Author: andrew
Date: Mon Jan 15 16:58:07 2018
New Revision: 328007
URL: https://svnweb.freebsd.org/changeset/base/328007

Log:
  Fix booting on some arm64 systems after r327879 by fixing the call to
  utf8_to_ucs2 in boot1.efi. We need to initialise the ucs2 output string
  so it will allocate space, and use the return value to determine if the
  call was successful.
  
  Reviewed by:  imp
  Sponsored by: DARPA, AFRL
  Differential Revision:        https://reviews.freebsd.org/D13915

Modified:
  head/stand/efi/boot1/boot1.c

Modified: head/stand/efi/boot1/boot1.c
==============================================================================
--- head/stand/efi/boot1/boot1.c        Mon Jan 15 16:51:04 2018        
(r328006)
+++ head/stand/efi/boot1/boot1.c        Mon Jan 15 16:58:07 2018        
(r328007)
@@ -89,8 +89,8 @@ efi_getenv(EFI_GUID *g, const char *v, void *data, siz
        UINTN dl;
        EFI_STATUS rv;
 
-       utf8_to_ucs2(v, &uv, &ul);
-       if (uv == NULL)
+       uv = NULL;
+       if (utf8_to_ucs2(v, &uv, &ul) != 0)
                return (EFI_OUT_OF_RESOURCES);
        dl = *len;
        rv = RS->GetVariable(uv, g, &attr, &dl, data);
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