mirror of
https://github.com/qemu/qemu.git
synced 2025-10-31 12:07:31 +00:00
5057ae5636
We will raise SIGBUS directly from cpu_loop_exit_sigbus. Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
494 lines
20 KiB
C
494 lines
20 KiB
C
/*
|
|
* qemu user cpu loop
|
|
*
|
|
* Copyright (c) 2003-2008 Fabrice Bellard
|
|
*
|
|
* 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/>.
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qemu-common.h"
|
|
#include "qemu.h"
|
|
#include "user-internals.h"
|
|
#include "cpu_loop-common.h"
|
|
#include "signal-common.h"
|
|
|
|
static inline uint64_t cpu_ppc_get_tb(CPUPPCState *env)
|
|
{
|
|
return cpu_get_host_ticks();
|
|
}
|
|
|
|
uint64_t cpu_ppc_load_tbl(CPUPPCState *env)
|
|
{
|
|
return cpu_ppc_get_tb(env);
|
|
}
|
|
|
|
uint32_t cpu_ppc_load_tbu(CPUPPCState *env)
|
|
{
|
|
return cpu_ppc_get_tb(env) >> 32;
|
|
}
|
|
|
|
uint64_t cpu_ppc_load_atbl(CPUPPCState *env)
|
|
{
|
|
return cpu_ppc_get_tb(env);
|
|
}
|
|
|
|
uint32_t cpu_ppc_load_atbu(CPUPPCState *env)
|
|
{
|
|
return cpu_ppc_get_tb(env) >> 32;
|
|
}
|
|
|
|
uint64_t cpu_ppc_load_vtb(CPUPPCState *env)
|
|
{
|
|
return cpu_ppc_get_tb(env);
|
|
}
|
|
|
|
uint32_t cpu_ppc601_load_rtcu(CPUPPCState *env)
|
|
__attribute__ (( alias ("cpu_ppc_load_tbu") ));
|
|
|
|
uint32_t cpu_ppc601_load_rtcl(CPUPPCState *env)
|
|
{
|
|
return cpu_ppc_load_tbl(env) & 0x3FFFFF80;
|
|
}
|
|
|
|
/* XXX: to be fixed */
|
|
int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, uint32_t *valp)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, uint32_t val)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
void cpu_loop(CPUPPCState *env)
|
|
{
|
|
CPUState *cs = env_cpu(env);
|
|
target_siginfo_t info;
|
|
int trapnr;
|
|
target_ulong ret;
|
|
|
|
for(;;) {
|
|
bool arch_interrupt;
|
|
|
|
cpu_exec_start(cs);
|
|
trapnr = cpu_exec(cs);
|
|
cpu_exec_end(cs);
|
|
process_queued_cpu_work(cs);
|
|
|
|
arch_interrupt = true;
|
|
switch (trapnr) {
|
|
case POWERPC_EXCP_NONE:
|
|
/* Just go on */
|
|
break;
|
|
case POWERPC_EXCP_CRITICAL: /* Critical input */
|
|
cpu_abort(cs, "Critical interrupt while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_MCHECK: /* Machine check exception */
|
|
cpu_abort(cs, "Machine check exception while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_DSI: /* Data storage exception */
|
|
/* XXX: check this. Seems bugged */
|
|
switch (env->error_code & 0xFF000000) {
|
|
case 0x40000000:
|
|
case 0x42000000:
|
|
info.si_signo = TARGET_SIGSEGV;
|
|
info.si_errno = 0;
|
|
info.si_code = TARGET_SEGV_MAPERR;
|
|
break;
|
|
case 0x04000000:
|
|
info.si_signo = TARGET_SIGILL;
|
|
info.si_errno = 0;
|
|
info.si_code = TARGET_ILL_ILLADR;
|
|
break;
|
|
case 0x08000000:
|
|
info.si_signo = TARGET_SIGSEGV;
|
|
info.si_errno = 0;
|
|
info.si_code = TARGET_SEGV_ACCERR;
|
|
break;
|
|
default:
|
|
/* Let's send a regular segfault... */
|
|
EXCP_DUMP(env, "Invalid segfault errno (%02x)\n",
|
|
env->error_code);
|
|
info.si_signo = TARGET_SIGSEGV;
