Commit | Line | Data |
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252b5132 RH |
1 | /* Basic coff information for the PowerPC |
2 | * | |
3 | * Based on coff/rs6000.h, coff/i386.h and others. | |
4 | * | |
5 | * Initial release: Kim Knuttila (krk@cygnus.com) | |
6 | */ | |
7 | ||
8 | /********************** FILE HEADER **********************/ | |
9 | ||
10 | struct external_filehdr { | |
11 | char f_magic[2]; /* magic number */ | |
12 | char f_nscns[2]; /* number of sections */ | |
13 | char f_timdat[4]; /* time & date stamp */ | |
14 | char f_symptr[4]; /* file pointer to symtab */ | |
15 | char f_nsyms[4]; /* number of symtab entries */ | |
16 | char f_opthdr[2]; /* sizeof(optional hdr) */ | |
17 | char f_flags[2]; /* flags */ | |
18 | }; | |
19 | ||
20 | #define FILHDR struct external_filehdr | |
21 | #define FILHSZ 20 | |
22 | ||
23 | /* Bits for f_flags: | |
24 | * F_RELFLG relocation info stripped from file | |
25 | * F_EXEC file is executable (no unresolved external references) | |
26 | * F_LNNO line numbers stripped from file | |
27 | * F_LSYMS local symbols stripped from file | |
28 | * F_AR32WR file has byte ordering of an AR32WR machine (e.g. vax) | |
29 | */ | |
30 | ||
31 | #define F_RELFLG (0x0001) | |
32 | #define F_EXEC (0x0002) | |
33 | #define F_LNNO (0x0004) | |
34 | #define F_LSYMS (0x0008) | |
35 | ||
36 | /* extra NT defines */ | |
37 | #define PPCMAGIC 0760 /* peeked on aa PowerPC Windows NT box */ | |
38 | #define DOSMAGIC 0x5a4d /* from arm.h, i386.h */ | |
39 | #define NT_SIGNATURE 0x00004550 /* from arm.h, i386.h */ | |
40 | ||
41 | /* from winnt.h */ | |
42 | #define IMAGE_NT_OPTIONAL_HDR_MAGIC 0x10b | |
43 | ||
44 | #define PPCBADMAG(x) ((x).f_magic != PPCMAGIC) | |
45 | ||
46 | /********************** AOUT "OPTIONAL HEADER" **********************/ | |
47 | ||
48 | typedef struct | |
49 | { | |
50 | char magic[2]; /* type of file */ | |
51 | char vstamp[2]; /* version stamp */ | |
52 | char tsize[4]; /* text size in bytes, padded to FW bdry*/ | |
53 | char dsize[4]; /* initialized data " " */ | |
54 | char bsize[4]; /* uninitialized data " " */ | |
55 | char entry[4]; /* entry pt. */ | |
56 | char text_start[4]; /* base of text used for this file */ | |
57 | char data_start[4]; /* base of data used for this file */ | |
58 | } | |
59 | AOUTHDR; | |
60 | ||
61 | #define AOUTSZ 28 | |
62 | #define AOUTHDRSZ 28 | |
63 | ||
64 | /********************** SECTION HEADER **********************/ | |
65 | ||
66 | struct external_scnhdr { | |
67 | char s_name[8]; /* section name */ | |
68 | char s_paddr[4]; /* physical address, aliased s_nlib */ | |
69 | char s_vaddr[4]; /* virtual address */ | |
70 | char s_size[4]; /* section size */ | |
71 | char s_scnptr[4]; /* file ptr to raw data for section */ | |
72 | char s_relptr[4]; /* file ptr to relocation */ | |
73 | char s_lnnoptr[4]; /* file ptr to line numbers */ | |
74 | char s_nreloc[2]; /* number of relocation entries */ | |
75 | char s_nlnno[2]; /* number of line number entries */ | |
76 | char s_flags[4]; /* flags */ | |
77 | }; | |
78 | ||
79 | #define SCNHDR struct external_scnhdr | |
80 | #define SCNHSZ 40 | |
81 | ||
82 | /* | |
83 | * names of "special" sections | |
84 | */ | |
85 | #define _TEXT ".text" | |
86 | #define _DATA ".data" | |
87 | #define _BSS ".bss" | |
88 | #define _COMMENT ".comment" | |
89 | #define _LIB ".lib" | |
90 | ||
91 | /********************** LINE NUMBERS **********************/ | |
