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hellwig |
/*
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* a.out.h -- structure of linkable object and executable files
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*/
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#ifndef _A_OUT_H_
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#define _A_OUT_H_
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#define EXEC_MAGIC 0x1AA09232
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#define METHOD_H16 0 /* write 16 bits with high part of value */
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#define METHOD_L16 1 /* write 16 bits with low part of value */
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#define METHOD_R16 2 /* write 16 bits with value relative to PC */
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#define METHOD_R26 3 /* write 26 bits with value relative to PC */
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#define METHOD_W32 4 /* write full 32 bit word with value */
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#define SEGMENT_ABS 0 /* absolute values */
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#define SEGMENT_CODE 1 /* code segment */
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#define SEGMENT_DATA 2 /* initialized data segment */
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#define SEGMENT_BSS 3 /* uninitialized data segment */
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typedef struct {
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unsigned int magic; /* must be EXEC_MAGIC */
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unsigned int csize; /* size of code in bytes */
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unsigned int dsize; /* size of initialized data in bytes */
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unsigned int bsize; /* size of uninitialized data in bytes */
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unsigned int crsize; /* size of code relocation info in bytes */
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unsigned int drsize; /* size of data relocation info in bytes */
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unsigned int symsize; /* size of symbol table in bytes */
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unsigned int strsize; /* size of string space in bytes */
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} ExecHeader;
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typedef struct {
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unsigned int offset; /* where to relocate */
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int method; /* how to relocate */
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int value; /* additive part of value */
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int base; /* if MSB = 0: segment number */
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/* if MSB = 1: symbol table index */
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} RelocRecord;
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typedef struct {
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unsigned int name; /* offset in string space */
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int type; /* if MSB = 0: the symbol's segment */
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/* if MSB = 1: the symbol is undefined */
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int value; /* if symbol defined: the symbol's value */
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/* if symbol not defined: meaningless */
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} SymbolRecord;
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#endif /* _A_OUT_H_ */
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