zdump: df_elf: add multiple ELF section helper

Preparation for upcoming patches.

Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

zdump/df_elf.h

@@ -165,6 +165,36 @@ Elf64_Ehdr *read_elf_hdr(const struct zg_fh *fh);
 Elf64_Phdr *read_elf_phdrs(const struct zg_fh *fh, const Elf64_Ehdr *ehdr,
 			   unsigned int *phdr_count);
 
+/*
+ * Read ELF section headers
+ *
+ * To read the section headers the offset of @fh is changed.
+ */
+Elf64_Shdr *read_elf_shdrs(const struct zg_fh *fh, const Elf64_Ehdr *ehdr,
+			   unsigned int *shdr_count);
+
+/*
+ * Read ELF section content
+ *
+ * To read the section content the offset of @fh is changed.
+ */
+unsigned char *read_elf_section_data(const struct zg_fh *fh, const Elf64_Shdr *shdr, size_t *size);
+
+/*
+ * Read ELF section header string table
+ *
+ * To read the section header string table the offset of @fh is changed.
+ */
+char *read_elf_shstrtab(const struct zg_fh *fh, const Elf64_Ehdr *ehdr, const Elf64_Shdr *shdrs,
+			const unsigned int shnum, size_t *shstrtab_size);
+
+/*
+ * Find ELF section header by section name
+ */
+const Elf64_Shdr *find_elf_shdr_by_name(const Elf64_Shdr *shdrs, const unsigned int shnum,
+					const char *shstrtab, const size_t shstrtab_size,
+					const char *name);
+
 /*
  * Read note and store the note description in @buf
  */