Implement the prlimit64 syscall.
Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
---
linux-user/syscall.c | 43 +++++++++++++++++++++++++++++++++++++++++++
linux-user/syscall_defs.h | 5 +++++
2 files changed, 48 insertions(+), 0 deletions(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 5cb27c7..2ec1c2b 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -550,6 +550,21 @@ _syscall5(int, sys_ppoll, struct pollfd *, fds, nfds_t,
nfds,
size_t, sigsetsize)
#endif
+#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);
@@ -7840,6 +7855,34 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
}
#endif
#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:
gemu_log("qemu: Unsupported syscall: %d\n", num);
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index 04c268d..e2700eb 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -2280,3 +2280,8 @@ struct target_epoll_event {
target_epoll_data_t data;
};
#endif
+
+struct target_rlimit64 {
+ uint64_t rlim_cur;
+ uint64_t rlim_max;
+};
--
1.7.4.1
