[pxe] Initialize EDX on PXE NBP entry and INT 1Ah

[people/cooldavid/gpxe.git] / src / arch / i386 / interface / pxe / pxe_call.c

diff --git a/src/arch/i386/interface/pxe/pxe_call.c b/src/arch/i386/interface/pxe/pxe_call.c
index 04aaf3b..320ae12 100644 (file)
--- a/src/arch/i386/interface/pxe/pxe_call.c
+++ b/src/arch/i386/interface/pxe/pxe_call.c
@@ -433,7 +433,7 @@ void pxe_init_structures ( void ) {
  * @ret rc             Return status code
  */
 int pxe_start_nbp ( void ) {
-       int discard_b, discard_c;
+       int discard_b, discard_c, discard_d;
        uint16_t rc;
 
        /* Far call to PXE NBP */
@@ -444,11 +444,12 @@ int pxe_start_nbp ( void ) {
                                           "lcall $0, $0x7c00\n\t"
                                           "addw $4, %%sp\n\t" )
                               : "=a" ( rc ), "=b" ( discard_b ),
-                                "=c" ( discard_c )
-                              :  "a" ( __from_text16 ( &ppxe ) ),
-                                 "b" ( __from_text16 ( &pxenv ) ),
-                                 "c" ( rm_cs )
-                              : "edx", "esi", "edi", "ebp", "memory" );
+                                "=c" ( discard_c ), "=d" ( discard_d )
+                              : "a" ( __from_text16 ( &ppxe ) ),
+                                "b" ( __from_text16 ( &pxenv ) ),
+                                "c" ( rm_cs ),
+                                "d" ( virt_to_phys ( &pxenv ) )
+                              : "esi", "edi", "ebp", "memory" );
 
        return rc;
 }