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76 lines
1.4 KiB
76 lines
1.4 KiB
// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) |
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/* |
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* libfdt - Flat Device Tree manipulation |
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* Copyright (C) 2006 David Gibson, IBM Corporation. |
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*/ |
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#include "libfdt_env.h" |
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#include <fdt.h> |
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#include <libfdt.h> |
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#include "libfdt_internal.h" |
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int fdt_check_full(const void *fdt, size_t bufsize) |
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{ |
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int err; |
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int num_memrsv; |
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int offset, nextoffset = 0; |
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uint32_t tag; |
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unsigned int depth = 0; |
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const void *prop; |
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const char *propname; |
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if (bufsize < FDT_V1_SIZE) |
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return -FDT_ERR_TRUNCATED; |
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if (bufsize < fdt_header_size(fdt)) |
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return -FDT_ERR_TRUNCATED; |
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err = fdt_check_header(fdt); |
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if (err != 0) |
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return err; |
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if (bufsize < fdt_totalsize(fdt)) |
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return -FDT_ERR_TRUNCATED; |
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num_memrsv = fdt_num_mem_rsv(fdt); |
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if (num_memrsv < 0) |
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return num_memrsv; |
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while (1) { |
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offset = nextoffset; |
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tag = fdt_next_tag(fdt, offset, &nextoffset); |
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if (nextoffset < 0) |
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return nextoffset; |
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switch (tag) { |
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case FDT_NOP: |
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break; |
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case FDT_END: |
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if (depth != 0) |
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return -FDT_ERR_BADSTRUCTURE; |
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return 0; |
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case FDT_BEGIN_NODE: |
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depth++; |
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if (depth > INT_MAX) |
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return -FDT_ERR_BADSTRUCTURE; |
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break; |
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case FDT_END_NODE: |
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if (depth == 0) |
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return -FDT_ERR_BADSTRUCTURE; |
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depth--; |
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break; |
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case FDT_PROP: |
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prop = fdt_getprop_by_offset(fdt, offset, &propname, |
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&err); |
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if (!prop) |
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return err; |
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break; |
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default: |
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return -FDT_ERR_INTERNAL; |
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} |
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} |
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}
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