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+/*
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+ * Copyright (C) 2014 Michael Brown <mbrown@fensystems.co.uk>.
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License as
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+ * published by the Free Software Foundation; either version 2 of the
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+ * License, or any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful, but
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+ * WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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+ * 02110-1301, USA.
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+ */
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+
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+#include <stdint.h>
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+#include <stddef.h>
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+#include <stdlib.h>
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+#include <stdio.h>
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+#include <string.h>
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+#include <sys/stat.h>
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+#include <unistd.h>
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+#include <errno.h>
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+#include <assert.h>
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+#include <getopt.h>
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+#include <ipxe/efi/efi.h>
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+#include <ipxe/efi/IndustryStandard/PeImage.h>
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+
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+#define eprintf(...) fprintf ( stderr, __VA_ARGS__ )
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+
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+/** Command-line options */
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+struct options {
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+};
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+
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+/** EFI fat binary file header */
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+struct efifatbin_file_header {
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+ /** Signature */
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+ uint32_t signature;
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+ /** Count */
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+ uint32_t count;
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+} __attribute__ (( packed ));
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+
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+/** EFI fat binary signature */
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+#define EFIFATBIN_SIGNATURE 0x0ef1fab9
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+
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+/** EFI fat binary image header */
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+struct efifatbin_image_header {
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+ /** Flags */
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+ uint64_t flags;
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+ /** Offset */
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+ uint32_t offset;
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+ /** Length */
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+ uint32_t len;
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+ /** Padding */
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+ uint32_t pad;
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+} __attribute__ (( packed ));
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+
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+/** EFI fat binary default flags */
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+#define EFIFATBIN_FLAGS 0x0000000300000007ULL
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+
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+/** EFI fat binary 64-bit flag */
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+#define EFIFATBIN_64BIT 0x0000000001000000ULL
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+
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+/**
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+ * Allocate memory
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+ *
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+ * @v len Length of memory to allocate
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+ * @ret ptr Pointer to allocated memory
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+ */
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+static void * xmalloc ( size_t len ) {
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+ void *ptr;
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+
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+ ptr = malloc ( len );
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+ if ( ! ptr ) {
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+ eprintf ( "Could not allocate %zd bytes\n", len );
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+ exit ( 1 );
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+ }
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+
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+ return ptr;
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+}
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+
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+/**
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+ * Generate EFI fat binary
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+ *
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+ * @v count Number of input files
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+ * @v infile_names Input filenames
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+ * @v outfile_name Output filename
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+ */
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+static void make_efifatbin ( unsigned int count, char **infile_names,
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+ const char *outfile_name ) {
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+ FILE *infile[count];
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+ FILE *outfile;
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+ struct stat stat[count];
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+ void *buf[count];
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+ struct efifatbin_file_header file_header;
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+ struct efifatbin_image_header header[count];
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+ size_t offset;
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+ EFI_IMAGE_DOS_HEADER *dos;
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+ union {
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+ EFI_IMAGE_NT_HEADERS32 nt32;
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+ EFI_IMAGE_NT_HEADERS64 nt64;
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+ } *nt;
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+ unsigned int i;
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+
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+ /* Generate file header */
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+ file_header.signature = EFIFATBIN_SIGNATURE;
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+ file_header.count = count;
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+ offset = ( sizeof ( file_header ) + sizeof ( header ) );
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+
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+ /* Process input files */
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+ for ( i = 0 ; i < count ; i++ ) {
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+
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+ /* Open input file */
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+ infile[i] = fopen ( infile_names[i], "r" );
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+ if ( ! infile[i] ) {
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+ eprintf ( "Could not open %s for reading: %s\n",
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+ infile_names[i], strerror ( errno ) );
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+ exit ( 1 );
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+ }
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+
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+ /* Determine PE file size */
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+ if ( fstat ( fileno ( infile[i] ), &stat[i] ) != 0 ) {
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+ eprintf ( "Could not stat %s: %s\n",
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+ infile_names[i], strerror ( errno ) );
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+ exit ( 1 );
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+ }
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+
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+ /* Allocate buffer and read in PE file */
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+ buf[i] = xmalloc ( stat[i].st_size );
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+ if ( fread ( buf[i], stat[i].st_size, 1, infile[i] ) != 1 ) {
