* read.c (do_align): Add max parameter. Change all callers.

Remove useless static variables. (s_align): New static function. Do common portion of s_align_bytes and s_align_ptwo. (s_align_bytes, s_align_ptwo): Just call s_align. * frags.c (frag_align): Add max parameter. Change all callers. (frag_align_pattern): Likewise. * frags.h (frag_align, frag_align_pattern): Update declarations. * write.c (relax_segment): Limit alignment change to fr_subtype. Fix some types to be addressT. * config/obj-coff.c (size_section): Likewise. * config/obj-ieee.c (size_section): Likewise. * config/tc-d10v.h (md_do_align): Add max parameter. * config/tc-i386.h (md_do_align): Likewise. * config/tc-m88k.h (md_do_align): Likewise. * config/tc-m88k.c (m88k_do_align): Likewise. * config/tc-sh.h (md_do_align): Likewise. * config/tc-sh.c (sh_do_align): Likewise. * as.h: Improve comments on rs_align and rs_align_code. * doc/as.texinfo: Document new alignment arguments. * doc/internals.texi (Frags): Document use of fr_subtype field for rs_align and rs_align_code.
2024-11-25 21:19:54 +00:00 · 1997-02-14 22:49:25 +00:00 · 1997-02-14 22:49:25 +00:00 · d7bf6158eb
commit d7bf6158eb
parent d7e89eaff8
8 changed files with 178 additions and 31 deletions
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@ -1,3 +1,32 @@
+Fri Feb 14 17:24:48 1997  Ian Lance Taylor  <ian@cygnus.com>
+
+	* read.c (do_align): Add max parameter.  Change all callers.
+	Remove useless static variables.
+	(s_align): New static function.  Do common portion of
+	s_align_bytes and s_align_ptwo.
+	(s_align_bytes, s_align_ptwo): Just call s_align.
+	* frags.c (frag_align): Add max parameter.  Change all callers.
+	(frag_align_pattern): Likewise.
+	* frags.h (frag_align, frag_align_pattern): Update declarations.
+	* write.c (relax_segment): Limit alignment change to fr_subtype.
+	Fix some types to be addressT.
+	* config/obj-coff.c (size_section): Likewise.
+	* config/obj-ieee.c (size_section): Likewise.
+	* config/tc-d10v.h (md_do_align): Add max parameter.
+	* config/tc-i386.h (md_do_align): Likewise.
+	* config/tc-m88k.h (md_do_align): Likewise.
+	* config/tc-m88k.c (m88k_do_align): Likewise.
+	* config/tc-sh.h (md_do_align): Likewise.
+	* config/tc-sh.c (sh_do_align): Likewise.
+	* as.h: Improve comments on rs_align and rs_align_code.
+	* doc/as.texinfo: Document new alignment arguments.
+	* doc/internals.texi (Frags): Document use of fr_subtype field for
+	rs_align and rs_align_code.
+
+Fri Feb 14 15:56:06 1997  Gavin Koch  <gavin@cygnus.com>
+
+	* config/tc-mips.c: Changed opcode parsing.
+
 Thu Feb 13 20:02:16 1997  Fred Fish  <fnf@cygnus.com>

 	* config/{tc-alpha.h, tc-arc.h, tc-d10v.h, tc-generic.h, tc-i960.h,
--- a/gas/config/obj-coff.c
+++ b/gas/config/obj-coff.c
@ -1524,8 +1524,15 @@ size_section (abfd, idx)
 	  break;
 	case rs_align:
 	case rs_align_code:
-	  size += frag->fr_fix;
-	  size += relax_align (size, frag->fr_offset);
+	  {
+	    addressT off;
+
+	    size += frag->fr_fix;
+	    off = relax_align (size, frag->fr_offset);
+	    if (frag->fr_subtype != 0 && off > frag->fr_subtype)
+	      off = 0;
+	    size += off;
+	  }
 	  break;
 	default:
 	  BAD_CASE (frag->fr_type);
@ -1648,7 +1655,16 @@ do_relocs_for (abfd, h, file_cursor)
 		      while (symbol_ptr->sy_value.X_op == O_symbol
 			     && (! S_IS_DEFINED (symbol_ptr)
 				 || S_IS_COMMON (symbol_ptr)))
-			symbol_ptr = symbol_ptr->sy_value.X_add_symbol;
+			{
+			  symbolS *n;
+
+			  /* We must avoid looping, as that can occur
+                             with a badly written program.  */
+			  n = symbol_ptr->sy_value.X_add_symbol;
+			  if (n == symbol_ptr)
+			    break;
+			  symbol_ptr = n;
+			}

