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/* |
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* main_unix.cpp - Emulation core, Unix implementation |
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* |
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* SheepShaver (C) 1997-2005 Christian Bauer and Marc Hellwig |
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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, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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|
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/* |
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* NOTES: |
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* |
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* See main_beos.cpp for a description of the three operating modes. |
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* |
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* In addition to that, we have to handle the fact that the MacOS ABI |
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* is slightly different from the SysV ABI used by Linux: |
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* - Stack frames are different (e.g. LR is stored in 8(r1) under |
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* MacOS, but in 4(r1) under Linux) |
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* - There is a pointer to Thread Local Storage (TLS) under Linux with |
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* recent enough glibc. This is r2 in 32-bit mode and r13 in |
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* 64-bit mode (PowerOpen/AIX ABI) |
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* - r13 is used as a small data pointer under Linux (but appearently |
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* it is not used this way? To be sure, we specify -msdata=none |
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* in the Makefile) |
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* - There are no TVECTs under Linux; function pointers point |
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* directly to the function code |
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* The Execute*() functions have to account for this. Additionally, we |
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* cannot simply call MacOS functions by getting their TVECT and jumping |
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* to it. Such calls are done via the call_macos*() functions in |
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* asm_linux.S that create a MacOS stack frame, load the TOC pointer |
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* and put the arguments into the right registers. |
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* |
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* As on the BeOS, we have to specify an alternate signal stack because |
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* interrupts (and, under Linux, Low Memory accesses) may occur when r1 |
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* is pointing to the Kernel Data or to Low Memory. There is one |
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* problem, however, due to the alternate signal stack being global to |
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* all signal handlers. Consider the following scenario: |
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* - The main thread is executing some native PPC MacOS code in |
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* MODE_NATIVE, running on the MacOS stack (somewhere in the Mac RAM). |
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* - A SIGUSR2 interrupt occurs. The kernel switches to the signal |
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* stack and starts executing the SIGUSR2 signal handler. |
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* - The signal handler sees the MODE_NATIVE and calls ppc_interrupt() |
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* to handle a native interrupt. |
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* - ppc_interrupt() sets r1 to point to the Kernel Data and jumps to |
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* the nanokernel. |
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* - The nanokernel accesses a Low Memory global (most likely one of |
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* the XLMs), a SIGSEGV occurs. |
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* - The kernel sees that r1 does not point to the signal stack and |
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* switches to the signal stack again, thus overwriting the data that |
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* the SIGUSR2 handler put there. |
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* The same problem arises when calling ExecutePPC() inside the MODE_EMUL_OP |
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* interrupt handler. |
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* |
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* The solution is to set the signal stack to a second, "extra" stack |
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* inside the SIGUSR2 handler before entering the Nanokernel or calling |
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* ExecutePPC (or any function that might cause a mode switch). The signal |
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* stack is restored before exiting the SIGUSR2 handler. |
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* |
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* There is apparently another problem when processing signals. In |
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* fullscreen mode, we get quick updates of the mouse position. This |
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* causes an increased number of calls to TriggerInterrupt(). And, |
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* since IRQ_NEST is not fully handled atomically, nested calls to |
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* ppc_interrupt() may cause stack corruption to eventually crash the |
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* emulator. |
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* |
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* FIXME: |
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* The current solution is to allocate another signal stack when |
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* processing ppc_interrupt(). However, it may be better to detect |
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* the INTFLAG_ADB case and handle it specifically with some extra mutex? |
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* |
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* TODO: |
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* check if SIGSEGV handler works for all registers (including FP!) |
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*/ |
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|
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#include <unistd.h> |
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#include <fcntl.h> |
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#include <time.h> |
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#include <errno.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <pthread.h> |
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#include <sys/mman.h> |
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#include <sys/ipc.h> |
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#include <sys/shm.h> |
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#include <signal.h> |
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|
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#include "sysdeps.h" |
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#include "main.h" |
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#include "version.h" |
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#include "prefs.h" |
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#include "prefs_editor.h" |
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#include "cpu_emulation.h" |
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#include "emul_op.h" |
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#include "xlowmem.h" |
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#include "xpram.h" |
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#include "timer.h" |
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#include "adb.h" |
