| 1 | /* Simulator system call support. |
| 2 | |
| 3 | Copyright 2002-2020 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of simulators. |
| 6 | |
| 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. |
| 11 | |
| 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. |
| 16 | |
| 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/>. */ |
| 19 | |
| 20 | #include "config.h" |
| 21 | |
| 22 | #include <errno.h> |
| 23 | |
| 24 | #include "sim-main.h" |
| 25 | #include "sim-syscall.h" |
| 26 | #include "targ-vals.h" |
| 27 | \f |
| 28 | /* Read/write functions for system call interface. */ |
| 29 | |
| 30 | int |
| 31 | sim_syscall_read_mem (host_callback *cb ATTRIBUTE_UNUSED, struct cb_syscall *sc, |
| 32 | unsigned long taddr, char *buf, int bytes) |
| 33 | { |
| 34 | SIM_DESC sd = (SIM_DESC) sc->p1; |
| 35 | SIM_CPU *cpu = (SIM_CPU *) sc->p2; |
| 36 | |
| 37 | TRACE_MEMORY (cpu, "READ (syscall) %i bytes @ 0x%08lx", bytes, taddr); |
| 38 | |
| 39 | return sim_core_read_buffer (sd, cpu, read_map, buf, taddr, bytes); |
| 40 | } |
| 41 | |
| 42 | int |
| 43 | sim_syscall_write_mem (host_callback *cb ATTRIBUTE_UNUSED, struct cb_syscall *sc, |
| 44 | unsigned long taddr, const char *buf, int bytes) |
| 45 | { |
| 46 | SIM_DESC sd = (SIM_DESC) sc->p1; |
| 47 | SIM_CPU *cpu = (SIM_CPU *) sc->p2; |
| 48 | |
| 49 | TRACE_MEMORY (cpu, "WRITE (syscall) %i bytes @ 0x%08lx", bytes, taddr); |
| 50 | |
| 51 | return sim_core_write_buffer (sd, cpu, write_map, buf, taddr, bytes); |
| 52 | } |
| 53 | \f |
| 54 | /* Main syscall callback for simulators. */ |
| 55 | |
| 56 | void |
| 57 | sim_syscall_multi (SIM_CPU *cpu, int func, long arg1, long arg2, long arg3, |
| 58 | long arg4, long *result, long *result2, int *errcode) |
| 59 | { |
| 60 | SIM_DESC sd = CPU_STATE (cpu); |
| 61 | host_callback *cb = STATE_CALLBACK (sd); |
| 62 | CB_SYSCALL sc; |
| 63 | const char unknown_syscall[] = "<UNKNOWN SYSCALL>"; |
| 64 | const char *syscall; |
| 65 | |
| 66 | CB_SYSCALL_INIT (&sc); |
| 67 | |
| 68 | sc.func = func; |
| 69 | sc.arg1 = arg1; |
| 70 | sc.arg2 = arg2; |
| 71 | sc.arg3 = arg3; |
| 72 | sc.arg4 = arg4; |
| 73 | |
| 74 | sc.p1 = (PTR) sd; |
| 75 | sc.p2 = (PTR) cpu; |
| 76 | sc.read_mem = sim_syscall_read_mem; |
| 77 | sc.write_mem = sim_syscall_write_mem; |
| 78 | |
| 79 | if (cb_syscall (cb, &sc) != CB_RC_OK) |
| 80 | { |
| 81 | /* The cb_syscall func never returns an error, so this is more of a |
| 82 | sanity check. */ |
| 83 | sim_engine_abort (sd, cpu, sim_pc_get (cpu), "cb_syscall failed"); |
| 84 | } |
| 85 | |
| 86 | syscall = cb_target_str_syscall (cb, func); |
| 87 | if (!syscall) |
| 88 | syscall = unknown_syscall; |
| 89 | |
| 90 | if (sc.result == -1) |
| 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); |
| 94 | else |
| 95 | TRACE_SYSCALL (cpu, "%s[%i](%#lx, %#lx, %#lx) = %li", |
| 96 | syscall, func, arg1, arg2, arg3, sc.result); |
| 97 | |
| 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 | |
| 101 | *result = sc.result; |
| 102 | *result2 = sc.result2; |
| 103 | *errcode = sc.errcode; |
| 104 | } |
| 105 | |
| 106 | long |
| 107 | sim_syscall (SIM_CPU *cpu, int func, long arg1, long arg2, long arg3, long arg4) |
| 108 | { |
| 109 | long result, result2; |
| 110 | int errcode; |
| 111 | |
| 112 | sim_syscall_multi (cpu, func, arg1, arg2, arg3, arg4, &result, &result2, |
| 113 | &errcode); |
| 114 | if (result == -1) |
| 115 | return -errcode; |
| 116 | else |
| 117 | return result; |
| 118 | } |