ef8e6e25e0
the number of types of relocation possible in the object file. (Now, hopefully, working.) Also change the object serialiser/deserialiser to never try to read or write raw structures; it's way safer this way and we don't need the performance boost any more. --HG-- branch : default-branch
125 lines
3.7 KiB
C
125 lines
3.7 KiB
C
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* $Id$ */
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#ifndef __OUT_H_INCLUDED
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#define __OUT_H_INCLUDED
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#include <stdint.h>
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/*
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* output format for ACK assemblers
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*/
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struct outhead {
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uint16_t oh_magic; /* magic number */
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uint16_t oh_stamp; /* version stamp */
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uint16_t oh_flags; /* several format flags */
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uint16_t oh_nsect; /* number of outsect structures */
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uint16_t oh_nrelo; /* number of outrelo structures */
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uint16_t oh_nname; /* number of outname structures */
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uint32_t oh_nemit; /* sum of all os_flen */
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uint32_t oh_nchar; /* size of string area */
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};
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#define O_MAGIC 0x0202 /* magic number of output file */
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#define O_STAMP 0 /* version stamp */
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#define MAXSECT 64 /* Maximum number of sections */
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#define HF_LINK 0x0004 /* unresolved references left */
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#define HF_8086 0x0008 /* os_base specially encoded */
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struct outsect {
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uint32_t os_base; /* startaddress in machine */
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uint32_t os_size; /* section size in machine */
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uint32_t os_foff; /* startaddress in file */
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uint32_t os_flen; /* section size in file */
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uint32_t os_lign; /* section alignment */
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};
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struct outrelo {
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uint16_t or_type; /* type of reference */
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uint16_t or_sect; /* referencing section */
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uint16_t or_nami; /* referenced symbol index */
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uint32_t or_addr; /* referencing address */
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};
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struct outname {
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union {
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char *on_ptr; /* symbol name (in core) */
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long on_off; /* symbol name (in file) */
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} on_u;
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#define on_mptr on_u.on_ptr
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#define on_foff on_u.on_off
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uint16_t on_type; /* symbol type */
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uint16_t on_desc; /* debug info */
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uint32_t on_valu; /* symbol value */
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};
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/*
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* relocation type bits
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*/
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#define RELSZ 0x0fff /* relocation length */
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#define RELO1 1 /* 1 byte */
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#define RELO2 2 /* 2 bytes */
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#define RELO4 3 /* 4 bytes */
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#define RELOPPC 4 /* PowerPC 26-bit address */
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#define RELOH2 5 /* write top 2 bytes of 4 byte word */
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#define RELOVC4 6 /* VideoCore IV address in 32-bit instruction */
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#define RELPC 0x2000 /* pc relative */
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#define RELBR 0x4000 /* High order byte lowest address. */
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#define RELWR 0x8000 /* High order word lowest address. */
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/*
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* section type bits and fields
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*/
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#define S_TYP 0x007F /* undefined, absolute or relative */
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#define S_EXT 0x0080 /* external flag */
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#define S_ETC 0x7F00 /* for symbolic debug, bypassing 'as' */
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/*
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* S_TYP field values
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*/
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#define S_UND 0x0000 /* undefined item */
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#define S_ABS 0x0001 /* absolute item */
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#define S_MIN 0x0002 /* first user section */
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#define S_MAX (S_TYP-1) /* last user section */
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#define S_CRS S_TYP /* on_valu is symbol index which contains value */
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/*
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* S_ETC field values
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*/
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#define S_SCT 0x0100 /* section names */
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#define S_LIN 0x0200 /* hll source line item */
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#define S_FIL 0x0300 /* hll source file item */
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#define S_MOD 0x0400 /* ass source file item */
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#define S_COM 0x1000 /* Common name. */
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#define S_STB 0xe000 /* entries with any of these bits set are
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reserved for debuggers
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*/
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/*
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* structure sizes on disk (bytes in file; add digits in SF_*)
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* Note! These are NOT the sizes in memory (64-bit architectures will have
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* a different layout).
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*/
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#define SZ_HEAD 20
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#define SZ_SECT 20
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#define SZ_RELO 10
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#define SZ_NAME 12
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/*
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* file access macros
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*/
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#define BADMAGIC(x) ((x).oh_magic!=O_MAGIC)
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#define OFF_SECT(x) SZ_HEAD
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#define OFF_EMIT(x) (OFF_SECT(x) + ((long)(x).oh_nsect * SZ_SECT))
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#define OFF_RELO(x) (OFF_EMIT(x) + (x).oh_nemit)
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#define OFF_NAME(x) (OFF_RELO(x) + ((long)(x).oh_nrelo * SZ_RELO))
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#define OFF_CHAR(x) (OFF_NAME(x) + ((long)(x).oh_nname * SZ_NAME))
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#endif /* __OUT_H_INCLUDED */
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