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#include "video.h" |
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#include "sys.h" |
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#include "macos_util.h" |
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#include "rom_patches.h" |
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#include "user_strings.h" |
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#include "vm_alloc.h" |
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#include "sigsegv.h" |
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|
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#define DEBUG 0 |
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#include "debug.h" |
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|
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|
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#ifdef HAVE_DIRENT_H |
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#include <dirent.h> |
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#endif |
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|
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#ifdef USE_SDL |
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#include <SDL.h> |
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#endif |
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|
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#ifndef USE_SDL_VIDEO |
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#include <X11/Xlib.h> |
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#endif |
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|
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#ifdef ENABLE_GTK |
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#include <gtk/gtk.h> |
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#endif |
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|
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#ifdef ENABLE_XF86_DGA |
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#include <X11/Xlib.h> |
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#include <X11/Xutil.h> |
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#include <X11/extensions/xf86dga.h> |
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#endif |
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|
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#ifdef ENABLE_MON |
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#include "mon.h" |
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#endif |
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|
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|
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// Enable emulation of unaligned lmw/stmw? |
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#define EMULATE_UNALIGNED_LOADSTORE_MULTIPLE 1 |
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|
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// Enable Execute68k() safety checks? |
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#define SAFE_EXEC_68K 0 |
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|
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// Interrupts in EMUL_OP mode? |
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#define INTERRUPTS_IN_EMUL_OP_MODE 1 |
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|
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// Interrupts in native mode? |
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#define INTERRUPTS_IN_NATIVE_MODE 1 |
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|
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// Number of alternate stacks for signal handlers? |
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#define SIG_STACK_COUNT 4 |
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|
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|
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// Constants |
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const char ROM_FILE_NAME[] = "ROM"; |
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const char ROM_FILE_NAME2[] = "Mac OS ROM"; |
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|
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#if REAL_ADDRESSING |
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const uintptr RAM_BASE = 0x20000000; // Base address of RAM |
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#else |
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// FIXME: needs to be >= 0x04000000 |
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const uintptr RAM_BASE = 0x10000000; // Base address of RAM |
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#endif |
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const uint32 SIG_STACK_SIZE = 0x10000; // Size of signal stack |
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|
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|
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#if !EMULATED_PPC |
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struct sigregs { |
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uint32 nip; |
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uint32 link; |
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uint32 ctr; |
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uint32 msr; |
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uint32 xer; |
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uint32 ccr; |
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uint32 gpr[32]; |
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}; |
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|
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#if defined(__linux__) |
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#include <sys/ucontext.h> |
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#define MACHINE_REGISTERS(scp) ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext.regs)) |
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|
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struct machine_regs : public pt_regs |
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{ |
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u_long & cr() { return pt_regs::ccr; } |
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uint32 cr() const { return pt_regs::ccr; } |
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uint32 lr() const { return pt_regs::link; } |
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uint32 ctr() const { return pt_regs::ctr; } |
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uint32 xer() const { return pt_regs::xer; } |
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uint32 msr() const { return pt_regs::msr; } |
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uint32 dar() const { return pt_regs::dar; } |
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u_long & pc() { return pt_regs::nip; } |
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uint32 pc() const { return pt_regs::nip; } |
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u_long & gpr(int i) { return pt_regs::gpr[i]; } |
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uint32 gpr(int i) const { return pt_regs::gpr[i]; } |
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}; |
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#endif |
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|
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#if defined(__NetBSD__) |
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#include <sys/ucontext.h> |
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#define MACHINE_REGISTERS(scp) ((machine_regs *)&(((ucontext_t *)scp)->uc_mcontext)) |
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|
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struct machine_regs : public mcontext_t |
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{ |
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long & cr() { return __gregs[_REG_CR]; } |
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uint32 cr() const { return __gregs[_REG_CR]; } |
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uint32 lr() const { return __gregs[_REG_LR]; } |
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uint32 ctr() const { return __gregs[_REG_CTR]; } |
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uint32 xer() const { return __gregs[_REG_XER]; } |
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uint32 msr() const { return __gregs[_REG_MSR]; } |
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uint32 dar() const { return (uint32)(((siginfo_t *)(((unsigned long)this) - offsetof(ucontext_t, uc_mcontext))) - 1)->si_addr; } /* HACK */ |
