Adding upstream version 2.38.1.upstream/2.38.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 479 insertions, 0 deletions

diff --git a/sys-utils/setarch.c b/sys-utils/setarch.c
new file mode 100644
index 0000000..b86be1e
--- /dev/null
+++ b/sys-utils/setarch.c
@@ -0,0 +1,479 @@
+/*
+ * Copyright (C) 2003-2007 Red Hat, Inc.
+ *
+ * This file is part of util-linux.
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This file is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ *
+ * Written by Elliot Lee <sopwith@redhat.com>
+ * New personality options & code added by Jindrich Novy <jnovy@redhat.com>
+ * ADD_NO_RANDOMIZE flag added by Arjan van de Ven <arjanv@redhat.com>
+ * Help and MIPS support from Mike Frysinger (vapier@gentoo.org)
+ * Better error handling from Dmitry V. Levin (ldv@altlinux.org)
+ *
+ * based on ideas from the ppc32 util by Guy Streeter (2002-01), based on the
+ * sparc32 util by Jakub Jelinek (1998, 1999)
+ */
+
+#include <sys/personality.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <limits.h>
+#include <sys/utsname.h>
+#include "nls.h"
+#include "c.h"
+#include "closestream.h"
+
+#ifndef HAVE_PERSONALITY
+# include <syscall.h>
+# define personality(pers) ((long)syscall(SYS_personality, pers))
+#endif
+
+#define turn_on(_flag, _opts) \
+	do { \
+		(_opts) |= _flag; \
+		if (verbose) \
+			printf(_("Switching on %s.\n"), #_flag); \
+	} while(0)
+
+#ifndef UNAME26
+# define UNAME26                 0x0020000
+#endif
+#ifndef ADDR_NO_RANDOMIZE
+# define ADDR_NO_RANDOMIZE       0x0040000
+#endif
+#ifndef FDPIC_FUNCPTRS
+# define FDPIC_FUNCPTRS          0x0080000
+#endif
+#ifndef MMAP_PAGE_ZERO
+# define MMAP_PAGE_ZERO          0x0100000
+#endif
+#ifndef ADDR_COMPAT_LAYOUT
+# define ADDR_COMPAT_LAYOUT      0x0200000
+#endif
+#ifndef READ_IMPLIES_EXEC
+# define READ_IMPLIES_EXEC       0x0400000
+#endif
+#ifndef ADDR_LIMIT_32BIT
+# define ADDR_LIMIT_32BIT        0x0800000
+#endif
+#ifndef SHORT_INODE
+# define SHORT_INODE             0x1000000
+#endif
+#ifndef WHOLE_SECONDS
+# define WHOLE_SECONDS           0x2000000
+#endif
+#ifndef STICKY_TIMEOUTS
+# define STICKY_TIMEOUTS         0x4000000
+#endif
+#ifndef ADDR_LIMIT_3GB
+# define ADDR_LIMIT_3GB          0x8000000
+#endif
+
+
+struct arch_domain {
+	int		perval;		/* PER_* */
+	const char	*target_arch;
+	const char	*result_arch;
+};
+
+
+static void __attribute__((__noreturn__)) usage(int archwrapper)
+{
+	fputs(USAGE_HEADER, stdout);
+	if (!archwrapper)
+		printf(_(" %s [<arch>] [options] [<program> [<argument>...]]\n"), program_invocation_short_name);
+	else
+		printf(_(" %s [options] [<program> [<argument>...]]\n"), program_invocation_short_name);
+
+	fputs(USAGE_SEPARATOR, stdout);
+	fputs(_("Change the reported architecture and set personality flags.\n"), stdout);
+
+	fputs(USAGE_OPTIONS, stdout);
+	fputs(_(" -B, --32bit              turns on ADDR_LIMIT_32BIT\n"), stdout);
+	fputs(_(" -F, --fdpic-funcptrs     makes function pointers point to descriptors\n"), stdout);
+	fputs(_(" -I, --short-inode        turns on SHORT_INODE\n"), stdout);
+	fputs(_(" -L, --addr-compat-layout changes the way virtual memory is allocated\n"), stdout);
+	fputs(_(" -R, --addr-no-randomize  disables randomization of the virtual address space\n"), stdout);
+	fputs(_(" -S, --whole-seconds      turns on WHOLE_SECONDS\n"), stdout);
+	fputs(_(" -T, --sticky-timeouts    turns on STICKY_TIMEOUTS\n"), stdout);
+	fputs(_(" -X, --read-implies-exec  turns on READ_IMPLIES_EXEC\n"), stdout);
+	fputs(_(" -Z, --mmap-page-zero     turns on MMAP_PAGE_ZERO\n"), stdout);
+	fputs(_(" -3, --3gb                limits the used address space to a maximum of 3 GB\n"), stdout);
+	fputs(_("     --4gb                ignored (for backward compatibility only)\n"), stdout);
+	fputs(_("     --uname-2.6          turns on UNAME26\n"), stdout);
+	fputs(_(" -v, --verbose            say what options are being switched on\n"), stdout);
+
+	if (!archwrapper)
+		fputs(_("     --list               list settable architectures, and exit\n"), stdout);
+
+	fputs(USAGE_SEPARATOR, stdout);
+	printf(USAGE_HELP_OPTIONS(26));
+	printf(USAGE_MAN_TAIL("setarch(8)"));
+
+	exit(EXIT_SUCCESS);
+}
+
+/*
+ * Returns inilialized list of all available execution domains.
