Em Mon, Oct 03, 2022 at 10:56:36AM +0200, Martin Liška escreveu: > I noticed one can't build 5.19 with latest binutils master. I assume "binutils master" means: git://sourceware.org/git/binutils-gdb.git master? - Arnaldo > One see the following error: > [ 1413s] BTF .btf.vmlinux.bin.o > [ 1413s] Unsupported DW_TAG_unspecified_type(0x3b) > [ 1413s] Encountered error while encoding BTF. > > It's caused by DWARF coming from .S files and the change is introduced since > the following binutils revision: > > commit 5578fbf672ee497ea19826edeb509f4cc3e825a8 > Author: Nick Clifton <nickc@xxxxxxxxxx> > Date: Thu Aug 25 11:48:00 2022 +0100 > > GAS: Add a return type tag to DWARF DIEs generated for function symbols. > > for entry.S the output changes to: > > $ as-new --gdwarf-5 --64 -o entry.o entry.S && readelf -wi entry.o > Contents of the .debug_info section: > > Compilation Unit @ offset 0x0: > Length: 0x35 (32-bit) > Version: 5 > Unit Type: DW_UT_compile (1) > Abbrev Offset: 0x0 > Pointer Size: 8 > <0><c>: Abbrev Number: 3 (DW_TAG_unspecified_type) <--- the problematic TAG > <0><d>: Abbrev Number: 1 (DW_TAG_compile_unit) > <e> DW_AT_stmt_list : 0x0 > <12> DW_AT_low_pc : 0x0 > <1a> DW_AT_high_pc : 19 > <1b> DW_AT_name : (indirect string, offset: 0x0): ../arch/x86/entry/entry.S > <1f> DW_AT_comp_dir : (indirect string, offset: 0x1a): /tmp > <23> DW_AT_producer : (indirect string, offset: 0x1f): GNU AS 2.39.50 > <27> DW_AT_language : 32769 (MIPS assembler) > <1><29>: Abbrev Number: 2 (DW_TAG_subprogram) > <2a> DW_AT_name : (indirect string, offset: 0x2e): entry_ibpb > <2e> DW_AT_external : 1 > <2e> DW_AT_type : <0xc> > <2f> DW_AT_low_pc : 0x0 > <37> DW_AT_high_pc : 19 > <1><38>: Abbrev Number: 0 > > Is it something pahole should handle? > > Thanks, > Martin -- - Arnaldo
