Given a set of nodes and properties, find the regions of the device tree
which describe those parts.
Tests will come as part of fdtgrep.
Signed-off-by: Simon Glass <sjg@xxxxxxxxxxxx>
---
Changes in v4:
- Chop back to the minimal useful functionality
Changes in v3:
- Add a feature to include all subnodes
Changes in v2:
- Add long comment explaining theory of operation
- Add more comments about the -1 return value from h_include
- Add new FDT_ERR_TOODEEP error type and use it
- Add note that changes in node/property order can cause false hash misses
- Change returned error from BADLAYOUT to BADSTRUCTURE
- Drop FDT_IS_COMPAT and pass node offset to h_include function
- Drop stale comment about names / wildcards
- Fix info->count <= info->max_regions in fdt_add_region() merge case
- Move region code to separate fdt_region.c file
- Move to a model with fdt_first_region()/fdt_next_region()
- Return FDT_ERR_BADLAYOUT error if strings block is before structure block
libfdt/Makefile.libfdt | 2 +-
libfdt/fdt_region.c | 369 +++++++++++++++++++++++++++++++++++++++++
libfdt/libfdt.h | 223 ++++++++++++++++++++++++-
libfdt/meson.build | 1 +
libfdt/version.lds | 2 +
5 files changed, 595 insertions(+), 2 deletions(-)
create mode 100644 libfdt/fdt_region.c
diff --git a/libfdt/Makefile.libfdt b/libfdt/Makefile.libfdt
index b6d8fc0..45a5bf4 100644
--- a/libfdt/Makefile.libfdt
+++ b/libfdt/Makefile.libfdt
@@ -8,7 +8,7 @@ LIBFDT_soname = libfdt.$(SHAREDLIB_EXT).1
LIBFDT_INCLUDES = fdt.h libfdt.h libfdt_env.h
LIBFDT_VERSION = version.lds
LIBFDT_SRCS = fdt.c fdt_ro.c fdt_wip.c fdt_sw.c fdt_rw.c fdt_strerror.c fdt_empty_tree.c \
- fdt_addresses.c fdt_overlay.c fdt_check.c
+ fdt_addresses.c fdt_overlay.c fdt_check.c fdt_region.c
LIBFDT_OBJS = $(LIBFDT_SRCS:%.c=%.o)
LIBFDT_LIB = libfdt-$(DTC_VERSION).$(SHAREDLIB_EXT)
diff --git a/libfdt/fdt_region.c b/libfdt/fdt_region.c
new file mode 100644
index 0000000..78a006a
--- /dev/null
+++ b/libfdt/fdt_region.c
@@ -0,0 +1,369 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
+/*
+ * Selection of regions of a devicetree blob
+ *
+ * Copyright 2021 Google LLC
+ * Written by Simon Glass <sjg@xxxxxxxxxxxx>
+ */
+
+#include "libfdt_env.h"
+
+#include <fdt.h>
+#include <libfdt.h>
+
+#include "libfdt_internal.h"
+
+/**
+ * fdt_add_region() - Add a new region to our list
+ *
+ * The region is added if there is space, but in any case we increment the
+ * count. If permitted, and the new region overlaps the last one, we merge
+ * them.
+ *
+ * @info: State information
+ * @offset: Start offset of region
+ * @size: Size of region
+ */
+static int fdt_add_region(struct fdt_region_state *info, int offset, int size)
+{
+ struct fdt_region *reg;
+
+ reg = info->region ? &info->region[info->count - 1] : NULL;
+ if (info->can_merge && info->count &&
+ info->count <= info->max_regions &&
+ reg && offset <= reg->offset + reg->size) {
+ reg->size = offset + size - reg->offset;
+ } else if (info->count++ < info->max_regions) {
+ if (reg) {
+ reg++;
+ reg->offset = offset;
+ reg->size = size;
+ }
+ } else {
+ return -1;
+ }
+
+ return 0;
+}
+
+/**
+ * fdt_include_supernodes() - Include supernodes required by this node
+ *
+ * When we decided to include a node or property which is not at the top
+ * level, this function forces the inclusion of higher level nodes. For
+ * example, given this tree:
+ *
+ * / {
+ * testing {
+ * }
+ * }
+ *
+ * If we decide to include testing then we need the root node to have a valid
+ * tree. This function adds those regions.
