386BSD 0.0 development

Work on file usr/src/usr.bin/gas/write.h

Co-Authored-By: Lynne Greer Jolitz <ljolitz@cardio.ucsf.edu>
Synthesized-from: 386BSD-0.0/src

diff --git a/usr/src/usr.bin/gas/write.h b/usr/src/usr.bin/gas/write.h
new file mode 100644 (file)
index 0000000..7327690
--- /dev/null
+++ b/usr/src/usr.bin/gas/write.h
@@ -0,0 +1,77 @@
+/* write.h -> write.c
+   Copyright (C) 1987 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 1, 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.  */
+
+/* The bit_fix was implemented to support machines that need variables
+   to be inserted in bitfields other than 1, 2 and 4 bytes. 
+   Furthermore it gives us a possibillity to mask in bits in the symbol
+   when it's fixed in the objectcode and check the symbols limits.
+
+   The or-mask is used to set the huffman bits in displacements for the
+   ns32k port.
+   The acbi, addqi, movqi, cmpqi instruction requires an assembler that
+   can handle bitfields. Ie handle an expression, evaluate it and insert
+   the result in an some bitfield. ( ex: 5 bits in a short field of a opcode) 
+ */
+
+
+struct bit_fix {
+  int                  fx_bit_size;    /* Length of bitfield           */
+  int                  fx_bit_offset;  /* Bit offset to bitfield       */
+  long                 fx_bit_base;    /* Where do we apply the bitfix.
+                                       If this is zero, default is assumed. */
+  long                  fx_bit_base_adj;/* Adjustment of base */
+  long                 fx_bit_max;     /* Signextended max for bitfield */
+  long                 fx_bit_min;     /* Signextended min for bitfield */
+  long                 fx_bit_add;     /* Or mask, used for huffman prefix */
+};
+typedef struct bit_fix bit_fixS;
+/*
+ * FixSs may be built up in any order.
+ */
+
+struct fix
+{
+  fragS *              fx_frag;        /* Which frag? */
+  long int             fx_where;       /* Where is the 1st byte to fix up? */
+  symbolS *            fx_addsy; /* NULL or Symbol whose value we add in. */
+  symbolS *            fx_subsy; /* NULL or Symbol whose value we subtract. */
+  long int             fx_offset;      /* Absolute number we add in. */
+  struct fix *         fx_next;        /* NULL or -> next fixS. */
+  short int            fx_size;        /* How many bytes are involved? */
+  char                 fx_pcrel;       /* TRUE: pc-relative. */
+  char                 fx_pcrel_adjust;/* pc-relative offset adjust */
+  char                 fx_im_disp;     /* TRUE: value is a displacement */
+  bit_fixS *           fx_bit_fixP;    /* IF NULL no bitfix's to do */  
+  char                 fx_bsr;         /* sequent-hack */
+#if defined(SPARC) || defined(I860)
+  char                 fx_r_type;      /* Sparc hacks */
+  long                 fx_addnumber;
+#endif
+};
+
+typedef struct fix     fixS;
+
+
+COMMON fixS *  text_fix_root;  /* Chains fixSs. */
+COMMON fixS *  data_fix_root;  /* Chains fixSs. */
+COMMON fixS ** seg_fix_rootP;  /* -> one of above. */
+
+bit_fixS *bit_fix_new();
+/* end: write.h */
+