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[efi] Create a copy of the system flattened device tree, if present

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EFI configuration tables may be freed at any time, and there is no way
to be notified when the table becomes invalidated.  Create a copy of
the system flattened device tree (if present), so that we do not risk
being left with an invalid pointer.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2025-03-28 14:10:55 +00:00
parent 3860313dd5
commit 666929e311
3 changed files with 15 additions and 5 deletions
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6
src/include/ipxe/fdt.h
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@@ -78,9 +78,9 @@ struct fdt {
/** Tree data */
union {
/** Tree header */
const struct fdt_header *hdr;
struct fdt_header *hdr;
/** Raw data */
const void *raw;
void *raw;
};
/** Length of tree */
size_t len;
@@ -107,7 +107,7 @@ extern int fdt_u64 ( struct fdt *fdt, unsigned int offset, const char *name,
uint64_t *value );
extern int fdt_mac ( struct fdt *fdt, unsigned int offset,
struct net_device *netdev );
extern int fdt_parse ( struct fdt *fdt, const struct fdt_header *hdr,
extern int fdt_parse ( struct fdt *fdt, struct fdt_header *hdr,
size_t max_len );
#endif /* _IPXE_FDT_H */