 		      /* Turn the segment of the symbol into an offset.  */
 		      if (symbol_ptr)
@ -3106,10 +3122,10 @@ write_object_file ()
 #ifdef md_do_align
      {
 	static char nop = NOP_OPCODE;
-	md_do_align (SUB_SEGMENT_ALIGN (now_seg), &nop, 1, alignment_done);
+	md_do_align (SUB_SEGMENT_ALIGN (now_seg), &nop, 1, 0, alignment_done);
      }
 #endif
-      frag_align (SUB_SEGMENT_ALIGN (now_seg), NOP_OPCODE);
+      frag_align (SUB_SEGMENT_ALIGN (now_seg), NOP_OPCODE, 0);
 #ifdef md_do_align
    alignment_done:
 #endif
@ -3848,6 +3864,34 @@ fixup_segment (segP, this_segment_type)
         happened if these are expression symbols.  */
      if (add_symbolP != NULL && ! add_symbolP->sy_resolved)
 	resolve_symbol_value (add_symbolP);
+
+      if (add_symbolP != NULL)
+	{
+	  /* If this fixup is against a symbol which has been equated
+	     to another symbol, convert it to the other symbol.  */
+	  if (add_symbolP->sy_value.X_op == O_symbol
+	      && (! S_IS_DEFINED (add_symbolP)
+		  || S_IS_COMMON (add_symbolP)))
+	    {
+	      while (add_symbolP->sy_value.X_op == O_symbol
+		     && (! S_IS_DEFINED (add_symbolP)
+			 || S_IS_COMMON (add_symbolP)))
+		{
+		  symbolS *n;
+
+		  /* We must avoid looping, as that can occur with a
+		     badly written program.  */
+		  n = add_symbolP->sy_value.X_add_symbol;
+		  if (n == add_symbolP)
+		    break;
+		  add_number += add_symbolP->sy_value.X_add_number;
+		  add_symbolP = n;
+		}
+	      fixP->fx_addsy = add_symbolP;
+	      fixP->fx_offset = add_number;
+	    }
+	}
+
      if (sub_symbolP != NULL && ! sub_symbolP->sy_resolved)
 	resolve_symbol_value (sub_symbolP);

@ -4096,12 +4140,12 @@ fixup_segment (segP, this_segment_type)
 	       && ((add_number & ~0xFF)
 		   || (fixP->fx_signed && (add_number & 0x80)))
 	       && ((add_number & ~0xFF) != (-1 & ~0xFF)
-		   || (fixP->fx_signed && (add_number & 0x80) == 0)))
+		   || (add_number & 0x80) == 0))
 	      || (size == 2
 		  && ((add_number & ~0xFFFF)
 		      || (fixP->fx_signed && (add_number & 0x8000)))
 		  && ((add_number & ~0xFFFF) != (-1 & ~0xFFFF)
-		      || (fixP->fx_signed && (add_number & 0x8000) == 0))))
+		      || (add_number & 0x8000) == 0)))
 	    {
 	      as_bad_where (fixP->fx_file, fixP->fx_line,
 			    "Value of %ld too large for field of %d bytes at 0x%lx",
--- a/gas/config/obj-ieee.c
+++ b/gas/config/obj-ieee.c
@ -1,5 +1,5 @@
 /* obj-format for ieee-695 records.
-   Copyright (C) 1991, 1992 Free Software Foundation, Inc.
+   Copyright (C) 1991, 92, 93, 94, 95, 1997 Free Software Foundation, Inc.

