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      1 /* ECOFF support on Alpha machines.
      2    coff/ecoff.h must be included before this file.
      3 
      4    Copyright (C) 2001-2014 Free Software Foundation, Inc.
      5 
      6    This program is free software; you can redistribute it and/or modify
      7    it under the terms of the GNU General Public License as published by
      8    the Free Software Foundation; either version 3 of the License, or
      9    (at your option) any later version.
     10 
     11    This program is distributed in the hope that it will be useful,
     12    but WITHOUT ANY WARRANTY; without even the implied warranty of
     13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     14    GNU General Public License for more details.
     15 
     16    You should have received a copy of the GNU General Public License
     17    along with this program; if not, write to the Free Software
     18    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
     19    MA 02110-1301, USA.  */
     20 
     21 /********************** FILE HEADER **********************/
     22 
     23 struct external_filehdr
     24 {
     25   unsigned char f_magic[2];	/* magic number			*/
     26   unsigned char f_nscns[2];	/* number of sections		*/
     27   unsigned char f_timdat[4];	/* time & date stamp		*/
     28   unsigned char f_symptr[8];	/* file pointer to symtab	*/
     29   unsigned char f_nsyms[4];	/* number of symtab entries	*/
     30   unsigned char f_opthdr[2];	/* sizeof(optional hdr)		*/
     31   unsigned char f_flags[2];	/* flags			*/
     32 };
     33 
     34 /* Magic numbers are defined in coff/ecoff.h.  */
     35 #define ALPHA_ECOFF_BADMAG(x) \
     36   ((x).f_magic != ALPHA_MAGIC && (x).f_magic != ALPHA_MAGIC_BSD)
     37 
     38 #define ALPHA_ECOFF_COMPRESSEDMAG(x) \
     39   ((x).f_magic == ALPHA_MAGIC_COMPRESSED)
     40 
     41 /* The object type is encoded in the f_flags.  */
     42 #define F_ALPHA_OBJECT_TYPE_MASK	0x3000
     43 #define F_ALPHA_NO_SHARED		0x1000
     44 #define F_ALPHA_SHARABLE		0x2000
     45 #define F_ALPHA_CALL_SHARED		0x3000
     46 
     47 #define	FILHDR	struct external_filehdr
     48 #define	FILHSZ	24
     49 
     50 /********************** AOUT "OPTIONAL HEADER" **********************/
     51 
     52 typedef struct external_aouthdr
     53 {
     54   unsigned char magic[2];	/* type of file				*/
     55   unsigned char	vstamp[2];	/* version stamp			*/
     56   unsigned char bldrev[2];	/* ?? */
     57   unsigned char padding[2];	/* pad to quadword boundary		*/
     58   unsigned char	tsize[8];	/* text size in bytes			*/
     59   unsigned char	dsize[8];	/* initialized data "  "		*/
     60   unsigned char	bsize[8];	/* uninitialized data "   "		*/
     61   unsigned char	entry[8];	/* entry pt.				*/
     62   unsigned char text_start[8];	/* base of text used for this file */
     63   unsigned char data_start[8];	/* base of data used for this file */
     64   unsigned char bss_start[8];	/* base of bss used for this file */
     65   unsigned char gprmask[4];	/* bitmask of general registers used */
     66   unsigned char fprmask[4];	/* bitmask of floating point registers used */
     67   unsigned char gp_value[8];	/* value for gp register */
     68 } AOUTHDR;
     69 
     70 /* compute size of a header */
     71 
     72 #define AOUTSZ 80
     73 #define AOUTHDRSZ 80
     74 
     75 /********************** SECTION HEADER **********************/
     76 
     77 struct external_scnhdr
     78 {
     79   unsigned char	s_name[8];	/* section name			*/
