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/* IBM RS/6000 "XCOFF64" file definitions for BFD.
Copyright (C) 2000 Free Software Foundation, Inc. */
/********************** 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[8];/* file pointer to symtab */
char f_opthdr[2]; /* sizeof(optional hdr) */
char f_flags[2]; /* flags */
char f_nsyms[4]; /* number of symtab entries */
};
/* IBM RS/6000 */
#define U803XTOCMAGIC 0757 /* readonly text segments and TOC, XCOFF64 */
#define BADMAG(x) ((x).f_magic != U803XTOCMAGIC)
#define FILHDR struct external_filehdr
#define FILHSZ 24
/********************** AOUT "OPTIONAL HEADER" **********************/
typedef struct
{
unsigned char magic[2]; /* type of file */
unsigned char vstamp[2]; /* version stamp */
unsigned char o_debugger[4]; /* reserved */
unsigned char text_start[8]; /* base of text used for this file */
unsigned char data_start[8]; /* base of data used for this file */
unsigned char o_toc[8]; /* address of TOC */
unsigned char o_snentry[2]; /* section number of entry point */
unsigned char o_sntext[2]; /* section number of .text section */
unsigned char o_sndata[2]; /* section number of .data section */
unsigned char o_sntoc[2]; /* section number of TOC */
unsigned char o_snloader[2]; /* section number of .loader section */
unsigned char o_snbss[2]; /* section number of .bss section */
unsigned char o_algntext[2]; /* .text alignment */
unsigned char o_algndata[2]; /* .data alignment */
unsigned char o_modtype[2]; /* module type (??) */
unsigned char o_cputype[2]; /* cpu type */
unsigned char o_resv2[4]; /* reserved */
unsigned char tsize[8]; /* text size bytes, padded to FW bdry */
unsigned char dsize[8]; /* initialized data " " */
unsigned char bsize[8]; /* uninitialized data " " */
unsigned char entry[8]; /* entry pt. */
unsigned char o_maxstack[8]; /* max stack size (??) */
unsigned char o_maxdata[8]; /* max data size (??) */
unsigned char o_resv3[16]; /* reserved */
}
AOUTHDR;
#define AOUTSZ 120
#define SMALL_AOUTSZ (0)
#define AOUTHDRSZ 72
#define RS6K_AOUTHDR_OMAGIC 0x0107 /* old: text & data writeable */
#define RS6K_AOUTHDR_NMAGIC 0x0108 /* new: text r/o, data r/w */
#define RS6K_AOUTHDR_ZMAGIC 0x010B /* paged: text r/o, both page-aligned */
/********************** SECTION HEADER **********************/
struct external_scnhdr {
char s_name[8]; /* section name */
char s_paddr[8]; /* physical address, aliased s_nlib */
char s_vaddr[8]; /* virtual address */
char s_size[8]; /* section size */
char s_scnptr[8]; /* file ptr to raw data for section */
char s_relptr[8]; /* file ptr to relocation */
char s_lnnoptr[8]; /* file ptr to line numbers */
char s_nreloc[4]; /* number of relocation entries */
char s_nlnno[4]; /* number of line number entries*/
char s_flags[4]; /* flags */
char s_pad[4]; /* padding */
};
/*
* names of "special" sections
*/
#define _TEXT ".text"
#define _DATA ".data"
#define _BSS ".bss"
#define _PAD ".pad"
#define _LOADER ".loader"
#define SCNHDR struct external_scnhdr
#define SCNHSZ 72
/* XCOFF uses a special .loader section with type STYP_LOADER. */
#define STYP_LOADER 0x1000
/* XCOFF uses a special .debug section with type STYP_DEBUG. */
#define STYP_DEBUG 0x2000
/* XCOFF handles line number or relocation overflow by creating
another section header with STYP_OVRFLO set. */
#define STYP_OVRFLO 0x8000
/********************** 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[8];/* function name symbol index, iff l_lnno == 0*/
char l_paddr[8]; /* (physical) address of line number */
} l_addr;
char l_lnno[4]; /* line number */
};
#define LINENO struct external_lineno
#define LINESZ 12
/********************** SYMBOLS **********************/
#define E_SYMNMLEN 8 /* # characters in a symbol name */
#define E_FILNMLEN 14 /* # characters in a file name */
#define E_DIMNUM 4 /* # array dimensions in auxiliary entry */
struct external_syment
{
union {
char e_value[8];
} e;
char e_offset[4];
char e_scnum[2];
char e_type[2];
char e_sclass[1];
char e_numaux[1];
};
#define N_BTMASK (017)
#define N_TMASK (060)
#define N_BTSHFT (4)
#define N_TSHIFT (2)
union external_auxent {
struct {
union {
struct {
char x_lnno[4]; /* declaration line number */
char x_size[2]; /* str/union/array size */
} x_lnsz;
struct {
char x_lnnoptr[8];/* ptr to fcn line */
char x_fsize[4]; /* size of function */
char x_endndx[4]; /* entry ndx past block end */
} x_fcn;
} x_fcnary;
} x_sym;
union {
char x_fname[E_FILNMLEN];
struct {
char x_zeroes[4];
char x_offset[4];
char x_pad[6];
unsigned char x_ftype[1];
unsigned char x_resv[2];
} x_n;
} x_file;
struct {
char x_exptr[8];
char x_fsize[4];
char x_endndx[4];
char x_pad[1];
} x_except;
struct {
unsigned char x_scnlen_lo[4];
unsigned char x_parmhash[4];
unsigned char x_snhash[2];
unsigned char x_smtyp[1];
unsigned char x_smclas[1];
unsigned char x_scnlen_hi[4];
unsigned char x_pad[1];
} x_csect;
struct {
char x_pad[17];
char x_auxtype[1];
} x_auxtype;
};
#define SYMENT struct external_syment
#define SYMESZ 18
#define AUXENT union external_auxent
#define AUXESZ 18
#define DBXMASK 0x80 /* for dbx storage mask */
#define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
/* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h */
#define _AUX_EXCEPT 255
#define _AUX_FCN 254
#define _AUX_SYM 253
#define _AUX_FILE 252
#define _AUX_CSECT 251
/********************** RELOCATION DIRECTIVES **********************/
struct external_reloc {
char r_vaddr[8];
char r_symndx[4];
char r_size[1];
char r_type[1];
};
#define RELOC struct external_reloc
#define RELSZ 14
#define DEFAULT_DATA_SECTION_ALIGNMENT 4
#define DEFAULT_BSS_SECTION_ALIGNMENT 4
#define DEFAULT_TEXT_SECTION_ALIGNMENT 4
/* For new sections we havn't heard of before */
#define DEFAULT_SECTION_ALIGNMENT 4
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