   This file is part of GAS, the GNU Assembler.

@ -14,8 +14,9 @@
   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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+   along with GAS; see the file COPYING.  If not, write to the Free
+   Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, USA. */


 /*
@ -76,7 +77,15 @@ DEFUN (size_section, (abfd, idx),
 	  size += frag->fr_offset * frag->fr_var;
 	  break;
 	case rs_align:
-	  size += relax_align (size, frag->fr_offset);
+	case rs_align_code:
+	  {
+	    addressT off;
+
+	    off = relax_align (size, frag->fr_offset);
+	    if (frag->fr_subtype != 0 && off > frag->fr_subtype)
+	      off = 0;
+	    size += off;
+	  }
 	}
      frag = frag->fr_next;
    }
@ -529,7 +538,7 @@ DEFUN_VOID (write_object_file)
 #ifndef SUB_SEGMENT_ALIGN
 #define SUB_SEGMENT_ALIGN(SEG) 2
 #endif
-      frag_align (SUB_SEGMENT_ALIGN (now_seg), 0);
+      frag_align (SUB_SEGMENT_ALIGN (now_seg), 0, 0);
      frag_wane (frag_now);
      frag_now->fr_fix = 0;
      know (frag_now->fr_next == NULL);
--- a/gas/config/tc-d10v.h
+++ b/gas/config/tc-d10v.h
@ -1,5 +1,5 @@
 /* tc-d10v.h -- Header file for tc-d10v.c.
-   Copyright (C) 1996 Free Software Foundation, Inc.
+   Copyright (C) 1996, 1997 Free Software Foundation, Inc.
   Written by Martin Hunt, Cygnus Support.

   This file is part of GAS, the GNU Assembler.
@ -20,6 +20,8 @@

 #define TC_D10V

+#define TARGET_BYTES_BIG_ENDIAN 0
+
 #ifndef BFD_ASSEMBLER
 #error D10V support requires BFD_ASSEMBLER
 #endif
@ -50,7 +52,7 @@
 int d10v_cleanup PARAMS ((void));
 #define md_after_pass_hook()	     d10v_cleanup()
 #define md_cleanup()		     d10v_cleanup()
-#define md_do_align(a,b,c,d)	     d10v_cleanup()
+#define md_do_align(a,b,c,d,e)	     d10v_cleanup()
 #define TC_START_LABEL(ch, ptr)  (ch == ':' && d10v_cleanup())


--- a/gas/config/tc-i386.h
+++ b/gas/config/tc-i386.h
@ -1,5 +1,5 @@
 /* tc-i386.h -- Header file for tc-i386.c
-   Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation.
+   Copyright (C) 1989, 92, 93, 94, 95, 96, 1997 Free Software Foundation.

   This file is part of GAS, the GNU Assembler.

@ -20,6 +20,8 @@
 #ifndef TC_I386
 #define TC_I386 1

+#define TARGET_BYTES_BIG_ENDIAN	0
+
 #ifdef TE_LYNX
 #define TARGET_FORMAT		"coff-i386-lynx"
 #endif
@ -59,7 +61,6 @@
   && (FIX)->fx_r_type != BFD_RELOC_386_GOTPC)

