e555e709bb
Since we don't build on OpenBSD, only do FreeBSD system calls here. In the future, we'll need to move this to some place like bsd-user/freebsd/arm/mumble.h, but until then just leave this inline. This reflects changes to the upstream. Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Kyle Evans <kevans@FreeBSD.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
214 lines
7.8 KiB
C
214 lines
7.8 KiB
C
/*
|
|
* arm cpu init and loop
|
|
*
|
|
* Copyright (c) 2013 Stacey D. Son
|
|
*
|
|
* 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 2 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/>.
|
|
*/
|
|
|
|
#ifndef _TARGET_ARCH_CPU_H_
|
|
#define _TARGET_ARCH_CPU_H_
|
|
|
|
#include "target_arch.h"
|
|
#include "signal-common.h"
|
|
|
|
#define TARGET_DEFAULT_CPU_MODEL "any"
|
|
|
|
static inline void target_cpu_init(CPUARMState *env,
|
|
struct target_pt_regs *regs)
|
|
{
|
|
int i;
|
|
|
|
cpsr_write(env, regs->uregs[16], CPSR_USER | CPSR_EXEC,
|
|
CPSRWriteByInstr);
|
|
for (i = 0; i < 16; i++) {
|
|
env->regs[i] = regs->uregs[i];
|
|
}
|
|
}
|
|
|
|
static inline void target_cpu_loop(CPUARMState *env)
|
|
{
|
|
int trapnr, si_signo, si_code;
|
|
CPUState *cs = env_cpu(env);
|
|
|
|
for (;;) {
|
|
cpu_exec_start(cs);
|
|
trapnr = cpu_exec(cs);
|
|
cpu_exec_end(cs);
|
|
process_queued_cpu_work(cs);
|
|
switch (trapnr) {
|
|
case EXCP_UDEF:
|
|
case EXCP_NOCP:
|
|
case EXCP_INVSTATE:
|
|
/*
|
|
* See arm/arm/undefined.c undefinedinstruction();
|
|
*
|
|
* A number of details aren't emulated (they likely don't matter):
|
|
* o Misaligned PC generates ILL_ILLADR (these can't come from qemu)
|
|
* o Thumb-2 instructions generate ILLADR
|
|
* o Both modes implement coprocessor instructions, which we don't
|
|
* do here. FreeBSD just implements them for the VFP coprocessor
|
|
* and special kernel breakpoints, trace points, dtrace, etc.
|
|
*/
|
|
force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLOPC, env->regs[15]);
|
|
break;
|
|
case EXCP_SWI:
|
|
{
|
|
int ret;
|
|
abi_ulong params = get_sp_from_cpustate(env);
|
|
int32_t syscall_nr = env->regs[7];
|
|
int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
|
|
|
|
/* See arm/arm/syscall.c cpu_fetch_syscall_args() */
|
|
if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
|
|
syscall_nr = env->regs[0];
|
|
arg1 = env->regs[1];
|
|
arg2 = env->regs[2];
|
|
arg3 = env->regs[3];
|
|
get_user_s32(arg4, params);
|
|
params += sizeof(int32_t);
|
|
get_user_s32(arg5, params);
|
|
params += sizeof(int32_t);
|
|
get_user_s32(arg6, params);
|
|
params += sizeof(int32_t);
|
|
get_user_s32(arg7, params);
|
|
arg8 = 0;
|
|
} else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
|
|
syscall_nr = env->regs[0];
|
|
arg1 = env->regs[2];
|
|
arg2 = env->regs[3];
|
|
get_user_s32(arg3, params);
|
|
params += sizeof(int32_t);
|
|
get_user_s32(arg4, params);
|
|
params += sizeof(int32_t);
|
|
get_user_s32(arg5, params);
|
|
params += sizeof(int32_t);
|
|
get_user_s32(arg6, params);
|
|
arg7 = 0;
|
|
arg8 = 0;
|
|
} else {
|
|
arg1 = env->regs[0];
|
|
arg2 = env->regs[1];
|
|
arg3 = env->regs[2];
|
|
arg4 = env->regs[3];
|
|
get_user_s32(arg5, params);
|
|
params += sizeof(int32_t);
|
|
get_user_s32(arg6, params);
|
|
params += sizeof(int32_t);
|
|
get_user_s32(arg7, params);
|
|
params += sizeof(int32_t);
|
|
get_user_s32(arg8, params);
|
|
}
|
|
ret = do_freebsd_syscall(env, syscall_nr, arg1, arg2, arg3,
|
|
arg4, arg5, arg6, arg7, arg8);
|
|
/*
|
|
* Compare to arm/arm/vm_machdep.c
|
|
* cpu_set_syscall_retval()
|
|
*/
|
|
if (-TARGET_EJUSTRETURN == ret) {
|
|
/*
|
|
* Returning from a successful sigreturn syscall.
