[src/trunk]: src/sys/arch/i386/stand/efiboot efiboot: fix efivar command.

[nonaka <nonaka%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3314c3604d64
branches:  trunk
changeset: 351887:3314c3604d64
user:      nonaka <nonaka%NetBSD.org@localhost>
date:      Fri Mar 03 09:29:57 2017 +0000

description:
efiboot: fix efivar command.

diffstat:

 sys/arch/i386/stand/efiboot/boot.c |  10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diffs (44 lines):

diff -r 271f8f7f03f6 -r 3314c3604d64 sys/arch/i386/stand/efiboot/boot.c
--- a/sys/arch/i386/stand/efiboot/boot.c        Fri Mar 03 07:57:49 2017 +0000
+++ b/sys/arch/i386/stand/efiboot/boot.c        Fri Mar 03 09:29:57 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: boot.c,v 1.2 2017/02/03 16:42:26 roy Exp $     */
+/*     $NetBSD: boot.c,v 1.3 2017/03/03 09:29:57 nonaka Exp $  */
 
 /*-
  * Copyright (c) 2016 Kimihiro Nonaka <nonaka%netbsd.org@localhost>
@@ -557,7 +557,7 @@
         L"GUID                                Variable Name        Value\n"
         L"=================================== ==================== ========\n";
        EFI_STATUS status;
-       UINTN sz = 64;
+       UINTN sz = 64, osz;
        CHAR16 *name = NULL, *tmp, *val;
        EFI_GUID vendor;
        UINTN cols, rows, row = 0;
@@ -576,11 +576,12 @@
                return;
        }
 
-       name[0] = 0;
+       SetMem(name, sz, 0);
        vendor = NullGuid;
 
        Print(L"%s", header);
        for (;;) {
+               osz = sz;
                status = uefi_call_wrapper(RT->GetNextVariableName, 3,
                    &sz, name, &vendor);
                if (EFI_ERROR(status)) {
@@ -598,8 +599,11 @@
                                    (UINT64)sz);
                                break;
                        }
+                       SetMem(tmp, sz, 0);
+                       CopyMem(tmp, name, osz);
                        FreePool(name);
                        name = tmp;
+                       continue;
                }
 
                val = LibGetVariable(name, &vendor);