/* * 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 . */ #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]; } }