diff options
Diffstat (limited to 'include/aout/aout64.h')
| -rw-r--r-- | include/aout/aout64.h | 187 |
1 files changed, 95 insertions, 92 deletions
diff --git a/include/aout/aout64.h b/include/aout/aout64.h index bc96d2a..4843410 100644 --- a/include/aout/aout64.h +++ b/include/aout/aout64.h @@ -1,6 +1,6 @@ /* `a.out' object-file definitions, including extensions to 64-bit fields - Copyright 2001 Free Software Foundation, Inc. + Copyright 2001, 2003 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 @@ -19,27 +19,31 @@ #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 BYTES_IN_WORD +#define BYTES_IN_WORD 4 +#endif + +/* 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 */ + 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 */ +/* Magic numbers for a.out files. */ #if ARCH_SIZE==64 -#define OMAGIC 0x1001 /* Code indicating object file */ +#define OMAGIC 0x1001 /* Code indicating object file. */ #define ZMAGIC 0x1002 /* Code indicating demand-paged executable. */ #define NMAGIC 0x1003 /* Code indicating pure executable. */ @@ -49,7 +53,7 @@ struct external_exec && N_MAGIC(x) != NMAGIC \ && N_MAGIC(x) != ZMAGIC) #else -#define OMAGIC 0407 /* ...object file or impure executable. */ +#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. */ @@ -125,8 +129,7 @@ struct external_exec * 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). - */ + 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. */ @@ -152,12 +155,12 @@ struct external_exec #ifndef N_TXTADDR #define N_TXTADDR(x) \ - (/* The address of a QMAGIC file is always one page in, */ \ - /* with the header in the text. */ \ + (/* 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 */ \ + ? (bfd_vma) 0 /* Object file or NMAGIC. */ \ : (N_SHARED_LIB (x) \ ? (bfd_vma) 0 \ : (N_HEADER_IN_TEXT (x) \ @@ -187,8 +190,8 @@ struct external_exec : (N_SHARED_LIB (x) \ ? 0 \ : (N_HEADER_IN_TEXT (x) \ - ? EXEC_BYTES_SIZE /* no padding */ \ - : ZMAGIC_DISK_BLOCK_SIZE /* a page of padding */))) + ? 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 @@ -203,12 +206,12 @@ struct external_exec : ((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 */ ))) + ? (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. */ + up to a N_SEGSIZE boundary for pure or pageable files. */ #ifndef N_DATADDR #define N_DATADDR(x) \ (N_MAGIC (x) == OMAGIC \ @@ -235,57 +238,59 @@ struct external_exec for NMAGIC. */ #ifndef N_DATOFF -#define N_DATOFF(x) ( N_TXTOFF (x) + N_TXTSIZE (x) ) +#define N_DATOFF(x) (N_TXTOFF (x) + N_TXTSIZE (x)) #endif #ifndef N_TRELOFF -#define N_TRELOFF(x) ( N_DATOFF (x) + (x).a_data ) +#define N_TRELOFF(x) (N_DATOFF (x) + (x).a_data) #endif #ifndef N_DRELOFF -#define N_DRELOFF(x) ( N_TRELOFF (x) + (x).a_trsize ) +#define N_DRELOFF(x) (N_TRELOFF (x) + (x).a_trsize) #endif #ifndef N_SYMOFF -#define N_SYMOFF(x) ( N_DRELOFF (x) + (x).a_drsize ) +#define N_SYMOFF(x) (N_DRELOFF (x) + (x).a_drsize) #endif #ifndef N_STROFF -#define N_STROFF(x) ( N_SYMOFF (x) + (x).a_syms ) +#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 */ +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 */ +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) */ +#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_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_STAB 0xe0 /* If any of these bits are on, it's a debug symbol. */ #define N_INDR 0x0a @@ -301,10 +306,10 @@ struct internal_nlist { 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 */ +#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. */ @@ -335,18 +340,18 @@ struct internal_nlist { 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. -*/ + 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 */ +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) @@ -369,7 +374,7 @@ struct reloc_std_external { #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 */ +#define RELOC_STD_SIZE (BYTES_IN_WORD + 3 + 1) /* Bytes per relocation entry. */ struct reloc_std_internal { @@ -392,21 +397,22 @@ struct reloc_std_internal 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" */ + 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 */ + unsigned int r_pad:1; /* Padding -- set to zero. */ }; -/* EXTENDED RELOCS */ +/* 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 */ +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 @@ -433,20 +439,20 @@ struct reloc_ext_external { #define RELOC_EXT_BITS_TYPE_SH_LITTLE 3 #endif -/* Bytes per relocation entry */ +/* Bytes per relocation entry. */ #define RELOC_EXT_SIZE (BYTES_IN_WORD + 3 + 1 + BYTES_IN_WORD) enum reloc_type { - /* simple relocations */ + /* 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 */ + /* 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 */ + /* 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 */ @@ -455,16 +461,16 @@ enum reloc_type RELOC_LO10, /* data[0:9] = (addend + sv) */ RELOC_SFA_BASE, RELOC_SFA_OFF13, - /* P.I.C. (base-relative) */ + /* 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. (?) */ + /* For some sort of pc-rel P.I.C. (?) */ RELOC_PC10, RELOC_PC22, - /* P.I.C. jump table */ + /* P.I.C. jump table. */ RELOC_JMP_TBL, - /* reputedly for shared libraries somehow */ + /* Reputedly for shared libraries somehow. */ RELOC_SEGOFF16, RELOC_GLOB_DAT, RELOC_JMP_SLOT, @@ -476,13 +482,12 @@ enum reloc_type RELOC_HHI22, /* data[0:21] = (addend + sv) >> 42 */ RELOC_HLO10, /* data[0:9] = (addend + sv) >> 32 */ - /* 29K relocation types */ + /* 29K relocation types. */ RELOC_JUMPTARG, RELOC_CONST, RELOC_CONSTH, - /* All the new ones I can think of, for sparc v9 */ - + /* 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 */ @@ -492,25 +497,23 @@ enum reloc_type 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 ? - */ + 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 */ +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 ? - - */ + What about archive indexes ? */ #endif /* __A_OUT_64_H__ */ |