/* * There is an ELF kernel and one or more ELF modules loaded. * We wish to start executing the kernel image, so make such * preparations as are required, and do so. */ static int elf32_exec(struct preloaded_file *fp) { struct file_metadata *md; Elf_Ehdr *ehdr; vm_offset_t entry, bootinfop, modulep, kernend; int boothowto, err, bootdev; if ((md = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL) return(EFTYPE); ehdr = (Elf_Ehdr *)&(md->md_data); err = bi_load(fp->f_args, &boothowto, &bootdev, &bootinfop, &modulep, &kernend); if (err != 0) return(err); entry = ehdr->e_entry & 0xffffff; printf("Start @ 0x%lx ...\n", entry); ldr_enter(fp->f_name); dev_cleanup(); __exec((void *)entry, boothowto, bootdev, 0, 0, 0, bootinfop, modulep, kernend); panic("exec returned"); }
static int elf64_exec(struct preloaded_file *fp) { struct file_metadata *md; Elf_Ehdr *hdr; pt_entry_t pte; uint64_t bi_addr; md = file_findmetadata(fp, MODINFOMD_ELFHDR); if (md == NULL) return (EINVAL); hdr = (Elf_Ehdr *)&(md->md_data); bi_load(fp, &bi_addr); printf("Entering %s at 0x%lx...\n", fp->f_name, hdr->e_entry); ldr_enter(fp->f_name); __asm __volatile("rsm psr.ic|psr.i;;"); __asm __volatile("srlz.i;;"); /* * Region 6 is direct mapped UC and region 7 is direct mapped * WC. The details of this is controlled by the Alt {I,D}TLB * handlers. Here we just make sure that they have the largest * possible page size to minimise TLB usage. */ ia64_set_rr(IA64_RR_BASE(6), (6 << 8) | (28 << 2)); ia64_set_rr(IA64_RR_BASE(7), (7 << 8) | (28 << 2)); pte = PTE_PRESENT | PTE_MA_WB | PTE_ACCESSED | PTE_DIRTY | PTE_PL_KERN | PTE_AR_RWX | PTE_ED; __asm __volatile("mov cr.ifa=%0" :: "r"(IA64_RR_BASE(7))); __asm __volatile("mov cr.itir=%0" :: "r"(28 << 2)); __asm __volatile("ptr.i %0,%1" :: "r"(IA64_RR_BASE(7)), "r"(28<<2)); __asm __volatile("ptr.d %0,%1" :: "r"(IA64_RR_BASE(7)), "r"(28<<2)); __asm __volatile("srlz.i;;"); __asm __volatile("itr.i itr[%0]=%1;;" :: "r"(0), "r"(pte)); __asm __volatile("srlz.i;;"); __asm __volatile("itr.d dtr[%0]=%1;;" :: "r"(0), "r"(pte)); __asm __volatile("srlz.i;;"); enter_kernel(hdr->e_entry, bi_addr); /* NOTREACHED */ return (0); }