Add the ability to get the size of the loaded image without actually
loading. This is useful for dos loading and installboot.
This commit is contained in:
christos
parent
7a7391de52
commit
722d35a400
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@ -1,4 +1,4 @@
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/* $NetBSD: loadfile.c,v 1.2 1999/01/28 22:45:07 christos Exp $ */
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/* $NetBSD: loadfile.c,v 1.3 1999/01/29 18:44:09 christos Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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@ -75,7 +75,7 @@
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* @(#)boot.c 8.1 (Berkeley) 6/10/93
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*/
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#ifndef INSTALLBOOT
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#ifdef _STANDALONE
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#include <lib/libsa/stand.h>
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#include <lib/libkern/libkern.h>
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#else
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@ -108,7 +108,7 @@ static int aout_exec __P((int, struct exec *, u_long *, int));
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/*
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* Open 'filename', read in program and and return 0 if ok 1 on error.
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* Fill in entryp and endp.
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* Fill in marks
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*/
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int
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loadfile(fname, marks, flags)
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@ -181,57 +181,81 @@ coff_exec(fd, coff, marks, flags)
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u_long *marks;
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int flags;
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{
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paddr_t ffp_save = marks[MARK_START];
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paddr_t offset = marks[MARK_START];
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paddr_t minp = ~0, maxp = 0, pos;
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/* Read in text. */
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if (lseek(fd, ECOFF_TXTOFF(coff), SEEK_SET) == -1) {
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WARN(("lseek text"));
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return (1);
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return 1;
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}
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if (flags & LOAD_TEXT) {
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PROGRESS(("%lu", coff->a.tsize));
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if (READ(fd, coff->a.text_start, ffp_save, coff->a.tsize) !=
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coff->a.tsize) {
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WARN(("read text"));
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return (1);
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if (coff->a.tsize != 0) {
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if (flags & LOAD_TEXT) {
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PROGRESS(("%lu", coff->a.tsize));
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if (READ(fd, coff->a.text_start, coff->a.tsize) !=
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coff->a.tsize) {
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return 1;
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}
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}
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}
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else {
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if (lseek(fd, coff->a.tsize, SEEK_CUR) == -1) {
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WARN(("read text"));
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return (1);
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else {
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if (lseek(fd, coff->a.tsize, SEEK_CUR) == -1) {
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WARN(("read text"));
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return 1;
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}
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}
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if (flags & (COUNT_TEXT|LOAD_TEXT)) {
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pos = coff->a.text_start;
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if (minp > pos)
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minp = pos;
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pos += coff->a.tsize;
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if (maxp < pos)
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maxp = pos;
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}
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}
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/* Read in data. */
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if (coff->a.dsize != 0 && (flags & LOAD_DATA)) {
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PROGRESS(("+%lu", coff->a.dsize));
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if (READ(fd, coff->a.data_start, ffp_save, coff->a.dsize) !=
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coff->a.dsize) {
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WARN(("read data"));
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return (1);
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if (coff->a.dsize != 0) {
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if (flags & LOAD_DATA) {
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PROGRESS(("+%lu", coff->a.dsize));
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if (READ(fd, coff->a.data_start, coff->a.dsize) !=
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coff->a.dsize) {
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WARN(("read data"));
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return 1;
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}
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}
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if (flags & (COUNT_DATA|LOAD_DATA)) {
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pos = coff->a.data_start;
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if (minp > pos)
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minp = pos;
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pos += coff->a.dsize;
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if (maxp < pos)
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maxp = pos;
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}
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}
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/* Zero out bss. */
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if (coff->a.bsize != 0 && (flags & LOAD_BSS)) {
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PROGRESS(("+%lu", coff->a.bsize));
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BZERO(coff->a.bss_start, ffp_save, coff->a.bsize);
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if (coff->a.bsize != 0) {
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if (flags & LOAD_BSS) {
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PROGRESS(("+%lu", coff->a.bsize));
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BZERO(coff->a.bss_start, coff->a.bsize);
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}
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if (flags & (COUNT_BSS|LOAD_BSS)) {
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pos = coff->a.bss_start;
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if (minp > pos)
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minp = pos;
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pos = coff->a.bsize;
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if (maxp < pos)
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maxp = pos;
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}
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}
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#ifndef INSTALLBOOT
