introduce environment variables for all qemu-user options

(Edits by Riku Voipio to apply to current HEAD)

Rework option parsing code for linux-user in a table-driven manner to allow
environment variables for all commandline options.

Also generate usage() output from option table.

Fix complains from checkpatch.pl, also have envlist global

Signed-off-by: Johannes Schauer <j.schauer@email.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Johannes Schauer 2011-08-06 08:54:12 +02:00 committed by Riku Voipio
parent a790ae389b
commit fc9c54124d

View file

@ -39,6 +39,11 @@
char *exec_path;
int singlestep;
const char *filename;
const char *argv0;
int gdbstub_port;
envlist_t *envlist;
const char *cpu_model;
unsigned long mmap_min_addr;
#if defined(CONFIG_USE_GUEST_BASE)
unsigned long guest_base;
@ -46,6 +51,8 @@ int have_guest_base;
unsigned long reserved_va;
#endif
static void usage(void);
static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
const char *qemu_uname_release = CONFIG_UNAME_RELEASE;
@ -2879,57 +2886,6 @@ void cpu_loop(CPUS390XState *env)
#endif /* TARGET_S390X */
static void version(void)
{
printf("qemu-" TARGET_ARCH " version " QEMU_VERSION QEMU_PKGVERSION
", Copyright (c) 2003-2008 Fabrice Bellard\n");
}
static void usage(void)
{
version();
printf("usage: qemu-" TARGET_ARCH " [options] program [arguments...]\n"
"Linux CPU emulator (compiled for %s emulation)\n"
"\n"
"Standard options:\n"
"-h print this help\n"
"-version display version information and exit\n"
"-g port wait gdb connection to port\n"
"-L path set the elf interpreter prefix (default=%s)\n"
"-s size set the stack size in bytes (default=%ld)\n"
"-cpu model select CPU (-cpu ? for list)\n"
"-drop-ld-preload drop LD_PRELOAD for target process\n"
"-E var=value sets/modifies targets environment variable(s)\n"
"-U var unsets targets environment variable(s)\n"
"-0 argv0 forces target process argv[0] to be argv0\n"
#if defined(CONFIG_USE_GUEST_BASE)
"-B address set guest_base address to address\n"
"-R size reserve size bytes for guest virtual address space\n"
#endif
"\n"
"Debug options:\n"
"-d options activate log (logfile=%s)\n"
"-p pagesize set the host page size to 'pagesize'\n"
"-singlestep always run in singlestep mode\n"
"-strace log system calls\n"
"\n"
"Environment variables:\n"
"QEMU_STRACE Print system calls and arguments similar to the\n"
" 'strace' program. Enable by setting to any value.\n"
"You can use -E and -U options to set/unset environment variables\n"
"for target process. It is possible to provide several variables\n"
"by repeating the option. For example:\n"
" -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
"Note that if you provide several changes to single variable\n"
"last change will stay in effect.\n"
,
TARGET_ARCH,
interp_prefix,
guest_stack_size,
DEBUG_LOGFILE);
exit(1);
}
THREAD CPUState *thread_env;
void task_settid(TaskState *ts)
@ -2965,26 +2921,358 @@ void init_task_state(TaskState *ts)
}
ts->sigqueue_table[i].next = NULL;
}
static void handle_arg_help(const char *arg)
{
usage();
}
static void handle_arg_log(const char *arg)
{
int mask;
const CPULogItem *item;
mask = cpu_str_to_log_mask(arg);
if (!mask) {
printf("Log items (comma separated):\n");
for (item = cpu_log_items; item->mask != 0; item++) {
printf("%-10s %s\n", item->name, item->help);
}
exit(1);
}
cpu_set_log(mask);
}
static void handle_arg_set_env(const char *arg)
{
char *r, *p, *token;
r = p = strdup(arg);
while ((token = strsep(&p, ",")) != NULL) {
if (envlist_setenv(envlist, token) != 0) {
usage();
}
}
free(r);
}
static void handle_arg_unset_env(const char *arg)
