Support for linking and loading at different places:

* ldlex.l: Add "AT" keyword.
	* ldgram.y: Cleanup, and parse AT.
	* ldlang.c (print_output_section_statement): Print output address
	of section in map. (lang_size_sections): Fill sections' lma with
	load address.
	* ldlang.h (lang_output_section_statement_type): Add load_base
	information.

ld/ChangeLog

@@ -1,5 +1,15 @@
 Tue Mar 30 09:40:25 1993  Steve Chamberlain  (sac@thepub.cygnus.com)
 
+	Support for linking and loading at different places:
+
+	* ldlex.l: Add "AT" keyword.
+	* ldgram.y: Cleanup, and parse AT.
+	* ldlang.c (print_output_section_statement): Print output address
+	of section in map. (lang_size_sections): Fill sections' lma with
+	load address.
+	* ldlang.h (lang_output_section_statement_type): Add load_base
+	information.
+
 	* ldindr.c (add_indirect): Keep more information in the alias
 	symbol chain.
 	* ldlang.c (wild_doit):  Don't inherit NEVER_LOAD section

ld/ldgram.y

@@ -54,11 +54,11 @@ lang_memory_region_type *region;
 
 lang_memory_region_type *lang_memory_region_lookup();
 lang_output_section_statement_type *lang_output_section_statement_lookup();
-
+etree_type *lang_atin();
 #ifdef __STDC__
 
 void lang_add_data(int type, union etree_union *exp);
-void lang_enter_output_section_statement(char *output_section_statement_name, etree_type *address_exp, int flags, bfd_vma block_value,etree_type*,etree_type*);
+void lang_enter_output_section_statement(char *output_section_statement_name, etree_type *address_exp, int flags, bfd_vma block_value,etree_type*,etree_type*, etree_type*);
 
 #else
 
@@ -103,7 +103,7 @@ struct sec *section;
   
 }
 
-%type <etree> exp  opt_exp_with_type  mustbe_exp
+%type <etree> exp  opt_exp_with_type  mustbe_exp opt_at
 %type <integer> fill_opt
 %type <name> memspec_opt
 %token <integer> INT  
@@ -138,6 +138,7 @@ struct sec *section;
 %token NOLOAD DSECT COPY INFO OVERLAY
 %token NAME DEFINED TARGET_K SEARCH_DIR MAP ENTRY 
 %token OPTION_e OPTION_c OPTION_noinhibit_exec OPTION_s OPTION_S OPTION_sort_common
+%token OPTION_EB OPTION_EL
 %token OPTION_format  OPTION_F OPTION_u OPTION_Bstatic OPTION_N
 %token <integer> SIZEOF NEXT ADDR 
 %token OPTION_d OPTION_dc OPTION_dp OPTION_x OPTION_X OPTION_defsym
@@ -149,7 +150,7 @@ struct sec *section;
 %token OPTION_Ur 
 %token ORIGIN FILL OPTION_g
 %token LENGTH    CREATE_OBJECT_SYMBOLS INPUT OUTPUT  CONSTRUCTORS
-%token OPTION_RETAIN_SYMBOLS_FILE ALIGNMOD
+%token OPTION_RETAIN_SYMBOLS_FILE ALIGNMOD AT
 
 %type <token> assign_op 
 
@@ -196,9 +197,9 @@ command_line_option:
 		write_map = true;
 		config.map_filename = $2;
 		}
-	|	OPTION_M {
+	|	OPTION_M 
+		{
 		  config.map_filename = "-";
-			    
 		}
 	|	OPTION_n {
 			config.magic_demand_paged = false;
@@ -335,6 +336,18 @@ command_line_option:
 			}
 	|	OPTION_RETAIN_SYMBOLS_FILE filename
 		{ lang_add_keepsyms_file ($2); }
+	|	OPTION_EB
+		{
+		  /* FIXME: This is currently ignored.  It means
+		     ``produce a big-endian object file''.  It could
+		     be used to select an output format.  */
+		}
+	|	OPTION_EL
+		{
+		  /* FIXME: This is currently ignored.  It means
+		     ``produce a little-endian object file''.  It could
+		     be used to select an output format.  */
+		}
 	| '-' NAME
 		 { info("%P%F Unrecognized option -%s\n", $2);  }
 
