2005-02-14 Guillem Jover <guillem@hadrons.org>
* include/grub/dl.h (grub_dl_check_header): New prototype. (grub_arch_dl_check_header): Change return type to grub_err_t, remove size parameter and export function. Update all callers. * kern/dl.c (grub_dl_check_header): New function. (grub_dl_load_core): Use `grub_dl_check_header' instead of `grub_arch_dl_check_header'. Check ELF type. Check if sections are inside the core. * kern/i386/dl.c (grub_arch_dl_check_header): Remove arch independent ELF header checks. * kern/powerpc/dl.c (grub_arch_dl_check_header): Likewise. * loader/i386/pc/multiboot.c (grub_rescue_cmd_multiboot): Use `grub_dl_check_header' instead of explicit checks. Check for the ELF type. * loader/powerpc/ieee1275/linux.c (grub_rescue_cmd_linux): Use `grub_dl_check_header' instead of explicit checks. Remove arch specific ELF header checks.
This commit is contained in:
marco_g
parent
5eabe94bd9
commit
c642636f8a
8 changed files with 86 additions and 86 deletions
19
ChangeLog
19
ChangeLog
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@ -1,3 +1,22 @@
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2005-02-14 Guillem Jover <guillem@hadrons.org>
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* include/grub/dl.h (grub_dl_check_header): New prototype.
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(grub_arch_dl_check_header): Change return type to grub_err_t,
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remove size parameter and export function. Update all callers.
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* kern/dl.c (grub_dl_check_header): New function.
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(grub_dl_load_core): Use `grub_dl_check_header' instead of
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`grub_arch_dl_check_header'. Check ELF type. Check if sections
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are inside the core.
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* kern/i386/dl.c (grub_arch_dl_check_header): Remove arch
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independent ELF header checks.
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* kern/powerpc/dl.c (grub_arch_dl_check_header): Likewise.
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* loader/i386/pc/multiboot.c (grub_rescue_cmd_multiboot): Use
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`grub_dl_check_header' instead of explicit checks. Check for the
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ELF type.
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* loader/powerpc/ieee1275/linux.c (grub_rescue_cmd_linux): Use
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`grub_dl_check_header' instead of explicit checks. Remove arch
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specific ELF header checks.
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2005-02-13 Hollis Blanchard <hollis@penguinppc.org>
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* conf/powerpc-ieee1275.rmk (pkgdata_MODULES): Add ls.mod.
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@ -1,7 +1,7 @@
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/* dl.h - types and prototypes for loadable module support */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2002, 2004 Free Software Foundation, Inc.
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* Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
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*
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* GRUB is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -70,6 +70,7 @@ struct grub_dl
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};
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typedef struct grub_dl *grub_dl_t;
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grub_err_t EXPORT_FUNC(grub_dl_check_header) (void *ehdr, grub_size_t size);
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grub_dl_t EXPORT_FUNC(grub_dl_load_file) (const char *filename);
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grub_dl_t EXPORT_FUNC(grub_dl_load) (const char *name);
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grub_dl_t grub_dl_load_core (void *addr, grub_size_t size);
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@ -84,7 +85,7 @@ grub_err_t EXPORT_FUNC(grub_dl_register_symbol) (const char *name, void *addr,
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grub_dl_t mod);
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void *EXPORT_FUNC(grub_dl_resolve_symbol) (const char *name);
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int grub_arch_dl_check_header (void *ehdr, grub_size_t size);
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grub_err_t grub_arch_dl_check_header (void *ehdr);
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grub_err_t grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr);
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#endif /* ! GRUB_DL_H */
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41
kern/dl.c
41
kern/dl.c
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@ -1,7 +1,7 @@
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/* dl.c - loadable module support */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
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* Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
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*
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* GRUB is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -238,6 +238,29 @@ grub_dl_get_section_addr (grub_dl_t mod, unsigned n)
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return 0;
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}
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/* Check if EHDR is a valid ELF header. */
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grub_err_t
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grub_dl_check_header (void *ehdr, grub_size_t size)
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{
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Elf_Ehdr *e = ehdr;
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/* Check the header size. */
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if (size < sizeof (Elf_Ehdr))
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return grub_error (GRUB_ERR_BAD_OS, "ELF header smaller than expected");
