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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 v4 04/21] modpost: squash report_extable_warnings() into extable_mismatch_handler()
Date: Sun, 14 May 2023 05:44:45 +0900	[thread overview]
Message-ID: <20230513204502.1593923-5-masahiroy@kernel.org> (raw)
In-Reply-To: <20230513204502.1593923-1-masahiroy@kernel.org>

Collect relevant code into one place to clarify all the cases are
covered by 'if () ... else if ... else ...'.

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

 scripts/mod/modpost.c | 40 ++++++++++++++--------------------------
 1 file changed, 14 insertions(+), 26 deletions(-)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 371891d67175..7a9a3ef8ca0d 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1275,40 +1275,19 @@ static int is_executable_section(struct elf_info* elf, unsigned int section_inde
 	return ((elf->sechdrs[section_index].sh_flags & SHF_EXECINSTR) == SHF_EXECINSTR);
 }
 
-static void report_extable_warnings(const char* modname, struct elf_info* elf,
-				    const struct sectioncheck* const mismatch,
-				    Elf_Rela* r, Elf_Sym* sym,
-				    const char* fromsec, const char* tosec)
-{
-	Elf_Sym* tosym = find_elf_symbol(elf, r->r_addend, sym);
-	const char* tosym_name = sym_name(elf, tosym);
-
-	warn("%s(%s+0x%lx): Section mismatch in reference to the %s:%s\n",
-	     modname, fromsec, (long)r->r_offset, tosec, tosym_name);
-
-	if (!match(tosec, mismatch->bad_tosec) &&
-	    is_executable_section(elf, get_secindex(elf, sym)))
-		fprintf(stderr,
-			"The relocation at %s+0x%lx references\n"
-			"section \"%s\" which is not in the list of\n"
-			"authorized sections.  If you're adding a new section\n"
-			"and/or if this reference is valid, add \"%s\" to the\n"
-			"list of authorized sections to jump to on fault.\n"
-			"This can be achieved by adding \"%s\" to \n"
-			"OTHER_TEXT_SECTIONS in scripts/mod/modpost.c.\n",
-			fromsec, (long)r->r_offset, tosec, tosec, tosec);
-}
-
 static void extable_mismatch_handler(const char* modname, struct elf_info *elf,
 				     const struct sectioncheck* const mismatch,
 				     Elf_Rela* r, Elf_Sym* sym,
 				     const char *fromsec)
 {
 	const char* tosec = sec_name(elf, get_secindex(elf, sym));
+	Elf_Sym *tosym = find_elf_symbol(elf, r->r_addend, sym);
+	const char *tosym_name = sym_name(elf, tosym);
 
 	sec_mismatch_count++;
 
-	report_extable_warnings(modname, elf, mismatch, r, sym, fromsec, tosec);
+	warn("%s(%s+0x%lx): Section mismatch in reference to the %s:%s\n",
+	     modname, fromsec, (long)r->r_offset, tosec, tosym_name);
 
 	if (match(tosec, mismatch->bad_tosec))
 		fatal("The relocation at %s+0x%lx references\n"
@@ -1317,7 +1296,16 @@ static void extable_mismatch_handler(const char* modname, struct elf_info *elf,
 		      "You might get more information about where this is\n"
 		      "coming from by using scripts/check_extable.sh %s\n",
 		      fromsec, (long)r->r_offset, tosec, modname);
-	else if (!is_executable_section(elf, get_secindex(elf, sym)))
+	else if (is_executable_section(elf, get_secindex(elf, sym)))
+		warn("The relocation at %s+0x%lx references\n"
+		     "section \"%s\" which is not in the list of\n"
+		     "authorized sections.  If you're adding a new section\n"
+		     "and/or if this reference is valid, add \"%s\" to the\n"
+		     "list of authorized sections to jump to on fault.\n"
+		     "This can be achieved by adding \"%s\" to\n"
+		     "OTHER_TEXT_SECTIONS in scripts/mod/modpost.c.\n",
+		     fromsec, (long)r->r_offset, tosec, tosec, tosec);
+	else
 		error("%s+0x%lx references non-executable section '%s'\n",
 		      fromsec, (long)r->r_offset, tosec);
 }
-- 
2.39.2


