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/* ----------------------------------------------------------------------- *
*
* Copyright 1996-2017 The NASM Authors - All Rights Reserved
* See the file AUTHORS included with the NASM distribution for
* the specific copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ----------------------------------------------------------------------- */
/*
* rdoff.h RDOFF Object File manipulation routines header file
*/
#ifndef RDOFF_H
#define RDOFF_H 1
/*
* RDOFF definitions. They are used by RDOFF utilities and by NASM's
* 'outrdf2.c' output module.
*/
/* RDOFF format revision (currently used only when printing the version) */
#define RDOFF2_REVISION "0.6.1"
/* RDOFF2 file signature */
#define RDOFF2_SIGNATURE "RDOFF2"
/* Maximum size of an import/export label (including trailing zero) */
#define EXIM_LABEL_MAX 256
/* Maximum size of library or module name (including trailing zero) */
#define MODLIB_NAME_MAX 128
/* Maximum number of segments that we can handle in one file */
#define RDF_MAXSEGS 64
/* Record types that may present the RDOFF header */
#define RDFREC_GENERIC 0
#define RDFREC_RELOC 1
#define RDFREC_IMPORT 2
#define RDFREC_GLOBAL 3
#define RDFREC_DLL 4
#define RDFREC_BSS 5
#define RDFREC_SEGRELOC 6
#define RDFREC_FARIMPORT 7
#define RDFREC_MODNAME 8
#define RDFREC_COMMON 10
/*
* Generic record - contains the type and length field, plus a 128 byte
* array 'data'
*/
struct GenericRec {
uint8_t type;
uint8_t reclen;
char data[128];
};
/*
* Relocation record
*/
struct RelocRec {
uint8_t type; /* must be 1 */
uint8_t reclen; /* content length */
uint8_t segment; /* only 0 for code, or 1 for data supported,
but add 64 for relative refs (ie do not require
reloc @ loadtime, only linkage) */
int32_t offset; /* from start of segment in which reference is loc'd */
uint8_t length; /* 1 2 or 4 bytes */
uint16_t refseg; /* segment to which reference refers to */
};
/*
* Extern/import record
*/
struct ImportRec {
uint8_t type; /* must be 2 */
uint8_t reclen; /* content length */
uint8_t flags; /* SYM_* flags (see below) */
uint16_t segment; /* segment number allocated to the label for reloc
records - label is assumed to be at offset zero
in this segment, so linker must fix up with offset
of segment and of offset within segment */
char label[EXIM_LABEL_MAX]; /* zero terminated, should be written to file
until the zero, but not after it */
};
/*
* Public/export record
*/
struct ExportRec {
uint8_t type; /* must be 3 */
uint8_t reclen; /* content length */
uint8_t flags; /* SYM_* flags (see below) */
uint8_t segment; /* segment referred to (0/1/2) */
int32_t offset; /* offset within segment */
char label[EXIM_LABEL_MAX]; /* zero terminated as in import */
};
/*
* DLL record
*/
struct DLLRec {
uint8_t type; /* must be 4 */
uint8_t reclen; /* content length */
char libname[MODLIB_NAME_MAX]; /* name of library to link with at load time */
};
/*
* BSS record
*/
struct BSSRec {
uint8_t type; /* must be 5 */
uint8_t reclen; /* content length */
int32_t amount; /* number of bytes BSS to reserve */
};
/*
* Module name record
*/
struct ModRec {
uint8_t type; /* must be 8 */
uint8_t reclen; /* content length */
char modname[MODLIB_NAME_MAX]; /* module name */
};
/*
* Common variable record
*/
struct CommonRec {
uint8_t type; /* must be 10 */
uint8_t reclen; /* equals 7+label length */
uint16_t segment; /* segment number */
int32_t size; /* size of common variable */
uint16_t align; /* alignment (power of two) */
char label[EXIM_LABEL_MAX]; /* zero terminated as in import */
};
/* Flags for ExportRec */
#define SYM_DATA 1
#define SYM_FUNCTION 2
#define SYM_GLOBAL 4
#define SYM_IMPORT 8
#endif /* RDOFF_H */
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