+ *
+ * @info: State information
+ * @depth: Current stack depth
+ */
+static int fdt_include_supernodes(struct fdt_region_state *info, int depth)
+{
+ int base = fdt_off_dt_struct(info->fdt);
+ int start, stop_at;
+ int i;
+
+ /*
+ * Work down the stack looking for supernodes that we didn't include.
+ * The algortihm here is actually pretty simple, since we know that
+ * no previous subnode had to include these nodes, or if it did, we
+ * marked them as included (on the stack) already.
+ */
+ for (i = 0; i <= depth; i++) {
+ if (!info->stack[i].included) {
+ start = info->stack[i].offset;
+
+ /* Add the FDT_BEGIN_NODE tag of this supernode */
+ fdt_next_tag(info->fdt, start, &stop_at);
+ if (fdt_add_region(info, base + start,
+ stop_at - start))
+ return -1;
+
+ /* Remember that this supernode is now included */
+ info->stack[i].included = 1;
+ info->can_merge = 1;
+ }
+
+ /* Force (later) generation of the FDT_END_NODE tag */
+ if (!info->stack[i].want)
+ info->stack[i].want = WANT_NODES_ONLY;
+ }
+
+ return 0;
+}
+
+int fdt_first_region(const void *fdt, fdt_region_func h_include, void *priv,
+ struct fdt_region *region, char *path, int path_len,
+ int flags, struct fdt_region_state *info)
+{
+ struct fdt_region_ptrs *p = &info->ptrs;
+
+ /* Set up our state */
+ info->fdt = fdt;
+ info->can_merge = 1;
+ info->max_regions = 1;
+ info->start = -1;
+ info->path = path;
+ info->path_len = path_len;
+ info->flags = flags;
+ p->want = WANT_NOTHING;
+ p->end = path;
+ *p->end = '\0';
+ p->nextoffset = 0;
+ p->depth = -1;
+ p->done = FDT_DONE_NOTHING;
+
+ return fdt_next_region(fdt, h_include, priv, region, info);
+}
+
+/*
+ * Theory of operation
+ *
+ * Note: in this description 'included' means that a node (or other part of
+ * the tree) should be included in the region list, i.e. it will have a region
+ * which covers its part of the tree.
+ *
+ * This function maintains some state from the last time it is called. It
+ * checks the next part of the tree that it is supposed to look at
+ * (p.nextoffset) to see if that should be included or not. When it finds
+ * something to include, it sets info->start to its offset. This marks the
+ * start of the region we want to include.
+ *
+ * Once info->start is set to the start (i.e. not -1), we continue scanning
+ * until we find something that we don't want included. This will be the end
+ * of a region. At this point we can close off the region and add it to the
+ * list. So we do so, and reset info->start to -1.
+ *
+ * One complication here is that we want to merge regions. So when we come to
+ * add another region later, we may in fact merge it with the previous one if
+ * one ends where the other starts.
+ *
+ * The function fdt_add_region() will return -1 if it fails to add the region,
+ * because we already have a region ready to be returned, and the new one
+ * cannot be merged in with it. In this case, we must return the region we
+ * found, and wait for another call to this function. When it comes, we will
+ * repeat the processing of the tag and again try to add a region. This time it
+ * will succeed.
+ *
+ * The current state of the pointers (stack, offset, etc.) is maintained in
+ * a ptrs member. At the start of every loop iteration we make a copy of it.
+ * The copy is then updated as the tag is processed. Only if we get to the end
+ * of the loop iteration (and successfully call fdt_add_region() if we need
+ * to) can we commit the changes we have made to these pointers. For example,
+ * if we see an FDT_END_NODE tag we will decrement the depth value. But if we
+ * need to add a region for this tag (let's say because the previous tag is
+ * included and this FDT_END_NODE tag is not included) then we will only commit
+ * the result if we were able to add the region. That allows us to retry again
+ * next time.
+ *
+ * We keep track of a variable called 'want' which tells us what we want to
+ * include when there is no specific information provided by the h_include()
+ * function for a particular property. This basically handles the inclusion of
+ * properties which are pulled in by virtue of the node they are in. So if you
+ * include a node, its properties are also included. In this case 'want' will
+ * be WANT_NODES_AND_PROPS.
