diff options
| -rw-r--r-- | contrib/elf2dmp/qemu_elf.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/contrib/elf2dmp/qemu_elf.c b/contrib/elf2dmp/qemu_elf.c index b601b6d7ba..ebda60dcb8 100644 --- a/contrib/elf2dmp/qemu_elf.c +++ b/contrib/elf2dmp/qemu_elf.c @@ -118,6 +118,53 @@ static void exit_states(QEMU_Elf *qe) free(qe->state); } +static bool check_ehdr(QEMU_Elf *qe) +{ + Elf64_Ehdr *ehdr = qe->map; + + if (sizeof(Elf64_Ehdr) > qe->size) { + eprintf("Invalid input dump file size\n"); + return false; + } + + if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) { + eprintf("Invalid ELF signature, input file is not ELF\n"); + return false; + } + + if (ehdr->e_ident[EI_CLASS] != ELFCLASS64 || + ehdr->e_ident[EI_DATA] != ELFDATA2LSB) { + eprintf("Invalid ELF class or byte order, must be 64-bit LE\n"); + return false; + } + + if (ehdr->e_ident[EI_VERSION] != EV_CURRENT) { + eprintf("Invalid ELF version\n"); + return false; + } + + if (ehdr->e_machine != EM_X86_64) { + eprintf("Invalid input dump architecture, only x86_64 is supported\n"); + return false; + } + + if (ehdr->e_type != ET_CORE) { + eprintf("Invalid ELF type, must be core file\n"); + return false; + } + + /* + * ELF dump file must contain one PT_NOTE and at least one PT_LOAD to + * restore physical address space. + */ + if (ehdr->e_phnum < 2) { + eprintf("Invalid number of ELF program headers\n"); + return false; + } + + return true; +} + int QEMU_Elf_init(QEMU_Elf *qe, const char *filename) { GError *gerr = NULL; @@ -133,6 +180,12 @@ int QEMU_Elf_init(QEMU_Elf *qe, const char *filename) qe->map = g_mapped_file_get_contents(qe->gmf); qe->size = g_mapped_file_get_length(qe->gmf); + if (!check_ehdr(qe)) { + eprintf("Input file has the wrong format\n"); + err = 1; + goto out_unmap; + } + if (init_states(qe)) { eprintf("Failed to extract QEMU CPU states\n"); err = 1; |