mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
f9bfc01578
This is used in a few places where it's not needed. Drop the include to avoid the build-time generated header file as we move to drop it.
132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/* Simulator system call support.
|
||
|
||
Copyright 2002-2021 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/>. */
|
||
|
||
/* This must come before any other includes. */
|
||
#include "defs.h"
|
||
|
||
#include <errno.h>
|
||
|
||
#include "sim-main.h"
|
||
#include "sim-syscall.h"
|
||
#include "sim/callback.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 = sd;
|
||
sc.p2 = 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);
|
||
|
||
/* Handle syscalls that affect engine behavior. */
|
||
switch (cb_target_to_host_syscall (cb, func))
|
||
{
|
||
case CB_SYS_exit:
|
||
sim_engine_halt (sd, cpu, NULL, sim_pc_get (cpu), sim_exited, arg1);
|
||
break;
|
||
|
||
case CB_SYS_kill:
|
||
/* TODO: Need to translate target signal to sim signal, but the sim
|
||
doesn't yet have such a mapping layer. */
|
||
if (arg1 == (*cb->getpid) (cb))
|
||
sim_engine_halt (sd, cpu, NULL, sim_pc_get (cpu), sim_signalled, arg2);
|
||
break;
|
||
}
|
||
|
||
*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;
|
||
}
|