/* * QEMU Executable loader * * Copyright (c) 2006 Fabrice Bellard * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * Gunzip functionality in this file is derived from u-boot: * * (C) Copyright 2008 Semihalf * * (C) Copyright 2000-2005 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "qemu-common.h" #include "disas.h" #include "sysemu.h" #include "uboot_image.h" #include <zlib.h> /* return the size or -1 if error */ int get_image_size(const char *filename) { int fd, size; fd = open(filename, O_RDONLY | O_BINARY); if (fd < 0) return -1; size = lseek(fd, 0, SEEK_END); close(fd); return size; } /* return the size or -1 if error */ /* deprecated, because caller does not specify buffer size! */ int load_image(const char *filename, uint8_t *addr) { int fd, size; fd = open(filename, O_RDONLY | O_BINARY); if (fd < 0) return -1; size = lseek(fd, 0, SEEK_END); lseek(fd, 0, SEEK_SET); if (read(fd, addr, size) != size) { close(fd); return -1; } close(fd); return size; } /* return the amount read, just like fread. 0 may mean error or eof */ int fread_targphys(target_phys_addr_t dst_addr, size_t nbytes, FILE *f) { uint8_t buf[4096]; target_phys_addr_t dst_begin = dst_addr; size_t want, did; while (nbytes) { want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes; did = fread(buf, 1, want, f); if (did != want) break; cpu_physical_memory_write_rom(dst_addr, buf, did); dst_addr += did; nbytes -= did; } return dst_addr - dst_begin; } /* returns 0 on error, 1 if ok */ int fread_targphys_ok(target_phys_addr_t dst_addr, size_t nbytes, FILE *f) { return fread_targphys(dst_addr, nbytes, f) == nbytes; } /* read()-like version */ int read_targphys(int fd, target_phys_addr_t dst_addr, size_t nbytes) { uint8_t buf[4096]; target_phys_addr_t dst_begin = dst_addr; size_t want, did; while (nbytes) { want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes; did = read(fd, buf, want); if (did != want) break; cpu_physical_memory_write_rom(dst_addr, buf, did); dst_addr += did; nbytes -= did; } return dst_addr - dst_begin; } /* return the size or -1 if error */ int load_image_targphys(const char *filename, target_phys_addr_t addr, int max_sz) { FILE *f; size_t got; f = fopen(filename, "rb"); if (!f) return -1; got = fread_targphys(addr, max_sz, f); if (ferror(f)) { fclose(f); return -1; } fclose(f); return got; } void pstrcpy_targphys(target_phys_addr_t dest, int buf_size, const char *source) { static const uint8_t nul_byte = 0; const char *nulp; if (buf_size <= 0) return; nulp = memchr(source, 0, buf_size); if (nulp) { cpu_physical_memory_write_rom(dest, (uint8_t *)source, (nulp - source) + 1); } else { cpu_physical_memory_write_rom(dest, (uint8_t *)source, buf_size - 1); cpu_physical_memory_write_rom(dest, &nul_byte, 1); } } /* A.OUT loader */ struct exec { uint32_t a_info; /* Use macros N_MAGIC, etc for access */ uint32_t a_text; /* length of text, in bytes */ uint32_t a_data; /* length of data, in bytes */ uint32_t a_bss; /* length of uninitialized data area, in bytes */ uint32_t a_syms; /* length of symbol table data in file, in bytes */ uint32_t a_entry; /* start address */ uint32_t a_trsize; /* length of relocation info for text, in bytes */ uint32_t a_drsize; /* length of relocation info for data, in bytes */ }; #ifdef BSWAP_NEEDED static void bswap_ahdr(struct exec *e) { bswap32s(&e->a_info); bswap32s(&e->a_text); bswap32s(&e->a_data); bswap32s(&e->a_bss); bswap32s(&e->a_syms); bswap32s(&e->a_entry); bswap32s(&e->a_trsize); bswap32s(&e->a_drsize); } #else #define bswap_ahdr(x) do { } while (0) #endif #define N_MAGIC(exec) ((exec).a_info & 0xffff) #define OMAGIC 0407 #define NMAGIC 0410 #define ZMAGIC 0413 #define QMAGIC 0314 #define _N_HDROFF(x) (1024 - sizeof (struct exec)) #define N_TXTOFF(x) \ (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : \ (N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec))) #define N_TXTADDR(x) (N_MAGIC(x) == QMAGIC ? TARGET_PAGE_SIZE : 0) #define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text) #define _N_SEGMENT_ROUND(x) (((x) + TARGET_PAGE_SIZE - 1) & ~(TARGET_PAGE_SIZE - 1)) #define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text) #define N_DATADDR(x) \ (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \ : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x)))) int load_aout(const char *filename, target_phys_addr_t addr, int max_sz) { int fd, size, ret; struct exec e; uint32_t magic; fd = open(filename, O_RDONLY | O_BINARY); if (fd < 0) return -1; size = read(fd, &e, sizeof(e)); if (size < 0) goto fail; bswap_ahdr(&e); magic = N_MAGIC(e); switch (magic) { case ZMAGIC: case QMAGIC: case OMAGIC: if (e.a_text + e.a_data > max_sz) goto fail; lseek(fd, N_TXTOFF(e), SEEK_SET); size = read_targphys(fd, addr, e.a_text + e.a_data); if (size < 0) goto fail; break; case NMAGIC: if (N_DATADDR(e) + e.a_data > max_sz) goto fail; lseek(fd, N_TXTOFF(e), SEEK_SET); size = read_targphys(fd, addr, e.a_text); if (size < 0) goto fail; ret = read_targphys(fd, addr + N_DATADDR(e), e.a_data); if (ret < 0) goto fail; size += ret; break; default: goto fail; } close(fd); return size; fail: close(fd); return -1; } /* ELF loader */ static void *load_at(int fd, int offset, int size) { void *ptr; if (lseek(fd, offset, SEEK_SET) < 0) return NULL; ptr = qemu_malloc(size); if (!ptr) return NULL; if (read(fd, ptr, size) != size) { qemu_free(ptr); return NULL; } return ptr; } #define ELF_CLASS ELFCLASS32 #include "elf.h" #define SZ 32 #define elf_word uint32_t #define elf_sword int32_t #define bswapSZs bswap32s #include "elf_ops.h" #undef elfhdr #undef elf_phdr #undef elf_shdr #undef elf_sym #undef elf_note #undef elf_word #undef elf_sword #undef bswapSZs #undef SZ #define elfhdr elf64_hdr #define elf_phdr elf64_phdr #define elf_note elf64_note #define elf_shdr elf64_shdr #define elf_sym elf64_sym #define elf_word uint64_t #define elf_sword int64_t #define bswapSZs bswap64s #define SZ 64 #include "elf_ops.h" /* return < 0 if error, otherwise the number of bytes loaded in memory */ int load_elf(const char *filename, int64_t address_offset, uint64_t *pentry, uint64_t *lowaddr, uint64_t *highaddr) { int fd, data_order, host_data_order, must_swab, ret; uint8_t e_ident[EI_NIDENT]; fd = open(filename, O_RDONLY | O_BINARY); if (fd < 0) { perror(filename); return -1; } if (read(fd, e_ident, sizeof(e_ident)) != sizeof(e_ident)) goto fail; if (e_ident[0] != ELFMAG0 || e_ident[1] != ELFMAG1 || e_ident[2] != ELFMAG2 || e_ident[3] != ELFMAG3) goto fail; #ifdef WORDS_BIGENDIAN data_order = ELFDATA2MSB; #else data_order = ELFDATA2LSB; #endif must_swab = data_order != e_ident[EI_DATA]; #ifdef TARGET_WORDS_BIGENDIAN host_data_order = ELFDATA2MSB; #else host_data_order = ELFDATA2LSB; #endif if (host_data_order != e_ident[EI_DATA]) return -1; lseek(fd, 0, SEEK_SET); if (e_ident[EI_CLASS] == ELFCLASS64) { ret = load_elf64(fd, address_offset, must_swab, pentry, lowaddr, highaddr); } else { ret = load_elf32(fd, address_offset, must_swab, pentry, lowaddr, highaddr); } close(fd); return