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Diffstat (limited to 'include/aout/aout64.h')
| -rw-r--r-- | include/aout/aout64.h | 516 |
1 files changed, 0 insertions, 516 deletions
diff --git a/include/aout/aout64.h b/include/aout/aout64.h deleted file mode 100644 index bc96d2a77..000000000 --- a/include/aout/aout64.h +++ /dev/null @@ -1,516 +0,0 @@ -/* `a.out' object-file definitions, including extensions to 64-bit fields - - Copyright 2001 Free Software Foundation, Inc. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - -#ifndef __A_OUT_64_H__ -#define __A_OUT_64_H__ - -/* This is the layout on disk of the 32-bit or 64-bit exec header. */ - -#ifndef external_exec -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) - -/* Magic numbers for a.out files */ - -#if ARCH_SIZE==64 -#define OMAGIC 0x1001 /* Code indicating object file */ -#define ZMAGIC 0x1002 /* Code indicating demand-paged executable. */ -#define NMAGIC 0x1003 /* Code indicating pure executable. */ - -/* There is no 64-bit QMAGIC as far as I know. */ - -#define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \ - && N_MAGIC(x) != NMAGIC \ - && N_MAGIC(x) != ZMAGIC) -#else -#define OMAGIC 0407 /* ...object file or impure executable. */ -#define NMAGIC 0410 /* Code indicating pure executable. */ -#define ZMAGIC 0413 /* Code indicating demand-paged executable. */ -#define BMAGIC 0415 /* Used by a b.out object. */ - -/* This indicates a demand-paged executable with the header in the text. - It is used by 386BSD (and variants) and Linux, at least. */ -#ifndef QMAGIC -#define QMAGIC 0314 -#endif -# ifndef N_BADMAG -# define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \ - && N_MAGIC(x) != NMAGIC \ - && N_MAGIC(x) != ZMAGIC \ - && N_MAGIC(x) != QMAGIC) -# endif /* N_BADMAG */ -#endif - -#endif - -#ifdef QMAGIC -#define N_IS_QMAGIC(x) (N_MAGIC (x) == QMAGIC) -#else -#define N_IS_QMAGIC(x) (0) -#endif - -/* The difference between TARGET_PAGE_SIZE and N_SEGSIZE is that TARGET_PAGE_SIZE is - the finest granularity at which you can page something, thus it - controls the padding (if any) before the text segment of a ZMAGIC - file. N_SEGSIZE is the resolution at which things can be marked as - read-only versus read/write, so it controls the padding between the - text segment and the data segment (in memory; on disk the padding - between them is TARGET_PAGE_SIZE). TARGET_PAGE_SIZE and N_SEGSIZE are the same - for most machines, but different for sun3. */ - -/* By default, segment size is constant. But some machines override this - to be a function of the a.out header (e.g. machine type). */ - -#ifndef N_SEGSIZE -#define N_SEGSIZE(x) SEGMENT_SIZE -#endif - -/* Virtual memory address of the text section. - This is getting very complicated. A good reason to discard a.out format - for something that specifies these fields explicitly. But til then... - - * OMAGIC and NMAGIC files: - (object files: text for "relocatable addr 0" right after the header) - start at 0, offset is EXEC_BYTES_SIZE, size as stated. - * The text address, offset, and size of ZMAGIC files depend - on the entry point of the file: - * entry point below TEXT_START_ADDR: - (hack for SunOS shared libraries) - start at 0, offset is 0, size as stated. - * If N_HEADER_IN_TEXT(x) is true (which defaults to being the - case when