+ */
+static struct arch_domain *init_arch_domains(void)
+{
+	static struct utsname un;
+	size_t i;
+
+	static struct arch_domain transitions[] =
+	{
+		{UNAME26,	"uname26",	NULL},
+		{PER_LINUX32,	"linux32",	NULL},
+		{PER_LINUX,	"linux64",	NULL},
+#if defined(__powerpc__) || defined(__powerpc64__)
+# ifdef __BIG_ENDIAN__
+		{PER_LINUX32,	"ppc32",	"ppc"},
+		{PER_LINUX32,	"ppc",		"ppc"},
+		{PER_LINUX,	"ppc64",	"ppc64"},
+		{PER_LINUX,	"ppc64pseries",	"ppc64"},
+		{PER_LINUX,	"ppc64iseries",	"ppc64"},
+# else
+		{PER_LINUX32,	"ppc32",	"ppcle"},
+		{PER_LINUX32,	"ppc",		"ppcle"},
+		{PER_LINUX32,	"ppc32le",	"ppcle"},
+		{PER_LINUX32,	"ppcle",	"ppcle"},
+		{PER_LINUX,	"ppc64le",	"ppc64le"},
+# endif
+#endif
+#if defined(__x86_64__) || defined(__i386__) || defined(__ia64__)
+		{PER_LINUX32,	"i386",		"i386"},
+		{PER_LINUX32,	"i486",		"i386"},
+		{PER_LINUX32,	"i586",		"i386"},
+		{PER_LINUX32,	"i686",		"i386"},
+		{PER_LINUX32,	"athlon",	"i386"},
+#endif
+#if defined(__x86_64__) || defined(__i386__)
+		{PER_LINUX,	"x86_64",	"x86_64"},
+#endif
+#if defined(__ia64__) || defined(__i386__)
+		{PER_LINUX,	"ia64",		"ia64"},
+#endif
+#if defined(__hppa__)
+		{PER_LINUX32,	"parisc32",	"parisc"},
+		{PER_LINUX32,	"parisc",	"parisc"},
+		{PER_LINUX,	"parisc64",	"parisc64"},
+#endif
+#if defined(__s390x__) || defined(__s390__)
+		{PER_LINUX32,	"s390",		"s390"},
+		{PER_LINUX,	"s390x",	"s390x"},
+#endif
+#if defined(__sparc64__) || defined(__sparc__)
+		{PER_LINUX32,	"sparc",	"sparc"},
+		{PER_LINUX32,	"sparc32bash",	"sparc"},
+		{PER_LINUX32,	"sparc32",	"sparc"},
+		{PER_LINUX,	"sparc64",	"sparc64"},
+#endif
+#if defined(__mips64__) || defined(__mips__)
+		{PER_LINUX32,	"mips32",	"mips"},
+		{PER_LINUX32,	"mips",		"mips"},
+		{PER_LINUX,	"mips64",	"mips64"},
+#endif
+#if defined(__alpha__)
+		{PER_LINUX,	"alpha",	"alpha"},
+		{PER_LINUX,	"alphaev5",	"alpha"},
+		{PER_LINUX,	"alphaev56",	"alpha"},
+		{PER_LINUX,	"alphaev6",	"alpha"},
+		{PER_LINUX,	"alphaev67",	"alpha"},
+#endif
+#if defined(__e2k__)
+		{PER_LINUX,	"e2k",      "e2k"},
+		{PER_LINUX,	"e2kv4",	"e2k"},
+		{PER_LINUX,	"e2kv5",	"e2k"},
+		{PER_LINUX,	"e2kv6",	"e2k"},
+		{PER_LINUX,	"e2k4c",	"e2k"},
+		{PER_LINUX,	"e2k8c",	"e2k"},
+		{PER_LINUX,	"e2k1cp",	"e2k"},
+		{PER_LINUX,	"e2k8c2",	"e2k"},
+		{PER_LINUX,	"e2k12c",	"e2k"},
+		{PER_LINUX,	"e2k16c",	"e2k"},
+		{PER_LINUX,	"e2k2c3",	"e2k"},
+#endif
+#if defined(__arm__) || defined(__aarch64__)
+# ifdef __BIG_ENDIAN__
+		{PER_LINUX32,	"armv7b",	"arm"},
+		{PER_LINUX32,	"armv8b",	"arm"},
+# else
+		{PER_LINUX32,	"armv7l",	"arm"},
+		{PER_LINUX32,	"armv8l",	"arm"},
+# endif
+		{PER_LINUX32,	"armh",		"arm"},
+		{PER_LINUX32,	"arm",		"arm"},
+		{PER_LINUX,	"arm64",	"aarch64"},
+		{PER_LINUX,	"aarch64",	"aarch64"},
+#endif
+		/* place holder, will be filled up at runtime */
+		{-1,		NULL,		NULL},
+		{-1,		NULL,		NULL}
+	};
+
+	/* Add the trivial transition {PER_LINUX, machine, machine} if no
+	 * such target_arch is hardcoded yet.  */
+	uname(&un);
+	for (i = 0; transitions[i].perval >= 0; i++)
+		if (!strcmp(un.machine, transitions[i].target_arch))
+			break;
+	if (transitions[i].perval < 0) {
