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Diffstat (limited to 'libfdt/fdt_ro.c')
-rw-r--r--libfdt/fdt_ro.c87
1 files changed, 64 insertions, 23 deletions
diff --git a/libfdt/fdt_ro.c b/libfdt/fdt_ro.c
index 69af7bb843..b09a6e9eb7 100644
--- a/libfdt/fdt_ro.c
+++ b/libfdt/fdt_ro.c
@@ -59,8 +59,8 @@
#include "libfdt_internal.h"
-static int nodename_eq(const void *fdt, int offset,
- const char *s, int len)
+static int _fdt_nodename_eq(const void *fdt, int offset,
+ const char *s, int len)
{
const char *p = fdt_offset_ptr(fdt, offset + FDT_TAGSIZE, len+1);
@@ -81,12 +81,20 @@ static int nodename_eq(const void *fdt, int offset,
const char *fdt_string(const void *fdt, int stroffset)
{
- return (char *)fdt + fdt_off_dt_strings(fdt) + stroffset;
+ return (const char *)fdt + fdt_off_dt_strings(fdt) + stroffset;
+}
+
+static int _fdt_string_eq(const void *fdt, int stroffset,
+ const char *s, int len)
+{
+ const char *p = fdt_string(fdt, stroffset);
+
+ return (strlen(p) == len) && (memcmp(p, s, len) == 0);
}
int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size)
{
- CHECK_HEADER(fdt);
+ FDT_CHECK_HEADER(fdt);
*address = fdt64_to_cpu(_fdt_mem_rsv(fdt, n)->address);
*size = fdt64_to_cpu(_fdt_mem_rsv(fdt, n)->size);
return 0;
@@ -106,7 +114,7 @@ int fdt_subnode_offset_namelen(const void *fdt, int offset,
{
int depth;
- CHECK_HEADER(fdt);
+ FDT_CHECK_HEADER(fdt);
for (depth = 0;
offset >= 0;
@@ -114,7 +122,7 @@ int fdt_subnode_offset_namelen(const void *fdt, int offset,
if (depth < 0)
return -FDT_ERR_NOTFOUND;
else if ((depth == 1)
- && nodename_eq(fdt, offset, name, namelen))
+ && _fdt_nodename_eq(fdt, offset, name, namelen))
return offset;
}
@@ -133,10 +141,27 @@ int fdt_path_offset(const void *fdt, const char *path)
const char *p = path;
int offset = 0;
- CHECK_HEADER(fdt);
+ FDT_CHECK_HEADER(fdt);
+
+ /* see if we have an alias */
+ if (*path != '/') {
+ const char *q;
+ int aliasoffset = fdt_path_offset(fdt, "/aliases");
+
+ if (aliasoffset < 0)
+ return -FDT_ERR_BADPATH;
- if (*path != '/')
- return -FDT_ERR_BADPATH;
+ q = strchr(path, '/');
+ if (!q)
+ q = end;
+
+ p = fdt_getprop_namelen(fdt, aliasoffset, path, q - p, NULL);
+ if (!p)
+ return -FDT_ERR_BADPATH;
+ offset = fdt_path_offset(fdt, p);
+
+ p = q;
+ }
while (*p) {
const char *q;
@@ -179,9 +204,10 @@ const char *fdt_get_name(const void *fdt, int nodeoffset, int *len)
return NULL;
}
-const struct fdt_property *fdt_get_property(const void *fdt,
- int nodeoffset,
- const char *name, int *lenp)
+const struct fdt_property *fdt_get_property_namelen(const void *fdt,
+ int nodeoffset,
+ const char *name,
+ int namelen, int *lenp)
{
uint32_t tag;
const struct fdt_property *prop;
@@ -214,7 +240,7 @@ const struct fdt_property *fdt_get_property(const void *fdt,
if (! prop)
goto fail;
namestroff = fdt32_to_cpu(prop->nameoff);
- if (streq(fdt_string(fdt, namestroff), name)) {
