Fix relocation type.

Clang produces ELF code with relocation type 10 or 1, but ubpf expects relocation type 2. For more info, see: iovisor#20 Signed-off-by: Martin Ichilevici de Oliveira <martin.i.oliveira@gmail.com>
iomartin · Jul 5, 2019 · af4a54c · af4a54c
1 parent 507ddae
commit af4a54c
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/vm/ubpf_loader.c b/vm/ubpf_loader.c
@@ -182,11 +182,15 @@ ubpf_load_elf(struct ubpf_vm *vm, const void *elf, size_t elf_size, char **errms
         for (j = 0; j < rel->size/sizeof(Elf64_Rel); j++) {
             const Elf64_Rel *r = &rs[j];
 
-            if (ELF64_R_TYPE(r->r_info) != 2) {
+            if (ELF64_R_TYPE(r->r_info) == 1)
+                continue;
+
+            if (ELF64_R_TYPE(r->r_info) != 10) {
                 *errmsg = ubpf_error("bad relocation type %u", ELF64_R_TYPE(r->r_info));
                 goto error;
             }
 
+
             uint32_t sym_idx = ELF64_R_SYM(r->r_info);
             if (sym_idx >= num_syms) {
                 *errmsg = ubpf_error("bad symbol index");