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| author | Timothy E Baldwin <T.E.Baldwin99@members.leeds.ac.uk> | 2016-05-12 18:47:49 +0100 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@linaro.org> | 2016-05-27 14:50:38 +0300 |
| commit | 4af80a3783950380df85ecca78aea3e3bad2e846 (patch) | |
| tree | 8b74f6b1ff3ce4d8c6e477cb3a4a44f12bee37ac | |
| parent | c10a07387b77b94d8f7233f3b5bb559211d4e49a (diff) | |
| download | qemu-4af80a3783950380df85ecca78aea3e3bad2e846.zip | |
linux-user: Use safe_syscall for wait system calls
Use safe_syscall for waitpid, waitid and wait4 syscalls. Note that this
change allows us to implement support for waitid's fifth (rusage) argument
in future; for the moment we ignore it as we have done up til now.
Signed-off-by: Timothy Edward Baldwin <T.E.Baldwin99@members.leeds.ac.uk>
Message-id: 1441497448-32489-18-git-send-email-T.E.Baldwin99@members.leeds.ac.uk
[PMM: Adjust to new safe_syscall convention. Add fifth waitid syscall argument
(which isn't present in the libc interface but is in the syscall ABI)]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
| -rw-r--r-- | linux-user/syscall.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 0037ee7dd7..d9f4695624 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -699,6 +699,10 @@ safe_syscall3(ssize_t, read, int, fd, void *, buff, size_t, count) safe_syscall3(ssize_t, write, int, fd, const void *, buff, size_t, count) safe_syscall4(int, openat, int, dirfd, const char *, pathname, \ int, flags, mode_t, mode) +safe_syscall4(pid_t, wait4, pid_t, pid, int *, status, int, options, \ + struct rusage *, rusage) +safe_syscall5(int, waitid, idtype_t, idtype, id_t, id, siginfo_t *, infop, \ + int, options, struct rusage *, rusage) static inline int host_to_target_sock_type(int host_type) { @@ -6037,7 +6041,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, case TARGET_NR_waitpid: { int status; - ret = get_errno(waitpid(arg1, &status, arg3)); + ret = get_errno(safe_wait4(arg1, &status, arg3, 0)); if (!is_error(ret) && arg2 && ret && put_user_s32(host_to_target_waitstatus(status), arg2)) goto efault; @@ -6049,7 +6053,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, { siginfo_t info; info.si_pid = 0; - ret = get_errno(waitid(arg1, arg2, &info, arg4)); + ret = get_errno(safe_waitid(arg1, arg2, &info, arg4, NULL)); if (!is_error(ret) && arg3 && info.si_pid != 0) { if (!(p = lock_user(VERIFY_WRITE, arg3, sizeof(target_siginfo_t), 0))) goto efault; @@ -7761,7 +7765,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, rusage_ptr = &rusage; else rusage_ptr = NULL; - ret = get_errno(wait4(arg1, &status, arg3, rusage_ptr)); + ret = get_errno(safe_wait4(arg1, &status, arg3, rusage_ptr)); if (!is_error(ret)) { if (status_ptr && ret) { status = host_to_target_waitstatus(status); |