diff options
Diffstat (limited to 'linux-user/nios2/cpu_loop.c')
| -rw-r--r-- | linux-user/nios2/cpu_loop.c | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/linux-user/nios2/cpu_loop.c b/linux-user/nios2/cpu_loop.c deleted file mode 100644 index 7fe08c8750..0000000000 --- a/linux-user/nios2/cpu_loop.c +++ /dev/null @@ -1,157 +0,0 @@ -/* - * 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.h" -#include "user-internals.h" -#include "cpu_loop-common.h" -#include "signal-common.h" - -void cpu_loop(CPUNios2State *env) -{ - CPUState *cs = env_cpu(env); - int trapnr, ret; - - for (;;) { - cpu_exec_start(cs); - trapnr = cpu_exec(cs); - cpu_exec_end(cs); - process_queued_cpu_work(cs); - - switch (trapnr) { - case EXCP_INTERRUPT: - /* just indicate that signals should be handled asap */ - break; - - case EXCP_DIV: - /* Match kernel's handle_diverror_c(). */ - env->pc -= 4; - force_sig_fault(TARGET_SIGFPE, TARGET_FPE_INTDIV, env->pc); - break; - - case EXCP_UNALIGN: - case EXCP_UNALIGND: - force_sig_fault(TARGET_SIGBUS, TARGET_BUS_ADRALN, - env->ctrl[CR_BADADDR]); - break; - - case EXCP_ILLEGAL: - case EXCP_UNIMPL: - /* Match kernel's handle_illegal_c(). */ - env->pc -= 4; - force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLOPC, env->pc); - break; - case EXCP_SUPERI: - /* Match kernel's handle_supervisor_instr(). */ - env->pc -= 4; - force_sig_fault(TARGET_SIGILL, TARGET_ILL_PRVOPC, env->pc); - break; - - case EXCP_TRAP: - switch (env->error_code) { - case 0: - qemu_log_mask(CPU_LOG_INT, "\nSyscall\n"); - - ret = do_syscall(env, env->regs[2], - env->regs[4], env->regs[5], env->regs[6], - env->regs[7], env->regs[8], env->regs[9], - 0, 0); - - if (ret == -QEMU_ESIGRETURN) { - /* rt_sigreturn has set all state. */ - break; - } - if (ret == -QEMU_ERESTARTSYS) { - env->pc -= 4; - break; - } - /* - * See the code after translate_rc_and_ret: all negative - * values are errors (aided by userspace restricted to 2G), - * errno is returned positive in r2, and error indication - * is a boolean in r7. - */ - env->regs[2] = abs(ret); - env->regs[7] = ret < 0; - break; - - case 1: - qemu_log_mask(CPU_LOG_INT, "\nTrap 1\n"); - force_sig_fault(TARGET_SIGUSR1, 0, env->pc); - break; - case 2: - qemu_log_mask(CPU_LOG_INT, "\nTrap 2\n"); - force_sig_fault(TARGET_SIGUSR2, 0, env->pc); - break; - case 31: - qemu_log_mask(CPU_LOG_INT, "\nTrap 31\n"); - /* Match kernel's breakpoint_c(). */ - env->pc -= 4; - force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->pc); - break; - default: - qemu_log_mask(CPU_LOG_INT, "\nTrap %d\n", env->error_code); - force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLTRP, env->pc); - break; - - case 16: /* QEMU specific, for __kuser_cmpxchg */ - { - abi_ptr g = env->regs[4]; - uint32_t *h, n, o; - - if (g & 0x3) { - force_sig_fault(TARGET_SIGBUS, TARGET_BUS_ADRALN, g); - break; - } - ret = page_get_flags(g); - if (!(ret & PAGE_VALID)) { - force_sig_fault(TARGET_SIGSEGV, TARGET_SEGV_MAPERR, g); - break; - } - if (!(ret & PAGE_READ) || !(ret & PAGE_WRITE)) { - force_sig_fault(TARGET_SIGSEGV, TARGET_SEGV_ACCERR, g); - break; - } - h = g2h(cs, g); - o = env->regs[5]; - n = env->regs[6]; - env->regs[2] = qatomic_cmpxchg(h, o, n) - o; - } - break; - } - break; - - case EXCP_DEBUG: - force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->pc); - break; - default: - EXCP_DUMP(env, "\nqemu: unhandled CPU exception %#x - aborting\n", - trapnr); - abort(); - } - - process_pending_signals(env); - } -} - -void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) -{ - env->regs[R_SP] = regs->sp; - env->pc = regs->ea; -} |