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- #ifndef __A_OUT_64_H__
- #define __A_OUT_64_H__
-
-
- /* This is the layout on disk of the 64 bit exec header. */
-
- struct external_exec
- {
- bfd_byte e_info[4]; /* magic number and stuff */
- bfd_byte e_text[BYTES_IN_WORD]; /* length of text section in bytes */
- bfd_byte e_data[BYTES_IN_WORD]; /* length of data section in bytes */
- bfd_byte e_bss[BYTES_IN_WORD]; /* length of bss area in bytes */
- bfd_byte e_syms[BYTES_IN_WORD]; /* length of symbol table in bytes */
- bfd_byte e_entry[BYTES_IN_WORD]; /* start address */
- bfd_byte e_trsize[BYTES_IN_WORD]; /* length of text relocation info */
- bfd_byte e_drsize[BYTES_IN_WORD]; /* length of data relocation info */
- };
-
-
- #define EXEC_BYTES_SIZE (4 + BYTES_IN_WORD * 7)
-
- /* This is the layout in memory of a "struct exec" while we process it. */
- struct internal_exec
- {
- long a_info; /* Magic number and flags packed */
- bfd_vma a_text; /* length of text, in bytes */
- bfd_vma a_data; /* length of data, in bytes */
- bfd_vma a_bss; /* length of uninitialized data area for file */
- bfd_vma a_syms; /* length of symbol table data in file */
- bfd_vma a_entry; /* start address */
- bfd_vma a_trsize; /* length of relocation info for text, in bytes */
- bfd_vma a_drsize; /* length of relocation info for data, in bytes */
- };
-
-
- /* Magic number is written
- < MSB >
- 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
- < FLAGS > < MACHINE TYPE > < MAGIC >
- */
- enum machine_type {
- M_UNKNOWN = 0,
- M_68010 = 1,
- M_68020 = 2,
- M_SPARC = 3,
- /* skip a bunch so we dont run into any of suns numbers */
- M_386 = 100,
- M_29K = 101,
- M_NEWONE = 200,
- M_NEWTWO = 201,
-
- };
-
- #define N_DYNAMIC(exec) ((exec).a_info & 0x8000000)
-
- #define N_MAGIC(exec) ((exec).a_info & 0xffff)
- #define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
- #define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
- #define N_SET_INFO(exec, magic, type, flags) \
- ((exec).a_info = ((magic) & 0xffff) \
- | (((int)(type) & 0xff) << 16) \
- | (((flags) & 0xff) << 24))
-
- #define N_SET_MAGIC(exec, magic) \
- ((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff)))
-
- #define N_SET_MACHTYPE(exec, machtype) \
- ((exec).a_info = \
- ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))
-
- #define N_SET_FLAGS(exec, flags) \
- ((exec).a_info = \
- ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
-
- #define _N_HDROFF(x) (SEGMENT_SIZE - EXEC_BYTES_SIZE)
- /* address in an a.out of the text section. When demand paged, it's
- set up a bit to make nothing at 0, when an object file it's 0.
- There's a special hack case when the entry point is < TEXT_START_ADDR
- for executables, then the real start is 0
- */
-
- #define N_TXTADDR(x) \
- (N_MAGIC(x)==OMAGIC? 0 \
- : (N_MAGIC(x) == ZMAGIC && (x).a_entry < TEXT_START_ADDR)? 0 \
- : TEXT_START_ADDR)
-
- /* offset in an a.out of the start of the text section. When demand
- paged, this is the start of the file
- */
-
- #define N_TXTOFF(x) ( (N_MAGIC((x)) == ZMAGIC) ? 0 : EXEC_BYTES_SIZE)
- #if ARCH_SIZE==64
- #define PAGE_SIZE 0x2000
- #define OMAGIC 0x1001 /* Code indicating object file */
- #define ZMAGIC 0x1002 /* Code indicating demand-paged executable. */
- #define NMAGIC 0x1003 /* Code indicating pure executable. */
- #else
- #ifndef PAGE_SIZE
- #define PAGE_SIZE 0x2000
- #endif
- #define OMAGIC 0407 /* Code indicating object file or impure executable. */
- #define NMAGIC 0410 /* Code indicating pure executable. */
- #define ZMAGIC 0413 /* Code indicating demand-paged executable. */
- #endif
-
- #define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \
- && N_MAGIC(x) != NMAGIC \
- && N_MAGIC(x) != ZMAGIC)
-
-
-
- #define N_DATADDR(x) \
- (N_MAGIC(x)==OMAGIC? (N_TXTADDR(x)+(x).a_text) \
- : (SEGMENT_SIZE + ((N_TXTADDR(x)+(x).a_text-1) & ~(SEGMENT_SIZE-1))))
-
- #define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
-
-
- #define N_DATOFF(x) ( N_TXTOFF(x) + (x).a_text )
- #define N_TRELOFF(x) ( N_DATOFF(x) + (x).a_data )
- #define N_DRELOFF(x) ( N_TRELOFF(x) + (x).a_trsize )
- #define N_SYMOFF(x) ( N_DRELOFF(x) + (x).a_drsize )
- #define N_STROFF(x) ( N_SYMOFF(x) + (x).a_syms )
-
-
- /* Symbols */
- struct external_nlist {
- bfd_byte e_strx[BYTES_IN_WORD]; /* index into string table of symbol name */
- bfd_byte e_type[1]; /* type of symbol */
- bfd_byte e_other[1]; /* misc info (usually empty) */