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ffp_save = coff->a.text_start + coff->a.tsize;
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if (ffp_save < coff->a.data_start + coff->a.dsize)
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ffp_save = coff->a.data_start + coff->a.dsize;
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if (ffp_save < coff->a.bss_start + coff->a.bsize)
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ffp_save = coff->a.bss_start + coff->a.bsize;
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#endif
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marks[MARK_START] = LOADADDR(coff->a.entry);
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marks[MARK_START] = LOADADDR(minp);
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marks[MARK_ENTRY] = LOADADDR(coff->a.entry);
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marks[MARK_NSYM] = 1; /* XXX: Kernel needs >= 0 */
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marks[MARK_SYM] = LOADADDR(ffp_save);
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marks[MARK_END] = LOADADDR(ffp_save);
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return (0);
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marks[MARK_SYM] = LOADADDR(maxp);
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marks[MARK_END] = LOADADDR(maxp);
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return 0;
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}
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#endif /* BOOT_ECOFF */
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@ -247,69 +271,88 @@ elf_exec(fd, elf, marks, flags)
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Elf_Off off;
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int i;
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size_t sz;
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int first = 1;
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int first;
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int havesyms;
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paddr_t ffp_save = marks[MARK_START], shp_save;
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vaddr_t elf_save;
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paddr_t minp = ~0, maxp = 0, pos;
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paddr_t offset = marks[MARK_START], shpp, elfp;
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for (i = 0; i < elf->e_phnum; i++) {
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for (first = 1, i = 0; i < elf->e_phnum; i++) {
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Elf_Phdr phdr;
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if (lseek(fd, elf->e_phoff + sizeof(phdr) * i, SEEK_SET)
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== -1) {
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WARN(("lseek phdr"));
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return (1);
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return 1;
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}
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if (read(fd, (void *)&phdr, sizeof(phdr)) != sizeof(phdr)) {
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WARN(("read phdr"));
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return (1);
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return 1;
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}
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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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PROGRESS(("%s%lu", first ? "" : "+", (u_long)phdr.p_filesz));
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if (lseek(fd, phdr.p_offset, SEEK_SET) == -1) {
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WARN(("lseek text"));
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return (1);
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}
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/* XXX: Assume text comes before data! */
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if ((first && (flags & LOAD_TEXT)) ||
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(!first && (flags & LOAD_DATA))) {
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if (READ(fd, phdr.p_vaddr, ffp_save, phdr.p_filesz) !=
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#define IS_TEXT(p) (p.p_type & Elf_pf_x)
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#define IS_DATA(p) (p.p_type & Elf_pf_w)
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#define IS_BSS(p) (p.p_filesz < p.p_memsz)
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/*
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* XXX: Assume first address is lowest
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*/
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if ((IS_TEXT(phdr) && (flags & LOAD_TEXT)) ||
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(IS_DATA(phdr) && (flags & LOAD_DATA))) {
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/* Read in segment. */
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PROGRESS(("%s%lu", first ? "" : "+",
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(u_long)phdr.p_filesz));
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if (lseek(fd, phdr.p_offset, SEEK_SET) == -1) {
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WARN(("lseek text"));
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return 1;
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}
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if (READ(fd, phdr.p_vaddr, phdr.p_filesz) !=
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phdr.p_filesz) {
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WARN(("read text"));
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return (1);
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return 1;
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}
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}
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first = 0;
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#ifndef INSTALLBOOT
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if (first || ffp_save < phdr.p_vaddr + phdr.p_memsz)
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ffp_save = phdr.p_vaddr + phdr.p_memsz;
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#endif
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}
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if ((IS_TEXT(phdr) && (flags & (LOAD_TEXT|COUNT_TEXT))) ||
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(IS_DATA(phdr) && (flags & (LOAD_DATA|COUNT_TEXT)))) {
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pos = phdr.p_vaddr;
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if (minp > pos)
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minp = pos;
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pos += phdr.p_filesz;
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if (maxp < pos)
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maxp = pos;
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}
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/* Zero out bss. */
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if (phdr.p_filesz < phdr.p_memsz && (flags & LOAD_BSS)) {
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if (IS_BSS(phdr) && (flags & LOAD_BSS)) {
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PROGRESS(("+%lu",
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(u_long)(phdr.p_memsz - phdr.p_filesz)));
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BZERO((phdr.p_vaddr + phdr.p_filesz), ffp_save,
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BZERO((phdr.p_vaddr + phdr.p_filesz),
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phdr.p_memsz - phdr.p_filesz);
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}
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first = 0;
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if (IS_BSS(phdr) && (flags & (LOAD_BSS|COUNT_BSS))) {
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pos += phdr.p_memsz - phdr.p_filesz;
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if (maxp < pos)
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maxp = pos;
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}
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}
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/*
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* Copy the ELF and section headers.
