mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-14 17:01:22 +00:00
2df64384c1
They are both gone, and pr_pointer_t is now pr_ptr_t (pointer may be a little clearer than ptr, but ptr is consistent with things like intptr, and keeps the type name short).
247 lines
8.7 KiB
C
247 lines
8.7 KiB
C
/*
|
|
reloc.h
|
|
|
|
relocation support
|
|
|
|
Copyright (C) 2002 Bill Currie <bill@taniwha.org>
|
|
|
|
Author: Bill Currie <bill@taniwha.org>
|
|
Date: 2002/06/07
|
|
|
|
This program 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 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program 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 this program; if not, write to:
|
|
|
|
Free Software Foundation, Inc.
|
|
59 Temple Place - Suite 330
|
|
Boston, MA 02111-1307, USA
|
|
|
|
*/
|
|
|
|
#ifndef __reloc_h
|
|
#define __reloc_h
|
|
|
|
/** \defgroup qfcc_reloc Relocation handling
|
|
\ingroup qfcc
|
|
*/
|
|
///@{
|
|
|
|
/** Relocation record types.
|
|
Types marked with * are relative and fixed up before the qfo is written.
|
|
Types marked with ! are handled by only the linker.
|
|
Types marked with + use pr.relocs
|
|
*/
|
|
typedef enum {
|
|
rel_none, ///< no relocation
|
|
rel_op_a_def, ///< code[ref.offset].a = def offset
|
|
rel_op_b_def, ///< code[ref.offset].b = def offset
|
|
rel_op_c_def, ///< code[ref.offset].c = def offset
|
|
rel_op_a_op, ///< * code[ref.offset].a = code offset - ref.offset
|
|
rel_op_b_op, ///< * code[ref.offset].b = code offset - ref.offset
|
|
rel_op_c_op, ///< * code[ref.offset].c = code offset - ref.offset
|
|
rel_def_op, ///< + data[ref.offset] = code offset
|
|
rel_def_def, ///< data[ref.offset] = def offset
|
|
rel_def_func, ///< +(sometimes) data[ref.offset] = offset
|
|
rel_def_string, ///< + ! data[ref.offset] = string index
|
|
rel_def_field, ///< ! data[ref.offset] = field def offset
|
|
rel_op_a_def_ofs, ///< code[ref.offset].a += def offset
|
|
rel_op_b_def_ofs, ///< code[ref.offset].b += def offset
|
|
rel_op_c_def_ofs, ///< code[ref.offset].c += def offset
|
|
rel_def_def_ofs, ///< data[ref.offset] += def offset
|
|
rel_def_field_ofs, ///< data[ref.offset] += field def offset
|
|
} reloc_type;
|
|
|
|
/** Relocation record.
|
|
|
|
One relocation record is created for each reference that needs to be
|
|
updated.
|
|
*/
|
|
typedef struct reloc_s {
|
|
struct reloc_s *next; ///< next reloc in reloc chain
|
|
const struct ex_label_s *label; ///< instruction label for *_op relocs
|
|
struct defspace_s *space; ///< the space containing the location in
|
|
///< need of adjustment for def_* relocations
|
|
///< (op_* relocations always use the code
|
|
///< space)
|
|
int offset; ///< the address of the location in need of
|
|
///< adjustment
|
|
reloc_type type; ///< type type of relocation to perform
|
|
int line; ///< current source line when creating reloc
|
|
pr_string_t file; ///< current source file when creating reloc
|
|
const void *return_address; ///< for debugging
|
|
} reloc_t;
|
|
|
|
struct statement_s;
|
|
struct def_s;
|
|
struct function_s;
|
|
|
|
/** Perform all relocations in a relocation chain.
|
|
|
|
\param refs The head of the relocation chain.
|
|
\param offset The value to be used in the relocations. This will either
|
|
replace or be added to the value in the relocation target.
|
|
*/
|
|
void relocate_refs (reloc_t *refs, int offset);
|
|
|
|
/** Create a relocation record of the specified type.
|
|
|
|
The current source file and line will be preserved in the relocation
|
|
record.
|
|
|
|
\param space The defspace containting the location to be adjusted.
|
|
\param offset The address of the location to be adjusted.
|
|
\param type The type of relocation to be performed.
|
|
*/
|
|
reloc_t *new_reloc (struct defspace_s *space, int offset, reloc_type type);
|
|
|
|
/** Create a relocation record for an instruction referencing a def.
|
|
|
|
The relocation record will be linked into the def's chain of relocation
|
|
records.
|
|
|
|
When the relocation is performed, the target address will replace the
|
|
value stored in the instruction's operand field.
|
|
|
|
\param def The def being referenced.
|
|
\param offset The address of the instruction that will be adjusted.
|
|
\param field The instruction field to be adjusted: 0 = opa, 1 = opb,
|
|
2 = opc.
