Commit | Line | Data |
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3340f7e5 | 1 | /* write.h |
66a6a381 | 2 | Copyright (C) 1987, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc. |
6efd877d | 3 | |
a39116f1 | 4 | This file is part of GAS, the GNU Assembler. |
6efd877d | 5 | |
a39116f1 RP |
6 | GAS 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 2, or (at your option) | |
9 | any later version. | |
6efd877d | 10 | |
a39116f1 RP |
11 | GAS 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. | |
6efd877d | 15 | |
a39116f1 | 16 | You should have received a copy of the GNU General Public License |
66a6a381 ILT |
17 | along with GAS; see the file COPYING. If not, write to the Free |
18 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
19 | 02111-1307, USA. */ | |
fecd2382 RP |
20 | |
21 | #ifndef TC_I960 | |
22 | #ifdef hpux | |
23 | #define EXEC_MACHINE_TYPE HP9000S200_ID | |
24 | #endif | |
25 | #endif /* TC_I960 */ | |
26 | ||
66a6a381 ILT |
27 | #ifndef BFD_ASSEMBLER |
28 | ||
fecd2382 | 29 | #ifndef LOCAL_LABEL |
fecd2382 | 30 | #define LOCAL_LABEL(name) (name [0] == 'L' ) |
66a6a381 | 31 | #endif |
fecd2382 | 32 | |
66a6a381 ILT |
33 | #define S_LOCAL_NAME(s) (LOCAL_LABEL (S_GET_NAME (s))) |
34 | ||
35 | #endif /* ! BFD_ASSEMBLER */ | |
36 | ||
37 | /* This is the name of a fake symbol which will never appear in the | |
38 | assembler output. S_IS_LOCAL detects it because of the \001. */ | |
39 | #define FAKE_LABEL_NAME "L0\001" | |
fecd2382 | 40 | |
c593cf41 SC |
41 | #include "bit_fix.h" |
42 | ||
fecd2382 RP |
43 | /* |
44 | * FixSs may be built up in any order. | |
45 | */ | |
46 | ||
6efd877d | 47 | struct fix |
66a6a381 ILT |
48 | { |
49 | /* These small fields are grouped together for compactness of | |
50 | this structure, and efficiency of access on some architectures. */ | |
51 | ||
52 | /* pc-relative offset adjust */ | |
53 | char fx_pcrel_adjust; | |
54 | ||
55 | /* How many bytes are involved? */ | |
56 | unsigned char fx_size; | |
57 | ||
58 | /* Is this a pc-relative relocation? */ | |
59 | unsigned fx_pcrel : 1; | |
60 | ||
61 | /* Is this a relocation to a procedure linkage table entry? If so, | |
62 | some of the reductions we try to apply are invalid. A better way | |
63 | might be to represent PLT entries with different kinds of | |
64 | symbols, and use normal relocations (with undefined symbols); | |
65 | look into it for version 2.6. */ | |
66 | unsigned fx_plt : 1; | |
67 | ||
68 | /* Is this value an immediate displacement? */ | |
69 | /* Only used on i960 and ns32k; merge it into TC_FIX_TYPE sometime. */ | |
70 | unsigned fx_im_disp : 2; | |
71 | ||
72 | /* A bit for the CPU specific code. | |
73 | This probably can be folded into tc_fix_data, below. */ | |
74 | unsigned fx_tcbit : 1; | |
75 | ||
76 | /* Has this relocation already been applied? */ | |
77 | unsigned fx_done : 1; | |
78 | ||
79 | /* Suppress overflow complaints on large addends. This is used | |
80 | in the PowerPC ELF config to allow large addends on the | |
81 | BFD_RELOC_{LO16,HI16,HI16_S} relocations. | |
82 | ||
83 | @@ Can this be determined from BFD? */ | |
84 | unsigned fx_no_overflow : 1; | |
85 | ||
86 | /* The value is signed when checking for overflow. */ | |
87 | unsigned fx_signed : 1; | |
88 | ||
89 | /* Which frag does this fix apply to? */ | |
90 | fragS *fx_frag; | |
91 | ||
92 | /* Where is the first byte to fix up? */ | |
93 | long fx_where; | |
94 | ||
95 | /* NULL or Symbol whose value we add in. */ | |
96 | symbolS *fx_addsy; | |
97 | ||
98 | /* NULL or Symbol whose value we subtract. */ | |
99 | symbolS *fx_subsy; | |
100 | ||
101 | /* Absolute number we add in. */ | |
102 | valueT fx_offset; | |
103 | ||
104 | /* Next fixS in linked list, or NULL. */ | |
105 | struct fix *fx_next; | |
106 | ||
107 | /* If NULL, no bitfix's to do. */ | |
108 | /* Only i960-coff and ns32k use this, and i960-coff stores an | |
109 | integer. This can probably be folded into tc_fix_data, below. | |