92 | ||
93 | /* 1 line number entry for every "breakpointable" source line in a section. | |
94 | * Line numbers are grouped on a per function basis; first entry in a function | |
95 | * grouping will have l_lnno = 0 and in place of physical address will be the | |
96 | * symbol table index of the function name. | |
97 | */ | |
98 | struct external_lineno { | |
99 | union { | |
100 | char l_symndx[4]; /* function name symbol index, iff l_lnno == 0 */ | |
101 | char l_paddr[4]; /* (physical) address of line number */ | |
102 | } l_addr; | |
103 | char l_lnno[2]; /* line number */ | |
104 | }; | |
105 | ||
106 | #define LINENO struct external_lineno | |
107 | #define LINESZ 6 | |
108 | ||
109 | /********************** SYMBOLS **********************/ | |
110 | ||
111 | #define E_SYMNMLEN 8 /* # characters in a symbol name */ | |
112 | ||
113 | /* Allow the file name length to be overridden in the including file */ | |
114 | #ifndef E_FILNMLEN | |
115 | #define E_FILNMLEN 14 | |
116 | #endif | |
117 | ||
118 | #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ | |
119 | ||
120 | struct external_syment | |
121 | { | |
122 | union { | |
123 | char e_name[E_SYMNMLEN]; | |
124 | struct { | |
125 | char e_zeroes[4]; | |
126 | char e_offset[4]; | |
127 | } e; | |
128 | } e; | |
129 | char e_value[4]; | |
130 | char e_scnum[2]; | |
131 | char e_type[2]; | |
132 | char e_sclass[1]; | |
133 | char e_numaux[1]; | |
134 | }; | |
135 | ||
136 | #define SYMENT struct external_syment | |
137 | #define SYMESZ 18 | |
138 | ||
139 | #define N_BTMASK (0xf) | |
140 | #define N_TMASK (0x30) | |
141 | #define N_BTSHFT (4) | |
142 | #define N_TSHIFT (2) | |
143 | ||
144 | union external_auxent { | |
145 | struct { | |
146 | char x_tagndx[4]; /* str, un, or enum tag indx */ | |
147 | union { | |
148 | struct { | |
149 | char x_lnno[2]; /* declaration line number */ | |
150 | char x_size[2]; /* str/union/array size */ | |
151 | } x_lnsz; | |
152 | char x_fsize[4]; /* size of function */ | |
153 | } x_misc; | |
154 | union { | |
155 | struct { /* if ISFCN, tag, or .bb */ | |
156 | char x_lnnoptr[4]; /* ptr to fcn line # */ | |
157 | char x_endndx[4]; /* entry ndx past block end */ | |
158 | } x_fcn; | |
159 | struct { /* if ISARY, up to 4 dimen. */ | |
160 | char x_dimen[E_DIMNUM][2]; | |
161 | } x_ary; | |
162 | } x_fcnary; | |
163 | char x_tvndx[2]; /* tv index */ | |
164 | } x_sym; | |
165 | ||
166 | union { | |
167 | char x_fname[E_FILNMLEN]; | |
168 | struct { | |
169 | char x_zeroes[4]; | |
170 | char x_offset[4]; | |
171 | } x_n; | |
172 | } x_file; | |
173 | ||
174 | struct { | |
175 | char x_scnlen[4]; /* section length */ | |
176 | char x_nreloc[2]; /* # relocation entries */ | |
177 | char x_nlinno[2]; /* # line numbers */ | |
178 | char x_checksum[4]; /* section COMDAT checksum */ | |
179 | char x_associated[2]; /* COMDAT associated section index */ | |
180 | char x_comdat[1]; /* COMDAT selection number */ | |
181 | } x_scn; | |
182 | }; | |
183 | ||
184 | #define AUXENT union external_auxent | |
185 | #define AUXESZ 18 | |
186 | ||
187 | #define _ETEXT "etext" | |
188 | ||
189 | /********************** RELOCATION DIRECTIVES **********************/ | |
190 | ||
191 | struct external_reloc { | |
192 | char r_vaddr[4]; | |
193 | char r_symndx[4]; | |
194 | char r_type[2]; | |
195 | }; | |
196 | ||
197 | #define RELOC struct external_reloc | |
198 | #define RELSZ 10 | |
199 |