|
|
info.si_errno = 0;
|
|
info.si_code = TARGET_SEGV_MAPERR;
|
|
break;
|
|
}
|
|
info._sifields._sigfault._addr = env->spr[SPR_DAR];
|
|
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
|
|
break;
|
|
case POWERPC_EXCP_ISI: /* Instruction storage exception */
|
|
/* XXX: check this */
|
|
switch (env->error_code & 0xFF000000) {
|
|
case 0x40000000:
|
|
info.si_signo = TARGET_SIGSEGV;
|
|
info.si_errno = 0;
|
|
info.si_code = TARGET_SEGV_MAPERR;
|
|
break;
|
|
case 0x10000000:
|
|
case 0x08000000:
|
|
info.si_signo = TARGET_SIGSEGV;
|
|
info.si_errno = 0;
|
|
info.si_code = TARGET_SEGV_ACCERR;
|
|
break;
|
|
default:
|
|
/* Let's send a regular segfault... */
|
|
EXCP_DUMP(env, "Invalid segfault errno (%02x)\n",
|
|
env->error_code);
|
|
info.si_signo = TARGET_SIGSEGV;
|
|
info.si_errno = 0;
|
|
info.si_code = TARGET_SEGV_MAPERR;
|
|
break;
|
|
}
|
|
info._sifields._sigfault._addr = env->nip - 4;
|
|
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
|
|
break;
|
|
case POWERPC_EXCP_EXTERNAL: /* External input */
|
|
cpu_abort(cs, "External interrupt while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_PROGRAM: /* Program exception */
|
|
case POWERPC_EXCP_HV_EMU: /* HV emulation */
|
|
/* XXX: check this */
|
|
switch (env->error_code & ~0xF) {
|
|
case POWERPC_EXCP_FP:
|
|
info.si_signo = TARGET_SIGFPE;
|
|
info.si_errno = 0;
|
|
switch (env->error_code & 0xF) {
|
|
case POWERPC_EXCP_FP_OX:
|
|
info.si_code = TARGET_FPE_FLTOVF;
|
|
break;
|
|
case POWERPC_EXCP_FP_UX:
|
|
info.si_code = TARGET_FPE_FLTUND;
|
|
break;
|
|
case POWERPC_EXCP_FP_ZX:
|
|
case POWERPC_EXCP_FP_VXZDZ:
|
|
info.si_code = TARGET_FPE_FLTDIV;
|
|
break;
|
|
case POWERPC_EXCP_FP_XX:
|
|
info.si_code = TARGET_FPE_FLTRES;
|
|
break;
|
|
case POWERPC_EXCP_FP_VXSOFT:
|
|
info.si_code = TARGET_FPE_FLTINV;
|
|
break;
|
|
case POWERPC_EXCP_FP_VXSNAN:
|
|
case POWERPC_EXCP_FP_VXISI:
|
|
case POWERPC_EXCP_FP_VXIDI:
|
|
case POWERPC_EXCP_FP_VXIMZ:
|
|
case POWERPC_EXCP_FP_VXVC:
|
|
case POWERPC_EXCP_FP_VXSQRT:
|
|
case POWERPC_EXCP_FP_VXCVI:
|
|
info.si_code = TARGET_FPE_FLTSUB;
|
|
break;
|
|
default:
|
|
EXCP_DUMP(env, "Unknown floating point exception (%02x)\n",
|
|
env->error_code);
|
|
break;
|
|
}
|
|
break;
|
|
case POWERPC_EXCP_INVAL:
|
|
info.si_signo = TARGET_SIGILL;
|
|
info.si_errno = 0;
|
|
switch (env->error_code & 0xF) {
|
|
case POWERPC_EXCP_INVAL_INVAL:
|
|
info.si_code = TARGET_ILL_ILLOPC;
|
|
break;
|
|
case POWERPC_EXCP_INVAL_LSWX:
|
|
info.si_code = TARGET_ILL_ILLOPN;
|
|
break;
|
|
case POWERPC_EXCP_INVAL_SPR:
|
|
info.si_code = TARGET_ILL_PRVREG;
|
|
break;
|
|
case POWERPC_EXCP_INVAL_FP:
|
|
info.si_code = TARGET_ILL_COPROC;
|
|
break;
|
|
default:
|
|
EXCP_DUMP(env, "Unknown invalid operation (%02x)\n",
|
|
env->error_code & 0xF);
|
|
info.si_code = TARGET_ILL_ILLADR;
|
|
break;
|
|
}
|
|
break;
|
|
case POWERPC_EXCP_PRIV:
|
|
info.si_signo = TARGET_SIGILL;
|
|
info.si_errno = 0;
|
|
switch (env->error_code & 0xF) {
|
|
case POWERPC_EXCP_PRIV_OPC:
