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1.1 root 1: /* bc-emit.h - declare entry points for producing object files of bytecodes. */
2:
3: /* Internal format of symbol table for the object file. */
4: struct bc_sym
5: {
6: /* Private copy separately malloc'd. */
7: char *name;
8:
9: /* Symbol has a defined value. */
10: unsigned int defined:1;
11:
12: /* Symbol has been globalized. */
13: unsigned int global:1;
14:
15: /* Symbol is common. */
16: unsigned int common:1;
17:
18: /* Value if defined. */
19: unsigned long int val;
20:
21: /* Used in internal symbol table structure. */
22: struct bc_sym *next;
23: };
24:
25:
26: /* List of symbols defined in a particular segment. */
27: struct bc_segsym
28: {
29: struct bc_sym *sym;
30: struct bc_segsym *next;
31: };
32:
33:
34: /* List of relocations needed in a particular segment. */
35: struct bc_segreloc
36: {
37: /* Offset of datum to be relocated. */
38: unsigned int offset;
39:
40: /* Symbol to be relocated by. */
41: struct bc_sym *sym;
42:
43: struct bc_segreloc *next;
44: };
45:
46:
47: /* Segment of an object file. */
48: struct bc_seg
49: {
50: /* Size allocated to contents. */
51: unsigned int alloc;
52:
53: /* Pointer to base of contents. */
54: char *data;
55:
56: /* Actual size of contents. */
57: unsigned int size;
58:
59: /* List of symbols defined in this segment. */
60: struct bc_segsym *syms;
61:
62: /* List of relocations for this segment. */
63: struct bc_segreloc *relocs;
64: };
65:
66:
67: /* Anonymous bytecode label within a single function. */
68: struct bc_label
69: {
70: /* Offset of label from start of segment. */
71: unsigned int offset;
72:
73: /* True when offset is valid. */
74: unsigned int defined:1;
75:
76: /* Unique bytecode ID, used to determine innermost
77: block containment */
78: int uid;
79:
80: /* Next node in list */
81: struct bc_label *next;
82: };
83:
84:
85: /* Reference to a bc_label; a list of all such references is kept for
86: the function, then when it is finished they are backpatched to
87: contain the correct values. */
88:
89: struct bc_labelref
90: {
91: /* Label referenced. */
92: struct bc_label *label;
93:
94: /* Code offset of reference. */
95: unsigned int offset;
96:
97: /* Next labelref in list */
98: struct bc_labelref *next;
99: };
100:
101:
102:
103: extern void bc_initialize();
104: extern int bc_begin_function();
105: extern char *bc_emit_trampoline();
106: extern void bc_emit_bytecode();
107: extern void bc_emit_bytecode_const();
108: extern struct bc_label *bc_get_bytecode_label();
109: extern int bc_emit_bytecode_labeldef();
110: extern void bc_emit_bytecode_labelref();
111: extern void bc_emit_code_labelref();
112: extern char *bc_end_function();
113: extern void bc_align_const();
114: extern void bc_emit_const();
115: extern void bc_emit_const_skip();
116: extern int bc_emit_const_labeldef();
117: extern void bc_emit_const_labelref();
118: extern void bc_align_data();
119: extern void bc_emit_data();
120: extern void bc_emit_data_skip();
121: extern int bc_emit_data_labeldef();
122: extern void bc_emit_data_labelref();
123: extern int bc_define_pointer ();
124: extern int bc_emit_common();
125: extern void bc_globalize_label();
126: extern void bc_text();
127: extern void bc_data();
128: extern void bc_align();
129: extern void bc_emit();
130: extern void bc_emit_skip();
131: extern int bc_emit_labeldef();
132: extern void bc_emit_labelref();
133: extern void bc_write_file();
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