https://sourceware.org/bugzilla/show_bug.cgi?id=28009
Bug ID: 28009
Summary: mark .gnu.debuglto_.debug_* as SHT_MIPS_DWARF
Product: binutils
Version: 2.37 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: syq at debian dot org
Target Milestone: ---
See also: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99488
When LTO is enabled, debug sections have names like
.gnu.debuglto_.debug_*
and which type is marked as PROGBITS.
While normal debug info for MIPS is marked as SHT_MIPS_DWARF.
So linker fails to merge the two sections, which make the output has
2 section with the same name:
root@mipsel:/build/innoextract/innoextract-1.8# readelf -Wa
debian/innoextract/usr/bin/innoextract | grep debug_info
[32] .debug_info MIPS_DWARF 00000000 09a8c0 1b77ef 00 0 0
1
[40] .debug_info PROGBITS 00000000 4ff4b4 50302b 00 0 0
1
Let's just mark .gnu.debuglto_.debug_* as SHT_MIPS_DWARF.
Index: binutils-2.36.50.20210618/bfd/elfxx-mips.c
===================================================================
--- binutils-2.36.50.20210618.orig/bfd/elfxx-mips.c
+++ binutils-2.36.50.20210618/bfd/elfxx-mips.c
@@ -7448,7 +7448,9 @@ _bfd_mips_elf_section_from_shdr (bfd *ab
break;
case SHT_MIPS_DWARF:
if (! startswith (name, ".debug_")
- && ! startswith (name, ".zdebug_"))
+ && ! startswith (name, ".gnu.debuglto_.debug_")
+ && ! startswith (name, ".zdebug_")
+ && ! startswith (name, ".gnu.debuglto_.zdebug_"))
return false;
break;
case SHT_MIPS_SYMBOL_LIB:
@@ -7669,7 +7671,9 @@ _bfd_mips_elf_fake_sections (bfd *abfd,
hdr->sh_entsize = sizeof (Elf_External_ABIFlags_v0);
}
else if (startswith (name, ".debug_")
- || startswith (name, ".zdebug_"))
+ || startswith (name, ".gnu.debuglto_.debug_")
+ || startswith (name, ".zdebug_")
+ || startswith (name, ".gnu.debuglto_.zdebug_"))
{
hdr->sh_type = SHT_MIPS_DWARF;
--
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