diff options
| author | Mark Wielaard <[email protected]> | 2018-05-19 00:46:02 +0200 |
|---|---|---|
| committer | Mark Wielaard <[email protected]> | 2018-05-23 00:31:22 +0200 |
| commit | 144b73c49acf3ed894e4635aedb9b0d1208ade2e (patch) | |
| tree | 53ce2f235c75324b4010c419b5d5fe1a524c09ba /libdw/dwarf_lowpc.c | |
| parent | a4c74cc67de22cb3208fc768989c509d6837cd77 (diff) | |
libdw: Handle GNU DebugFission split ranges.
GNU DebugFission split dwarf handles DW_FORM_sec_offset specially for
attributes that point to ranges. The .debug_ranges section is not in
the .dwo file, but in the main/skeleton object file. The sec_offset is
not relocated (in the ELF file), but is an offset against the skeleton
DIE DW_AT_GNU_ranges_base attribute. dwarf_formudata is changed so it
still looks like a normal offset ptr into the .debug_ranges section.
dwarf_ranges is adapted to look for the .debug_ranges in the main object
file. dwarf_highpc and dwarf_lowpc now handle the highpc and lowpc
attributes being inherited for the split unit DIE from the skeleton.
A new testcase is added to iterate over all ranges in a split GNU
DebugFission file.
Signed-off-by: Mark Wielaard <[email protected]>
Diffstat (limited to 'libdw/dwarf_lowpc.c')
| -rw-r--r-- | libdw/dwarf_lowpc.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/libdw/dwarf_lowpc.c b/libdw/dwarf_lowpc.c index b3be2b0e..4d743a72 100644 --- a/libdw/dwarf_lowpc.c +++ b/libdw/dwarf_lowpc.c @@ -1,7 +1,6 @@ /* Return low PC attribute of DIE. - Copyright (C) 2003, 2005 Red Hat, Inc. + Copyright (C) 2003, 2005, 2018 Red Hat, Inc. This file is part of elfutils. - Written by Ulrich Drepper <[email protected]>, 2003. This file is free software; you can redistribute it and/or modify it under the terms of either @@ -38,10 +37,12 @@ int dwarf_lowpc (Dwarf_Die *die, Dwarf_Addr *return_addr) { - Dwarf_Attribute attr_mem; - - return INTUSE(dwarf_formaddr) (INTUSE(dwarf_attr) (die, DW_AT_low_pc, - &attr_mem), - return_addr); + Dwarf_Attribute attr_mem, *attr; + /* Split compile DIEs inherit low_pc from their skeleton DIE. */ + if (is_cudie (die) && die->cu->unit_type == DW_UT_split_compile) + attr = INTUSE(dwarf_attr_integrate) (die, DW_AT_low_pc, &attr_mem); + else + attr = INTUSE(dwarf_attr) (die, DW_AT_low_pc, &attr_mem); + return INTUSE(dwarf_formaddr) (attr, return_addr); } INTDEF(dwarf_lowpc) |