/* $NetBSD: bootxx.c,v 1.5.70.1 2020/06/20 13:49:32 martin Exp $ */ /*- * Copyright (c) 2004, 2005 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by UCHIYAMA Yasushi. * * 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. * * 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. */ #ifdef _STANDALONE #include #include #endif #include #include #include "bootxx.h" #include #include #include #include #include "common.h" #define IS_TEXT(p) (p.p_flags & PF_X) #define IS_DATA(p) ((p.p_flags & PF_X) == 0) #define IS_BSS(p) (p.p_filesz < p.p_memsz) #define FILHSZ (sizeof(struct ecoff_filehdr)) #define SCNHSZ (sizeof(struct ecoff_scnhdr)) #define N_TXTOFF(f, a) \ ((a)->vstamp < 23 ? \ ((FILHSZ +(f)->f_opthdr +(f)->f_nscns * SCNHSZ + 7) & ~7) : \ ((FILHSZ +(f)->f_opthdr +(f)->f_nscns * SCNHSZ + 15) & ~15)) int main(void); int loader(const char *, uint32_t *); int load_elf(uint8_t *, uint32_t *); int load_coff(uint8_t *, uint32_t *); int dk_read(int, int, void *); const char *errmsg[] = { [BERR_PDINFO] = "No PDINFO", [BERR_RDVTOC] = "VTOC read error", [BERR_VTOC] = "VTOC bad magic", [BERR_NOBFS] = "No BFS partition", [BERR_RDINODE] = "I-node read error", [BERR_NOROOT] = "No root", [BERR_RDDIRENT] = "Dirent read error", [BERR_NOFILE] = "No such a file", [BERR_RDFILE] = "File read error", [BERR_FILEMAGIC] = "Bad file magic", [BERR_AOUTHDR] = "Not a OMAGIC", [BERR_ELFHDR] = "Not a ELF", [BERR_TARHDR] = "Read tar file", [BERR_TARMAGIC] = "Bad tar magic", }; const char *boottab[] = { "boot", /* NetBSD (bfs,ustarfs) */ "iopboot", /* EWS-UX (bfs) */ 0 /* terminate */ }; int __dk_unit, __dk_type, __spb; bool (*fd_position)(uint32_t, uint32_t *, int *); int main(void) { char msg[] = "[+++] NetBSD/ews4800mips >> "; const char *p; const char **boot; uint32_t entry; int err; #ifdef _STANDALONE int i, fd_format; boot_device(&__dk_type, &__dk_unit, &fd_format); msg[1] = __dk_type + '0'; msg[2] = __dk_unit + '0'; msg[3] = FS_SIGNATURE; for (i = 0; msg[i] != 0; i++) ROM_PUTC(32 + i * 12, 536, msg[i]); if (__dk_type == NVSRAM_BOOTDEV_FLOPPYDISK) { fd_position = blk_to_2d_position; if (fd_format == FD_FORMAT_2D) { fd_position = blk_to_2d_position; __spb = 2; /* 256bytes/sector */ } else { fd_position = blk_to_2hd_position; __dk_unit |= 0x1000000; /* | 2HD flag */ __spb = 1; } } #else printf("%s\n", msg); sector_init("/dev/rsd1p", DEV_BSIZE); sector_read(SDBOOT_PDINFOADDR, PDINFO_SECTOR); #endif for (boot = boottab; *boot; boot++) { if ((err = loader(*boot, &entry)) == 0) { #ifdef _STANDALONE ROM_PUTC(0, 0, '\n'); ROM_PUTC(0, 0, '\r'); return entry; #else printf("entry=%p\n", (void *)entry); sector_fini(); return 0; #endif } p = errmsg[err]; #ifdef _STANDALONE for (i = 0; p[i] != 0; i++) ROM_PUTC(600 + i * 12, 536, p[i]); #else DPRINTF("***ERROR *** %s\n", p); #endif } #ifdef _STANDALONE while (/*CONSTCOND*/1) ; /* NOTREACHED */ #else sector_fini(); #endif return 0; } int loader(const char *fname, uint32_t *entry) { int err; uint16_t mag; size_t sz; #ifdef _STANDALONE int i; for (i = 0; fname[i] != 0; i++) ROM_PUTC(380 + i * 12, 536, fname[i]); #else printf("%s\n", fname); #endif if ((err = fileread(fname, &sz)) != 0) return err; DPRINTF("%s found. %d bytes.