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Implement normal and abnormal process termination.

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CloudABI does not provide an explicit kill() system call, for the reason
that there is no access to the global process namespace. Instead, it
offers a raise() system call that can at least be used to terminate the
process abnormally.

CloudABI does not support installing signal handlers. CloudABI's raise()
system call should behave as if the default policy is set up. Call into
kern_sigaction(SIG_DFL) before calling sys_kill() to force this.

Obtained from:	https://github.com/NuxiNL/freebsd
This commit is contained in:
Ed Schouten 2015-07-11 19:41:31 +00:00
parent 9dd1a593d2
commit 4f1905177a
1 changed files with 51 additions and 4 deletions
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55
sys/compat/cloudabi/cloudabi_proc.c
View File

@ -26,6 +26,11 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/syscallsubr.h>
#include <sys/sysproto.h>
#include <compat/cloudabi/cloudabi_proto.h>
int
@ -42,8 +47,8 @@ cloudabi_sys_proc_exit(struct thread *td,
struct cloudabi_sys_proc_exit_args *uap)
{
/* Not implemented. */
return (ENOSYS);
exit1(td, W_EXITCODE(uap->rval, 0));
/* NOTREACHED */
}
int
@ -59,7 +64,49 @@ int
cloudabi_sys_proc_raise(struct thread *td,
struct cloudabi_sys_proc_raise_args *uap)
{
static const int signals[] = {
[CLOUDABI_SIGABRT] = SIGABRT,
[CLOUDABI_SIGALRM] = SIGALRM,
[CLOUDABI_SIGBUS] = SIGBUS,
[CLOUDABI_SIGCHLD] = SIGCHLD,
[CLOUDABI_SIGCONT] = SIGCONT,
[CLOUDABI_SIGFPE] = SIGFPE,
[CLOUDABI_SIGHUP] = SIGHUP,
[CLOUDABI_SIGILL] = SIGILL,
[CLOUDABI_SIGINT] = SIGINT,
[CLOUDABI_SIGKILL] = SIGKILL,
[CLOUDABI_SIGPIPE] = SIGPIPE,
[CLOUDABI_SIGQUIT] = SIGQUIT,
[CLOUDABI_SIGSEGV] = SIGSEGV,
[CLOUDABI_SIGSTOP] = SIGSTOP,
[CLOUDABI_SIGSYS] = SIGSYS,
[CLOUDABI_SIGTERM] = SIGTERM,
[CLOUDABI_SIGTRAP] = SIGTRAP,
[CLOUDABI_SIGTSTP] = SIGTSTP,
[CLOUDABI_SIGTTIN] = SIGTTIN,
[CLOUDABI_SIGTTOU] = SIGTTOU,
[CLOUDABI_SIGURG] = SIGURG,
[CLOUDABI_SIGUSR1] = SIGUSR1,
[CLOUDABI_SIGUSR2] = SIGUSR2,
[CLOUDABI_SIGVTALRM] = SIGVTALRM,
[CLOUDABI_SIGXCPU] = SIGXCPU,
[CLOUDABI_SIGXFSZ] = SIGXFSZ,
};
static const struct sigaction sigdfl = {
.sa_handler = SIG_DFL,
};
struct kill_args kill_args = {
.pid = td->td_proc->p_pid,
};
/* Not implemented. */
return (ENOSYS);
if (uap->sig >= nitems(signals) ||
(uap->sig != 0 && signals[uap->sig] == 0)) {
/* Invalid signal. */
return (EINVAL);
}
kill_args.signum = signals[uap->sig];
/* Restore to default signal action and send signal. */
kern_sigaction(td, kill_args.signum, &sigdfl, NULL, 0);
return (sys_kill(td, &kill_args));
}