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sim: syscall: handle killing the sim itself

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If code tries to send a signal to itself, the callback layer ignores
it and forces the caller to handle it.  This allows the sim to turn
that into an engine halt rather than actually killing the sim.
This commit is contained in:
Mike Frysinger
2021-06-20 23:50:35 -04:00
parent e91488f739
commit 2f631626f1
2 changed files with 18 additions and 2 deletions
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4
sim/common/ChangeLog
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@@ -1,3 +1,7 @@
2021-06-23 Mike Frysinger <vapier@gentoo.org>
* sim-syscall.c (sim_syscall_multi): Handle CB_SYS_kill.
2021-06-23 Mike Frysinger <vapier@gentoo.org>
* callback.c (os_kill): New function.

16
sim/common/sim-syscall.c
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@@ -97,8 +97,20 @@ sim_syscall_multi (SIM_CPU *cpu, int func, long arg1, long arg2, long arg3,
TRACE_SYSCALL (cpu, "%s[%i](%#lx, %#lx, %#lx) = %li",
syscall, func, arg1, arg2, arg3, sc.result);
if (cb_target_to_host_syscall (cb, func) == CB_SYS_exit)
sim_engine_halt (sd, cpu, NULL, sim_pc_get (cpu), sim_exited, arg1);
/* Handle syscalls that affect engine behavior. */
switch (cb_target_to_host_syscall (cb, func))
{
case CB_SYS_exit:
sim_engine_halt (sd, cpu, NULL, sim_pc_get (cpu), sim_exited, arg1);
break;
case CB_SYS_kill:
/* TODO: Need to translate target signal to sim signal, but the sim
doesn't yet have such a mapping layer. */
if (arg1 == (*cb->getpid) (cb))
sim_engine_halt (sd, cpu, NULL, sim_pc_get (cpu), sim_signalled, arg2);
break;
}
*result = sc.result;
*result2 = sc.result2;