{
char *r, *p, *token;
r = p = strdup(arg);
while ((token = strsep(&p, ",")) != NULL) {
if (envlist_unsetenv(envlist, token) != 0) {
usage();
}
}
free(r);
}
static void handle_arg_argv0(const char *arg)
{
argv0 = strdup(arg);
}
static void handle_arg_stack_size(const char *arg)
{
char *p;
guest_stack_size = strtoul(arg, &p, 0);
if (guest_stack_size == 0) {
usage();
}
if (*p == 'M') {
guest_stack_size *= 1024 * 1024;
} else if (*p == 'k' || *p == 'K') {
guest_stack_size *= 1024;
}
}
static void handle_arg_ld_prefix(const char *arg)
{
interp_prefix = strdup(arg);
}
static void handle_arg_pagesize(const char *arg)
{
qemu_host_page_size = atoi(arg);
if (qemu_host_page_size == 0 ||
(qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
fprintf(stderr, "page size must be a power of two\n");
exit(1);
}
}
static void handle_arg_gdb(const char *arg)
{
gdbstub_port = atoi(arg);
}
static void handle_arg_uname(const char *arg)
{
qemu_uname_release = strdup(arg);
}
static void handle_arg_cpu(const char *arg)
{
cpu_model = strdup(arg);
if (cpu_model == NULL || strcmp(cpu_model, "?") == 0) {
/* XXX: implement xxx_cpu_list for targets that still miss it */
#if defined(cpu_list_id)
cpu_list_id(stdout, &fprintf, "");
#elif defined(cpu_list)
cpu_list(stdout, &fprintf); /* deprecated */
#endif
exit(1);
}
}
#if defined(CONFIG_USE_GUEST_BASE)
static void handle_arg_guest_base(const char *arg)
{
guest_base = strtol(arg, NULL, 0);
have_guest_base = 1;
}
static void handle_arg_reserved_va(const char *arg)
{
char *p;
int shift = 0;
reserved_va = strtoul(arg, &p, 0);
switch (*p) {
case 'k':
case 'K':
shift = 10;
break;
case 'M':
shift = 20;
break;
case 'G':
shift = 30;
break;
}
if (shift) {
unsigned long unshifted = reserved_va;
p++;
reserved_va <<= shift;
if (((reserved_va >> shift) != unshifted)
#if HOST_LONG_BITS > TARGET_VIRT_ADDR_SPACE_BITS
|| (reserved_va > (1ul << TARGET_VIRT_ADDR_SPACE_BITS))
#endif
) {
fprintf(stderr, "Reserved virtual address too big\n");
exit(1);
}
}
if (*p) {
fprintf(stderr, "Unrecognised -R size suffix '%s'\n", p);
exit(1);
}
}
#endif
static void handle_arg_singlestep(const char *arg)
{
singlestep = 1;
}
static void handle_arg_strace(const char *arg)
{
do_strace = 1;
}
static void handle_arg_version(const char *arg)
{
printf("qemu-" TARGET_ARCH " version " QEMU_VERSION QEMU_PKGVERSION
", Copyright (c) 2003-2008 Fabrice Bellard\n");
}
struct qemu_argument {
const char *argv;
const char *env;
bool has_arg;
void (*handle_opt)(const char *arg);
const char *example;
const char *help;
};
struct qemu_argument arg_table[] = {
{"h", "", false, handle_arg_help,
"", "print this help"},
{"g", "QEMU_GDB", true, handle_arg_gdb,
"port", "wait gdb connection to 'port'"},
{"L", "QEMU_LD_PREFIX", true, handle_arg_ld_prefix,
"path", "set the elf interpreter prefix to 'path'"},
{"s", "QEMU_STACK_SIZE", true, handle_arg_stack_size,
"size", "set the stack size to 'size' bytes"},
{"cpu", "QEMU_CPU", true, handle_arg_cpu,
"model", "select CPU (-cpu ? for list)"},
{"E", "QEMU_SET_ENV", true, handle_arg_set_env,
"var=value", "sets targets environment variable (see below)"},
{"U", "QEMU_UNSET_ENV", true, handle_arg_unset_env,
"var", "unsets targets environment variable (see below)"},
{"0", "QEMU_ARGV0", true, handle_arg_argv0,
"argv0", "forces target process argv[0] to be 'argv0'"},
{"r", "QEMU_UNAME", true, handle_arg_uname,
"uname", "set qemu uname release string to 'uname'"},
#if defined(CONFIG_USE_GUEST_BASE)
{"B", "QEMU_GUEST_BASE", true, handle_arg_guest_base,
"address", "set guest_base address to 'address'"},