110 | @@ Alpha also uses it, but only to disable certain relocation | |
111 | processing. */ | |
112 | bit_fixS *fx_bit_fixP; | |
113 | ||
039d8f73 | 114 | #ifdef BFD_ASSEMBLER |
66a6a381 | 115 | bfd_reloc_code_real_type fx_r_type; |
039d8f73 KR |
116 | #else |
117 | #ifdef NEED_FX_R_TYPE | |
66a6a381 ILT |
118 | /* Hack for machines where the type of reloc can't be |
119 | worked out by looking at how big it is. */ | |
120 | int fx_r_type; | |
c593cf41 | 121 | #endif |
039d8f73 KR |
122 | #endif |
123 | ||
66a6a381 ILT |
124 | /* This field is sort of misnamed. It appears to be a sort of random |
125 | scratch field, for use by the back ends. The main gas code doesn't | |
126 | do anything but initialize it to zero. The use of it does need to | |
127 | be coordinated between the cpu and format files, though. E.g., some | |
128 | coff targets pass the `addend' field from the cpu file via this | |
129 | field. I don't know why the `fx_offset' field above can't be used | |
130 | for that; investigate later and document. KR */ | |
131 | valueT fx_addnumber; | |
132 | ||
133 | /* The location of the instruction which created the reloc, used | |
134 | in error messages. */ | |
135 | char *fx_file; | |
136 | unsigned fx_line; | |
137 | ||
138 | #ifdef TC_FIX_TYPE | |
139 | /* Location where a backend can attach additional data | |
140 | needed to perform fixups. */ | |
141 | TC_FIX_TYPE tc_fix_data; | |
142 | #endif | |
143 | }; | |
fecd2382 | 144 | |
a39116f1 | 145 | typedef struct fix fixS; |
fecd2382 | 146 | |
039d8f73 KR |
147 | #ifndef BFD_ASSEMBLER |
148 | extern char *next_object_file_charP; | |
fecd2382 | 149 | |
a39116f1 | 150 | #ifndef MANY_SEGMENTS |
fecd2382 RP |
151 | COMMON fixS *text_fix_root, *text_fix_tail; /* Chains fixSs. */ |
152 | COMMON fixS *data_fix_root, *data_fix_tail; /* Chains fixSs. */ | |
6efd877d | 153 | COMMON fixS *bss_fix_root, *bss_fix_tail; /* Chains fixSs. */ |
66a6a381 ILT |
154 | extern struct frag *text_last_frag; /* Last frag in segment. */ |
155 | extern struct frag *data_last_frag; /* Last frag in segment. */ | |
a39116f1 | 156 | #endif |
fecd2382 | 157 | COMMON fixS **seg_fix_rootP, **seg_fix_tailP; /* -> one of above. */ |
039d8f73 KR |
158 | #endif |
159 | ||
fecd2382 RP |
160 | extern long string_byte_count; |
161 | extern int section_alignment[]; | |
162 | ||
66a6a381 ILT |
163 | extern bit_fixS *bit_fix_new |
164 | PARAMS ((int size, int offset, long base_type, long base_adj, long min, | |
165 | long max, long add)); | |
166 | extern void append PARAMS ((char **charPP, char *fromP, unsigned long length)); | |
167 | extern void record_alignment PARAMS ((segT seg, int align)); | |
168 | extern void subsegs_finish PARAMS ((void)); | |
169 | extern void write_object_file PARAMS ((void)); | |
170 | extern long relax_frag PARAMS ((fragS *, long)); | |
171 | extern void relax_segment | |
172 | PARAMS ((struct frag * seg_frag_root, segT seg_type)); | |
173 | ||
174 | extern void number_to_chars_littleendian PARAMS ((char *, valueT, int)); | |
175 | extern void number_to_chars_bigendian PARAMS ((char *, valueT, int)); | |
039d8f73 KR |
176 | |
177 | #ifdef BFD_ASSEMBLER | |
66a6a381 ILT |
178 | extern fixS *fix_new |
179 | PARAMS ((fragS * frag, int where, int size, symbolS * add_symbol, | |
180 | offsetT offset, int pcrel, bfd_reloc_code_real_type r_type)); | |
181 | extern fixS *fix_new_exp | |
182 | PARAMS ((fragS * frag, int where, int size, expressionS *exp, int pcrel, | |
183 | bfd_reloc_code_real_type r_type)); | |
039d8f73 | 184 | #else |
66a6a381 ILT |
185 | extern fixS *fix_new |
186 | PARAMS ((fragS * frag, int where, int size, symbolS * add_symbol, | |
187 | offsetT offset, int pcrel, int r_type)); | |
188 | extern fixS *fix_new_exp | |
189 | PARAMS ((fragS * frag, int where, int size, expressionS *exp, int pcrel, | |
190 | int r_type)); | |
039d8f73 | 191 | #endif |
fecd2382 | 192 | |
66a6a381 ILT |
193 | extern void write_print_statistics PARAMS ((FILE *)); |
194 | ||
fecd2382 | 195 | /* end of write.h */ |