X-Git-Url: http://vcs.maemo.org/git/?a=blobdiff_plain;f=loader.c;h=5232ee12a71bcac747abaa084a2992cdb82addea;hb=HEAD;hp=3fa681dbb0c4fd93fec62336c03d42b98329d994;hpb=699e4642a9df17591e7586c91921fc3d6b31616e;p=qemu diff --git a/loader.c b/loader.c index 3fa681d..5232ee1 100644 --- a/loader.c +++ b/loader.c @@ -1,8 +1,8 @@ /* * 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 @@ -20,9 +20,35 @@ * 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 "vl.h" + +#include "qemu-common.h" #include "disas.h" +#include "sysemu.h" +#include "uboot_image.h" + +#include /* return the size or -1 if error */ int get_image_size(const char *filename) @@ -37,6 +63,7 @@ int get_image_size(const char *filename) } /* 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; @@ -53,6 +80,85 @@ int load_image(const char *filename, uint8_t *addr) 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); + + cpu_physical_memory_write_rom(dst_addr, buf, did); + dst_addr += did; + nbytes -= did; + if (did != want) + break; + } + 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 @@ -93,7 +199,6 @@ static void bswap_ahdr(struct exec *e) (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) @@ -103,7 +208,7 @@ static void bswap_ahdr(struct exec *e) : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x)))) -int load_aout(const char *filename, uint8_t *addr) +int load_aout(const char *filename, target_phys_addr_t addr, int max_sz) { int fd, size, ret; struct exec e; @@ -124,17 +229,21 @@ int load_aout(const char *filename, uint8_t *addr) 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(fd, addr, e.a_text + e.a_data); + 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(fd, addr, e.a_text); + size = read_targphys(fd, addr, e.a_text); if (size < 0) goto fail; - ret = read(fd, addr + N_DATADDR(e), e.a_data); + ret = read_targphys(fd, addr + N_DATADDR(e), e.a_data); if (ret < 0) goto fail; size += ret; @@ -157,8 +266,6 @@ static void *load_at(int fd, int offset, int size) 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; @@ -172,6 +279,7 @@ static void *load_at(int fd, int offset, int size) #define SZ 32 #define elf_word uint32_t +#define elf_sword int32_t #define bswapSZs bswap32s #include "elf_ops.h" @@ -181,6 +289,7 @@ static void *load_at(int fd, int offset, int size) #undef elf_sym #undef elf_note #undef elf_word +#undef elf_sword #undef bswapSZs #undef SZ #define elfhdr elf64_hdr @@ -189,15 +298,16 @@ static void *load_at(int fd, int offset, int size) #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 virt_to_phys_addend, - uint64_t *pentry) +int load_elf(const char *filename, int64_t address_offset, + uint64_t *pentry, uint64_t *lowaddr, uint64_t *highaddr) { - int fd, data_order, must_swab, ret; + int fd, data_order, host_data_order, must_swab, ret; uint8_t e_ident[EI_NIDENT]; fd = open(filename, O_RDONLY | O_BINARY); @@ -218,12 +328,22 @@ int load_elf(const char *filename, int64_t virt_to_phys_addend, 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, virt_to_phys_addend, must_swab, pentry); + ret = load_elf64(fd, address_offset, must_swab, pentry, + lowaddr, highaddr); } else { - ret = load_elf32(fd, virt_to_phys_addend, must_swab, pentry); + ret = load_elf32(fd, address_offset, must_swab, pentry, + lowaddr, highaddr); } close(fd); @@ -233,3 +353,190 @@ int load_elf(const char *filename, int64_t virt_to_phys_addend, 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 (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; +}