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[efi] Print raw device path when we have no DevicePathToTextProtocol 

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/20/merge
Michael Brown 2014-08-01 10:51:15 +01:00
parent 102008f648
commit c77859931d
1 changed files with 18 additions and 4 deletions
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22
src/interface/efi/efi_debug.c
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@ -30,6 +30,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <string.h>
#include <errno.h>
#include <ipxe/uuid.h>
#include <ipxe/base16.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/efi_driver.h>
#include <ipxe/efi/Protocol/BlockIo.h>
@ -316,18 +317,31 @@ void dbg_efi_protocols ( EFI_HANDLE handle ) {
const char * efi_devpath_text ( EFI_DEVICE_PATH_PROTOCOL *path ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
static char text[256];
void *start;
void *end;
size_t max_len;
size_t len;
CHAR16 *wtext;
/* Sanity checks */
if ( ! efidpt ) {
DBG ( "[No DevicePathToText]" );
return NULL;
}
if ( ! path ) {
DBG ( "[NULL DevicePath]" );
return NULL;
}
/* If we have no DevicePathToText protocol then use a raw hex string */
if ( ! efidpt ) {
DBG ( "[No DevicePathToText]" );
start = path;
end = efi_devpath_end ( path );
len = ( end - start );
max_len = ( ( sizeof ( text ) - 1 /* NUL */ ) / 2 /* "xx" */ );
if ( len > max_len )
len = max_len;
base16_encode ( start, len, text );
return text;
}
/* Convert path to a textual representation */
wtext = efidpt->ConvertDevicePathToText ( path, TRUE, FALSE );
if ( ! wtext )