diff --git a/arch/arm/mach-tegra/xusb-padctl-common.c b/arch/arm/mach-tegra/xusb-padctl-common.c index 18ad7bf..6867065 100644 --- a/arch/arm/mach-tegra/xusb-padctl-common.c +++ b/arch/arm/mach-tegra/xusb-padctl-common.c @@ -78,11 +78,11 @@ tegra_xusb_padctl_group_parse_dt(struct tegra_xusb_padctl *padctl, const void *fdt, int node) { unsigned int i; - int len, err; + int len; group->name = fdt_get_name(fdt, node, &len); - len = fdt_count_strings(fdt, node, "nvidia,lanes"); + len = fdt_stringlist_count(fdt, node, "nvidia,lanes"); if (len < 0) { error("failed to parse \"nvidia,lanes\" property"); return -EINVAL; @@ -91,9 +91,9 @@ tegra_xusb_padctl_group_parse_dt(struct tegra_xusb_padctl *padctl, group->num_pins = len; for (i = 0; i < group->num_pins; i++) { - err = fdt_get_string_index(fdt, node, "nvidia,lanes", i, - &group->pins[i]); - if (err < 0) { + group->pins[i] = fdt_stringlist_get(fdt, node, "nvidia,lanes", + i, NULL); + if (!group->pins[i]) { error("failed to read string from \"nvidia,lanes\" property"); return -EINVAL; } @@ -101,8 +101,8 @@ tegra_xusb_padctl_group_parse_dt(struct tegra_xusb_padctl *padctl, group->num_pins = len; - err = fdt_get_string(fdt, node, "nvidia,function", &group->func); - if (err < 0) { + group->func = fdt_stringlist_get(fdt, node, "nvidia,function", 0, NULL); + if (!group->func) { error("failed to parse \"nvidia,func\" property"); return -EINVAL; } diff --git a/arch/arm/mach-uniphier/board_late_init.c b/arch/arm/mach-uniphier/board_late_init.c index a454126..f23295f 100644 --- a/arch/arm/mach-uniphier/board_late_init.c +++ b/arch/arm/mach-uniphier/board_late_init.c @@ -37,13 +37,12 @@ static int uniphier_set_fdt_file(void) const char *compat; char dtb_name[256]; int buf_len = 256; - int ret; if (getenv("fdt_file")) return 0; /* do nothing if it is already set */ - ret = fdt_get_string(gd->fdt_blob, 0, "compatible", &compat); - if (ret) + compat = fdt_stringlist_get(gd->fdt_blob, 0, "compatible", 0, NULL); + if (!compat) return -EINVAL; if (strncmp(compat, VENDOR_PREFIX, strlen(VENDOR_PREFIX))) diff --git a/arch/x86/cpu/irq.c b/arch/x86/cpu/irq.c index df3cd0a..9364410 100644 --- a/arch/x86/cpu/irq.c +++ b/arch/x86/cpu/irq.c @@ -103,11 +103,12 @@ static int create_pirq_routing_table(struct udevice *dev) /* extract the bdf from fdt_pci_addr */ priv->bdf = dm_pci_get_bdf(dev->parent); - ret = fdt_find_string(blob, node, "intel,pirq-config", "pci"); + ret = fdt_stringlist_search(blob, node, "intel,pirq-config", "pci"); if (!ret) { priv->config = PIRQ_VIA_PCI; } else { - ret = fdt_find_string(blob, node, "intel,pirq-config", "ibase"); + ret = fdt_stringlist_search(blob, node, "intel,pirq-config", + "ibase"); if (!ret) priv->config = PIRQ_VIA_IBASE; else diff --git a/common/image-fit.c b/common/image-fit.c index 1b0234a..d67678a 100644 --- a/common/image-fit.c +++ b/common/image-fit.c @@ -1457,7 +1457,7 @@ int fit_conf_get_prop_node(const void *fit, int noffset, void fit_conf_print(const void *fit, int noffset, const char *p) { char *desc; - char *uname; + const char *uname; int ret; int loadables_index; @@ -1469,7 +1469,7 @@ void fit_conf_print(const void *fit, int noffset, const char *p) else printf("%s\n", desc); - uname = (char *)fdt_getprop(fit, noffset, FIT_KERNEL_PROP, NULL); + uname = fdt_getprop(fit, noffset, FIT_KERNEL_PROP, NULL); printf("%s Kernel: ", p); if (uname == NULL) printf("unavailable\n"); @@ -1477,26 +1477,23 @@ void fit_conf_print(const void *fit, int noffset, const char *p) printf("%s\n", uname); /* Optional properties */ - uname = (char *)fdt_getprop(fit, noffset, FIT_RAMDISK_PROP, NULL); + uname = fdt_getprop(fit, noffset, FIT_RAMDISK_PROP, NULL); if (uname) printf("%s Init Ramdisk: %s\n", p, uname); - uname = (char *)fdt_getprop(fit, noffset, FIT_FDT_PROP, NULL); + uname = fdt_getprop(fit, noffset, FIT_FDT_PROP, NULL); if (uname) printf("%s FDT: %s\n", p, uname); - uname = (char *)fdt_getprop(fit, noffset, FIT_FPGA_PROP, NULL); + uname = fdt_getprop(fit, noffset, FIT_FPGA_PROP, NULL); if (uname) printf("%s FPGA: %s\n", p, uname); /* Print out all of the specified loadables */ for (loadables_index = 0; - fdt_get_string_index(fit, noffset, - FIT_LOADABLE_PROP, - loadables_index, - (const char **)&uname) == 0; - loadables_index++) - { + uname = fdt_stringlist_get(fit, noffset, FIT_LOADABLE_PROP, + loadables_index, NULL), uname; + loadables_index++) { if (loadables_index == 0) { printf("%s Loadables: ", p); } else { diff --git a/common/image.c b/common/image.c index c0ad36a..0e86c13 100644 --- a/common/image.c +++ b/common/image.c @@ -1305,7 +1305,7 @@ int boot_get_fpga(int argc, char * const argv[], bootm_headers_t *images, void *buf; int conf_noffset; int fit_img_result; - char *uname, *name; + const char *uname, *name; int err; int devnum = 0; /* TODO support multi fpga platforms */ const fpga_desc * const desc = fpga_get_desc(devnum); @@ -1332,9 +1332,9 @@ int boot_get_fpga(int argc, char * const argv[], bootm_headers_t *images, case IMAGE_FORMAT_FIT: conf_noffset = fit_conf_get_node(buf, images->fit_uname_cfg); - err = fdt_get_string_index(buf, conf_noffset, FIT_FPGA_PROP, 0, - (const char **)&uname); - if (err < 0) { + uname = fdt_stringlist_get(buf, conf_noffset, FIT_FPGA_PROP, 0, + NULL); + if (!uname) { debug("## FPGA image is not specified\n"); return 0; } @@ -1404,7 +1404,7 @@ int boot_get_loadable(int argc, char * const argv[], bootm_headers_t *images, int loadables_index; int conf_noffset; int fit_img_result; - char *uname; + const char *uname; /* Check to see if the images struct has a FIT configuration */ if (!genimg_has_config(images)) { @@ -1428,15 +1428,14 @@ int boot_get_loadable(int argc, char * const argv[], bootm_headers_t *images, conf_noffset = fit_conf_get_node(buf, images->fit_uname_cfg); for (loadables_index = 0; - fdt_get_string_index(buf, conf_noffset, - FIT_LOADABLE_PROP, - loadables_index, - (const char **)&uname) == 0; + uname = fdt_stringlist_get(buf, conf_noffset, + FIT_LOADABLE_PROP, loadables_index, + NULL), uname; loadables_index++) { fit_img_result = fit_image_load(images, tmp_img_addr, - (const char **)&uname, + &uname, &(images->fit_uname_cfg), arch, IH_TYPE_LOADABLE, BOOTSTAGE_ID_FIT_LOADABLE_START, diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c index 4d78e3f..c42fff6 100644 --- a/drivers/clk/clk-uclass.c +++ b/drivers/clk/clk-uclass.c @@ -101,10 +101,10 @@ int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk) debug("%s(dev=%p, name=%s, clk=%p)\n", __func__, dev, name, clk); - index = fdt_find_string(gd->fdt_blob, dev->of_offset, "clock-names", - name); + index = fdt_stringlist_search(gd->fdt_blob, dev->of_offset, + "clock-names", name); if (index < 0) { - debug("fdt_find_string() failed: %d\n", index); + debug("fdt_stringlist_search() failed: %d\n", index); return index; } diff --git a/drivers/core/device.c b/drivers/core/device.c index b737f1c..1935b8d 100644 --- a/drivers/core/device.c +++ b/drivers/core/device.c @@ -698,7 +698,7 @@ fdt_addr_t dev_get_addr_name(struct udevice *dev, const char *name) #if CONFIG_IS_ENABLED(OF_CONTROL) int index; - index = fdt_find_string(gd->fdt_blob, dev->of_offset, "reg-names", + index = fdt_stringlist_search(gd->fdt_blob, dev->of_offset, "reg-names", name); if (index < 0) return index; diff --git a/drivers/gpio/dwapb_gpio.c b/drivers/gpio/dwapb_gpio.c index 72cec48..471e18a 100644 --- a/drivers/gpio/dwapb_gpio.c +++ b/drivers/gpio/dwapb_gpio.c @@ -132,7 +132,8 @@ static int gpio_dwapb_bind(struct udevice *dev) plat->base = base; plat->bank = bank; plat->pins = fdtdec_get_int(blob, node, "snps,nr-gpios", 0); - ret = fdt_get_string(blob, node, "bank-name", &plat->name); + plat->name = fdt_stringlist_get(blob, node, "bank-name", 0, + NULL); if (ret) goto err; diff --git a/drivers/i2c/mxc_i2c.c b/drivers/i2c/mxc_i2c.c index a26f44e..6247d33 100644 --- a/drivers/i2c/mxc_i2c.c +++ b/drivers/i2c/mxc_i2c.c @@ -773,7 +773,7 @@ static int mxc_i2c_probe(struct udevice *bus) * See Documentation/devicetree/bindings/i2c/i2c-imx.txt * Use gpio to force bus idle when necessary. */ - ret = fdt_find_string(fdt, node, "pinctrl-names", "gpio"); + ret = fdt_stringlist_search(fdt, node, "pinctrl-names", "gpio"); if (ret < 0) { dev_info(dev, "i2c bus %d at %lu, no gpio pinctrl state.