- bfd_byte e_desc[2]; /* description field */
- bfd_byte e_value[BYTES_IN_WORD];/* value of symbol */
- };
-
- #define EXTERNAL_LIST_SIZE (BYTES_IN_WORD+4+BYTES_IN_WORD)
- struct internal_nlist {
- char *strx; /* index into string table of symbol name */
- uint8_type n_type; /* type of symbol */
- uint8_type n_other; /* misc info (usually empty) */
- uint16_type n_desc; /* description field */
- bfd_vma n_value; /* value of symbol */
- };
-
- /* The n_type field is packed :
-
- 7 6 5 4 3 2 1 0
- ^- if set the symbol is externaly visible
- 0 local
- 1 N_EXT external
- ^ ^ ^---- select which section the symbol belongs to
- 0 0 0 0 x N_UNDF, undefined
- 0 0 0 1 x N_ABS, no section, base at 0
- 0 0 1 0 x N_TEXT, text section
- 0 0 1 1 x N_DATA, data section
- 0 1 0 0 x N_BSS, bss section
- ^---------- if set the symbol is a set element
- 1 0 1 0 x N_SETA absolute set element symbol
- 1 0 1 1 x N_SETT text set element symbol
- 1 1 0 0 x N_SETD data set element symbol
- 1 1 0 1 x N_SETB bss set element symbol
- 1 1 1 0 x N_SETV pointer to set vector in data area
- 1 1 1 1 0 N_TYPE mask for all of the above
-
- 1 1 1 0 0 0 0 0 N_STAB type is a stab
- */
-
- #define N_UNDF 0
- #define N_ABS 2
- #define N_TEXT 4
- #define N_DATA 6
- #define N_BSS 8
- #define N_FN 15
- #define N_EXT 1
- #define N_TYPE 0x1e
- #define N_STAB 0xe0
-
- /* The following symbols refer to set elements.
- All the N_SET[ATDB] symbols with the same name form one set.
- Space is allocated for the set in the text section, and each set
- elements value is stored into one word of the space.
- The first word of the space is the length of the set (number of elements).
-
- The address of the set is made into an N_SETV symbol
- whose name is the same as the name of the set.
- This symbol acts like a N_DATA global symbol
- in that it can satisfy undefined external references. */
-
- /* These appear as input to LD, in a .o file. */
- #define N_SETA 0x14 /* Absolute set element symbol */
- #define N_SETT 0x16 /* Text set element symbol */
- #define N_SETD 0x18 /* Data set element symbol */
- #define N_SETB 0x1A /* Bss set element symbol */
-
- /* This is output from LD. */
- #define N_SETV 0x1C /* Pointer to set vector in data area. */
-
-
- /* Relocations
-
- There are two types of relocation flavours for a.out systems,
- standard and extended. The standard form is used on systems where
- the instruction has room for all the bits of an offset to the operand, whilst the
- extended form is used when an address operand has to be split over n
- instructions. Eg, on the 68k, each move instruction can reference
- the target with a displacement of 16 or 32 bits. On the sparc, move
- instructions use an offset of 14 bits, so the offset is stored in
- the reloc field, and the data in the section is ignored.
- */
-
- /* This structure describes a single relocation to be performed.
- The text-relocation section of the file is a vector of these structures,
- all of which apply to the text section.
- Likewise, the data-relocation section applies to the data section. */
-
- struct reloc_std_external {
- bfd_byte r_address[BYTES_IN_WORD]; /* offset of of data to relocate */
- bfd_byte r_index[3]; /* symbol table index of symbol */
- bfd_byte r_type[1]; /* relocation type */
- };
-
- #define RELOC_STD_BITS_PCREL_BIG 0x80
- #define RELOC_STD_BITS_PCREL_LITTLE 0x01
-
- #define RELOC_STD_BITS_LENGTH_BIG 0x60
- #define RELOC_STD_BITS_LENGTH_SH_BIG 5 /* To shift to units place */
- #define RELOC_STD_BITS_LENGTH_LITTLE 0x06
- #define RELOC_STD_BITS_LENGTH_SH_LITTLE 1
-
- #define RELOC_STD_BITS_EXTERN_BIG 0x10
- #define RELOC_STD_BITS_EXTERN_LITTLE 0x08
-
- #define RELOC_STD_BITS_BASEREL_BIG 0x08
- #define RELOC_STD_BITS_BASEREL_LITTLE 0x08
-
- #define RELOC_STD_BITS_JMPTABLE_BIG 0x04
- #define RELOC_STD_BITS_JMPTABLE_LITTLE 0x04
-
- #define RELOC_STD_BITS_RELATIVE_BIG 0x02
- #define RELOC_STD_BITS_RELATIVE_LITTLE 0x02
-
- #define RELOC_STD_SIZE (BYTES_IN_WORD + 3 + 1) /* Bytes per relocation entry */
-
- struct reloc_std_internal
- {
- bfd_vma r_address; /* Address (within segment) to be relocated. */
- /* The meaning of r_symbolnum depends on r_extern. */
- unsigned int r_symbolnum:24;
- /* Nonzero means value is a pc-relative offset
- and it should be relocated for changes in its own address
- as well as for changes in the symbol or section specified. */
- unsigned int r_pcrel:1;
- /* Length (as exponent of 2) of the field to be relocated.