 #define TARGET_ARCH		bfd_arch_i386
-#define TARGET_BYTES_BIG_ENDIAN	0

 #ifdef OBJ_AOUT
 #ifdef TE_NetBSD
@ -90,17 +91,26 @@
 #define COFF_MAGIC I386MAGIC
 #define BFD_ARCH bfd_arch_i386
 #define COFF_FLAGS F_AR32WR
-#define TC_COUNT_RELOC(x) ((x)->fx_addsy /* ||(x)->fx_subsy||(x)->fx_offset */)
+#define TC_COUNT_RELOC(x) ((x)->fx_addsy || (x)->fx_r_type==7)
+#define TC_FORCE_RELOCATION(x) ((x)->fx_r_type==7)
 #define TC_COFF_FIX2RTYPE(fixP) tc_coff_fix2rtype(fixP)
 extern short tc_coff_fix2rtype ();
 #define TC_COFF_SIZEMACHDEP(frag) tc_coff_sizemachdep(frag)
 extern int tc_coff_sizemachdep PARAMS ((fragS *frag));
 #define SUB_SEGMENT_ALIGN(SEG) 2
-
+#define TC_RVA_RELOC 7
 /* Need this for PIC relocations */
 #define NEED_FX_R_TYPE

+
+#ifdef TE_386BSD
+/* The BSDI linker apparently rejects objects with a machine type of
+   M_386 (100).  */
+#define AOUT_MACHTYPE 0
+#else
 #define AOUT_MACHTYPE 100
+#endif
+
 #undef REVERSE_SORT_RELOCS

 #endif /* ! BFD_ASSEMBLER */
@ -113,11 +123,13 @@ extern int tc_coff_sizemachdep PARAMS ((fragS *frag));
 #define tc_coff_symbol_emit_hook(a)	;	/* not used */

 #ifndef OBJ_AOUT
+#ifndef TE_PE
 /* Local labels starts with .L */
 #define LOCAL_LABEL(name) (name[0] == '.' \
 		 && (name[1] == 'L' || name[1] == 'X' || name[1] == '.'))
 #define FAKE_LABEL_NAME ".L0\001"
 #endif
+#endif
 #define LOCAL_LABELS_FB 1

 #define tc_aout_pre_write_hook(x)	{;}	/* not used */
@ -363,4 +375,40 @@ void i386_validate_fix ();
 extern const struct relax_type md_relax_table[];
 #define TC_GENERIC_RELAX_TABLE md_relax_table

+
+extern int flag_16bit_code;
+
+#define md_do_align(n, fill, len, max, around)				\
+if ((n) && !need_pass_2							\
+    && (!(fill) || ((char)*(fill) == (char)0x90 && (len) == 1))		\
+    && now_seg != data_section && now_seg != bss_section)		\
+  {									\
+    char *p;								\
+    p = frag_var (rs_align_code, 15, 1, (relax_substateT) max,		\
+		  (symbolS *) 0, (long) (n), (char *) 0);		\
+    *p = 0x90;								\
+    goto around;							\
+  }
+
+extern void i386_align_code PARAMS ((fragS *, int));
+
+#define HANDLE_ALIGN(fragP)						\
+if (fragP->fr_type == rs_align_code) 					\
+  i386_align_code (fragP, (fragP->fr_next->fr_address			\
+			   - fragP->fr_address				\
+			   - fragP->fr_fix));
+
+/* call md_apply_fix3 with segment instead of md_apply_fix */
+#define MD_APPLY_FIX3
+
+void i386_print_statistics PARAMS ((FILE *));
+#define tc_print_statistics i386_print_statistics
+
+#define md_number_to_chars number_to_chars_littleendian
+
+#ifdef SCO_ELF
+#define tc_init_after_args() sco_id ()
+extern void sco_id PARAMS ((void));
+#endif
+
 /* end of tc-i386.h */
--- a/gas/config/tc-m88k.c
+++ b/gas/config/tc-m88k.c
@ -1,7 +1,7 @@
 /* m88k.c -- Assembler for the Motorola 88000
   Contributed by Devon Bowen of Buffalo University
   and Torbjorn Granlund of the Swedish Institute of Computer Science.
-   Copyright (C) 1989, 90, 91, 92, 93, 94, 95, 1996
+   Copyright (C) 1989, 90, 91, 92, 93, 94, 95, 96, 1997
   Free Software Foundation, Inc.

