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134 lines
2.9 KiB
C
134 lines
2.9 KiB
C
/* bc-emit.h - declare entry points for producing object files of bytecodes. */
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/* Internal format of symbol table for the object file. */
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struct bc_sym
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{
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/* Private copy separately malloc'd. */
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char *name;
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/* Symbol has a defined value. */
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unsigned int defined:1;
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/* Symbol has been globalized. */
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unsigned int global:1;
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/* Symbol is common. */
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unsigned int common:1;
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/* Value if defined. */
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unsigned long int val;
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/* Used in internal symbol table structure. */
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struct bc_sym *next;
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};
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/* List of symbols defined in a particular segment. */
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struct bc_segsym
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{
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struct bc_sym *sym;
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struct bc_segsym *next;
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};
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/* List of relocations needed in a particular segment. */
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struct bc_segreloc
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{
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/* Offset of datum to be relocated. */
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unsigned int offset;
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/* Symbol to be relocated by. */
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struct bc_sym *sym;
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struct bc_segreloc *next;
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};
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/* Segment of an object file. */
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struct bc_seg
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{
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/* Size allocated to contents. */
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unsigned int alloc;
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/* Pointer to base of contents. */
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char *data;
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/* Actual size of contents. */
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unsigned int size;
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/* List of symbols defined in this segment. */
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struct bc_segsym *syms;
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/* List of relocations for this segment. */
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struct bc_segreloc *relocs;
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};
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/* Anonymous bytecode label within a single function. */
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struct bc_label
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{
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/* Offset of label from start of segment. */
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unsigned int offset;
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/* True when offset is valid. */
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unsigned int defined:1;
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/* Unique bytecode ID, used to determine innermost
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block containment */
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int uid;
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/* Next node in list */
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struct bc_label *next;
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};
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/* Reference to a bc_label; a list of all such references is kept for
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the function, then when it is finished they are backpatched to
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contain the correct values. */
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struct bc_labelref
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{
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/* Label referenced. */
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struct bc_label *label;
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/* Code offset of reference. */
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unsigned int offset;
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/* Next labelref in list */
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struct bc_labelref *next;
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};
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extern void bc_initialize();
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extern int bc_begin_function();
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extern char *bc_emit_trampoline();
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extern void bc_emit_bytecode();
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extern void bc_emit_bytecode_const();
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extern struct bc_label *bc_get_bytecode_label();
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extern int bc_emit_bytecode_labeldef();
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extern void bc_emit_bytecode_labelref();
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extern void bc_emit_code_labelref();
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extern char *bc_end_function();
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extern void bc_align_const();
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extern void bc_emit_const();
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extern void bc_emit_const_skip();
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extern int bc_emit_const_labeldef();
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extern void bc_emit_const_labelref();
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extern void bc_align_data();
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extern void bc_emit_data();
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extern void bc_emit_data_skip();
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extern int bc_emit_data_labeldef();
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extern void bc_emit_data_labelref();
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extern int bc_define_pointer ();
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extern int bc_emit_common();
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extern void bc_globalize_label();
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extern void bc_text();
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extern void bc_data();
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extern void bc_align();
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extern void bc_emit();
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extern void bc_emit_skip();
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extern int bc_emit_labeldef();
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extern void bc_emit_labelref();
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extern void bc_write_file();
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