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long & pc() { return __gregs[_REG_PC]; } |
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uint32 pc() const { return __gregs[_REG_PC]; } |
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long & gpr(int i) { return __gregs[_REG_R0 + i]; } |
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uint32 gpr(int i) const { return __gregs[_REG_R0 + i]; } |
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}; |
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#endif |
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|
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#if defined(__APPLE__) && defined(__MACH__) |
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#include <sys/signal.h> |
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extern "C" int sigaltstack(const struct sigaltstack *ss, struct sigaltstack *oss); |
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|
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#include <sys/ucontext.h> |
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#define MACHINE_REGISTERS(scp) ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext)) |
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|
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struct machine_regs : public mcontext |
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{ |
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uint32 & cr() { return ss.cr; } |
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uint32 cr() const { return ss.cr; } |
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uint32 lr() const { return ss.lr; } |
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uint32 ctr() const { return ss.ctr; } |
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uint32 xer() const { return ss.xer; } |
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uint32 msr() const { return ss.srr1; } |
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uint32 dar() const { return es.dar; } |
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uint32 & pc() { return ss.srr0; } |
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uint32 pc() const { return ss.srr0; } |
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uint32 & gpr(int i) { return (&ss.r0)[i]; } |
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uint32 gpr(int i) const { return (&ss.r0)[i]; } |
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}; |
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#endif |
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|
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static void build_sigregs(sigregs *srp, machine_regs *mrp) |
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{ |
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srp->nip = mrp->pc(); |
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srp->link = mrp->lr(); |
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srp->ctr = mrp->ctr(); |
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srp->msr = mrp->msr(); |
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srp->xer = mrp->xer(); |
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srp->ccr = mrp->cr(); |
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for (int i = 0; i < 32; i++) |
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srp->gpr[i] = mrp->gpr(i); |
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} |
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|
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static struct sigaltstack sig_stacks[SIG_STACK_COUNT]; // Stacks for signal handlers |
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static int sig_stack_id = 0; // Stack slot currently used |
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|
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static inline int sig_stack_acquire(void) |
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{ |
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if (sig_stack_id >= SIG_STACK_COUNT) { |
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printf("FATAL: signal stack overflow\n"); |
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return -1; |
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} |
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return sigaltstack(&sig_stacks[sig_stack_id++], NULL); |
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} |
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|
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static inline int sig_stack_release(void) |
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{ |
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if (sig_stack_id <= 0) { |
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printf("FATAL: signal stack underflow\n"); |
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return -1; |
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} |
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return sigaltstack(&sig_stacks[--sig_stack_id], NULL); |
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} |
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#endif |
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|
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|
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// Global variables (exported) |
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#if !EMULATED_PPC |
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void *TOC; // Pointer to Thread Local Storage (r2) |
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void *R13; // Pointer to .sdata section (r13 under Linux) |
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#endif |
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uint32 RAMBase; // Base address of Mac RAM |
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uint32 RAMSize; // Size of Mac RAM |
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uint32 KernelDataAddr; // Address of Kernel Data |
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uint32 BootGlobsAddr; // Address of BootGlobs structure at top of Mac RAM |
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uint32 DRCacheAddr; // Address of DR Cache |
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uint32 PVR; // Theoretical PVR |
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int64 CPUClockSpeed; // Processor clock speed (Hz) |
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int64 BusClockSpeed; // Bus clock speed (Hz) |
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int64 TimebaseSpeed; // Timebase clock speed (Hz) |
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uint8 *RAMBaseHost; // Base address of Mac RAM (host address space) |
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uint8 *ROMBaseHost; // Base address of Mac ROM (host address space) |
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|
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|
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// Global variables |
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#ifndef USE_SDL_VIDEO |
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char *x_display_name = NULL; // X11 display name |
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Display *x_display = NULL; // X11 display handle |
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#ifdef X11_LOCK_TYPE |
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X11_LOCK_TYPE x_display_lock = X11_LOCK_INIT; // X11 display lock |
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#endif |
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#endif |
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|
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static int zero_fd = 0; // FD of /dev/zero |
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static bool lm_area_mapped = false; // Flag: Low Memory area mmap()ped |
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static int kernel_area = -1; // SHM ID of Kernel Data area |
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static bool rom_area_mapped = false; // Flag: Mac ROM mmap()ped |
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static bool ram_area_mapped = false; // Flag: Mac RAM mmap()ped |
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static bool dr_cache_area_mapped = false; // Flag: Mac DR Cache mmap()ped |
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static bool dr_emulator_area_mapped = false;// Flag: Mac DR Emulator mmap()ped |
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static KernelData *kernel_data; // Pointer to Kernel Data |
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static EmulatorData *emulator_data; |
| 323 |
|