+ *
+ * Using 'want' we work out 'include', which tells us whether this current tag
+ * should be included or not. As you can imagine, if the value of 'include'
+ * changes, that means we are on a boundary between nodes to include and nodes
+ * to exclude. At this point we either close off a previous region and add it
+ * to the list, or mark the start of a new region.
+ *
+ * Apart from the nodes, we have the FDT_END tag, mem_rsvmap and the string
+ * list. The last two are not handled at present. The FDT_END tag is dealt with
+ * as a whole (i.e. we create a region for it if is to be included).
+ */
+int fdt_next_region(const void *fdt, fdt_region_func h_include, void *priv,
+ struct fdt_region *region, struct fdt_region_state *info)
+{
+ int base = fdt_off_dt_struct(fdt);
+ int last_node = 0;
+ const char *str;
+
+ info->region = region;
+ info->count = 0;
+
+ /*
+ * Work through the tags one by one, deciding whether each needs to
+ * be included or not. We set the variable 'include' to indicate our
+ * decision. 'want' is used to track what we want to include absent
+ * further information from the h_include() function - it allows us to
+ * pick up all the properties (and/or subnode tags) of a node that we
+ * have been asked to include.
+ */
+ while (info->ptrs.done < FDT_DONE_STRUCT) {
+ const struct fdt_property *prop;
+ struct fdt_region_ptrs p;
+ const char *name;
+ int include = 0;
+ int stop_at = 0;
+ uint32_t tag;
+ int offset;
+ int val;
+ int len;
+
+ /*
+ * Make a copy of our pointers. If we make it to the end of
+ * this block then we will commit them back to info->ptrs.
+ * Otherwise we can try again from the same starting state
+ * next time we are called.
+ */
+ p = info->ptrs;
+
+ /*
+ * Find the tag, and the offset of the next one. If we need to
+ * stop including tags, then by default we stop *after*
+ * including the current tag
+ */
+ offset = p.nextoffset;
+ tag = fdt_next_tag(fdt, offset, &p.nextoffset);
+ stop_at = p.nextoffset;
+
+ switch (tag) {
+ case FDT_PROP:
+ stop_at = offset;
+ prop = fdt_get_property_by_offset(fdt, offset, NULL);
+ str = fdt_string(fdt, fdt32_to_cpu(prop->nameoff));
+ val = h_include(priv, fdt, last_node, FDT_IS_PROP, str,
+ strlen(str) + 1);
+ if (val == -1) {
+ include = p.want >= WANT_NODES_AND_PROPS;
+ } else {
+ include = val;
+ /*
+ * Make sure we include the } for this block.
+ * It might be more correct to have this done
+ * by the call to fdt_include_supernodes() in
+ * the case where it adds the node we are
+ * currently in, but this is equivalent.
+ */
+ if ((info->flags & FDT_REG_SUPERNODES) && val &&
+ !p.want)
+ p.want = WANT_NODES_ONLY;
+ }
+
+ /* Value grepping is not yet supported */
+ break;
+
+ case FDT_NOP:
+ include = p.want >= WANT_NODES_AND_PROPS;
+ stop_at = offset;
+ break;
+
+ case FDT_BEGIN_NODE:
+ last_node = offset;
+ p.depth++;
+ if (p.depth == FDT_MAX_DEPTH)
+ return -FDT_ERR_TOODEEP;
+ name = fdt_get_name(fdt, offset, &len);
+ if (p.end - info->path + 2 + len >= info->path_len)
+ return -FDT_ERR_NOSPACE;
+
+ /* Build the full path of this node */
+ if (p.end != info->path + 1)
+ *p.end++ = '/';
+ strcpy(p.end, name);
+ p.end += len;
+ info->stack[p.depth].want = p.want;
+ info->stack[p.depth].offset = offset;
+
+ /*
+ * We are not intending to include this node unless
+ * it matches, so make sure we stop *before* its tag.