{"R", "QEMU_RESERVED_VA", true, handle_arg_reserved_va,
"size", "reserve 'size' bytes for guest virtual address space"},
#endif
{"d", "QEMU_LOG", true, handle_arg_log,
"options", "activate log"},
{"p", "QEMU_PAGESIZE", true, handle_arg_pagesize,
"pagesize", "set the host page size to 'pagesize'"},
{"singlestep", "QEMU_SINGLESTEP", false, handle_arg_singlestep,
"", "run in singlestep mode"},
{"strace", "QEMU_STRACE", false, handle_arg_strace,
"", "log system calls"},
{"version", "QEMU_VERSION", false, handle_arg_version,
"", "log system calls"},
{NULL, NULL, false, NULL, NULL, NULL}
};
static void usage(void)
{
struct qemu_argument *arginfo;
int maxarglen;
int maxenvlen;
printf("usage: qemu-" TARGET_ARCH " [options] program [arguments...]\n"
"Linux CPU emulator (compiled for " TARGET_ARCH " emulation)\n"
"\n"
"Options and associated environment variables:\n"
"\n");
maxarglen = maxenvlen = 0;
for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) {
if (strlen(arginfo->env) > maxenvlen) {
maxenvlen = strlen(arginfo->env);
}
if (strlen(arginfo->argv) > maxarglen) {
maxarglen = strlen(arginfo->argv);
}
}
printf("%-*s%-*sDescription\n", maxarglen+3, "Argument",
maxenvlen+1, "Env-variable");
for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) {
if (arginfo->has_arg) {
printf("-%s %-*s %-*s %s\n", arginfo->argv,
(int)(maxarglen-strlen(arginfo->argv)), arginfo->example,
maxenvlen, arginfo->env, arginfo->help);
} else {
printf("-%-*s %-*s %s\n", maxarglen+1, arginfo->argv,
maxenvlen, arginfo->env,
arginfo->help);
}
}
printf("\n"
"Defaults:\n"
"QEMU_LD_PREFIX = %s\n"
"QEMU_STACK_SIZE = %ld byte\n"
"QEMU_LOG = %s\n",
interp_prefix,
guest_stack_size,
DEBUG_LOGFILE);
printf("\n"
"You can use -E and -U options or the QEMU_SET_ENV and\n"
"QEMU_UNSET_ENV environment variables to set and unset\n"
"environment variables for the target process.\n"
"It is possible to provide several variables by separating them\n"
"by commas in getsubopt(3) style. Additionally it is possible to\n"
"provide the -E and -U options multiple times.\n"
"The following lines are equivalent:\n"
" -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
" -E var1=val2,var2=val2 -U LD_PRELOAD,LD_DEBUG\n"
" QEMU_SET_ENV=var1=val2,var2=val2 QEMU_UNSET_ENV=LD_PRELOAD,LD_DEBUG\n"
"Note that if you provide several changes to a single variable\n"
"the last change will stay in effect.\n");
exit(1);
}
static int parse_args(int argc, char **argv)
{
const char *r;
int optind;
struct qemu_argument *arginfo;
for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) {
if (arginfo->env == NULL) {
continue;
}
r = getenv(arginfo->env);
if (r != NULL) {
arginfo->handle_opt(r);
}
}
optind = 1;
for (;;) {
if (optind >= argc) {
break;
}
r = argv[optind];
if (r[0] != '-') {
break;
}
optind++;
r++;
if (!strcmp(r, "-")) {
break;
}
for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) {
if (!strcmp(r, arginfo->argv)) {
if (optind >= argc) {
usage();
}
arginfo->handle_opt(argv[optind]);
if (arginfo->has_arg) {
optind++;
}
break;
}
}
/* no option matched the current argv */
if (arginfo->handle_opt == NULL) {
usage();
}
}
if (optind >= argc) {
usage();
}
filename = argv[optind];
exec_path = argv[optind];
return optind;
}
int main(int argc, char **argv, char **envp)
{
const char *filename;
const char *cpu_model;
const char *log_file = DEBUG_LOGFILE;
const char *log_mask = NULL;
struct target_pt_regs regs1, *regs = &regs1;
struct image_info info1, *info = &info1;
struct linux_binprm bprm;
TaskState *ts;
CPUState *env;
int optind;
const char *r;
int gdbstub_port = 0;
char **target_environ, **wrk;
