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From: Masahiro Yamada <masahiroy@kernel.org>
To: linux-kbuild@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
	Nathan Chancellor <nathan@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Nicolas Pitre <npitre@baylibre.com>,
	Nicolas Schier <nicolas@fjasle.eu>,
	Masahiro Yamada <masahiroy@kernel.org>
Subject: [PATCH v5 06/21] modpost: clean up is_executable_section()
Date: Mon, 15 May 2023 00:27:24 +0900	[thread overview]
Message-ID: <20230514152739.962109-7-masahiroy@kernel.org> (raw)
In-Reply-To: <20230514152739.962109-1-masahiroy@kernel.org>

SHF_EXECINSTR is a bit flag (#define SHF_EXECINSTR 0x4).
Compare the masked flag to '!= 0'.

There is no good reason to stop modpost immediately even if a special
section index is given. You will get a section mismatch error anyway.

Also, change the return type to bool.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---

 scripts/mod/modpost.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index bb7d1d87bae7..0bda2f22c985 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1207,6 +1207,14 @@ static Elf_Sym *find_elf_symbol2(struct elf_info *elf, Elf_Addr addr,
 	return near;
 }
 
+static bool is_executable_section(struct elf_info *elf, unsigned int secndx)
+{
+	if (secndx > elf->num_sections)
+		return false;
+
+	return (elf->sechdrs[secndx].sh_flags & SHF_EXECINSTR) != 0;
+}
+
 static void default_mismatch_handler(const char *modname, struct elf_info *elf,
 				     const struct sectioncheck* const mismatch,
 				     Elf_Rela *r, Elf_Sym *sym, const char *fromsec)
@@ -1252,14 +1260,6 @@ static void default_mismatch_handler(const char *modname, struct elf_info *elf,
 	}
 }
 
-static int is_executable_section(struct elf_info* elf, unsigned int section_index)
-{
-	if (section_index > elf->num_sections)
-		fatal("section_index is outside elf->num_sections!\n");
-
-	return ((elf->sechdrs[section_index].sh_flags & SHF_EXECINSTR) == SHF_EXECINSTR);
-}
-
 static void extable_mismatch_handler(const char* modname, struct elf_info *elf,
 				     const struct sectioncheck* const mismatch,
 				     Elf_Rela* r, Elf_Sym* sym,
-- 
2.39.2


  parent reply	other threads:[~2023-05-14 15:28 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-14 15:27 [PATCH v5 00/21] Unify <linux/export.h> and <asm/export.h>, remove EXPORT_DATA_SYMBOL(), faster TRIM_UNUSED_KSYMS Masahiro Yamada
2023-05-14 15:27 ` [PATCH v5 01/21] modpost: remove broken calculation of exception_table_entry size Masahiro Yamada
2023-05-14 15:27 ` [PATCH v5 02/21] modpost: remove fromsym info in __ex_table section mismatch warning Masahiro Yamada
2023-05-17 18:53   ` Nick Desaulniers
2023-05-20 13:11     ` Masahiro Yamada
2023-05-14 15:27 ` [PATCH v5 03/21] modpost: remove get_prettyname() Masahiro Yamada
2023-05-17 21:44   ` Nick Desaulniers
2023-05-20 13:32     ` Masahiro Yamada
2023-05-14 15:27 ` [PATCH v5 04/21] modpost: squash report_extable_warnings() into extable_mismatch_handler() Masahiro Yamada
2023-05-17 21:27   ` Nick Desaulniers
2023-05-14 15:27 ` [PATCH v5 05/21] modpost: squash report_sec_mismatch() into default_mismatch_handler() Masahiro Yamada
2023-05-17 21:53   ` Nick Desaulniers
2023-05-14 15:27 ` Masahiro Yamada [this message]
2023-05-17 21:10   ` [PATCH v5 06/21] modpost: clean up is_executable_section() Nick Desaulniers
2023-05-20 13:19     ` Masahiro Yamada
2023-05-14 15:27 ` [PATCH v5 07/21] modpost: squash extable_mismatch_handler() into default_mismatch_handler() Masahiro Yamada
2023-05-17 20:55   ` Nick Desaulniers
2023-05-14 15:27 ` [PATCH v5 08/21] modpost: pass 'tosec' down to default_mismatch_handler() Masahiro Yamada
2023-05-17 20:58   ` Nick Desaulniers
2023-05-14 15:27 ` [PATCH v5 09/21] modpost: pass section index to find_elf_symbol2() Masahiro Yamada
2023-05-17 21:05   ` Nick Desaulniers
2023-05-14 15:27 ` [PATCH v5 10/21] modpost: rename find_elf_symbol() and find_elf_symbol2() Masahiro Yamada
2023-05-17 21:14   ` Nick Desaulniers
2023-05-20 13:27     ` Masahiro Yamada
2023-05-22 16:59       ` Nick Desaulniers
2023-05-23 12:04         ` Masahiro Yamada
2023-05-14 15:27 ` [PATCH v5 11/21] modpost: modpost: refactor find_fromsym() and find_tosym() Masahiro Yamada
2023-05-14 15:27 ` [PATCH v5 12/21] modpost: unify 'sym' and 'to' in default_mismatch_handler() Masahiro Yamada
2023-05-14 15:27 ` [PATCH v5 13/21] modpost: replace r->r_offset, r->r_addend with faddr, taddr Masahiro Yamada
2023-05-14 15:27 ` [PATCH v5 14/21] modpost: remove is_shndx_special() check from section_rel(a) Masahiro Yamada
2023-05-17 21:23   ` Nick Desaulniers
2023-05-17 21:24     ` Nick Desaulniers
2023-05-20 13:45     ` Masahiro Yamada
2023-05-14 15:27 ` [PATCH v5 15/21] modpost: pass struct module pointer to check_section_mismatch() Masahiro Yamada
2023-05-14 15:27 ` [PATCH v5 16/21] kbuild: generate KSYMTAB entries by modpost Masahiro Yamada
2023-10-27  4:29   ` Greg Ungerer
2023-10-27  9:56     ` Masahiro Yamada
2023-05-14 15:27 ` [PATCH v5 17/21] ia64,export.h: replace EXPORT_DATA_SYMBOL* with EXPORT_SYMBOL* Masahiro Yamada
2023-05-14 15:27 ` [PATCH v5 18/21] modpost: check static EXPORT_SYMBOL* by modpost again Masahiro Yamada
2023-05-14 15:27 ` [PATCH v5 19/21] modpost: squash sym_update_namespace() into sym_add_exported() Masahiro Yamada
2023-05-14 15:27 ` [PATCH v5 20/21] modpost: use null string instead of NULL pointer for default namespace Masahiro Yamada
2023-05-14 15:27 ` [PATCH v5 21/21] kbuild: implement CONFIG_TRIM_UNUSED_KSYMS without recursion Masahiro Yamada
2023-05-15 21:31   ` Nicolas Pitre
2023-05-15 22:54     ` Sami Tolvanen
2023-05-16  2:16       ` Masahiro Yamada
2023-05-16 14:51         ` Sami Tolvanen
2023-05-16  1:41   ` Masahiro Yamada
2023-05-21 13:15 ` [PATCH v5 00/21] Unify <linux/export.h> and <asm/export.h>, remove EXPORT_DATA_SYMBOL(), faster TRIM_UNUSED_KSYMS Masahiro Yamada

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