diff options
Diffstat (limited to 'lib/bootconfig.c')
| -rw-r--r-- | lib/bootconfig.c | 38 |
1 files changed, 24 insertions, 14 deletions
diff --git a/lib/bootconfig.c b/lib/bootconfig.c index 2c905a91d4eb..649ed44f199c 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; } @@ -492,8 +494,8 @@ static int __init __xbc_parse_value(char **__v, char **__n) break; } if (strchr(",;\n#}", c)) { - v = strim(v); *p++ = '\0'; + v = strim(v); break; } } @@ -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; } /** |