internal.h

这个是LINUX下的GDB调度工具的源码

/* Internal format of COFF object file data structures, for GNU BFD.
   This file is part of BFD, the Binary File Descriptor library.
   
   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 GNU_COFF_INTERNAL_H
#define GNU_COFF_INTERNAL_H 1

/* First, make "signed char" work, even on old compilers. */
#ifndef signed
#ifndef __STDC__
#define	signed			/**/
#endif
#endif

/********************** FILE HEADER **********************/

/* extra stuff in a PE header. */

struct internal_extra_pe_filehdr
{
  /* DOS header data follows for PE stuff */
  unsigned short e_magic;	/* Magic number, 0x5a4d */
  unsigned short e_cblp;	/* Bytes on last page of file, 0x90 */
  unsigned short e_cp;		/* Pages in file, 0x3 */
  unsigned short e_crlc;	/* Relocations, 0x0 */
  unsigned short e_cparhdr;	/* Size of header in paragraphs, 0x4 */
  unsigned short e_minalloc;	/* Minimum extra paragraphs needed, 0x0 */
  unsigned short e_maxalloc;	/* Maximum extra paragraphs needed, 0xFFFF */
  unsigned short e_ss;		/* Initial (relative) SS value, 0x0 */
  unsigned short e_sp;		/* Initial SP value, 0xb8 */
  unsigned short e_csum;	/* Checksum, 0x0 */
  unsigned short e_ip;		/* Initial IP value, 0x0 */
  unsigned short e_cs;		/* Initial (relative) CS value, 0x0 */
  unsigned short e_lfarlc;	/* File address of relocation table, 0x40 */
  unsigned short e_ovno;	/* Overlay number, 0x0 */
  unsigned short e_res[4];	/* Reserved words, all 0x0 */
  unsigned short e_oemid;	/* OEM identifier (for e_oeminfo), 0x0 */
  unsigned short e_oeminfo;	/* OEM information; e_oemid specific, 0x0 */
  unsigned short e_res2[10];	/* Reserved words, all 0x0 */
  bfd_vma  e_lfanew;		/* File address of new exe header, 0x80 */
  unsigned long dos_message[16]; /* text which always follows dos header */
  bfd_vma  nt_signature;   	/* required NT signature, 0x4550 */ 
};

struct internal_filehdr
{
  struct internal_extra_pe_filehdr pe;

  /* Standard coff internal info.  */
  unsigned short f_magic;	/* magic number			*/
  unsigned short f_nscns;	/* number of sections		*/
  long f_timdat;		/* time & date stamp		*/
  bfd_vma f_symptr;		/* file pointer to symtab	*/
  long f_nsyms;			/* number of symtab entries	*/
  unsigned short f_opthdr;	/* sizeof(optional hdr)		*/
  unsigned short f_flags;	/* flags			*/
  unsigned short f_target_id;	/* (TI COFF specific)		*/
};


/* Bits for f_flags:
 	F_RELFLG	relocation info stripped from file
 	F_EXEC		file is executable (no unresolved external references)
 	F_LNNO		line numbers stripped from file
 	F_LSYMS		local symbols stripped from file
 	F_AR16WR	file is 16-bit little-endian
 	F_AR32WR	file is 32-bit little-endian
 	F_AR32W		file is 32-bit big-endian
 	F_DYNLOAD	rs/6000 aix: dynamically loadable w/imports & exports
 	F_SHROBJ	rs/6000 aix: file is a shared object
        F_DLL           PE format DLL.  */

#define	F_RELFLG	(0x0001)
#define	F_EXEC		(0x0002)
#define	F_LNNO		(0x0004)
#define	F_LSYMS		(0x0008)
#define	F_AR16WR	(0x0080)
#define	F_AR32WR	(0x0100)
#define	F_AR32W     	(0x0200)
#define	F_DYNLOAD	(0x1000)
#define	F_SHROBJ	(0x2000)
#define F_DLL           (0x2000)

/* Extra structure which is used in the optional header.  */
typedef struct _IMAGE_DATA_DIRECTORY 
{
  bfd_vma VirtualAddress;
  long    Size;
}  IMAGE_DATA_DIRECTORY;
#define IMAGE_NUMBEROF_DIRECTORY_ENTRIES  16