|
|
info.si_code = TARGET_ILL_PRVOPC;
|
|
break;
|
|
case POWERPC_EXCP_PRIV_REG:
|
|
info.si_code = TARGET_ILL_PRVREG;
|
|
break;
|
|
default:
|
|
EXCP_DUMP(env, "Unknown privilege violation (%02x)\n",
|
|
env->error_code & 0xF);
|
|
info.si_code = TARGET_ILL_PRVOPC;
|
|
break;
|
|
}
|
|
break;
|
|
case POWERPC_EXCP_TRAP:
|
|
cpu_abort(cs, "Tried to call a TRAP\n");
|
|
break;
|
|
default:
|
|
/* Should not happen ! */
|
|
cpu_abort(cs, "Unknown program exception (%02x)\n",
|
|
env->error_code);
|
|
break;
|
|
}
|
|
info._sifields._sigfault._addr = env->nip;
|
|
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
|
|
break;
|
|
case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */
|
|
info.si_signo = TARGET_SIGILL;
|
|
info.si_errno = 0;
|
|
info.si_code = TARGET_ILL_COPROC;
|
|
info._sifields._sigfault._addr = env->nip;
|
|
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
|
|
break;
|
|
case POWERPC_EXCP_SYSCALL: /* System call exception */
|
|
case POWERPC_EXCP_SYSCALL_VECTORED:
|
|
cpu_abort(cs, "Syscall exception while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_APU: /* Auxiliary processor unavailable */
|
|
info.si_signo = TARGET_SIGILL;
|
|
info.si_errno = 0;
|
|
info.si_code = TARGET_ILL_COPROC;
|
|
info._sifields._sigfault._addr = env->nip;
|
|
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
|
|
break;
|
|
case POWERPC_EXCP_DECR: /* Decrementer exception */
|
|
cpu_abort(cs, "Decrementer interrupt while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_FIT: /* Fixed-interval timer interrupt */
|
|
cpu_abort(cs, "Fix interval timer interrupt while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_WDT: /* Watchdog timer interrupt */
|
|
cpu_abort(cs, "Watchdog timer interrupt while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_DTLB: /* Data TLB error */
|
|
cpu_abort(cs, "Data TLB exception while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_ITLB: /* Instruction TLB error */
|
|
cpu_abort(cs, "Instruction TLB exception while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_SPEU: /* SPE/embedded floating-point unavail. */
|
|
info.si_signo = TARGET_SIGILL;
|
|
info.si_errno = 0;
|
|
info.si_code = TARGET_ILL_COPROC;
|
|
info._sifields._sigfault._addr = env->nip;
|
|
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
|
|
break;
|
|
case POWERPC_EXCP_EFPDI: /* Embedded floating-point data IRQ */
|
|
cpu_abort(cs, "Embedded floating-point data IRQ not handled\n");
|
|
break;
|
|
case POWERPC_EXCP_EFPRI: /* Embedded floating-point round IRQ */
|
|
cpu_abort(cs, "Embedded floating-point round IRQ not handled\n");
|
|
break;
|
|
case POWERPC_EXCP_EPERFM: /* Embedded performance monitor IRQ */
|
|
cpu_abort(cs, "Performance monitor exception not handled\n");
|
|
break;
|
|
case POWERPC_EXCP_DOORI: /* Embedded doorbell interrupt */
|
|
cpu_abort(cs, "Doorbell interrupt while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_DOORCI: /* Embedded doorbell critical interrupt */
|
|
