* grub-core/lib/fdt.c: Fix miscellaneous bugs.
This commit is contained in:
parent
74124c344c
commit
526d3d25e2
2 changed files with 90 additions and 52 deletions
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@ -1,3 +1,7 @@
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2013-10-28 Francesco Lavra <francescolavra.fl@gmail.com>
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* grub-core/lib/fdt.c: Fix miscellaneous bugs.
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2013-10-28 Vladimir Serbinenko <phcoder@gmail.com>
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* grub-core/lib/progress.c (grub_file_progress_hook_real): Add missing
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@ -43,6 +43,16 @@
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#define prop_entry_size(prop_len) \
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(3 * sizeof(grub_uint32_t) + ALIGN_UP(prop_len, sizeof(grub_uint32_t)))
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#define SKIP_NODE_NAME(name, token, end) \
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name = (char *) ((token) + 1); \
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while (name < (char *) end) \
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{ \
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if (!*name++) \
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break; \
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} \
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token = (grub_uint32_t *) ALIGN_UP((grub_addr_t) (name), sizeof(*token))
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static grub_uint32_t *get_next_node (const void *fdt, char *node_name)
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{
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grub_uint32_t *end = (void *) struct_end (fdt);
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@ -50,9 +60,9 @@ static grub_uint32_t *get_next_node (const void *fdt, char *node_name)
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if (node_name >= (char *) end)
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return NULL;
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while (*node_name)
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while (*node_name++)
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{
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if (++node_name >= (char *) end)
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if (node_name >= (char *) end)
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return NULL;
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}
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token = (grub_uint32_t *) ALIGN_UP ((grub_addr_t) node_name, 4);
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@ -73,7 +83,8 @@ static grub_uint32_t *get_next_node (const void *fdt, char *node_name)
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case FDT_PROP:
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/* Skip property token and following data (len, nameoff and property
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value). */
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token += 3 + grub_be_to_cpu32 (*(token + 1));
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token += prop_entry_size(grub_be_to_cpu32(*(token + 1)))
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/ sizeof(*token);
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break;
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case FDT_NOP:
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token++;
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@ -116,12 +127,14 @@ static grub_uint32_t get_free_space (void *fdt)
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static int add_subnode (void *fdt, int parentoffset, const char *name)
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{
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grub_uint32_t *begin = (void *) ((grub_addr_t) fdt
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grub_uint32_t *token = (void *) ((grub_addr_t) fdt
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+ grub_fdt_get_off_dt_struct(fdt)
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+ parentoffset);
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grub_uint32_t *end = (void *) struct_end (fdt);
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unsigned int entry_size = node_entry_size (name);
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grub_uint32_t *token = begin;
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char *node_name;
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SKIP_NODE_NAME(node_name, token, end);
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/* Insert the new subnode just after the properties of the parent node (if
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any).*/
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@ -132,28 +145,28 @@ static int add_subnode (void *fdt, int parentoffset, const char *name)
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switch (grub_be_to_cpu32(*token))
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{
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case FDT_PROP:
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/* Skip len and nameoff. */
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token += 2;
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/* Skip len, nameoff and property value. */
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token += prop_entry_size(grub_be_to_cpu32(*(token + 1)))
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/ sizeof(*token);
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break;
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case FDT_BEGIN_NODE:
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case FDT_END_NODE:
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goto insert;
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case FDT_NOP:
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token++;
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break;
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default:
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/* invalid token */
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return -1;
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}
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token++;
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}
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insert:
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grub_memmove (token + entry_size, token,
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grub_memmove (token + entry_size / sizeof(*token), token,
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(grub_addr_t) end - (grub_addr_t) token);
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*token = grub_cpu_to_be32(FDT_BEGIN_NODE);
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token[entry_size / sizeof(*token) - 2] = 0; /* padding bytes */
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grub_strcpy((char *) (token + 1), name);
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token += entry_size / sizeof(*token) - 1;
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*token = grub_cpu_to_be32(FDT_END_NODE);
