From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:46247) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RtKSP-00081B-IQ for qemu-devel@nongnu.org; Fri, 03 Feb 2012 09:49:51 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RtKSH-0001XQ-6a for qemu-devel@nongnu.org; Fri, 03 Feb 2012 09:49:45 -0500 Received: from afflict.kos.to ([92.243.29.197]:49781) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RtKSG-0001Wv-UQ for qemu-devel@nongnu.org; Fri, 03 Feb 2012 09:49:37 -0500 From: riku.voipio@linaro.org Date: Fri, 3 Feb 2012 16:49:17 +0200 Message-Id: <36c08d498b8ea6995666b805d37c6bb14da66a97.1328280144.git.riku.voipio@linaro.org> In-Reply-To: References: Subject: [Qemu-devel] [PATCH 04/19] linux-user: fake /proc/self/maps List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Alexander Graf From: Alexander Graf glibc's pthread_attr_getstack tries to find the stack range from /proc/self/maps. Unfortunately, /proc is usually the host's /proc which means linux-user guests see qemu's stack there. Fake the file with a constructed maps entry that exposes the guest's stack range. Signed-off-by: Alexander Graf Signed-off-by: Riku Voipio --- linux-user/syscall.c | 15 +++++++++++++++ 1 files changed, 15 insertions(+), 0 deletions(-) diff --git a/linux-user/syscall.c b/linux-user/syscall.c index e100025..1864d7f 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -4600,6 +4600,20 @@ int get_osversion(void) return osversion; } + +static int open_self_maps(void *cpu_env, int fd) +{ + TaskState *ts = ((CPUState *)cpu_env)->opaque; + + dprintf(fd, "%08llx-%08llx rw-p %08llx 00:00 0 [stack]\n", + (unsigned long long)ts->info->stack_limit, + (unsigned long long)(ts->stack_base + (TARGET_PAGE_SIZE - 1)) + & TARGET_PAGE_MASK, + (unsigned long long)ts->stack_base); + + return 0; +} + static int do_open(void *cpu_env, const char *pathname, int flags, mode_t mode) { struct fake_open { @@ -4608,6 +4622,7 @@ static int do_open(void *cpu_env, const char *pathname, int flags, mode_t mode) }; const struct fake_open *fake_open; static const struct fake_open fakes[] = { + { "/proc/self/maps", open_self_maps }, { NULL, NULL } }; -- 1.7.5.4