/* $Id: elf_freebsd.c,v 1.3 1998/09/14 18:27:00 msmith Exp $ */ /* $NetBSD: loadfile.c,v 1.10 1998/06/25 06:45:46 ross Exp $ */ /*- * Copyright (c) 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Ralph Campbell. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)boot.c 8.1 (Berkeley) 6/10/93 */ #include #include #include #include #include #include #include #include #include "bootstrap.h" #define _KERNEL static int elf_loadmodule(char *filename, vm_offset_t dest, struct loaded_module **result); static int elf_exec(struct loaded_module *amp); static int elf_load(int fd, Elf_Ehdr *elf, vm_offset_t dest); struct module_format alpha_elf = { elf_loadmodule, elf_exec }; vm_offset_t ffp_save, ptbr_save; vm_offset_t ssym, esym; static int elf_loadmodule(char *filename, vm_offset_t dest, struct loaded_module **result) { struct loaded_module *mp; Elf_Ehdr hdr; ssize_t nr; int fd, rval; /* Open the file. */ rval = 1; if ((fd = open(filename, 0)) < 0) { (void)printf("open %s: %s\n", filename, strerror(errno)); goto err; } /* Read the exec header. */ if ((nr = read(fd, &hdr, sizeof(hdr))) != sizeof(hdr)) { (void)printf("read header: %s\n", strerror(errno)); goto err; } if (!(hdr.e_ident[0] == ELFMAG0 && hdr.e_ident[1] == ELFMAG1 && hdr.e_ident[2] == ELFMAG2 && hdr.e_ident[3] == ELFMAG3)) { (void)printf("%s: unknown executable format\n", filename); goto err; } /* * Ok, we think this is for us. */ mp = mod_allocmodule(); mp->m_name = strdup(filename); /* XXX should we prune the name? */ mp->m_type = strdup("elf kernel"); /* XXX only if that's what we really are */ dest = (vm_offset_t) hdr.e_entry; mp->m_addr = dest; if (mod_findmodule(NULL, NULL) != NULL) { printf("elf_loadmodule: kernel already loaded\n"); rval = EPERM; goto err; } rval = elf_load(fd, &hdr, (vm_offset_t) dest); /* save ELF header as metadata */ mod_addmetadata(mp, MODINFOMD_ELFHDR, sizeof(Elf_Ehdr), &hdr); *result = (struct loaded_module *)mp; err: if (fd >= 0) (void)close(fd); return (rval); } static int elf_load(int fd, Elf_Ehdr *elf, vm_offset_t dest) { Elf_Shdr *shp; Elf_Off off; int i; int first = 1; int havesyms; for (i = 0; i < elf->e_phnum; i++) { Elf_Phdr phdr; if (lseek(fd, elf->e_phoff + sizeof(phdr) * i, SEEK_SET) == -1) { (void)printf("lseek phdr: %s\n", strerror(errno)); return (1); } if (read(fd, (void *)&phdr, sizeof(phdr)) != sizeof(phdr)) { (void)printf("read phdr: %s\n", strerror(errno)); return (1); } if (phdr.p_type != PT_LOAD || (phdr.p_flags & (PF_W|PF_X)) == 0) continue; /* Read in segment. */ (void)printf("%s%lu", first ? "" : "+", phdr.p_filesz); if (lseek(fd, phdr.p_offset, SEEK_SET) == -1) { (void)printf("lseek text: %s\n", strerror(errno)); return (1); } if (read(fd, (void *)phdr.p_vaddr, phdr.p_filesz) != phdr.p_filesz) { (void)printf("read text: %s\n", strerror(errno)); return (1); } if (first || ffp_save < phdr.p_vaddr + phdr.p_memsz) ffp_save = phdr.p_vaddr + phdr.p_memsz; /* Zero out bss. */ if (phdr.p_filesz < phdr.p_memsz) { (void)printf("+%lu", phdr.p_memsz - phdr.p_filesz); bzero((void *)(phdr.p_vaddr + phdr.p_filesz), phdr.p_memsz - phdr.p_filesz); } first = 0; } /* * Copy the ELF and section headers. */ ffp_save = roundup(ffp_save, sizeof(long)); ssym = ffp_save; bcopy(elf, (void *)ffp_save, sizeof(Elf_Ehdr)); ffp_save += sizeof(Elf_Ehdr); if (lseek(fd, elf->e_shoff, SEEK_SET) == -1) { printf("lseek section headers: %s\n", strerror(errno)); return (1); } if (read(fd, (void *)ffp_save, elf->e_shnum * sizeof(Elf_Shdr)) != elf->e_shnum * sizeof(Elf_Shdr)) { printf("read section headers: %s\n", strerror(errno)); return (1); } shp = (Elf_Shdr *)ffp_save; ffp_save += roundup((elf->e_shnum * sizeof(Elf_Shdr)), sizeof(long)); /* * Now load the symbol sections themselves. Make sure the * sections are aligned. Don't bother with string tables if * there are no symbol sections. */ off = roundup((sizeof(Elf_Ehdr) + (elf->e_shnum * sizeof(Elf_Shdr))), sizeof(long)); for (havesyms = i = 0; i < elf->e_shnum; i++) if (shp[i].sh_type == SHT_SYMTAB) havesyms = 1; for (first = 1, i = 0; i < elf->e_shnum; i++) { if (shp[i].sh_type == SHT_SYMTAB || shp[i].sh_type == SHT_STRTAB) { printf("%s%ld", first ? " [" : "+", shp[i].sh_size); if (havesyms) { if (lseek(fd, shp[i].sh_offset, SEEK_SET) == -1) { printf("\nlseek symbols: %s\n", strerror(errno)); return (1); } if (read(fd, (void *)ffp_save, shp[i].sh_size) != shp[i].sh_size) { printf("\nread symbols: %s\n", strerror(errno)); return (1); } } ffp_save += roundup(shp[i].sh_size, sizeof(long)); shp[i].sh_offset = off; off += roundup(shp[i].sh_size, sizeof(long)); first = 0; } } esym = ffp_save; if (first == 0) printf("]"); ffp_save = ALPHA_K0SEG_TO_PHYS((ffp_save + PAGE_MASK) & ~PAGE_MASK) >> PAGE_SHIFT; ffp_save += 2; /* XXX OSF/1 does this, no idea why. */ (void)printf("\n"); /* * Frob the copied ELF header to give information relative * to ssym. */ elf = (Elf_Ehdr *)ssym; elf->e_phoff = 0; elf->e_shoff = sizeof(Elf_Ehdr); elf->e_phentsize = 0; elf->e_phnum = 0; return (0); } static int elf_exec(struct loaded_module *mp) { static struct bootinfo_v1 bootinfo_v1; struct module_metadata *md; Elf_Ehdr *hdr; if ((md = mod_findmetadata(mp, MODINFOMD_ELFHDR)) == NULL) return(EFTYPE); /* XXX actually EFUCKUP */ hdr = (Elf_Ehdr *)&(md->md_data); /* * Fill in the bootinfo for the kernel. */ bzero(&bootinfo_v1, sizeof(bootinfo_v1)); bootinfo_v1.ssym = ssym; bootinfo_v1.esym = esym; strncpy(bootinfo_v1.booted_kernel, mp->m_name, sizeof(bootinfo_v1.booted_kernel)); prom_getenv(PROM_E_BOOTED_OSFLAGS, bootinfo_v1.boot_flags, sizeof(bootinfo_v1.boot_flags)); bootinfo_v1.hwrpb = (void *)HWRPB_ADDR; bootinfo_v1.hwrpbsize = ((struct rpb *)HWRPB_ADDR)->rpb_size; bootinfo_v1.cngetc = NULL; bootinfo_v1.cnputc = NULL; bootinfo_v1.cnpollc = NULL; printf("Entering %s at 0x%lx...\n", mp->m_name, hdr->e_entry); closeall(); alpha_pal_imb(); (*(void (*)())hdr->e_entry)(ffp_save, ptbr_save, BOOTINFO_MAGIC, &bootinfo_v1, 1, 0); }