\n", bus->seq, i2c_bus->base); } else { diff --git a/drivers/mailbox/mailbox-uclass.c b/drivers/mailbox/mailbox-uclass.c index 40f851d..a7fcde5 100644 --- a/drivers/mailbox/mailbox-uclass.c +++ b/drivers/mailbox/mailbox-uclass.c @@ -85,10 +85,10 @@ int mbox_get_by_name(struct udevice *dev, const char *name, debug("%s(dev=%p, name=%s, chan=%p)\n", __func__, dev, name, chan); - index = fdt_find_string(gd->fdt_blob, dev->of_offset, "mbox-names", - name); + index = fdt_stringlist_search(gd->fdt_blob, dev->of_offset, + "mbox-names", name); if (index < 0) { - debug("fdt_find_string() failed: %d\n", index); + debug("fdt_stringlist_search() failed: %d\n", index); return index; } diff --git a/drivers/net/sun8i_emac.c b/drivers/net/sun8i_emac.c index 4c149e1..91570a2 100644 --- a/drivers/net/sun8i_emac.c +++ b/drivers/net/sun8i_emac.c @@ -456,8 +456,9 @@ static int parse_phy_pins(struct udevice *dev) for (i = 0; ; i++) { int pin; - if (fdt_get_string_index(gd->fdt_blob, offset, - "allwinner,pins", i, &pin_name)) + pin_name = fdt_stringlist_get(gd->fdt_blob, offset, + "allwinner,pins", i, NULL); + if (!pin_name) break; if (pin_name[0] != 'P') continue; diff --git a/drivers/pinctrl/exynos/pinctrl-exynos.c b/drivers/pinctrl/exynos/pinctrl-exynos.c index a28405f..c9c13e6 100644 --- a/drivers/pinctrl/exynos/pinctrl-exynos.c +++ b/drivers/pinctrl/exynos/pinctrl-exynos.c @@ -71,7 +71,7 @@ int exynos_pinctrl_set_state(struct udevice *dev, struct udevice *config) { const void *fdt = gd->fdt_blob; int node = config->of_offset; - unsigned int count, idx, pin_num, ret; + unsigned int count, idx, pin_num; unsigned int pinfunc, pinpud, pindrv; unsigned long reg, value; const char *name; @@ -80,7 +80,7 @@ int exynos_pinctrl_set_state(struct udevice *dev, struct udevice *config) * refer to the following document for the pinctrl bindings * linux/Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt */ - count = fdt_count_strings(fdt, node, "samsung,pins"); + count = fdt_stringlist_count(fdt, node, "samsung,pins"); if (count <= 0) return -EINVAL; @@ -89,9 +89,8 @@ int exynos_pinctrl_set_state(struct udevice *dev, struct udevice *config) pindrv = fdtdec_get_int(fdt, node, "samsung,pin-drv", -1); for (idx = 0; idx < count; idx++) { - ret = fdt_get_string_index(fdt, node, "samsung,pins", - idx, &name); - if (ret < 0) + name = fdt_stringlist_get(fdt, node, "samsung,pins", idx, NULL); + if (!name) continue; reg = pin_to_bank_base(dev, name, &pin_num); diff --git a/drivers/pinctrl/meson/pinctrl-meson.c b/drivers/pinctrl/meson/pinctrl-meson.c index d21a3dd..46470ea 100644 --- a/drivers/pinctrl/meson/pinctrl-meson.c +++ b/drivers/pinctrl/meson/pinctrl-meson.c @@ -122,7 +122,7 @@ static fdt_addr_t parse_address(int offset, const char *name, int na, int ns) int index, len = 0; const fdt32_t *reg; - index = fdt_find_string(gd->fdt_blob, offset, "reg-names", name); + index = fdt_stringlist_search(gd->fdt_blob, offset, "reg-names", name); if (index < 0) return FDT_ADDR_T_NONE; diff --git a/drivers/pinctrl/pinctrl-generic.c b/drivers/pinctrl/pinctrl-generic.c index baff40f..482db29 100644 --- a/drivers/pinctrl/pinctrl-generic.c +++ b/drivers/pinctrl/pinctrl-generic.c @@ -306,11 +306,11 @@ static int pinctrl_generic_set_state_subnode(struct udevice *dev, const char *name; int strings_count, selector, i, ret; - strings_count = fdt_count_strings(fdt, node, subnode_target_type); + strings_count = fdt_stringlist_count(fdt, node, subnode_target_type); if (strings_count < 0) { subnode_target_type = "groups"; is_group = true; - strings_count = fdt_count_strings(fdt, node, + strings_count = fdt_stringlist_count(fdt, node, subnode_target_type); if (strings_count < 0) { /* skip this node; may contain config child nodes */ @@ -319,9 +319,9 @@ static int pinctrl_generic_set_state_subnode(struct udevice *dev, } for (i = 0; i < strings_count; i++) { - ret = fdt_get_string_index(fdt, node, subnode_target_type, - i, &name); - if (ret < 0) + name = fdt_stringlist_get(fdt, node, subnode_target_type, i, + NULL); + if (!name) return -EINVAL; if (is_group) diff --git a/drivers/pinctrl/pinctrl-uclass.c b/drivers/pinctrl/pinctrl-uclass.c index 7397de2..02ab9b4 100644 --- a/drivers/pinctrl/pinctrl-uclass.c +++ b/drivers/pinctrl/pinctrl-uclass.c @@ -72,7 +72,7 @@ static int pinctrl_select_state_full(struct udevice *dev, const char *statename) struct udevice *config; int state, size, i, ret; - state = fdt_find_string(fdt, node, "pinctrl-names", statename); + state = fdt_stringlist_search(fdt, node, "pinctrl-names", statename); if (state < 0) { char *end; /* diff --git a/drivers/reset/reset-uclass.c b/drivers/reset/reset-uclass.c index edaecfb..d3744ef 100644 --- a/drivers/reset/reset-uclass.c +++ b/drivers/reset/reset-uclass.c @@ -88,10 +88,10 @@ int reset_get_by_name(struct udevice *dev, const char *name, debug("%s(dev=%p, name=%s, reset_ctl=%p)\n", __func__, dev, name, reset_ctl); - index = fdt_find_string(gd->fdt_blob, dev->of_offset, "reset-names", - name); + index = fdt_stringlist_search(gd->fdt_blob, dev->of_offset, + "reset-names", name); if (index < 0) { - debug("fdt_find_string() failed: %d\n", index); + debug("fdt_stringlist_search() failed: %d\n", index); return index; } diff --git a/drivers/video/sunxi_display.c b/drivers/video/sunxi_display.c index 50b16a9..6cba1b9 100644 --- a/drivers/video/sunxi_display.c +++ b/drivers/video/sunxi_display.c @@ -1562,7 +1562,7 @@ int sunxi_simplefb_setup(void *blob) offset = fdt_node_offset_by_compatible(blob, -1, "allwinner,simple-framebuffer"); while (offset >= 0) { - ret = fdt_find_string(blob, offset, "allwinner,pipeline", + ret = fdt_stringlist_search(blob, offset, "allwinner,pipeline", pipeline); if (ret == 0) break; diff --git a/include/libfdt.h b/include/libfdt.h index 3b1c788..f3b61c9 100644 --- a/include/libfdt.h +++ b/include/libfdt.h @@ -121,12 +121,17 @@ /* FDT_ERR_BADNCELLS: Device tree has a #address-cells, #size-cells * or similar property with a bad format or value */ -#define FDT_ERR_TOODEEP 15 +#define FDT_ERR_BADVALUE 15 + /* FDT_ERR_BADVALUE: Device tree has a property with an unexpected + * value. For example: a property expected to contain a string list + * is not NUL-terminated within the length of its value. */ + +#define FDT_ERR_TOODEEP 16 /* FDT_ERR_TOODEEP: The depth of a node has exceeded the internal * libfdt limit. This can happen if you have more than * FDT_MAX_DEPTH nested nodes. */ -#define FDT_ERR_MAX 15 +#define FDT_ERR_MAX 16 /**********************************************************************/ /* Low-level functions (you probably don't need these) */ @@ -957,51 +962,66 @@ int fdt_node_offset_by_compatible(const void *fdt, int startoffset, int fdt_stringlist_contains(const char *strlist, int listlen, const char *str); /** - * fdt_count_strings - count the number of strings in a string list + * fdt_stringlist_count - count the number of strings in a string list * @fdt: pointer to the device tree blob - * @node: offset of the node + * @nodeoffset: offset of a tree node * @property: name of the property containing the string list - * @return: the number of strings in the given property + * @return: + * the number of strings in the given property + * -FDT_ERR_BADVALUE if the property value is not NUL-terminated + * -FDT_ERR_NOTFOUND if the property does not exist */ -int fdt_count_strings(const