include/hw/loader.h

   1 #ifndef LOADER_H
   2 #define LOADER_H
   3 #include "hw/nvram/fw_cfg.h"
   4
   5 /* loader.c */
   6 /**
   7  * get_image_size: retrieve size of an image file
   8  * @filename: Path to the image file
   9  *
  10  * Returns the size of the image file on success, -1 otherwise.
  11  * On error, errno is also set as appropriate.
  12  */
  13 int64_t get_image_size(const char *filename);
  14 /**
  15  * load_image_size: load an image file into specified buffer
  16  * @filename: Path to the image file
  17  * @addr: Buffer to load image into
  18  * @size: Size of buffer in bytes
  19  *
  20  * Load an image file from disk into the specified buffer.
  21  * If the image is larger than the specified buffer, only
  22  * @size bytes are read (this is not considered an error).
  23  *
  24  * Prefer to use the GLib function g_file_get_contents() rather
  25  * than a "get_image_size()/g_malloc()/load_image_size()" sequence.
  26  *
  27  * Returns the number of bytes read, or -1 on error. On error,
  28  * errno is also set as appropriate.
  29  */
  30 ssize_t load_image_size(const char *filename, void *addr, size_t size);
  31
  32 /**load_image_targphys_as:
  33  * @filename: Path to the image file
  34  * @addr: Address to load the image to
  35  * @max_sz: The maximum size of the image to load
  36  * @as: The AddressSpace to load the ELF to. The value of address_space_memory
  37  *      is used if nothing is supplied here.
  38  *
  39  * Load a fixed image into memory.
  40  *
  41  * Returns the size of the loaded image on success, -1 otherwise.
  42  */
  43 ssize_t load_image_targphys_as(const char *filename,
  44                                hwaddr addr, uint64_t max_sz, AddressSpace *as);
  45
  46 /**load_targphys_hex_as:
  47  * @filename: Path to the .hex file
  48  * @entry: Store the entry point given by the .hex file
  49  * @as: The AddressSpace to load the .hex file to. The value of
  50  *      address_space_memory is used if nothing is supplied here.
  51  *
  52  * Load a fixed .hex file into memory.
  53  *
  54  * Returns the size of the loaded .hex file on success, -1 otherwise.
  55  */
  56 ssize_t load_targphys_hex_as(const char *filename, hwaddr *entry,
  57                              AddressSpace *as);
  58
  59 /** load_image_targphys:
  60  * Same as load_image_targphys_as(), but doesn't allow the caller to specify
  61  * an AddressSpace.
  62  */
  63 ssize_t load_image_targphys(const char *filename, hwaddr,
  64                             uint64_t max_sz);
  65
  66 /**
  67  * load_image_mr: load an image into a memory region
  68  * @filename: Path to the image file
  69  * @mr: Memory Region to load into
  70  *
  71  * Load the specified file into the memory region.
  72  * The file loaded is registered as a ROM, so its contents will be
  73  * reinstated whenever the system is reset.
  74  * If the file is larger than the memory region's size the call will fail.
  75  * Returns -1 on failure, or the size of the file.
  76  */
  77 ssize_t load_image_mr(const char *filename, MemoryRegion *mr);
  78
  79 /* This is the limit on the maximum uncompressed image size that
  80  * load_image_gzipped_buffer() and load_image_gzipped() will read. It prevents
  81  * g_malloc() in those functions from allocating a huge amount of memory.
  82  */
  83 #define LOAD_IMAGE_MAX_GUNZIP_BYTES (256 << 20)
  84
  85 ssize_t load_image_gzipped_buffer(const char *filename, uint64_t max_sz,
  86                                   uint8_t **buffer);
  87 ssize_t load_image_gzipped(const char *filename, hwaddr addr, uint64_t max_sz);
  88
  89 /**
  90  * unpack_efi_zboot_image:
  91  * @buffer: pointer to a variable holding the address of a buffer containing the
  92  *          image
  93  * @size: pointer to a variable holding the size of the buffer
  94  *
  95  * Check whether the buffer contains a EFI zboot image, and if it does, extract
  96  * the compressed payload and decompress it into a new buffer. If successful,
  97  * the old buffer is freed, and the *buffer and size variables pointed to by the
  98  * function arguments are updated to refer to the newly populated buffer.
  99  *
 100  * Returns 0 if the image could not be identified as a EFI zboot image.
 101  * Returns -1 if the buffer contents were identified as a EFI zboot image, but
 102  * unpacking failed for any reason.
 103  * Returns the size of the decompressed payload if decompression was performed
 104  * successfully.
