#include <errno.h>
#include <linux/list.h>
+#ifdef CONFIG_DM_RNG
+#include <dm.h>
+#include <rng.h>
+#endif
+
#include <splash.h>
#include <asm/io.h>
#define MAX_TFTP_PATH_LEN 512
+int pxe_get_file_size(ulong *sizep)
+{
+ const char *val;
+
+ val = from_env("filesize");
+ if (!val)
+ return -ENOENT;
+
+ if (strict_strtoul(val, 16, sizep) < 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+/**
+ * format_mac_pxe() - obtain a MAC address in the PXE format
+ *
+ * This produces a MAC-address string in the format for the current ethernet
+ * device:
+ *
+ * 01-aa-bb-cc-dd-ee-ff
+ *
+ * where aa-ff is the MAC address in hex
+ *
+ * @outbuf: Buffer to write string to
+ * @outbuf_len: length of buffer
+ * Return: 1 if OK, -ENOSPC if buffer is too small, -ENOENT is there is no
+ * current ethernet device
+ */
int format_mac_pxe(char *outbuf, size_t outbuf_len)
{
uchar ethaddr[6];
if (outbuf_len < 21) {
printf("outbuf is too small (%zd < 21)\n", outbuf_len);
-
- return -EINVAL;
+ return -ENOSPC;
}
if (!eth_env_get_enetaddr_by_index("eth", eth_get_dev_index(), ethaddr))
return 1;
}
-/*
- * Returns the directory the file specified in the bootfile env variable is
- * in. If bootfile isn't defined in the environment, return NULL, which should
- * be interpreted as "don't prepend anything to paths".
- */
-static int get_bootfile_path(const char *file_path, char *bootfile_path,
- size_t bootfile_path_size, bool allow_abs_path)
-{
- char *bootfile, *last_slash;
- size_t path_len = 0;
-
- /* Only syslinux allows absolute paths */
- if (file_path[0] == '/' && allow_abs_path)
- goto ret;
-
- bootfile = from_env("bootfile");
-
- if (!bootfile)
- goto ret;
-
- last_slash = strrchr(bootfile, '/');
-
- if (!last_slash)
- goto ret;
-
- path_len = (last_slash - bootfile) + 1;
-
- if (bootfile_path_size < path_len) {
- printf("bootfile_path too small. (%zd < %zd)\n",
- bootfile_path_size, path_len);
-
- return -1;
- }
-
- strncpy(bootfile_path, bootfile, path_len);
-
- ret:
- bootfile_path[path_len] = '\0';
-
- return 1;
-}
-
-/*
+/**
+ * get_relfile() - read a file relative to the PXE file
+ *
* As in pxelinux, paths to files referenced from files we retrieve are
* relative to the location of bootfile. get_relfile takes such a path and
* joins it with the bootfile path to get the full path to the target file. If
* the bootfile path is NULL, we use file_path as is.
*
- * Returns 1 for success, or < 0 on error.
+ * @ctx: PXE context
+ * @file_path: File path to read (relative to the PXE file)
+ * @file_addr: Address to load file to
+ * @filesizep: If not NULL, returns the file size in bytes
+ * Returns 1 for success, or < 0 on error
*/
static int get_relfile(struct pxe_context *ctx, const char *file_path,
- unsigned long file_addr)
+ unsigned long file_addr, ulong *filesizep)
{
size_t path_len;
char relfile[MAX_TFTP_PATH_LEN + 1];
char addr_buf[18];
- int err;
-
- err = get_bootfile_path(file_path, relfile, sizeof(relfile),
- ctx->allow_abs_path);
+ ulong size;
+ int ret;
- if (err < 0)
- return err;
+ if (file_path[0] == '/' && ctx->allow_abs_path)
+ *relfile = '\0';
+ else
+ strncpy(relfile, ctx->bootdir, MAX_TFTP_PATH_LEN);
- path_len = strlen(file_path);
- path_len += strlen(relfile);
+ path_len = strlen(file_path) + strlen(relfile);
if (path_len > MAX_TFTP_PATH_LEN) {
printf("Base path too long (%s%s)\n", relfile, file_path);
sprintf(addr_buf, "%lx", file_addr);
- return ctx->getfile(ctx, relfile, addr_buf);
+ ret = ctx->getfile(ctx, relfile, addr_buf, &size);
+ if (ret < 0)
+ return log_msg_ret("get", ret);
+ if (filesizep)
+ *filesizep = size;
+
+ return 1;
}
+/**
+ * get_pxe_file() - read a file
+ *
+ * The file is read and nul-terminated
+ *
+ * @ctx: PXE context
+ * @file_path: File path to read (relative to the PXE file)
+ * @file_addr: Address to load file to
+ * Returns 1 for success, or < 0 on error
+ */
int get_pxe_file(struct pxe_context *ctx, const char *file_path,
- unsigned long file_addr)
+ ulong file_addr)
{
- unsigned long config_file_size;
- char *tftp_filesize;
+ ulong size;
int err;
char *buf;
- err = get_relfile(ctx, file_path, file_addr);
-
+ err = get_relfile(ctx, file_path, file_addr, &size);
if (err < 0)
return err;
- /*
- * the file comes without a NUL byte at the end, so find out its size
- * and add the NUL byte.
