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X-Received-From: 2607:f8b0:4864:20::644 Subject: [Qemu-devel] [PATCH v6 19/49] linux-user: Split out wait4, waitid, waitpid X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: laurent@vivier.eu Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Note that waitid is universally provided and need not be conditional. Signed-off-by: Richard Henderson --- linux-user/syscall-defs.h | 5 ++ linux-user/syscall-proc.inc.c | 88 +++++++++++++++++++++++++++++++++++ linux-user/syscall.c | 67 -------------------------- linux-user/strace.list | 9 ---- 4 files changed, 93 insertions(+), 76 deletions(-) diff --git a/linux-user/syscall-defs.h b/linux-user/syscall-defs.h index 6f6f77927b..a84050a318 100644 --- a/linux-user/syscall-defs.h +++ b/linux-user/syscall-defs.h @@ -118,5 +118,10 @@ SYSCALL_DEF(shmget, ARG_DEC, ARG_DEC, ARG_HEX); /* Emulate vfork() with fork(). */ SYSCALL_DEF_FULL(vfork, .impl =3D impl_fork); #endif +SYSCALL_DEF(wait4, ARG_DEC, ARG_PTR, ARG_HEX, ARG_PTR); +SYSCALL_DEF(waitid, ARG_HEX, ARG_DEC, ARG_PTR, ARG_HEX); +#ifdef TARGET_NR_waitpid +SYSCALL_DEF(waitpid, ARG_DEC, ARG_PTR, ARG_HEX); +#endif SYSCALL_DEF(write, ARG_DEC, ARG_PTR, ARG_DEC); SYSCALL_DEF(writev, ARG_DEC, ARG_PTR, ARG_DEC); diff --git a/linux-user/syscall-proc.inc.c b/linux-user/syscall-proc.inc.c index b89ac56552..37f5bbe197 100644 --- a/linux-user/syscall-proc.inc.c +++ b/linux-user/syscall-proc.inc.c @@ -318,3 +318,91 @@ SYSCALL_IMPL(fork) return do_clone(cpu_env, TARGET_SIGCHLD, 0, 0, 0, 0); } #endif + +/* + * Map host to target signal numbers for the wait family of syscalls. + * Assume all other status bits are the same. + */ +int host_to_target_waitstatus(int status) +{ + if (WIFSIGNALED(status)) { + return host_to_target_signal(WTERMSIG(status)) | (status & ~0x7f); + } + if (WIFSTOPPED(status)) { + return (host_to_target_signal(WSTOPSIG(status)) << 8) + | (status & 0xff); + } + return status; +} + +SYSCALL_IMPL(wait4) +{ + int status; + pid_t pid =3D arg1; + abi_ulong status_ptr =3D arg2; + int options =3D arg3; + abi_ulong target_rusage =3D arg4; + struct rusage rusage; + struct rusage *rusage_ptr =3D target_rusage ? &rusage : NULL; + abi_long ret; + + ret =3D get_errno(safe_wait4(pid, &status, options, rusage_ptr)); + if (!is_error(ret)) { + if (status_ptr && ret) { + status =3D host_to_target_waitstatus(status); + if (put_user_s32(status, status_ptr)) { + return -TARGET_EFAULT; + } + } + if (target_rusage) { + abi_long err =3D host_to_target_rusage(target_rusage, &rusage); + if (err) { + ret =3D err; + } + } + } + return ret; +} + +SYSCALL_IMPL(waitid) +{ + idtype_t idtype =3D arg1; + id_t id =3D arg2; + abi_ulong target_info =3D arg3; + int options =3D arg4; + siginfo_t info, *info_ptr =3D target_info ? &info : NULL; + abi_long ret; + + info.si_pid =3D 0; + ret =3D get_errno(safe_waitid(idtype, id, info_ptr, options, NULL)); + if (!is_error(ret) && target_info && info.si_pid !