the entry point is EXEC_BYTES_SIZE or further into a page): - no padding is needed; text can start after exec header. Sun - considers the text segment of such files to include the exec header; - for BFD's purposes, we don't, which makes more work for us. - start at TEXT_START_ADDR + EXEC_BYTES_SIZE, offset is EXEC_BYTES_SIZE, - size as stated minus EXEC_BYTES_SIZE. - * If N_HEADER_IN_TEXT(x) is false (which defaults to being the case when - the entry point is less than EXEC_BYTES_SIZE into a page (e.g. page - aligned)): (padding is needed so that text can start at a page boundary) - start at TEXT_START_ADDR, offset TARGET_PAGE_SIZE, size as stated. - - Specific configurations may want to hardwire N_HEADER_IN_TEXT, - for efficiency or to allow people to play games with the entry point. - In that case, you would #define N_HEADER_IN_TEXT(x) as 1 for sunos, - and as 0 for most other hosts (Sony News, Vax Ultrix, etc). - (Do this in the appropriate bfd target file.) - (The default is a heuristic that will break if people try changing - the entry point, perhaps with the ld -e flag.) - - * QMAGIC is always like a ZMAGIC for which N_HEADER_IN_TEXT is true, - and for which the starting address is TARGET_PAGE_SIZE (or should this be - SEGMENT_SIZE?) (TEXT_START_ADDR only applies to ZMAGIC, not to QMAGIC). - */ - -/* This macro is only relevant for ZMAGIC files; QMAGIC always has the header - in the text. */ -#ifndef N_HEADER_IN_TEXT -#define N_HEADER_IN_TEXT(x) \ - (((x).a_entry & (TARGET_PAGE_SIZE-1)) >= EXEC_BYTES_SIZE) -#endif - -/* Sun shared libraries, not linux. This macro is only relevant for ZMAGIC - files. */ -#ifndef N_SHARED_LIB -#if defined (TEXT_START_ADDR) && TEXT_START_ADDR == 0 -#define N_SHARED_LIB(x) (0) -#else -#define N_SHARED_LIB(x) ((x).a_entry < TEXT_START_ADDR) -#endif -#endif - -/* Returning 0 not TEXT_START_ADDR for OMAGIC and NMAGIC is based on - the assumption that we are dealing with a .o file, not an - executable. This is necessary for OMAGIC (but means we don't work - right on the output from ld -N); more questionable for NMAGIC. */ - -#ifndef N_TXTADDR -#define N_TXTADDR(x) \ - (/* The address of a QMAGIC file is always one page in, */ \ - /* with the header in the text. */ \ - N_IS_QMAGIC (x) \ - ? (bfd_vma) TARGET_PAGE_SIZE + EXEC_BYTES_SIZE \ - : (N_MAGIC (x) != ZMAGIC \ - ? (bfd_vma) 0 /* object file or NMAGIC */ \ - : (N_SHARED_LIB (x) \ - ? (bfd_vma) 0 \ - : (N_HEADER_IN_TEXT (x) \ - ? (bfd_vma) TEXT_START_ADDR + EXEC_BYTES_SIZE \ - : (bfd_vma) TEXT_START_ADDR)))) -#endif - -/* If N_HEADER_IN_TEXT is not true for ZMAGIC, there is some padding - to make the text segment start at a certain boundary. For most - systems, this boundary is TARGET_PAGE_SIZE. But for Linux, in the - time-honored tradition of crazy ZMAGIC hacks, it is 1024 which is - not what TARGET_PAGE_SIZE needs to be for QMAGIC. */ - -#ifndef ZMAGIC_DISK_BLOCK_SIZE -#define ZMAGIC_DISK_BLOCK_SIZE TARGET_PAGE_SIZE -#endif - -#define N_DISK_BLOCK_SIZE(x) \ - (N_MAGIC(x) == ZMAGIC ? ZMAGIC_DISK_BLOCK_SIZE : TARGET_PAGE_SIZE) - -/* Offset in an a.out of the start of the text section. */ -#ifndef N_TXTOFF -#define N_TXTOFF(x) \ - (/* For {O,N,Q}MAGIC, no padding. */ \ - N_MAGIC (x) != ZMAGIC \ - ? EXEC_BYTES_SIZE \ - : (N_SHARED_LIB (x) \ - ? 