+ */
+ stop_at = offset;
+ p.want = WANT_NOTHING;
+ val = h_include(priv, fdt, offset, FDT_IS_NODE,
+ info->path, p.end - info->path + 1);
+
+ /* Include this if requested */
+ if (val)
+ p.want = WANT_NODES_AND_PROPS;
+
+ /* If not requested, decay our 'p.want' value */
+ else if (p.want)
+ p.want--;
+
+ /* Not including this tag, so stop now */
+ else
+ stop_at = offset;
+
+ /*
+ * Decide whether to include this tag, and update our
+ * stack with the state for this node
+ */
+ include = p.want;
+ info->stack[p.depth].included = include;
+ break;
+
+ case FDT_END_NODE:
+ include = p.want;
+ if (p.depth < 0)
+ return -FDT_ERR_BADSTRUCTURE;
+
+ /*
+ * If we don't want this node, stop right away, unless
+ * we are including subnodes
+ */
+ if (!p.want)
+ stop_at = offset;
+ p.want = info->stack[p.depth].want;
+ p.depth--;
+ while (p.end > info->path && *--p.end != '/')
+ ;
+ *p.end = '\0';
+ break;
+
+ case FDT_END:
+ /* We always include the end tag */
+ include = 1;
+ p.done = FDT_DONE_STRUCT;
+ break;
+ }
+
+ /* If this tag is to be included, mark it as region start */
+ if (include && info->start == -1) {
+ /* Include any supernodes required by this one */
+ if (info->flags & FDT_REG_SUPERNODES) {
+ if (fdt_include_supernodes(info, p.depth))
+ return 0;
+ }
+ info->start = offset;
+ }
+
+ /*
+ * If this tag is not to be included, finish up the current
+ * region.
+ */
+ if (!include && info->start != -1) {
+ if (fdt_add_region(info, base + info->start,
+ stop_at - info->start))
+ return 0;
+ info->start = -1;
+ info->can_merge = 1;
+ }
+
+ /* If we have made it this far, we can commit our pointers */
+ info->ptrs = p;
+ }
+
+ /* Add a region for the END tag and a separate one for string table */
+ if (info->ptrs.done < FDT_DONE_END) {
+ if (info->ptrs.nextoffset != (int)fdt_size_dt_struct(fdt))
+ return -FDT_ERR_BADSTRUCTURE;
+
+ if (fdt_add_region(info, base + info->start,
+ info->ptrs.nextoffset - info->start))
+ return 0;
+ info->ptrs.done++;
+ }
+
+ return info->count > 0 ? 0 : -FDT_ERR_NOTFOUND;
+}
diff --git a/libfdt/libfdt.h b/libfdt/libfdt.h
index 7f117e8..dcac768 100644
--- a/libfdt/libfdt.h
+++ b/libfdt/libfdt.h
@@ -106,7 +106,12 @@ extern "C" {
/* FDT_ERR_ALIGNMENT: The device tree base address is not 8-byte
* aligned. */
-#define FDT_ERR_MAX 19
+#define FDT_ERR_TOODEEP 20
+ /* FDT_ERR_TOODEEP: The depth of a node has exceeded the internal
+ * libfdt limit. This can happen if you have more than
+ * FDT_MAX_DEPTH nested nodes. */
+
+#define FDT_ERR_MAX 20
/* constants */
#define FDT_MAX_PHANDLE 0xfffffffe
@@ -2122,6 +2127,222 @@ int fdt_overlay_apply(void *fdt, void *fdto);
const char *fdt_strerror(int errval);
+#ifndef SWIG /* Regions are not yet supported in Python */
+
+/*
+ * The following struction are for for internal libfdt use. Callers may use
+ * struct fdt_region_state for the purpose of allocating a struct to pass to
+ * fdt_first_region()/
+ *
+ * This is to avoid calling malloc(), or requiring libfdt to return the number
+ * of bytes needed for this struct.