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static uint8 last_xpram[XPRAM_SIZE]; // Buffer for monitoring XPRAM changes |
| 325 |
|
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static bool nvram_thread_active = false; // Flag: NVRAM watchdog installed |
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static volatile bool nvram_thread_cancel; // Flag: Cancel NVRAM thread |
| 328 |
static pthread_t nvram_thread; // NVRAM watchdog |
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static bool tick_thread_active = false; // Flag: MacOS thread installed |
| 330 |
static volatile bool tick_thread_cancel; // Flag: Cancel 60Hz thread |
| 331 |
static pthread_t tick_thread; // 60Hz thread |
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static pthread_t emul_thread; // MacOS thread |
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|
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static bool ready_for_signals = false; // Handler installed, signals can be sent |
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static int64 num_segv = 0; // Number of handled SEGV signals |
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|
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static struct sigaction sigusr2_action; // Interrupt signal (of emulator thread) |
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#if EMULATED_PPC |
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static uintptr sig_stack = 0; // Stack for PowerPC interrupt routine |
| 340 |
#else |
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static struct sigaction sigsegv_action; // Data access exception signal (of emulator thread) |
| 342 |
static struct sigaction sigill_action; // Illegal instruction signal (of emulator thread) |
| 343 |
static bool emul_thread_fatal = false; // Flag: MacOS thread crashed, tick thread shall dump debug output |
| 344 |
static sigregs sigsegv_regs; // Register dump when crashed |
| 345 |
static const char *crash_reason = NULL; // Reason of the crash (SIGSEGV, SIGBUS, SIGILL) |
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#endif |
| 347 |
|
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uint32 SheepMem::page_size; // Size of a native page |
| 349 |
uintptr SheepMem::zero_page = 0; // Address of ro page filled in with zeros |
| 350 |
uintptr SheepMem::base = 0x60000000; // Address of SheepShaver data |
| 351 |
uintptr SheepMem::proc; // Bottom address of SheepShave procedures |
| 352 |
uintptr SheepMem::data; // Top of SheepShaver data (stack like storage) |
| 353 |
|
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|
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// Prototypes |
| 356 |
static bool kernel_data_init(void); |
| 357 |
static void kernel_data_exit(void); |
| 358 |
static void Quit(void); |
| 359 |
static void *emul_func(void *arg); |
| 360 |
static void *nvram_func(void *arg); |
| 361 |
static void *tick_func(void *arg); |
| 362 |
#if EMULATED_PPC |
| 363 |
extern void emul_ppc(uint32 start); |
| 364 |
extern void init_emul_ppc(void); |
| 365 |
extern void exit_emul_ppc(void); |
| 366 |
sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t); |
| 367 |
#else |
| 368 |
static void sigusr2_handler(int sig, siginfo_t *sip, void *scp); |
| 369 |
static void sigsegv_handler(int sig, siginfo_t *sip, void *scp); |
| 370 |
static void sigill_handler(int sig, siginfo_t *sip, void *scp); |
| 371 |
#endif |
| 372 |
|
| 373 |
|
| 374 |
// From asm_linux.S |
| 375 |
#if !EMULATED_PPC |
| 376 |
extern "C" void *get_sp(void); |
| 377 |
extern "C" void *get_r2(void); |
| 378 |
extern "C" void set_r2(void *); |
| 379 |
extern "C" void *get_r13(void); |
| 380 |
extern "C" void set_r13(void *); |
| 381 |
extern "C" void flush_icache_range(uint32 start, uint32 end); |
| 382 |
extern "C" void jump_to_rom(uint32 entry, uint32 context); |
| 383 |
extern "C" void quit_emulator(void); |
| 384 |
extern "C" void execute_68k(uint32 pc, M68kRegisters *r); |
| 385 |
extern "C" void ppc_interrupt(uint32 entry, uint32 kernel_data); |
| 386 |
extern "C" int atomic_add(int *var, int v); |
| 387 |
extern "C" int atomic_and(int *var, int v); |
| 388 |
extern "C" int atomic_or(int *var, int v); |
| 389 |
extern void paranoia_check(void); |
| 390 |
#endif |
| 391 |
|
| 392 |
|
| 393 |
#if EMULATED_PPC |
| 394 |
/* |
| 395 |
* Return signal stack base |
| 396 |
*/ |
| 397 |
|
| 398 |
uintptr SignalStackBase(void) |
| 399 |
{ |
| 400 |
return sig_stack + SIG_STACK_SIZE; |
| 401 |
} |
| 402 |
|
| 403 |
|
| 404 |
/* |
| 405 |
* Atomic operations |
| 406 |
*/ |
| 407 |
|
| 408 |
#if HAVE_SPINLOCKS |
| 409 |
static spinlock_t atomic_ops_lock = SPIN_LOCK_UNLOCKED; |
| 410 |
#else |
| 411 |
#define spin_lock(LOCK) |
| 412 |
#define spin_unlock(LOCK) |
| 413 |
#endif |
| 414 |
|
| 415 |
int atomic_add(int *var, int v) |
| 416 |
{ |
| 417 |
spin_lock(&atomic_ops_lock); |
| 418 |
int ret = *var; |
| 419 |
*var += v; |
| 420 |
spin_unlock(&atomic_ops_lock); |
| 421 |
return ret; |
| 422 |
} |
| 423 |
|
| 424 |
int atomic_and(int *var, int v) |
| 425 |
{ |
| 426 |
spin_lock(&atomic_ops_lock); |
| 427 |
int ret = *var; |
| 428 |
*var &= v; |
| 429 |
spin_unlock(&atomic_ops_lock); |
| 430 |
return ret; |
| 431 |
} |
| 432 |
|
| 433 |
int atomic_or(int *var, int v) |
| 434 |
{ |
| 435 |
spin_lock(&atomic_ops_lock); |
| 436 |
int ret = *var; |
| 437 |
*var |= v; |
| 438 |
spin_unlock(&atomic_ops_lock); |
| 439 |
return ret; |
| 440 |
} |
| 441 |
#endif |
| 442 |
|
| 443 |
|
| 444 |
/* |
| 445 |
* Memory management helpers |
| 446 |
*/ |
| 447 |
|
| 448 |
static inline int vm_mac_acquire(uint32 addr, uint32 size) |
| 449 |
{ |
| 450 |
return vm_acquire_fixed(Mac2HostAddr(addr), size); |
| 451 |
} |
| 452 |
|
| 453 |
static inline int vm_mac_release(uint32 addr, uint32 size) |
| 454 |
{ |
| 455 |
return vm_release(Mac2HostAddr(addr), size); |
| 456 |
} |
| 457 |
|
| 458 |
|
| 459 |
/* |
| 460 |
* Main program |
| 461 |
*/ |
| 462 |
|
| 463 |
static void usage(const char *prg_name) |
| 464 |
{ |
| 465 |
printf("Usage: %s [OPTION...]\n", prg_name); |
| 466 |
printf("\nUnix options:\n"); |
| 467 |
printf(" --display STRING\n X display to use\n"); |
| 468 |
PrefsPrintUsage(); |
| 469 |
exit(0); |
| 470 |
} |
| 471 |
|
| 472 |
int main(int argc, char **argv) |
| 473 |
{ |
| 474 |
char str[256]; |
| 475 |
int rom_fd; |
| 476 |
FILE *proc_file; |
| 477 |
const char *rom_path; |
| 478 |
uint32 rom_size, actual; |
| 479 |
uint8 *rom_tmp; |
| 480 |
time_t now, expire; |
| 481 |
|
| 482 |
// Initialize variables |
| 483 |
RAMBase = 0; |
| 484 |
tzset(); |
| 485 |
|
| 486 |
// Print some info |
| 487 |
printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR); |
| 488 |
printf(" %s\n", GetString(STR_ABOUT_TEXT2)); |
| 489 |
|
| 490 |
#if !EMULATED_PPC |
| 491 |
#ifdef SYSTEM_CLOBBERS_R2 |
| 492 |
// Get TOC pointer |
| 493 |
TOC = get_r2(); |
| 494 |
#endif |
| 495 |
#ifdef SYSTEM_CLOBBERS_R13 |
| 496 |
// Get r13 register |
| 497 |
R13 = get_r13(); |
| 498 |
#endif |
| 499 |
#endif |
| 500 |
|
| 501 |
#ifdef ENABLE_GTK |
| 502 |
// Init GTK |
| 503 |
gtk_set_locale(); |
| 504 |
gtk_init(&argc, &argv); |
| 505 |
#endif |
| 506 |
|
| 507 |
// Read preferences |
| 508 |
PrefsInit(argc, argv); |
| 509 |
|
| 510 |
// Parse command line arguments |
| 511 |
for (int i=1; i<argc; i++) { |
| 512 |
if (strcmp(argv[i], "--help") == 0) { |
| 513 |
usage(argv[0]); |
| 514 |
#ifndef USE_SDL_VIDEO |
| 515 |
} else if (strcmp(argv[i], "--display") == 0) { |
| 516 |
i++; |
| 517 |
if (i < argc) |
| 518 |
x_display_name = strdup(argv[i]); |
| 519 |
#endif |
| 520 |
} else if (argv[i][0] == '-') { |
| 521 |
fprintf(stderr, "Unrecognized option '%s'\n", argv[i]); |
| 522 |
usage(argv[0]); |
| 523 |
} |
| 524 |
} |
| 525 |
|
| 526 |
#ifdef USE_SDL |
| 527 |
// Initialize SDL system |
| 528 |
int sdl_flags = 0; |
| 529 |
#ifdef USE_SDL_VIDEO |
| 530 |
sdl_flags |= SDL_INIT_VIDEO; |
| 531 |
#endif |
| 532 |
#ifdef USE_SDL_AUDIO |
| 533 |
sdl_flags |= SDL_INIT_AUDIO; |
| 534 |
#endif |
| 535 |
assert(sdl_flags != 0); |
| 536 |
if (SDL_Init(sdl_flags) == -1) { |
| 537 |
char str[256]; |
| 538 |
sprintf(str, "Could not initialize SDL: %s.\n", SDL_GetError()); |
| 539 |
ErrorAlert(str); |
| 540 |
goto quit; |
| 541 |
} |
| 542 |
atexit(SDL_Quit); |
| 543 |
#endif |
| 544 |
|
| 545 |
#ifndef USE_SDL_VIDEO |
| 546 |
// Open display |
| 547 |
x_display = XOpenDisplay(x_display_name); |
| 548 |
if (x_display == NULL) { |
| 549 |
char str[256]; |
| 550 |
sprintf(str, GetString(STR_NO_XSERVER_ERR), XDisplayName(x_display_name)); |
| 551 |
ErrorAlert(str); |
| 552 |
goto quit; |
| 553 |
} |
| 554 |
|
| 555 |
#if defined(ENABLE_XF86_DGA) && !defined(ENABLE_MON) |
| 556 |
// Fork out, so we can return from fullscreen mode when things get ugly |
| 557 |
