rdoff.h
资源名称:nasm-0.98.zip [点击查看]
上传用户:yuppie_zhu
上传日期:2007-01-08
资源大小:535k
文件大小:4k
源码类别:
编译器/解释器
开发平台:
C/C++
- /* rdoff.h RDOFF Object File manipulation routines header file
- *
- * The Netwide Assembler is copyright (C) 1996 Simon Tatham and
- * Julian Hall. All rights reserved. The software is
- * redistributable under the licence given in the file "Licence"
- * distributed in the NASM archive.
- */
- #ifndef _RDOFF_H
- #define _RDOFF_H "RDOFF1 support routines v0.1"
- typedef short int16; /* not sure if this will be required to be altered
- at all... best to typedef it just in case */
- /* the records that can be found in the RDOFF header */
- struct RelocRec {
- char type; /* must be 1 */
- char segment; /* only 0 for code, or 1 for data supported,
- but add 64 for relative refs (ie do not require
- reloc @ loadtime, only linkage) */
- long offset; /* from start of segment in which reference is loc'd */
- char length; /* 1 2 or 4 bytes */
- int16 refseg; /* segment to which reference refers to */
- };
- struct ImportRec {
- char type; /* must be 2 */
- int16 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[33]; /* zero terminated... should be written to file until
- the zero, but not after it - max len = 32 chars */
- };
- struct ExportRec {
- char type; /* must be 3 */
- char segment; /* segment referred to (0/1) */
- long offset; /* offset within segment */
- char label[33]; /* zero terminated as above. max len = 32 chars */
- };
- struct DLLRec {
- char type; /* must be 4 */
- char libname[128]; /* name of library to link with at load time */
- };
- struct BSSRec {
- char type; /* must be 5 */
- long amount; /* number of bytes BSS to reserve */
- };
- typedef union RDFHeaderRec {
- char type; /* invariant throughout all below */
- struct RelocRec r; /* type == 1 */
- struct ImportRec i; /* type == 2 */
- struct ExportRec e; /* type == 3 */
- struct DLLRec d; /* type == 4 */
- struct BSSRec b; /* type == 5 */
- } rdfheaderrec;
- typedef struct RDFFileInfo {
- FILE *fp; /* file descriptor; must be open to use this struct */
- int rdoff_ver; /* should be 1; any higher => not guaranteed to work */
- long header_len;
- long code_len;
- long data_len;
- long header_ofs;
- long code_ofs;
- long data_ofs;
- char *header_loc; /* keep location of header */
- long header_fp; /* current location within header for reading */
- char *name; /* name of module in libraries */
- int *refcount; /* pointer to reference count on file, or NULL */
- } rdffile;
- #define BUF_BLOCK_LEN 4088 /* selected to match page size (4096)
- * on 80x86 machines for efficiency */
- typedef struct memorybuffer {
- int length;
- char buffer[BUF_BLOCK_LEN];
- struct memorybuffer *next;
- } memorybuffer;
- typedef memorybuffer rdf_headerbuf;
- /* segments used by RDOFF, understood by rdoffloadseg */
- #define RDOFF_CODE 0
- #define RDOFF_DATA 1
- #define RDOFF_HEADER -1
- /* mask for 'segment' in relocation records to find if relative relocation */
- #define RDOFF_RELATIVEMASK 64
- /* mask to find actual segment value in relocation records */
- #define RDOFF_SEGMENTMASK 63
- extern int rdf_errno;
- /* RDOFF file manipulation functions */
- int rdfopen(rdffile *f,const char *name);
- int rdfopenhere(rdffile *f, FILE *fp, int *refcount, char *name);
- int rdfclose(rdffile *f);
- int rdfloadseg(rdffile *f,int segment,void *buffer);
- rdfheaderrec *rdfgetheaderrec(rdffile *f); /* returns static storage */
- void rdfheaderrewind(rdffile *f); /* back to start of header */
- void rdfperror(const char *app,const char *name);
- /* functions to write a new RDOFF header to a file -
- use rdfnewheader to allocate a header, rdfaddheader to add records to it,
- rdfwriteheader to write 'RDOFF1', length of header, and the header itself
- to a file, and then rdfdoneheader to dispose of the header */
- rdf_headerbuf *rdfnewheader(void);
- int rdfaddheader(rdf_headerbuf *h,rdfheaderrec *r);
- int rdfwriteheader(FILE *fp,rdf_headerbuf *h);
- void rdfdoneheader(rdf_headerbuf *h);
- #endif /* _RDOFF_H */