cpu_abort(cs, "Doorbell critical interrupt while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_RESET: /* System reset exception */
|
|
cpu_abort(cs, "Reset interrupt while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_DSEG: /* Data segment exception */
|
|
cpu_abort(cs, "Data segment exception while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_ISEG: /* Instruction segment exception */
|
|
cpu_abort(cs, "Instruction segment exception "
|
|
"while in user mode. Aborting\n");
|
|
break;
|
|
/* PowerPC 64 with hypervisor mode support */
|
|
case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */
|
|
cpu_abort(cs, "Hypervisor decrementer interrupt "
|
|
"while in user mode. Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_TRACE: /* Trace exception */
|
|
/* Nothing to do:
|
|
* we use this exception to emulate step-by-step execution mode.
|
|
*/
|
|
break;
|
|
/* PowerPC 64 with hypervisor mode support */
|
|
case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */
|
|
cpu_abort(cs, "Hypervisor data storage exception "
|
|
"while in user mode. Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_HISI: /* Hypervisor instruction storage excp */
|
|
cpu_abort(cs, "Hypervisor instruction storage exception "
|
|
"while in user mode. Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */
|
|
cpu_abort(cs, "Hypervisor data segment exception "
|
|
"while in user mode. Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment excp */
|
|
cpu_abort(cs, "Hypervisor instruction segment exception "
|
|
"while in user mode. Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_VPU: /* Vector unavailable exception */
|
|
info.si_signo = TARGET_SIGILL;
|
|
info.si_errno = 0;
|
|
info.si_code = TARGET_ILL_COPROC;
|
|
info._sifields._sigfault._addr = env->nip;
|
|
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
|
|
break;
|
|
case POWERPC_EXCP_PIT: /* Programmable interval timer IRQ */
|
|
cpu_abort(cs, "Programmable interval timer interrupt "
|
|
"while in user mode. Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_IO: /* IO error exception */
|
|
cpu_abort(cs, "IO error exception while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_RUNM: /* Run mode exception */
|
|
cpu_abort(cs, "Run mode exception while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_EMUL: /* Emulation trap exception */
|
|
cpu_abort(cs, "Emulation trap exception not handled\n");
|
|
break;
|
|
case POWERPC_EXCP_IFTLB: /* Instruction fetch TLB error */
|
|
cpu_abort(cs, "Instruction fetch TLB exception "
|
|
"while in user-mode. Aborting");
|
|
break;
|
|
case POWERPC_EXCP_DLTLB: /* Data load TLB miss */
|
|
cpu_abort(cs, "Data load TLB exception while in user-mode. "
|
|
"Aborting");
|
|
break;
|
|
case POWERPC_EXCP_DSTLB: /* Data store TLB miss */
|
|
cpu_abort(cs, "Data store TLB exception while in user-mode. "
|
|
"Aborting");
|
|
break;
|
|
case POWERPC_EXCP_FPA: /* Floating-point assist exception */
|
|
cpu_abort(cs, "Floating-point assist exception not handled\n");