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/* Check the magic numbers. */
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if (grub_arch_dl_check_header (ehdr)
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|| e->e_ident[EI_MAG0] != ELFMAG0
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|| e->e_ident[EI_MAG1] != ELFMAG1
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|| e->e_ident[EI_MAG2] != ELFMAG2
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|| e->e_ident[EI_MAG3] != ELFMAG3
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|| e->e_ident[EI_VERSION] != EV_CURRENT
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|| e->e_version != EV_CURRENT)
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return grub_error (GRUB_ERR_BAD_OS, "invalid arch independent ELF magic");
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return GRUB_ERR_NONE;
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}
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/* Load all segments from memory specified by E. */
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static grub_err_t
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grub_dl_load_segments (grub_dl_t mod, const Elf_Ehdr *e)
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@ -497,12 +520,22 @@ grub_dl_load_core (void *addr, grub_size_t size)
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grub_dl_t mod;
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e = addr;
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if (! grub_arch_dl_check_header (e, size))
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if (grub_dl_check_header (e, size))
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return 0;
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if (e->e_type != ET_REL)
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{
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grub_error (GRUB_ERR_BAD_MODULE, "invalid ELF header");
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grub_error (GRUB_ERR_BAD_MODULE, "invalid ELF file type");
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return 0;
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}
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/* Make sure that every section is within the core. */
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if (size < e->e_shoff + e->e_shentsize * e->e_shnum)
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{
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grub_error (GRUB_ERR_BAD_OS, "ELF sections outside core");
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return 0;
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}
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mod = (grub_dl_t) grub_malloc (sizeof (*mod));
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if (! mod)
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return 0;
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@ -1,7 +1,7 @@
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/* dl-386.c - arch-dependent part of loadable module support */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2002 Free Software Foundation, Inc.
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* Copyright (C) 2002, 2005 Free Software Foundation, Inc.
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*
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* GRUB is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -24,32 +24,18 @@
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#include <grub/err.h>
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/* Check if EHDR is a valid ELF header. */
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int
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grub_arch_dl_check_header (void *ehdr, grub_size_t size)
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grub_err_t
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grub_arch_dl_check_header (void *ehdr)
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{
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Elf32_Ehdr *e = ehdr;
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/* Check the header size. */
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if (size < sizeof (Elf32_Ehdr))
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return 0;
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/* Check the magic numbers. */
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if (e->e_ident[EI_MAG0] != ELFMAG0
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|| e->e_ident[EI_MAG1] != ELFMAG1
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|| e->e_ident[EI_MAG2] != ELFMAG2
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|| e->e_ident[EI_MAG3] != ELFMAG3
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|| e->e_version != EV_CURRENT
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|| e->e_ident[EI_CLASS] != ELFCLASS32
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if (e->e_ident[EI_CLASS] != ELFCLASS32
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|| e->e_ident[EI_DATA] != ELFDATA2LSB
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|| e->e_machine != EM_386
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|| e->e_type != ET_REL)
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return 0;
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|| e->e_machine != EM_386)
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return grub_error (GRUB_ERR_BAD_OS, "invalid arch specific ELF magic");
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/* Make sure that every section is within the core. */
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if (size < e->e_shoff + e->e_shentsize * e->e_shnum)
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return 0;
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return 1;
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return GRUB_ERR_NONE;
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}
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/* Relocate symbols. */
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@ -1,7 +1,7 @@
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/* dl.c - arch-dependent part of loadable module support */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2002, 2004 Free Software Foundation, Inc.
