[syslinux] [PATCH 18/20] elflink: Don't require every module to have init/exit functions

[Matt Fleming]

From: Matt Fleming <matt.fleming at linux.intel.com>

Don't complain or refuse to load a module if it doesn't contain an
init or exit function, as many of the init/exit functions are in fact
empty.

Signed-off-by: Matt Fleming <matt.fleming at linux.intel.com>
---
 com32/lib/sys/module/elf_module.c |   31 ++++++++++++-------------------
 1 files changed, 12 insertions(+), 19 deletions(-)

diff --git a/com32/lib/sys/module/elf_module.c b/com32/lib/sys/module/elf_module.c
index afb5b64..8db4220 100644
--- a/com32/lib/sys/module/elf_module.c
+++ b/com32/lib/sys/module/elf_module.c
@@ -390,27 +390,20 @@ static int extract_operations(struct elf_module *module) {
 	Elf32_Sym *exit_sym = module_find_symbol(MODULE_ELF_EXIT_PTR, module);
 	Elf32_Sym *main_sym = module_find_symbol("main", module);
 
-	if (init_sym == NULL) {
-		DBG_PRINT("Cannot find initialization routine pointer.\n");
-		printf("Cannot find initialization routine pointer.\n");
-		return -1;
-	}
-	if (exit_sym == NULL) {
-		DBG_PRINT("Cannot find exit routine pointer.\n");
-		printf("Cannot find exit routine pointer.\n");
-		return -1;
-	}
-
-	module->init_func = (module_init_t*)module_get_absolute(
-								init_sym->st_value, module);
-	if (*(module->init_func) == NULL) {
-		module->init_func = NULL;
+	if (init_sym) {
+		module->init_func = (module_init_t*)module_get_absolute(
+			init_sym->st_value, module);
+		if (*(module->init_func) == NULL) {
+			module->init_func = NULL;
+		}
 	}
 
-	module->exit_func = (module_exit_t*)module_get_absolute(
-								exit_sym->st_value, module);
-	if (*(module->exit_func) == NULL) {
-		module->exit_func = NULL;
+	if (exit_sym) {
+		module->exit_func = (module_exit_t*)module_get_absolute(
+			exit_sym->st_value, module);
+		if (*(module->exit_func) == NULL) {
+			module->exit_func = NULL;
+		}
 	}
 
 	if (main_sym)
-- 
1.7.4.2