diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/dwarf2out.c | 25 |
2 files changed, 31 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 1433190..56aec8f 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2018-04-28 Mark Wielaard <mark@klomp.org> + + * dwarf2out.c (dwarf2out_finish): Add .debug_addr table header for + dwarf_version >= 5. + (dwarf_AT): Handle DW_AT_addr_base. + (add_top_level_skeleton_die_attrs): Use dwarf_AT for DW_AT_addr_base. + 2018-04-28 Uros Bizjak <ubizjak@gmail.com> PR target/84431 diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c index d3d925d..d2d4ec0 100644 --- a/gcc/dwarf2out.c +++ b/gcc/dwarf2out.c @@ -1724,6 +1724,11 @@ dwarf_AT (enum dwarf_attribute at) return DW_AT_GNU_dwo_name; break; + case DW_AT_addr_base: + if (dwarf_version < 5) + return DW_AT_GNU_addr_base; + break; + default: break; } @@ -11106,7 +11111,7 @@ add_top_level_skeleton_die_attrs (dw_die_ref die) if (comp_dir != NULL) add_skeleton_AT_string (die, DW_AT_comp_dir, comp_dir); add_AT_pubnames (die); - add_AT_lineptr (die, DW_AT_GNU_addr_base, debug_addr_section_label); + add_AT_lineptr (die, dwarf_AT (DW_AT_addr_base), debug_addr_section_label); } /* Output skeleton debug sections that point to the dwo file. */ @@ -31293,6 +31298,24 @@ dwarf2out_finish (const char *) } switch_to_section (debug_addr_section); + /* GNU DebugFission https://gcc.gnu.org/wiki/DebugFission + which GCC uses to implement -gsplit-dwarf as DWARF GNU extension + before DWARF5, didn't have a header for .debug_addr units. + DWARF5 specifies a small header when address tables are used. */ + if (dwarf_version >= 5) + { + unsigned long addrs_length + = addr_index_table->elements () * DWARF2_ADDR_SIZE + 4; + + if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4) + dw2_asm_output_data (4, 0xffffffff, + "Escape value for 64-bit DWARF extension"); + dw2_asm_output_data (DWARF_OFFSET_SIZE, addrs_length, + "Length of Address Unit"); + dw2_asm_output_data (2, 5, "DWARF addr version"); + dw2_asm_output_data (1, DWARF2_ADDR_SIZE, "Size of Address"); + dw2_asm_output_data (1, 0, "Size of Segment Descriptor"); + } ASM_OUTPUT_LABEL (asm_out_file, debug_addr_section_label); output_addr_table (); } |