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-rw-r--r--lib/bootconfig.c36
1 files changed, 23 insertions, 13 deletions
diff --git a/lib/bootconfig.c b/lib/bootconfig.c
index 2c905a91d4eb..b44bba0f1583 100644
--- a/lib/bootconfig.c
+++ b/lib/bootconfig.c
@@ -31,6 +31,8 @@ static size_t xbc_data_size __initdata;
static struct xbc_node *last_parent __initdata;
static const char *xbc_err_msg __initdata;
static int xbc_err_pos __initdata;
+static int open_brace[XBC_DEPTH_MAX] __initdata;
+static int brace_index __initdata;
static int __init xbc_parse_error(const char *msg, const char *p)
{
@@ -431,27 +433,27 @@ static char *skip_spaces_until_newline(char *p)
return p;
}
-static int __init __xbc_open_brace(void)
+static int __init __xbc_open_brace(char *p)
{
- /* Mark the last key as open brace */
- last_parent->next = XBC_NODE_MAX;
+ /* Push the last key as open brace */
+ open_brace[brace_index++] = xbc_node_index(last_parent);
+ if (brace_index >= XBC_DEPTH_MAX)
+ return xbc_parse_error("Exceed max depth of braces", p);
return 0;
}
static int __init __xbc_close_brace(char *p)
{
- struct xbc_node *node;
-
- if (!last_parent || last_parent->next != XBC_NODE_MAX)
+ brace_index--;
+ if (!last_parent || brace_index < 0 ||
+ (open_brace[brace_index] != xbc_node_index(last_parent)))
return xbc_parse_error("Unexpected closing brace", p);
- node = last_parent;
- node->next = 0;
- do {
- node = xbc_node_get_parent(node);
- } while (node && node->next != XBC_NODE_MAX);
- last_parent = node;
+ if (brace_index == 0)
+ last_parent = NULL;
+ else
+ last_parent = &xbc_nodes[open_brace[brace_index - 1]];
return 0;
}
@@ -661,7 +663,7 @@ static int __init xbc_open_brace(char **k, char *n)
return ret;
*k = n;
- return __xbc_open_brace();
+ return __xbc_open_brace(n - 1);
}
static int __init xbc_close_brace(char **k, char *n)
@@ -681,6 +683,13 @@ static int __init xbc_verify_tree(void)
int i, depth, len, wlen;
struct xbc_node *n, *m;
+ /* Brace closing */
+ if (brace_index) {
+ n = &xbc_nodes[open_brace[brace_index]];
+ return xbc_parse_error("Brace is not closed",
+ xbc_node_get_data(n));
+ }
+
/* Empty tree */
if (xbc_node_num == 0) {
xbc_parse_error("Empty config", xbc_data);
@@ -745,6 +754,7 @@ void __init xbc_destroy_all(void)
xbc_node_num = 0;
memblock_free(__pa(xbc_nodes), sizeof(struct xbc_node) * XBC_NODE_MAX);
xbc_nodes = NULL;
+ brace_index = 0;
}
/**