XF86DGAForkApp(DefaultScreen(x_display)); |
| 558 |
#endif |
| 559 |
#endif |
| 560 |
|
| 561 |
#ifdef ENABLE_MON |
| 562 |
// Initialize mon |
| 563 |
mon_init(); |
| 564 |
#endif |
| 565 |
|
| 566 |
#if !EMULATED_PPC |
| 567 |
// Create and install stacks for signal handlers |
| 568 |
for (int i = 0; i < SIG_STACK_COUNT; i++) { |
| 569 |
void *sig_stack = malloc(SIG_STACK_SIZE); |
| 570 |
D(bug("Signal stack %d at %p\n", i, sig_stack)); |
| 571 |
if (sig_stack == NULL) { |
| 572 |
ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR)); |
| 573 |
goto quit; |
| 574 |
} |
| 575 |
sig_stacks[i].ss_sp = sig_stack; |
| 576 |
sig_stacks[i].ss_flags = 0; |
| 577 |
sig_stacks[i].ss_size = SIG_STACK_SIZE; |
| 578 |
} |
| 579 |
if (sig_stack_acquire() < 0) { |
| 580 |
sprintf(str, GetString(STR_SIGALTSTACK_ERR), strerror(errno)); |
| 581 |
ErrorAlert(str); |
| 582 |
goto quit; |
| 583 |
} |
| 584 |
#endif |
| 585 |
|
| 586 |
#if !EMULATED_PPC |
| 587 |
// Install SIGSEGV and SIGBUS handlers |
| 588 |
sigemptyset(&sigsegv_action.sa_mask); // Block interrupts during SEGV handling |
| 589 |
sigaddset(&sigsegv_action.sa_mask, SIGUSR2); |
| 590 |
sigsegv_action.sa_sigaction = sigsegv_handler; |
| 591 |
sigsegv_action.sa_flags = SA_ONSTACK | SA_SIGINFO; |
| 592 |
#ifdef HAVE_SIGNAL_SA_RESTORER |
| 593 |
sigsegv_action.sa_restorer = NULL; |
| 594 |
#endif |
| 595 |
if (sigaction(SIGSEGV, &sigsegv_action, NULL) < 0) { |
| 596 |
sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno)); |
| 597 |
ErrorAlert(str); |
| 598 |
goto quit; |
| 599 |
} |
| 600 |
if (sigaction(SIGBUS, &sigsegv_action, NULL) < 0) { |
| 601 |
sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno)); |
| 602 |
ErrorAlert(str); |
| 603 |
goto quit; |
| 604 |
} |
| 605 |
#else |
| 606 |
// Install SIGSEGV handler for CPU emulator |
| 607 |
if (!sigsegv_install_handler(sigsegv_handler)) { |
| 608 |
sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno)); |
| 609 |
ErrorAlert(str); |
| 610 |
goto quit; |
| 611 |
} |
| 612 |
#endif |
| 613 |
|
| 614 |
// Initialize VM system |
| 615 |
vm_init(); |
| 616 |
|
| 617 |
// Get system info |
| 618 |
PVR = 0x00040000; // Default: 604 |
| 619 |
CPUClockSpeed = 100000000; // Default: 100MHz |
| 620 |
BusClockSpeed = 100000000; // Default: 100MHz |
| 621 |
TimebaseSpeed = 25000000; // Default: 25MHz |
| 622 |
#if EMULATED_PPC |
| 623 |
PVR = 0x000c0000; // Default: 7400 (with AltiVec) |
| 624 |
#elif defined(__APPLE__) && defined(__MACH__) |
| 625 |
proc_file = popen("ioreg -c IOPlatformDevice", "r"); |
| 626 |
if (proc_file) { |
| 627 |
char line[256]; |
| 628 |
bool powerpc_node = false; |
| 629 |
while (fgets(line, sizeof(line) - 1, proc_file)) { |
| 630 |
// Read line |
| 631 |
int len = strlen(line); |
| 632 |
if (len == 0) |
| 633 |
continue; |
| 634 |
line[len - 1] = 0; |
| 635 |
|
| 636 |
// Parse line |
| 637 |
if (strstr(line, "o PowerPC,")) |
| 638 |
powerpc_node = true; |
| 639 |
else if (powerpc_node) { |
| 640 |
uint32 value; |
| 641 |
char head[256]; |
| 642 |
if (sscanf(line, "%[ |]\"cpu-version\" = <%x>", head, &value) == 2) |
| 643 |
PVR = value; |
| 644 |
else if (sscanf(line, "%[ |]\"clock-frequency\" = <%x>", head, &value) == 2) |
| 645 |
CPUClockSpeed = value; |
| 646 |
else if (sscanf(line, "%[ |]\"bus-frequency\" = <%x>", head, &value) == 2) |
| 647 |
BusClockSpeed = value; |
| 648 |
else if (sscanf(line, "%[ |]\"timebase-frequency\" = <%x>", head, &value) == 2) |
| 649 |
TimebaseSpeed = value; |
| 650 |
else if (strchr(line, '}')) |
| 651 |
powerpc_node = false; |
| 652 |
} |
| 653 |
} |
| 654 |
fclose(proc_file); |
| 655 |
} else { |
| 656 |
sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno)); |
| 657 |
WarningAlert(str); |
| 658 |
} |
| 659 |
#else |
| 660 |
proc_file = fopen("/proc/cpuinfo", "r"); |
| 661 |
if (proc_file) { |
| 662 |
// CPU specs from Linux kernel |
| 663 |
// TODO: make it more generic with features (e.g. AltiVec) and |
| 664 |
// cache information and friends for NameRegistry |
| 665 |
static const struct { |
| 666 |
uint32 pvr_mask; |
| 667 |
uint32 pvr_value; |
| 668 |
const char *cpu_name; |
| 669 |
} |
| 670 |
cpu_specs[] = { |
| 671 |
{ 0xffff0000, 0x00010000, "601" }, |
| 672 |
{ 0xffff0000, 0x00030000, "603" }, |
| 673 |
{ 0xffff0000, 0x00060000, "603e" }, |
| 674 |
{ 0xffff0000, 0x00070000, "603ev" }, |
| 675 |
{ 0xffff0000, 0x00040000, "604" }, |
| 676 |
{ 0xfffff000, 0x00090000, "604e" }, |
| 677 |
{ 0xffff0000, 0x00090000, "604r" }, |
| 678 |
{ 0xffff0000, 0x000a0000, "604ev" }, |
| 679 |
{ 0xffffffff, 0x00084202, "740/750" }, |
| 680 |
{ 0xfffff000, 0x00083000, "745/755" }, |
| 681 |
{ 0xfffffff0, 0x00080100, "750CX" }, |
| 682 |
{ 0xfffffff0, 0x00082200, "750CX" }, |
| 683 |
{ 0xfffffff0, 0x00082210, "750CXe" }, |
| 684 |
{ 0xffffff00, 0x70000100, "750FX" }, |
| 685 |
{ 0xffffffff, 0x70000200, "750FX" }, |
| 686 |
{ 0xffff0000, 0x70000000, "750FX" }, |
| 687 |
{ 0xffff0000, 0x70020000, "750GX" }, |
| 688 |
{ 0xffff0000, 0x00080000, "740/750" }, |
| 689 |
{ 0xffffffff, 0x000c1101, "7400 (1.1)" }, |
| 690 |
{ 0xffff0000, 0x000c0000, "7400" }, |
| 691 |
{ 0xffff0000, 0x800c0000, "7410" }, |
| 692 |
{ 0xffffffff, 0x80000200, "7450" }, |
| 693 |
{ 0xffffffff, 0x80000201, "7450" }, |
| 694 |
{ 0xffff0000, 0x80000000, "7450" }, |
| 695 |
{ 0xffffff00, 0x80010100, "7455" }, |
| 696 |
{ 0xffffffff, 0x80010200, "7455" }, |
| 697 |
{ 0xffff0000, 0x80010000, "7455" }, |
| 698 |
{ 0xffff0000, 0x80020000, "7457" }, |
| 699 |
{ 0xffff0000, 0x80030000, "7447A" }, |
| 700 |
{ 0x7fff0000, 0x00810000, "82xx" }, |
| 701 |
{ 0x7fff0000, 0x00820000, "8280" }, |
| 702 |
{ 0xffff0000, 0x00400000, "Power3 (630)" }, |
| 703 |
{ 0xffff0000, 0x00410000, "Power3 (630+)" }, |
| 704 |
{ 0xffff0000, 0x00360000, "I-star" }, |
| 705 |
{ 0xffff0000, 0x00370000, "S-star" }, |
| 706 |
{ 0xffff0000, 0x00350000, "Power4" }, |
| 707 |
{ 0xffff0000, 0x00390000, "PPC970" }, |
| 708 |
{ 0, 0, 0 } |
| 709 |
}; |
| 710 |
|
| 711 |
char line[256]; |
| 712 |
while(fgets(line, 255, proc_file)) { |
| 713 |
// Read line |
| 714 |
int len = strlen(line); |
| 715 |
if (len == 0) |
| 716 |
continue; |
| 717 |
line[len-1] = 0; |
| 718 |
|
| 719 |
// Parse line |
| 720 |
int i; |
| 721 |
char value[256]; |
| 722 |
if (sscanf(line, "cpu : %[0-9A-Za-a]", value) == 1) { |
| 723 |
// Search by name |
| 724 |
const char *cpu_name = NULL; |
| 725 |
for (int i = 0; cpu_specs[i].pvr_mask != 0; i++) { |
| 726 |
if (strcmp(cpu_specs[i].cpu_name, value) == 0) { |
| 727 |
cpu_name = cpu_specs[i].cpu_name; |
| 728 |
PVR = cpu_specs[i].pvr_value; |
| 729 |
break; |
| 730 |
} |
| 731 |
} |
| 732 |
if (cpu_name == NULL) |
| 733 |
printf("WARNING: Unknown CPU type '%s', assuming 604\n", value); |
| 734 |
else |
| 735 |
printf("Found a PowerPC %s processor\n", cpu_name); |
| 736 |
} |
| 737 |
if (sscanf(line, "clock : %dMHz", &i) == 1) |
| 738 |
CPUClockSpeed = BusClockSpeed = i * 1000000; |
| 739 |
} |
| 740 |
fclose(proc_file); |
| 741 |
} else { |
| 742 |
sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno)); |
| 743 |
WarningAlert(str); |
| 744 |
} |
| 745 |
|
| 746 |
// Get actual bus frequency |
| 747 |
proc_file = fopen("/proc/device-tree/clock-frequency", "r"); |
| 748 |
if (proc_file) { |
| 749 |
union { uint8 b[4]; uint32 l; } value; |
| 750 |
if (fread(value.b, sizeof(value), 1, proc_file) == 1) |
| 751 |
BusClockSpeed = value.l; |
| 752 |
fclose(proc_file); |
| 753 |
} |
| 754 |
|
| 755 |
// Get actual timebase frequency |
| 756 |
TimebaseSpeed = BusClockSpeed / 4; |
| 757 |
DIR *cpus_dir; |
| 758 |
if ((cpus_dir = opendir("/proc/device-tree/cpus")) != NULL) { |
| 759 |
struct dirent *cpu_entry; |
| 760 |
while ((cpu_entry = readdir(cpus_dir)) != NULL) { |
| 761 |
if (strstr(cpu_entry->d_name, "PowerPC,") == cpu_entry->d_name) { |
| 762 |
char timebase_freq_node[256]; |
| 763 |
sprintf(timebase_freq_node, "/proc/device-tree/cpus/%s/timebase-frequency", cpu_entry->d_name); |
| 764 |
proc_file = fopen(timebase_freq_node, "r"); |
| 765 |
if (proc_file) { |
| 766 |
union { uint8 b[4]; uint32 l; } value; |
| 767 |
if (fread(value.b, sizeof(value), 1, proc_file) == 1) |
| 768 |
TimebaseSpeed = value.l; |
| 769 |
fclose(proc_file); |
| 770 |
} |
| 771 |
} |
| 772 |
} |
| 773 |
closedir(cpus_dir); |
| 774 |
} |
| 775 |
#endif |
| 776 |
// Remap any newer G4/G5 processor to plain G4 for compatibility |
| 777 |
switch (PVR >> 16) { |
| 778 |
case 0x8000: // 7450 |
| 779 |
case 0x8001: // 7455 |
| 780 |
case 0x8002: // 7457 |
| 781 |
case 0x0039: // 970 |
| 782 |
PVR = 0x000c0000; // 7400 |
| 783 |
break; |
| 784 |
} |
| 785 |
D(bug("PVR: %08x (assumed)\n", PVR)); |
| 786 |
|
| 787 |
// Init system routines |
| 788 |
SysInit(); |
| 789 |
|
| 790 |
// Show preferences editor |
| 791 |
if (!PrefsFindBool("nogui")) |
| 792 |
if (!PrefsEditor()) |
| 793 |
