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221 lines
5.9 KiB
221 lines
5.9 KiB
2 years ago
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#ifndef _A_OUT_H
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#define _A_OUT_H
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#define __GNU_EXEC_MACROS__
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struct exec {
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unsigned long a_magic; /* Use macros N_MAGIC, etc for access */
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unsigned a_text; /* length of text, in bytes */
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unsigned a_data; /* length of data, in bytes */
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unsigned a_bss; /* length of uninitialized data area for file, in bytes */
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unsigned a_syms; /* length of symbol table data in file, in bytes */
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unsigned a_entry; /* start address */
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unsigned a_trsize; /* length of relocation info for text, in bytes */
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unsigned a_drsize; /* length of relocation info for data, in bytes */
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};
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#ifndef N_MAGIC
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#define N_MAGIC(exec) ((exec).a_magic)
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#endif
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#ifndef OMAGIC
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/* Code indicating object file or impure executable. */
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#define OMAGIC 0407
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/* Code indicating pure executable. */
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#define NMAGIC 0410
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/* Code indicating demand-paged executable. */
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#define ZMAGIC 0413
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#endif /* not OMAGIC */
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#ifndef N_BADMAG
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#define N_BADMAG(x) \
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(N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC \
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&& N_MAGIC(x) != ZMAGIC)
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#endif
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#define _N_BADMAG(x) \
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(N_MAGIC(x) != OMAGIC && N_MAGIC(x) != NMAGIC \
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&& N_MAGIC(x) != ZMAGIC)
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#define _N_HDROFF(x) (SEGMENT_SIZE - sizeof (struct exec))
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#ifndef N_TXTOFF
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#define N_TXTOFF(x) \
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(N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : sizeof (struct exec))
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#endif
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#ifndef N_DATOFF
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#define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text)
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#endif
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#ifndef N_TRELOFF
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#define N_TRELOFF(x) (N_DATOFF(x) + (x).a_data)
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#endif
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#ifndef N_DRELOFF
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#define N_DRELOFF(x) (N_TRELOFF(x) + (x).a_trsize)
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#endif
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#ifndef N_SYMOFF
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#define N_SYMOFF(x) (N_DRELOFF(x) + (x).a_drsize)
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#endif
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#ifndef N_STROFF
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#define N_STROFF(x) (N_SYMOFF(x) + (x).a_syms)
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#endif
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/* Address of text segment in memory after it is loaded. */
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#ifndef N_TXTADDR
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#define N_TXTADDR(x) 0
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#endif
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/* Address of data segment in memory after it is loaded.
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Note that it is up to you to define SEGMENT_SIZE
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on machines not listed here. */
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#if defined(vax) || defined(hp300) || defined(pyr)
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#define SEGMENT_SIZE PAGE_SIZE
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#endif
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#ifdef hp300
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#define PAGE_SIZE 4096
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#endif
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#ifdef sony
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#define SEGMENT_SIZE 0x2000
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#endif /* Sony. */
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#ifdef is68k
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#define SEGMENT_SIZE 0x20000
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#endif
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#if defined(m68k) && defined(PORTAR)
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#define PAGE_SIZE 0x400
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#define SEGMENT_SIZE PAGE_SIZE
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#endif
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#define PAGE_SIZE 4096
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#define SEGMENT_SIZE 1024
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#define _N_SEGMENT_ROUND(x) (((x) + SEGMENT_SIZE - 1) & ~(SEGMENT_SIZE - 1))
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#define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
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#ifndef N_DATADDR
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#define N_DATADDR(x) \
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(N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
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: (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
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#endif
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/* Address of bss segment in memory after it is loaded. */
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#ifndef N_BSSADDR
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#define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
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#endif
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#ifndef N_NLIST_DECLARED
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struct nlist {
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union {
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char *n_name;
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struct nlist *n_next;
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long n_strx;
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} n_un;
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unsigned char n_type;
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char n_other;
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short n_desc;
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unsigned long n_value;
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};
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#endif
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#ifndef N_UNDF
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#define N_UNDF 0
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#endif
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#ifndef N_ABS
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#define N_ABS 2
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#endif
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#ifndef N_TEXT
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#define N_TEXT 4
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#endif
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#ifndef N_DATA
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#define N_DATA 6
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#endif
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#ifndef N_BSS
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#define N_BSS 8
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#endif
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#ifndef N_COMM
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#define N_COMM 18
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#endif
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#ifndef N_FN
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#define N_FN 15
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#endif
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#ifndef N_EXT
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#define N_EXT 1
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#endif
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#ifndef N_TYPE
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#define N_TYPE 036
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#endif
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#ifndef N_STAB
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#define N_STAB 0340
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#endif
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/* The following type indicates the definition of a symbol as being
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an indirect reference to another symbol. The other symbol
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appears as an undefined reference, immediately following this symbol.
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Indirection is asymmetrical. The other symbol's value will be used
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to satisfy requests for the indirect symbol, but not vice versa.
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If the other symbol does not have a definition, libraries will
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be searched to find a definition. */
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#define N_INDR 0xa
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/* The following symbols refer to set elements.
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All the N_SET[ATDB] symbols with the same name form one set.
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Space is allocated for the set in the text section, and each set
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element's value is stored into one word of the space.
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The first word of the space is the length of the set (number of elements).
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The address of the set is made into an N_SETV symbol
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whose name is the same as the name of the set.
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This symbol acts like a N_DATA global symbol
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in that it can satisfy undefined external references. */
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/* These appear as input to LD, in a .o file. */
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#define N_SETA 0x14 /* Absolute set element symbol */
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#define N_SETT 0x16 /* Text set element symbol */
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#define N_SETD 0x18 /* Data set element symbol */
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#define N_SETB 0x1A /* Bss set element symbol */
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/* This is output from LD. */
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#define N_SETV 0x1C /* Pointer to set vector in data area. */
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#ifndef N_RELOCATION_INFO_DECLARED
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/* This structure describes a single relocation to be performed.
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The text-relocation section of the file is a vector of these structures,
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all of which apply to the text section.
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Likewise, the data-relocation section applies to the data section. */
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struct relocation_info
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{
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/* Address (within segment) to be relocated. */
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int r_address;
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/* The meaning of r_symbolnum depends on r_extern. */
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unsigned int r_symbolnum:24;
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/* Nonzero means value is a pc-relative offset
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and it should be relocated for changes in its own address
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as well as for changes in the symbol or section specified. */
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unsigned int r_pcrel:1;
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/* Length (as exponent of 2) of the field to be relocated.
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Thus, a value of 2 indicates 1<<2 bytes. */
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unsigned int r_length:2;
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/* 1 => relocate with value of symbol.
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r_symbolnum is the index of the symbol
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in file's the symbol table.
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0 => relocate with the address of a segment.
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r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
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(the N_EXT bit may be set also, but signifies nothing). */
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unsigned int r_extern:1;
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/* Four bits that aren't used, but when writing an object file
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it is desirable to clear them. */
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unsigned int r_pad:4;
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};
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#endif /* no N_RELOCATION_INFO_DECLARED. */
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#endif /* __A_OUT_GNU_H__ */
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