ret; fail: close(fd); return -1; } static void bswap_uboot_header(uboot_image_header_t *hdr) { #ifndef WORDS_BIGENDIAN bswap32s(&hdr->ih_magic); bswap32s(&hdr->ih_hcrc); bswap32s(&hdr->ih_time); bswap32s(&hdr->ih_size); bswap32s(&hdr->ih_load); bswap32s(&hdr->ih_ep); bswap32s(&hdr->ih_dcrc); #endif } #define ZALLOC_ALIGNMENT 16 static void *zalloc(void *x, unsigned items, unsigned size) { void *p; size *= items; size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1); p = qemu_malloc(size); return (p); } static void zfree(void *x, void *addr, unsigned nb) { qemu_free(addr); } #define HEAD_CRC 2 #define EXTRA_FIELD 4 #define ORIG_NAME 8 #define COMMENT 0x10 #define RESERVED 0xe0 #define DEFLATED 8 /* This is the maximum in uboot, so if a uImage overflows this, it would * overflow on real hardware too. */ #define UBOOT_MAX_GUNZIP_BYTES 0x800000 static ssize_t gunzip(void *dst, size_t dstlen, uint8_t *src, size_t srclen) { z_stream s; ssize_t dstbytes; int r, i, flags; /* skip header */ i = 10; flags = src[3]; if (src[2] != DEFLATED || (flags & RESERVED) != 0) { puts ("Error: Bad gzipped data\n"); return -1; } if ((flags & EXTRA_FIELD) != 0) i = 12 + src[10] + (src[11] << 8); if ((flags & ORIG_NAME) != 0) while (src[i++] != 0) ; if ((flags & COMMENT) != 0) while (src[i++] != 0) ; if ((flags & HEAD_CRC) != 0) i += 2; if (i >= srclen) { puts ("Error: gunzip out of data in header\n"); return -1; } s.zalloc = zalloc; s.zfree = (free_func)zfree; r = inflateInit2(&s, -MAX_WBITS); if (r != Z_OK) { printf ("Error: inflateInit2() returned %d\n", r); return (-1); } s.next_in = src + i; s.avail_in = srclen - i; s.next_out = dst; s.avail_out = dstlen; r = inflate(&s, Z_FINISH); if (r != Z_OK && r != Z_STREAM_END) { printf ("Error: inflate() returned %d\n", r); return -1; } dstbytes = s.next_out - (unsigned char *) dst; inflateEnd(&s); return dstbytes; } /* Load a U-Boot image. */ int load_uimage(const char *filename, target_ulong *ep, target_ulong *loadaddr, int *is_linux) { int fd; int size; uboot_image_header_t h; uboot_image_header_t *hdr = &h; uint8_t *data = NULL; int ret = -1; fd = open(filename, O_RDONLY | O_BINARY); if (fd < 0) return -1; size = read(fd, hdr, sizeof(uboot_image_header_t)); if (size < 0) goto out; bswap_uboot_header(hdr); if (hdr->ih_magic != IH_MAGIC) goto out; /* TODO: Implement other image types. */ if (hdr->ih_type != IH_TYPE_KERNEL) { fprintf(stderr, "Can only load u-boot image type \"kernel\"\n"); goto out; } switch (hdr->ih_comp) { case IH_COMP_NONE: case IH_COMP_GZIP: break; default: fprintf(stderr, "Unable to load u-boot images with compression type %d\n", hdr->ih_comp); goto out; } /* TODO: Check CPU type. */ if (is_linux) { if (hdr->ih_os == IH_OS_LINUX) *is_linux = 1; else *is_linux = 0; } *ep = hdr->ih_ep; data = qemu_malloc(hdr->ih_size); if (!data) goto out; if (read(fd, data, hdr->ih_size) != hdr->ih_size) { fprintf(stderr, "Error reading file\n"); goto out; } if (hdr->ih_comp == IH_COMP_GZIP) { uint8_t *compressed_data; size_t max_bytes; ssize_t bytes; compressed_data = data; max_bytes = UBOOT_MAX_GUNZIP_BYTES; data = qemu_malloc(max_bytes); bytes = gunzip(data, max_bytes, compressed_data, hdr->ih_size); qemu_free(compressed_data); if (bytes < 0) { fprintf(stderr, "Unable to decompress gzipped image!\n"); goto out; } hdr->ih_size = bytes; } cpu_physical_memory_write_rom(hdr->ih_load, data, hdr->ih_size); if (loadaddr) *loadaddr = hdr->ih_load; ret = hdr->ih_size; out: if (data) qemu_free(data); close(fd); return ret; }