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Annotation of GNUtools/cc/bc-emit.h, revision 1.1

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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