 105  */
 106 ssize_t unpack_efi_zboot_image(uint8_t **buffer, int *size);
 107
 108 #define ELF_LOAD_FAILED       -1
 109 #define ELF_LOAD_NOT_ELF      -2
 110 #define ELF_LOAD_WRONG_ARCH   -3
 111 #define ELF_LOAD_WRONG_ENDIAN -4
 112 #define ELF_LOAD_TOO_BIG      -5
 113 const char *load_elf_strerror(ssize_t error);
 114
 115 /** load_elf_ram_sym:
 116  * @filename: Path of ELF file
 117  * @elf_note_fn: optional function to parse ELF Note type
 118  *               passed via @translate_opaque
 119  * @translate_fn: optional function to translate load addresses
 120  * @translate_opaque: opaque data passed to @translate_fn
 121  * @pentry: Populated with program entry point. Ignored if NULL.
 122  * @lowaddr: Populated with lowest loaded address. Ignored if NULL.
 123  * @highaddr: Populated with highest loaded address. Ignored if NULL.
 124  * @pflags: Populated with ELF processor-specific flags. Ignore if NULL.
 125  * @bigendian: Expected ELF endianness. 0 for LE otherwise BE
 126  * @elf_machine: Expected ELF machine type
 127  * @clear_lsb: Set to mask off LSB of addresses (Some architectures use
 128  *             this for non-address data)
 129  * @data_swab: Set to order of byte swapping for data. 0 for no swap, 1
 130  *             for swapping bytes within halfwords, 2 for bytes within
 131  *             words and 3 for within doublewords.
 132  * @as: The AddressSpace to load the ELF to. The value of address_space_memory
 133  *      is used if nothing is supplied here.
 134  * @load_rom : Load ELF binary as ROM
 135  * @sym_cb: Callback function for symbol table entries
 136  *
 137  * Load an ELF file's contents to the emulated system's address space.
 138  * Clients may optionally specify a callback to perform address
 139  * translations. @pentry, @lowaddr and @highaddr are optional pointers
 140  * which will be populated with various load information. @bigendian and
 141  * @elf_machine give the expected endianness and machine for the ELF the
 142  * load will fail if the target ELF does not match. Some architectures
 143  * have some architecture-specific behaviours that come into effect when
 144  * their particular values for @elf_machine are set.
 145  * If @elf_machine is EM_NONE then the machine type will be read from the
 146  * ELF header and no checks will be carried out against the machine type.
 147  */
 148 typedef void (*symbol_fn_t)(const char *st_name, int st_info,
 149                             uint64_t st_value, uint64_t st_size);
 150
 151 ssize_t load_elf_ram_sym(const char *filename,
 152                          uint64_t (*elf_note_fn)(void *, void *, bool),
 153                          uint64_t (*translate_fn)(void *, uint64_t),
 154                          void *translate_opaque, uint64_t *pentry,
 155                          uint64_t *lowaddr, uint64_t *highaddr,
 156                          uint32_t *pflags, int big_endian, int elf_machine,
 157                          int clear_lsb, int data_swab,
 158                          AddressSpace *as, bool load_rom, symbol_fn_t sym_cb);
 159
 160 /** load_elf_ram:
 161  * Same as load_elf_ram_sym(), but doesn't allow the caller to specify a
 162  * symbol callback function
 163  */
 164 ssize_t load_elf_ram(const char *filename,
 165                      uint64_t (*elf_note_fn)(void *, void *, bool),
 166                      uint64_t (*translate_fn)(void *, uint64_t),
 167                      void *translate_opaque, uint64_t *pentry,
 168                      uint64_t *lowaddr, uint64_t *highaddr, uint32_t *pflags,
 169                      int big_endian, int elf_machine, int clear_lsb,
 170                      int data_swab, AddressSpace *as, bool load_rom);
 171
 172 /** load_elf_as:
 173  * Same as load_elf_ram(), but always loads the elf as ROM
 174  */
 175 ssize_t load_elf_as(const char *filename,
 176                     uint64_t (*elf_note_fn)(void *, void *, bool),
 177                     uint64_t (*translate_fn)(void *, uint64_t),
 178                     void *translate_opaque, uint64_t *pentry, uint64_t *lowaddr,
 179                     uint64_t *highaddr, uint32_t *pflags, int big_endian,
 180                     int elf_machine, int clear_lsb, int data_swab,
 181                     AddressSpace *as);
 182
 183 /** load_elf:
 184  * Same as load_elf_as(), but doesn't allow the caller to specify an
 185  * AddressSpace.
