From aa07f5ecf9828bb2ff8d796cb0b17ad8534201c7 Mon Sep 17 00:00:00 2001
From: Maxim Ostapenko <m.ostapenko@partner.samsung.com>
Date: Fri, 2 May 2014 11:17:07 +0300
Subject: [PATCH] linux-user: Add /proc/self/exe open forwarding

QEMU already supports /proc/self/{maps,stat,auxv} so addition of
/proc/self/exe is rather trivial.

Fixes https://bugs.launchpad.net/qemu/+bug/1299190

Signed-off-by: Maxim Ostapenko <m.ostapenko@partner.samsung.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/syscall.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 9864813b7a..5203cc4577 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -5225,6 +5225,11 @@ static int do_open(void *cpu_env, const char *pathname, int flags, mode_t mode)
         { NULL, NULL, NULL }
     };
 
+    if (is_proc_myself(pathname, "exe")) {
+        int execfd = qemu_getauxval(AT_EXECFD);
+        return execfd ? execfd : get_errno(open(exec_path, flags, mode));
+    }
+
     for (fake_open = fakes; fake_open->filename; fake_open++) {
         if (fake_open->cmp(pathname, fake_open->filename)) {
             break;