[Xen-devel] [livepatch-build-tools part2 3/6] create-diff-object: Add is_special_section() helper function

[Pawel Wieczorkiewicz <wipawel@xxxxxxxxx>]

This function determines, based on the given section name, if the
sections belongs to the special sections category.
It treats a name from the special_sections array as a prefix. Any
sections whose name starts with special section prefix is considered
a special section.

Signed-off-by: Pawel Wieczorkiewicz <wipawel@xxxxxxxxx>
Reviewed-by: Andra-Irina Paraschiv <andraprs@xxxxxxxxxx>
Reviewed-by: Bjoern Doebel <doebel@xxxxxxxxx>
Reviewed-by: Norbert Manthey <nmanthey@xxxxxxxxx>
---
 common.c | 23 +++++++++++++++++++++++
 common.h |  1 +
 2 files changed, 24 insertions(+)

diff --git a/common.c b/common.c
index c968299..a2c860b 100644
--- a/common.c
+++ b/common.c
@@ -290,6 +290,29 @@ int is_referenced_section(const struct section *sec, const 
struct kpatch_elf *ke
        return false;
 }
 
+int is_special_section(struct section *sec)
+{
+       static struct special_section_names {
+               const char *name;
+       } names[] = {
+               { .name         = ".bug_frames"                 },
+               { .name         = ".fixup"                      },
+               { .name         = ".ex_table"                   },
+               { .name         = ".altinstructions"            },
+               { .name         = ".altinstr_replacement"       },
+               { .name         = ".livepatch.hooks"            },
+               { .name         = NULL                          },
+       };
+       struct special_section_names *special;
+
+       for (special = names; special->name; special++) {
+               if (!strncmp(sec->name, special->name, strlen(special->name)))
+                       return true;
+       }
+
+       return false;
+}
+
 /* returns the offset of the string in the string table */
 int offset_of_string(struct list_head *list, char *name)
 {
diff --git a/common.h b/common.h
index affe16b..6d38e88 100644
--- a/common.h
+++ b/common.h
@@ -152,6 +152,7 @@ int is_debug_section(struct section *sec);
 int is_rela_section(struct section *sec);
 int is_standard_section(struct section *sec);
 int is_referenced_section(const struct section *sec, const struct kpatch_elf 
*kelf);
+int is_special_section(struct section *sec);
 int is_local_sym(struct symbol *sym);
 
 void rela_insn(struct section *sec, struct rela *rela, struct insn *insn);
-- 
2.16.5




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