From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- arch/um/kernel/load_file.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 arch/um/kernel/load_file.c (limited to 'arch/um/kernel/load_file.c') diff --git a/arch/um/kernel/load_file.c b/arch/um/kernel/load_file.c new file mode 100644 index 0000000000..5cecd0e291 --- /dev/null +++ b/arch/um/kernel/load_file.c @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) + */ +#include +#include + +#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; +} -- cgit v1.2.3