+ */
+
+/**
+ * struct fdt_region - A region within the device tree
+ *
+ * @offset: Start offset in bytes from the start of the device tree
+ * @size: Size in bytes
+ */
+struct fdt_region {
+ int offset;
+ int size;
+};
+
+#define FDT_ANY_GLOBAL (FDT_IS_NODE | FDT_IS_PROP)
+#define FDT_IS_ANY 0x3 /* all the above */
+
+/* We set a reasonable limit on the number of nested nodes */
+#define FDT_MAX_DEPTH 32
+
+/* Decribes what we want to include from the current tag */
+enum want_t {
+ WANT_NOTHING,
+ WANT_NODES_ONLY, /* No properties */
+ WANT_NODES_AND_PROPS, /* Everything for one level */
+};
+
+/* Keeps track of the state at parent nodes */
+struct fdt_subnode_stack {
+ int offset; /* Offset of node */
+ enum want_t want; /* The 'want' value here */
+ int included; /* 1 if we included this node, 0 if not */
+};
+
+/* enum fdt_region_done_t - current state of progress through the dtb */
+enum fdt_region_done_t {
+ FDT_DONE_NOTHING, /* Working on 'struct' region */
+ FDT_DONE_STRUCT, /* Finished the 'struct' region */
+ FDT_DONE_END, /* Finished the 'end' tag */
+};
+
+/* struct fdt_region_ptrs - Keeps track of all the position pointers */
+struct fdt_region_ptrs {
+ int depth; /* Current tree depth */
+ enum fdt_region_done_t done; /* What we have completed scanning */
+ enum want_t want; /* What we are currently including */
+ char *end; /* Pointer to end of full node path */
+ int nextoffset; /* Next node offset to check */
+};
+
+/* The state of our finding algortihm */
+struct fdt_region_state {
+ struct fdt_subnode_stack stack[FDT_MAX_DEPTH]; /* node stack */
+ struct fdt_region *region; /* Contains list of regions found */
+ int count; /* Numnber of regions found */
+ const void *fdt; /* FDT blob */
+ int max_regions; /* Maximum regions to find */
+ int can_merge; /* 1 if we can merge with previous region */
+ int start; /* Start position of current region */
+ struct fdt_region_ptrs ptrs; /* Pointers for what we are up to */
+
+ /* These hold information passed in to fdt_first_region(): */
+ int flags;
+ char *path;
+ int path_len;
+};
+
+/*
+ * Flags for region finding
+ *
+ * Add all supernodes of a matching node/property, useful for creating a
+ * valid subset tree
+ */
+#define FDT_REG_SUPERNODES (1 << 0)
+
+/* Indicates what an fdt part is (node, property) in call to fdt_region_func */
+#define FDT_IS_NODE (1 << 0)
+#define FDT_IS_PROP (1 << 1)
+
+/**
+ * fdt_region_func: Determine whether to include a part or not
+ *
+ * This function is provided by the caller to fdt_first/next_region(). It is
+ * called repeatedly for each device tree element to find out whether it should
+ * be included or not. Every node will generate a call with @type == FDT_IS_NODE
+ * and every property will generate a call with @type = FDT_IS_PROP
+ *
+ * @priv: Private pointer as passed to fdt_find_regions()
+ * @fdt: Pointer to FDT blob
+ * @offset: Offset of this node / property
+ * @type: Type of this part, FDT_IS_...
+ * @data: Pointer to data (full path of node / property name)
+ * @size: Size of data (length of node path / property including \0 terminator
+ * @return 0 to exclude, 1 to include, -1 if no information is available
+ */
+typedef int (*fdt_region_func)(void *priv, const void *fdt, int offset,
+ int type, const char *data, int size);
+
+/**
+ * fdt_first_region() - find regions in device tree
+ *
+ * Given a nodes and properties to include and properties to exclude, find
+ * the regions of the device tree which describe those included parts.
+ *
+ * The use for this function is twofold. Firstly it provides a convenient
+ * way of performing a structure-aware grep of the tree. For example it is
+ * possible to grep for a node and get all the properties associated with
+ * that node. Trees can be subsetted easily, by specifying the nodes that
+ * are required, and then writing out the regions returned by this function.
+ * This is useful for small resource-constrained systems, such as boot
+ * loaders, which want to use an FDT but do not need to know about all of
+ * it.
+ *
+ * Secondly it makes it easy to hash parts of the tree and detect changes.
+ * The intent is to get a list of regions which will be invariant provided
+ * those parts are invariant. For example, if you request a list of regions
+ * for all nodes but exclude the property "data", then you will get the
+ * same region contents regardless of any change to "data" properties.
+ *
+ * This function can be used to produce a byte-stream to send to a hashing
+ * function to verify that critical parts of the FDT have not changed.
+ * Note that semantically null changes in order could still cause false
+ * hash misses. Such reordering might happen if the tree is regenerated
+ * from source, and nodes are reordered (the bytes-stream will be emitted
+ * in a different order and many hash functions will detect this). However
+ * if an existing tree is modified using libfdt functions, such as
+ * fdt_add_subnode() and fdt_setprop(), then this problem is avoided.
