Add method to update btf_type.size for BTF_KIND_DATASEC
size in btf_type of BTF_KIND_DATASEC is 0 at compilation time.
So bpf loader needs to update to actual size based on ELF's section
size.
Bug: 403381101
Test: boot
Change-Id: I78fb26a5b8eeb120044b5737667f472fac51d79f
diff --git a/bpf/loader/NetBpfLoad.cpp b/bpf/loader/NetBpfLoad.cpp
index f8691fd..64ebe0c 100644
--- a/bpf/loader/NetBpfLoad.cpp
+++ b/bpf/loader/NetBpfLoad.cpp
@@ -17,6 +17,7 @@
#define LOG_TAG "NetBpfLoad"
#include <arpa/inet.h>
+#include <bpf/btf.h>
#include <bpf/libbpf.h>
#include <dirent.h>
#include <elf.h>
@@ -649,6 +650,24 @@
return false;
}
+static int setBtfDatasecSize(ifstream &elfFile, struct btf *btf,
+ struct btf_type *bt) {
+ const char *name = btf__name_by_offset(btf, bt->name_off);
+ if (!name) {
+ ALOGE("Couldn't resolve section name, errno: %d", errno);
+ return -errno;
+ }
+
+ vector<char> data;
+ int ret = readSectionByName(name, elfFile, data);
+ if (ret) {
+ ALOGE("Couldn't read section %s, ret: %d", name, ret);
+ return ret;
+ }
+ bt->size = data.size();
+ return 0;
+}
+
static int createMaps(const char* elfPath, ifstream& elfFile, vector<unique_fd>& mapFds,
const char* prefix, const unsigned int bpfloader_ver) {
int ret;