void *fdt, int node, const char *property); +int fdt_stringlist_count(const void *fdt, int nodeoffset, const char *property); /** - * fdt_find_string - find a string in a string list and return its index + * fdt_stringlist_search - find a string in a string list and return its index * @fdt: pointer to the device tree blob - * @node: offset of the node + * @nodeoffset: offset of a tree node * @property: name of the property containing the string list * @string: string to look up in the string list - * @return: the index of the string or negative on error + * + * Note that it is possible for this function to succeed on property values + * that are not NUL-terminated. That's because the function will stop after + * finding the first occurrence of @string. This can for example happen with + * small-valued cell properties, such as #address-cells, when searching for + * the empty string. + * + * @return: + * the index of the string in the list of strings + * -FDT_ERR_BADVALUE if the property value is not NUL-terminated + * -FDT_ERR_NOTFOUND if the property does not exist or does not contain + * the given string */ -int fdt_find_string(const void *fdt, int node, const char *property, - const char *string); +int fdt_stringlist_search(const void *fdt, int nodeoffset, const char *property, + const char *string); /** - * fdt_get_string_index() - obtain the string at a given index in a string list + * fdt_stringlist_get() - obtain the string at a given index in a string list * @fdt: pointer to the device tree blob - * @node: offset of the node + * @nodeoffset: offset of a tree node * @property: name of the property containing the string list * @index: index of the string to return - * @output: return location for the string - * @return: 0 if the string was found or a negative error code otherwise - */ -int fdt_get_string_index(const void *fdt, int node, const char *property, - int index, const char **output); - -/** - * fdt_get_string() - obtain the first string in a string list - * @fdt: pointer to the device tree blob - * @node: offset of the node - * @property: name of the property containing the string list - * @output: return location for the string - * @return: 0 if the string was found or a negative error code otherwise - * - * This is a shortcut for: - * - * fdt_get_string_index(fdt, node, property, 0, output). - */ -int fdt_get_string(const void *fdt, int node, const char *property, - const char **output); + * @lenp: return location for the string length or an error code on failure + * + * Note that this will successfully extract strings from properties with + * non-NUL-terminated values. For example on small-valued cell properties + * this function will return the empty string. + * + * If non-NULL, the length of the string (on success) or a negative error-code + * (on failure) will be stored in the integer pointer to by lenp. + * + * @return: + * A pointer to the string at the given index in the string list or NULL on + * failure. On success the length of the string will be stored in the memory + * location pointed to by the lenp parameter, if non-NULL. On failure one of + * the following negative error codes will be returned in the lenp parameter + * (if non-NULL): + * -FDT_ERR_BADVALUE if the property value is not NUL-terminated + * -FDT_ERR_NOTFOUND if the property does not exist + */ +const char *fdt_stringlist_get(const void *fdt, int nodeoffset, + const char *property, int index, + int *lenp); /**********************************************************************/ /* Read-only functions (addressing related) */ diff --git a/lib/fdtdec.c b/lib/fdtdec.c index 4defb90..adc9975 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -1014,7 +1014,7 @@ int fdt_get_named_resource(const void *fdt, int node, const char *property, { int index; - index = fdt_find_string(fdt, node, prop_names, name); + index = fdt_stringlist_search(fdt, node, prop_names, name); if (index < 0) return index; diff --git a/lib/libfdt/fdt_ro.c b/lib/libfdt/fdt_ro.c index 005f267..e38aaa4 100644 --- a/lib/libfdt/fdt_ro.c +++ b/lib/libfdt/fdt_ro.c @@ -538,80 +538,104 @@ int fdt_stringlist_contains(const char *strlist, int listlen, const char *str) return 0; } -int fdt_count_strings(const void *fdt, int node, const char *property) +int fdt_stringlist_count(const void *fdt, int nodeoffset, const char *property) { - int length, i, count = 0; - const char *list; + const char *list, *end; + int length, count = 0; - list = fdt_getprop(fdt, node, property, &length); + list = fdt_getprop(fdt, nodeoffset, property, &length); if (!list) - return length; + return -length; + + end = list + length; + + while (list < end) { + length = strnlen(list, end - list) + 1; - for (i = 0; i < length; i++) { - int len = strlen(list); + /* Abort if the last string isn't properly NUL-terminated. */ + if (list + length > end) + return -FDT_ERR_BADVALUE; - list += len + 1; - i += len; + list += length; count++; } return count; } -int fdt_find_string(const void *fdt, int node, const char *property, - const char *string) +int fdt_stringlist_search(const void *fdt, int nodeoffset, const char *property, + const char *string) { + int length, len, idx = 0; const char *list, *end; - int len, index = 0; - list = fdt_getprop(fdt, node, property, &len); + list = fdt_getprop(fdt, nodeoffset, property, &length); if (!list) - return len; + return -length; - end = list + len; - len = strlen(string); + len = strlen(string) + 1; + end = list + length; while (list < end) { - int l = strlen(list); + length = strnlen(list, end - list) + 1; + + /* Abort if the last string isn't properly NUL-terminated. */ + if (list + length > end) + return -FDT_ERR_BADVALUE; - if (l == len && memcmp(list, string, len) == 0) - return index; + if (length == len && memcmp(list, string, length) == 0) + return idx; - list += l + 1; - index++; + list += length; + idx++; } return -FDT_ERR_NOTFOUND; } -int fdt_get_string_index(const void *fdt, int node, const char *property, - int index, const char **output) +const char *fdt_stringlist_get(const void *fdt, int nodeoffset, + const char *property, int idx, + int *lenp) { - const char *list; - int length, i; + const char *list, *end; + int length; + + list = fdt_getprop(fdt, nodeoffset, property, &length); + if (!list) { + if (lenp) + *lenp = length; - list = fdt_getprop(fdt, node, property, &length); + return NULL; + } - for (i = 0; i < length; i++) { - int len = strlen(list); + end = list + length; - if (index == 0) { - *output = list; - return 0; + while (list < end) { + length = strnlen(list, end - list) + 1; + + /* Abort if the last string isn't properly NUL-terminated. */ + if (list + length > end) { + if (lenp) + *lenp = -FDT_ERR_BADVALUE; + + return NULL; + } + + if (idx == 0) { + if (lenp) + *lenp = length - 1; + + return list; } - list += len + 1; - i += len; - index--; + list += length; + idx--; } - return -FDT_ERR_NOTFOUND; -} + if (lenp) + *lenp = -FDT_ERR_NOTFOUND; -int fdt_get_string(const void *fdt, int node, const char *property, - const char **output) -{ - return fdt_get_string_index(fdt, node, property, 0, output); + return NULL; } int fdt_node_check_compatible(const void *fdt, int nodeoffset, diff --git a/test/overlay/cmd_ut_overlay.c b/test/overlay/cmd_ut_overlay.c index 87dc932..cbef720 100644 --- a/test/overlay/cmd_ut_overlay.c +++ b/test/overlay/cmd_ut_overlay.c @@ -52,12 +52,15 @@ static int fdt_getprop_str(void *fdt, const char *path, const char *name, const char **out) { int node_off; + int len; node_off = fdt_path_offset(fdt, path); if (node_off < 0) return node_off; - return fdt_get_string(fdt, node_off, name, out); + *out = fdt_stringlist_get(fdt, node_off, name, 0, &len); + + return len < 0 ? len : 0; } static int fdt_overlay_change_int_property(struct unit_test_state *uts)