+ *
+ * The nodes/properties to include/exclude are defined by a function
+ * provided by the caller. This function is called for each node and
+ * property, and must return:
+ *
+ * 0 - to exclude this part
+ * 1 - to include this part
+ * -1 - for FDT_IS_PROP only: no information is available, so include
+ * if its containing node is included
+ *
+ * The last case is only used to deal with properties. Often a property is
+ * included if its containing node is included - this is the case where
+ * -1 is returned.. However if the property is specifically required to be
+ * included/excluded, then 0 or 1 can be returned. Note that including a
+ * property when the FDT_REG_SUPERNODES flag is given will force its
+ * containing node to be included since it is not valid to have a property
+ * that is not in a node.
+ *
+ * Using the information provided, the inclusion of a node can be controlled
+ * either by a node name or its compatible string, or any other property
+ * that the function can determine.
+ *
+ * As an example, including node "/" means to include the root node and all
+ * root properties. A flag provides a way of also including supernodes (of
+ * which there is none for the root node), and another flag includes
+ * immediate subnodes, so in this case we would get the FDT_BEGIN_NODE and
+ * FDT_END_NODE of all subnodes of /.
+ *
+ * The subnode feature helps in a hashing situation since it prevents the
+ * root node from changing at all. Any change to non-excluded properties,
+ * names of subnodes or number of subnodes would be detected.
+ *
+ * When used with Flat Image Trees (FITs) this provides the ability to hash and
+ * sign parts of * the FIT based on different configurations in the FIT. Then it
+ * is * impossible to change anything about that configuration (include images
+ * attached to the configuration), but it may be possible to add new
+ * configurations, new images or new signatures within the existing
+ * framework.
+ *
+ * The device tree header is not included in the region list. Since the
+ * contents of the FDT are changing (shrinking, often), the caller will need
+ * to regenerate the header anyway.
+ *
+ * @fdt: Device tree to check
+ * @h_include: Function to call to determine whether to include a part or
+ * not
+ * @priv: Private pointer passed to h_include
+ * @region: Returns first region found
+ * @path: Pointer to a temporary string for the function to use for
+ * building path names
+ * @path_len: Length of path, must be large enough to hold the longest
+ * path in the tree
+ * @flags: Various flags that control the region algortihm, see
+ * FDT_REG_...
+ * @return 0, on success
+ * -FDT_ERR_BADSTRUCTURE (too deep or more END tags than BEGIN tags
+ * -FDT_ERR_BADLAYOUT
+ * -FDT_ERR_NOSPACE (path area is too small)
+ * -FDT_ERR_TOODEEP if the tree is too deep
+ */
+int fdt_first_region(const void *fdt, fdt_region_func h_include,
+ void *priv, struct fdt_region *region,
+ char *path, int path_len, int flags,
+ struct fdt_region_state *info);
+
+/** fdt_next_region() - find next region
+ *
+ * See fdt_first_region() for full description. This function finds the
+ * next region according to the provided parameters, which must be the same
+ * as passed to fdt_first_region().
+ *
+ * The flags value is used unchanged from the call to fdt_first_region().
+ *
+ * This function can additionally return -FDT_ERR_NOTFOUND when there are no
+ * more regions
+ */
+int fdt_next_region(const void *fdt, fdt_region_func h_include,
+ void *priv, struct fdt_region *region,
+ struct fdt_region_state *info);
+#endif /* SWIG */
+
#ifdef __cplusplus
}
#endif
diff --git a/libfdt/meson.build b/libfdt/meson.build
index 0307ffb..d0c39dd 100644
--- a/libfdt/meson.build
+++ b/libfdt/meson.build
@@ -9,6 +9,7 @@ sources = files(
'fdt_check.c',
'fdt_empty_tree.c',
'fdt_overlay.c',
+ 'fdt_region.c',
'fdt_ro.c',
'fdt_rw.c',
'fdt_strerror.c',
diff --git a/libfdt/version.lds b/libfdt/version.lds
index 7ab85f1..365d560 100644
--- a/libfdt/version.lds
+++ b/libfdt/version.lds
@@ -77,6 +77,8 @@ LIBFDT_1.2 {
fdt_appendprop_addrrange;
fdt_setprop_inplace_namelen_partial;
fdt_create_with_flags;
+ fdt_first_region;
+ fdt_next_region;
local:
*;
};
--
2.34.0.rc0.344.g81b53c2807-goog