|
|
break;
|
|
case POWERPC_EXCP_IABR: /* Instruction address breakpoint */
|
|
cpu_abort(cs, "Instruction address breakpoint exception "
|
|
"not handled\n");
|
|
break;
|
|
case POWERPC_EXCP_SMI: /* System management interrupt */
|
|
cpu_abort(cs, "System management interrupt while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_THERM: /* Thermal interrupt */
|
|
cpu_abort(cs, "Thermal interrupt interrupt while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_PERFM: /* Embedded performance monitor IRQ */
|
|
cpu_abort(cs, "Performance monitor exception not handled\n");
|
|
break;
|
|
case POWERPC_EXCP_VPUA: /* Vector assist exception */
|
|
cpu_abort(cs, "Vector assist exception not handled\n");
|
|
break;
|
|
case POWERPC_EXCP_SOFTP: /* Soft patch exception */
|
|
cpu_abort(cs, "Soft patch exception not handled\n");
|
|
break;
|
|
case POWERPC_EXCP_MAINT: /* Maintenance exception */
|
|
cpu_abort(cs, "Maintenance exception while in user mode. "
|
|
"Aborting\n");
|
|
break;
|
|
case POWERPC_EXCP_SYSCALL_USER:
|
|
/* system call in user-mode emulation */
|
|
/* WARNING:
|
|
* PPC ABI uses overflow flag in cr0 to signal an error
|
|
* in syscalls.
|
|
*/
|
|
env->crf[0] &= ~0x1;
|
|
env->nip += 4;
|
|
ret = do_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
|
|
env->gpr[5], env->gpr[6], env->gpr[7],
|
|
env->gpr[8], 0, 0);
|
|
if (ret == -TARGET_ERESTARTSYS) {
|
|
env->nip -= 4;
|
|
break;
|
|
}
|
|
if (ret == (target_ulong)(-TARGET_QEMU_ESIGRETURN)) {
|
|
/* Returning from a successful sigreturn syscall.
|
|
Avoid corrupting register state. */
|
|
break;
|
|
}
|
|
if (ret > (target_ulong)(-515)) {
|
|
env->crf[0] |= 0x1;
|
|
ret = -ret;
|
|
}
|
|
env->gpr[3] = ret;
|
|
break;
|
|
case EXCP_DEBUG:
|
|
info.si_signo = TARGET_SIGTRAP;
|
|
info.si_errno = 0;
|
|
info.si_code = TARGET_TRAP_BRKPT;
|
|
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
|
|
break;
|
|
case EXCP_INTERRUPT:
|
|
/* just indicate that signals should be handled asap */
|
|
break;
|
|
case EXCP_ATOMIC:
|
|
cpu_exec_step_atomic(cs);
|
|
arch_interrupt = false;
|
|
break;
|
|
default:
|
|
cpu_abort(cs, "Unknown exception 0x%x. Aborting\n", trapnr);
|
|
break;
|
|
}
|
|
process_pending_signals(env);
|
|
|
|
/* Most of the traps imply a transition through kernel mode,
|
|
* which implies an REI instruction has been executed. Which
|
|
* means that RX and LOCK_ADDR should be cleared. But there
|
|
* are a few exceptions for traps internal to QEMU.
|
|
*/
|
|
if (arch_interrupt) {
|
|
env->reserve_addr = -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
|
|
{
|
|
int i;
|
|
|
|
#if defined(TARGET_PPC64)
|
|
int flag = (env->insns_flags2 & PPC2_BOOKE206) ? MSR_CM : MSR_SF;
|
|
#if defined(TARGET_ABI32)
|
|
ppc_store_msr(env, env->msr & ~((target_ulong)1 << flag));
|
|
#else
|
|
ppc_store_msr(env, env->msr | (target_ulong)1 << flag);
|
|
#endif
|
|
#endif
|
|
|
|
env->nip = regs->nip;
|
|
for(i = 0; i < 32; i++) {
|
|
env->gpr[i] = regs->gpr[i];
|
|
}
|
|
}
|