Bug #17823 ยป ruby-addr2line-interpret-DW_RLE_start_length-r1.patch
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read_dw_form_addr(DebugInfoReader *reader, const char **ptr)
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{
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const char *p = *ptr;
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*ptr = p + reader->format;
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if (reader->format == 4) {
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*ptr = p + reader->address_size;
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if (reader->address_size == 4) {
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return read_uint32(&p);
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} else if (reader->format == 8) {
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} else if (reader->address_size == 8) {
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return read_uint64(&p);
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} else {
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fprintf(stderr,"unknown address_size:%d", reader->address_size);
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| ... | ... | |
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/* TODO: support base address selection entry */
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char *p;
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uint64_t base = ptr->low_pc_set ? ptr->low_pc : reader->current_low_pc;
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bool base_valid = true;
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if (reader->obj->debug_rnglists.ptr) {
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p = reader->obj->debug_rnglists.ptr + ptr->ranges;
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for (;;) {
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uint8_t rle = read_uint8(&p);
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uintptr_t base_address = 0;
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uintptr_t from, to;
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uintptr_t from = 0, to = 0;
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if (rle == DW_RLE_end_of_list) break;
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switch (rle) {
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case DW_RLE_base_addressx:
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uleb128(&p);
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base_valid = false; /* not supported yet */
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break;
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case DW_RLE_startx_endx:
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uleb128(&p);
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| ... | ... | |
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uleb128(&p);
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break;
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case DW_RLE_offset_pair:
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from = base_address + uleb128(&p);
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to = base_address + uleb128(&p);
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if (base + from <= addr && addr < base + to) {
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return from;
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}
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if (!base_valid) break;
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from = (uintptr_t)base + uleb128(&p);
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to = (uintptr_t)base + uleb128(&p);
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break;
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case DW_RLE_base_address:
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base_address = (uintptr_t)read_dw_form_addr(reader, &p);
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base = read_dw_form_addr(reader, &p);
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base_valid = true;
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break;
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case DW_RLE_start_end:
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read_dw_form_addr(reader, &p);
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read_dw_form_addr(reader, &p);
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from = (uintptr_t)read_dw_form_addr(reader, &p);
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to = (uintptr_t)read_dw_form_addr(reader, &p);
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break;
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case DW_RLE_start_length:
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read_dw_form_addr(reader, &p);
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uleb128(&p);
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from = (uintptr_t)read_dw_form_addr(reader, &p);
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to = from + uleb128(&p);
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break;
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}
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if (from <= addr && addr < to) {
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return from;
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}
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}
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return false;
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}
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| ... | ... | |
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base = to;
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}
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else if (base + from <= addr && addr < base + to) {
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return from;
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return (uintptr_t)base + from;
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}
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}
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}
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