sh.h revision 38889 
1/*** coff information for Hitachi SH */
2
3/********************** FILE HEADER **********************/
4
5struct external_filehdr {
6	char f_magic[2];	/* magic number			*/
7	char f_nscns[2];	/* number of sections		*/
8	char f_timdat[4];	/* time & date stamp		*/
9	char f_symptr[4];	/* file pointer to symtab	*/
10	char f_nsyms[4];	/* number of symtab entries	*/
11	char f_opthdr[2];	/* sizeof(optional hdr)		*/
12	char f_flags[2];	/* flags			*/
13};
14
15
16
17#define	SH_ARCH_MAGIC_BIG	0x0500
18#define	SH_ARCH_MAGIC_LITTLE	0x0550  /* Little endian SH */
19
20
21#define SHBADMAG(x) \
22 (((x).f_magic!=SH_ARCH_MAGIC_BIG) && \
23  ((x).f_magic!=SH_ARCH_MAGIC_LITTLE))
24
25#define	FILHDR	struct external_filehdr
26#define	FILHSZ	20
27
28
29/********************** AOUT "OPTIONAL HEADER" **********************/
30
31
32typedef struct
33{
34  char 	magic[2];		/* type of file				*/
35  char	vstamp[2];		/* version stamp			*/
36  char	tsize[4];		/* text size in bytes, padded to FW bdry*/
37  char	dsize[4];		/* initialized data "  "		*/
38  char	bsize[4];		/* uninitialized data "   "		*/
39  char	entry[4];		/* entry pt.				*/
40  char 	text_start[4];		/* base of text used for this file */
41  char 	data_start[4];		/* base of data used for this file */
42}
43AOUTHDR;
44
45
46#define AOUTHDRSZ 28
47#define AOUTSZ 28
48
49
50
51
52/********************** SECTION HEADER **********************/
53
54
55struct external_scnhdr {
56	char		s_name[8];	/* section name			*/
57	char		s_paddr[4];	/* physical address, aliased s_nlib */
58	char		s_vaddr[4];	/* virtual address		*/
59	char		s_size[4];	/* section size			*/
60	char		s_scnptr[4];	/* file ptr to raw data for section */
61	char		s_relptr[4];	/* file ptr to relocation	*/
62	char		s_lnnoptr[4];	/* file ptr to line numbers	*/
63	char		s_nreloc[2];	/* number of relocation entries	*/
64	char		s_nlnno[2];	/* number of line number entries*/
65	char		s_flags[4];	/* flags			*/
66};
67
68/*
69 * names of "special" sections
70 */
71#define _TEXT	".text"
72#define _DATA	".data"
73#define _BSS	".bss"
74
75
76#define	SCNHDR	struct external_scnhdr
77#define	SCNHSZ	40
78
79
80/********************** LINE NUMBERS **********************/
81
82/* 1 line number entry for every "breakpointable" source line in a section.
83 * Line numbers are grouped on a per function basis; first entry in a function
84 * grouping will have l_lnno = 0 and in place of physical address will be the
85 * symbol table index of the function name.
86 */
87struct external_lineno {
88	union {
89		char l_symndx[4];	/* function name symbol index, iff l_lnno == 0*/
90		char l_paddr[4];	/* (physical) address of line number	*/
91	} l_addr;
92	char l_lnno[4];	/* line number		*/
93};
94
95#define GET_LINENO_LNNO(abfd, ext) bfd_h_get_32(abfd, (bfd_byte *) (ext->l_lnno));
96#define PUT_LINENO_LNNO(abfd,val, ext) bfd_h_put_32(abfd,val,  (bfd_byte *) (ext->l_lnno));
97
98#define	LINENO	struct external_lineno
99#define	LINESZ	8
100
101
102/********************** SYMBOLS **********************/
103
104#define E_SYMNMLEN	8	/* # characters in a symbol name	*/
105#define E_FILNMLEN	14	/* # characters in a file name		*/
106#define E_DIMNUM	4	/* # array dimensions in auxiliary entry */
107
108struct external_syment
109{
110  union {
111    char e_name[E_SYMNMLEN];
112    struct {
113      char e_zeroes[4];
114      char e_offset[4];
115    } e;
116  } e;
117  char e_value[4];
118  char e_scnum[2];
119  char e_type[2];
120  char e_sclass[1];
121  char e_numaux[1];
122};
123
124
125
126#define N_BTMASK	(017)
127#define N_TMASK		(060)
128#define N_BTSHFT	(4)
129#define N_TSHIFT	(2)
130
131
132union external_auxent {
133	struct {
134		char x_tagndx[4];	/* str, un, or enum tag indx */
135		union {
136			struct {
137			    char  x_lnno[2]; /* declaration line number */
138			    char  x_size[2]; /* str/union/array size */
139			} x_lnsz;
140			char x_fsize[4];	/* size of function */
141		} x_misc;
142		union {
143			struct {		/* if ISFCN, tag, or .bb */
144			    char x_lnnoptr[4];	/* ptr to fcn line # */
145			    char x_endndx[4];	/* entry ndx past block end */
146			} x_fcn;
147			struct {		/* if ISARY, up to 4 dimen. */
148			    char x_dimen[E_DIMNUM][2];
149			} x_ary;
150		} x_fcnary;
151		char x_tvndx[2];		/* tv index */
152	} x_sym;
153
154	union {
155		char x_fname[E_FILNMLEN];
156		struct {
157			char x_zeroes[4];
158			char x_offset[4];
159		} x_n;
160	} x_file;
161
162	struct {
163		char x_scnlen[4];			/* section length */
