Initial revision

From-SVN: r5386

gcc/bc-emit.h

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