0 \ - : (N_HEADER_IN_TEXT (x) \ - ? EXEC_BYTES_SIZE /* no padding */ \ - : ZMAGIC_DISK_BLOCK_SIZE /* a page of padding */))) -#endif -/* Size of the text section. It's always as stated, except that we - offset it to `undo' the adjustment to N_TXTADDR and N_TXTOFF - for ZMAGIC files that nominally include the exec header - as part of the first page of text. (BFD doesn't consider the - exec header to be part of the text segment.) */ -#ifndef N_TXTSIZE -#define N_TXTSIZE(x) \ - (/* For QMAGIC, we don't consider the header part of the text section. */\ - N_IS_QMAGIC (x) \ - ? (x).a_text - EXEC_BYTES_SIZE \ - : ((N_MAGIC (x) != ZMAGIC || N_SHARED_LIB (x)) \ - ? (x).a_text \ - : (N_HEADER_IN_TEXT (x) \ - ? (x).a_text - EXEC_BYTES_SIZE /* no padding */ \ - : (x).a_text /* a page of padding */ ))) -#endif -/* The address of the data segment in virtual memory. - It is the text segment address, plus text segment size, rounded - up to a N_SEGSIZE boundary for pure or pageable files. */ -#ifndef N_DATADDR -#define N_DATADDR(x) \ - (N_MAGIC (x) == OMAGIC \ - ? (N_TXTADDR (x) + N_TXTSIZE (x)) \ - : (N_SEGSIZE (x) + ((N_TXTADDR (x) + N_TXTSIZE (x) - 1) \ - & ~ (bfd_vma) (N_SEGSIZE (x) - 1)))) -#endif -/* The address of the BSS segment -- immediately after the data segment. */ - -#define N_BSSADDR(x) (N_DATADDR (x) + (x).a_data) - -/* Offsets of the various portions of the file after the text segment. */ - -/* For {Q,Z}MAGIC, there is padding to make the data segment start on - a page boundary. Most of the time the a_text field (and thus - N_TXTSIZE) already contains this padding. It is possible that for - BSDI and/or 386BSD it sometimes doesn't contain the padding, and - perhaps we should be adding it here. But this seems kind of - questionable and probably should be BSDI/386BSD-specific if we do - do it. - - For NMAGIC (at least for hp300 BSD, probably others), there is - padding in memory only, not on disk, so we must *not* ever pad here - for NMAGIC. */ - -#ifndef N_DATOFF -#define N_DATOFF(x) ( N_TXTOFF (x) + N_TXTSIZE (x) ) -#endif -#ifndef N_TRELOFF -#define N_TRELOFF(x) ( N_DATOFF (x) + (x).a_data ) -#endif -#ifndef N_DRELOFF -#define N_DRELOFF(x) ( N_TRELOFF (x) + (x).a_trsize ) -#endif -#ifndef N_SYMOFF -#define N_SYMOFF(x) ( N_DRELOFF (x) + (x).a_drsize ) -#endif -#ifndef N_STROFF -#define N_STROFF(x) ( N_SYMOFF (x) + (x).a_syms ) -#endif - -/* Symbols */ -#ifndef external_nlist -struct external_nlist { - bfd_byte e_strx[BYTES_IN_WORD]; /* index into string table of 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_NLIST_SIZE (BYTES_IN_WORD+4+BYTES_IN_WORD) -#endif - -struct internal_nlist { - unsigned long n_strx; /* index into string table of name */ - unsigned char n_type; /* type of symbol */ - unsigned char n_other; /* misc info (usually empty) */ - unsigned short n_desc; /* description field */ - bfd_vma n_value; /* value of symbol */ -}; - -/* The n_type field is the symbol type, containing: */ - -#define N_UNDF 0 /* Undefined symbol */ -#define N_ABS 2 /* Absolute symbol -- defined at particular addr */ -#define N_TEXT 4 /* Text sym -- defined at offset in text seg */ -#define N_DATA 6 /* Data sym -- defined at offset in data seg */ -#define N_BSS 8 /* BSS sym -- defined at offset in zero'd seg */ -#define N_COMM 0x12 /* Common symbol (visible after shared lib dynlink) */ -#define