From 2f631626f1d8a354d3c5f9d2fce15b47d05d1455 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Sun, 20 Jun 2021 23:50:35 -0400 Subject: sim: syscall: handle killing the sim itself 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. --- sim/common/ChangeLog | 4 ++++ sim/common/sim-syscall.c | 16 ++++++++++++++-- 2 files changed, 18 insertions(+), 2 deletions(-) (limited to 'sim') diff --git a/sim/common/ChangeLog b/sim/common/ChangeLog index c32e747..18d37bd 100644 --- a/sim/common/ChangeLog +++ b/sim/common/ChangeLog @@ -1,5 +1,9 @@ 2021-06-23 Mike Frysinger + * sim-syscall.c (sim_syscall_multi): Handle CB_SYS_kill. + +2021-06-23 Mike Frysinger + * callback.c (os_kill): New function. (default_callback): Add os_kill. * syscall.c (cb_syscall): Handle CB_SYS_kill. diff --git a/sim/common/sim-syscall.c b/sim/common/sim-syscall.c index be3ff8f..f24d761 100644 --- a/sim/common/sim-syscall.c +++ b/sim/common/sim-syscall.c @@ -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; -- cgit v1.1