+		unsigned long wrdsz = CHAR_BIT * sizeof(void *);
+		if (wrdsz == 32 || wrdsz == 64) {
+			/* fill up the place holder */
+			transitions[i].perval = wrdsz == 32 ? PER_LINUX32 : PER_LINUX;
+			transitions[i].target_arch = un.machine;
+			transitions[i].result_arch = un.machine;
+		}
+	}
+
+	return transitions;
+}
+
+/*
+ * List all execution domains from transitions
+ */
+static void list_arch_domains(struct arch_domain *doms)
+{
+	struct arch_domain *d;
+
+	for (d = doms; d->target_arch != NULL; d++)
+		printf("%s\n", d->target_arch);
+}
+
+static struct arch_domain *get_arch_domain(struct arch_domain *doms, const char *pers)
+{
+	struct arch_domain *d;
+
+	for (d = doms; d && d->perval >= 0; d++) {
+		if (!strcmp(pers, d->target_arch))
+			break;
+	}
+
+	return !d || d->perval < 0 ? NULL : d;
+}
+
+static void verify_arch_domain(struct arch_domain *doms, struct arch_domain *target, const char *wanted)
+{
+	struct utsname un;
+
+	if (!doms || !target || !target->result_arch)
+		return;
+
+	uname(&un);
+
+	if (!strcmp(un.machine, target->result_arch))
+		return;
+
+	if (!strcmp(target->result_arch, "i386") ||
+	    !strcmp(target->result_arch, "arm")) {
+		struct arch_domain *dom;
+		for (dom = doms; dom->target_arch != NULL; dom++) {
+			if (!dom->result_arch || strcmp(dom->result_arch, target->result_arch))
+				continue;
+			if (!strcmp(dom->target_arch, un.machine))
+				return;
+		}
+	}
+
+	errx(EXIT_FAILURE, _("Kernel cannot set architecture to %s"), wanted);
+}
+
+int main(int argc, char *argv[])
+{
+	const char *arch = NULL;
+	unsigned long options = 0;
+	int verbose = 0;
+	int archwrapper;
+	int c;
+	struct arch_domain *doms = NULL, *target = NULL;
+	unsigned long pers_value = 0;
+	char *shell = NULL, *shell_arg = NULL;
+
+	/* Options without equivalent short options */
+	enum {
+		OPT_4GB = CHAR_MAX + 1,
+		OPT_UNAME26,
+		OPT_LIST
+	};
+
+	/* Options --3gb and --4gb are for compatibility with an old
+	 * Debian setarch implementation.  */
+	static const struct option longopts[] = {
+		{"help",		no_argument,	NULL,	'h'},
+		{"version",		no_argument,	NULL,	'V'},
+		{"verbose",		no_argument,	NULL,	'v'},
+		{"addr-no-randomize",	no_argument,	NULL,	'R'},
+		{"fdpic-funcptrs",	no_argument,	NULL,	'F'},
+		{"mmap-page-zero",	no_argument,	NULL,	'Z'},
+		{"addr-compat-layout",	no_argument,	NULL,	'L'},
+		{"read-implies-exec",	no_argument,	NULL,	'X'},
+		{"32bit",		no_argument,	NULL,	'B'},
+		{"short-inode",		no_argument,	NULL,	'I'},
+		{"whole-seconds",	no_argument,	NULL,	'S'},
+		{"sticky-timeouts",	no_argument,	NULL,	'T'},
+		{"3gb",			no_argument,	NULL,	'3'},
+		{"4gb",			no_argument,	NULL,	OPT_4GB},
+		{"uname-2.6",		no_argument,	NULL,	OPT_UNAME26},
+		{"list",		no_argument,	NULL,	OPT_LIST},
+		{NULL,			0,		NULL,	0}
+	};
+
+	setlocale(LC_ALL, "");
+	bindtextdomain(PACKAGE, LOCALEDIR);
+	textdomain(PACKAGE);
+	close_stdout_atexit();
+
+	if (argc < 1) {
+		warnx(_("Not enough arguments"));
+		errtryhelp(EXIT_FAILURE);
+	}
+	archwrapper = strcmp(program_invocation_short_name, "setarch") != 0;
+	if (archwrapper) {
+		arch = program_invocation_short_name;	/* symlinks to setarch */
