| /* Simulator system call support. |
| |
| Copyright 2002-2018 Free Software Foundation, Inc. |
| |
| This file is part of simulators. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "config.h" |
| |
| #include <errno.h> |
| |
| #include "sim-main.h" |
| #include "sim-syscall.h" |
| #include "targ-vals.h" |
| |
| /* Read/write functions for system call interface. */ |
| |
| int |
| sim_syscall_read_mem (host_callback *cb ATTRIBUTE_UNUSED, struct cb_syscall *sc, |
| unsigned long taddr, char *buf, int bytes) |
| { |
| SIM_DESC sd = (SIM_DESC) sc->p1; |
| SIM_CPU *cpu = (SIM_CPU *) sc->p2; |
| |
| TRACE_MEMORY (cpu, "READ (syscall) %i bytes @ 0x%08lx", bytes, taddr); |
| |
| return sim_core_read_buffer (sd, cpu, read_map, buf, taddr, bytes); |
| } |
| |
| int |
| sim_syscall_write_mem (host_callback *cb ATTRIBUTE_UNUSED, struct cb_syscall *sc, |
| unsigned long taddr, const char *buf, int bytes) |
| { |
| SIM_DESC sd = (SIM_DESC) sc->p1; |
| SIM_CPU *cpu = (SIM_CPU *) sc->p2; |
| |
| TRACE_MEMORY (cpu, "WRITE (syscall) %i bytes @ 0x%08lx", bytes, taddr); |
| |
| return sim_core_write_buffer (sd, cpu, write_map, buf, taddr, bytes); |
| } |
| |
| /* Main syscall callback for simulators. */ |
| |
| void |
| sim_syscall_multi (SIM_CPU *cpu, int func, long arg1, long arg2, long arg3, |
| long arg4, long *result, long *result2, int *errcode) |
| { |
| SIM_DESC sd = CPU_STATE (cpu); |
| host_callback *cb = STATE_CALLBACK (sd); |
| CB_SYSCALL sc; |
| const char unknown_syscall[] = "<UNKNOWN SYSCALL>"; |
| const char *syscall; |
| |
| CB_SYSCALL_INIT (&sc); |
| |
| sc.func = func; |
| sc.arg1 = arg1; |
| sc.arg2 = arg2; |
| sc.arg3 = arg3; |
| sc.arg4 = arg4; |
| |
| sc.p1 = (PTR) sd; |
| sc.p2 = (PTR) cpu; |
| sc.read_mem = sim_syscall_read_mem; |
| sc.write_mem = sim_syscall_write_mem; |
| |
| if (cb_syscall (cb, &sc) != CB_RC_OK) |
| { |
| /* The cb_syscall func never returns an error, so this is more of a |
| sanity check. */ |
| sim_engine_abort (sd, cpu, sim_pc_get (cpu), "cb_syscall failed"); |
| } |
| |
| syscall = cb_target_str_syscall (cb, func); |
| if (!syscall) |
| syscall = unknown_syscall; |
| |
| if (sc.result == -1) |
| TRACE_SYSCALL (cpu, "%s[%i](%#lx, %#lx, %#lx) = %li (error = %s[%i])", |
| syscall, func, arg1, arg2, arg3, sc.result, |
| cb_target_str_errno (cb, sc.errcode), sc.errcode); |
| else |
| 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); |
| else if (sc.result == -1) |
| { |
| cb->last_errno = errno; |
| sc.errcode = cb->get_errno (cb); |
| } |
| |
| *result = sc.result; |
| *result2 = sc.result2; |
| *errcode = sc.errcode; |
| } |
| |
| long |
| sim_syscall (SIM_CPU *cpu, int func, long arg1, long arg2, long arg3, long arg4) |
| { |
| long result, result2; |
| int errcode; |
| |
| sim_syscall_multi (cpu, func, arg1, arg2, arg3, arg4, &result, &result2, |
| &errcode); |
| if (result == -1) |
| return -errcode; |
| else |
| return result; |
| } |