     80   unsigned char	s_paddr[8];	/* physical address, aliased s_nlib */
     81   unsigned char	s_vaddr[8];	/* virtual address		*/
     82   unsigned char	s_size[8];	/* section size			*/
     83   unsigned char	s_scnptr[8];	/* file ptr to raw data for section */
     84   unsigned char	s_relptr[8];	/* file ptr to relocation	*/
     85   unsigned char	s_lnnoptr[8];	/* file ptr to line numbers	*/
     86   unsigned char	s_nreloc[2];	/* number of relocation entries	*/
     87   unsigned char	s_nlnno[2];	/* number of line number entries*/
     88   unsigned char	s_flags[4];	/* flags			*/
     89 };
     90 
     91 #define	SCNHDR	struct external_scnhdr
     92 #define	SCNHSZ	64
     93 
     94 /********************** RELOCATION DIRECTIVES **********************/
     95 
     96 struct external_reloc
     97 {
     98   unsigned char r_vaddr[8];
     99   unsigned char r_symndx[4];
    100   unsigned char r_bits[4];
    101 };
    102 
    103 #define RELOC struct external_reloc
    104 #define RELSZ 16
    105 
    106 /* Constants to unpack the r_bits field.  The Alpha seems to always be
    107    little endian, so I haven't bothered to define big endian variants
    108    of these.  */
    109 
    110 #define RELOC_BITS0_TYPE_LITTLE			0xff
    111 #define RELOC_BITS0_TYPE_SH_LITTLE		0
    112 
    113 #define RELOC_BITS1_EXTERN_LITTLE		0x01
    114 
    115 #define RELOC_BITS1_OFFSET_LITTLE		0x7e
    116 #define RELOC_BITS1_OFFSET_SH_LITTLE		1
    117 
    118 #define RELOC_BITS1_RESERVED_LITTLE		0x80
    119 #define RELOC_BITS1_RESERVED_SH_LITTLE		7
    120 #define RELOC_BITS2_RESERVED_LITTLE		0xff
    121 #define RELOC_BITS2_RESERVED_SH_LEFT_LITTLE	1
    122 #define RELOC_BITS3_RESERVED_LITTLE		0x03
    123 #define RELOC_BITS3_RESERVED_SH_LEFT_LITTLE	9
    124 
    125 #define RELOC_BITS3_SIZE_LITTLE			0xfc
    126 #define RELOC_BITS3_SIZE_SH_LITTLE		2
    127 
    128 /* The r_type field in a reloc is one of the following values.  */
    129 #define ALPHA_R_IGNORE		0
    130 #define ALPHA_R_REFLONG		1
    131 #define ALPHA_R_REFQUAD		2
    132 #define ALPHA_R_GPREL32		3
    133 #define ALPHA_R_LITERAL		4
    134 #define ALPHA_R_LITUSE		5
    135 #define ALPHA_R_GPDISP		6
    136 #define ALPHA_R_BRADDR		7
    137 #define ALPHA_R_HINT		8
    138 #define ALPHA_R_SREL16		9
    139 #define ALPHA_R_SREL32	       10
    140 #define ALPHA_R_SREL64	       11
    141 #define ALPHA_R_OP_PUSH	       12
    142 #define ALPHA_R_OP_STORE       13
    143 #define ALPHA_R_OP_PSUB	       14
    144 #define ALPHA_R_OP_PRSHIFT     15
    145 #define ALPHA_R_GPVALUE	       16
    146 #define ALPHA_R_GPRELHIGH      17
    147 #define ALPHA_R_GPRELLOW       18
    148 #define ALPHA_R_IMMED          19
    149 
    150 /* Overloaded reloc value used by Net- and OpenBSD.  */
    151 #define ALPHA_R_LITERALSLEAZY  17
    152 
    153 /* With ALPHA_R_LITUSE, the r_size field is one of the following values.  */
    154 #define ALPHA_R_LU_BASE         1
    155 #define ALPHA_R_LU_BYTOFF       2
    156 #define ALPHA_R_LU_JSR          3
    157 
    158 /* With ALPHA_R_IMMED, the r_size field is one of the following values.  */
    159 #define ALPHA_R_IMMED_GP_16     1
    160 #define ALPHA_R_IMMED_GP_HI32   2
    161 #define ALPHA_R_IMMED_SCN_HI32  3
    162 #define ALPHA_R_IMMED_BR_HI32   4
    163 #define ALPHA_R_IMMED_LO32      5
    164 
    165 /********************** SYMBOLIC INFORMATION **********************/
    166 
    167 /* Written by John Gilmore.  */
    168 
    169 /* ECOFF uses COFF-like section structures, but its own symbol format.
