a465fdedc6
Moved from a two level 512/1024 entry setup mapping 32 (9/10/13) bits respectively to a three level 1024/1024/1024 entry setup mapping 43 (10/10/10/13) bits. In 32-bit mode we waste about 1/12 pages mapping the high 11 bits. We also only manage 43 of the possible 44 bits of virtual address space, wasting half of it. Oh well, maybe we'll do better next revision.
189 lines
6.2 KiB
C
189 lines
6.2 KiB
C
/* $NetBSD: elfXX_exec.c,v 1.3 1998/08/27 06:23:33 eeh Exp $ */
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/*
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* Copyright (c) 1997 Jason R. Thorpe. All rights reserved.
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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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* All rights reserved.
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*
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* ELF support derived from NetBSD/alpha's boot loader, written
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* by Christopher G. Demetriou.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* First try for the boot code
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*
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* Input syntax is:
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* [promdev[{:|,}partition]]/[filename] [flags]
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*/
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#define CONCAT(x,y) __CONCAT(x,y)
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#define CAT3(s,m,e) CONCAT(s,CONCAT(m,e))
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#if 0
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int CAT3(elf,ELFSIZE,_exec) __P((int, CAT3(Elf,ELFSIZE,_Ehdr) *, u_int64_t *, void **, void **));
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#endif
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int
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CAT3(elf, ELFSIZE, _exec)(fd, elf, entryp, ssymp, esymp)
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int fd;
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CAT3(Elf,ELFSIZE,_Ehdr) *elf;
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u_int64_t *entryp;
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void **ssymp;
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void **esymp;
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{
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CAT3(Elf,ELFSIZE,_Shdr) *shp;
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CAT3(Elf,ELFSIZE,_Off) off;
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void *addr;
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size_t size;
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int i, first = 1;
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int n;
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/*
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* Don't display load address for ELF; it's encoded in
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* each section.
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*/
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#ifdef DEBUG
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printf("elf%d_exec: ", ELFSIZE);
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#endif
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printf("Booting %s\n", opened_name);
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printf("reading %ld program headers\n", (long)elf->e_phnum);
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for (i = 0; i < elf->e_phnum; i++) {
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CAT3(Elf,ELFSIZE,_Phdr) phdr;
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printf("reading phdr %d at %lx\n", i, (long)(elf->e_phoff + sizeof(phdr) * i));
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size = lseek(fd, (size_t)(elf->e_phoff + sizeof(phdr) * i), SEEK_SET);
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printf("lseek sez: %lx %s\n", (long)size, (size<0)?strerror(errno):"");
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if (read(fd, (void *)&phdr, sizeof(phdr)) != sizeof(phdr)) {
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printf("read phdr: %s\n", strerror(errno));
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return (1);
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}
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printf("reading phdr worked, type %lx flags %lx\n", (long)phdr.p_type, (long)phdr.p_flags);
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if (phdr.p_type != Elf_pt_load ||
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(phdr.p_flags & (Elf_pf_w|Elf_pf_x)) == 0)
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continue;
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/* Read in segment. */
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printf("%s%lu@0x%lx", first ? "" : "+", (u_long)phdr.p_filesz,
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(u_long)phdr.p_vaddr);
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(void)lseek(fd, (size_t)phdr.p_offset, SEEK_SET);
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/* NB need to do 4MB allocs here */
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if (OF_claim((void *)(long)phdr.p_vaddr, phdr.p_memsz, phdr.p_align) ==
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(void *)-1)
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panic("cannot claim memory");
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if (read(fd, (void *)(long)phdr.p_vaddr, phdr.p_filesz) !=
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phdr.p_filesz) {
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printf("read segment: %s\n", strerror(errno));
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return (1);
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}
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syncicache((void *)(long)phdr.p_vaddr, phdr.p_filesz);
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/* Zero BSS. */
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if (phdr.p_filesz < phdr.p_memsz) {
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printf("+%lu@0x%lx", (u_long)phdr.p_memsz - phdr.p_filesz,
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(u_long)(phdr.p_vaddr + phdr.p_filesz));
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bzero((void*)(long)phdr.p_vaddr + phdr.p_filesz,
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(size_t)phdr.p_memsz - phdr.p_filesz);
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}
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first = 0;
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}
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printf(" \n");
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/*
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* Compute the size of the symbol table.
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*/
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size = sizeof(CAT3(Elf,ELFSIZE,_Ehdr)) + (elf->e_shnum * sizeof(CAT3(Elf,ELFSIZE,_Shdr)));
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shp = addr = alloc(elf->e_shnum * sizeof(CAT3(Elf,ELFSIZE,_Shdr)));
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(void)lseek(fd, (off_t)elf->e_shoff, SEEK_SET);
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if (read(fd, addr, (size_t)(elf->e_shnum * sizeof(CAT3(Elf,ELFSIZE,_Shdr)))) !=
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elf->e_shnum * sizeof(CAT3(Elf,ELFSIZE,_Shdr))) {
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printf("read section headers: %s\n", strerror(errno));
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return (1);
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}
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for (i = 0; i < elf->e_shnum; i++, shp++) {
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if (shp->sh_type == Elf_sht_null)
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continue;
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if (shp->sh_type != Elf_sht_symtab
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&& shp->sh_type != Elf_sht_strtab) {
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shp->sh_offset = 0;
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shp->sh_type = Elf_sht_nobits;
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continue;
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}
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size += shp->sh_size;
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}
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shp = addr;
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/*
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* Reserve memory for the symbols.
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*/
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if ((addr = OF_claim(0, size, NBPG)) == (void *)-1)
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panic("no space for symbol table");
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/*
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* Copy the headers.
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*/
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elf->e_phoff = 0;
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elf->e_shoff = sizeof(CAT3(Elf,ELFSIZE,_Ehdr));
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elf->e_phentsize = 0;
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elf->e_phnum = 0;
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bcopy(elf, addr, sizeof(CAT3(Elf,ELFSIZE,_Ehdr)));
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bcopy(shp, addr + sizeof(CAT3(Elf,ELFSIZE,_Ehdr)),
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elf->e_shnum * sizeof(CAT3(Elf,ELFSIZE,_Shdr)));
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free(shp, elf->e_shnum * sizeof(CAT3(Elf,ELFSIZE,_Shdr)));
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*ssymp = addr;
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/*
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* Now load the symbol sections themselves.
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*/
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shp = addr + sizeof(CAT3(Elf,ELFSIZE,_Ehdr));
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addr += sizeof(CAT3(Elf,ELFSIZE,_Ehdr)) + (elf->e_shnum * sizeof(CAT3(Elf,ELFSIZE,_Shdr)));
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off = sizeof(CAT3(Elf,ELFSIZE,_Ehdr)) + (elf->e_shnum * sizeof(CAT3(Elf,ELFSIZE,_Shdr)));
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for (first = 1, i = 0; i < elf->e_shnum; i++, shp++) {
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if (shp->sh_type == Elf_sht_symtab
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|| shp->sh_type == Elf_sht_strtab) {
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if (first)
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printf("symbols @ 0x%lx ", (u_long)addr);
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printf("%s%d", first ? "" : "+", (int)shp->sh_size);
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(void)lseek(fd, shp->sh_offset, SEEK_SET);
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if (read(fd, addr, shp->sh_size) != shp->sh_size) {
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printf("read symbols: %s\n", strerror(errno));
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return (1);
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}
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addr += (shp->sh_size+3)&(~3);
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shp->sh_offset = off;
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off += (shp->sh_size+3)&(~3);
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first = 0;
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}
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}
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*esymp = addr;
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*entryp = elf->e_entry;
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return (0);
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}
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