@@ -528,33 +541,36 @@ input_section_spec:
 	;
 
 statement:
-		statement assignment end
+	  	assignment end
-	|	statement CREATE_OBJECT_SYMBOLS
+	|	CREATE_OBJECT_SYMBOLS
+		{
+ 		lang_add_attribute(lang_object_symbols_statement_enum); 
+	      	}
+        |	';'
+        |	CONSTRUCTORS
 		{
  		
-lang_add_attribute(lang_object_symbols_statement_enum); }
+		  lang_add_attribute(lang_constructors_statement_enum); 
-        |	statement ';'
+		}
-        |	statement CONSTRUCTORS
+	| input_section_spec
+        | length '(' exp ')'
         	        {
- 		
+			lang_add_data($1,$3);
-lang_add_attribute(lang_constructors_statement_enum); }
-
-	|	statement input_section_spec
-        | statement length '(' exp ')'
-        	        {
-			lang_add_data($2,$4);
 			}
   
-	|	statement FILL '(' exp ')'
+	| FILL '(' exp ')'
 			{
 			  lang_add_fill
-			    (exp_get_value_int($4,
+			    (exp_get_value_int($3,
 					       0,
 					       "fill value",
-					
 					       lang_first_phase_enum));
 			}
-	|
+	;
+
+statement_list:
+		statement_list statement
+  	|  	statement
 	;
   
 length:
@@ -773,19 +789,23 @@ exp	:
 	;
 
 
-
+opt_at:
+		AT '(' exp ')' { $$ = $3; }
+	|	{ $$ = 0; }
+	;
 
 section:	NAME 		{ ldlex_expression(); }
-		opt_exp_with_type 	{ ldlex_popstate(); }
+		opt_exp_with_type 
+		opt_at   	{ ldlex_popstate(); }
 		'{'
 			{
-		lang_enter_output_section_statement($1,$3,typebits,0,0,0);
+			lang_enter_output_section_statement($1,$3,typebits,0,0,0,$4);
 			}
-	       statement 	
+		statement_list 	
  		'}' {ldlex_expression();} fill_opt memspec_opt
 		{
 		  ldlex_popstate();
-		  lang_leave_output_section_statement($10, $11);
+		  lang_leave_output_section_statement($11, $12);
 		}
 opt_comma
 
@@ -804,7 +824,8 @@ type:
 opt_exp_with_type:
 		exp ':'			{ $$ = $1; typebits =0;}
 	|	exp '(' type ')' ':' 	{ $$ = $1; }
-	|	':'	{ $$= (etree_type *)NULL; typebits = 0}
+	|	':'			{ $$= (etree_type *)NULL; typebits = 0; }
+	|	'(' type ')' ':'	{ $$= (etree_type *)NULL;  }
 	;
 
 memspec_opt:

ld/ldlang.c

@@ -95,6 +95,10 @@ extern ld_config_type config;
 extern boolean had_script;
 extern boolean write_map;
 
+
+etree_type *base; /* Relocation base - or null */
+
+
 #ifdef __STDC__
 #define cat(a,b) a##b
 #else
@@ -1091,6 +1095,12 @@ DEFUN (print_output_section_statement, (output_section_statement),
     fprintf (config.map_file, "No attached output section");
   }
   print_nl ();
+  if (output_section_statement->load_base)
+    {
+      int b = exp_get_value_int(output_section_statement->load_base,
+				0, "output base", lang_final_phase_enum);
+      printf("Output address   %08x\n", b);
+    }
   if (output_section_statement->section_alignment >= 0
       || output_section_statement->section_alignment >= 0) 
   {
@@ -1583,6 +1593,11 @@ DEFUN (lang_size_sections, (s, output_section_statement, prev, fill,
 
 	 dot = align_power (dot, os->bfd_section->alignment_power);
 	 bfd_set_section_vma (0, os->bfd_section, dot);
+	 
+	 if (os->load_base) {
+	   os->bfd_section->lma 
+	     = exp_get_value_int(os->load_base, 0,"load base", lang_final_phase_enum);
+	 }
        }
 
