diff --git a/nemu/src/utils/elf-parser.c b/nemu/src/utils/elf-parser.c
index 8ea582b..25be7fc 100644
--- a/nemu/src/utils/elf-parser.c
+++ b/nemu/src/utils/elf-parser.c
@@ -12,9 +12,9 @@ void init_elf(const char *path) {
   FILE *elf_file = fopen(path, "rb");
   Elf32_Ehdr header;
   Elf32_Shdr section_header, *psh;
-  FAILED_GOTO(failed_nosym, fread(&header, sizeof(Elf32_Ehdr), 1, elf_file) > 0);
+  FAILED_GOTO(failed_nosym, fread(&header, sizeof(Elf32_Ehdr), 1, elf_file) <= 0);
   FAILED_GOTO(failed_nosym, fseek(elf_file, header.e_shoff, SEEK_SET) != 0);
-  FAILED_GOTO(failed_nosym, fread(&section_header, header.e_shentsize, header.e_shnum, elf_file) > 0);
+  FAILED_GOTO(failed_nosym, fread(&section_header, header.e_shentsize, header.e_shnum, elf_file) <= 0);
 
   Elf32_Shdr *symtab = NULL, *strtab = NULL;
   for(int i = 0; i < header.e_shnum; i++) {
@@ -30,13 +30,13 @@ void init_elf(const char *path) {
   int sym_length = symtab->sh_entsize / sizeof(Elf32_Sym);
   Elf32_Sym *sym = calloc(sym_length, sizeof(Elf32_Sym));
   FAILED_GOTO(failed, fseek(elf_file, symtab->sh_offset, SEEK_SET) != 0);
-  FAILED_GOTO(failed, fread(&sym, sizeof(Elf32_Sym), sym_length, elf_file) > 0);
+  FAILED_GOTO(failed, fread(&sym, sizeof(Elf32_Sym), sym_length, elf_file) <= 0);
   for(int j = 0; j < sym_length; j++) {
     if(ELF32_ST_TYPE(sym[j].st_info) != STT_FUNC) continue;
     // Only read function type symbol
     char func[30] = "";
     FAILED_GOTO(failed, fseek(elf_file, sym[j].st_name + strtab->sh_offset, SEEK_SET) != 0);
-    FAILED_GOTO(failed, fgets(func, 30, elf_file) > 0);
+    FAILED_GOTO(failed, fgets(func, 30, elf_file) <= 0);
     puts(func);
   }
   return;