char **target_argv;
int target_argc;
envlist_t *envlist = NULL;
const char *argv0 = NULL;
int i;
int ret;
@ -3019,156 +3307,9 @@ int main(int argc, char **argv, char **envp)
cpudef_setup(); /* parse cpu definitions in target config file (TBD) */
#endif
optind = 1;
for(;;) {
if (optind >= argc)
break;
r = argv[optind];
if (r[0] != '-')
break;
optind++;
r++;
if (!strcmp(r, "-")) {
break;
} else if (!strcmp(r, "d")) {
if (optind >= argc) {
break;
}
log_mask = argv[optind++];
} else if (!strcmp(r, "D")) {
if (optind >= argc) {
break;
}
log_file = argv[optind++];
} else if (!strcmp(r, "E")) {
r = argv[optind++];
if (envlist_setenv(envlist, r) != 0)
usage();
} else if (!strcmp(r, "ignore-environment")) {
envlist_free(envlist);
if ((envlist = envlist_create()) == NULL) {
(void) fprintf(stderr, "Unable to allocate envlist\n");
exit(1);
}
} else if (!strcmp(r, "U")) {
r = argv[optind++];
if (envlist_unsetenv(envlist, r) != 0)
usage();
} else if (!strcmp(r, "0")) {
r = argv[optind++];
argv0 = r;
} else if (!strcmp(r, "s")) {
if (optind >= argc)
break;
r = argv[optind++];
guest_stack_size = strtoul(r, (char **)&r, 0);
if (guest_stack_size == 0)
usage();
if (*r == 'M')
guest_stack_size *= 1024 * 1024;
else if (*r == 'k' || *r == 'K')
guest_stack_size *= 1024;
} else if (!strcmp(r, "L")) {
interp_prefix = argv[optind++];
} else if (!strcmp(r, "p")) {
if (optind >= argc)
break;
qemu_host_page_size = atoi(argv[optind++]);
if (qemu_host_page_size == 0 ||
(qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
fprintf(stderr, "page size must be a power of two\n");
exit(1);
}
} else if (!strcmp(r, "g")) {
if (optind >= argc)
break;
gdbstub_port = atoi(argv[optind++]);
} else if (!strcmp(r, "r")) {
qemu_uname_release = argv[optind++];
} else if (!strcmp(r, "cpu")) {
cpu_model = argv[optind++];
if (cpu_model == NULL || strcmp(cpu_model, "?") == 0) {
/* XXX: implement xxx_cpu_list for targets that still miss it */
#if defined(cpu_list_id)
cpu_list_id(stdout, &fprintf, "");
#elif defined(cpu_list)
cpu_list(stdout, &fprintf); /* deprecated */
#endif
exit(1);
}
#if defined(CONFIG_USE_GUEST_BASE)
} else if (!strcmp(r, "B")) {
guest_base = strtol(argv[optind++], NULL, 0);
have_guest_base = 1;
} else if (!strcmp(r, "R")) {
char *p;
int shift = 0;
reserved_va = strtoul(argv[optind++], &p, 0);
switch (*p) {
case 'k':
case 'K':
shift = 10;
break;
case 'M':
shift = 20;
break;
case 'G':
shift = 30;
break;
}
if (shift) {
unsigned long unshifted = reserved_va;
p++;
reserved_va <<= shift;
if (((reserved_va >> shift) != unshifted)
#if HOST_LONG_BITS > TARGET_VIRT_ADDR_SPACE_BITS
|| (reserved_va > (1ul << TARGET_VIRT_ADDR_SPACE_BITS))
#endif
) {
fprintf(stderr, "Reserved virtual address too big\n");
exit(1);
}
}
if (*p) {
fprintf(stderr, "Unrecognised -R size suffix '%s'\n", p);
exit(1);
}
#endif
} else if (!strcmp(r, "drop-ld-preload")) {
(void) envlist_unsetenv(envlist, "LD_PRELOAD");
} else if (!strcmp(r, "singlestep")) {
singlestep = 1;
} else if (!strcmp(r, "strace")) {
do_strace = 1;
} else if (!strcmp(r, "version")) {
version();
exit(0);
} else {
usage();
}
}
/* init debug */
cpu_set_log_filename(log_file);
if (log_mask) {
int mask;
const CPULogItem *item;
mask = cpu_str_to_log_mask(log_mask);
if (!mask) {
printf("Log items (comma separated):\n");
for (item = cpu_log_items; item->mask != 0; item++) {
printf("%-10s %s\n", item->name, item->help);
}
exit(1);
}
cpu_set_log(mask);
}
if (optind >= argc) {
usage();
}
filename = argv[optind];
exec_path = argv[optind];
optind = parse_args(argc, argv);
/* Zero out regs */
memset(regs, 0, sizeof(struct target_pt_regs));