virtualization/app-emulation/qemu/files/0.14.1/0021-implement-prlimit64-syscall.patch

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From agraf@suse.de Thu, 29 Sep 2011 11:00:25 +0200
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From: Alexander Graf <agraf@suse.de>
To: adrian@suse.de
Cc: Peter Maydell <peter.maydell@linaro.org>, Riku Voipio <riku.voipio@linaro.org>
Subject: [PATCH] linux-user: Implement prlimit64 syscall
Date: Thu, 29 Sep 2011 11:00:25 +0200
Message-Id: <1317286825-2033-1-git-send-email-agraf@suse.de>
X-Mailer: git-send-email 1.6.0.2
From: Peter Maydell <peter.maydell@linaro.org>
Implement the prlimit64 syscall.
Slightly modified to apply upstream -Riku
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Index: qemu-0.14.1/linux-user/syscall.c
===================================================================
--- qemu-0.14.1.orig/linux-user/syscall.c
+++ qemu-0.14.1/linux-user/syscall.c
@@ -524,6 +524,21 @@ static int sys_inotify_init1(int flags)
#endif /* CONFIG_INOTIFY */
+#if defined(TARGET_NR_prlimit64)
+#ifndef __NR_prlimit64
+# define __NR_prlimit64 -1
+#endif
+#define __NR_sys_prlimit64 __NR_prlimit64
+/* The glibc rlimit structure may not be that used by the underlying syscall */
+struct host_rlimit64 {
+ uint64_t rlim_cur;
+ uint64_t rlim_max;
+};
+_syscall4(int, sys_prlimit64, pid_t, pid, int, resource,
+ const struct host_rlimit64 *, new_limit,
+ struct host_rlimit64 *, old_limit)
+#endif
+
extern int personality(int);
extern int flock(int, int);
extern int setfsuid(int);
@@ -7620,6 +7635,34 @@ abi_long do_syscall(void *cpu_env, int n
break;
}
#endif
+#ifdef TARGET_NR_prlimit64
+ case TARGET_NR_prlimit64:
+ {
+ /* args: pid, resource number, ptr to new rlimit, ptr to old rlimit */
+ struct target_rlimit64 *target_rnew, *target_rold;
+ struct host_rlimit64 rnew, rold, *rnewp = 0;
+ if (arg3) {
+ if (!lock_user_struct(VERIFY_READ, target_rnew, arg3, 1)) {
+ goto efault;
+ }
+ rnew.rlim_cur = tswap64(target_rnew->rlim_cur);
+ rnew.rlim_max = tswap64(target_rnew->rlim_max);
+ unlock_user_struct(target_rnew, arg3, 0);
+ rnewp = &rnew;
+ }
+
+ ret = get_errno(sys_prlimit64(arg1, arg2, rnewp, arg4 ? &rold : 0));
+ if (!is_error(ret) && arg4) {
+ if (!lock_user_struct(VERIFY_WRITE, target_rold, arg4, 1)) {
+ goto efault;
+ }
+ target_rold->rlim_cur = tswap64(rold.rlim_cur);
+ target_rold->rlim_max = tswap64(rold.rlim_max);
+ unlock_user_struct(target_rold, arg4, 1);
+ }
+ break;
+ }
+#endif
default:
unimplemented:
Index: qemu-0.14.1/linux-user/syscall_defs.h
===================================================================
--- qemu-0.14.1.orig/linux-user/syscall_defs.h
+++ qemu-0.14.1/linux-user/syscall_defs.h
@@ -2237,6 +2237,11 @@ struct target_mq_attr {
abi_long mq_curmsgs;
};
+struct target_rlimit64 {
+ uint64_t rlim_cur;
+ uint64_t rlim_max;
+};
+
#include "socket.h"
#include "errno_defs.h"