From: Warner Losh <i...@freebsd.org>
Eliminate the x86 specific stack stuff in favor of more generic control
over the process size:
target_maxtsiz max text size
target_dfldsiz initial data size limit
target_maxdsiz max data size
target_dflssiz initial stack size limit
target_maxssiz max stack size
target_sgrowsiz amount to grow stack
These can be set on a per-arch basis, and the stack size can be set
on the command line. Adjust the stack size parameters at startup.
Signed-off-by: Stacey Son <s...@freebsd.org>
Signed-off-by: Warner Losh <i...@bsdimp.com>
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
---
bsd-user/elfload.c | 2 +-
bsd-user/main.c | 52 +++++++++++++++++++++++++++++++++-------------
bsd-user/qemu.h | 7 ++++++-
3 files changed, 45 insertions(+), 16 deletions(-)
diff --git a/bsd-user/elfload.c b/bsd-user/elfload.c
index c28ef34143..59465b71d4 100644
--- a/bsd-user/elfload.c
+++ b/bsd-user/elfload.c
@@ -204,7 +204,7 @@ static abi_ulong setup_arg_pages(abi_ulong p, struct
bsd_binprm *bprm,
/* Create enough stack to hold everything. If we don't use
* it for args, we'll use it for something else...
*/
- size = x86_stack_size;
+ size = target_dflssiz;
if (size < MAX_ARG_PAGES * TARGET_PAGE_SIZE)
size = MAX_ARG_PAGES * TARGET_PAGE_SIZE;
error = target_mmap(0,
diff --git a/bsd-user/main.c b/bsd-user/main.c
index 3d4ed202a0..19bf3a09a7 100644
--- a/bsd-user/main.c
+++ b/bsd-user/main.c
@@ -18,6 +18,11 @@
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/sysctl.h>
+
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qemu/units.h"
@@ -44,8 +49,6 @@
#include "host-os.h"
#include "target_arch_cpu.h"
-#include <sys/sysctl.h>
-
int singlestep;
unsigned long mmap_min_addr;
uintptr_t guest_base;
@@ -57,12 +60,12 @@ const char *qemu_uname_release;
enum BSDType bsd_type;
char qemu_proc_pathname[PATH_MAX]; /* full path to exeutable */
-/*
- * XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
- * we allocate a bigger stack. Need a better solution, for example
- * by remapping the process stack directly at the right place
- */
-unsigned long x86_stack_size = 512 * 1024;
+unsigned long target_maxtsiz = TARGET_MAXTSIZ; /* max text size */
+unsigned long target_dfldsiz = TARGET_DFLDSIZ; /* initial data size limit */
+unsigned long target_maxdsiz = TARGET_MAXDSIZ; /* max data size */
+unsigned long target_dflssiz = TARGET_DFLSSIZ; /* initial data size limit */
+unsigned long target_maxssiz = TARGET_MAXSSIZ; /* max stack size */
+unsigned long target_sgrowsiz = TARGET_SGROWSIZ; /* amount to grow stack */
void gemu_log(const char *fmt, ...)
{
@@ -112,7 +115,6 @@ static void usage(void)
"-d item1[,...] enable logging of specified items\n"
" (use '-d help' for a list of log items)\n"
"-D logfile write logs to 'logfile' (default stderr)\n"
- "-p pagesize set the host page size to 'pagesize'\n"
"-singlestep always run in singlestep mode\n"
"-strace log system calls\n"
"-trace
[[enable=]<pattern>][,events=<file>][,file=<file>]\n"
@@ -132,7 +134,7 @@ static void usage(void)
,
TARGET_NAME,
interp_prefix,
- x86_stack_size);
+ target_dflssiz);
exit(1);
}
@@ -161,6 +163,23 @@ void init_task_state(TaskState *ts)
ts->sigqueue_table[i].next = NULL;
}
+static void
+adjust_ssize(void)
+{
+ struct rlimit rl;
+
+ if (getrlimit(RLIMIT_STACK, &rl) != 0) {
+ return;
+ }
+
+ target_maxssiz = MIN(target_maxssiz, rl.rlim_max);
+ target_dflssiz = MIN(MAX(target_dflssiz, rl.rlim_cur), target_maxssiz);
+
+ rl.rlim_max = target_maxssiz;
+ rl.rlim_cur = target_dflssiz;
+ setrlimit(RLIMIT_STACK, &rl);
+}
+
static void save_proc_pathname(char *argv0)
{
int mib[4];
@@ -197,6 +216,8 @@ int main(int argc, char **argv)
envlist_t *envlist = NULL;
bsd_type = HOST_DEFAULT_BSD_TYPE;
+ adjust_ssize();
+
if (argc <= 1) {
usage();
}
@@ -257,14 +278,17 @@ int main(int argc, char **argv)
}
} else if (!strcmp(r, "s")) {
r = argv[optind++];
- rv = qemu_strtoul(r, &r, 0, &x86_stack_size);
- if (rv < 0 || x86_stack_size <= 0) {
+ rv = qemu_strtoul(r, &r, 0, &target_dflssiz);
+ if (rv < 0 || target_dflssiz <= 0) {
usage();
}
if (*r == 'M') {
- x86_stack_size *= MiB;
+ target_dflssiz *= 1024 * 1024;
} else if (*r == 'k' || *r == 'K') {
- x86_stack_size *= KiB;
+ target_dflssiz *= 1024;
+ }
+ if (target_dflssiz > target_maxssiz) {
+ usage();
}
} else if (!strcmp(r, "L")) {
interp_prefix = argv[optind++];
diff --git a/bsd-user/qemu.h b/bsd-user/qemu.h
index 1b37757e06..21efa7d777 100644
--- a/bsd-user/qemu.h
+++ b/bsd-user/qemu.h
@@ -219,7 +219,12 @@ void mmap_fork_end(int child);
/* main.c */
extern char qemu_proc_pathname[];
-extern unsigned long x86_stack_size;
+extern unsigned long target_maxtsiz;
+extern unsigned long target_dfldsiz;
+extern unsigned long target_maxdsiz;
+extern unsigned long target_dflssiz;
+extern unsigned long target_maxssiz;
+extern unsigned long target_sgrowsiz;
/* user access */
--
2.32.0