goto quit; |
| 794 |
|
| 795 |
#if !EMULATED_PPC |
| 796 |
// Check some things |
| 797 |
paranoia_check(); |
| 798 |
#endif |
| 799 |
|
| 800 |
// Open /dev/zero |
| 801 |
zero_fd = open("/dev/zero", O_RDWR); |
| 802 |
if (zero_fd < 0) { |
| 803 |
sprintf(str, GetString(STR_NO_DEV_ZERO_ERR), strerror(errno)); |
| 804 |
ErrorAlert(str); |
| 805 |
goto quit; |
| 806 |
} |
| 807 |
|
| 808 |
#ifndef PAGEZERO_HACK |
| 809 |
// Create Low Memory area (0x0000..0x3000) |
| 810 |
if (vm_mac_acquire(0, 0x3000) < 0) { |
| 811 |
sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno)); |
| 812 |
ErrorAlert(str); |
| 813 |
goto quit; |
| 814 |
} |
| 815 |
lm_area_mapped = true; |
| 816 |
#endif |
| 817 |
|
| 818 |
// Create areas for Kernel Data |
| 819 |
if (!kernel_data_init()) |
| 820 |
goto quit; |
| 821 |
kernel_data = (KernelData *)Mac2HostAddr(KERNEL_DATA_BASE); |
| 822 |
emulator_data = &kernel_data->ed; |
| 823 |
KernelDataAddr = KERNEL_DATA_BASE; |
| 824 |
D(bug("Kernel Data at %p (%08x)\n", kernel_data, KERNEL_DATA_BASE)); |
| 825 |
D(bug("Emulator Data at %p (%08x)\n", emulator_data, KERNEL_DATA_BASE + offsetof(KernelData, ed))); |
| 826 |
|
| 827 |
// Create area for DR Cache |
| 828 |
if (vm_mac_acquire(DR_EMULATOR_BASE, DR_EMULATOR_SIZE) < 0) { |
| 829 |
sprintf(str, GetString(STR_DR_EMULATOR_MMAP_ERR), strerror(errno)); |
| 830 |
ErrorAlert(str); |
| 831 |
goto quit; |
| 832 |
} |
| 833 |
dr_emulator_area_mapped = true; |
| 834 |
if (vm_mac_acquire(DR_CACHE_BASE, DR_CACHE_SIZE) < 0) { |
| 835 |
sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno)); |
| 836 |
ErrorAlert(str); |
| 837 |
goto quit; |
| 838 |
} |
| 839 |
dr_cache_area_mapped = true; |
| 840 |
#if !EMULATED_PPC |
| 841 |
if (vm_protect((char *)DR_CACHE_BASE, DR_CACHE_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) { |
| 842 |
sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno)); |
| 843 |
ErrorAlert(str); |
| 844 |
goto quit; |
| 845 |
} |
| 846 |
#endif |
| 847 |
DRCacheAddr = DR_CACHE_BASE; |
| 848 |
D(bug("DR Cache at %p\n", DRCacheAddr)); |
| 849 |
|
| 850 |
// Create area for SheepShaver data |
| 851 |
if (!SheepMem::Init()) { |
| 852 |
sprintf(str, GetString(STR_SHEEP_MEM_MMAP_ERR), strerror(errno)); |
| 853 |
ErrorAlert(str); |
| 854 |
goto quit; |
| 855 |
} |
| 856 |
|
| 857 |
// Create area for Mac ROM |
| 858 |
if (vm_mac_acquire(ROM_BASE, ROM_AREA_SIZE) < 0) { |
| 859 |
sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno)); |
| 860 |
ErrorAlert(str); |
| 861 |
goto quit; |
| 862 |
} |
| 863 |
ROMBaseHost = Mac2HostAddr(ROM_BASE); |
| 864 |
#if !EMULATED_PPC |
| 865 |
if (vm_protect(ROMBaseHost, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) { |
| 866 |
sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno)); |
| 867 |
ErrorAlert(str); |
| 868 |
goto quit; |
| 869 |
} |
| 870 |
#endif |
| 871 |
rom_area_mapped = true; |
| 872 |
D(bug("ROM area at %p (%08x)\n", ROMBaseHost, ROM_BASE)); |
| 873 |
|
| 874 |
// Create area for Mac RAM |
| 875 |
RAMSize = PrefsFindInt32("ramsize"); |
| 876 |
if (RAMSize < 8*1024*1024) { |
| 877 |
WarningAlert(GetString(STR_SMALL_RAM_WARN)); |
| 878 |
RAMSize = 8*1024*1024; |
| 879 |
} |
| 880 |
|
| 881 |
if (vm_mac_acquire(RAM_BASE, RAMSize) < 0) { |
| 882 |
sprintf(str, GetString(STR_RAM_MMAP_ERR), strerror(errno)); |
| 883 |
ErrorAlert(str); |
| 884 |
goto quit; |
| 885 |
} |
| 886 |
RAMBaseHost = Mac2HostAddr(RAM_BASE); |
| 887 |
#if !EMULATED_PPC |
| 888 |
if (vm_protect(RAMBaseHost, RAMSize, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) { |
| 889 |
sprintf(str, GetString(STR_RAM_MMAP_ERR), strerror(errno)); |
| 890 |
ErrorAlert(str); |
| 891 |
goto quit; |
| 892 |
} |
| 893 |
#endif |
| 894 |
RAMBase = RAM_BASE; |
| 895 |
ram_area_mapped = true; |
| 896 |
D(bug("RAM area at %p (%08x)\n", RAMBaseHost, RAMBase)); |
| 897 |
|
| 898 |
if (RAMBase > ROM_BASE) { |
| 899 |
ErrorAlert(GetString(STR_RAM_HIGHER_THAN_ROM_ERR)); |
| 900 |
goto quit; |
| 901 |
} |
| 902 |
|
| 903 |
// Load Mac ROM |
| 904 |
rom_path = PrefsFindString("rom"); |
| 905 |
rom_fd = open(rom_path ? rom_path : ROM_FILE_NAME, O_RDONLY); |
| 906 |
if (rom_fd < 0) { |
| 907 |
rom_fd = open(rom_path ? rom_path : ROM_FILE_NAME2, O_RDONLY); |
| 908 |
if (rom_fd < 0) { |
| 909 |
ErrorAlert(GetString(STR_NO_ROM_FILE_ERR)); |
| 910 |
goto quit; |
| 911 |
} |
| 912 |
} |
| 913 |
printf(GetString(STR_READING_ROM_FILE)); |
| 914 |
rom_size = lseek(rom_fd, 0, SEEK_END); |
| 915 |
lseek(rom_fd, 0, SEEK_SET); |
| 916 |
rom_tmp = new uint8[ROM_SIZE]; |
| 917 |
actual = read(rom_fd, (void *)rom_tmp, ROM_SIZE); |
| 918 |
close(rom_fd); |
| 919 |
|
| 920 |
// Decode Mac ROM |
| 921 |
if (!DecodeROM(rom_tmp, actual)) { |
| 922 |
if (rom_size != 4*1024*1024) { |
| 923 |
ErrorAlert(GetString(STR_ROM_SIZE_ERR)); |
| 924 |
goto quit; |
| 925 |
} else { |
| 926 |
ErrorAlert(GetString(STR_ROM_FILE_READ_ERR)); |
| 927 |
goto quit; |
| 928 |
} |
| 929 |
} |
| 930 |
delete[] rom_tmp; |
| 931 |
|
| 932 |
// Initialize everything |
| 933 |
if (!InitAll()) |
| 934 |
goto quit; |
| 935 |
D(bug("Initialization complete\n")); |
| 936 |
|
| 937 |
// Clear caches (as we loaded and patched code) and write protect ROM |
| 938 |
#if !EMULATED_PPC |
| 939 |
flush_icache_range(ROM_BASE, ROM_BASE + ROM_AREA_SIZE); |
| 940 |
#endif |
| 941 |
vm_protect(ROMBaseHost, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_EXECUTE); |
| 942 |
|
| 943 |
// Start 60Hz thread |
| 944 |
tick_thread_cancel = false; |
| 945 |
tick_thread_active = (pthread_create(&tick_thread, NULL, tick_func, NULL) == 0); |
| 946 |
D(bug("Tick thread installed (%ld)\n", tick_thread)); |
| 947 |
|
| 948 |
// Start NVRAM watchdog thread |
| 949 |
memcpy(last_xpram, XPRAM, XPRAM_SIZE); |
| 950 |
nvram_thread_cancel = false; |
| 951 |
nvram_thread_active = (pthread_create(&nvram_thread, NULL, nvram_func, NULL) == 0); |
| 952 |
D(bug("NVRAM thread installed (%ld)\n", nvram_thread)); |
| 953 |
|
| 954 |
#if !EMULATED_PPC |
| 955 |
// Install SIGILL handler |
| 956 |
sigemptyset(&sigill_action.sa_mask); // Block interrupts during ILL handling |
| 957 |
sigaddset(&sigill_action.sa_mask, SIGUSR2); |
| 958 |
sigill_action.sa_sigaction = sigill_handler; |
| 959 |
sigill_action.sa_flags = SA_ONSTACK | SA_SIGINFO; |
| 960 |
#ifdef HAVE_SIGNAL_SA_RESTORER |
| 961 |
sigill_action.sa_restorer = NULL; |
| 962 |
#endif |
| 963 |
if (sigaction(SIGILL, &sigill_action, NULL) < 0) { |
| 964 |
sprintf(str, GetString(STR_SIGILL_INSTALL_ERR), strerror(errno)); |
| 965 |
ErrorAlert(str); |
| 966 |
goto quit; |
| 967 |
} |
| 968 |
#endif |
| 969 |
|
| 970 |
#if !EMULATED_PPC |
| 971 |
// Install interrupt signal handler |
| 972 |
sigemptyset(&sigusr2_action.sa_mask); |
| 973 |
sigusr2_action.sa_sigaction = sigusr2_handler; |
| 974 |
sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART | SA_SIGINFO; |
| 975 |
#ifdef HAVE_SIGNAL_SA_RESTORER |
| 976 |
sigusr2_action.sa_restorer = NULL; |
| 977 |
#endif |
| 978 |
if (sigaction(SIGUSR2, &sigusr2_action, NULL) < 0) { |
| 979 |
sprintf(str, GetString(STR_SIGUSR2_INSTALL_ERR), strerror(errno)); |
| 980 |
ErrorAlert(str); |
| 981 |
goto quit; |
| 982 |
} |
| 983 |
#endif |
| 984 |
|
| 985 |
// Get my thread ID and execute MacOS thread function |
| 986 |
emul_thread = pthread_self(); |
| 987 |
D(bug("MacOS thread is %ld\n", emul_thread)); |
| 988 |
emul_func(NULL); |
| 989 |
|
| 990 |
quit: |
| 991 |
Quit(); |
| 992 |
return 0; |
| 993 |
} |
| 994 |
|
| 995 |
|
| 996 |
/* |
| 997 |
* Cleanup and quit |
| 998 |
*/ |
| 999 |
|
| 1000 |
static void Quit(void) |
| 1001 |
{ |
| 1002 |
#if EMULATED_PPC |
| 1003 |
// Exit PowerPC emulation |
| 1004 |
exit_emul_ppc(); |
| 1005 |
#endif |
| 1006 |
|
| 1007 |
// Stop 60Hz thread |
| 1008 |
if (tick_thread_active) { |
| 1009 |
tick_thread_cancel = true; |
| 1010 |
pthread_cancel(tick_thread); |
| 1011 |
pthread_join(tick_thread, NULL); |
| 1012 |
} |
| 1013 |
|
| 1014 |
// Stop NVRAM watchdog thread |
| 1015 |
if (nvram_thread_active) { |
| 1016 |
nvram_thread_cancel = true; |
| 1017 |
pthread_cancel(nvram_thread); |
| 1018 |
pthread_join(nvram_thread, NULL); |
| 1019 |
} |
| 1020 |
|
| 1021 |
#if !EMULATED_PPC |
| 1022 |
// Uninstall SIGSEGV and SIGBUS handlers |
| 1023 |
sigemptyset(&sigsegv_action.sa_mask); |
| 1024 |
sigsegv_action.sa_handler = SIG_DFL; |
| 1025 |
sigsegv_action.sa_flags = 0; |
| 1026 |
sigaction(SIGSEGV, &sigsegv_action, NULL); |
| 1027 |
sigaction(SIGBUS, &sigsegv_action, NULL); |
| 1028 |
|
| 1029 |
// Uninstall SIGILL handler |
| 1030 |
sigemptyset(&sigill_action.sa_mask); |
| 1031 |
sigill_action.sa_handler = SIG_DFL; |
| 1032 |
sigill_action.sa_flags = 0; |
| 1033 |
sigaction(SIGILL, &sigill_action, NULL); |
| 1034 |
|
| 1035 |
// Delete stacks for signal handlers |
| 1036 |
for (int i = 0; i < SIG_STACK_COUNT; i++) { |