164		char x_nreloc[2];	/* # relocation entries */
165		char x_nlinno[2];	/* # line numbers */
166	} x_scn;
167
168        struct {
169		char x_tvfill[4];	/* tv fill value */
170		char x_tvlen[2];	/* length of .tv */
171		char x_tvran[2][2];	/* tv range */
172	} x_tv;		/* info about .tv section (in auxent of symbol .tv)) */
173
174
175};
176
177#define	SYMENT	struct external_syment
178#define	SYMESZ	18
179#define	AUXENT	union external_auxent
180#define	AUXESZ	18
181
182
183
184/********************** RELOCATION DIRECTIVES **********************/
185
186/* The external reloc has an offset field, because some of the reloc
187   types on the h8 don't have room in the instruction for the entire
188   offset - eg the strange jump and high page addressing modes */
189
190struct external_reloc {
191  char r_vaddr[4];
192  char r_symndx[4];
193  char r_offset[4];
194  char r_type[2];
195  char r_stuff[2];
196};
197
198
199#define RELOC struct external_reloc
200#define RELSZ 16
201
202/* SH relocation types.  Not all of these are actually used.  */
203
204#define R_SH_UNUSED	0		/* only used internally */
205#define R_SH_PCREL8 	3		/*  8 bit pcrel 	*/
206#define R_SH_PCREL16 	4		/* 16 bit pcrel 	*/
207#define R_SH_HIGH8  	5		/* high 8 bits of 24 bit address */
208#define R_SH_LOW16 	7		/* low 16 bits of 24 bit immediate */
209#define R_SH_IMM24	6		/* 24 bit immediate */
210#define R_SH_PCDISP8BY4	9  		/* PC rel 8 bits *4 +ve */
211#define R_SH_PCDISP8BY2	10  		/* PC rel 8 bits *2 +ve */
212#define R_SH_PCDISP8    11  		/* 8 bit branch */
213#define R_SH_PCDISP     12  		/* 12 bit branch */
214#define R_SH_IMM32      14    		/* 32 bit immediate */
215#define R_SH_IMM8   	16		/* 8 bit immediate */
216#define R_SH_IMM8BY2    17		/* 8 bit immediate *2 */
217#define R_SH_IMM8BY4    18		/* 8 bit immediate *4 */
218#define R_SH_IMM4   	19		/* 4 bit immediate */
219#define R_SH_IMM4BY2    20		/* 4 bit immediate *2 */
220#define R_SH_IMM4BY4    21		/* 4 bit immediate *4 */
221#define R_SH_PCRELIMM8BY2   22		/* PC rel 8 bits *2 unsigned */
222#define R_SH_PCRELIMM8BY4   23		/* PC rel 8 bits *4 unsigned */
223#define R_SH_IMM16      24    		/* 16 bit immediate */
224
225/* The switch table reloc types are used for relaxing.  They are
226   generated for expressions such as
227     .word L1 - L2
228   The r_offset field holds the difference between the reloc address
229   and L2.  */
230#define R_SH_SWITCH8	33		/* 8 bit switch table entry */
231#define R_SH_SWITCH16	25		/* 16 bit switch table entry */
232#define R_SH_SWITCH32	26		/* 32 bit switch table entry */
233
234/* The USES reloc type is used for relaxing.  The compiler will
235   generate .uses pseudo-ops when it finds a function call which it
236   can relax.  The r_offset field of the USES reloc holds the PC
237   relative offset to the instruction which loads the register used in
238   the function call.  */
239#define R_SH_USES	27		/* .uses pseudo-op */
240
241/* The COUNT reloc type is used for relaxing.  The assembler will
242   generate COUNT relocs for addresses referred to by the register
243   loads associated with USES relocs.  The r_offset field of the COUNT
244   reloc holds the number of times the address is referenced in the
245   object file.  */
246#define R_SH_COUNT	28		/* Count of constant pool uses */
247
248/* The ALIGN reloc type is used for relaxing.  The r_offset field is
249   the power of two to which subsequent portions of the object file
250   must be aligned.  */
251#define R_SH_ALIGN	29		/* .align pseudo-op */
252
253/* The CODE and DATA reloc types are used for aligning load and store
254   instructions.  The assembler will generate a CODE reloc before a
255   block of instructions.  It will generate a DATA reloc before data.
256   A section should be processed assuming it contains data, unless a
257   CODE reloc is seen.  The only relevant pieces of information in the
258   CODE and DATA relocs are the section and the address.  The symbol
259   and offset are meaningless.  */
260#define R_SH_CODE	30		/* start of code */
261#define R_SH_DATA	31		/* start of data */
262
263/* The LABEL reloc type is used for aligning load and store
264   instructions.  The assembler will generate a LABEL reloc for each
265   label within a block of instructions.  This permits the linker to
266   avoid swapping instructions which are the targets of branches.  */
267#define R_SH_LABEL	32		/* label */
268
269/* NB: R_SH_SWITCH8 is 33 */
270