mirror of
https://github.com/sheumann/hush.git
synced 2024-11-16 18:12:41 +00:00
f2ccefb946
This commit adds support for the -R flag of setarch, which disables randomization of the virtual address space. function old new delta setarch_main 115 150 +35 packed_usage 30664 30651 -13 Signed-off-by: Jan Heylen <heyleke@gmail.com> Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* linux32/linux64 allows for changing uname emulation.
|
|
*
|
|
* Copyright 2002 Andi Kleen, SuSE Labs.
|
|
*
|
|
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
|
*/
|
|
//config:config SETARCH
|
|
//config: bool "setarch"
|
|
//config: default y
|
|
//config: select PLATFORM_LINUX
|
|
//config: help
|
|
//config: The linux32 utility is used to create a 32bit environment for the
|
|
//config: specified program (usually a shell). It only makes sense to have
|
|
//config: this util on a system that supports both 64bit and 32bit userland
|
|
//config: (like amd64/x86, ppc64/ppc, sparc64/sparc, etc...).
|
|
|
|
//applet:IF_SETARCH(APPLET(setarch, BB_DIR_BIN, BB_SUID_DROP))
|
|
//applet:IF_SETARCH(APPLET_ODDNAME(linux32, setarch, BB_DIR_BIN, BB_SUID_DROP, linux32))
|
|
//applet:IF_SETARCH(APPLET_ODDNAME(linux64, setarch, BB_DIR_BIN, BB_SUID_DROP, linux64))
|
|
|
|
//kbuild:lib-$(CONFIG_SETARCH) += setarch.o
|
|
|
|
//usage:#define setarch_trivial_usage
|
|
//usage: "PERSONALITY [-R] PROG ARGS"
|
|
//usage:#define setarch_full_usage "\n\n"
|
|
//usage: "PERSONALITY may be:"
|
|
//usage: "\n"" linux32 Set 32bit uname emulation"
|
|
//usage: "\n"" linux64 Set 64bit uname emulation"
|
|
//usage: "\n"
|
|
//usage: "\n"" -R Disable address space randomization"
|
|
//usage:
|
|
//usage:#define linux32_trivial_usage NOUSAGE_STR
|
|
//usage:#define linux32_full_usage ""
|
|
//usage:
|
|
//usage:#define linux64_trivial_usage NOUSAGE_STR
|
|
//usage:#define linux64_full_usage ""
|
|
|
|
#include "libbb.h"
|
|
#include <sys/personality.h>
|
|
|
|
#ifndef ADDR_NO_RANDOMIZE
|
|
# define ADDR_NO_RANDOMIZE 0x0040000
|
|
#endif
|
|
|
|
int setarch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int setarch_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
unsigned opts;
|
|
unsigned long pers;
|
|
|
|
/* Figure out what personality we are supposed to switch to ...
|
|
* we can be invoked as either:
|
|
* argv[0],argv[1] == "setarch","personality"
|
|
* argv[0] == "personality"
|
|
*/
|
|
if (ENABLE_SETARCH && applet_name[0] == 's'
|
|
&& argv[1] && is_prefixed_with(argv[1], "linux")
|
|
) {
|
|
applet_name = argv[1];
|
|
argv++;
|
|
}
|
|
if (applet_name[5] == '6') /* linux64 */
|
|
pers = PER_LINUX;
|
|
else if (applet_name[5] == '3') /* linux32 */
|
|
pers = PER_LINUX32;
|
|
else
|
|
bb_show_usage();
|
|
|
|
opts = getopt32(argv, "+R"); /* '+': stop at first non-option */
|
|
if (opts)
|
|
pers |= ADDR_NO_RANDOMIZE;
|
|
|
|
/* Try to set personality */
|
|
if (personality(pers) < 0)
|
|
bb_perror_msg_and_die("personality(0x%lx)", pers);
|
|
|
|
argv += optind;
|
|
if (!argv[0])
|
|
(--argv)[0] = (char*)"/bin/sh";
|
|
|
|
/* Try to execute the program */
|
|
BB_EXECVP_or_die(argv);
|
|
}
|