| 1037 |
void *sig_stack = sig_stacks[i].ss_sp; |
| 1038 |
if (sig_stack) |
| 1039 |
free(sig_stack); |
| 1040 |
} |
| 1041 |
#endif |
| 1042 |
|
| 1043 |
// Deinitialize everything |
| 1044 |
ExitAll(); |
| 1045 |
|
| 1046 |
// Delete SheepShaver globals |
| 1047 |
SheepMem::Exit(); |
| 1048 |
|
| 1049 |
// Delete RAM area |
| 1050 |
if (ram_area_mapped) |
| 1051 |
vm_mac_release(RAM_BASE, RAMSize); |
| 1052 |
|
| 1053 |
// Delete ROM area |
| 1054 |
if (rom_area_mapped) |
| 1055 |
vm_mac_release(ROM_BASE, ROM_AREA_SIZE); |
| 1056 |
|
| 1057 |
// Delete DR cache areas |
| 1058 |
if (dr_emulator_area_mapped) |
| 1059 |
vm_mac_release(DR_EMULATOR_BASE, DR_EMULATOR_SIZE); |
| 1060 |
if (dr_cache_area_mapped) |
| 1061 |
vm_mac_release(DR_CACHE_BASE, DR_CACHE_SIZE); |
| 1062 |
|
| 1063 |
// Delete Kernel Data area |
| 1064 |
kernel_data_exit(); |
| 1065 |
|
| 1066 |
// Delete Low Memory area |
| 1067 |
if (lm_area_mapped) |
| 1068 |
vm_mac_release(0, 0x3000); |
| 1069 |
|
| 1070 |
// Close /dev/zero |
| 1071 |
if (zero_fd > 0) |
| 1072 |
close(zero_fd); |
| 1073 |
|
| 1074 |
// Exit system routines |
| 1075 |
SysExit(); |
| 1076 |
|
| 1077 |
// Exit preferences |
| 1078 |
PrefsExit(); |
| 1079 |
|
| 1080 |
#ifdef ENABLE_MON |
| 1081 |
// Exit mon |
| 1082 |
mon_exit(); |
| 1083 |
#endif |
| 1084 |
|
| 1085 |
// Close X11 server connection |
| 1086 |
#ifndef USE_SDL_VIDEO |
| 1087 |
if (x_display) |
| 1088 |
XCloseDisplay(x_display); |
| 1089 |
#endif |
| 1090 |
|
| 1091 |
exit(0); |
| 1092 |
} |
| 1093 |
|
| 1094 |
|
| 1095 |
/* |
| 1096 |
* Initialize Kernel Data segments |
| 1097 |
*/ |
| 1098 |
|
| 1099 |
#if defined(__CYGWIN__) |
| 1100 |
#define WIN32_LEAN_AND_MEAN |
| 1101 |
#include <windows.h> |
| 1102 |
|
| 1103 |
static HANDLE kernel_handle; // Shared memory handle for Kernel Data |
| 1104 |
static DWORD allocation_granule; // Minimum size of allocateable are (64K) |
| 1105 |
static DWORD kernel_area_size; // Size of Kernel Data area |
| 1106 |
#endif |
| 1107 |
|
| 1108 |
static bool kernel_data_init(void) |
| 1109 |
{ |
| 1110 |
char str[256]; |
| 1111 |
#ifdef _WIN32 |
| 1112 |
SYSTEM_INFO si; |
| 1113 |
GetSystemInfo(&si); |
| 1114 |
allocation_granule = si.dwAllocationGranularity; |
| 1115 |
kernel_area_size = (KERNEL_AREA_SIZE + allocation_granule - 1) & -allocation_granule; |
| 1116 |
|
| 1117 |
char rcs[10]; |
| 1118 |
LPVOID kernel_addr; |
| 1119 |
kernel_handle = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, kernel_area_size, NULL); |
| 1120 |
if (kernel_handle == NULL) { |
| 1121 |
sprintf(rcs, "%d", GetLastError()); |
| 1122 |
sprintf(str, GetString(STR_KD_SHMGET_ERR), rcs); |
| 1123 |
ErrorAlert(str); |
| 1124 |
return false; |
| 1125 |
} |
| 1126 |
kernel_addr = (LPVOID)Mac2HostAddr(KERNEL_DATA_BASE & -allocation_granule); |
| 1127 |
if (MapViewOfFileEx(kernel_handle, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, kernel_area_size, kernel_addr) != kernel_addr) { |
| 1128 |
sprintf(rcs, "%d", GetLastError()); |
| 1129 |
sprintf(str, GetString(STR_KD_SHMAT_ERR), rcs); |
| 1130 |
ErrorAlert(str); |
| 1131 |
return false; |
| 1132 |
} |
| 1133 |
kernel_addr = (LPVOID)Mac2HostAddr(KERNEL_DATA2_BASE & -allocation_granule); |
| 1134 |
if (MapViewOfFileEx(kernel_handle, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, kernel_area_size, kernel_addr) != kernel_addr) { |
| 1135 |
sprintf(rcs, "%d", GetLastError()); |
| 1136 |
sprintf(str, GetString(STR_KD2_SHMAT_ERR), rcs); |
| 1137 |
ErrorAlert(str); |
| 1138 |
return false; |
| 1139 |
} |
| 1140 |
#else |
| 1141 |
kernel_area = shmget(IPC_PRIVATE, KERNEL_AREA_SIZE, 0600); |
| 1142 |
if (kernel_area == -1) { |
| 1143 |
sprintf(str, GetString(STR_KD_SHMGET_ERR), strerror(errno)); |
| 1144 |
ErrorAlert(str); |
| 1145 |
return false; |
| 1146 |
} |
| 1147 |
if (shmat(kernel_area, Mac2HostAddr(KERNEL_DATA_BASE), 0) < 0) { |
| 1148 |
sprintf(str, GetString(STR_KD_SHMAT_ERR), strerror(errno)); |
| 1149 |
ErrorAlert(str); |
| 1150 |
return false; |
| 1151 |
} |
| 1152 |
if (shmat(kernel_area, Mac2HostAddr(KERNEL_DATA2_BASE), 0) < 0) { |
| 1153 |
sprintf(str, GetString(STR_KD2_SHMAT_ERR), strerror(errno)); |
| 1154 |
ErrorAlert(str); |
| 1155 |
return false; |
| 1156 |
} |
| 1157 |
#endif |
| 1158 |
return true; |
| 1159 |
} |
| 1160 |
|
| 1161 |
|
| 1162 |
/* |
| 1163 |
* Deallocate Kernel Data segments |
| 1164 |
*/ |
| 1165 |
|
| 1166 |
static void kernel_data_exit(void) |
| 1167 |
{ |
| 1168 |
#ifdef _WIN32 |
| 1169 |
if (kernel_handle) { |
| 1170 |
UnmapViewOfFile(Mac2HostAddr(KERNEL_DATA_BASE & -allocation_granule)); |
| 1171 |
UnmapViewOfFile(Mac2HostAddr(KERNEL_DATA2_BASE & -allocation_granule)); |
| 1172 |
CloseHandle(kernel_handle); |
| 1173 |
} |
| 1174 |
#else |
| 1175 |
if (kernel_area >= 0) { |
| 1176 |
shmdt(Mac2HostAddr(KERNEL_DATA_BASE)); |
| 1177 |
shmdt(Mac2HostAddr(KERNEL_DATA2_BASE)); |
| 1178 |
shmctl(kernel_area, IPC_RMID, NULL); |
| 1179 |
} |
| 1180 |
#endif |
| 1181 |
} |
| 1182 |
|
| 1183 |
|
| 1184 |
/* |
| 1185 |
* Jump into Mac ROM, start 680x0 emulator |
| 1186 |
*/ |
| 1187 |
|
| 1188 |
#if EMULATED_PPC |
| 1189 |
void jump_to_rom(uint32 entry) |
| 1190 |
{ |
| 1191 |
init_emul_ppc(); |
| 1192 |
emul_ppc(entry); |
| 1193 |
} |
| 1194 |
#endif |
| 1195 |
|
| 1196 |
|
| 1197 |
/* |
| 1198 |
* Emulator thread function |
| 1199 |
*/ |
| 1200 |
|
| 1201 |
static void *emul_func(void *arg) |
| 1202 |
{ |
| 1203 |
// We're now ready to receive signals |
| 1204 |
ready_for_signals = true; |
| 1205 |
|
| 1206 |
// Decrease priority, so more time-critical things like audio will work better |
| 1207 |
nice(1); |
| 1208 |
|
| 1209 |
// Jump to ROM boot routine |
| 1210 |
D(bug("Jumping to ROM\n")); |
| 1211 |
#if EMULATED_PPC |
| 1212 |
jump_to_rom(ROM_BASE + 0x310000); |
| 1213 |
#else |
| 1214 |
jump_to_rom(ROM_BASE + 0x310000, (uint32)emulator_data); |
| 1215 |
#endif |
| 1216 |
D(bug("Returned from ROM\n")); |
| 1217 |
|
| 1218 |
// We're no longer ready to receive signals |
| 1219 |
ready_for_signals = false; |
| 1220 |
return NULL; |
| 1221 |
} |
| 1222 |
|
| 1223 |
|
| 1224 |
#if !EMULATED_PPC |
| 1225 |
/* |
| 1226 |
* Execute 68k subroutine (must be ended with RTS) |
| 1227 |
* This must only be called by the emul_thread when in EMUL_OP mode |
| 1228 |
* r->a[7] is unused, the routine runs on the caller's stack |
| 1229 |
*/ |
| 1230 |
|
| 1231 |
void Execute68k(uint32 pc, M68kRegisters *r) |
| 1232 |
{ |
| 1233 |
#if SAFE_EXEC_68K |
| 1234 |
if (ReadMacInt32(XLM_RUN_MODE) != MODE_EMUL_OP) |
| 1235 |
printf("FATAL: Execute68k() not called from EMUL_OP mode\n"); |
| 1236 |
if (!pthread_equal(pthread_self(), emul_thread)) |
| 1237 |
printf("FATAL: Execute68k() not called from emul_thread\n"); |
| 1238 |
#endif |
| 1239 |
execute_68k(pc, r); |
| 1240 |
} |
| 1241 |
|
| 1242 |
|
| 1243 |
/* |
| 1244 |
* Execute 68k A-Trap from EMUL_OP routine |
| 1245 |
* r->a[7] is unused, the routine runs on the caller's stack |
| 1246 |
*/ |
| 1247 |
|
| 1248 |
void Execute68kTrap(uint16 trap, M68kRegisters *r) |
| 1249 |
{ |
| 1250 |
uint16 proc[2] = {trap, M68K_RTS}; |
| 1251 |
Execute68k((uint32)proc, r); |
| 1252 |
} |
| 1253 |
#endif |
| 1254 |
|
| 1255 |
|
| 1256 |
/* |
| 1257 |
* Quit emulator (cause return from jump_to_rom) |
| 1258 |
*/ |
| 1259 |
|
| 1260 |
void QuitEmulator(void) |
| 1261 |
{ |
| 1262 |
#if EMULATED_PPC |
| 1263 |
Quit(); |
| 1264 |
#else |
| 1265 |
quit_emulator(); |
| 1266 |
#endif |
| 1267 |
} |
| 1268 |
|
| 1269 |
|
| 1270 |
/* |
| 1271 |
* Dump 68k registers |
| 1272 |
*/ |
| 1273 |
|
| 1274 |
void Dump68kRegs(M68kRegisters *r) |
| 1275 |
{ |
| 1276 |
// Display 68k registers |
| 1277 |
for (int i=0; i<8; i++) { |
| 1278 |
printf("d%d: %08x", i, r->d[i]); |
| 1279 |
if (i == 3 || i == 7) |
| 1280 |
printf("\n"); |
| 1281 |
else |
| 1282 |
printf(", "); |
| 1283 |
} |
| 1284 |
for (int i=0; i<8; i++) { |
| 1285 |
printf("a%d: %08x", i, r->a[i]); |
| 1286 |
if (i == 3 || i == 7) |
| 1287 |
printf("\n"); |
| 1288 |
else |
| 1289 |
printf(", "); |
| 1290 |
} |
| 1291 |
} |
| 1292 |
|
| 1293 |
|
| 1294 |
/* |
| 1295 |
* Make code executable |
| 1296 |
*/ |
| 1297 |
|
| 1298 |
void MakeExecutable(int dummy, uint32 start, uint32 length) |
| 1299 |
{ |
| 1300 |
if ((start >= ROM_BASE) && (start < (ROM_BASE + ROM_SIZE))) |
| 1301 |
return; |
| 1302 |
#if EMULATED_PPC |
| 1303 |
FlushCodeCache(start, start + length); |
| 1304 |
#else |
| 1305 |
flush_icache_range(start, start + length); |
| 1306 |
#endif |
| 1307 |
} |
| 1308 |
|
| 1309 |
|
| 1310 |
/* |
| 1311 |
* NVRAM watchdog thread (saves NVRAM every minute) |
| 1312 |
*/ |
| 1313 |
|
| 1314 |
static void nvram_watchdog(void) |
| 1315 |
{ |
| 1316 |
if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) { |
| 1317 |
memcpy(last_xpram, XPRAM, XPRAM_SIZE); |
