Annotation of sys/arch/sparc64/stand/ofwboot/elfXX_exec.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: elfXX_exec.c,v 1.6 2007/01/12 20:16:19 miod Exp $ */
! 2: /* $NetBSD: elfXX_exec.c,v 1.2 2001/08/15 20:08:15 eeh Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1998-2000 Eduardo Horvath. All rights reserved.
! 6: * Copyright (c) 1997 Jason R. Thorpe. All rights reserved.
! 7: * Copyright (C) 1995, 1996 Wolfgang Solfrank.
! 8: * Copyright (C) 1995, 1996 TooLs GmbH.
! 9: * All rights reserved.
! 10: *
! 11: * ELF support derived from NetBSD/alpha's boot loader, written
! 12: * by Christopher G. Demetriou.
! 13: *
! 14: * Redistribution and use in source and binary forms, with or without
! 15: * modification, are permitted provided that the following conditions
! 16: * are met:
! 17: * 1. Redistributions of source code must retain the above copyright
! 18: * notice, this list of conditions and the following disclaimer.
! 19: * 2. Redistributions in binary form must reproduce the above copyright
! 20: * notice, this list of conditions and the following disclaimer in the
! 21: * documentation and/or other materials provided with the distribution.
! 22: * 3. All advertising materials mentioning features or use of this software
! 23: * must display the following acknowledgement:
! 24: * This product includes software developed by TooLs GmbH.
! 25: * 4. The name of TooLs GmbH may not be used to endorse or promote products
! 26: * derived from this software without specific prior written permission.
! 27: *
! 28: * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
! 29: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 30: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 31: * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
! 32: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
! 33: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
! 34: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
! 35: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
! 36: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
! 37: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 38: */
! 39:
! 40: /*
! 41: * First try for the boot code
! 42: *
! 43: * Input syntax is:
! 44: * [promdev[{:|,}partition]]/[filename] [flags]
! 45: */
! 46:
! 47: #define CONCAT(x,y) __CONCAT(x,y)
! 48: #define CAT3(s,m,e) CONCAT(s,CONCAT(m,e))
! 49: #define MEG (1024*1024)
! 50:
! 51: #if 0
! 52: int CAT3(elf,ELFSIZE,_exec)(int, CAT3(Elf,ELFSIZE,_Ehdr) *, u_int64_t *, void **, void **);
! 53: #endif
! 54: #define ELF_ALIGN(x) (((x)+7)&(~7))
! 55:
! 56: int
! 57: CAT3(elf, ELFSIZE, _exec)(fd, elf, entryp, ssymp, esymp)
! 58: int fd;
! 59: CAT3(Elf,ELFSIZE,_Ehdr) *elf;
! 60: u_int64_t *entryp;
! 61: void **ssymp;
! 62: void **esymp;
! 63: {
! 64: CAT3(Elf,ELFSIZE,_Shdr) *shp;
! 65: CAT3(Elf,ELFSIZE,_Off) off;
! 66: void *addr;
! 67: size_t size;
! 68: u_int align;
! 69: int i, first = 1;
! 70: int n;
! 71:
! 72: /*
! 73: * Don't display load address for ELF; it's encoded in
! 74: * each section.
! 75: */
! 76: #ifdef DEBUG
! 77: printf("elf%d_exec: ", ELFSIZE);
! 78: #endif
! 79: printf("Booting %s\n", opened_name);
! 80:
! 81: for (i = 0; i < elf->e_phnum; i++) {
! 82: CAT3(Elf,ELFSIZE,_Phdr) phdr;
! 83: size = lseek(fd, (size_t)(elf->e_phoff + sizeof(phdr) * i), SEEK_SET);
! 84: if (read(fd, (void *)&phdr, sizeof(phdr)) != sizeof(phdr)) {
! 85: printf("read phdr: %s\n", strerror(errno));
! 86: return (1);
! 87: }
! 88: if (phdr.p_type != PT_LOAD ||
! 89: (phdr.p_flags & (PF_W|PF_X)) == 0)
! 90: continue;
! 91:
! 92: /* Read in segment. */
! 93: printf("%s%lu@0x%lx", first ? "" : "+", (u_long)phdr.p_filesz,
! 94: (u_long)phdr.p_vaddr);
! 95: (void)lseek(fd, (size_t)phdr.p_offset, SEEK_SET);
! 96: /*
! 97: * If the segment's VA is aligned on a 4MB boundary, align its
! 98: * request 4MB aligned physical memory. Otherwise use default
! 99: * alignment. Make sure BSS is extended to a 4MB boundary, too.