- */
- tftp_filesize = from_env("filesize");
-
- if (!tftp_filesize)
- return -ENOENT;
-
- if (strict_strtoul(tftp_filesize, 16, &config_file_size) < 0)
- return -EINVAL;
-
- buf = map_sysmem(file_addr + config_file_size, 1);
+ buf = map_sysmem(file_addr + size, 1);
*buf = '\0';
unmap_sysmem(buf);
#define PXELINUX_DIR "pxelinux.cfg/"
+/**
+ * get_pxelinux_path() - Get a file in the pxelinux.cfg/ directory
+ *
+ * @ctx: PXE context
+ * @file: Filename to process (relative to pxelinux.cfg/)
+ * Returns 1 for success, -ENAMETOOLONG if the resulting path is too long.
+ * or other value < 0 on other error
+ */
int get_pxelinux_path(struct pxe_context *ctx, const char *file,
unsigned long pxefile_addr_r)
{
return get_pxe_file(ctx, path, pxefile_addr_r);
}
-/*
+/**
+ * get_relfile_envaddr() - read a file to an address in an env var
+ *
* Wrapper to make it easier to store the file at file_path in the location
* specified by envaddr_name. file_path will be joined to the bootfile path,
* if any is specified.
*
- * Returns 1 on success or < 0 on error.
+ * @ctx: PXE context
+ * @file_path: File path to read (relative to the PXE file)
+ * @envaddr_name: Name of environment variable which contains the address to
+ * load to
+ * @filesizep: Returns the file size in bytes
+ * Returns 1 on success, -ENOENT if @envaddr_name does not exist as an
+ * environment variable, -EINVAL if its format is not valid hex, or other
+ * value < 0 on other error
*/
static int get_relfile_envaddr(struct pxe_context *ctx, const char *file_path,
- const char *envaddr_name)
+ const char *envaddr_name, ulong *filesizep)
{
unsigned long file_addr;
char *envaddr;
envaddr = from_env(envaddr_name);
-
if (!envaddr)
return -ENOENT;
if (strict_strtoul(envaddr, 16, &file_addr) < 0)
return -EINVAL;
- return get_relfile(ctx, file_path, file_addr);
+ return get_relfile(ctx, file_path, file_addr, filesizep);
}
-/*
+/**
+ * label_create() - crate a new PXE label
+ *
* Allocates memory for and initializes a pxe_label. This uses malloc, so the
* result must be free()'d to reclaim the memory.
*
- * Returns NULL if malloc fails.
+ * Returns a pointer to the label, or NULL if out of memory
*/
static struct pxe_label *label_create(void)
{
struct pxe_label *label;
label = malloc(sizeof(struct pxe_label));
-
if (!label)
return NULL;
return label;
}
-/*
- * Free the memory used by a pxe_label, including that used by its name,
- * kernel, append and initrd members, if they're non NULL.
+/**
+ * label_destroy() - free the memory used by a pxe_label
+ *
+ * This frees @label itself as well as memory used by its name,
+ * kernel, config, append, initrd, fdt, fdtdir and fdtoverlay members, if
+ * they're non-NULL.
