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[efi] Add efi_strerror()
EFI_STATUS is defined as an INTN, which maps to UINT32 (i.e. unsigned int) on i386 and UINT64 (i.e. unsigned long) on x86_64. This would require a cast each time the error status is printed. Add efi_strerror() to avoid this ickiness and simultaneously enable prettier reporting of EFI status codes.
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Michael Brown
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Nov 19, 2008
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/* | ||
* Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>. | ||
* | ||
* This program is free software; you can redistribute it and/or | ||
* modify it under the terms of the GNU General Public License as | ||
* published by the Free Software Foundation; either version 2 of the | ||
* License, or any later version. | ||
* | ||
* This program is distributed in the hope that it will be useful, but | ||
* WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
* General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with this program; if not, write to the Free Software | ||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
*/ | ||
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#include <stdio.h> | ||
#include <gpxe/efi/efi.h> | ||
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/** @file | ||
* | ||
* gPXE error message formatting for EFI | ||
* | ||
*/ | ||
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/** | ||
* Format EFI status code | ||
* | ||
* @v efirc EFI status code | ||
* @v efi_strerror EFI status code string | ||
*/ | ||
const char * efi_strerror ( EFI_STATUS efirc ) { | ||
static char errbuf[32]; | ||
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if ( ! efirc ) | ||
return "No error"; | ||
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snprintf ( errbuf, sizeof ( errbuf ), "Error %lld", | ||
( unsigned long long ) ( efirc ^ MAX_BIT ) ); | ||
return errbuf; | ||
} |
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