61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
/* 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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F_PRIMITIVE,
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/* arg is a pointer in the literal table hodling a cons where the
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car is a symbol string, and the cdr is a dll */
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F_DLSYM,
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/* relocate an address to start of code heap */
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F_ABSOLUTE,
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/* store a pointer to environment table */
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F_USERENV,
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/* store the offset of the card table from the data heap base */
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F_CARDS
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} F_RELTYPE;
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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 & 0xff)
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/* on PowerPC, some values are stored in the high 16 bits of a pair
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of consecutive cells */
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#define REL_16_16(r) ((r)->type & 0xff00)
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#define REL_RELATIVE(r) ((r)->type & 0xff0000)
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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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CELL argument;
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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();
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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_16_16(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_16_16(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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