 This file is part of GAS, the GNU Assembler.
@ -17,8 +17,9 @@ 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+along with GAS; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.  */

 #include <ctype.h>
 #include "as.h"
@ -1291,7 +1292,7 @@ s_bss ()
 	  subseg_set (SEG_BSS, 1); /* switch to bss	*/

 	  if (bss_align)
-	    frag_align (bss_align, 0);
+	    frag_align (bss_align, 0, 0);

 	  /* detach from old frag */
 	  if (symbolP->sy_type == N_BSS && symbolP->sy_frag != NULL)
@ -1433,16 +1434,17 @@ md_pcrel_from (fixp)
 /* When we align the .init section, insert the correct NOP pattern.  */

 int
-m88k_do_align (n, fill, len)
+m88k_do_align (n, fill, max, len)
     int n;
     const char *fill;
     int len;
+     int max;
 {
  if ((fill == NULL || (*fill == 0 && len == 1))
      && strcmp (obj_segment_name (now_seg), ".init") == 0)
    {
      static const unsigned char nop_pattern[] = { 0xf4, 0x00, 0x58, 0x00 };
-      frag_align_pattern (n, nop_pattern, sizeof (nop_pattern));
+      frag_align_pattern (n, nop_pattern, sizeof (nop_pattern), max);
      return 1;
    }
  return 0;
--- a/gas/config/tc-m88k.h
+++ b/gas/config/tc-m88k.h
@ -1,7 +1,7 @@
 /* m88k.h -- Assembler for the Motorola 88000
   Contributed by Devon Bowen of Buffalo University
   and Torbjorn Granlund of the Swedish Institute of Computer Science.
-   Copyright (C) 1989, 90, 91, 92, 93, 94, 95, 1996
+   Copyright (C) 1989, 90, 91, 92, 93, 94, 95, 96, 1997
   Free Software Foundation, Inc.

 This file is part of GAS, the GNU Assembler.
@ -17,8 +17,9 @@ 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+along with GAS; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.  */

 #define TC_M88K

@ -98,7 +99,7 @@ struct reloc_info_m88k

 /* We use a special alignment function to insert the correct nop
   pattern in .init.  */
-extern int m88k_do_align PARAMS ((int, const char *, int));
-#define md_do_align(n,fill,len,l) if (m88k_do_align(n,fill,len)) goto l
+extern int m88k_do_align PARAMS ((int, const char *, int, int));
+#define md_do_align(n,fill,len,max,l) if (m88k_do_align(n,fill,max,len)) goto l

 #endif /* M88KCOFF */
--- a/gas/doc/internals.texi
+++ b/gas/doc/internals.texi
@ -495,8 +495,11 @@ The start of the following frag should be aligned on some boundary.  In this
 frag, @code{fr_offset} is the logarithm (base 2) of the alignment in bytes.
 (For example, if alignment on an 8-byte boundary were desired, @code{fr_offset}
 would have a value of 3.)  The variable characters indicate the fill pattern to
-be used.  Target backends can use @code{rs_align_code} to handle certain types
-of alignment differently.
+be used.  The @code{fr_subtype} field holds the maximum number of bytes to skip
+when doing this alignment.  If more bytes are needed, the alignment is not
+done.  An @code{fr_subtype} value of 0 means no maximum, which is the normal
+case.  Target backends can use @code{rs_align_code} to handle certain types of
+alignment differently.

@item rs_broken_word
 This indicates that ``broken word'' processing should be done (@pxref{Broken
@ -858,6 +861,15 @@ expression.  You can define this to handle special symbols in a special way.
 If a symbol always has a certain value, you should normally enter it in the
 symbol table, perhaps using @code{reg_section}.

+@item md_undefined_symbol
+@cindex md_undefined_symbol
+GAS will call this function when a symbol table lookup fails, before it
+creates a new symbol.  Typically this would be used to supply symbols whose
+name or value changes dynamically, possibly in a context sensitive way.
+Predefined symbols with fixed values, such as register names or condition
+codes, are typically entered directly into the symbol table when @code{md_begin}
+is called.
+
@item md_operand
@cindex md_operand
 GAS will call this function for any expression that can not be recognized.