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linux-user: Implement prlimit64 syscall

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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>
This commit is contained in:
Peter Maydell 2011-06-27 17:44:52 +01:00 committed by Riku Voipio
parent d979e8eb54
commit 163a05a839
2 changed files with 47 additions and 0 deletions
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43
linux-user/syscall.c
View File

@ -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:

4
linux-user/syscall_defs.h
View File

@ -2293,3 +2293,7 @@ struct target_epoll_event {
target_epoll_data_t data;
};
#endif
struct target_rlimit64 {
uint64_t rlim_cur;
uint64_t rlim_max;
};