    170    This file defines the symbol format in fields whose size and alignment
    171    will not vary on different host systems.  */
    172 
    173 /* File header as a set of bytes */
    174 
    175 struct hdr_ext
    176 {
    177 	unsigned char 	h_magic[2];
    178 	unsigned char	h_vstamp[2];
    179 	unsigned char	h_ilineMax[4];
    180 	unsigned char	h_idnMax[4];
    181 	unsigned char	h_ipdMax[4];
    182 	unsigned char	h_isymMax[4];
    183 	unsigned char	h_ioptMax[4];
    184 	unsigned char	h_iauxMax[4];
    185 	unsigned char	h_issMax[4];
    186 	unsigned char	h_issExtMax[4];
    187 	unsigned char	h_ifdMax[4];
    188 	unsigned char	h_crfd[4];
    189 	unsigned char	h_iextMax[4];
    190 	unsigned char	h_cbLine[8];
    191 	unsigned char	h_cbLineOffset[8];
    192 	unsigned char	h_cbDnOffset[8];
    193 	unsigned char	h_cbPdOffset[8];
    194 	unsigned char	h_cbSymOffset[8];
    195 	unsigned char	h_cbOptOffset[8];
    196 	unsigned char	h_cbAuxOffset[8];
    197 	unsigned char	h_cbSsOffset[8];
    198 	unsigned char	h_cbSsExtOffset[8];
    199 	unsigned char	h_cbFdOffset[8];
    200 	unsigned char	h_cbRfdOffset[8];
    201 	unsigned char	h_cbExtOffset[8];
    202 };
    203 
    204 /* File descriptor external record */
    205 
    206 struct fdr_ext
    207 {
    208 	unsigned char	f_adr[8];
    209 	unsigned char	f_cbLineOffset[8];
    210 	unsigned char	f_cbLine[8];
    211 	unsigned char	f_cbSs[8];
    212 	unsigned char	f_rss[4];
    213 	unsigned char	f_issBase[4];
    214 	unsigned char	f_isymBase[4];
    215 	unsigned char	f_csym[4];
    216 	unsigned char	f_ilineBase[4];
    217 	unsigned char	f_cline[4];
    218 	unsigned char	f_ioptBase[4];
    219 	unsigned char	f_copt[4];
    220 	unsigned char	f_ipdFirst[4];
    221 	unsigned char	f_cpd[4];
    222 	unsigned char	f_iauxBase[4];
    223 	unsigned char	f_caux[4];
    224 	unsigned char	f_rfdBase[4];
    225 	unsigned char	f_crfd[4];
    226 	unsigned char	f_bits1[1];
    227 	unsigned char	f_bits2[3];
    228 	unsigned char	f_padding[4];
    229 };
    230 
    231 #define	FDR_BITS1_LANG_BIG		0xF8
    232 #define	FDR_BITS1_LANG_SH_BIG		3
    233 #define	FDR_BITS1_LANG_LITTLE		0x1F
    234 #define	FDR_BITS1_LANG_SH_LITTLE	0
    235 
    236 #define	FDR_BITS1_FMERGE_BIG		0x04
    237 #define	FDR_BITS1_FMERGE_LITTLE		0x20
    238 
    239 #define	FDR_BITS1_FREADIN_BIG		0x02
    240 #define	FDR_BITS1_FREADIN_LITTLE	0x40
    241 
    242 #define	FDR_BITS1_FBIGENDIAN_BIG	0x01
    243 #define	FDR_BITS1_FBIGENDIAN_LITTLE	0x80
    244 
    245 #define	FDR_BITS2_GLEVEL_BIG		0xC0
    246 #define	FDR_BITS2_GLEVEL_SH_BIG		6
    247 #define	FDR_BITS2_GLEVEL_LITTLE		0x03
    248 #define	FDR_BITS2_GLEVEL_SH_LITTLE	0
    249 
    250 /* We ignore the `reserved' field in bits2. */
    251 
    252 /* Procedure descriptor external record */
    253 
    254 struct pdr_ext {
    255 	unsigned char	p_adr[8];
    256 	unsigned char	p_cbLineOffset[8];
    257 	unsigned char	p_isym[4];
    258 	unsigned char	p_iline[4];
    259 	unsigned char	p_regmask[4];
    260 	unsigned char	p_regoffset[4];
    261 	unsigned char	p_iopt[4];
    262 	unsigned char	p_fregmask[4];
    263 	unsigned char	p_fregoffset[4];
    264 	unsigned char	p_frameoffset[4];
    265 	unsigned char	p_lnLow[4];
    266 	unsigned char	p_lnHigh[4];
    267 	unsigned char	p_gp_prologue[1];
    268 	unsigned char	p_bits1[1];
    269 	unsigned char	p_bits2[1];
    270 	unsigned char	p_localoff[1];
    271 	unsigned char	p_framereg[2];
    272 	unsigned char	p_pcreg[2];
    273 };