*
* So - be sure to only use dynamically allocated memory for the members of
* the pxe_label struct, unless you want to clean it up first. These are
* currently only created by the pxe file parsing code.
+ *
+ * @label: Label to free
*/
static void label_destroy(struct pxe_label *label)
{
- if (label->name)
- free(label->name);
-
- if (label->kernel)
- free(label->kernel);
-
- if (label->config)
- free(label->config);
-
- if (label->append)
- free(label->append);
-
- if (label->initrd)
- free(label->initrd);
-
- if (label->fdt)
- free(label->fdt);
-
- if (label->fdtdir)
- free(label->fdtdir);
-
- if (label->fdtoverlays)
- free(label->fdtoverlays);
-
+ free(label->name);
+ free(label->kernel);
+ free(label->config);
+ free(label->append);
+ free(label->initrd);
+ free(label->fdt);
+ free(label->fdtdir);
+ free(label->fdtoverlays);
free(label);
}
-/*
- * Print a label and its string members if they're defined.
+/**
+ * label_print() - Print a label and its string members if they're defined
*
* This is passed as a callback to the menu code for displaying each
* menu entry.
+ *
+ * @data: Label to print (is cast to struct pxe_label *)
*/
static void label_print(void *data)
{
printf("%s:\t%s\n", label->num, c);
}
-/*
- * Boot a label that specified 'localboot'. This requires that the 'localcmd'
- * environment variable is defined. Its contents will be executed as U-Boot
- * command. If the label specified an 'append' line, its contents will be
- * used to overwrite the contents of the 'bootargs' environment variable prior
- * to running 'localcmd'.
+/**
+ * label_localboot() - Boot a label that specified 'localboot'
+ *
+ * This requires that the 'localcmd' environment variable is defined. Its
+ * contents will be executed as U-Boot commands. If the label specified an
+ * 'append' line, its contents will be used to overwrite the contents of the
+ * 'bootargs' environment variable prior to running 'localcmd'.
*
- * Returns 1 on success or < 0 on error.
+ * @label: Label to process
+ * Returns 1 on success or < 0 on error
*/
static int label_localboot(struct pxe_label *label)
{
char *localcmd;
localcmd = from_env("localcmd");
-
if (!localcmd)
return -ENOENT;
}
/*
- * Loads fdt overlays specified in 'fdtoverlays'.
+ * label_boot_kaslrseed generate kaslrseed from hw rng
+ */
+
+static void label_boot_kaslrseed(void)
+{
+#ifdef CONFIG_DM_RNG
+ ulong fdt_addr;
+ struct fdt_header *working_fdt;
+ size_t n = 0x8;
+ struct udevice *dev;
+ u64 *buf;
+ int nodeoffset;
+ int err;
+
+ /* Get the main fdt and map it */
+ fdt_addr = hextoul(env_get("fdt_addr_r"), NULL);
+ working_fdt = map_sysmem(fdt_addr, 0);
+ err = fdt_check_header(working_fdt);
+ if (err)
+ return;
+
+ /* add extra size for holding kaslr-seed */
+ /* err is new fdt size, 0 or negtive */
+ err = fdt_shrink_to_minimum(working_fdt, 512);
+ if (err <= 0)
+ return;
+
+ if (uclass_get_device(UCLASS_RNG, 0, &dev) || !dev) {
+ printf("No RNG device\n");
+ return;
+ }
+
+ nodeoffset = fdt_find_or_add_subnode(working_fdt, 0, "chosen");
+ if (nodeoffset < 0) {
+ printf("Reading chosen node failed\n");
+ return;
+ }
+
+ buf = malloc(n);
+ if (!buf) {
+ printf("Out of memory\n");
+ return;
+ }
+
+ if (dm_rng_read(dev, buf, n)) {
+ printf("Reading RNG failed\n");
+ goto err;
+ }
+
+ err = fdt_setprop(working_fdt, nodeoffset, "kaslr-seed", buf, sizeof(buf));
+ if (err < 0) {
+ printf("Unable to set kaslr-seed on chosen node: %s\n", fdt_strerror(err));
+ goto err;
+ }
+err:
+ free(buf);
+#endif
+ return;
+}
+
+/**
+ * label_boot_fdtoverlay() - Loads fdt overlays specified in 'fdtoverlays'
+ *
+ * @ctx: PXE context
+ * @label: Label to process
*/
#ifdef CONFIG_OF_LIBFDT_OVERLAY
static void label_boot_fdtoverlay(struct pxe_context *ctx,
goto skip_overlay;
/* Load overlay file */
- err = get_relfile_envaddr(ctx, overlayfile,
- "fdtoverlay_addr_r");
+ err = get_relfile_envaddr(ctx, overlayfile, "fdtoverlay_addr_r",
+ NULL);
if (err < 0) {
printf("Failed loading overlay %s\n", overlayfile);
goto skip_overlay;
}
#endif
-/*
- * Boot according to the contents of a pxe_label.