N_FN 0x1f /* File name of .o file */ -#define N_FN_SEQ 0x0C /* N_FN from Sequent compilers (sigh) */ -/* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT, - N_DATA, or N_BSS. When the low-order bit of other types is set, - (e.g. N_WARNING versus N_FN), they are two different types. */ -#define N_EXT 1 /* External symbol (as opposed to local-to-this-file) */ -#define N_TYPE 0x1e -#define N_STAB 0xe0 /* If any of these bits are on, it's a debug symbol */ - -#define N_INDR 0x0a - -/* 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. */ - -/* Warning symbol. The text gives a warning message, the next symbol - in the table will be undefined. When the symbol is referenced, the - message is printed. */ - -#define N_WARNING 0x1e - -/* Weak symbols. These are a GNU extension to the a.out format. The - semantics are those of ELF weak symbols. Weak symbols are always - externally visible. The N_WEAK? values are squeezed into the - available slots. The value of a N_WEAKU symbol is 0. The values - of the other types are the definitions. */ -#define N_WEAKU 0x0d /* Weak undefined symbol. */ -#define N_WEAKA 0x0e /* Weak absolute symbol. */ -#define N_WEAKT 0x0f /* Weak text symbol. */ -#define N_WEAKD 0x10 /* Weak data symbol. */ -#define N_WEAKB 0x11 /* Weak bss symbol. */ - -/* 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 ((unsigned int) 0x80) -#define RELOC_STD_BITS_PCREL_LITTLE ((unsigned int) 0x01) - -#define RELOC_STD_BITS_LENGTH_BIG ((unsigned int) 0x60) -#define RELOC_STD_BITS_LENGTH_SH_BIG 5 -#define RELOC_STD_BITS_LENGTH_LITTLE ((unsigned int) 0x06) -#define RELOC_STD_BITS_LENGTH_SH_LITTLE 1 - -#define RELOC_STD_BITS_EXTERN_BIG ((unsigned int) 0x10) -#define RELOC_STD_BITS_EXTERN_LITTLE ((unsigned int) 0x08) - -#define RELOC_STD_BITS_BASEREL_BIG ((unsigned int) 0x08) -#define RELOC_STD_BITS_BASEREL_LITTLE ((unsigned int) 0x10) - -#define RELOC_STD_BITS_JMPTABLE_BIG ((unsigned int) 0x04) -#define RELOC_STD_BITS_JMPTABLE_LITTLE ((unsigned int) 0x20) - -#define RELOC_STD_BITS_RELATIVE_BIG ((unsigned int) 0x02) -#define RELOC_STD_BITS_RELATIVE_LITTLE ((unsigned int) 0x40) - -#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 */ -}; - -#ifndef RELOC_EXT_BITS_EXTERN_BIG -#define RELOC_EXT_BITS_EXTERN_BIG ((unsigned int) 0x80) -#endif - -#ifndef RELOC_EXT_BITS_EXTERN_LITTLE -#define RELOC_EXT_BITS_EXTERN_LITTLE ((unsigned int) 0x01) -#endif - -#ifndef RELOC_EXT_BITS_TYPE_BIG -#define RELOC_EXT_BITS_TYPE_BIG ((unsigned int) 0x1F) -#endif - -#ifndef RELOC_EXT_BITS_TYPE_SH_BIG -#define RELOC_EXT_BITS_TYPE_SH_BIG 0 -#endif - -#ifndef RELOC_EXT_BITS_TYPE_LITTLE -#define RELOC_EXT_BITS_TYPE_LITTLE ((unsigned int) 0xF8) -#endif - -#ifndef RELOC_EXT_BITS_TYPE_SH_LITTLE -#define RELOC_EXT_BITS_TYPE_SH_LITTLE 3 -#endif - -/* Bytes per relocation entry */ -#define RELOC_EXT_SIZE (BYTES_IN_WORD + 3 + 1 + BYTES_IN_WORD) - -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, - - /* All the new ones I can think of, for sparc v9 */ - - RELOC_64, /* data[0:63] = addend + sv */ - RELOC_DISP64, /* data[0:63] = addend - pc + sv */ - RELOC_WDISP21, /* data[0:20] = (addend + sv - pc)>>2 */ - RELOC_DISP21, /* data[0:20] = addend - pc + sv */ - RELOC_DISP14, /* data[0:13] = addend - pc + sv */ - /* 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_64_H__ */ |