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+ eprintf ( "Could not read %s: %s\n",
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+ infile_names[i], strerror ( errno ) );
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+ exit ( 1 );
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+ }
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+
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+ /* Close input file */
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+ fclose ( infile[i] );
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+
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+ /* Generate image header */
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+ header[i].flags = EFIFATBIN_FLAGS;
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+ header[i].offset = offset;
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+ header[i].len = stat[i].st_size;
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+ header[i].pad = 0;
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+
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+ /* Determine architecture */
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+ dos = buf[i];
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+ nt = ( buf[i] + dos->e_lfanew );
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+ if ( nt->nt32.FileHeader.Machine == EFI_IMAGE_MACHINE_X64 )
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+ header[i].flags |= EFIFATBIN_64BIT;
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+
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+ /* Allow space for this image */
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+ offset += stat[i].st_size;
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+ }
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+
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+ /* Open output file */
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+ outfile = fopen ( outfile_name, "w" );
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+ if ( ! outfile ) {
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+ eprintf ( "Could not open %s for writing: %s\n",
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+ outfile_name, strerror ( errno ) );
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+ exit ( 1 );
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+ }
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+
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+ /* Write fat binary header */
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+ if ( fwrite ( &file_header, sizeof ( file_header ), 1, outfile ) != 1 ){
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+ eprintf ( "Could not write %s: %s\n",
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+ outfile_name, strerror ( errno ) );
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+ exit ( 1 );
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+ }
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+ for ( i = 0 ; i < count ; i++ ) {
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+ if ( fwrite ( &header[i], sizeof ( header[i] ), 1,
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+ outfile ) != 1 ) {
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+ eprintf ( "Could not write %s: %s\n",
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+ outfile_name, strerror ( errno ) );
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+ exit ( 1 );
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+ }
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+ }
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+
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+ /* Write images */
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+ for ( i = 0 ; i < count ; i++ ) {
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+ if ( fwrite ( buf[i], stat[i].st_size, 1, outfile ) != 1 ) {
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+ eprintf ( "Could not write %s: %s\n",
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+ outfile_name, strerror ( errno ) );
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+ exit ( 1 );
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+ }
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+ }
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+
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+ /* Close output file */
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+ fclose ( outfile );
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+}
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+
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+/**
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+ * Print help
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+ *
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+ * @v program_name Program name
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+ */
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+static void print_help ( const char *program_name ) {
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+ eprintf ( "Syntax: %s infile [infile...] outfile\n", program_name );
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+}
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+
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+/**
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+ * Parse command-line options
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+ *
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+ * @v argc Argument count
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+ * @v argv Argument list
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+ * @v opts Options structure to populate
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+ */
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+static int parse_options ( const int argc, char **argv,
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+ struct options *opts __attribute__ (( unused )) ) {
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+ int c;
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+
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+ while (1) {
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+ int option_index = 0;
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+ static struct option long_options[] = {
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+ { "help", 0, NULL, 'h' },
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+ { 0, 0, 0, 0 }
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+ };
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+
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+ if ( ( c = getopt_long ( argc, argv, "h",
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+ long_options,
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+ &option_index ) ) == -1 ) {
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+ break;
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+ }
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+
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+ switch ( c ) {
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+ case 'h':
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+ print_help ( argv[0] );
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+ exit ( 0 );
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+ case '?':
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+ default:
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+ exit ( 2 );
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+ }
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+ }
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+ return optind;
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+}
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+
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+int main ( int argc, char **argv ) {
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+ struct options opts;
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+ int infile_index;
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+ int outfile_index;
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+ int count;
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+
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+ /* Parse command-line arguments */
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+ memset ( &opts, 0, sizeof ( opts ) );
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+ infile_index = parse_options ( argc, argv, &opts );
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+ outfile_index = ( argc - 1 );
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+ count = ( outfile_index - infile_index );
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+ if ( count <= 0 ) {
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+ print_help ( argv[0] );
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+ exit ( 2 );
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+ }
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+
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+ /* Generate fat binary */
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+ make_efifatbin ( count, &argv[infile_index], argv[outfile_index] );
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+
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+ return 0;
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+}
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