+/**
+ * label_boot() - Boot according to the contents of a pxe_label
*
* If we can't boot for any reason, we return. A successful boot never
* returns.
*
* If the label specifies an 'append' line, its contents will overwrite that
* of the 'bootargs' environment variable.
+ *
+ * @ctx: PXE context
+ * @label: Label to process
+ * Returns does not return on success, otherwise returns 0 if a localboot
+ * label was processed, or 1 on error
*/
static int label_boot(struct pxe_context *ctx, struct pxe_label *label)
{
}
if (label->initrd) {
- if (get_relfile_envaddr(ctx, label->initrd, "ramdisk_addr_r") < 0) {
+ ulong size;
+
+ if (get_relfile_envaddr(ctx, label->initrd, "ramdisk_addr_r",
+ &size) < 0) {
printf("Skipping %s for failure retrieving initrd\n",
label->name);
return 1;
}
initrd_addr_str = env_get("ramdisk_addr_r");
- strncpy(initrd_filesize, env_get("filesize"), 9);
+ strcpy(initrd_filesize, simple_xtoa(size));
strncpy(initrd_str, initrd_addr_str, 18);
strcat(initrd_str, ":");
strncat(initrd_str, initrd_filesize, 9);
}
- if (get_relfile_envaddr(ctx, label->kernel, "kernel_addr_r") < 0) {
+ if (get_relfile_envaddr(ctx, label->kernel, "kernel_addr_r",
+ NULL) < 0) {
printf("Skipping %s for failure retrieving kernel\n",
label->name);
return 1;
* Scenario 2: If there is an fdt_addr specified, pass it along to
* bootm, and adjust argc appropriately.
*
- * Scenario 3: fdt blob is not available.
+ * Scenario 3: If there is an fdtcontroladdr specified, pass it along to
+ * bootm, and adjust argc appropriately.
+ *
+ * Scenario 4: fdt blob is not available.
*/
bootm_argv[3] = env_get("fdt_addr_r");
if (fdtfile) {
int err = get_relfile_envaddr(ctx, fdtfile,
- "fdt_addr_r");
+ "fdt_addr_r", NULL);
free(fdtfilefree);
if (err < 0) {
}
}
+ if (label->kaslrseed)
+ label_boot_kaslrseed();
+
#ifdef CONFIG_OF_LIBFDT_OVERLAY
if (label->fdtoverlays)
label_boot_fdtoverlay(ctx, label);
if (!bootm_argv[3])
bootm_argv[3] = env_get("fdt_addr");
+ if (!bootm_argv[3])
+ bootm_argv[3] = env_get("fdtcontroladdr");
+
if (bootm_argv[3]) {
if (!bootm_argv[2])
bootm_argv[2] = "-";
unmap_sysmem(buf);
cleanup:
- if (fit_addr)
- free(fit_addr);
+ free(fit_addr);
+
return 1;
}
-/*
- * Tokens for the pxe file parser.
- */
+/** enum token_type - Tokens for the pxe file parser */
enum token_type {
T_EOL,
T_STRING,
T_ONTIMEOUT,
T_IPAPPEND,
T_BACKGROUND,
+ T_KASLRSEED,
T_INVALID
};
-/*
- * A token - given by a value and a type.
- */
+/** struct token - token - given by a value and a type */
struct token {
char *val;
enum token_type type;
};
-/*
- * Keywords recognized.