- Thus, a value of 2 indicates 1<<2 bytes. */
- unsigned int r_length:2;
- /* 1 => relocate with value of symbol.
- r_symbolnum is the index of the symbol
- in files the symbol table.
- 0 => relocate with the address of a segment.
- r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
- (the N_EXT bit may be set also, but signifies nothing). */
- unsigned int r_extern:1;
- /* The next three bits are for SunOS shared libraries, and seem to
- be undocumented. */
- unsigned int r_baserel:1; /* Linkage table relative */
- unsigned int r_jmptable:1; /* pc-relative to jump table */
- unsigned int r_relative:1; /* "relative relocation" */
- /* unused */
- unsigned int r_pad:1; /* Padding -- set to zero */
- };
-
-
- /* EXTENDED RELOCS */
-
- struct reloc_ext_external {
- bfd_byte r_address[BYTES_IN_WORD]; /* offset of of data to relocate */
- bfd_byte r_index[3]; /* symbol table index of symbol */
- bfd_byte r_type[1]; /* relocation type */
- bfd_byte r_addend[BYTES_IN_WORD]; /* datum addend */
- };
-
- #define RELOC_EXT_BITS_EXTERN_BIG 0x80
- #define RELOC_EXT_BITS_EXTERN_LITTLE 0x01
-
- #define RELOC_EXT_BITS_TYPE_BIG 0x1F
- #define RELOC_EXT_BITS_TYPE_SH_BIG 0
- #define RELOC_EXT_BITS_TYPE_LITTLE 0xF8
- #define RELOC_EXT_BITS_TYPE_SH_LITTLE 3
-
- #define RELOC_EXT_SIZE (BYTES_IN_WORD + 3 + 1 + BYTES_IN_WORD) /* Bytes per relocation entry */
-
- enum reloc_type
- {
-
-
-
-
-
- /* simple relocations */
- RELOC_8, /* data[0:7] = addend + sv */
- RELOC_16, /* data[0:15] = addend + sv */
- RELOC_32, /* data[0:31] = addend + sv */
- /* pc-rel displacement */
- RELOC_DISP8, /* data[0:7] = addend - pc + sv */
- RELOC_DISP16, /* data[0:15] = addend - pc + sv */
- RELOC_DISP32, /* data[0:31] = addend - pc + sv */
- /* Special */
- RELOC_WDISP30, /* data[0:29] = (addend + sv - pc)>>2 */
- RELOC_WDISP22, /* data[0:21] = (addend + sv - pc)>>2 */
- RELOC_HI22, /* data[0:21] = (addend + sv)>>10 */
- RELOC_22, /* data[0:21] = (addend + sv) */
- RELOC_13, /* data[0:12] = (addend + sv) */
- RELOC_LO10, /* data[0:9] = (addend + sv) */
- RELOC_SFA_BASE,
- RELOC_SFA_OFF13,
- /* P.I.C. (base-relative) */
- RELOC_BASE10, /* Not sure - maybe we can do this the */
- RELOC_BASE13, /* right way now */
- RELOC_BASE22,
- /* for some sort of pc-rel P.I.C. (?) */
- RELOC_PC10,
- RELOC_PC22,
- /* P.I.C. jump table */
- RELOC_JMP_TBL,
- /* reputedly for shared libraries somehow */
- RELOC_SEGOFF16,
- RELOC_GLOB_DAT,
- RELOC_JMP_SLOT,
- RELOC_RELATIVE,
-
- RELOC_11,
- RELOC_WDISP2_14,
- RELOC_WDISP19,
- RELOC_HHI22, /* data[0:21] = (addend + sv) >> 42 */
- RELOC_HLO10, /* data[0:9] = (addend + sv) >> 32 */
-
- /* 29K relocation types */
- RELOC_JUMPTARG,
- RELOC_CONST,
- RELOC_CONSTH,
-
-
- /* Q .
- What are the other ones,
- Since this is a clean slate, can we throw away the ones we dont
- understand ? Should we sort the values ? What about using a
- microcode format like the 68k ?
- */
- NO_RELOC
- };
-
-
- struct reloc_internal {
- bfd_vma r_address; /* offset of of data to relocate */
- long r_index; /* symbol table index of symbol */
- enum reloc_type r_type; /* relocation type */
- bfd_vma r_addend; /* datum addend */
- };
-
- /* Q.
- Should the length of the string table be 4 bytes or 8 bytes ?
-
- Q.
- What about archive indexes ?
-
- */
-
- #endif /* __A_OUT_GNU_H__ */
-