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*/
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ffp_save = roundup(ffp_save, sizeof(long));
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if (flags & LOAD_HDR) {
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elf_save = ffp_save;
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ffp_save += sizeof(Elf_Ehdr);
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maxp = roundup(maxp, sizeof(long));
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if (flags & (LOAD_HDR|COUNT_HDR)) {
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elfp = maxp;
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maxp += sizeof(Elf_Ehdr);
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}
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if (flags & LOAD_SYM) {
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if (flags & (LOAD_SYM|COUNT_SYM)) {
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if (lseek(fd, elf->e_shoff, SEEK_SET) == -1) {
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WARN(("lseek section headers"));
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return (1);
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return 1;
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}
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sz = elf->e_shnum * sizeof(Elf_Shdr);
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@ -317,11 +360,11 @@ elf_exec(fd, elf, marks, flags)
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if (read(fd, shp, sz) != sz) {
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WARN(("read section headers"));
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return (1);
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return 1;
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}
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shp_save = ffp_save;
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ffp_save += roundup(sz, sizeof(long));
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shpp = maxp;
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maxp += roundup(sz, sizeof(long));
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/*
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* Now load the symbol sections themselves. Make sure the
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@ -337,54 +380,56 @@ elf_exec(fd, elf, marks, flags)
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for (first = 1, i = 0; i < elf->e_shnum; i++) {
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if (shp[i].sh_type == Elf_sht_symtab ||
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shp[i].sh_type == Elf_sht_strtab) {
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PROGRESS(("%s%ld", first ? " [" : "+",
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(u_long)shp[i].sh_size));
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if (havesyms) {
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if (havesyms && (flags & LOAD_SYM)) {
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PROGRESS(("%s%ld", first ? " [" : "+",
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(u_long)shp[i].sh_size));
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if (lseek(fd, shp[i].sh_offset,
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SEEK_SET)
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== -1) {
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SEEK_SET) == -1) {
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WARN(("lseek symbols"));
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FREE(shp, sz);
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return (1);
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return 1;
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}
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if (READ(fd, ffp_save, ffp_save,
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shp[i].sh_size) != shp[i].sh_size) {
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if (READ(fd, maxp, shp[i].sh_size) !=
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shp[i].sh_size) {
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WARN(("read symbols"));
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FREE(shp, sz);
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return (1);
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return 1;
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}
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}
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ffp_save += roundup(shp[i].sh_size,
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maxp += roundup(shp[i].sh_size,
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sizeof(long));
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shp[i].sh_offset = off;
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off += roundup(shp[i].sh_size, sizeof(long));
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first = 0;
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}
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}
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BCOPY(shp, shp_save, shp_save, sz);
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FREE(shp, sz);
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if (flags & LOAD_SYM) {
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BCOPY(shp, shpp, sz);
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FREE(shp, sz);
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if (first == 0)
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PROGRESS(("]"));
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if (first == 0)
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PROGRESS(("]"));
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}
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}
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/*
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* Frob the copied ELF header to give information relative
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* to elf_save.
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* to elfp.