+
+		/* Don't use ifdef sparc here, we get "Unrecognized architecture"
+		 * error message later if necessary */
+		if (strcmp(arch, "sparc32bash") == 0) {
+			shell = "/bin/bash";
+			shell_arg = "";
+			goto set_arch;
+		}
+	} else {
+		if (1 < argc && *argv[1] != '-') {
+			arch = argv[1];
+			argv[1] = argv[0];	/* for getopt_long() to get the program name */
+			argv++;
+			argc--;
+		}
+	}
+
+	while ((c = getopt_long(argc, argv, "+hVv3BFILRSTXZ", longopts, NULL)) != -1) {
+		switch (c) {
+		case 'v':
+			verbose = 1;
+			break;
+		case 'R':
+			turn_on(ADDR_NO_RANDOMIZE, options);
+			break;
+		case 'F':
+			turn_on(FDPIC_FUNCPTRS, options);
+			break;
+		case 'Z':
+			turn_on(MMAP_PAGE_ZERO, options);
+			break;
+		case 'L':
+			turn_on(ADDR_COMPAT_LAYOUT, options);
+			break;
+		case 'X':
+			turn_on(READ_IMPLIES_EXEC, options);
+			break;
+		case 'B':
+			turn_on(ADDR_LIMIT_32BIT, options);
+			break;
+		case 'I':
+			turn_on(SHORT_INODE, options);
+			break;
+		case 'S':
+			turn_on(WHOLE_SECONDS, options);
+			break;
+		case 'T':
+			turn_on(STICKY_TIMEOUTS, options);
+			break;
+		case '3':
+			turn_on(ADDR_LIMIT_3GB, options);
+			break;
+		case OPT_4GB:	/* just ignore this one */
+			break;
+		case OPT_UNAME26:
+			turn_on(UNAME26, options);
+			break;
+		case OPT_LIST:
+			if (!archwrapper) {
+				list_arch_domains(init_arch_domains());
+				return EXIT_SUCCESS;
+			} else
+				warnx(_("unrecognized option '--list'"));
+			/* fallthrough */
+
+		default:
+			errtryhelp(EXIT_FAILURE);
+		case 'h':
+			usage(archwrapper);
+		case 'V':
+			print_version(EXIT_SUCCESS);
+		}
+	}
+
+	if (!arch && !options)
+		errx(EXIT_FAILURE, _("no architecture argument or personality flags specified"));
+
+	argc -= optind;
+	argv += optind;
+
+set_arch:
+	/* get execution domain (architecture) */
+	if (arch) {
+		doms = init_arch_domains();
+		target = get_arch_domain(doms, arch);
+
+		if (!target)
+			errx(EXIT_FAILURE, _("%s: Unrecognized architecture"), arch);
+		pers_value = target->perval;
+	}
+
+	/* add personality flags */
+	pers_value |= options;
+
+	/* call kernel */
+	if (personality(pers_value) < 0) {
+		/*
+		 * Depending on architecture and kernel version, personality
+		 * syscall is either capable or incapable of returning an error.
+		 * If the return value is not an error, then it's the previous
+		 * personality value, which can be an arbitrary value
+		 * undistinguishable from an error value.
+		 * To make things clear, a second call is needed.
+		 */
+		if (personality(pers_value) < 0)
+			err(EXIT_FAILURE, _("failed to set personality to %s"), arch);
+	}
+
+	/* make sure architecture is set as expected */
+	if (arch)
+		verify_arch_domain(doms, target, arch);
+
+	if (!argc) {
+		shell = "/bin/sh";
+		shell_arg = "-sh";
+	}
+	if (verbose) {
+		printf(_("Execute command `%s'.\n"), shell ? shell : argv[0]);
+		/* flush all output streams before exec */
+		fflush(NULL);
+	}
+
+	/* Execute shell */
+	if (shell) {
+		execl(shell, shell_arg, (char *)NULL);
+		errexec(shell);
+	}
+
+	/* Execute on command line specified command */
+	execvp(argv[0], argv);
+	errexec(argv[0]);
+}