200 lines
5.6 KiB
C
200 lines
5.6 KiB
C
/* Basic coff information for the PowerPC
|
|
*
|
|
* Based on coff/rs6000.h, coff/i386.h and others.
|
|
*
|
|
* Initial release: Kim Knuttila (krk@cygnus.com)
|
|
*/
|
|
|
|
/********************** FILE HEADER **********************/
|
|
|
|
struct external_filehdr {
|
|
char f_magic[2]; /* magic number */
|
|
char f_nscns[2]; /* number of sections */
|
|
char f_timdat[4]; /* time & date stamp */
|
|
char f_symptr[4]; /* file pointer to symtab */
|
|
char f_nsyms[4]; /* number of symtab entries */
|
|
char f_opthdr[2]; /* sizeof(optional hdr) */
|
|
char f_flags[2]; /* flags */
|
|
};
|
|
|
|
#define FILHDR struct external_filehdr
|
|
#define FILHSZ 20
|
|
|
|
/* 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_AR32WR file has byte ordering of an AR32WR machine (e.g. vax)
|
|
*/
|
|
|
|
#define F_RELFLG (0x0001)
|
|
#define F_EXEC (0x0002)
|
|
#define F_LNNO (0x0004)
|
|
#define F_LSYMS (0x0008)
|
|
|
|
/* extra NT defines */
|
|
#define PPCMAGIC 0760 /* peeked on aa PowerPC Windows NT box */
|
|
#define DOSMAGIC 0x5a4d /* from arm.h, i386.h */
|
|
#define NT_SIGNATURE 0x00004550 /* from arm.h, i386.h */
|
|
|
|
/* from winnt.h */
|
|
#define IMAGE_NT_OPTIONAL_HDR_MAGIC 0x10b
|
|
|
|
#define PPCBADMAG(x) ((x).f_magic != PPCMAGIC)
|
|
|
|
/********************** AOUT "OPTIONAL HEADER" **********************/
|
|
|
|
typedef struct
|
|
{
|
|
char magic[2]; /* type of file */
|
|
char vstamp[2]; /* version stamp */
|
|
char tsize[4]; /* text size in bytes, padded to FW bdry*/
|
|
char dsize[4]; /* initialized data " " */
|
|
char bsize[4]; /* uninitialized data " " */
|
|
char entry[4]; /* entry pt. */
|
|
char text_start[4]; /* base of text used for this file */
|
|
char data_start[4]; /* base of data used for this file */
|
|
}
|
|
AOUTHDR;
|
|
|
|
#define AOUTSZ 28
|
|
#define AOUTHDRSZ 28
|
|
|
|
/********************** SECTION HEADER **********************/
|
|
|
|
struct external_scnhdr {
|
|
char s_name[8]; /* section name */
|
|
char s_paddr[4]; /* physical address, aliased s_nlib */
|
|
char s_vaddr[4]; /* virtual address */
|
|
char s_size[4]; /* section size */
|
|
char s_scnptr[4]; /* file ptr to raw data for section */
|
|
char s_relptr[4]; /* file ptr to relocation */
|
|
char s_lnnoptr[4]; /* file ptr to line numbers */
|
|
char s_nreloc[2]; /* number of relocation entries */
|
|
char s_nlnno[2]; /* number of line number entries */
|
|
char s_flags[4]; /* flags */
|
|
};
|
|
|
|
#define SCNHDR struct external_scnhdr
|
|
#define SCNHSZ 40
|
|
|
|
/*
|
|
* names of "special" sections
|
|
*/
|
|
#define _TEXT ".text"
|
|
#define _DATA ".data"
|
|
#define _BSS ".bss"
|
|
#define _COMMENT ".comment"
|
|
#define _LIB ".lib"
|
|
|
|
/********************** 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 external_lineno {
|
|
union {
|
|
char l_symndx[4]; /* function name symbol index, iff l_lnno == 0 */
|
|
char l_paddr[4]; /* (physical) address of line number */
|
|
} l_addr;
|
|
char l_lnno[2]; /* line number */
|
|
};
|
|
|
|
#define LINENO struct external_lineno
|
|
#define LINESZ 6
|
|
|
|
/********************** SYMBOLS **********************/
|
|
|
|
#define E_SYMNMLEN 8 /* # characters in a symbol name */
|
|
|
|
/* Allow the file name length to be overridden in the including file */
|
|
#ifndef E_FILNMLEN
|
|
#define E_FILNMLEN 14
|
|
#endif
|
|
|
|
#define E_DIMNUM 4 /* # array dimensions in auxiliary entry */
|
|
|
|
struct external_syment
|
|
{
|
|
union {
|
|
char e_name[E_SYMNMLEN];
|
|
struct {
|
|
char e_zeroes[4];
|
|
char e_offset[4];
|
|
} e;
|
|
} e;
|
|
char e_value[4];
|
|
char e_scnum[2];
|
|
char e_type[2];
|
|
char e_sclass[1];
|
|
char e_numaux[1];
|
|
};
|
|
|
|
#define SYMENT struct external_syment
|
|
#define SYMESZ 18
|
|
|
|
#define N_BTMASK (0xf)
|
|
#define N_TMASK (0x30)
|
|
#define N_BTSHFT (4)
|
|
#define N_TSHIFT (2)
|
|
|
|
union external_auxent {
|
|
struct {
|
|
char x_tagndx[4]; /* str, un, or enum tag indx */
|
|
union {
|
|
struct {
|
|
char x_lnno[2]; /* declaration line number */
|
|
char x_size[2]; /* str/union/array size */
|
|
} x_lnsz;
|
|
char x_fsize[4]; /* size of function */
|
|
} x_misc;
|
|
union {
|
|
struct { /* if ISFCN, tag, or .bb */
|
|
char x_lnnoptr[4]; /* ptr to fcn line # */
|
|
char x_endndx[4]; /* entry ndx past block end */
|
|
} x_fcn;
|
|
struct { /* if ISARY, up to 4 dimen. */
|
|
char x_dimen[E_DIMNUM][2];
|
|
} x_ary;
|
|
} x_fcnary;
|
|
char x_tvndx[2]; /* tv index */
|
|
} x_sym;
|
|
|
|
union {
|
|
char x_fname[E_FILNMLEN];
|
|
struct {
|
|
char x_zeroes[4];
|
|
char x_offset[4];
|
|
} x_n;
|
|
} x_file;
|
|
|
|
struct {
|
|
char x_scnlen[4]; /* section length */
|
|
char x_nreloc[2]; /* # relocation entries */
|
|
char x_nlinno[2]; /* # line numbers */
|
|
char x_checksum[4]; /* section COMDAT checksum */
|
|
char x_associated[2]; /* COMDAT associated section index */
|
|
char x_comdat[1]; /* COMDAT selection number */
|
|
} x_scn;
|
|
};
|
|
|
|
#define AUXENT union external_auxent
|
|
#define AUXESZ 18
|
|
|
|
#define _ETEXT "etext"
|
|
|
|
/********************** RELOCATION DIRECTIVES **********************/
|
|
|
|
struct external_reloc {
|
|
char r_vaddr[4];
|
|
char r_symndx[4];
|
|
char r_type[2];
|
|
};
|
|
|
|
#define RELOC struct external_reloc
|
|
#define RELSZ 10
|
|
|