- */
+/* Keywords recognized */
static const struct token keywords[] = {
{"menu", T_MENU},
{"title", T_TITLE},
{"ontimeout", T_ONTIMEOUT,},
{"ipappend", T_IPAPPEND,},
{"background", T_BACKGROUND,},
+ {"kaslrseed", T_KASLRSEED,},
{NULL, T_INVALID}
};
-/*
+/**
+ * enum lex_state - lexer state
+ *
* Since pxe(linux) files don't have a token to identify the start of a
* literal, we have to keep track of when we're in a state where a literal is
* expected vs when we're in a state a keyword is expected.
L_SLITERAL
};
-/*
- * get_string retrieves a string from *p and stores it as a token in
- * *t.
+/**
+ * get_string() - retrieves a string from *p and stores it as a token in *t.
*
- * get_string used for scanning both string literals and keywords.
+ * This is used for scanning both string literals and keywords.
*
* Characters from *p are copied into t-val until a character equal to
* delim is found, or a NUL byte is reached. If delim has the special value of
* The location of *p is updated to point to the first character after the end
* of the token - the ending delimiter.
*
- * On success, the new value of t->val is returned. Memory for t->val is
- * allocated using malloc and must be free()'d to reclaim it. If insufficient
- * memory is available, NULL is returned.
+ * Memory for t->val is allocated using malloc and must be free()'d to reclaim
+ * it.
+ *
+ * @p: Points to a pointer to the current position in the input being processed.
+ * Updated to point at the first character after the current token
+ * @t: Pointers to a token to fill in
+ * @delim: Delimiter character to look for, either newline or space
+ * @lower: true to convert the string to lower case when storing
+ * Returns the new value of t->val, on success, NULL if out of memory
*/
static char *get_string(char **p, struct token *t, char delim, int lower)
{
*/
b = *p;
e = *p;
-
while (*e) {
if ((delim == ' ' && isspace(*e)) || delim == *e)
break;
t->val[len] = '\0';
- /*
- * Update *p so the caller knows where to continue scanning.
- */
+ /* Update *p so the caller knows where to continue scanning */
*p = e;
-
t->type = T_STRING;
return t->val;
}
-/*
- * Populate a keyword token with a type and value.
+/**
+ * get_keyword() - Populate a keyword token with a type and value
+ *
+ * Updates the ->type field based on the keyword string in @val
+ * @t: Token to populate
*/
static void get_keyword(struct token *t)
{
}
}
-/*
- * Get the next token. We have to keep track of which state we're in to know
- * if we're looking to get a string literal or a keyword.
+/**
+ * get_token() - Get the next token
+ *
+ * We have to keep track of which state we're in to know if we're looking to get
+ * a string literal or a keyword.
*
- * *p is updated to point at the first character after the current token.
+ * @p: Points to a pointer to the current position in the input being processed.
+ * Updated to point at the first character after the current token
*/
static void get_token(char **p, struct token *t, enum lex_state state)
{
*p = c;
}
-/*
- * Increment *c until we get to the end of the current line, or EOF.
+/**
+ * eol_or_eof() - Find end of line
+ *
+ * Increment *c until we get to the end of the current line, or EOF
+ *
+ * @c: Points to a pointer to the current position in the input being processed.
+ * Updated to point at the first character after the current token
*/
static void eol_or_eof(char **c)
{
char *s = *c;
get_token(c, &t, L_SLITERAL);
-
if (t.type != T_STRING) {
printf("Expected string: %.*s\n", (int)(*c - s), s);
return -EINVAL;
int ret;
err = parse_sliteral(c, &include_path);
-
if (err < 0) {
printf("Expected include path: %.*s\n", (int)(*c - s), s);
return err;
}
err = get_pxe_file(ctx, include_path, base);
-
if (err < 0) {
printf("Couldn't retrieve %s\n", include_path);
return err;
printf("Ignoring malformed menu command: %.*s\n",
(int)(*c - s), s);
}
-
if (err < 0)
return err;
err = parse_integer(c, &label->ipappend);
break;
+ case T_KASLRSEED:
+ label->kaslrseed = 1;
+ break;
+
case T_EOL:
break;
struct list_head *pos, *n;
struct pxe_label *label;
- if (cfg->title)
- free(cfg->title);
-
- if (cfg->default_label)
- free(cfg->default_label);
+ free(cfg->title);
+ free(cfg->default_label);
list_for_each_safe(pos, n, &cfg->labels) {
label = list_entry(pos, struct pxe_label, list);
int r;
cfg = malloc(sizeof(struct pxe_menu));
-
if (!cfg)
return NULL;
buf = map_sysmem(menucfg, 0);
r = parse_pxefile_top(ctx, buf, menucfg, cfg, 1);
unmap_sysmem(buf);
-
if (r < 0) {
destroy_pxe_menu(cfg);
return NULL;
struct pxe_label *label;
struct list_head *pos;
struct menu *m;
+ char *label_override;
int err;
int i = 1;
char *default_num = NULL;
+ char *override_num = NULL;
/*
* Create a menu and add items for all the labels.
