You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
243 lines
7.0 KiB
243 lines
7.0 KiB
/* IBM RS/6000 "XCOFF" file definitions for BFD.
|
|
Copyright (C) 1990, 1991 Free Software Foundation, Inc.
|
|
FIXME: Can someone provide a transliteration of this name into ASCII?
|
|
Using the following chars caused a compiler warning on HIUX (so I replaced
|
|
them with octal escapes), and isn't useful without an understanding of what
|
|
character set it is.
|
|
Written by Mimi Ph\373\364ng-Th\345o V\365 of IBM
|
|
and John Gilmore of Cygnus Support. */
|
|
|
|
/********************** 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 */
|
|
};
|
|
|
|
/* IBM RS/6000 */
|
|
#define U802WRMAGIC 0730 /* writeable text segments **chh** */
|
|
#define U802ROMAGIC 0735 /* readonly sharable text segments */
|
|
#define U802TOCMAGIC 0737 /* readonly text segments and TOC */
|
|
|
|
#define BADMAG(x) \
|
|
((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \
|
|
(x).f_magic != U802TOCMAGIC)
|
|
|
|
#define FILHDR struct external_filehdr
|
|
#define FILHSZ 20
|
|
|
|
|
|
/********************** AOUT "OPTIONAL HEADER" **********************/
|
|
|
|
|
|
typedef struct
|
|
{
|
|
unsigned char magic[2]; /* type of file */
|
|
unsigned char vstamp[2]; /* version stamp */
|
|
unsigned char tsize[4]; /* text size in bytes, padded to FW bdry */
|
|
unsigned char dsize[4]; /* initialized data " " */
|
|
unsigned char bsize[4]; /* uninitialized data " " */
|
|
unsigned char entry[4]; /* entry pt. */
|
|
unsigned char text_start[4]; /* base of text used for this file */
|
|
unsigned char data_start[4]; /* base of data used for this file */
|
|
unsigned char o_toc[4]; /* 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_maxstack[4]; /* max stack size (??) */
|
|
unsigned char o_maxdata[4]; /* max data size (??) */
|
|
unsigned char o_resv2[12]; /* reserved */
|
|
}
|
|
AOUTHDR;
|
|
|
|
#define AOUTSZ 72
|
|
#define SMALL_AOUTSZ (28)
|
|
#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[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 */
|
|
};
|
|
|
|
/*
|
|
* 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 40
|
|
|
|
/* 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[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 */
|
|
#define E_FILNMLEN 14 /* # characters in a file name */
|
|
#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 N_BTMASK (017)
|
|
#define N_TMASK (060)
|
|
#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 */
|
|
} x_scn;
|
|
|
|
struct {
|
|
char x_tvfill[4]; /* tv fill value */
|
|
char x_tvlen[2]; /* length of .tv */
|
|
char x_tvran[2][2]; /* tv range */
|
|
} x_tv; /* info about .tv section (in auxent of symbol .tv)) */
|
|
|
|
struct {
|
|
unsigned char x_scnlen[4];
|
|
unsigned char x_parmhash[4];
|
|
unsigned char x_snhash[2];
|
|
unsigned char x_smtyp[1];
|
|
unsigned char x_smclas[1];
|
|
unsigned char x_stab[4];
|
|
unsigned char x_snstab[2];
|
|
} x_csect;
|
|
|
|
};
|
|
|
|
#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)
|
|
|
|
|
|
|
|
/********************** RELOCATION DIRECTIVES **********************/
|
|
|
|
|
|
struct external_reloc {
|
|
char r_vaddr[4];
|
|
char r_symndx[4];
|
|
char r_size[1];
|
|
char r_type[1];
|
|
};
|
|
|
|
|
|
#define RELOC struct external_reloc
|
|
#define RELSZ 10
|
|
|
|
#define DEFAULT_DATA_SECTION_ALIGNMENT 4
|
|
#define DEFAULT_BSS_SECTION_ALIGNMENT 4
|
|
#define DEFAULT_TEXT_SECTION_ALIGNMENT 4
|
|
/* For new sections we haven't heard of before */
|
|
#define DEFAULT_SECTION_ALIGNMENT 4
|
|
|