1 /* Simulator system call support.
3 Copyright 2002-2018 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);
102 *result2 = sc.result2;
103 *errcode = sc.errcode;
107 sim_syscall (SIM_CPU *cpu, int func, long arg1, long arg2, long arg3, long arg4)
109 long result, result2;
112 sim_syscall_multi (cpu, func, arg1, arg2, arg3, arg4, &result, &result2,