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* Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
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*
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* GRUB is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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#include <grub/err.h>
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/* Check if EHDR is a valid ELF header. */
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int
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grub_arch_dl_check_header (void *ehdr, grub_size_t size)
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grub_err_t
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grub_arch_dl_check_header (void *ehdr)
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{
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Elf32_Ehdr *e = ehdr;
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/* Check the header size. */
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if (size < sizeof (Elf32_Ehdr))
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return 0;
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/* Check the magic numbers. */
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if (!((e->e_ident[EI_MAG0] == ELFMAG0)
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&& (e->e_ident[EI_MAG1] == ELFMAG1)
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&& (e->e_ident[EI_MAG2] == ELFMAG2)
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&& (e->e_ident[EI_MAG3] == ELFMAG3)
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&& (e->e_ident[EI_CLASS] == ELFCLASS32)
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&& (e->e_ident[EI_DATA] == ELFDATA2MSB)
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&& (e->e_ident[EI_VERSION] == EV_CURRENT)
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&& (e->e_type == ET_REL) && (e->e_machine == EM_PPC)
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&& (e->e_version == EV_CURRENT)))
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return 0;
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/* Make sure that every section is within the core. */
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if (size < e->e_shoff + e->e_shentsize * e->e_shnum)
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return 0;
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if (e->e_ident[EI_CLASS] != ELFCLASS32
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|| e->e_ident[EI_DATA] != ELFDATA2MSB
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|| e->e_machine != EM_PPC)
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return grub_error (GRUB_ERR_BAD_OS, "invalid arch specific ELF magic");
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return 1;
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return GRUB_ERR_NONE;
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}
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@ -1,7 +1,7 @@
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/* multiboot.c - boot a multiboot OS image. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
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* Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -140,20 +140,18 @@ grub_rescue_cmd_multiboot (int argc, char *argv[])
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ehdr = (Elf32_Ehdr *) buffer;
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if (!((ehdr->e_ident[EI_MAG0] == ELFMAG0)
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&& (ehdr->e_ident[EI_MAG1] == ELFMAG1)
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&& (ehdr->e_ident[EI_MAG2] == ELFMAG2)
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&& (ehdr->e_ident[EI_MAG3] == ELFMAG3)
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&& (ehdr->e_ident[EI_CLASS] == ELFCLASS32)
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&& (ehdr->e_ident[EI_DATA] == ELFDATA2LSB)
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&& (ehdr->e_ident[EI_VERSION] == EV_CURRENT)
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&& (ehdr->e_type == ET_EXEC) && (ehdr->e_machine == EM_386)
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&& (ehdr->e_version == EV_CURRENT)))
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if (grub_dl_check_header (ehdr, sizeof(*ehdr)))
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{
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grub_error (GRUB_ERR_UNKNOWN_OS, "No valid ELF header found");
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goto fail;
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}
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if (ehdr->e_type != ET_EXEC)
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{
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grub_error (GRUB_ERR_UNKNOWN_OS, "invalid ELF file type");
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goto fail;
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}
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/* FIXME: Should we support program headers at strange locations? */
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if (ehdr->e_phoff + ehdr->e_phnum * ehdr->e_phentsize > GRUB_MB_SEARCH)
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{
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@ -1,7 +1,7 @@
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/* linux.c - boot Linux */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
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* Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -124,15 +124,7 @@ grub_rescue_cmd_linux (int argc, char *argv[])
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goto fail;
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}
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if (!((ehdr.e_ident[EI_MAG0] == ELFMAG0)
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&& (ehdr.e_ident[EI_MAG1] == ELFMAG1)
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&& (ehdr.e_ident[EI_MAG2] == ELFMAG2)
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&& (ehdr.e_ident[EI_MAG3] == ELFMAG3)
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&& (ehdr.e_ident[EI_CLASS] == ELFCLASS32)
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&& (ehdr.e_ident[EI_DATA] == ELFDATA2MSB)
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&& (ehdr.e_ident[EI_VERSION] == EV_CURRENT)
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&& (ehdr.e_type == ET_EXEC) && (ehdr.e_machine == EM_PPC)
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&& (ehdr.e_version == EV_CURRENT)))
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if (grub_dl_check_header (&ehdr, sizeof(ehdr)))
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{
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grub_error (GRUB_ERR_UNKNOWN_OS, "No valid ELF header found");
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goto fail;
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@ -145,20 +137,6 @@ grub_rescue_cmd_linux (int argc, char *argv[])
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goto fail;
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}
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if (ehdr.e_machine != EM_PPC)
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{
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grub_error (GRUB_ERR_UNKNOWN_OS,
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"This ELF file is not for the PPC32\n");
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goto fail;
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}
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if (ehdr.e_version != EV_CURRENT)
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{
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grub_error (GRUB_ERR_UNKNOWN_OS,
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"Invalid ELF version\n");
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goto fail;
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}
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/* Read the sections. */
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entry = ehdr.e_entry;
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if (entry == 0xc0000000)
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@ -51,11 +51,10 @@ grub_arch_modules_addr (void)
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return 0;
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}
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int
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grub_arch_dl_check_header (void *ehdr, grub_size_t size)
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grub_err_t
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grub_arch_dl_check_header (void *ehdr)
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{
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(void) ehdr;
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(void) size;
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return GRUB_ERR_BAD_MODULE;
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}
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