linux-kernel - [PATCH 4/7] s390/module: Provide find

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Message-ID: <20240913130544.2398678-5-hca@linux.ibm.com>
Date: Fri, 13 Sep 2024 15:05:40 +0200
From: Heiko Carstens <hca@...ux.ibm.com>
To: "Jason A . Donenfeld" <Jason@...c4.com>
Cc: Alexander Gordeev <agordeev@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Harald Freudenberger <freude@...ux.ibm.com>,
        Stefan Liebler <stli@...ux.ibm.com>, linux-kernel@...r.kernel.org,
        linux-crypto@...r.kernel.org, linux-s390@...r.kernel.org
Subject: [PATCH 4/7] s390/module: Provide find_section() helper

Provide find_section() helper function which can be used to find a
section by name, similar to other architectures.

Signed-off-by: Heiko Carstens <hca@...ux.ibm.com>
---
 arch/s390/include/asm/module.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/s390/include/asm/module.h b/arch/s390/include/asm/module.h
index 9f1eea15872c..916ab59e458a 100644
--- a/arch/s390/include/asm/module.h
+++ b/arch/s390/include/asm/module.h
@@ -38,4 +38,18 @@ struct mod_arch_specific {
 #endif /* CONFIG_FUNCTION_TRACER */
 };
 
+static inline const Elf_Shdr *find_section(const Elf_Ehdr *hdr,
+					   const Elf_Shdr *sechdrs,
+					   const char *name)
+{
+	const char *secstrs = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
+	const Elf_Shdr *s, *se;
+
+	for (s = sechdrs, se = sechdrs + hdr->e_shnum; s < se; s++) {
+		if (strcmp(name, secstrs + s->sh_name) == 0)
+			return s;
+	}
+	return NULL;
+}
+
 #endif /* _ASM_S390_MODULE_H */
-- 
2.43.0