/* Default image base for NT.  */
#define NT_EXE_IMAGE_BASE 0x400000
#define NT_DLL_IMAGE_BASE 0x10000000

/* Default image base for BeOS. */
#define BEOS_EXE_IMAGE_BASE 0x80000000
#define BEOS_DLL_IMAGE_BASE 0x10000000

/* Extra stuff in a PE aouthdr */

#define PE_DEF_SECTION_ALIGNMENT 0x1000
#ifndef PE_DEF_FILE_ALIGNMENT
# define PE_DEF_FILE_ALIGNMENT 0x200
#endif

struct internal_extra_pe_aouthdr 
{
  /* PE stuff  */
  bfd_vma ImageBase;		/* address of specific location in memory that
				   file is located, NT default 0x10000 */

  bfd_vma SectionAlignment;	/* section alignment default 0x1000 */
  bfd_vma FileAlignment;	/* file alignment default 0x200 */
  short   MajorOperatingSystemVersion; /* minimum version of the operating */
  short   MinorOperatingSystemVersion; /* system req'd for exe, default to 1*/
  short   MajorImageVersion;	/* user defineable field to store version of */
  short   MinorImageVersion;	/* exe or dll being created, default to 0 */ 
  short   MajorSubsystemVersion; /* minimum subsystem version required to */
  short   MinorSubsystemVersion; /* run exe; default to 3.1 */
  long    Reserved1;		/* seems to be 0 */
  long    SizeOfImage;		/* size of memory to allocate for prog */
  long    SizeOfHeaders;	/* size of PE header and section table */
  long    CheckSum;		/* set to 0 */
  short   Subsystem;	

  /* type of subsystem exe uses for user interface,
     possible values:
     1 - NATIVE   Doesn't require a subsystem
     2 - WINDOWS_GUI runs in Windows GUI subsystem
     3 - WINDOWS_CUI runs in Windows char sub. (console app)
     5 - OS2_CUI runs in OS/2 character subsystem
     7 - POSIX_CUI runs in Posix character subsystem */
  short   DllCharacteristics;	/* flags for DLL init, use 0 */
  bfd_vma SizeOfStackReserve;	/* amount of memory to reserve  */
  bfd_vma SizeOfStackCommit;	/* amount of memory initially committed for 
				   initial thread's stack, default is 0x1000 */
  bfd_vma SizeOfHeapReserve;	/* amount of virtual memory to reserve and */
  bfd_vma SizeOfHeapCommit;	/* commit, don't know what to defaut it to */
  long    LoaderFlags;		/* can probably set to 0 */
  long    NumberOfRvaAndSizes;	/* number of entries in next entry, 16 */
  IMAGE_DATA_DIRECTORY DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES];
};

/********************** AOUT "OPTIONAL HEADER" **********************/
struct internal_aouthdr
{
  short magic;			/* type of file				*/
  short vstamp;			/* version stamp			*/
  bfd_vma tsize;		/* text size in bytes, padded to FW bdry*/
  bfd_vma dsize;		/* initialized data "  "		*/
  bfd_vma bsize;		/* uninitialized data "   "		*/
  bfd_vma entry;		/* entry pt.				*/
  bfd_vma text_start;		/* base of text used for this file */
  bfd_vma data_start;		/* base of data used for this file */

  /* i960 stuff */
  unsigned long tagentries;	/* number of tag entries to follow */

  /* RS/6000 stuff */
  bfd_vma o_toc;		/* address of TOC			*/
  short o_snentry;		/* section number for entry point */
  short o_sntext;		/* section number for text	*/
  short o_sndata;		/* section number for data	*/
  short o_sntoc;		/* section number for toc	*/
  short o_snloader;		/* section number for loader section */
  short o_snbss;		/* section number for bss	*/
  short o_algntext;		/* max alignment for text	*/
  short o_algndata;		/* max alignment for data	*/
  short o_modtype;		/* Module type field, 1R,RE,RO	*/
  short o_cputype;		/* Encoded CPU type		*/
  bfd_vma o_maxstack;	/* max stack size allowed.	*/
  bfd_vma o_maxdata;	/* max data size allowed.	*/

  /* ECOFF stuff */
  bfd_vma bss_start;		/* Base of bss section.		*/
  bfd_vma gp_value;		/* GP register value.		*/
  unsigned long gprmask;	/* General registers used.	*/
  unsigned long cprmask[4];	/* Coprocessor registers used.	*/
  unsigned long fprmask;	/* Floating pointer registers used.  */

