libkern/kxld/kxld_reloc.c

117 static kern_return_t generic_process_reloc(const KXLDRelocator *relocator,
130 static kern_return_t x86_64_process_reloc(const KXLDRelocator *relocator,
145 static kern_return_t arm_process_reloc(const KXLDRelocator *relocator,
152 static kxld_addr_t get_pointer_at_addr_32(const KXLDRelocator *relocator,
157 static kxld_addr_t get_pointer_at_addr_64(const KXLDRelocator *relocator,
162 static u_int count_relocatable_relocs(const KXLDRelocator *relocator,
166 static kern_return_t calculate_targets(KXLDRelocator *relocator,
169 static kxld_addr_t align_raw_function_address(const KXLDRelocator *relocator,
176     const KXLDRelocator *relocator, u_long offset);
181 static kern_return_t export_macho_for_array(const KXLDRelocator *relocator,
188 kxld_relocator_init(KXLDRelocator *relocator, u_char *file,
194     check(relocator);
199         relocator->reloc_has_pair = generic_reloc_has_pair;
200         relocator->reloc_get_pair_type = generic_reloc_get_pair_type;
201         relocator->reloc_has_got = generic_reloc_has_got;
202         relocator->process_reloc = generic_process_reloc;
203         relocator->function_align = 0;
204         relocator->is_32_bit = TRUE;
205         relocator->may_scatter = TRUE;
210         relocator->reloc_has_pair = x86_64_reloc_has_pair;
211         relocator->reloc_get_pair_type = x86_64_reloc_get_pair_type;
212         relocator->reloc_has_got = x86_64_reloc_has_got;
213         relocator->process_reloc = x86_64_process_reloc;
214         relocator->function_align = 0;
215         relocator->is_32_bit = FALSE;
216         relocator->may_scatter = FALSE;
221         relocator->reloc_has_pair = arm_reloc_has_pair;
222         relocator->reloc_get_pair_type = arm_reloc_get_pair_type;
223         relocator->reloc_has_got = arm_reloc_has_got;
224         relocator->process_reloc = arm_process_reloc;
225         relocator->function_align = 1;
226         relocator->is_32_bit = TRUE;
227         relocator->may_scatter = FALSE;
237     relocator->file = file;
238     relocator->symtab = symtab;
239     relocator->sectarray = sectarray;
240     relocator->is_32_bit = kxld_is_32_bit(cputype);
241     relocator->swap = swap;
252 kxld_reloc_create_macho(KXLDArray *relocarray, const KXLDRelocator *relocator,
273     nrelocs = count_relocatable_relocs(relocator, srcs, nsrcs);
292             if (!(relocator->may_scatter && (src->r_address & R_SCATTERED)) &&
305             if (relocator->may_scatter && (src->r_address & R_SCATTERED)) {
329             if (relocator->reloc_has_pair(reloc->reloc_type)) {
336                 if (relocator->may_scatter && (src->r_address & R_SCATTERED)) {
337                     require_action(relocator->reloc_get_pair_type(
344                     require_action(relocator->reloc_get_pair_type(
358                 if (relocator->reloc_has_got(reloc->reloc_type)) {
380 count_relocatable_relocs(const KXLDRelocator *relocator,
388     check(relocator);
404                 !relocator->reloc_has_pair(sreloc->r_type);
410                 !(relocator->reloc_has_pair(reloc->r_type)
422 kxld_relocator_clear(KXLDRelocator *relocator)
424     bzero(relocator, sizeof(*relocator));
430 kxld_relocator_has_pair(const KXLDRelocator *relocator, u_int r_type)
432     check(relocator);
434     return relocator->reloc_has_pair(r_type);
440 kxld_relocator_get_pair_type(const KXLDRelocator *relocator,
443     check(relocator);
445     return relocator->reloc_get_pair_type(prev_r_type);
451 kxld_relocator_has_got(const KXLDRelocator *relocator, u_int r_type)
453     check(relocator);
455     return relocator->reloc_has_got(r_type);