=3D 0) { + target_siginfo_t *p =3D lock_user(VERIFY_WRITE, target_info, + sizeof(target_siginfo_t), 0); + if (!p) { + return -TARGET_EFAULT; + } + host_to_target_siginfo(p, &info); + unlock_user(p, target_info, sizeof(target_siginfo_t)); + } + return ret; +} + +#ifdef TARGET_NR_waitpid +SYSCALL_IMPL(waitpid) +{ + pid_t pid =3D arg1; + abi_ulong target_status =3D arg2; + int options =3D arg3; + int status; + abi_long ret; + + ret =3D get_errno(safe_wait4(pid, &status, options, NULL)); + if (!is_error(ret) + && target_status + && ret + && put_user_s32(host_to_target_waitstatus(status), target_status))= { + return -TARGET_EFAULT; + } + return ret; +} +#endif diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 1d18d28fbe..8da92dd188 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -5218,20 +5218,6 @@ static abi_long do_signalfd4(int fd, abi_long mask, = int flags) } #endif =20 -/* Map host to target signal numbers for the wait family of syscalls. - Assume all other status bits are the same. */ -int host_to_target_waitstatus(int status) -{ - if (WIFSIGNALED(status)) { - return host_to_target_signal(WTERMSIG(status)) | (status & ~0x7f); - } - if (WIFSTOPPED(status)) { - return (host_to_target_signal(WSTOPSIG(status)) << 8) - | (status & 0xff); - } - return status; -} - #define TIMER_MAGIC 0x0caf0000 #define TIMER_MAGIC_MASK 0xffff0000 =20 @@ -5344,32 +5330,6 @@ static abi_long do_syscall1(void *cpu_env, int num, = abi_long arg1, void *p; =20 switch(num) { -#ifdef TARGET_NR_waitpid - case TARGET_NR_waitpid: - { - int status; - ret =3D get_errno(safe_wait4(arg1, &status, arg3, 0)); - if (!is_error(ret) && arg2 && ret - && put_user_s32(host_to_target_waitstatus(status), arg2)) - return -TARGET_EFAULT; - } - return ret; -#endif -#ifdef TARGET_NR_waitid - case TARGET_NR_waitid: - { - siginfo_t info; - info.si_pid =3D 0; - ret =3D get_errno(safe_waitid(arg1, arg2, &info, arg4, NULL)); - if (!is_error(ret) && arg3 && info.si_pid !=3D 0) { - if (!(p =3D lock_user(VERIFY_WRITE, arg3, sizeof(target_si= ginfo_t), 0))) - return -TARGET_EFAULT; - host_to_target_siginfo(p, &info); - unlock_user(p, arg3, sizeof(target_siginfo_t)); - } - } - return ret; -#endif #ifdef TARGET_NR_creat /* not on alpha */ case TARGET_NR_creat: if (!(p =3D lock_user_string(arg1))) @@ -6969,33 +6929,6 @@ static abi_long do_syscall1(void *cpu_env, int num, = abi_long arg1, return do_syscall(cpu_env, arg1 & 0xffff, arg2, arg3, arg4, arg5, arg6, arg7, arg8, 0); #endif - case TARGET_NR_wait4: - { - int status; - abi_long status_ptr =3D arg2; - struct rusage rusage, *rusage_ptr; - abi_ulong target_rusage =3D arg4; - abi_long rusage_err; - if (target_rusage) - rusage_ptr =3D &rusage; - else - rusage_ptr =3D NULL; - ret =3D get_errno(safe_wait4(arg1, &status, arg3, rusage_ptr)); - if (!is_error(ret)) { - if (status_ptr && ret) { - status =3D host_to_target_waitstatus(status); - if (put_user_s32(status, status_ptr)) - return -TARGET_EFAULT; - } - if (target_rusage) { - rusage_err =3D host_to_target_rusage(target_rusage, &r= usage); - if (rusage_err) { - ret =3D rusage_err; - } - } - } - } - return ret; #ifdef TARGET_NR_swapoff case TARGET_NR_swapoff: if (!(p =3D lock_user_string(arg1))) diff --git a/linux-user/strace.list b/linux-user/strace.list index 0d978ea580..afa1521e2d 100644 --- a/linux-user/strace.list +++ b/linux-user/strace.list @@ -1494,15 +1494,6 @@ #ifdef TARGET_NR_vserver { TARGET_NR_vserver, "vserver" , NULL, NULL, NULL }, #endif -#ifdef TARGET_NR_wait4 -{ TARGET_NR_wait4, "wait4" , NULL, NULL, NULL }, -#endif -#ifdef TARGET_NR_waitid -{ TARGET_NR_waitid, "waitid" , "%s(%#x,%d,%p,%#x)", NULL, NULL }, -#endif -#ifdef TARGET_NR_waitpid -{ TARGET_NR_waitpid, "waitpid" , "%s(%d,%p,%#x)", NULL, NULL }, -#endif #ifdef TARGET_NR_utimensat { TARGET_NR_utimensat, "utimensat", NULL, print_utimensat, NULL }, #endif --=20 2.17.2