\n", fname, sz); mag = *(uint16_t *)SDBOOT_SCRATCHADDR; if (mag == 0x7f45) return load_elf((uint8_t *)SDBOOT_SCRATCHADDR, entry); else if (mag == ECOFF_MAGIC_MIPSEB) return load_coff((uint8_t *)SDBOOT_SCRATCHADDR, entry); return BERR_FILEMAGIC; } int load_elf(uint8_t *buf, uint32_t *entry) { Elf32_Ehdr *e = (void *)buf; Elf32_Phdr *p; int i; if (e->e_ident[EI_MAG2] != 'L' || e->e_ident[EI_MAG3] != 'F' || e->e_ident[EI_CLASS] != ELFCLASS32 || e->e_ident[EI_DATA] != ELFDATA2MSB || e->e_type != ET_EXEC || e->e_machine != EM_MIPS) return BERR_ELFHDR; BASSERT(e->e_phentsize == sizeof(Elf32_Phdr)); p = (void *)(buf + e->e_phoff); #ifdef _STANDALONE for (i = 0; i < e->e_phnum; i++) { if (p[i].p_type != PT_LOAD || (p[i].p_flags & (PF_W|PF_R|PF_X)) == 0) continue; if (IS_TEXT(p[i]) || IS_DATA(p[i])) { memcpy((void *)p[i].p_vaddr, buf + p[i].p_offset, p[i].p_filesz); } if (IS_BSS(p[i])) { memset((void *)(p[i].p_vaddr + p[i].p_filesz), 0, p[i].p_memsz - p[i].p_filesz); } } #else DPRINTF("ELF entry point 0x%08x\n", e->e_entry); for (i = 0; i < e->e_phnum; i++) { if (p[i].p_type != PT_LOAD || (p[i].p_flags & (PF_W|PF_R|PF_X)) == 0) continue; if (IS_TEXT(p[i]) || IS_DATA(p[i])) { DPRINTF("[text/data] 0x%08x 0x%x %dbyte.\n", p[i].p_vaddr, p[i].p_offset, p[i].p_filesz); } if (IS_BSS(p[i])) { DPRINTF("[bss] 0x%08x %dbyte.\n", p[i].p_vaddr + p[i].p_filesz, p[i].p_memsz - p[i].p_filesz); } } #endif *entry = e->e_entry; return 0; } int load_coff(uint8_t *p, uint32_t *entry) { struct ecoff_exechdr *eh = (void *)p; struct ecoff_aouthdr *a = &eh->a; struct ecoff_filehdr *f = &eh->f; if (a->magic != ECOFF_OMAGIC) return BERR_AOUTHDR; p += N_TXTOFF(f, a); DPRINTF("file offset = 0x%x\n", N_TXTOFF(f, a)); #ifdef _STANDALONE memcpy((void *)a->text_start, p, a->tsize); memcpy((void *)a->data_start, p + a->tsize, a->dsize); #else DPRINTF("COFF entry point 0x%08lx\n", a->entry); DPRINTF("[text] 0x%08lx %ld byte.\n", a->text_start, a->tsize); DPRINTF("[data] 0x%08lx %ld byte.\n", a->data_start, a->dsize); #endif *entry = a->entry; return 0; } int dk_read(int sector, int count, void *buf) { #ifdef _STANDALONE int cnt; uint32_t pos; uint8_t *p = buf; if (__dk_type == NVSRAM_BOOTDEV_HARDDISK) { /* DISK */ if ((ROM_DK_READ(__dk_unit, sector, count, p) & 0x7f) != 0) return 1; } else { /* FD */ while (count > 0) { fd_position(sector, &pos, &cnt); if (cnt > count) cnt = count; if ((ROM_FD_READ(__dk_unit, pos, cnt * __spb, p) & 0x7f) != 0) return 1; count -= cnt; sector += cnt; p += 512 * cnt; } } #else sector_read_n(buf, sector, count); #endif return 0; }