mirror of
https://git.code.sf.net/p/quake/quakeforge
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6d62e91ce7
pr_type_t now contains only the one "value" field, and all the access macros now use their PACKED variant for base access, making access to larger types more consistent with the smaller types.
301 lines
7 KiB
C
301 lines
7 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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#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 "QF/alloc.h"
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#include "tools/qfcc/include/codespace.h"
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#include "tools/qfcc/include/def.h"
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#include "tools/qfcc/include/defspace.h"
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#include "tools/qfcc/include/diagnostic.h"
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#include "tools/qfcc/include/emit.h"
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#include "tools/qfcc/include/expr.h"
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#include "tools/qfcc/include/function.h"
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#include "tools/qfcc/include/qfcc.h"
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#include "tools/qfcc/include/reloc.h"
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static reloc_t *refs_freelist;
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static const char *reloc_name[] = {
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"rel_none",
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"rel_op_a_def",
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"rel_op_b_def",
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"rel_op_c_def",
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"rel_op_a_op",
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"rel_op_b_op",
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"rel_op_c_op",
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"rel_def_op",
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"rel_def_def",
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"rel_def_func",
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"rel_def_string",
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"rel_def_field",
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"rel_op_a_def_ofs",
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"rel_op_b_def_ofs",
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"rel_op_c_def_ofs",
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"rel_def_def_ofs",
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"rel_def_field_ofs",
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};
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#define RELOC(r) (r)->space->data[(r)->offset].value
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void
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relocate_refs (reloc_t *reloc, int offset)
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{
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int o;
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while (reloc) {
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debug (0, "reloc %s:%x %s %x",
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reloc->space ? (reloc->space == pr.near_data ? "near" : "far")
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: "code",
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reloc->offset, reloc_name[reloc->type], offset);
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switch (reloc->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 (offset > 65535)
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error (0, "def offset too large");
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else
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pr.code->code[reloc->offset].a = offset;
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break;
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case rel_op_b_def:
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if (offset > 65535)
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error (0, "def offset too large");
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else
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pr.code->code[reloc->offset].b = offset;
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break;
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case rel_op_c_def:
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if (offset > 65535)
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error (0, "def offset too large");
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else
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pr.code->code[reloc->offset].c = offset;
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break;
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case rel_op_a_op:
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o = offset - reloc->offset;
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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[reloc->offset].a = o;
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break;
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case rel_op_b_op:
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o = offset - reloc->offset;
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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[reloc->offset].b = o;
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break;
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case rel_op_c_op:
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o = offset - reloc->offset;
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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[reloc->offset].c = o;
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break;
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case rel_def_op:
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if (offset > pr.code->size) {
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error (0, "invalid statement offset: %d >= %d, %d",
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offset, pr.code->size, reloc->offset);
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} else
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RELOC (reloc) = offset;
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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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RELOC (reloc) = offset;
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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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case rel_op_a_def_ofs:
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o = offset + pr.code->code[reloc->offset].a;
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if (o < 0 || o > 65535)
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error (0, "def offset out of range");
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else
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pr.code->code[reloc->offset].a = o;
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break;
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case rel_op_b_def_ofs:
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o = offset + pr.code->code[reloc->offset].b;
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if (o < 0 || o > 65535)
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error (0, "def offset out of range");
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else
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pr.code->code[reloc->offset].b = o;
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break;
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case rel_op_c_def_ofs:
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o = offset + pr.code->code[reloc->offset].c;
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if (o < 0 || o > 65535)
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error (0, "def offset out of range");
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else
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pr.code->code[reloc->offset].c = o;
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break;
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case rel_def_def_ofs:
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RELOC (reloc) += offset;
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break;
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case rel_def_field_ofs:
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//FIXME what is correct here?
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//RELOC (reloc) += pr.data->data[offset].int_var;
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RELOC (reloc) += PR_PTR (int, &pr.near_data->data[offset]);
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break;
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}
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reloc = reloc->next;
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}
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}
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reloc_t *
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new_reloc (defspace_t *space, int offset, 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->space = space;
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ref->offset = offset;
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ref->type = type;
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ref->line = pr.source_line;
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ref->file = pr.source_file;
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ref->return_address = __builtin_return_address (0);
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return ref;
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}
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void
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reloc_op_def (def_t *def, int offset, int field)
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{
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reloc_t *ref = new_reloc (0, offset, rel_op_a_def + field);
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ref->return_address = __builtin_return_address (0);
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ref->next = def->relocs;
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def->relocs = ref;
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}
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void
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reloc_op_def_ofs (def_t *def, int offset, int field)
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{
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reloc_t *ref = new_reloc (0, offset, rel_op_a_def_ofs + field);
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ref->return_address = __builtin_return_address (0);
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ref->next = def->relocs;
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def->relocs = ref;
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}
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void
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reloc_def_def (def_t *def, const def_t *location)
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{
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reloc_t *ref;
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ref = new_reloc (location->space, location->offset, rel_def_def);
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ref->return_address = __builtin_return_address (0);
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ref->next = def->relocs;
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def->relocs = ref;
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}
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void
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reloc_def_def_ofs (def_t *def, const def_t *location)
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{
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reloc_t *ref;
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ref = new_reloc (location->space, location->offset, rel_def_def_ofs);
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ref->return_address = __builtin_return_address (0);
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ref->next = def->relocs;
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def->relocs = ref;
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}
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void
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reloc_def_func (function_t *func, const def_t *location)
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{
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reloc_t *ref;
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ref = new_reloc (location->space, location->offset, rel_def_func);
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ref->return_address = __builtin_return_address (0);
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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 (const def_t *location)
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{
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reloc_t *ref;
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ref = new_reloc (location->space, location->offset, rel_def_string);
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ref->return_address = __builtin_return_address (0);
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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, const def_t *location)
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{
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reloc_t *ref;
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ref = new_reloc (location->space, location->offset, rel_def_field);
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ref->return_address = __builtin_return_address (0);
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ref->next = def->relocs;
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def->relocs = ref;
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}
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void
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reloc_def_field_ofs (def_t *def, const def_t *location)
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{
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reloc_t *ref;
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ref = new_reloc (location->space, location->offset, rel_def_field_ofs);
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ref->return_address = __builtin_return_address (0);
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ref->next = def->relocs;
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def->relocs = ref;
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}
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void
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reloc_def_op (const ex_label_t *label, const def_t *location)
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{
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reloc_t *ref;
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ref = new_reloc (location->space, location->offset, rel_def_op);
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ref->return_address = __builtin_return_address (0);
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ref->next = pr.relocs;
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ref->label = label;
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pr.relocs = ref;
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}
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void
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reloc_attach_relocs (reloc_t *relocs, reloc_t **location)
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{
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reloc_t *r;
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if (!relocs)
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return;
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for (r = relocs; r->next; r = r->next)
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;
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r->next = *location;
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*location = relocs;
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}
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