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author | K. Richard Pixley <rich@cygnus> | 1992-12-08 04:44:16 +0000 |
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committer | K. Richard Pixley <rich@cygnus> | 1992-12-08 04:44:16 +0000 |
commit | 181ba9ee43a139cd35cd6d6936cf3b780d911a9f (patch) | |
tree | 0c87c2d9e2f775f382888519daa021a38ef5bead /include/aout64.h | |
parent | 7b21432fde421b756b8cd4a38d145108abe7e49c (diff) | |
download | gdb-181ba9ee43a139cd35cd6d6936cf3b780d911a9f.zip gdb-181ba9ee43a139cd35cd6d6936cf3b780d911a9f.tar.gz gdb-181ba9ee43a139cd35cd6d6936cf3b780d911a9f.tar.bz2 |
recording file death
Diffstat (limited to 'include/aout64.h')
-rwxr-xr-x | include/aout64.h | 379 |
1 files changed, 0 insertions, 379 deletions
diff --git a/include/aout64.h b/include/aout64.h deleted file mode 100755 index 3a915a2..0000000 --- a/include/aout64.h +++ /dev/null @@ -1,379 +0,0 @@ -/* `a.out' object-file definitions, including extensions to 64-bit fields */ - -#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. */ - -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. */ -#else -#define OMAGIC 0407 /* ...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) - -/* 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 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.) - */ - -#ifndef N_HEADER_IN_TEXT -#define N_HEADER_IN_TEXT(x) (((x).a_entry & (PAGE_SIZE-1)) >= EXEC_BYTES_SIZE) -#endif - -#ifndef N_TXTADDR -#define N_TXTADDR(x) \ - ( (N_MAGIC(x) != ZMAGIC)? \ - 0: /* object file or NMAGIC */\ - ((x).a_entry < TEXT_START_ADDR)? \ - 0: /* shared lib */\ - (N_HEADER_IN_TEXT(x) ? \ - TEXT_START_ADDR + EXEC_BYTES_SIZE: /* no padding */\ - TEXT_START_ADDR /* a page of padding */\ - ) \ - ) -#endif - -/* Offset in an a.out of the start of the text section. */ - -#define N_TXTOFF(x) \ - ( (N_MAGIC(x) != ZMAGIC)? \ - EXEC_BYTES_SIZE: /* object file or NMAGIC */\ - ((x).a_entry < TEXT_START_ADDR)? \ - 0: /* shared lib */\ - (N_HEADER_IN_TEXT(x) ? \ - EXEC_BYTES_SIZE: /* no padding */\ - PAGE_SIZE /* a page of padding */\ - ) \ - ) - -/* 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 NMAGIC/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.) */ - -#define N_TXTSIZE(x) \ - ( (N_MAGIC(x) != ZMAGIC)? \ - (x).a_text: /* object file or NMAGIC */\ - ((x).a_entry < TEXT_START_ADDR)? \ - (x).a_text: /* shared lib */\ - (N_HEADER_IN_TEXT(x) ? \ - (x).a_text - EXEC_BYTES_SIZE: /* no padding */\ - (x).a_text /* a page of padding */\ - ) \ - ) - -/* 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. */ - -#define N_DATADDR(x) \ - (N_MAGIC(x)==OMAGIC? (N_TXTADDR(x)+N_TXTSIZE(x)) \ - : (N_SEGSIZE(x) + ((N_TXTADDR(x)+N_TXTSIZE(x)-1) & ~(N_SEGSIZE(x)-1)))) - -/* 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. */ - -#define N_DATOFF(x) ( N_TXTOFF(x) + N_TXTSIZE(x) ) -#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 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) - -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 - -/* 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 - -/* 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 *//*v9*/ - - RELOC_64, /* data[0:63] = addend + sv *//*v9*/ - RELOC_DISP64, /* data[0:63] = addend - pc + sv *//*v9*/ - RELOC_WDISP21, /* data[0:20] = (addend + sv - pc)>>2 *//*v9*/ - RELOC_DISP21, /* data[0:20] = addend - pc + sv *//*v9*/ - RELOC_DISP14, /* data[0:13] = addend - pc + sv *//*v9*/ - /* 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__ */ |