  /* Apollo stuff */
  long o_inlib;			/* inlib data */
  long o_sri;			/* Static Resource Information */
  long vid[2];			/* Version id */

  struct internal_extra_pe_aouthdr pe;
};

/********************** STORAGE CLASSES **********************/

/* This used to be defined as -1, but now n_sclass is unsigned.  */
#define C_EFCN		0xff	/* physical end of function	*/
#define C_NULL		0
#define C_AUTO		1	/* automatic variable		*/
#define C_EXT		2	/* external symbol		*/
#define C_STAT		3	/* static			*/
#define C_REG		4	/* register variable		*/
#define C_EXTDEF	5	/* external definition		*/
#define C_LABEL		6	/* label			*/
#define C_ULABEL	7	/* undefined label		*/
#define C_MOS		8	/* member of structure		*/
#define C_ARG		9	/* function argument		*/
#define C_STRTAG	10	/* structure tag		*/
#define C_MOU		11	/* member of union		*/
#define C_UNTAG		12	/* union tag			*/
#define C_TPDEF		13	/* type definition		*/
#define C_USTATIC	14	/* undefined static		*/
#define C_ENTAG		15	/* enumeration tag		*/
#define C_MOE		16	/* member of enumeration	*/
#define C_REGPARM	17	/* register parameter		*/
#define C_FIELD		18	/* bit field			*/
#define C_AUTOARG	19	/* auto argument		*/
#define C_LASTENT	20	/* dummy entry (end of block)	*/
#define C_BLOCK		100	/* ".bb" or ".eb"		*/
#define C_FCN		101	/* ".bf" or ".ef"		*/
#define C_EOS		102	/* end of structure		*/
#define C_FILE		103	/* file name			*/
#define C_LINE		104	/* line # reformatted as symbol table entry */
#define C_ALIAS	 	105	/* duplicate tag		*/
#define C_HIDDEN	106	/* ext symbol in dmert public lib */

#if defined _AIX52 || defined AIX_WEAK_SUPPORT
#define C_WEAKEXT	111	/* weak symbol -- AIX standard.  */
#else
#define C_WEAKEXT	127	/* weak symbol -- GNU extension.  */
#endif

/* New storage classes for TI COFF */
#define C_UEXT		19	/* Tentative external definition */
#define C_STATLAB	20	/* Static load time label */
#define C_EXTLAB	21	/* External load time label */
#define C_SYSTEM	23	/* System Wide variable */

/* New storage classes for WINDOWS_NT   */
#define C_SECTION       104     /* section name */
#define C_NT_WEAK	105	/* weak external */

 /* New storage classes for 80960 */

/* C_LEAFPROC is obsolete.  Use C_LEAFEXT or C_LEAFSTAT */
#define C_LEAFPROC	108	/* Leaf procedure, "call" via BAL */

#define C_SCALL		107	/* Procedure reachable via system call */
#define C_LEAFEXT       108	/* External leaf */
#define C_LEAFSTAT      113	/* Static leaf */
#define C_OPTVAR	109	/* Optimized variable		*/
#define C_DEFINE	110	/* Preprocessor #define		*/
#define C_PRAGMA	111	/* Advice to compiler or linker	*/
#define C_SEGMENT	112	/* 80960 segment name		*/

  /* Storage classes for m88k */
#define C_SHADOW        107     /* shadow symbol                */
#define C_VERSION       108     /* coff version symbol          */

 /* New storage classes for RS/6000 */
#define C_HIDEXT        107	/* Un-named external symbol */
#define C_BINCL         108	/* Marks beginning of include file */
#define C_EINCL         109	/* Marks ending of include file */

 /* storage classes for stab symbols for RS/6000 */
#define C_GSYM          (0x80)
#define C_LSYM          (0x81)
#define C_PSYM          (0x82)
#define C_RSYM          (0x83)
#define C_RPSYM         (0x84)
#define C_STSYM         (0x85)
#define C_TCSYM         (0x86)
#define C_BCOMM         (0x87)
#define C_ECOML         (0x88)
#define C_ECOMM         (0x89)
#define C_DECL          (0x8c)
#define C_ENTRY         (0x8d)
#define C_FUN           (0x8e)
#define C_BSTAT         (0x8f)
#define C_ESTAT         (0x90)