*/
m = menu_create(cfg->title, DIV_ROUND_UP(cfg->timeout, 10),
cfg->prompt, NULL, label_print, NULL, NULL);
-
if (!m)
return NULL;
+ label_override = env_get("pxe_label_override");
+
list_for_each(pos, &cfg->labels) {
label = list_entry(pos, struct pxe_label, list);
if (cfg->default_label &&
(strcmp(label->name, cfg->default_label) == 0))
default_num = label->num;
+ if (label_override && !strcmp(label->name, label_override))
+ override_num = label->num;
+ }
+
+
+ if (label_override) {
+ if (override_num)
+ default_num = override_num;
+ else
+ printf("Missing override pxe label: %s\n",
+ label_override);
}
/*
if (IS_ENABLED(CONFIG_CMD_BMP)) {
/* display BMP if available */
if (cfg->bmp) {
- if (get_relfile(ctx, cfg->bmp, image_load_addr)) {
+ if (get_relfile(ctx, cfg->bmp, image_load_addr, NULL)) {
if (CONFIG_IS_ENABLED(CMD_CLS))
run_command("cls", 0);
bmp_display(image_load_addr,
return;
err = menu_get_choice(m, &choice);
-
menu_destroy(m);
/*
boot_unattempted_labels(ctx, cfg);
}
-void pxe_setup_ctx(struct pxe_context *ctx, struct cmd_tbl *cmdtp,
- pxe_getfile_func getfile, void *userdata,
- bool allow_abs_path)
+int pxe_setup_ctx(struct pxe_context *ctx, struct cmd_tbl *cmdtp,
+ pxe_getfile_func getfile, void *userdata,
+ bool allow_abs_path, const char *bootfile)
{
+ const char *last_slash;
+ size_t path_len = 0;
+
+ memset(ctx, '\0', sizeof(*ctx));
ctx->cmdtp = cmdtp;
ctx->getfile = getfile;
ctx->userdata = userdata;
ctx->allow_abs_path = allow_abs_path;
+
+ /* figure out the boot directory, if there is one */
+ if (bootfile && strlen(bootfile) >= MAX_TFTP_PATH_LEN)
+ return -ENOSPC;
+ ctx->bootdir = strdup(bootfile ? bootfile : "");
+ if (!ctx->bootdir)
+ return -ENOMEM;
+
+ if (bootfile) {
+ last_slash = strrchr(bootfile, '/');
+ if (last_slash)
+ path_len = (last_slash - bootfile) + 1;
+ }
+ ctx->bootdir[path_len] = '\0';
+
+ return 0;
+}
+
+void pxe_destroy_ctx(struct pxe_context *ctx)
+{
+ free(ctx->bootdir);
+}
+
+int pxe_process(struct pxe_context *ctx, ulong pxefile_addr_r, bool prompt)
+{
+ struct pxe_menu *cfg;
+
+ cfg = parse_pxefile(ctx, pxefile_addr_r);
+ if (!cfg) {
+ printf("Error parsing config file\n");
+ return 1;
+ }
+
+ if (prompt)
+ cfg->prompt = 1;
+
+ handle_pxe_menu(ctx, cfg);
+
+ destroy_pxe_menu(cfg);
+
+ return 0;
}
projects / platform / kernel / u-boot.git / blobdiff