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6df01ab8ab
The defs.h header will take care of including the various config.h headers. For now, it's just config.h, but we'll add more when we integrate gnulib in. This header should be used instead of config.h, and should be the first include in every .c file. We won't rely on the old behavior where we expected files to include the port's sim-main.h which then includes the common sim-basics.h which then includes config.h. We have a ton of code that includes things before sim-main.h, and it sometimes needs to be that way. Creating a dedicated header avoids the ordering mess and implicit inclusion that shows up otherwise.
120 lines
3.4 KiB
C
120 lines
3.4 KiB
C
/* Simulator system call support.
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Copyright 2002-2021 Free Software Foundation, Inc.
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This file is part of simulators.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* This must come before any other includes. */
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#include "defs.h"
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#include <errno.h>
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#include "sim-main.h"
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#include "sim-syscall.h"
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#include "targ-vals.h"
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/* Read/write functions for system call interface. */
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int
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sim_syscall_read_mem (host_callback *cb ATTRIBUTE_UNUSED, struct cb_syscall *sc,
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unsigned long taddr, char *buf, int bytes)
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{
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SIM_DESC sd = (SIM_DESC) sc->p1;
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SIM_CPU *cpu = (SIM_CPU *) sc->p2;
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TRACE_MEMORY (cpu, "READ (syscall) %i bytes @ 0x%08lx", bytes, taddr);
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return sim_core_read_buffer (sd, cpu, read_map, buf, taddr, bytes);
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}
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int
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sim_syscall_write_mem (host_callback *cb ATTRIBUTE_UNUSED, struct cb_syscall *sc,
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unsigned long taddr, const char *buf, int bytes)
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{
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SIM_DESC sd = (SIM_DESC) sc->p1;
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SIM_CPU *cpu = (SIM_CPU *) sc->p2;
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TRACE_MEMORY (cpu, "WRITE (syscall) %i bytes @ 0x%08lx", bytes, taddr);
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return sim_core_write_buffer (sd, cpu, write_map, buf, taddr, bytes);
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}
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/* Main syscall callback for simulators. */
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void
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sim_syscall_multi (SIM_CPU *cpu, int func, long arg1, long arg2, long arg3,
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long arg4, long *result, long *result2, int *errcode)
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{
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SIM_DESC sd = CPU_STATE (cpu);
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host_callback *cb = STATE_CALLBACK (sd);
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CB_SYSCALL sc;
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const char unknown_syscall[] = "<UNKNOWN SYSCALL>";
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const char *syscall;
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CB_SYSCALL_INIT (&sc);
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sc.func = func;
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sc.arg1 = arg1;
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sc.arg2 = arg2;
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sc.arg3 = arg3;
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sc.arg4 = arg4;
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sc.p1 = sd;
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sc.p2 = cpu;
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sc.read_mem = sim_syscall_read_mem;
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sc.write_mem = sim_syscall_write_mem;
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if (cb_syscall (cb, &sc) != CB_RC_OK)
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{
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/* The cb_syscall func never returns an error, so this is more of a
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sanity check. */
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sim_engine_abort (sd, cpu, sim_pc_get (cpu), "cb_syscall failed");
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}
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syscall = cb_target_str_syscall (cb, func);
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if (!syscall)
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syscall = unknown_syscall;
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if (sc.result == -1)
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TRACE_SYSCALL (cpu, "%s[%i](%#lx, %#lx, %#lx) = %li (error = %s[%i])",
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syscall, func, arg1, arg2, arg3, sc.result,
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cb_target_str_errno (cb, sc.errcode), sc.errcode);
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else
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TRACE_SYSCALL (cpu, "%s[%i](%#lx, %#lx, %#lx) = %li",
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syscall, func, arg1, arg2, arg3, sc.result);
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if (cb_target_to_host_syscall (cb, func) == CB_SYS_exit)
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sim_engine_halt (sd, cpu, NULL, sim_pc_get (cpu), sim_exited, arg1);
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*result = sc.result;
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*result2 = sc.result2;
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*errcode = sc.errcode;
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}
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long
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sim_syscall (SIM_CPU *cpu, int func, long arg1, long arg2, long arg3, long arg4)
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{
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long result, result2;
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int errcode;
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sim_syscall_multi (cpu, func, arg1, arg2, arg3, arg4, &result, &result2,
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&errcode);
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if (result == -1)
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return -errcode;
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else
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return result;
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}
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