1 /* Simulator system call support.
3 Copyright 2002-2016 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/>. */
25 #include "sim-syscall.h"
26 #include "targ-vals.h"
28 /* Read/write functions for system call interface. */
31 sim_syscall_read_mem (host_callback
*cb ATTRIBUTE_UNUSED
, struct cb_syscall
*sc
,
32 unsigned long taddr
, char *buf
, int bytes
)
34 SIM_DESC sd
= (SIM_DESC
) sc
->p1
;
35 SIM_CPU
*cpu
= (SIM_CPU
*) sc
->p2
;
37 TRACE_MEMORY (cpu
, "READ (syscall) %i bytes @ 0x%08lx", bytes
, taddr
);
39 return sim_core_read_buffer (sd
, cpu
, read_map
, buf
, taddr
, bytes
);
43 sim_syscall_write_mem (host_callback
*cb ATTRIBUTE_UNUSED
, struct cb_syscall
*sc
,
44 unsigned long taddr
, const char *buf
, int bytes
)
46 SIM_DESC sd
= (SIM_DESC
) sc
->p1
;
47 SIM_CPU
*cpu
= (SIM_CPU
*) sc
->p2
;
49 TRACE_MEMORY (cpu
, "WRITE (syscall) %i bytes @ 0x%08lx", bytes
, taddr
);
51 return sim_core_write_buffer (sd
, cpu
, write_map
, buf
, taddr
, bytes
);
54 /* Main syscall callback for simulators. */
57 sim_syscall_multi (SIM_CPU
*cpu
, int func
, long arg1
, long arg2
, long arg3
,
58 long arg4
, long *result
, long *result2
, int *errcode
)
60 SIM_DESC sd
= CPU_STATE (cpu
);
61 host_callback
*cb
= STATE_CALLBACK (sd
);
63 const char unknown_syscall
[] = "<UNKNOWN SYSCALL>";
66 CB_SYSCALL_INIT (&sc
);
76 sc
.read_mem
= sim_syscall_read_mem
;
77 sc
.write_mem
= sim_syscall_write_mem
;
79 if (cb_syscall (cb
, &sc
) != CB_RC_OK
)
81 /* The cb_syscall func never returns an error, so this is more of a
83 sim_engine_abort (sd
, cpu
, sim_pc_get (cpu
), "cb_syscall failed");
86 syscall
= cb_target_str_syscall (cb
, func
);
88 syscall
= unknown_syscall
;
91 TRACE_SYSCALL (cpu
, "%s[%i](%#lx, %#lx, %#lx) = %li (error = %s[%i])",
92 syscall
, func
, arg1
, arg2
, arg3
, sc
.result
,
93 cb_target_str_errno (cb
, sc
.errcode
), sc
.errcode
);
95 TRACE_SYSCALL (cpu
, "%s[%i](%#lx, %#lx, %#lx) = %li",
96 syscall
, func
, arg1
, arg2
, arg3
, sc
.result
);
98 if (cb_target_to_host_syscall (cb
, func
) == CB_SYS_exit
)
99 sim_engine_halt (sd
, cpu
, NULL
, sim_pc_get (cpu
), sim_exited
, arg1
);
100 else if (sc
.result
== -1)
102 cb
->last_errno
= errno
;
103 sc
.errcode
= cb
->get_errno (cb
);
107 *result2
= sc
.result2
;
108 *errcode
= sc
.errcode
;
112 sim_syscall (SIM_CPU
*cpu
, int func
, long arg1
, long arg2
, long arg3
, long arg4
)
114 long result
, result2
;
117 sim_syscall_multi (cpu
, func
, arg1
, arg2
, arg3
, arg4
, &result
, &result2
,