1 /* Simulator system call support.
3 Copyright 2002-2021 Free Software Foundation, Inc.
5 This file is part of simulators.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* This must come before any other includes. */
26 #include "sim-syscall.h"
27 #include "sim/callback.h"
28 #include "targ-vals.h"
30 /* Read/write functions for system call interface. */
33 sim_syscall_read_mem (host_callback
*cb ATTRIBUTE_UNUSED
, struct cb_syscall
*sc
,
34 unsigned long taddr
, char *buf
, int bytes
)
36 SIM_DESC sd
= (SIM_DESC
) sc
->p1
;
37 SIM_CPU
*cpu
= (SIM_CPU
*) sc
->p2
;
39 TRACE_MEMORY (cpu
, "READ (syscall) %i bytes @ 0x%08lx", bytes
, taddr
);
41 return sim_core_read_buffer (sd
, cpu
, read_map
, buf
, taddr
, bytes
);
45 sim_syscall_write_mem (host_callback
*cb ATTRIBUTE_UNUSED
, struct cb_syscall
*sc
,
46 unsigned long taddr
, const char *buf
, int bytes
)
48 SIM_DESC sd
= (SIM_DESC
) sc
->p1
;
49 SIM_CPU
*cpu
= (SIM_CPU
*) sc
->p2
;
51 TRACE_MEMORY (cpu
, "WRITE (syscall) %i bytes @ 0x%08lx", bytes
, taddr
);
53 return sim_core_write_buffer (sd
, cpu
, write_map
, buf
, taddr
, bytes
);
56 /* Main syscall callback for simulators. */
59 sim_syscall_multi (SIM_CPU
*cpu
, int func
, long arg1
, long arg2
, long arg3
,
60 long arg4
, long *result
, long *result2
, int *errcode
)
62 SIM_DESC sd
= CPU_STATE (cpu
);
63 host_callback
*cb
= STATE_CALLBACK (sd
);
65 const char unknown_syscall
[] = "<UNKNOWN SYSCALL>";
68 CB_SYSCALL_INIT (&sc
);
78 sc
.read_mem
= sim_syscall_read_mem
;
79 sc
.write_mem
= sim_syscall_write_mem
;
81 if (cb_syscall (cb
, &sc
) != CB_RC_OK
)
83 /* The cb_syscall func never returns an error, so this is more of a
85 sim_engine_abort (sd
, cpu
, sim_pc_get (cpu
), "cb_syscall failed");
88 syscall
= cb_target_str_syscall (cb
, func
);
90 syscall
= unknown_syscall
;
93 TRACE_SYSCALL (cpu
, "%s[%i](%#lx, %#lx, %#lx) = %li (error = %s[%i])",
94 syscall
, func
, arg1
, arg2
, arg3
, sc
.result
,
95 cb_target_str_errno (cb
, sc
.errcode
), sc
.errcode
);
97 TRACE_SYSCALL (cpu
, "%s[%i](%#lx, %#lx, %#lx) = %li",
98 syscall
, func
, arg1
, arg2
, arg3
, sc
.result
);
100 /* Handle syscalls that affect engine behavior. */
101 switch (cb_target_to_host_syscall (cb
, func
))
104 sim_engine_halt (sd
, cpu
, NULL
, sim_pc_get (cpu
), sim_exited
, arg1
);
108 /* TODO: Need to translate target signal to sim signal, but the sim
109 doesn't yet have such a mapping layer. */
110 if (arg1
== (*cb
->getpid
) (cb
))
111 sim_engine_halt (sd
, cpu
, NULL
, sim_pc_get (cpu
), sim_signalled
, arg2
);
116 *result2
= sc
.result2
;
117 *errcode
= sc
.errcode
;
121 sim_syscall (SIM_CPU
*cpu
, int func
, long arg1
, long arg2
, long arg3
, long arg4
)
123 long result
, result2
;
126 sim_syscall_multi (cpu
, func
, arg1
, arg2
, arg3
, arg4
, &result
, &result2
,
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