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token[entry_size / sizeof(*token) - 1] = grub_cpu_to_be32(FDT_END_NODE);
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return ((grub_addr_t) token - (grub_addr_t) fdt
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- grub_fdt_get_off_dt_struct(fdt));
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}
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@ -175,29 +188,32 @@ static int rearrange_blocks (void *fdt, unsigned int clearance)
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if ((grub_fdt_get_off_mem_rsvmap (fdt) == off_mem_rsvmap)
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&& (grub_fdt_get_off_dt_struct (fdt) == off_dt_struct))
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{
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/* No need to allocate memory for a temporary FDT, just move the strings
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block if needed. */
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if (grub_fdt_get_off_dt_strings (fdt) != off_dt_strings)
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grub_memmove(fdt_ptr + off_dt_strings,
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fdt_ptr + grub_fdt_get_off_dt_strings (fdt),
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grub_fdt_get_size_dt_strings (fdt));
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return 0;
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}
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{
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/* No need to allocate memory for a temporary FDT, just move the strings
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block if needed. */
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if (grub_fdt_get_off_dt_strings (fdt) != off_dt_strings)
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{
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grub_memmove(fdt_ptr + off_dt_strings,
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fdt_ptr + grub_fdt_get_off_dt_strings (fdt),
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grub_fdt_get_size_dt_strings (fdt));
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grub_fdt_set_off_dt_strings (fdt, off_dt_strings);
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}
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return 0;
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}
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tmp_fdt = grub_malloc (grub_fdt_get_totalsize (fdt));
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if (!tmp_fdt)
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return -1;
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grub_memcpy (tmp_fdt + off_mem_rsvmap,
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fdt_ptr + grub_fdt_get_off_mem_rsvmap (fdt),
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get_mem_rsvmap_size (fdt));
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fdt_ptr + grub_fdt_get_off_mem_rsvmap (fdt),
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get_mem_rsvmap_size (fdt));
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grub_fdt_set_off_mem_rsvmap (fdt, off_mem_rsvmap);
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grub_memcpy (tmp_fdt + off_dt_struct,
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fdt_ptr + grub_fdt_get_off_dt_struct (fdt),
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grub_fdt_get_size_dt_struct (fdt));
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fdt_ptr + grub_fdt_get_off_dt_struct (fdt),
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grub_fdt_get_size_dt_struct (fdt));
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grub_fdt_set_off_dt_struct (fdt, off_dt_struct);
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grub_memcpy (tmp_fdt + off_dt_strings,
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fdt_ptr + grub_fdt_get_off_dt_strings (fdt),
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grub_fdt_get_size_dt_strings (fdt));
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fdt_ptr + grub_fdt_get_off_dt_strings (fdt),
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grub_fdt_get_size_dt_strings (fdt));
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grub_fdt_set_off_dt_strings (fdt, off_dt_strings);
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/* Copy reordered blocks back to fdt. */
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@ -214,9 +230,12 @@ static grub_uint32_t *find_prop (void *fdt, unsigned int nodeoffset,
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grub_uint32_t *prop = (void *) ((grub_addr_t) fdt
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+ grub_fdt_get_off_dt_struct (fdt)
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+ nodeoffset);
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grub_uint32_t *end = (void *) struct_end(fdt);
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grub_uint32_t nameoff;
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char *node_name;
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do
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SKIP_NODE_NAME(node_name, prop, end);
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while (prop < end - 2)
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{
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if (grub_be_to_cpu32(*prop) == FDT_PROP)
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{
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@ -224,15 +243,19 @@ static grub_uint32_t *find_prop (void *fdt, unsigned int nodeoffset,
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if ((nameoff + grub_strlen (name) < grub_fdt_get_size_dt_strings (fdt))
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&& !grub_strcmp (name, (char *) fdt +
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grub_fdt_get_off_dt_strings (fdt) + nameoff))
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return prop;
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prop += prop_entry_size(grub_be_to_cpu32(*prop + 1)) / sizeof (*prop);
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{
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if (prop + prop_entry_size(grub_be_to_cpu32(*(prop + 1)))
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/ sizeof (*prop) >= end)
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return NULL;
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return prop;
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}
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prop += prop_entry_size(grub_be_to_cpu32(*(prop + 1))) / sizeof (*prop);
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}
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else if (grub_be_to_cpu32(*prop) != FDT_NOP)
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else if (grub_be_to_cpu32(*prop) == FDT_NOP)
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prop++;
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else
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return NULL;
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prop++;
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} while ((grub_addr_t) prop < ((grub_addr_t) fdt
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+ grub_fdt_get_off_dt_struct (fdt)
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+ grub_fdt_get_size_dt_struct (fdt)));
