163 lines
5.1 KiB
C
163 lines
5.1 KiB
C
/*
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* qemu user cpu loop
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qemu/help-texts.h"
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#include "qemu.h"
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#include "user-internals.h"
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#include "signal-common.h"
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#include "user-mmap.h"
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#include "cpu_loop-common.h"
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#include "target_elf.h"
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void cpu_loop(CPUE2KState *env)
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{
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CPUState *cs = env_cpu(env);
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int trapnr;
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target_siginfo_t info;
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while (1) {
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cpu_exec_start(cs);
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trapnr = cpu_exec(cs);
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cpu_exec_end(cs);
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process_queued_cpu_work(cs);
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switch (trapnr) {
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case E2K_EXCP_SYSCALL: {
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abi_ullong args[E2K_SYSCALL_MAX_ARGS] = { 0 };
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int psize = MIN(E2K_SYSCALL_MAX_ARGS, env->wd.size);
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abi_ulong ret;
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// TODO: check what happens if env->wd.size is zero
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memcpy(args, env->regs, psize * sizeof(args[0]));
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ret = do_syscall(env, args[0], args[1], args[2], args[3],
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args[4], args[5], args[6], args[7], args[8]);
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if (ret == -QEMU_ERESTARTSYS) {
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/* do not set sysret address and syscall will be restarted */
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} else if (ret != -QEMU_ESIGRETURN && env->wd.psize > 0) {
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memset(env->tags, E2K_TAG_NON_NUMBER64,
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psize * sizeof(env->tags[0]));
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env->regs[0] = ret;
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env->tags[0] = E2K_TAG_NUMBER64;
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env->ip = E2K_SYSRET_ADDR;
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}
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break;
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}
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case E2K_EXCP_ILLOPC:
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case E2K_EXCP_ILLOPN:
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info.si_signo = TARGET_SIGILL;
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info.si_errno = 0;
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info.si_code = trapnr == E2K_EXCP_ILLOPC ?
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TARGET_ILL_ILLOPC : TARGET_ILL_ILLOPN;
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info._sifields._sigfault._addr = env->ip;
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queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
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break;
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case E2K_EXCP_MAPERR:
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info.si_signo = TARGET_SIGSEGV;
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info.si_errno = 0;
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info.si_code = TARGET_SEGV_MAPERR;
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info._sifields._sigfault._addr = env->ip;
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queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
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break;
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case E2K_EXCP_DIV:
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info.si_signo = TARGET_SIGFPE;
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info.si_errno = 0;
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info.si_code = 0;
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info._sifields._sigfault._addr = env->ip;
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queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
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break;
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/* QEMU common interrupts */
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case EXCP_INTERRUPT:
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/* just indicate that signals should be handled asap */
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break;
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case EXCP_DEBUG:
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{
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info.si_signo = TARGET_SIGTRAP;
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info.si_errno = 0;
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info.si_code = TARGET_TRAP_BRKPT;
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queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
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break;
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}
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case EXCP_ATOMIC:
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cpu_exec_step_atomic(cs);
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break;
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case EXCP_HLT:
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case EXCP_HALTED:
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case EXCP_YIELD:
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fprintf(stderr, "Unhandled QEMU trap: 0x%x\n", trapnr);
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break;
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default:
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fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr);
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cpu_dump_state(cs, stderr, 0);
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exit(EXIT_FAILURE);
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}
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process_pending_signals (env);
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}
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}
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void target_cpu_copy_regs(CPUE2KState *env, struct target_pt_regs *regs)
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{
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CPUState *cpu = env_cpu(env);
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TaskState *ts = cpu->opaque;
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struct image_info *info = ts->info;
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uint32_t eflags = info->elf_flags;
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env->ip = regs->ip;
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env->pcsp = regs->pcsp;
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env->psp = regs->psp;
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env->usd.lo = regs->usd_lo;
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env->usd.hi = regs->usd_hi;
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env->sbr = regs->sbr;
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env->elf_flags = info->elf_flags;
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// TODO: set a chain info to return to kernel
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if (eflags & E2K_ELF_PM) {
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fprintf(stderr, "Protected mode is unsupported\n");
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exit(EXIT_FAILURE);
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}
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if (eflags & E2K_ELF_X86APP) {
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fprintf(stderr, "x86 recompiler is unsupported\n");
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exit(EXIT_FAILURE);
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}
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}
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const char *cpu_get_model(uint32_t eflags)
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{
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const char *name = "any";
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uint32_t machine = E2K_ELF_MACH(eflags);
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/* TODO: can't check for EM_E2K_OLD flags because e_machine isn't saved anywhere... */
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switch(machine) {
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case E2K_MACH_EV2: name = "e2c+"; break;
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case E2K_MACH_EV3: name = "e2s"; break;
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case E2K_MACH_1CPLUS:
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case E2K_MACH_8C:
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case E2K_MACH_EV4: name = "e8c"; break;
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case E2K_MACH_EV5: name = "e8c2"; break;
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case E2K_MACH_EV6: name = "e16c"; break;
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}
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return name;
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}
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