From 5d27afaf31ac124edfef09862d26247b2c12b6a1 Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Tue, 4 Oct 2022 18:09:33 -0300
Subject: [PATCH 1/7] pahole: Support '--lang/--lang_exclude=asm'
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It is disjoint from the other languages and then the first simple
implementation of language inclusion/exclusion didn't support it, add
an special case to test against 0x8001 (DW_LANG_Mips_Assembler) to cover
that.
This is needed as recently compilers started to add DWARF constructs to
represent asm CUs that broke pahole as it didn't support
DW_TAG_unspecified_type as a "type", so add it in case in the future we
want to exclude such CUs.
The DW_TAG_unspecified_type tag is going to be supported in the next
csets tho.
We also may want this to exclude new tags that aren't supported in BTF,
etc.
Cc: Martin Liška <mliska@suse.cz>
Cc: Nick Clifton <nickc@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
dwarves.c | 3 +++
man-pages/pahole.1 | 2 +-
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/dwarves.c b/dwarves.c
index db1dcf5904bc98fe..32bfec5ea0f1a338 100644
--- a/dwarves.c
+++ b/dwarves.c
@@ -2127,6 +2127,9 @@ int lang__str2int(const char *lang)
[DW_LANG_UPC] = "upc",
};
+ if (strcasecmp(lang, "asm") == 0)
+ return DW_LANG_Mips_Assembler;
+
// c89 is the first, bliss is the last, see /usr/include/dwarf.h
for (int id = DW_LANG_C89; id <= DW_LANG_BLISS; ++id)
if (languages[id] && strcasecmp(lang, languages[id]) == 0)
diff --git a/man-pages/pahole.1 b/man-pages/pahole.1
index bb88e2f5f55a2ee9..f60713a7118d9b63 100644
--- a/man-pages/pahole.1
+++ b/man-pages/pahole.1
@@ -378,7 +378,7 @@ Only process compilation units built from source code written in the specified l
Supported languages:
- ada83, ada95, bliss, c, c89, c99, c11, c++, c++03, c++11, c++14, cobol74,
+ ada83, ada95, asm, bliss, c, c89, c99, c11, c++, c++03, c++11, c++14, cobol74,
cobol85, d, dylan, fortran77, fortran90, fortran95, fortran03, fortran08,
go, haskell, java, julia, modula2, modula3, objc, objc++, ocaml, opencl,
pascal83, pli, python, renderscript, rust, swift, upc
--
2.39.1