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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- */
- #include <linux/memblock.h>
- #include <os.h>
- #include "um_arch.h"
- static int __init __uml_load_file(const char *filename, void *buf, int size)
- {
- int fd, n;
- fd = os_open_file(filename, of_read(OPENFLAGS()), 0);
- if (fd < 0) {
- printk(KERN_ERR "Opening '%s' failed - err = %d\n", filename,
- -fd);
- return -1;
- }
- n = os_read_file(fd, buf, size);
- if (n != size) {
- printk(KERN_ERR "Read of %d bytes from '%s' failed, "
- "err = %d\n", size,
- filename, -n);
- return -1;
- }
- os_close_file(fd);
- return 0;
- }
- void *uml_load_file(const char *filename, unsigned long long *size)
- {
- void *area;
- int err;
- *size = 0;
- if (!filename)
- return NULL;
- err = os_file_size(filename, size);
- if (err)
- return NULL;
- if (*size == 0) {
- printk(KERN_ERR "\"%s\" is empty\n", filename);
- return NULL;
- }
- area = memblock_alloc(*size, SMP_CACHE_BYTES);
- if (!area)
- panic("%s: Failed to allocate %llu bytes\n", __func__, *size);
- if (__uml_load_file(filename, area, *size)) {
- memblock_free(area, *size);
- return NULL;
- }
- return area;
- }
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