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*/
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if (flags & LOAD_HDR) {
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elf->e_phoff = 0;
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elf->e_shoff = sizeof(Elf_Ehdr);
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elf->e_phentsize = 0;
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elf->e_phnum = 0;
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BCOPY(elf, elf_save, elf_save, sizeof(*elf));
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BCOPY(elf, elfp, sizeof(*elf));
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}
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marks[MARK_START] = LOADADDR(elf->e_entry);
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marks[MARK_START] = LOADADDR(minp);
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marks[MARK_ENTRY] = LOADADDR(elf->e_entry);
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marks[MARK_NSYM] = 1; /* XXX: Kernel needs >= 0 */
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marks[MARK_SYM] = LOADADDR(elf_save);
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marks[MARK_END] = LOADADDR(ffp_save);
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return (0);
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marks[MARK_SYM] = LOADADDR(elfp);
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marks[MARK_END] = LOADADDR(maxp);
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return 0;
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}
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#endif /* BOOT_ELF */
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@ -397,13 +442,12 @@ aout_exec(fd, x, marks, flags)
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int flags;
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{
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u_long entry = x->a_entry;
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paddr_t ffp_save, aout_save = 0;
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paddr_t aoutp = 0;
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paddr_t minp, maxp;
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int cc;
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paddr_t offset = marks[MARK_START];
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if (marks[MARK_START] == 0)
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ffp_save = ALIGNENTRY(entry);
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else
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ffp_save = marks[MARK_START];
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minp = maxp = ALIGNENTRY(entry);
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if (lseek(fd, sizeof(*x), SEEK_SET) == -1) {
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WARN(("lseek text"));
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@ -415,28 +459,31 @@ aout_exec(fd, x, marks, flags)
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* The kernel may use this to verify that the
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* symbols were loaded by this boot program.
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*/
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if (flags & LOAD_HDR) {
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BCOPY(x, ffp_save, ffp_save, sizeof(*x));
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ffp_save += sizeof(*x);
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}
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if (flags & LOAD_HDR)
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BCOPY(x, maxp, sizeof(*x));
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if (flags & (LOAD_HDR|COUNT_HDR))
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maxp += sizeof(*x);
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/*
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* Read in the text segment.
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*/
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if (flags & LOAD_TEXT) {
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PROGRESS(("%ld", x->a_text));
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if (READ(fd, ffp_save, ffp_save, x->a_text - sizeof(*x)) !=
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if (READ(fd, maxp, x->a_text - sizeof(*x)) !=
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x->a_text - sizeof(*x)) {
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WARN(("read text"));
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return 1;
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}
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ffp_save += x->a_text - sizeof(*x);
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} else {
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if (lseek(fd, x->a_text - sizeof(*x), SEEK_CUR) == -1) {
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WARN(("seek text"));
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return (1);
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return 1;
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}
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}
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if (flags & (LOAD_TEXT|COUNT_TEXT))
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maxp += x->a_text - sizeof(*x);
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/*
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* Read in the data segment.
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@ -444,12 +491,19 @@ aout_exec(fd, x, marks, flags)
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if (flags & LOAD_DATA) {
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PROGRESS(("+%ld", x->a_data));
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if (READ(fd, ffp_save, ffp_save, x->a_data) != x->a_data) {
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if (READ(fd, maxp, x->a_data) != x->a_data) {
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WARN(("read data"));
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return 1;
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}
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ffp_save += x->a_data;
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}
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else {
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if (lseek(fd, x->a_data, SEEK_CUR) == -1) {
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WARN(("seek data"));
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return 1;
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}
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}
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if (flags & (LOAD_DATA|COUNT_DATA))
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maxp += x->a_data;
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/*
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* Zero out the BSS section.
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@ -458,58 +512,82 @@ aout_exec(fd, x, marks, flags)
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if (flags & LOAD_BSS) {
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PROGRESS(("+%ld", x->a_bss));
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BZERO(ffp_save, ffp_save, x->a_bss);
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ffp_save += x->a_bss;
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BZERO(maxp, x->a_bss);
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}
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if (flags & (LOAD_BSS|COUNT_BSS))
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maxp += x->a_bss;
|
||||
|
||||
/*
|
||||
* Read in the symbol table and strings.
|
||||
* (Always set the symtab size word.)
