From 163a05a8398bc4b56c7498fa9901422a159168bf Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Mon, 27 Jun 2011 17:44:52 +0100 Subject: linux-user: Implement prlimit64 syscall Implement the prlimit64 syscall. Slightly modified to apply upstream -Riku Signed-off-by: Peter Maydell Signed-off-by: Riku Voipio --- linux-user/syscall.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) (limited to 'linux-user/syscall.c') diff --git a/linux-user/syscall.c b/linux-user/syscall.c index fed7a8fe0f..e2f356bb96 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -559,6 +559,21 @@ _syscall6(int, sys_pselect6, int, nfds, fd_set *, readfds, fd_set *, writefds, fd_set *, exceptfds, struct timespec *, timeout, void *, sig); #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); @@ -7989,6 +8004,34 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, break; } #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: -- cgit v1.2.3