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-rw-r--r--libfdt/fdt.c17
-rw-r--r--libfdt/fdt_ro.c26
-rw-r--r--libfdt/fdt_rw.c24
-rw-r--r--libfdt/fdt_sw.c31
-rw-r--r--libfdt/libfdt_internal.h1
5 files changed, 44 insertions, 55 deletions
diff --git a/libfdt/fdt.c b/libfdt/fdt.c
index cfa1989d8..cb08ba0a9 100644
--- a/libfdt/fdt.c
+++ b/libfdt/fdt.c
@@ -133,16 +133,23 @@ uint32_t fdt_next_tag(const void *fdt, int offset, int *nextoffset)
return tag;
}
+int _fdt_check_node_offset(const void *fdt, int offset)
+{
+ if ((offset < 0) || (offset % FDT_TAGSIZE)
+ || (fdt_next_tag(fdt, offset, &offset) != FDT_BEGIN_NODE))
+ return -FDT_ERR_BADOFFSET;
+
+ return offset;
+}
+
int fdt_next_node(const void *fdt, int offset, int *depth)
{
int nextoffset = 0;
uint32_t tag;
- if (offset >= 0) {
- tag = fdt_next_tag(fdt, offset, &nextoffset);
- if (tag != FDT_BEGIN_NODE)
- return -FDT_ERR_BADOFFSET;
- }
+ if (offset >= 0)
+ if ((nextoffset = _fdt_check_node_offset(fdt, offset)) < 0)
+ return nextoffset;
do {
offset = nextoffset;
diff --git a/libfdt/fdt_ro.c b/libfdt/fdt_ro.c
index 11d80d2fa..69af7bb84 100644
--- a/libfdt/fdt_ro.c
+++ b/libfdt/fdt_ro.c
@@ -161,16 +161,12 @@ int fdt_path_offset(const void *fdt, const char *path)
const char *fdt_get_name(const void *fdt, int nodeoffset, int *len)
{
- const struct fdt_node_header *nh;
+ const struct fdt_node_header *nh = _fdt_offset_ptr(fdt, nodeoffset);
int err;
- if ((err = fdt_check_header(fdt)) != 0)
- goto fail;
-
- err = -FDT_ERR_BADOFFSET;
- nh = fdt_offset_ptr(fdt, nodeoffset, sizeof(*nh));
- if (!nh || (fdt32_to_cpu(nh->tag) != FDT_BEGIN_NODE))
- goto fail;
+ if (((err = fdt_check_header(fdt)) != 0)
+ || ((err = _fdt_check_node_offset(fdt, nodeoffset)) < 0))
+ goto fail;
if (len)
*len = strlen(nh->name);
@@ -193,17 +189,11 @@ const struct fdt_property *fdt_get_property(const void *fdt,
int offset, nextoffset;
int err;
- if ((err = fdt_check_header(fdt)) != 0)
- goto fail;
-
- err = -FDT_ERR_BADOFFSET;
- if (nodeoffset % FDT_TAGSIZE)
- goto fail;
-
- tag = fdt_next_tag(fdt, nodeoffset, &nextoffset);
- if (tag != FDT_BEGIN_NODE)
- goto fail;
+ if (((err = fdt_check_header(fdt)) != 0)
+ || ((err = _fdt_check_node_offset(fdt, nodeoffset)) < 0))
+ goto fail;
+ nextoffset = err;
do {
offset = nextoffset;
diff --git a/libfdt/fdt_rw.c b/libfdt/fdt_rw.c
index 8609fa7d7..95a5c2c62 100644
--- a/libfdt/fdt_rw.c
+++ b/libfdt/fdt_rw.c
@@ -176,8 +176,7 @@ int fdt_add_mem_rsv(void *fdt, uint64_t address, uint64_t size)
struct fdt_reserve_entry *re;
int err;
- if ((err = rw_check_header(fdt)))
- return err;
+ RW_CHECK_HEADER(fdt);
re = _fdt_mem_rsv_w(fdt, fdt_num_mem_rsv(fdt));
err = _blob_splice_mem_rsv(fdt, re, 0, 1);
@@ -194,8 +193,8 @@ int fdt_del_mem_rsv(void *fdt, int n)
struct fdt_reserve_entry *re = _fdt_mem_rsv_w(fdt, n);
int err;
- if ((err = rw_check_header(fdt)))
- return err;
+ RW_CHECK_HEADER(fdt);
+
if (n >= fdt_num_mem_rsv(fdt))
return -FDT_ERR_NOTFOUND;
@@ -227,15 +226,13 @@ static int _resize_property(void *fdt, int nodeoffset, const char *name, int len
static int _add_property(void *fdt, int nodeoffset, const char *name, int len,
struct fdt_property **prop)
{
- uint32_t tag;
int proplen;
int nextoffset;
int namestroff;
int err;
- tag = fdt_next_tag(fdt, nodeoffset, &nextoffset);
- if (tag != FDT_BEGIN_NODE)
- return -FDT_ERR_BADOFFSET;
+ if ((nextoffset = _fdt_check_node_offset(fdt, nodeoffset)) < 0)
+ return nextoffset;
namestroff = _find_add_string(fdt, name);
if (namestroff < 0)