 
@@ -1609,9 +1624,9 @@ DEFUN (lang_size_sections, (s, output_section_statement, prev, fill,
        {
 	 os->region->current = dot;
 	 /* Make sure this isn't silly */
-	 if (os->region->current >
+	 if (( os->region->current
-	     os->region->origin +
+              > os->region->origin + os->region->length)
-	     os->region->length)
+	     || ( os->region->origin > os->region->current ))
 	   {
 	     einfo ("%X%P: Region %s is full (%B section %s)\n",
 		    os->region->name,
@@ -2319,13 +2334,14 @@ DEFUN (lang_enter_output_section_statement,
 	address_exp,
 	flags,
 	block_value, 
-	align, subalign),
+	align, subalign, base),
        char *output_section_statement_name AND
        etree_type * address_exp AND
        int flags AND
        bfd_vma block_value AND
        etree_type *align AND
-       etree_type *subalign)
+       etree_type *subalign AND
+       etree_type *base)
 {
   lang_output_section_statement_type *os;
 
@@ -2361,8 +2377,11 @@ DEFUN (lang_enter_output_section_statement,
   os->section_alignment = topower(
    exp_get_value_int(align, -1,
 		     "section alignment", 0));
+
+  os->load_base = base;
 }
 
+
 void
 DEFUN_VOID (lang_final)
 {
@@ -2765,3 +2784,4 @@ DEFUN (lang_add_output_format, (format),
 {
   output_target = format;
 }
+

ld/ldlex.l

@@ -184,6 +184,12 @@ NOCFILENAMECHAR	[_a-zA-Z0-9\/\.\-\_\+\$\:\[\]\\\~]
 
 <COMMAND>"-retain-symbols-file"	{ return OPTION_RETAIN_SYMBOLS_FILE; }
 
+<COMMAND>"-EB"          		{
+				 return OPTION_EB;
+			       }
+<COMMAND>"-EL"         		{
+				 return OPTION_EL;
+			       }
 <MRI,EXPRESSION>"$"([0-9A-Fa-f])+ {
   				yylval.integer = strtoul(yytext+1, 0,16);
 				return INT;
@@ -208,7 +214,7 @@ NOCFILENAMECHAR	[_a-zA-Z0-9\/\.\-\_\+\$\:\[\]\\\~]
 				   yylval.integer = strtoul(yytext+1, 0, base);	
 				   return INT;
 				 }
-<DEFSYMEXP,MRI,BOTH,EXPRESSION>"$"?"0x"?([0-9A-Fa-f])+(M|K|m|k)? {
+<SCRIPT,DEFSYMEXP,MRI,BOTH,EXPRESSION>"$"?"0x"?([0-9A-Fa-f])+(M|K|m|k)? {
 				  yylval.integer = strtoul(yytext,0,hex_mode);
 				  if (yytext[yyleng-1]=='M'
 					|| yytext[yyleng-1] == 'm') {
@@ -305,6 +311,7 @@ NOCFILENAMECHAR	[_a-zA-Z0-9\/\.\-\_\+\$\:\[\]\\\~]
 <BOTH,SCRIPT>"l"			{ RTOKEN( LENGTH);}
 <BOTH,SCRIPT>"len"			{ RTOKEN( LENGTH);}
 <BOTH,SCRIPT>"INCLUDE"			{ RTOKEN(INCLUDE);}
+<EXPRESSION,BOTH,SCRIPT>"AT"			{ RTOKEN(AT);}
 <MRI>"\n"	                { ++ lineno;  RTOKEN(NEWLINE); }
 <MRI>"*".*			{ /* Mri comment line */ }
 <MRI>"END"                      { RTOKEN(ENDWORD); }
@@ -383,6 +390,7 @@ NOCFILENAMECHAR	[_a-zA-Z0-9\/\.\-\_\+\$\:\[\]\\\~]
   }
   else 
   {
+    BEGIN(SCRIPT);
     ldfile_input_filename = file_name_stack[include_stack_ptr-1];
   }