On 1/20/23 9:40 AM, Sedat Dilek wrote:
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?
Thanks.
Best regards,
-Sedat-
P.S.: I still carry this diff around (attached as diff as Gmail might
truncate the following lines):
$ 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 */
Ya, LINUX_ELFNOTE_BUILD_LTO is initially proposed macro name but later
the formal kernel patch used LINUX_ELFNOTE_LTO_INFO. Could you submit
a pahole for this so it is consistent with kernel? Thanks!
$ 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-