|
||||
*/
|
||||
if (flags & LOAD_SYM) {
|
||||
BCOPY(&x->a_syms, ffp_save, ffp_save, sizeof(x->a_syms));
|
||||
ffp_save += sizeof(x->a_syms);
|
||||
aout_save = ffp_save;
|
||||
if (flags & LOAD_SYM)
|
||||
BCOPY(&x->a_syms, maxp, sizeof(x->a_syms));
|
||||
|
||||
if (x->a_syms > 0) {
|
||||
/* Symbol table and string table length word. */
|
||||
if (flags & (LOAD_SYM|COUNT_SYM)) {
|
||||
maxp += sizeof(x->a_syms);
|
||||
aoutp = maxp;
|
||||
}
|
||||
|
||||
if (x->a_syms > 0) {
|
||||
/* Symbol table and string table length word. */
|
||||
|
||||
if (flags & LOAD_SYM) {
|
||||
PROGRESS(("+[%ld", x->a_syms));
|
||||
|
||||
if (READ(fd, ffp_save, ffp_save, x->a_syms) !=
|
||||
if (READ(fd, maxp, x->a_syms) !=
|
||||
x->a_syms) {
|
||||
WARN(("read symbols"));
|
||||
return 1;
|
||||
}
|
||||
ffp_save += x->a_syms;
|
||||
|
||||
read(fd, &cc, sizeof(cc));
|
||||
|
||||
BCOPY(&cc, ffp_save, ffp_save, sizeof(cc));
|
||||
ffp_save += sizeof(cc);
|
||||
|
||||
/* String table. Length word includes itself. */
|
||||
|
||||
PROGRESS(("+%d]", cc));
|
||||
|
||||
cc -= sizeof(int);
|
||||
if (cc <= 0) {
|
||||
WARN(("symbol table too short"));
|
||||
} else {
|
||||
if (lseek(fd, x->a_syms, SEEK_CUR) == -1) {
|
||||
WARN(("seek symbols"));
|
||||
return 1;
|
||||
}
|
||||
if (READ(fd, ffp_save, ffp_save, cc) != cc) {
|
||||
}
|
||||
if (flags & (LOAD_SYM|COUNT_SYM))
|
||||
maxp += x->a_syms;
|
||||
|
||||
read(fd, &cc, sizeof(cc));
|
||||
|
||||
if (flags & LOAD_SYM) {
|
||||
BCOPY(&cc, maxp, sizeof(cc));
|
||||
|
||||
/* String table. Length word includes itself. */
|
||||
|
||||
PROGRESS(("+%d]", cc));
|
||||
}
|
||||
if (flags & (LOAD_SYM|COUNT_SYM))
|
||||
maxp += sizeof(cc);
|
||||
|
||||
cc -= sizeof(int);
|
||||
if (cc <= 0) {
|
||||
WARN(("symbol table too short"));
|
||||
return 1;
|
||||
}
|
||||
|
||||
if (flags & LOAD_SYM) {
|
||||
if (READ(fd, maxp, cc) != cc) {
|
||||
WARN(("read strings"));
|
||||
return 1;
|
||||
}
|
||||
ffp_save += cc;
|
||||
} else {
|
||||
if (lseek(fd, cc, SEEK_CUR) == -1) {
|
||||
WARN(("seek strings"));
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
if (flags & (LOAD_SYM|COUNT_SYM))
|
||||
maxp += cc;
|
||||
}
|
||||
|
||||
marks[MARK_START] = LOADADDR(entry);
|
||||
marks[MARK_START] = LOADADDR(minp);
|
||||
marks[MARK_ENTRY] = LOADADDR(entry);
|
||||
marks[MARK_NSYM] = x->a_syms;
|
||||
marks[MARK_SYM] = LOADADDR(aout_save);
|
||||
marks[MARK_END] = LOADADDR(ffp_save);
|
||||
|
||||
marks[MARK_SYM] = LOADADDR(aoutp);
|
||||
marks[MARK_END] = LOADADDR(maxp);
|
||||
return 0;
|
||||
}
|
||||
#endif /* BOOT_AOUT */
|
||||
|
|
|
|||
|
|
@ -1,4 +1,4 @@
|
|||
/* $NetBSD: loadfile.h,v 1.2 1999/01/28 22:45:07 christos Exp $ */
|
||||
/* $NetBSD: loadfile.h,v 1.3 1999/01/29 18:44:09 christos Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 1998 The NetBSD Foundation, Inc.
