Em Fri, Jan 20, 2023 at 06:40:38PM +0100, Sedat Dilek escreveu:
> Hi Arnaldo,
>
> I use CONFIG_DEBUG_INFO_BTF=y with LLVM-15.
>
> Darkly, I remember I needed some post-v1.24 fixes.
>
> Currently, I use:
>
> $ git describe
> v1.24-26-gb72f5188856d
>
> commit b72f5188856d
> "dwarves: Zero-initialize struct cu in cu__new() to prevent incorrect BTF types"
>
> Any plans to release a pahole version 1.25?
Probably next week, I just have to differentiate a file with split dwarf
to remove a slight hack I have right now.
- Arnaldo
> Thanks.
>
> Best regards,
> -Sedat-
>
> P.S.: I still carry this diff around (attached as diff as Gmail might
> truncate the following lines):
Ok, that is in the same function I have to differentiate if the file
makes reference to another DWARF file (the split dwarf, .dwz thing),
I'll check this patch, thanks!
> $ cd /path/to/pahole.git
>
> $ git diff dwarf_loader.c
> diff --git a/dwarf_loader.c b/dwarf_loader.c
> index 5a74035c5708..96ce5db4f5bc 100644
> --- a/dwarf_loader.c
> +++ b/dwarf_loader.c
> @@ -2808,8 +2808,8 @@ static int __cus__load_debug_types(struct
> conf_load *conf, Dwfl_Module *mod, Dwa
> return 0;
> }
>
> -/* Match the define in linux:include/linux/elfnote.h */
> -#define LINUX_ELFNOTE_BUILD_LTO 0x101
> +/* Match the define in linux:include/linux/elfnote-lto.h */
> +#define LINUX_ELFNOTE_LTO_INFO 0x101
>
> static bool cus__merging_cu(Dwarf *dw, Elf *elf)
> {
> @@ -2827,7 +2827,7 @@ static bool cus__merging_cu(Dwarf *dw, Elf *elf)
> size_t name_off, desc_off, offset = 0;
> GElf_Nhdr hdr;
> while ((offset = gelf_getnote(data, offset,
> &hdr, &name_off, &desc_off)) != 0) {
> - if (hdr.n_type != LINUX_ELFNOTE_BUILD_LTO)
> + if (hdr.n_type != LINUX_ELFNOTE_LTO_INFO)
> continue;
>
> /* owner is Linux */
>
> $ cd /path/to/linux.git
>
> $ git describe
> v6.2-rc4-77-gd368967cb103
>
> $ git grep LINUX_ELFNOTE_LTO_INFO include/linux/elfnote-lto.h
> include/linux/elfnote-lto.h:#define LINUX_ELFNOTE_LTO_INFO 0x101
> include/linux/elfnote-lto.h:#define BUILD_LTO_INFO
> ELFNOTE32("Linux", LINUX_ELFNOTE_LTO_INFO, 1)
> include/linux/elfnote-lto.h:#define BUILD_LTO_INFO
> ELFNOTE32("Linux", LINUX_ELFNOTE_LTO_INFO, 0)
> dileks@iniza:~/src/linux/git$ git describe
> v6.2-rc4-195-gf609936e078d
>
> -EOT-
> diff --git a/dwarf_loader.c b/dwarf_loader.c
> index 5a74035c5708..96ce5db4f5bc 100644
> --- a/dwarf_loader.c
> +++ b/dwarf_loader.c
> @@ -2808,8 +2808,8 @@ static int __cus__load_debug_types(struct conf_load *conf, Dwfl_Module *mod, Dwa
> return 0;
> }
>
> -/* Match the define in linux:include/linux/elfnote.h */
> -#define LINUX_ELFNOTE_BUILD_LTO 0x101
> +/* Match the define in linux:include/linux/elfnote-lto.h */
> +#define LINUX_ELFNOTE_LTO_INFO 0x101
>
> static bool cus__merging_cu(Dwarf *dw, Elf *elf)
> {
> @@ -2827,7 +2827,7 @@ static bool cus__merging_cu(Dwarf *dw, Elf *elf)
> size_t name_off, desc_off, offset = 0;
> GElf_Nhdr hdr;
> while ((offset = gelf_getnote(data, offset, &hdr, &name_off, &desc_off)) != 0) {
> - if (hdr.n_type != LINUX_ELFNOTE_BUILD_LTO)
> + if (hdr.n_type != LINUX_ELFNOTE_LTO_INFO)
> continue;
>
> /* owner is Linux */
--
- Arnaldo