 186  */
 187 ssize_t load_elf(const char *filename,
 188                  uint64_t (*elf_note_fn)(void *, void *, bool),
 189                  uint64_t (*translate_fn)(void *, uint64_t),
 190                  void *translate_opaque, uint64_t *pentry, uint64_t *lowaddr,
 191                  uint64_t *highaddr, uint32_t *pflags, int big_endian,
 192                  int elf_machine, int clear_lsb, int data_swab);
 193
 194 /** load_elf_hdr:
 195  * @filename: Path of ELF file
 196  * @hdr: Buffer to populate with header data. Header data will not be
 197  * filled if set to NULL.
 198  * @is64: Set to true if the ELF is 64bit. Ignored if set to NULL
 199  * @errp: Populated with an error in failure cases
 200  *
 201  * Inspect an ELF file's header. Read its full header contents into a
 202  * buffer and/or determine if the ELF is 64bit.
 203  */
 204 void load_elf_hdr(const char *filename, void *hdr, bool *is64, Error **errp);
 205
 206 ssize_t load_aout(const char *filename, hwaddr addr, int max_sz,
 207                   int bswap_needed, hwaddr target_page_size);
 208
 209 #define LOAD_UIMAGE_LOADADDR_INVALID (-1)
 210
 211 /** load_uimage_as:
 212  * @filename: Path of uimage file
 213  * @ep: Populated with program entry point. Ignored if NULL.
 214  * @loadaddr: load address if none specified in the image or when loading a
 215  *            ramdisk. Populated with the load address. Ignored if NULL or
 216  *            LOAD_UIMAGE_LOADADDR_INVALID (images which do not specify a load
 217  *            address will not be loadable).
 218  * @is_linux: Is set to true if the image loaded is Linux. Ignored if NULL.
 219  * @translate_fn: optional function to translate load addresses
 220  * @translate_opaque: opaque data passed to @translate_fn
 221  * @as: The AddressSpace to load the ELF to. The value of address_space_memory
 222  *      is used if nothing is supplied here.
 223  *
 224  * Loads a u-boot image into memory.
 225  *
 226  * Returns the size of the loaded image on success, -1 otherwise.
 227  */
 228 ssize_t load_uimage_as(const char *filename, hwaddr *ep,
 229                        hwaddr *loadaddr, int *is_linux,
 230                        uint64_t (*translate_fn)(void *, uint64_t),
 231                        void *translate_opaque, AddressSpace *as);
 232
 233 /** load_uimage:
 234  * Same as load_uimage_as(), but doesn't allow the caller to specify an
 235  * AddressSpace.
 236  */
 237 ssize_t load_uimage(const char *filename, hwaddr *ep,
 238                     hwaddr *loadaddr, int *is_linux,
 239                     uint64_t (*translate_fn)(void *, uint64_t),
 240                     void *translate_opaque);
 241
 242 /**
 243  * load_ramdisk_as:
 244  * @filename: Path to the ramdisk image
 245  * @addr: Memory address to load the ramdisk to
 246  * @max_sz: Maximum allowed ramdisk size (for non-u-boot ramdisks)
 247  * @as: The AddressSpace to load the ELF to. The value of address_space_memory
 248  *      is used if nothing is supplied here.
 249  *
 250  * Load a ramdisk image with U-Boot header to the specified memory
 251  * address.
 252  *
 253  * Returns the size of the loaded image on success, -1 otherwise.
 254  */
 255 ssize_t load_ramdisk_as(const char *filename, hwaddr addr, uint64_t max_sz,
 256                         AddressSpace *as);
 257
 258 /**
 259  * load_ramdisk:
 260  * Same as load_ramdisk_as(), but doesn't allow the caller to specify
 261  * an AddressSpace.
 262  */
 263 ssize_t load_ramdisk(const char *filename, hwaddr addr, uint64_t max_sz);
 264
 265 ssize_t gunzip(void *dst, size_t dstlen, uint8_t *src, size_t srclen);
 266
 267 ssize_t read_targphys(const char *name,
 268                       int fd, hwaddr dst_addr, size_t nbytes);
 269 void pstrcpy_targphys(const char *name,
 270                       hwaddr dest, int buf_size,
 271                       const char *source);
 272
 273 ssize_t rom_add_file(const char *file, const char *fw_dir,
 274                      hwaddr addr, int32_t bootindex,
 275                      bool has_option_rom, MemoryRegion *mr, AddressSpace *as);
 276 MemoryRegion *rom_add_blob(const char *name, const void *blob, size_t len,
 277                            size_t max_len, hwaddr addr,
 278                            const char *fw_file_name,
 279                            FWCfgCallback fw_callback,
 280                            void *callback_opaque, AddressSpace *as,
 281                            bool read_only);
 282 int rom_add_elf_program(const char *name, GMappedFile *mapped_file, void *data,
 283                         size_t datasize, size_t romsize, hwaddr addr,
 284                         AddressSpace *as);
 285 int rom_check_and_register_reset(void);
 286 void rom_set_fw(FWCfgState *f);
 287 void rom_set_order_override(int order);
 288 void rom_reset_order_override(void);
 289
 290 /**
 291  * rom_transaction_begin:
 292  *
 293  * Call this before of a series of rom_add_*() calls.  Call
 294  * rom_transaction_end() afterwards to commit or abort.  These functions are
 295  * useful for undoing a series of rom_add_*() calls if image file loading fails
 296  * partway through.
