110 lines
2.7 KiB
C
110 lines
2.7 KiB
C
#define IMAGE_MAGIC 0x0f0e0d0c
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#define IMAGE_VERSION 2
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typedef struct {
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CELL magic;
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CELL version;
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/* all pointers in the image file are relocated from
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relocation_base to here when the image is loaded */
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CELL data_relocation_base;
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/* tagged pointer to bootstrap quotation */
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CELL boot;
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/* tagged pointer to global namespace */
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CELL global;
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/* tagged pointer to t singleton */
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CELL t;
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/* tagged pointer to bignum 0 */
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CELL bignum_zero;
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/* tagged pointer to bignum 1 */
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CELL bignum_pos_one;
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/* tagged pointer to bignum -1 */
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CELL bignum_neg_one;
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/* size of heap */
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CELL data_size;
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/* size of code heap */
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CELL code_size;
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/* code relocation base */
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CELL code_relocation_base;
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} HEADER;
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void init_objects(HEADER *h);
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void load_image(const char* file);
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bool save_image(const char* file);
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void primitive_save_image(void);
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/* relocation base of currently loaded image's data heap */
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CELL data_relocation_base;
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INLINE void data_fixup(CELL *cell)
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{
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if(TAG(*cell) != FIXNUM_TYPE && *cell != F)
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*cell += (tenured.base - data_relocation_base);
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}
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typedef enum {
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/* arg is a primitive number */
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RT_PRIMITIVE,
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/* arg is a literal table index, holding an array pair (symbol/dll) */
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RT_DLSYM,
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/* store current address here */
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RT_HERE,
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/* store the offset of the card table from the data heap base */
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RT_CARDS,
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/* an indirect literal from the word's literal table */
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RT_LITERAL,
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/* a word */
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RT_WORD,
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/* a local label */
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RT_LABEL
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} F_RELTYPE;
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#define REL_ABSOLUTE_CELL 0
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#define REL_ABSOLUTE 1
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#define REL_RELATIVE 2
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#define REL_ABSOLUTE_2_2 3
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#define REL_RELATIVE_2_2 4
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#define REL_RELATIVE_2 5
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#define REL_RELATIVE_3 6
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#define REL_RELATIVE_2_MASK 0x3fffffc
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#define REL_RELATIVE_3_MASK 0xfffc
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/* the rel type is built like a cell to avoid endian-specific code in
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the compiler */
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#define REL_TYPE(r) ((r)->type & 0x000000ff)
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#define REL_CLASS(r) (((r)->type & 0x0000ff00) >> 8)
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#define REL_ARGUMENT(r) (((r)->type & 0xffff0000) >> 16)
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/* code relocation consists of a table of entries for each fixup */
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typedef struct {
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CELL type;
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CELL offset;
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} F_REL;
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CELL code_relocation_base;
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INLINE void code_fixup(CELL *cell)
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{
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*cell += (compiling.base - code_relocation_base);
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}
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void relocate_data();
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void relocate_code_step(F_REL *rel, CELL code_start, CELL literal_start,
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F_VECTOR *labels);
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CELL relocate_code_next(CELL relocating);
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void relocate_code();
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/* on PowerPC, return the 32-bit literal being loaded at the code at the
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given address */
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INLINE CELL reloc_get_2_2(CELL cell)
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{
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return ((get(cell - CELLS) & 0xffff) << 16) | (get(cell) & 0xffff);
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}
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INLINE void reloc_set_2_2(CELL cell, CELL value)
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{
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put(cell - CELLS,((get(cell - CELLS) & ~0xffff) | ((value >> 16) & 0xffff)));
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put(cell,((get(cell) & ~0xffff) | (value & 0xffff)));
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}
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