|
|
*/
|
|
void reloc_op_def (struct def_s *def, int offset, int field);
|
|
|
|
/** Create a relative relocation record for an instruction referencing a def.
|
|
|
|
The relocation record will be linked into the def's chain of relocation
|
|
records.
|
|
|
|
When the relocation is performed, the target address will be added to
|
|
the value stored in the instruction's operand field.
|
|
|
|
\param def The def being referenced.
|
|
\param offset The address of the instruction that will be adjusted.
|
|
\param field The instruction field to be adjusted: 0 = opa, 1 = opb,
|
|
2 = opc.
|
|
*/
|
|
void reloc_op_def_ofs (struct def_s *def, int offset, int field);
|
|
|
|
/** Create a relocation record for a data location referencing a def.
|
|
|
|
The relocation record will be linked into the def's chain of relocation
|
|
records.
|
|
|
|
When the relocation is performed, the target address will replace the
|
|
value stored in the data location.
|
|
|
|
\param def The def being referenced.
|
|
\param location Def describing the location of the reference to be
|
|
adjusted. As the def's space and offset will be copied
|
|
into the relocation record, a dummy def may be used.
|
|
*/
|
|
void reloc_def_def (struct def_s *def, const struct def_s *location);
|
|
|
|
/** Create a relocation record for a data location referencing a def.
|
|
|
|
The relocation record will be linked into the def's chain of relocation
|
|
records.
|
|
|
|
When the relocation is performed, the target address will be added to
|
|
the value stored in the data location.
|
|
|
|
\param def The def being referenced.
|
|
\param location Def describing the location of the reference to be
|
|
adjusted. As the def's space and offset will be copied
|
|
into the relocation record, a dummy def may be used.
|
|
*/
|
|
void reloc_def_def_ofs (struct def_s *def, const struct def_s *location);
|
|
|
|
/** Create a relocation record for a data location referencing a function.
|
|
|
|
The relocation record will be linked into the function's chain of
|
|
relocation records.
|
|
|
|
When the relocation is performed, the function number will replace the
|
|
value stored in the data location.
|
|
|
|
\param func The function being referenced.
|
|
\param location Def describing the location of the reference to be
|
|
adjusted. As the def's space and offset will be copied
|
|
into the relocation record, a dummy def may be used.
|
|
*/
|
|
void reloc_def_func (struct function_s *func, const struct def_s *location);
|
|
|
|
/** Create a relocation record for a data location referencing a string.
|
|
|
|
The relocation record will be linked into the global chain of
|
|
relocation records.
|
|
|
|
When the relocation is performed, the string index will replace the
|
|
value stored in the data location.
|
|
|
|
\param location Def describing the location of the reference to be
|
|
adjusted. As the def's space and offset will be copied
|
|
into the relocation record, a dummy def may be used.
|
|
*/
|
|
void reloc_def_string (const struct def_s *location);
|
|
|
|
/** Create a relocation record for a data location referencing a field.
|
|
|
|
The relocation record will be linked into the def's chain of relocation
|
|
records.
|
|
|
|
When the relocation is performed, the target address will replace the
|
|
value stored in the data location.
|
|
|
|
\param def The def representing the field being referenced.
|
|
\param location Def describing the location of the reference to be
|
|
adjusted. As the def's space and offset will be copied
|
|
into the relocation record, a dummy def may be used.
|
|
*/
|
|
void reloc_def_field (struct def_s *def, const struct def_s *location);
|
|
|
|
/** Create a relocation record for a data location referencing a field.
|
|
|
|
The relocation record will be linked into the def's chain of relocation
|
|
records.
|
|
|
|
When the relocation is performed, the target address will be added to
|
|
the value stored in the data location.
|
|
|
|
\param def The def representing the field being referenced.
|
|
\param location Def describing the location of the reference to be
|
|
adjusted. As the def's space and offset will be copied
|
|
into the relocation record, a dummy def may be used.
|
|
*/
|
|
void reloc_def_field_ofs (struct def_s *def, const struct def_s *location);
|
|
|
|
/** Create a relocation record for a data location referencing an
|
|
instruction.
|
|
|
|
The relocation record will be linked into the global chain of
|
|
relocation records.
|
|
|
|
When the relocation is performed, the string index will replace the
|
|
value stored in the data location.
|
|
|
|
\param label The label representing the instruction being referenced.
|
|
\param location Def describing the location of the reference to be
|
|
adjusted. As the def's space and offset will be copied
|
|
into the relocation record, a dummy def may be used.
|
|
*/
|
|
void reloc_def_op (const struct ex_label_s *label,
|
|
const struct def_s *location);
|
|
|
|
void reloc_attach_relocs (reloc_t *relocs, reloc_t **location);
|
|
|
|
///@}
|
|
|
|
#endif//__reloc_h
|