Annotation of src/external/gpl3/binutils.old/dist/gas/write.h, Revision 1.1.1.1
1.1 christos 1: /* write.h
2: Copyright 1987, 1992, 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2001,
3: 2002, 2003, 2005, 2006, 2007
4: Free Software Foundation, Inc.
5:
6: This file is part of GAS, the GNU Assembler.
7:
8: GAS is free software; you can redistribute it and/or modify
9: it under the terms of the GNU General Public License as published by
10: the Free Software Foundation; either version 3, or (at your option)
11: any later version.
12:
13: GAS is distributed in the hope that it will be useful,
14: but WITHOUT ANY WARRANTY; without even the implied warranty of
15: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16: GNU General Public License for more details.
17:
18: You should have received a copy of the GNU General Public License
19: along with GAS; see the file COPYING. If not, write to the Free
20: Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
21: 02110-1301, USA. */
22:
23: #ifndef __write_h__
24: #define __write_h__
25:
26: /* This is the name of a fake symbol which will never appear in the
27: assembler output. S_IS_LOCAL detects it because of the \001. */
28: #ifndef FAKE_LABEL_NAME
29: #define FAKE_LABEL_NAME "L0\001"
30: #endif
31:
32: #include "bit_fix.h"
33:
34: /*
35: * FixSs may be built up in any order.
36: */
37:
38: struct fix
39: {
40: /* These small fields are grouped together for compactness of
41: this structure, and efficiency of access on some architectures. */
42:
43: /* Is this a pc-relative relocation? */
44: unsigned fx_pcrel : 1;
45:
46: /* Is this value an immediate displacement? */
47: /* Only used on ns32k; merge it into TC_FIX_TYPE sometime. */
48: unsigned fx_im_disp : 2;
49:
50: /* Some bits for the CPU specific code. */
51: unsigned fx_tcbit : 1;
52: unsigned fx_tcbit2 : 1;
53:
54: /* Has this relocation already been applied? */
55: unsigned fx_done : 1;
56:
57: /* Suppress overflow complaints on large addends. This is used
58: in the PowerPC ELF config to allow large addends on the
59: BFD_RELOC_{LO16,HI16,HI16_S} relocations.
60:
61: @@ Can this be determined from BFD? */
62: unsigned fx_no_overflow : 1;
63:
64: /* The value is signed when checking for overflow. */
65: unsigned fx_signed : 1;
66:
67: /* pc-relative offset adjust (only used by m68k and m68hc11) */
68: char fx_pcrel_adjust;
69:
70: /* How many bytes are involved? */
71: unsigned char fx_size;
72:
73: /* Which frag does this fix apply to? */
74: fragS *fx_frag;
75:
76: /* Where is the first byte to fix up? */
77: long fx_where;
78:
79: /* NULL or Symbol whose value we add in. */
80: symbolS *fx_addsy;
81:
82: /* NULL or Symbol whose value we subtract. */
83: symbolS *fx_subsy;
84:
85: /* Absolute number we add in. */
86: valueT fx_offset;
87:
88: /* The value of dot when the fixup expression was parsed. */
89: addressT fx_dot_value;
90:
91: /* Next fixS in linked list, or NULL. */
92: struct fix *fx_next;
93:
94: /* If NULL, no bitfix's to do. */
95: /* Only i960-coff and ns32k use this, and i960-coff stores an
96: integer. This can probably be folded into tc_fix_data, below.
97: @@ Alpha also uses it, but only to disable certain relocation
98: processing. */
99: bit_fixS *fx_bit_fixP;
100:
101: bfd_reloc_code_real_type fx_r_type;
102:
103: /* This field is sort of misnamed. It appears to be a sort of random
104: scratch field, for use by the back ends. The main gas code doesn't
105: do anything but initialize it to zero. The use of it does need to
106: be coordinated between the cpu and format files, though. E.g., some
107: coff targets pass the `addend' field from the cpu file via this
108: field. I don't know why the `fx_offset' field above can't be used
109: for that; investigate later and document. KR */
110: valueT fx_addnumber;
111:
112: /* The location of the instruction which created the reloc, used
113: in error messages. */
114: char *fx_file;
115: unsigned fx_line;
116:
117: #ifdef USING_CGEN
118: struct {
119: /* CGEN_INSN entry for this instruction. */
120: const struct cgen_insn *insn;
121: /* Target specific data, usually reloc number. */
122: int opinfo;
123: /* Which ifield this fixup applies to. */
124: struct cgen_maybe_multi_ifield * field;
125: /* is this field is the MSB field in a set? */
126: int msb_field_p;
127: } fx_cgen;
128: #endif
129:
130: #ifdef TC_FIX_TYPE
131: /* Location where a backend can attach additional data
132: needed to perform fixups. */
133: TC_FIX_TYPE tc_fix_data;
134: #endif
135: };
136:
137: typedef struct fix fixS;
138:
139: struct reloc_list
140: {
141: struct reloc_list *next;
142: union
143: {
144: struct
145: {
146: symbolS *offset_sym;
147: reloc_howto_type *howto;
148: symbolS *sym;
149: bfd_vma addend;
150: } a;
151: struct
152: {
153: asection *sec;
154: asymbol *s;
155: arelent r;
156: } b;
157: } u;
158: char *file;
159: unsigned int line;
160: };
161:
162: extern int finalize_syms;
163: extern symbolS *abs_section_sym;
164: extern addressT dot_value;
165: extern struct reloc_list* reloc_list;
166:
167: extern void append (char **charPP, char *fromP, unsigned long length);
168: extern void record_alignment (segT seg, int align);
169: extern int get_recorded_alignment (segT seg);
170: extern void subsegs_finish (void);
171: extern void write_object_file (void);
172: extern long relax_frag (segT, fragS *, long);
173: extern int relax_segment (struct frag *, segT, int);
174: extern void number_to_chars_littleendian (char *, valueT, int);
175: extern void number_to_chars_bigendian (char *, valueT, int);
176: extern fixS *fix_new
177: (fragS * frag, int where, int size, symbolS * add_symbol,
178: offsetT offset, int pcrel, bfd_reloc_code_real_type r_type);
179: extern fixS *fix_at_start
180: (fragS * frag, int size, symbolS * add_symbol,
181: offsetT offset, int pcrel, bfd_reloc_code_real_type r_type);
182: extern fixS *fix_new_exp
183: (fragS * frag, int where, int size, expressionS *exp, int pcrel,
184: bfd_reloc_code_real_type r_type);
185: extern void write_print_statistics (FILE *);
186:
187: #endif /* __write_h__ */
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