From c27f813900a3c114562efbb8df1065e94766fc48 Mon Sep 17 00:00:00 2001 From: The Android Open Source Project Date: Tue, 10 Feb 2009 15:43:59 -0800 Subject: auto import from //branches/cupcake/...@130745 --- loader.c | 197 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 187 insertions(+), 10 deletions(-) (limited to 'loader.c') diff --git a/loader.c b/loader.c index 606ca10..84ed123 100644 --- a/loader.c +++ b/loader.c @@ -21,14 +21,17 @@ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ -#include "vl.h" +#include "qemu-common.h" +#include "cpu.h" #include "disas.h" +#include "sysemu.h" +#include "uboot_image.h" /* return the size or -1 if error */ int get_image_size(const char *filename) { int fd, size; - fd = open(filename, O_BINARY | O_RDONLY | O_BINARY); + fd = open(filename, O_RDONLY | O_BINARY); if (fd < 0) return -1; size = lseek(fd, 0, SEEK_END); @@ -37,6 +40,7 @@ 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 +57,84 @@ 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); + 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 @@ -103,7 +185,7 @@ 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 +206,21 @@ 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; @@ -172,6 +258,7 @@ 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 +268,7 @@ 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 +277,16 @@ 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) + 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); @@ -219,11 +308,21 @@ int load_elf(const char *filename, int64_t virt_to_phys_addend, #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, virt_to_phys_addend, must_swab, pentry, + lowaddr, highaddr); } else { - ret = load_elf32(fd, virt_to_phys_addend, must_swab, pentry); + ret = load_elf32(fd, virt_to_phys_addend, must_swab, pentry, + lowaddr, highaddr); } close(fd); @@ -233,3 +332,81 @@ 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 +} + +/* Load a U-Boot image. */ +int load_uboot(const char *filename, target_ulong *ep, int *is_linux) +{ + + int fd; + int size; + uboot_image_header_t h; + uboot_image_header_t *hdr = &h; + uint8_t *data = NULL; + + 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 fail; + + bswap_uboot_header(hdr); + + if (hdr->ih_magic != IH_MAGIC) + goto fail; + + /* TODO: Implement Multi-File images. */ + if (hdr->ih_type == IH_TYPE_MULTI) { + fprintf(stderr, "Unable to load multi-file u-boot images\n"); + goto fail; + } + + /* TODO: Implement compressed images. */ + if (hdr->ih_comp != IH_COMP_NONE) { + fprintf(stderr, "Unable to load compressed u-boot images\n"); + goto fail; + } + + /* TODO: Check CPU type. */ + if (is_linux) { + if (hdr->ih_type == IH_TYPE_KERNEL && 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 fail; + + if (read(fd, data, hdr->ih_size) != hdr->ih_size) { + fprintf(stderr, "Error reading file\n"); + goto fail; + } + + cpu_physical_memory_write_rom(hdr->ih_load, data, hdr->ih_size); + + return hdr->ih_size; + +fail: + if (data) + qemu_free(data); + close(fd); + return -1; +} + -- cgit v1.1