+ if (_fdt_string_eq(fdt, namestroff, name, namelen)) {
/* Found it! */
int len = fdt32_to_cpu(prop->len);
prop = fdt_offset_ptr(fdt, offset,
@@ -242,18 +268,32 @@ const struct fdt_property *fdt_get_property(const void *fdt,
return NULL;
}
-const void *fdt_getprop(const void *fdt, int nodeoffset,
- const char *name, int *lenp)
+const struct fdt_property *fdt_get_property(const void *fdt,
+ int nodeoffset,
+ const char *name, int *lenp)
+{
+ return fdt_get_property_namelen(fdt, nodeoffset, name,
+ strlen(name), lenp);
+}
+
+const void *fdt_getprop_namelen(const void *fdt, int nodeoffset,
+ const char *name, int namelen, int *lenp)
{
const struct fdt_property *prop;
- prop = fdt_get_property(fdt, nodeoffset, name, lenp);
+ prop = fdt_get_property_namelen(fdt, nodeoffset, name, namelen, lenp);
if (! prop)
return NULL;
return prop->data;
}
+const void *fdt_getprop(const void *fdt, int nodeoffset,
+ const char *name, int *lenp)
+{
+ return fdt_getprop_namelen(fdt, nodeoffset, name, strlen(name), lenp);
+}
+
uint32_t fdt_get_phandle(const void *fdt, int nodeoffset)
{
const uint32_t *php;
@@ -272,7 +312,7 @@ int fdt_get_path(const void *fdt, int nodeoffset, char *buf, int buflen)
int offset, depth, namelen;
const char *name;
- CHECK_HEADER(fdt);
+ FDT_CHECK_HEADER(fdt);
if (buflen < 2)
return -FDT_ERR_NOSPACE;
@@ -325,7 +365,7 @@ int fdt_supernode_atdepth_offset(const void *fdt, int nodeoffset,
int offset, depth;
int supernodeoffset = -FDT_ERR_INTERNAL;
- CHECK_HEADER(fdt);
+ FDT_CHECK_HEADER(fdt);
if (supernodedepth < 0)
return -FDT_ERR_NOTFOUND;
@@ -384,7 +424,7 @@ int fdt_node_offset_by_prop_value(const void *fdt, int startoffset,
const void *val;
int len;
- CHECK_HEADER(fdt);
+ FDT_CHECK_HEADER(fdt);
/* FIXME: The algorithm here is pretty horrible: we scan each
* property of a node in fdt_getprop(), then if that didn't
@@ -412,10 +452,11 @@ int fdt_node_offset_by_phandle(const void *fdt, uint32_t phandle)
&phandle, sizeof(phandle));
}
-int _stringlist_contains(const void *strlist, int listlen, const char *str)
+static int _fdt_stringlist_contains(const char *strlist, int listlen,
+ const char *str)
{
int len = strlen(str);
- const void *p;
+ const char *p;
while (listlen >= len) {
if (memcmp(str, strlist, len+1) == 0)
@@ -438,7 +479,7 @@ int fdt_node_check_compatible(const void *fdt, int nodeoffset,
prop = fdt_getprop(fdt, nodeoffset, "compatible", &len);
if (!prop)
return len;
- if (_stringlist_contains(prop, len, compatible))
+ if (_fdt_stringlist_contains(prop, len, compatible))
return 0;
else
return 1;
@@ -449,7 +490,7 @@ int fdt_node_offset_by_compatible(const void *fdt, int startoffset,
{
int offset, err;
- CHECK_HEADER(fdt);
+ FDT_CHECK_HEADER(fdt);
/* FIXME: The algorithm here is pretty horrible: we scan each
* property of a node in fdt_node_check_compatible(), then if
generated by cgit v1.2.3 (git 2.39.1) at 2025-06-05 15:25:22 +0000