! 100: */
! 101: align = phdr.p_align;
! 102: if ((phdr.p_vaddr & (4*MEG-1)) == 0)
! 103: align = 4*MEG;
! 104: if (phdr.p_filesz < phdr.p_memsz)
! 105: phdr.p_memsz = (phdr.p_memsz + 4*MEG) & ~(4*MEG-1);
! 106: if (OF_claim((void *)(long)phdr.p_vaddr, phdr.p_memsz, align) ==
! 107: (void *)-1)
! 108: panic("cannot claim memory");
! 109: if (read(fd, (void *)(long)phdr.p_vaddr, phdr.p_filesz) !=
! 110: phdr.p_filesz) {
! 111: printf("read segment: %s\n", strerror(errno));
! 112: return (1);
! 113: }
! 114: syncicache((void *)(long)phdr.p_vaddr, phdr.p_filesz);
! 115:
! 116: /* Zero BSS. */
! 117: if (phdr.p_filesz < phdr.p_memsz) {
! 118: printf("+%lu@0x%lx", (u_long)phdr.p_memsz - phdr.p_filesz,
! 119: (u_long)(phdr.p_vaddr + phdr.p_filesz));
! 120: bzero((void *)(long)phdr.p_vaddr + phdr.p_filesz,
! 121: (size_t)phdr.p_memsz - phdr.p_filesz);
! 122: }
! 123: first = 0;
! 124: }
! 125:
! 126: printf(" \n");
! 127:
! 128: /*
! 129: * Compute the size of the symbol table.
! 130: */
! 131: size = sizeof(CAT3(Elf,ELFSIZE,_Ehdr)) + (elf->e_shnum * sizeof(CAT3(Elf,ELFSIZE,_Shdr)));
! 132: shp = addr = alloc(elf->e_shnum * sizeof(CAT3(Elf,ELFSIZE,_Shdr)));
! 133: (void)lseek(fd, (off_t)elf->e_shoff, SEEK_SET);
! 134: if (read(fd, addr, (size_t)(elf->e_shnum * sizeof(CAT3(Elf,ELFSIZE,_Shdr)))) !=
! 135: elf->e_shnum * sizeof(CAT3(Elf,ELFSIZE,_Shdr))) {
! 136: printf("read section headers: %s\n", strerror(errno));
! 137: return (1);
! 138: }
! 139: for (i = 0; i < elf->e_shnum; i++, shp++) {
! 140: if (shp->sh_type == SHT_NULL)
! 141: continue;
! 142: if (shp->sh_type != SHT_SYMTAB
! 143: && shp->sh_type != SHT_STRTAB) {
! 144: shp->sh_offset = 0;
! 145: continue;
! 146: }
! 147: size += shp->sh_size;
! 148: }
! 149: shp = addr;
! 150:
! 151: /*
! 152: * Reserve memory for the symbols.
! 153: */
! 154: if ((addr = OF_claim(0, size, NBPG)) == (void *)-1)
! 155: panic("no space for symbol table");
! 156:
! 157: /*
! 158: * Copy the headers.
! 159: */
! 160: elf->e_phoff = 0;
! 161: elf->e_shoff = sizeof(CAT3(Elf,ELFSIZE,_Ehdr));
! 162: elf->e_phentsize = 0;
! 163: elf->e_phnum = 0;
! 164: bcopy(elf, addr, sizeof(CAT3(Elf,ELFSIZE,_Ehdr)));
! 165: bcopy(shp, addr + sizeof(CAT3(Elf,ELFSIZE,_Ehdr)),
! 166: elf->e_shnum * sizeof(CAT3(Elf,ELFSIZE,_Shdr)));
! 167: free(shp, elf->e_shnum * sizeof(CAT3(Elf,ELFSIZE,_Shdr)));
! 168: *ssymp = addr;
! 169:
! 170: /*
! 171: * Now load the symbol sections themselves.
! 172: */
! 173: shp = addr + sizeof(CAT3(Elf,ELFSIZE,_Ehdr));
! 174: size = sizeof(CAT3(Elf,ELFSIZE,_Ehdr)) +
! 175: (elf->e_shnum * sizeof(CAT3(Elf,ELFSIZE,_Shdr)));
! 176: size = ELF_ALIGN(size);
! 177: addr += size;
! 178: off = size;
! 179: for (first = 1, i = 0; i < elf->e_shnum; i++, shp++) {
! 180: if (shp->sh_type == SHT_SYMTAB
! 181: || shp->sh_type == SHT_STRTAB) {
! 182: if (first)
! 183: printf("symbols @ 0x%lx ", (u_long)addr);
! 184: printf("%s%d", first ? "" : "+", (int)shp->sh_size);
! 185: (void)lseek(fd, shp->sh_offset, SEEK_SET);
! 186: if (read(fd, addr, shp->sh_size) != shp->sh_size) {
! 187: printf("read symbols: %s\n", strerror(errno));
! 188: return (1);
! 189: }
! 190: addr += ELF_ALIGN(shp->sh_size);
! 191: shp->sh_offset = off;
! 192: off += ELF_ALIGN(shp->sh_size);
! 193: first = 0;
! 194: }
! 195: }
! 196: *esymp = addr;
! 197:
! 198: *entryp = elf->e_entry;
! 199: return (0);
! 200: }
! 201:
! 202: #undef ELF_ALIGN
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