diff options
Diffstat (limited to 'gdb/dwarf2loc.c')
| -rw-r--r-- | gdb/dwarf2loc.c | 81 |
1 files changed, 74 insertions, 7 deletions
diff --git a/gdb/dwarf2loc.c b/gdb/dwarf2loc.c index c1e02eb..8774af4 100644 --- a/gdb/dwarf2loc.c +++ b/gdb/dwarf2loc.c @@ -143,6 +143,57 @@ decode_debug_loc_addresses (const gdb_byte *loc_ptr, const gdb_byte *buf_end, return DEBUG_LOC_START_END; } +/* Decode the addresses in .debug_loclists entry. + A pointer to the next byte to examine is returned in *NEW_PTR. + The encoded low,high addresses are return in *LOW,*HIGH. + The result indicates the kind of entry found. */ + +static enum debug_loc_kind +decode_debug_loclists_addresses (struct dwarf2_per_cu_data *per_cu, + const gdb_byte *loc_ptr, + const gdb_byte *buf_end, + const gdb_byte **new_ptr, + CORE_ADDR *low, CORE_ADDR *high, + enum bfd_endian byte_order, + unsigned int addr_size, + int signed_addr_p) +{ + uint64_t u64; + + if (loc_ptr == buf_end) + return DEBUG_LOC_BUFFER_OVERFLOW; + + switch (*loc_ptr++) + { + case DW_LLE_end_of_list: + *new_ptr = loc_ptr; + return DEBUG_LOC_END_OF_LIST; + case DW_LLE_base_address: + if (loc_ptr + addr_size > buf_end) + return DEBUG_LOC_BUFFER_OVERFLOW; + if (signed_addr_p) + *high = extract_signed_integer (loc_ptr, addr_size, byte_order); + else + *high = extract_unsigned_integer (loc_ptr, addr_size, byte_order); + loc_ptr += addr_size; + *new_ptr = loc_ptr; + return DEBUG_LOC_BASE_ADDRESS; + case DW_LLE_offset_pair: + loc_ptr = gdb_read_uleb128 (loc_ptr, buf_end, &u64); + if (loc_ptr == NULL) + return DEBUG_LOC_BUFFER_OVERFLOW; + *low = u64; + loc_ptr = gdb_read_uleb128 (loc_ptr, buf_end, &u64); + if (loc_ptr == NULL) + return DEBUG_LOC_BUFFER_OVERFLOW; + *high = u64; + *new_ptr = loc_ptr; + return DEBUG_LOC_START_END; + default: + return DEBUG_LOC_INVALID_ENTRY; + } +} + /* Decode the addresses in .debug_loc.dwo entry. A pointer to the next byte to examine is returned in *NEW_PTR. The encoded low,high addresses are return in *LOW,*HIGH. @@ -163,10 +214,10 @@ decode_debug_loc_dwo_addresses (struct dwarf2_per_cu_data *per_cu, switch (*loc_ptr++) { - case DEBUG_LOC_END_OF_LIST: + case DW_LLE_GNU_end_of_list_entry: *new_ptr = loc_ptr; return DEBUG_LOC_END_OF_LIST; - case DEBUG_LOC_BASE_ADDRESS: + case DW_LLE_GNU_base_address_selection_entry: *low = 0; loc_ptr = gdb_read_uleb128 (loc_ptr, buf_end, &high_index); if (loc_ptr == NULL) @@ -174,7 +225,7 @@ decode_debug_loc_dwo_addresses (struct dwarf2_per_cu_data *per_cu, *high = dwarf2_read_addr_index (per_cu, high_index); *new_ptr = loc_ptr; return DEBUG_LOC_BASE_ADDRESS; - case DEBUG_LOC_START_END: + case DW_LLE_GNU_start_end_entry: loc_ptr = gdb_read_uleb128 (loc_ptr, buf_end, &low_index); if (loc_ptr == NULL) return DEBUG_LOC_BUFFER_OVERFLOW; @@ -185,7 +236,7 @@ decode_debug_loc_dwo_addresses (struct dwarf2_per_cu_data *per_cu, *high = dwarf2_read_addr_index (per_cu, high_index); *new_ptr = loc_ptr; return DEBUG_LOC_START_END; - case DEBUG_LOC_START_LENGTH: + case DW_LLE_GNU_start_length_entry: loc_ptr = gdb_read_uleb128 (loc_ptr, buf_end, &low_index); if (loc_ptr == NULL) return DEBUG_LOC_BUFFER_OVERFLOW; @@ -237,11 +288,17 @@ dwarf2_find_location_expression (struct dwarf2_loclist_baton *baton, kind = decode_debug_loc_dwo_addresses (baton->per_cu, loc_ptr, buf_end, &new_ptr, &low, &high, byte_order); - else + else if (dwarf2_version (baton->per_cu) < 5) kind = decode_debug_loc_addresses (loc_ptr, buf_end, &new_ptr, &low, &high, byte_order, addr_size, signed_addr_p); + else + kind = decode_debug_loclists_addresses (baton->per_cu, + loc_ptr, buf_end, &new_ptr, + &low, &high, byte_order, + addr_size, signed_addr_p); + loc_ptr = new_ptr; switch (kind) { @@ -277,8 +334,18 @@ dwarf2_find_location_expression (struct dwarf2_loclist_baton *baton, high += base_address; } - length = extract_unsigned_integer (loc_ptr, 2, byte_order); - loc_ptr += 2; + if (dwarf2_version (baton->per_cu) < 5) + { + length = extract_unsigned_integer (loc_ptr, 2, byte_order); + loc_ptr += 2; + } + else + { + unsigned int bytes_read; + + length = read_unsigned_leb128 (NULL, loc_ptr, &bytes_read); + loc_ptr += bytes_read; + } if (low == high && pc == low) { |