461 kxld_reloc_get_symbol(const KXLDRelocator *relocator, const KXLDReloc *reloc,
471         sym = kxld_symtab_get_symbol_by_index(relocator->symtab, reloc->target);
475             value = kxld_relocator_get_pointer_at_addr(relocator, data,
477             sym = kxld_symtab_get_cxx_symbol_by_value(relocator->symtab, value);
559 kxld_reloc_export_macho(const KXLDRelocator *relocator,
586     rval = export_macho_for_array(relocator, locrelocs, &dst);
589     rval = export_macho_for_array(relocator, extrelocs, &dst);
611 kxld_relocator_get_pointer_at_addr(const KXLDRelocator *relocator,
616     KXLD_3264_FUNC(relocator->is_32_bit, value,
618         relocator, data, offset);
627 get_pointer_at_addr_32(const KXLDRelocator *relocator,
632     check(relocator);
636     if (relocator->swap) {
641     return align_raw_function_address(relocator, addr);
649 get_pointer_at_addr_64(const KXLDRelocator *relocator,
654     check(relocator);
658     if (relocator->swap) {
663     return align_raw_function_address(relocator, addr);
670 kxld_relocator_set_vtables(KXLDRelocator *relocator, const KXLDDict *vtables)
672     relocator->vtables = vtables;
683 align_raw_function_address(const KXLDRelocator *relocator, kxld_addr_t value)
685     if (relocator->function_align) {
686         value &= ~((1ULL << relocator->function_align) - 1);
695 kxld_relocator_process_sect_reloc(KXLDRelocator *relocator,
706     check(relocator);
716     rval = calculate_targets(relocator, &target, &pair_target, reloc);
725     rval = relocator->process_reloc(relocator, instruction, reloc->length,
727         pair_target, relocator->swap);
732     relocator->current_vtable = NULL;
760 kxld_relocator_process_table_reloc(KXLDRelocator *relocator,
771     check(relocator);
777     instruction = relocator->file + offset;
781     rval = calculate_targets(relocator, &target, &pair_target, reloc);
789     rval = relocator->process_reloc(relocator, instruction, reloc->length,
791         pair_target, relocator->swap);
796     relocator->current_vtable = NULL;
806 calculate_targets(KXLDRelocator *relocator, kxld_addr_t *_target,
832             relocator->sectarray);
837                 reloc->pair_target, relocator->sectarray);
849         sect = kxld_array_get_item(relocator->sectarray, reloc->target);
872         sym = kxld_symtab_get_symbol_by_index(relocator->symtab, reloc->target);
890             relocator->current_vtable = kxld_dict_find(relocator->vtables, sym->name);
900             sym = kxld_symtab_get_symbol_by_index(relocator->symtab,
959 check_for_direct_pure_virtual_call(const KXLDRelocator *relocator, u_long offset)
964     if (relocator->current_vtable) {
965         entry = kxld_vtable_get_entry_for_offset(relocator->current_vtable,
966             offset, relocator->is_32_bit);
1007 export_macho_for_array(const KXLDRelocator *relocator,
1070                 scatdst->r_type = relocator->reloc_get_pair_type(reloc->reloc_type);
1078                 dst->r_type = relocator->reloc_get_pair_type(reloc->reloc_type);
1086                 dst->r_type = relocator->reloc_get_pair_type(reloc->reloc_type);
1135 generic_process_reloc(const KXLDRelocator *relocator, u_char *instruction,
1161     rval = check_for_direct_pure_virtual_call(relocator, instr_data);
1226 x86_64_process_reloc(const KXLDRelocator *relocator __unused, u_char *instruction,
1255         rval = check_for_direct_pure_virtual_call(relocator, instr32);
1357         rval = check_for_direct_pure_virtual_call(relocator, (u_long) instr64);
1456 arm_process_reloc(const KXLDRelocator *relocator __unused, u_char *instruction,
1483     rval = check_for_direct_pure_virtual_call(relocator, instr_data);