@@ -260,8 +257,7 @@ int fdt_set_name(void *fdt, int nodeoffset, const char *name)
int oldlen, newlen;
int err;
- if ((err = rw_check_header(fdt)))
- return err;
+ RW_CHECK_HEADER(fdt);
namep = (char *)fdt_get_name(fdt, nodeoffset, &oldlen);
if (!namep)
@@ -284,8 +280,7 @@ int fdt_setprop(void *fdt, int nodeoffset, const char *name,
struct fdt_property *prop;
int err;
- if ((err = rw_check_header(fdt)))
- return err;
+ RW_CHECK_HEADER(fdt);
err = _resize_property(fdt, nodeoffset, name, len, &prop);
if (err == -FDT_ERR_NOTFOUND)
@@ -456,11 +451,8 @@ int fdt_open_into(const void *fdt, void *buf, int bufsize)
int fdt_pack(void *fdt)
{
int mem_rsv_size;
- int err;
- err = rw_check_header(fdt);
- if (err)
- return err;
+ RW_CHECK_HEADER(fdt);
mem_rsv_size = (fdt_num_mem_rsv(fdt)+1)
* sizeof(struct fdt_reserve_entry);
diff --git a/libfdt/fdt_sw.c b/libfdt/fdt_sw.c
index dda2de34b..df0987606 100644
--- a/libfdt/fdt_sw.c
+++ b/libfdt/fdt_sw.c
@@ -55,13 +55,21 @@
#include "libfdt_internal.h"
-static int check_header_sw(void *fdt)
+static int sw_check_header(void *fdt)
{
if (fdt_magic(fdt) != SW_MAGIC)
return -FDT_ERR_BADMAGIC;
+ /* FIXME: should check more details about the header state */
return 0;
}
+#define SW_CHECK_HEADER(fdt) \
+ { \
+ int err; \
+ if ((err = sw_check_header(fdt)) != 0) \
+ return err; \
+ }
+
static void *grab_space(void *fdt, int len)
{
int offset = fdt_size_dt_struct(fdt);
@@ -102,11 +110,10 @@ int fdt_create(void *buf, int bufsize)
int fdt_add_reservemap_entry(void *fdt, uint64_t addr, uint64_t size)
{
struct fdt_reserve_entry *re;
- int err = check_header_sw(fdt);
int offset;
- if (err)
- return err;
+ SW_CHECK_HEADER(fdt);
+
if (fdt_size_dt_struct(fdt))
return -FDT_ERR_BADSTATE;
@@ -131,11 +138,9 @@ int fdt_finish_reservemap(void *fdt)
int fdt_begin_node(void *fdt, const char *name)
{
struct fdt_node_header *nh;
- int err = check_header_sw(fdt);
int namelen = strlen(name) + 1;
- if (err)
- return err;
+ SW_CHECK_HEADER(fdt);
nh = grab_space(fdt, sizeof(*nh) + ALIGN(namelen, FDT_TAGSIZE));
if (! nh)
@@ -149,10 +154,8 @@ int fdt_begin_node(void *fdt, const char *name)
int fdt_end_node(void *fdt)
{
uint32_t *en;
- int err = check_header_sw(fdt);
- if (err)
- return err;
+ SW_CHECK_HEADER(fdt);
en = grab_space(fdt, FDT_TAGSIZE);
if (! en)
@@ -188,11 +191,9 @@ static int find_add_string(void *fdt, const char *s)
int fdt_property(void *fdt, const char *name, const void *val, int len)
{
struct fdt_property *prop;
- int err = check_header_sw(fdt);
int nameoff;
- if (err)
- return err;
+ SW_CHECK_HEADER(fdt);
nameoff = find_add_string(fdt, name);
if (nameoff == 0)
@@ -211,15 +212,13 @@ int fdt_property(void *fdt, const char *name, const void *val, int len)
int fdt_finish(void *fdt)
{
- int err = check_header_sw(fdt);
char *p = (char *)fdt;
uint32_t *end;
int oldstroffset, newstroffset;
uint32_t tag;
int offset, nextoffset;
- if (err)
- return err;
+ SW_CHECK_HEADER(fdt);
/* Add terminator */
end = grab_space(fdt, sizeof(*end));
diff --git a/libfdt/libfdt_internal.h b/libfdt/libfdt_internal.h
index 52e1b8d81..f72e70dbe 100644
--- a/libfdt/libfdt_internal.h
+++ b/libfdt/libfdt_internal.h
@@ -66,6 +66,7 @@
}
uint32_t _fdt_next_tag(const void *fdt, int startoffset, int *nextoffset);
+int _fdt_check_node_offset(const void *fdt, int offset);
const char *_fdt_find_string(const char *strtab, int tabsize, const char *s);
int _fdt_node_end_offset(void *fdt, int nodeoffset);
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-10-31 23:48:10 +0000