  parent reply	other threads:[~2023-05-13 20:45 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-13 20:44 [PATCH v4 00/21] Unify <linux/export.h> and <asm/export.h>, remove EXPORT_DATA_SYMBOL(), faster TRIM_UNUSED_KSYMS Masahiro Yamada
2023-05-13 20:44 ` [PATCH v4 01/21] modpost: remove broken calculation of exception_table_entry size Masahiro Yamada
2023-05-13 20:44 ` [PATCH v4 02/21] modpost: remove fromsym info in __ex_table section mismatch warning Masahiro Yamada
2023-05-13 20:44 ` [PATCH v4 03/21] modpost: remove get_prettyname() Masahiro Yamada
2023-05-13 20:44 ` Masahiro Yamada [this message]
2023-05-13 20:44 ` [PATCH v4 05/21] modpost: squash report_sec_mismatch() into default_mismatch_handler() Masahiro Yamada
2023-05-13 20:44 ` [PATCH v4 06/21] modpost: clean up is_executable_section() Masahiro Yamada
2023-05-13 20:44 ` [PATCH v4 07/21] modpost: squash extable_mismatch_handler() into default_mismatch_handler() Masahiro Yamada
2023-05-13 20:44 ` [PATCH v4 08/21] modpost: pass 'tosec' down to default_mismatch_handler() Masahiro Yamada
2023-05-13 20:44 ` [PATCH v4 09/21] modpost: pass section index to find_elf_symbol2() Masahiro Yamada
2023-05-13 20:44 ` [PATCH v4 10/21] modpost: simplify find_elf_symbol() Masahiro Yamada
2023-05-13 20:44 ` [PATCH v4 11/21] modpost: rename find_elf_symbol() and find_elf_symbol2() Masahiro Yamada
2023-05-13 20:44 ` [PATCH v4 12/21] modpost: unify 'sym' and 'to' in default_mismatch_handler() Masahiro Yamada
2023-05-13 20:44 ` [PATCH v4 13/21] modpost: replace r->r_offset, r->r_addend with faddr, taddr Masahiro Yamada
2023-05-13 20:44 ` [PATCH v4 14/21] modpost: remove is_shndx_special() check from section_rel(a) Masahiro Yamada
2023-05-13 20:44 ` [PATCH v4 15/21] modpost: pass struct module pointer to check_section_mismatch() Masahiro Yamada
2023-05-13 20:44 ` [PATCH v4 16/21] kbuild: generate KSYMTAB entries by modpost Masahiro Yamada
2023-05-13 20:44 ` [PATCH v4 17/21] ia64,export.h: replace EXPORT_DATA_SYMBOL* with EXPORT_SYMBOL* Masahiro Yamada
2023-05-13 20:44 ` [PATCH v4 18/21] modpost: check static EXPORT_SYMBOL* by modpost again Masahiro Yamada
2023-05-13 20:45 ` [PATCH v4 19/21] modpost: squash sym_update_namespace() into sym_add_exported() Masahiro Yamada
2023-05-13 20:45 ` [PATCH v4 20/21] modpost: use null string instead of NULL pointer for default namespace Masahiro Yamada
2023-05-13 20:45 ` [PATCH v4 21/21] kbuild: implement CONFIG_TRIM_UNUSED_KSYMS without recursion Masahiro Yamada
2023-05-14 12:43 ` [PATCH v4 00/21] Unify <linux/export.h> and <asm/export.h>, remove EXPORT_DATA_SYMBOL(), faster TRIM_UNUSED_KSYMS Masahiro Yamada

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