pseudo_table[] = 
+{ 
+	{"section", obj_ieee_section, 0},
+	{"data.b", cons, 1},
+	{"data.w", cons, 2},
+	{"data.l", cons, 4},
+	{"export", s_globl, 0},
+	{"option", s_ignore, 0},
+	{"end", s_ignore, 0},
+	{"import", s_ignore, 0},
+	{"sdata", stringer, 0},
+	0,
+	
+};
+
+
+
+void obj_symbol_new_hook(symbolP)
+symbolS *symbolP;
+{
+	symbolP->sy_symbol.sy.the_bfd = abfd;
+}
+
+
+
+
+
+#if 1
+extern void DEFUN_VOID(write_object_file)
+{
+	int i;
+	struct frchain *frchain_ptr; 
+	struct frag *frag_ptr;
+	
+	abfd = bfd_openw(out_file_name, "ieee");
+	
+	if (abfd == 0) {
+		as_perror ("FATAL: Can't create %s", out_file_name);
+		exit(42);
+	}
+	bfd_set_format(abfd, bfd_object);
+	bfd_set_arch_mach(abfd, bfd_arch_h8300, 0);
+	subseg_new(1,0);
+	subseg_new(2,0);
+	subseg_new(3,0);
+	for (frchain_ptr = frchain_root;
+	     frchain_ptr != (struct frchain *)NULL; 
+	     frchain_ptr = frchain_ptr->frch_next) {
+		/* Run through all the sub-segments and align them up. Also close any
+		   open frags. We tack a .fill onto the end of the frag chain so
+		   that any .align's size can be worked by looking at the next
+		   frag */
+		
+		subseg_new(frchain_ptr->frch_seg, frchain_ptr->frch_subseg);
+#define SUB_SEGMENT_ALIGN 2
+		frag_align(SUB_SEGMENT_ALIGN,0);
+		frag_wane(frag_now);
+		frag_now->fr_fix = 0;
+		know( frag_now->fr_next == NULL );
+	}
+	
+	/* Now build one big frag chain for each segment, linked through
+	   fr_next. */
+	for (i = SEG_E0; i < SEG_UNKNOWN; i++)
+	    { 
+		    
+		    fragS ** prev_frag_ptr_ptr ;
+		    struct frchain *next_frchain_ptr;
+		    
+		    /*	struct frag **head_ptr = segment_info[i].frag_root;*/
+		    
+		    segment_info[i].frag_root =  segment_info[i].frchainP->frch_root;
+#if 0
+		    /* Im not sure what this is for */
+		    for (frchain_ptr = segment_info[i].frchainP->frch_root;
+			 frchain_ptr != (struct frchain *)NULL;
+			 frchain_ptr = frchain_ptr->frch_next)
+			{
+				*head_ptr = frchain_ptr;
+				head_ptr = &frchain_ptr->next;
+			}
+		    
+		    
+#endif
+	    }
+	
+	for (i = SEG_E0; i < SEG_UNKNOWN; i++) {
+		relax_segment(segment_info[i].frag_root, i);
+	}
+	
+	/* Now the addresses of the frags are correct within the segment */
+	
+	bfd_as_write_hook();
+	bfd_close(abfd);
+}
+
+#endif
+
+H_SET_TEXT_SIZE(a,b) { abort(); }
+H_GET_TEXT_SIZE()  { abort(); }
+H_SET_BSS_SIZE() { abort(); }
+H_SET_STRING_SIZE() { abort(); }
+H_SET_RELOCATION_SIZE() { abort(); }
+H_SET_MAGIC_NUMBER() { abort(); }
+H_GET_FILE_SIZE() { abort(); }
+H_GET_TEXT_RELOCATION_SIZE() { abort(); }
+
+/* end of obj-ieee.c */