|
||||
|
|
@ -44,37 +44,45 @@
|
|||
* Array indices in the u_long position array
|
||||
*/
|
||||
#define MARK_START 0
|
||||
#define MARK_NSYM 1
|
||||
#define MARK_SYM 2
|
||||
#define MARK_END 3
|
||||
#define MARK_MAX 4
|
||||
#define MARK_ENTRY 1
|
||||
#define MARK_NSYM 2
|
||||
#define MARK_SYM 3
|
||||
#define MARK_END 4
|
||||
#define MARK_MAX 5
|
||||
|
||||
/*
|
||||
* Bit flags for sections to load
|
||||
*/
|
||||
#define LOAD_TEXT 0x01
|
||||
#define LOAD_DATA 0x02
|
||||
#define LOAD_BSS 0x04
|
||||
#define LOAD_SYM 0x08
|
||||
#define LOAD_HDR 0x10
|
||||
#define LOAD_ALL 0x1f
|
||||
#define LOAD_TEXT 0x0001
|
||||
#define LOAD_DATA 0x0002
|
||||
#define LOAD_BSS 0x0004
|
||||
#define LOAD_SYM 0x0008
|
||||
#define LOAD_HDR 0x0010
|
||||
#define LOAD_ALL 0x001f
|
||||
|
||||
#define COUNT_TEXT 0x0100
|
||||
#define COUNT_DATA 0x0200
|
||||
#define COUNT_BSS 0x0400
|
||||
#define COUNT_SYM 0x0800
|
||||
#define COUNT_HDR 0x1000
|
||||
#define COUNT_ALL 0x1f00
|
||||
|
||||
int loadfile __P((const char *, u_long *, int));
|
||||
|
||||
#ifndef INSTALLBOOT
|
||||
#ifdef _STANDALONE
|
||||
|
||||
#define LOADADDR(a) ((u_long)(a) & 0x00ffffff)
|
||||
#define LOADADDR(a) ((((u_long)(a)) & 0x00ffffff) + offset)
|
||||
#define ALIGNENTRY(a) ((u_long)(a) & 0x00100000)
|
||||
#define READ(f, b, v, c) pread((f), (void *)LOADADDR(b), (c))
|
||||
#define BCOPY(s, d, v, c) vpbcopy((s), (void *)LOADADDR(d), (c))
|
||||
#define BZERO(d, v, c) pbzero((void *)LOADADDR(d), (c))
|
||||
#define READ(f, b, c) pread((f), (void *)LOADADDR(b), (c))
|
||||
#define BCOPY(s, d, c) vpbcopy((s), (void *)LOADADDR(d), (c))
|
||||
#define BZERO(d, c) pbzero((void *)LOADADDR(d), (c))
|
||||
#define WARN(a) (void)(printf a, \
|
||||
printf((errno ? ": %s\n" : "\n"), \
|
||||
strerror(errno)))
|
||||
#define PROGRESS(a) (void) printf a
|
||||
#define ALLOC(a) alloc(a)
|
||||
#define FREE(a, b) free(a, b)
|
||||
#define OKMAGIC(a) ((a) == NMAGIC)
|
||||
#define OKMAGIC(a) ((a) == ZMAGIC)
|
||||
|
||||
void vpbcopy __P((const void *, void *, size_t));
|
||||
void pbzero __P((void *, size_t));
|
||||
|
|
@ -82,11 +90,11 @@ ssize_t pread __P((int, void *, size_t));
|
|||
|
||||
#else
|
||||
|
||||
#define LOADADDR(a) ((u_long)(a))
|
||||
#define LOADADDR(a) (((u_long)(a)) + offset)
|
||||
#define ALIGNENTRY(a) ((u_long)(a))
|
||||
#define READ(f, b, v, c) vread((u_long)(f), (b), &(v), (c))
|
||||
#define BCOPY(s, d, v, c) vcopy((u_long)(s), (d), &(v), (c))
|
||||
#define BZERO(d, v, c) vzero((u_long)(d), &(v), (c))
|
||||
#define READ(f, b, c) read((f), (void *)LOADADDR(b), (c))
|
||||
#define BCOPY(s, d, c) memcpy((void *)LOADADDR(d), (void *)(s), (c))
|
||||
#define BZERO(d, c) memset((void *)LOADADDR(d), 0, (c))
|
||||
#define WARN(a) warn a
|
||||
#define PROGRESS(a) /* nothing */
|
||||
#define ALLOC(a) malloc(a)
|
||||
|
|
|
|||
Loading…
Reference in New Issue