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}
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return NULL;
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}
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token = (void *) ((grub_addr_t) fdt + grub_fdt_get_off_dt_struct(fdt)
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+ parentoffset);
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end = (void *) struct_end (fdt);
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if ((token >= end) || (grub_be_to_cpu32(*token) != FDT_BEGIN_NODE))
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return -1;
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SKIP_NODE_NAME(node_name, token, end);
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while (token < end)
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{
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switch (grub_be_to_cpu32(*token))
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if (node_name + grub_strlen (name) >= (char *) end)
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return -1;
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if (!grub_strcmp (node_name, name))
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return (int) ((grub_addr_t) token
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+ ALIGN_UP(grub_strlen (name) + 1, 4)
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return (int) ((grub_addr_t) token - (grub_addr_t) fdt
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- grub_fdt_get_off_dt_struct (fdt));
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token = get_next_node (fdt, node_name);
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if (!token)
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return -1;
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break;
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case FDT_END_NODE:
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return -1;
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case FDT_PROP:
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/* Skip property token and following data (len, nameoff and property
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value). */
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token += 3 + grub_be_to_cpu32 (*(token + 1));
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if (token >= end - 1)
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return -1;
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token += prop_entry_size(grub_be_to_cpu32(*(token + 1)))
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/ sizeof(*token);
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break;
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case FDT_NOP:
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token++;
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int prop_name_present = 0;
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grub_uint32_t nameoff = 0;
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if ((nodeoffset >= grub_fdt_get_size_dt_struct (fdt)) || (nodeoffset & 0x3))
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if ((nodeoffset >= grub_fdt_get_size_dt_struct (fdt)) || (nodeoffset & 0x3)
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|| (grub_be_to_cpu32(*(grub_uint32_t *) ((grub_addr_t) fdt
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+ grub_fdt_get_off_dt_struct (fdt) + nodeoffset))
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!= FDT_BEGIN_NODE))
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return -1;
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prop = find_prop (fdt, nodeoffset, name);
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if (prop)
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prop_name_present = 1;
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for (i = 0; i < prop_len / sizeof(grub_uint32_t); i++)
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*(prop + 3 + i) = grub_cpu_to_be32 (FDT_NOP);
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if (len > prop_len)
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if (len > ALIGN_UP(prop_len, sizeof(grub_uint32_t)))
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{
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/* Length of new property value is greater than the space allocated
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for the current value: a new entry needs to be created, so save the
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+ grub_strlen (name) + 1);
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}
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if (!prop) {
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prop = (void *) ((grub_addr_t) fdt + grub_fdt_get_off_dt_struct (fdt)
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+ nodeoffset);
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grub_memmove (prop + prop_entry_size(len), prop,
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grub_fdt_get_size_dt_struct (fdt) - nodeoffset);
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char *node_name = (char *) ((grub_addr_t) fdt
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+ grub_fdt_get_off_dt_struct (fdt) + nodeoffset
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+ sizeof(grub_uint32_t));
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prop = (void *) (node_name + ALIGN_UP(grub_strlen(node_name) + 1, 4));
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grub_memmove (prop + prop_entry_size(len) / sizeof(*prop), prop,
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struct_end(fdt) - (grub_addr_t) prop);
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grub_fdt_set_size_dt_struct (fdt, grub_fdt_get_size_dt_struct (fdt)
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+ prop_entry_size(len));
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*prop = grub_cpu_to_be32 (FDT_PROP);
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*(prop + 1) = grub_cpu_to_be32 (len);
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*(prop + 2) = grub_cpu_to_be32 (nameoff);
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/* Insert padding bytes at the end of the value; if they are not needed,
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they will be overwritten by the follozing memcpy. */
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*(prop + prop_entry_size(len) / sizeof(grub_uint32_t) - 1) = 0;
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grub_memcpy (prop + 3, val, len);
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}
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*(prop + 1) = grub_cpu_to_be32 (len);
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/* Insert padding bytes at the end of the value; if they are not needed, they
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will be overwritten by the following memcpy. */
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*(prop + prop_entry_size(len) / sizeof(grub_uint32_t) - 1) = 0;
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grub_memcpy (prop + 3, val, len);
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return 0;
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}
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