|
|
* Avoid clobbering register state.
|
|
*/
|
|
break;
|
|
}
|
|
if (-TARGET_ERESTART == ret) {
|
|
env->regs[15] -= env->thumb ? 2 : 4;
|
|
break;
|
|
}
|
|
if ((unsigned int)ret >= (unsigned int)(-515)) {
|
|
ret = -ret;
|
|
cpsr_write(env, CPSR_C, CPSR_C, CPSRWriteByInstr);
|
|
env->regs[0] = ret;
|
|
} else {
|
|
cpsr_write(env, 0, CPSR_C, CPSRWriteByInstr);
|
|
env->regs[0] = ret; /* XXX need to handle lseek()? */
|
|
/* env->regs[1] = 0; */
|
|
}
|
|
}
|
|
break;
|
|
case EXCP_INTERRUPT:
|
|
/* just indicate that signals should be handled asap */
|
|
break;
|
|
case EXCP_PREFETCH_ABORT:
|
|
case EXCP_DATA_ABORT:
|
|
/*
|
|
* See arm/arm/trap-v6.c prefetch_abort_handler() and
|
|
* data_abort_handler()
|
|
*
|
|
* However, FreeBSD maps these to a generic value and then uses that
|
|
* to maybe fault in pages in vm/vm_fault.c:vm_fault_trap(). I
|
|
* believe that the indirection maps the same as Linux, but haven't
|
|
* chased down every single possible indirection.
|
|
*/
|
|
|
|
/* For user-only we don't set TTBCR_EAE, so look at the FSR. */
|
|
switch (env->exception.fsr & 0x1f) {
|
|
case 0x1: /* Alignment */
|
|
si_signo = TARGET_SIGBUS;
|
|
si_code = TARGET_BUS_ADRALN;
|
|
break;
|
|
case 0x3: /* Access flag fault, level 1 */
|
|
case 0x6: /* Access flag fault, level 2 */
|
|
case 0x9: /* Domain fault, level 1 */
|
|
case 0xb: /* Domain fault, level 2 */
|
|
case 0xd: /* Permission fault, level 1 */
|
|
case 0xf: /* Permission fault, level 2 */
|
|
si_signo = TARGET_SIGSEGV;
|
|
si_code = TARGET_SEGV_ACCERR;
|
|
break;
|
|
case 0x5: /* Translation fault, level 1 */
|
|
case 0x7: /* Translation fault, level 2 */
|
|
si_signo = TARGET_SIGSEGV;
|
|
si_code = TARGET_SEGV_MAPERR;
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
force_sig_fault(si_signo, si_code, env->exception.vaddress);
|
|
break;
|
|
case EXCP_DEBUG:
|
|
case EXCP_BKPT:
|
|
force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->regs[15]);
|
|
break;
|
|
case EXCP_YIELD:
|
|
/* nothing to do here for user-mode, just resume guest code */
|
|
break;
|
|
case EXCP_ATOMIC:
|
|
cpu_exec_step_atomic(cs);
|
|
break;
|
|
default:
|
|
fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n",
|
|
trapnr);
|
|
cpu_dump_state(cs, stderr, 0);
|
|
abort();
|
|
} /* switch() */
|
|
process_pending_signals(env);
|
|
} /* for (;;) */
|
|
}
|
|
|
|
static inline void target_cpu_clone_regs(CPUARMState *env, target_ulong newsp)
|
|
{
|
|
if (newsp) {
|
|
env->regs[13] = newsp;
|
|
}
|
|
env->regs[0] = 0;
|
|
}
|
|
|
|
static inline void target_cpu_reset(CPUArchState *env)
|
|
{
|
|
}
|
|
|
|
#endif /* !_TARGET_ARCH_CPU_H */
|