 297  */
 298 void rom_transaction_begin(void);
 299
 300 /**
 301  * rom_transaction_end:
 302  * @commit: true to commit added roms, false to drop added roms
 303  *
 304  * Call this after a series of rom_add_*() calls.  See rom_transaction_begin().
 305  */
 306 void rom_transaction_end(bool commit);
 307
 308 int rom_copy(uint8_t *dest, hwaddr addr, size_t size);
 309 void *rom_ptr(hwaddr addr, size_t size);
 310 /**
 311  * rom_ptr_for_as: Return a pointer to ROM blob data for the address
 312  * @as: AddressSpace to look for the ROM blob in
 313  * @addr: Address within @as
 314  * @size: size of data required in bytes
 315  *
 316  * Returns: pointer into the data which backs the matching ROM blob,
 317  * or NULL if no blob covers the address range.
 318  *
 319  * This function looks for a ROM blob which covers the specified range
 320  * of bytes of length @size starting at @addr within the address space
 321  * @as. This is useful for code which runs as part of board
 322  * initialization or CPU reset which wants to read data that is part
 323  * of a user-supplied guest image or other guest memory contents, but
 324  * which runs before the ROM loader's reset function has copied the
 325  * blobs into guest memory.
 326  *
 327  * rom_ptr_for_as() will look not just for blobs loaded directly to
 328  * the specified address, but also for blobs which were loaded to an
 329  * alias of the region at a different location in the AddressSpace.
 330  * In other words, if a machine model has RAM at address 0x0000_0000
 331  * which is aliased to also appear at 0x1000_0000, rom_ptr_for_as()
 332  * will return the correct data whether the guest image was linked and
 333  * loaded at 0x0000_0000 or 0x1000_0000.  Contrast rom_ptr(), which
 334  * will only return data if the image load address is an exact match
 335  * with the queried address.
 336  *
 337  * New code should prefer to use rom_ptr_for_as() instead of
 338  * rom_ptr().
 339  */
 340 void *rom_ptr_for_as(AddressSpace *as, hwaddr addr, size_t size);
 341 void hmp_info_roms(Monitor *mon, const QDict *qdict);
 342
 343 #define rom_add_file_fixed(_f, _a, _i)          \
 344     rom_add_file(_f, NULL, _a, _i, false, NULL, NULL)
 345 #define rom_add_blob_fixed(_f, _b, _l, _a)      \
 346     rom_add_blob(_f, _b, _l, _l, _a, NULL, NULL, NULL, NULL, true)
 347 #define rom_add_file_mr(_f, _mr, _i)            \
 348     rom_add_file(_f, NULL, 0, _i, false, _mr, NULL)
 349 #define rom_add_file_as(_f, _as, _i)            \
 350     rom_add_file(_f, NULL, 0, _i, false, NULL, _as)
 351 #define rom_add_file_fixed_as(_f, _a, _i, _as)          \
 352     rom_add_file(_f, NULL, _a, _i, false, NULL, _as)
 353 #define rom_add_blob_fixed_as(_f, _b, _l, _a, _as)      \
 354     rom_add_blob(_f, _b, _l, _l, _a, NULL, NULL, NULL, _as, true)
 355
 356 ssize_t rom_add_vga(const char *file);
 357 ssize_t rom_add_option(const char *file, int32_t bootindex);
 358
 359 /* This is the usual maximum in uboot, so if a uImage overflows this, it would
 360  * overflow on real hardware too. */
 361 #define UBOOT_MAX_GUNZIP_BYTES (64 << 20)
 362
 363 typedef struct RomGap {
 364     hwaddr base;
 365     size_t size;
 366 } RomGap;
 367
 368 /**
 369  * rom_find_largest_gap_between: return largest gap between ROMs in given range
 370  *
 371  * Given a range of addresses, this function finds the largest
 372  * contiguous subrange which has no ROMs loaded to it. That is,
 373  * it finds the biggest gap which is free for use for other things.
 374  */
 375 RomGap rom_find_largest_gap_between(hwaddr base, size_t size);
 376
 377 #endif