    274 
    275 #define PDR_BITS1_GP_USED_BIG		0x80
    276 #define PDR_BITS1_REG_FRAME_BIG		0x40
    277 #define PDR_BITS1_PROF_BIG		0x20
    278 #define PDR_BITS1_RESERVED_BIG		0x1f
    279 #define PDR_BITS1_RESERVED_SH_LEFT_BIG	8
    280 #define PDR_BITS2_RESERVED_BIG		0xff
    281 #define PDR_BITS2_RESERVED_SH_BIG	0
    282 
    283 #define PDR_BITS1_GP_USED_LITTLE	0x01
    284 #define PDR_BITS1_REG_FRAME_LITTLE	0x02
    285 #define PDR_BITS1_PROF_LITTLE		0x04
    286 #define PDR_BITS1_RESERVED_LITTLE	0xf8
    287 #define PDR_BITS1_RESERVED_SH_LITTLE	3
    288 #define PDR_BITS2_RESERVED_LITTLE	0xff
    289 #define PDR_BITS2_RESERVED_SH_LEFT_LITTLE 5
    290 
    291 /* Line numbers */
    292 
    293 struct line_ext {
    294 	unsigned char	l_line[4];
    295 };
    296 
    297 /* Symbol external record */
    298 
    299 struct sym_ext {
    300 	unsigned char	s_value[8];
    301 	unsigned char	s_iss[4];
    302 	unsigned char	s_bits1[1];
    303 	unsigned char	s_bits2[1];
    304 	unsigned char	s_bits3[1];
    305 	unsigned char	s_bits4[1];
    306 };
    307 
    308 #define	SYM_BITS1_ST_BIG		0xFC
    309 #define	SYM_BITS1_ST_SH_BIG		2
    310 #define	SYM_BITS1_ST_LITTLE		0x3F
    311 #define	SYM_BITS1_ST_SH_LITTLE		0
    312 
    313 #define	SYM_BITS1_SC_BIG		0x03
    314 #define	SYM_BITS1_SC_SH_LEFT_BIG	3
    315 #define	SYM_BITS1_SC_LITTLE		0xC0
    316 #define	SYM_BITS1_SC_SH_LITTLE		6
    317 
    318 #define	SYM_BITS2_SC_BIG		0xE0
    319 #define	SYM_BITS2_SC_SH_BIG		5
    320 #define	SYM_BITS2_SC_LITTLE		0x07
    321 #define	SYM_BITS2_SC_SH_LEFT_LITTLE	2
    322 
    323 #define	SYM_BITS2_RESERVED_BIG		0x10
    324 #define	SYM_BITS2_RESERVED_LITTLE	0x08
    325 
    326 #define	SYM_BITS2_INDEX_BIG		0x0F
    327 #define	SYM_BITS2_INDEX_SH_LEFT_BIG	16
    328 #define	SYM_BITS2_INDEX_LITTLE		0xF0
    329 #define	SYM_BITS2_INDEX_SH_LITTLE	4
    330 
    331 #define	SYM_BITS3_INDEX_SH_LEFT_BIG	8
    332 #define	SYM_BITS3_INDEX_SH_LEFT_LITTLE	4
    333 
    334 #define	SYM_BITS4_INDEX_SH_LEFT_BIG	0
    335 #define	SYM_BITS4_INDEX_SH_LEFT_LITTLE	12
    336 
    337 /* External symbol external record */
    338 
    339 struct ext_ext {
    340 	struct	sym_ext es_asym;
    341 	unsigned char	es_bits1[1];
    342 	unsigned char	es_bits2[3];
    343 	unsigned char	es_ifd[4];
    344 };
    345 
    346 #define	EXT_BITS1_JMPTBL_BIG		0x80
    347 #define	EXT_BITS1_JMPTBL_LITTLE		0x01
    348 
    349 #define	EXT_BITS1_COBOL_MAIN_BIG	0x40
    350 #define	EXT_BITS1_COBOL_MAIN_LITTLE	0x02
    351 
    352 #define	EXT_BITS1_WEAKEXT_BIG		0x20
    353 #define	EXT_BITS1_WEAKEXT_LITTLE	0x04
    354 
    355 /* Dense numbers external record */
    356 
    357 struct dnr_ext {
    358 	unsigned char	d_rfd[4];
    359 	unsigned char	d_index[4];
    360 };
    361 
    362 /* Relative file descriptor */
    363 
    364 struct rfd_ext {
    365   unsigned char	rfd[4];
    366 };
    367 
    368 /* Optimizer symbol external record */
    369 
    370 struct opt_ext {
    371   unsigned char o_bits1[1];
    372   unsigned char o_bits2[1];
    373   unsigned char o_bits3[1];
    374   unsigned char o_bits4[1];
    375   struct rndx_ext o_rndx;
    376   unsigned char o_offset[4];
    377 };
    378 
    379 #define OPT_BITS2_VALUE_SH_LEFT_BIG	16
    380 #define OPT_BITS2_VALUE_SH_LEFT_LITTLE	0
    381 
    382 #define OPT_BITS3_VALUE_SH_LEFT_BIG	8
    383 #define OPT_BITS3_VALUE_SH_LEFT_LITTLE	8
    384 
    385 #define OPT_BITS4_VALUE_SH_LEFT_BIG	0
    386 #define OPT_BITS4_VALUE_SH_LEFT_LITTLE	16
    387