[SECURITY PATCH 112/117] kern/misc: Split parse_printf_args() into format parsing and va_list handling

[Daniel Kiper]

From: Thomas Frauendorfer | Miray Software <tf@miray.de>

This patch is preparing for a follow up patch which will use
the format parsing part to compare the arguments in a printf()
format from an external source against a printf() format with
expected arguments.

Signed-off-by: Thomas Frauendorfer | Miray Software <tf@miray.de>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
 grub-core/kern/misc.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/grub-core/kern/misc.c b/grub-core/kern/misc.c
index 430e72340..c58857ca2 100644
--- a/grub-core/kern/misc.c
+++ b/grub-core/kern/misc.c
@@ -645,8 +645,7 @@ grub_lltoa (char *str, int c, unsigned long long n)
 }
 
 static void
-parse_printf_args (const char *fmt0, struct printf_args *args,
-                  va_list args_in)
+parse_printf_arg_fmt (const char *fmt0, struct printf_args *args)
 {
   const char *fmt;
   char c;
@@ -804,6 +803,14 @@ parse_printf_args (const char *fmt0, struct printf_args 
*args,
          break;
        }
     }
+}
+
+static void
+parse_printf_args (const char *fmt0, struct printf_args *args, va_list args_in)
+{
+  grub_size_t n;
+
+  parse_printf_arg_fmt (fmt0, args);
 
   for (n = 0; n < args->count; n++)
     switch (args->ptr[n].type)
-- 
2.11.0