mirror of
https://git.code.sf.net/p/quake/quakeforge
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162 lines
3.3 KiB
C
162 lines
3.3 KiB
C
/*
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reloc.c
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relocation support
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Copyright (C) 2002 Bill Currie <bill@taniwha.org>
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Author: Bill Currie <bill@taniwha.org>
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Date: 2002/06/07
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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static __attribute__ ((unused)) const char rcsid[] =
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"$Id$";
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include <stdlib.h>
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#include "def.h"
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#include "emit.h"
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#include "expr.h"
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#include "function.h"
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#include "qfcc.h"
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#include "reloc.h"
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static reloc_t *free_refs;
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void
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relocate_refs (reloc_t *refs, int ofs)
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{
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int o;
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while (refs) {
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switch (refs->type) {
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case rel_none:
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break;
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case rel_op_a_def:
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if (ofs > 65535)
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error (0, "def offset too large");
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else
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pr.code->code[refs->ofs].a = ofs;
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break;
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case rel_op_b_def:
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if (ofs > 65535)
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error (0, "def offset too large");
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else
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pr.code->code[refs->ofs].b = ofs;
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break;
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case rel_op_c_def:
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if (ofs > 65535)
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error (0, "def offset too large");
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else
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pr.code->code[refs->ofs].c = ofs;
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break;
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case rel_op_a_op:
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o = ofs - refs->ofs;
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if (o < -32768 || o > 32767)
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error (0, "relative offset too large");
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else
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pr.code->code[refs->ofs].a = o;
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break;
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case rel_op_b_op:
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o = ofs - refs->ofs;
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if (o < -32768 || o > 32767)
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error (0, "relative offset too large");
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else
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pr.code->code[refs->ofs].b = o;
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break;
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case rel_op_c_op:
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o = ofs - refs->ofs;
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if (o < -32768 || o > 32767)
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error (0, "relative offset too large");
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else
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pr.code->code[refs->ofs].c = o;
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break;
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case rel_def_op:
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if (ofs >= pr.code->size)
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error (0, "invalid statement offset");
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else
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G_INT (refs->ofs) = ofs;
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break;
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case rel_def_def:
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case rel_def_func:
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G_INT (refs->ofs) = ofs;
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break;
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case rel_def_string:
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break;
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case rel_def_field:
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break;
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}
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refs = refs->next;
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}
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}
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reloc_t *
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new_reloc (int ofs, reloc_type type)
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{
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reloc_t *ref;
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ALLOC (16384, reloc_t, refs, ref);
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ref->ofs = ofs;
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ref->type = type;
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return ref;
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}
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void
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reloc_def_def (def_t *def, int ofs)
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{
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reloc_t *ref = new_reloc (ofs, rel_def_def);
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ref->next = def->refs;
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def->refs = ref;
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}
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void
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reloc_def_func (function_t *func, int ofs)
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{
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reloc_t *ref = new_reloc (ofs, rel_def_func);
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ref->next = func->refs;
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func->refs = ref;
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}
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void
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reloc_def_string (int ofs)
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{
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reloc_t *ref = new_reloc (ofs, rel_def_string);
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ref->next = pr.relocs;
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pr.relocs = ref;
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}
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void
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reloc_def_field (def_t *def, int ofs)
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{
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reloc_t *ref = new_reloc (ofs, rel_def_field);
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ref->next = def->refs;
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def->refs = ref;
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}
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