in linux-user/ppc/cpu_loop.c [76:474]
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;
}
}
}