/* Storage classes for Thumb symbols */
#define C_THUMBEXT      (128 + C_EXT)		/* 130 */
#define C_THUMBSTAT     (128 + C_STAT)		/* 131 */
#define C_THUMBLABEL    (128 + C_LABEL)		/* 134 */
#define C_THUMBEXTFUNC  (C_THUMBEXT  + 20)	/* 150 */
#define C_THUMBSTATFUNC (C_THUMBSTAT + 20)	/* 151 */

/********************** SECTION HEADER **********************/

#define SCNNMLEN (8)

struct internal_scnhdr
{
  char s_name[SCNNMLEN];	/* section name			*/

  /* Physical address, aliased s_nlib.
     In the pei format, this field is the virtual section size
     (the size of the section after being loaded int memory),
     NOT the physical address.  */
  bfd_vma s_paddr;

  bfd_vma s_vaddr;		/* virtual address		*/
  bfd_vma s_size;		/* section size			*/
  bfd_vma s_scnptr;		/* file ptr to raw data for section */
  bfd_vma s_relptr;		/* file ptr to relocation	*/
  bfd_vma s_lnnoptr;		/* file ptr to line numbers	*/
  unsigned long s_nreloc;	/* number of relocation entries	*/
  unsigned long s_nlnno;	/* number of line number entries*/
  long s_flags;			/* flags			*/
  long s_align;			/* used on I960			*/
  unsigned char s_page;         /* TI COFF load page            */
};

/* s_flags "type".  */
#define STYP_REG	 (0x0000)	/* "regular": allocated, relocated, loaded */
#define STYP_DSECT	 (0x0001)	/* "dummy":  relocated only*/
#define STYP_NOLOAD	 (0x0002)	/* "noload": allocated, relocated, not loaded */
#define STYP_GROUP	 (0x0004)	/* "grouped": formed of input sections */
#define STYP_PAD	 (0x0008)	/* "padding": not allocated, not relocated, loaded */
#define STYP_COPY	 (0x0010)	/* "copy": for decision function used by field update;  not allocated, not relocated,
									     loaded; reloc & lineno entries processed normally */
#define STYP_TEXT	 (0x0020)	/* section contains text only */
#define S_SHRSEG	 (0x0020)	/* In 3b Update files (output of ogen), sections which appear in SHARED segments of the Pfile
									     will have the S_SHRSEG flag set by ogen, to inform dufr that updating 1 copy of the proc. will
									     update all process invocations. */
#define STYP_DATA	 (0x0040)	/* section contains data only */
#define STYP_BSS	 (0x0080)	/* section contains bss only */
#define S_NEWFCN	 (0x0100)	/* In a minimal file or an update file, a new function (as compared with a replaced function) */
#define STYP_INFO	 (0x0200)	/* comment: not allocated not relocated, not loaded */
#define STYP_OVER	 (0x0400)	/* overlay: relocated not allocated or loaded */
#define STYP_LIB	 (0x0800)	/* for .lib: same as INFO */
#define STYP_MERGE	 (0x2000)	/* merge section -- combines with text, data or bss sections only */
#define STYP_REVERSE_PAD (0x4000)	/* section will be padded with no-op instructions
					   wherever padding is necessary and there is a
					   word of contiguous bytes beginning on a word
					   boundary. */

#define STYP_LIT	0x8020	/* Literal data (like STYP_TEXT) */


/********************** LINE NUMBERS **********************/

/* 1 line number entry for every "breakpointable" source line in a section.
   Line numbers are grouped on a per function basis; first entry in a function
   grouping will have l_lnno = 0 and in place of physical address will be the
   symbol table index of the function name.  */

struct internal_lineno
{
  union
  {
    bfd_signed_vma l_symndx;		/* function name symbol index, iff l_lnno == 0*/
    bfd_signed_vma l_paddr;		/* (physical) address of line number	*/
  }     l_addr;
  unsigned long l_lnno;		/* line number		*/
};

/********************** SYMBOLS **********************/

#define SYMNMLEN	8	/* # characters in a symbol name	*/
#define FILNMLEN	14	/* # characters in a file name		*/
#define DIMNUM		4	/* # array dimensions in auxiliary entry */