mirror of
https://github.com/riscv-software-src/opensbi
synced 2025-11-04 05:50:22 +00:00
eb90e0a16c
Sync with libfdt v1.6.1 release source codes. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
94 lines
1.8 KiB
C
94 lines
1.8 KiB
C
// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
|
|
/*
|
|
* libfdt - Flat Device Tree manipulation
|
|
* Copyright (C) 2006 David Gibson, IBM Corporation.
|
|
*/
|
|
#include "libfdt_env.h"
|
|
|
|
#include <fdt.h>
|
|
#include <libfdt.h>
|
|
|
|
#include "libfdt_internal.h"
|
|
|
|
int fdt_check_full(const void *fdt, size_t bufsize)
|
|
{
|
|
int err;
|
|
int num_memrsv;
|
|
int offset, nextoffset = 0;
|
|
uint32_t tag;
|
|
unsigned int depth = 0;
|
|
const void *prop;
|
|
const char *propname;
|
|
bool expect_end = false;
|
|
|
|
if (bufsize < FDT_V1_SIZE)
|
|
return -FDT_ERR_TRUNCATED;
|
|
if (bufsize < fdt_header_size(fdt))
|
|
return -FDT_ERR_TRUNCATED;
|
|
err = fdt_check_header(fdt);
|
|
if (err != 0)
|
|
return err;
|
|
if (bufsize < fdt_totalsize(fdt))
|
|
return -FDT_ERR_TRUNCATED;
|
|
|
|
num_memrsv = fdt_num_mem_rsv(fdt);
|
|
if (num_memrsv < 0)
|
|
return num_memrsv;
|
|
|
|
while (1) {
|
|
offset = nextoffset;
|
|
tag = fdt_next_tag(fdt, offset, &nextoffset);
|
|
|
|
if (nextoffset < 0)
|
|
return nextoffset;
|
|
|
|
/* If we see two root nodes, something is wrong */
|
|
if (expect_end && tag != FDT_END)
|
|
return -FDT_ERR_BADSTRUCTURE;
|
|
|
|
switch (tag) {
|
|
case FDT_NOP:
|
|
break;
|
|
|
|
case FDT_END:
|
|
if (depth != 0)
|
|
return -FDT_ERR_BADSTRUCTURE;
|
|
return 0;
|
|
|
|
case FDT_BEGIN_NODE:
|
|
depth++;
|
|
if (depth > INT_MAX)
|
|
return -FDT_ERR_BADSTRUCTURE;
|
|
|
|
/* The root node must have an empty name */
|
|
if (depth == 1) {
|
|
const char *name;
|
|
int len;
|
|
|
|
name = fdt_get_name(fdt, offset, &len);
|
|
if (*name || len)
|
|
return -FDT_ERR_BADSTRUCTURE;
|
|
}
|
|
break;
|
|
|
|
case FDT_END_NODE:
|
|
if (depth == 0)
|
|
return -FDT_ERR_BADSTRUCTURE;
|
|
depth--;
|
|
if (depth == 0)
|
|
expect_end = true;
|
|
break;
|
|
|
|
case FDT_PROP:
|
|
prop = fdt_getprop_by_offset(fdt, offset, &propname,
|
|
&err);
|
|
if (!prop)
|
|
return err;
|
|
break;
|
|
|
|
default:
|
|
return -FDT_ERR_INTERNAL;
|
|
}
|
|
}
|
|
}
|