| 1318 |
SaveXPRAM(); |
| 1319 |
} |
| 1320 |
} |
| 1321 |
|
| 1322 |
static void *nvram_func(void *arg) |
| 1323 |
{ |
| 1324 |
while (!nvram_thread_cancel) { |
| 1325 |
for (int i=0; i<60 && !nvram_thread_cancel; i++) |
| 1326 |
Delay_usec(999999); // Only wait 1 second so we quit promptly when nvram_thread_cancel becomes true |
| 1327 |
nvram_watchdog(); |
| 1328 |
} |
| 1329 |
return NULL; |
| 1330 |
} |
| 1331 |
|
| 1332 |
|
| 1333 |
/* |
| 1334 |
* 60Hz thread (really 60.15Hz) |
| 1335 |
*/ |
| 1336 |
|
| 1337 |
static void *tick_func(void *arg) |
| 1338 |
{ |
| 1339 |
int tick_counter = 0; |
| 1340 |
uint64 start = GetTicks_usec(); |
| 1341 |
int64 ticks = 0; |
| 1342 |
uint64 next = GetTicks_usec(); |
| 1343 |
|
| 1344 |
while (!tick_thread_cancel) { |
| 1345 |
|
| 1346 |
// Wait |
| 1347 |
next += 16625; |
| 1348 |
int64 delay = next - GetTicks_usec(); |
| 1349 |
if (delay > 0) |
| 1350 |
Delay_usec(delay); |
| 1351 |
else if (delay < -16625) |
| 1352 |
next = GetTicks_usec(); |
| 1353 |
ticks++; |
| 1354 |
|
| 1355 |
#if !EMULATED_PPC |
| 1356 |
// Did we crash? |
| 1357 |
if (emul_thread_fatal) { |
| 1358 |
|
| 1359 |
// Yes, dump registers |
| 1360 |
sigregs *r = &sigsegv_regs; |
| 1361 |
char str[256]; |
| 1362 |
if (crash_reason == NULL) |
| 1363 |
crash_reason = "SIGSEGV"; |
| 1364 |
sprintf(str, "%s\n" |
| 1365 |
" pc %08lx lr %08lx ctr %08lx msr %08lx\n" |
| 1366 |
" xer %08lx cr %08lx \n" |
| 1367 |
" r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n" |
| 1368 |
" r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n" |
| 1369 |
" r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n" |
| 1370 |
" r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n" |
| 1371 |
" r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n" |
| 1372 |
" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n" |
| 1373 |
" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n" |
| 1374 |
" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n", |
| 1375 |
crash_reason, |
| 1376 |
r->nip, r->link, r->ctr, r->msr, |
| 1377 |
r->xer, r->ccr, |
| 1378 |
r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3], |
| 1379 |
r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7], |
| 1380 |
r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11], |
| 1381 |
r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15], |
| 1382 |
r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19], |
| 1383 |
r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23], |
| 1384 |
r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27], |
| 1385 |
r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]); |
| 1386 |
printf(str); |
| 1387 |
VideoQuitFullScreen(); |
| 1388 |
|
| 1389 |
#ifdef ENABLE_MON |
| 1390 |
// Start up mon in real-mode |
| 1391 |
printf("Welcome to the sheep factory.\n"); |
| 1392 |
char *arg[4] = {"mon", "-m", "-r", NULL}; |
| 1393 |
mon(3, arg); |
| 1394 |
#endif |
| 1395 |
return NULL; |
| 1396 |
} |
| 1397 |
#endif |
| 1398 |
|
| 1399 |
// Pseudo Mac 1Hz interrupt, update local time |
| 1400 |
if (++tick_counter > 60) { |
| 1401 |
tick_counter = 0; |
| 1402 |
WriteMacInt32(0x20c, TimerDateTime()); |
| 1403 |
} |
| 1404 |
|
| 1405 |
// Trigger 60Hz interrupt |
| 1406 |
if (ReadMacInt32(XLM_IRQ_NEST) == 0) { |
| 1407 |
SetInterruptFlag(INTFLAG_VIA); |
| 1408 |
TriggerInterrupt(); |
| 1409 |
} |
| 1410 |
} |
| 1411 |
|
| 1412 |
uint64 end = GetTicks_usec(); |
| 1413 |
D(bug("%Ld ticks in %Ld usec = %f ticks/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start))); |
| 1414 |
return NULL; |
| 1415 |
} |
| 1416 |
|
| 1417 |
|
| 1418 |
/* |
| 1419 |
* Pthread configuration |
| 1420 |
*/ |
| 1421 |
|
| 1422 |
void Set_pthread_attr(pthread_attr_t *attr, int priority) |
| 1423 |
{ |
| 1424 |
#ifdef HAVE_PTHREADS |
| 1425 |
pthread_attr_init(attr); |
| 1426 |
#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING) |
| 1427 |
// Some of these only work for superuser |
| 1428 |
if (geteuid() == 0) { |
| 1429 |
pthread_attr_setinheritsched(attr, PTHREAD_EXPLICIT_SCHED); |
| 1430 |
pthread_attr_setschedpolicy(attr, SCHED_FIFO); |
| 1431 |
struct sched_param fifo_param; |
| 1432 |
fifo_param.sched_priority = ((sched_get_priority_min(SCHED_FIFO) + |
| 1433 |
sched_get_priority_max(SCHED_FIFO)) / 2 + |
| 1434 |
priority); |
| 1435 |
pthread_attr_setschedparam(attr, &fifo_param); |
| 1436 |
} |
| 1437 |
if (pthread_attr_setscope(attr, PTHREAD_SCOPE_SYSTEM) != 0) { |
| 1438 |
#ifdef PTHREAD_SCOPE_BOUND_NP |
| 1439 |
// If system scope is not available (eg. we're not running |
| 1440 |
// with CAP_SCHED_MGT capability on an SGI box), try bound |
| 1441 |
// scope. It exposes pthread scheduling to the kernel, |
| 1442 |
// without setting realtime priority. |
| 1443 |
pthread_attr_setscope(attr, PTHREAD_SCOPE_BOUND_NP); |
| 1444 |
#endif |
| 1445 |
} |
| 1446 |
#endif |
| 1447 |
#endif |
| 1448 |
} |
| 1449 |
|
| 1450 |
|
| 1451 |
/* |
| 1452 |
* Mutexes |
| 1453 |
*/ |
| 1454 |
|
| 1455 |
#ifdef HAVE_PTHREADS |
| 1456 |
|
| 1457 |
struct B2_mutex { |
| 1458 |
B2_mutex() { |
| 1459 |
pthread_mutexattr_t attr; |
| 1460 |
pthread_mutexattr_init(&attr); |
| 1461 |
// Initialize the mutex for priority inheritance -- |
| 1462 |
// required for accurate timing. |
| 1463 |
#if defined(HAVE_PTHREAD_MUTEXATTR_SETPROTOCOL) && !defined(__CYGWIN__) |
| 1464 |
pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT); |
| 1465 |
#endif |
| 1466 |
#if defined(HAVE_PTHREAD_MUTEXATTR_SETTYPE) && defined(PTHREAD_MUTEX_NORMAL) |
| 1467 |
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL); |
| 1468 |
#endif |
| 1469 |
#ifdef HAVE_PTHREAD_MUTEXATTR_SETPSHARED |
| 1470 |
pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_PRIVATE); |
| 1471 |
#endif |
| 1472 |
pthread_mutex_init(&m, &attr); |
| 1473 |
pthread_mutexattr_destroy(&attr); |
| 1474 |
} |
| 1475 |
~B2_mutex() { |
| 1476 |
pthread_mutex_trylock(&m); // Make sure it's locked before |
| 1477 |
pthread_mutex_unlock(&m); // unlocking it. |
| 1478 |
pthread_mutex_destroy(&m); |
| 1479 |
} |
| 1480 |
pthread_mutex_t m; |
| 1481 |
}; |
| 1482 |
|
| 1483 |
B2_mutex *B2_create_mutex(void) |
| 1484 |
{ |
| 1485 |
return new B2_mutex; |
| 1486 |
} |
| 1487 |
|
| 1488 |
void B2_lock_mutex(B2_mutex *mutex) |
| 1489 |
{ |
| 1490 |
pthread_mutex_lock(&mutex->m); |
| 1491 |
} |
| 1492 |
|
| 1493 |
void B2_unlock_mutex(B2_mutex *mutex) |
| 1494 |
{ |
| 1495 |
pthread_mutex_unlock(&mutex->m); |
| 1496 |
} |
| 1497 |
|
| 1498 |
void B2_delete_mutex(B2_mutex *mutex) |
| 1499 |
{ |
| 1500 |
delete mutex; |
| 1501 |
} |
| 1502 |
|
| 1503 |
#else |
| 1504 |
|
| 1505 |
struct B2_mutex { |
| 1506 |
int dummy; |
| 1507 |
}; |
| 1508 |
|
| 1509 |
B2_mutex *B2_create_mutex(void) |
| 1510 |
{ |
| 1511 |
return new B2_mutex; |
| 1512 |
} |
| 1513 |
|
| 1514 |
void B2_lock_mutex(B2_mutex *mutex) |
| 1515 |
{ |
| 1516 |
} |
| 1517 |
|
| 1518 |
void B2_unlock_mutex(B2_mutex *mutex) |
| 1519 |
{ |
| 1520 |
} |
| 1521 |
|
| 1522 |
void B2_delete_mutex(B2_mutex *mutex) |
| 1523 |
{ |
| 1524 |
delete mutex; |
| 1525 |
} |
| 1526 |
|
| 1527 |
#endif |
| 1528 |
|
| 1529 |
|
| 1530 |
/* |
| 1531 |
* Trigger signal USR2 from another thread |
| 1532 |
*/ |
| 1533 |
|
| 1534 |
#if !EMULATED_PPC |
| 1535 |
void TriggerInterrupt(void) |
| 1536 |
{ |
| 1537 |
if (ready_for_signals) |
| 1538 |
pthread_kill(emul_thread, SIGUSR2); |
| 1539 |
} |
| 1540 |
#endif |
| 1541 |
|
| 1542 |
|
| 1543 |
/* |
| 1544 |
* Interrupt flags (must be handled atomically!) |
| 1545 |
*/ |
| 1546 |
|
| 1547 |
volatile uint32 InterruptFlags = 0; |
| 1548 |
|
| 1549 |
void SetInterruptFlag(uint32 flag) |
| 1550 |
{ |
| 1551 |
atomic_or((int *)&InterruptFlags, flag); |
| 1552 |
} |
| 1553 |
|
| 1554 |
void ClearInterruptFlag(uint32 flag) |
| 1555 |
{ |
| 1556 |
atomic_and((int *)&InterruptFlags, ~flag); |
| 1557 |
} |
| 1558 |
|
| 1559 |
|
| 1560 |
/* |
| 1561 |
* Disable interrupts |
| 1562 |
*/ |
| 1563 |
|
| 1564 |
void DisableInterrupt(void) |
| 1565 |
{ |
| 1566 |
#if EMULATED_PPC |
| 1567 |
WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) + 1); |
| 1568 |
#else |
| 1569 |
atomic_add((int *)XLM_IRQ_NEST, 1); |
| 1570 |
#endif |
| 1571 |
} |
| 1572 |
|
| 1573 |
|
| 1574 |
/* |
| 1575 |
* Enable interrupts |
| 1576 |
*/ |
| 1577 |
|
| 1578 |
void EnableInterrupt(void) |
| 1579 |
{ |
| 1580 |
#if EMULATED_PPC |
| 1581 |
WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) - 1); |
| 1582 |
#else |
| 1583 |
atomic_add((int *)XLM_IRQ_NEST, -1); |
| 1584 |
#endif |
| 1585 |
} |
| 1586 |
|
| 1587 |
|
| 1588 |
/* |
| 1589 |
* USR2 handler |
| 1590 |
*/ |
| 1591 |
|
| 1592 |
#if !EMULATED_PPC |
| 1593 |
static void sigusr2_handler(int sig, siginfo_t *sip, void *scp) |
| 1594 |
{ |
| 1595 |
machine_regs *r = MACHINE_REGISTERS(scp); |
| 1596 |
|
| 1597 |
#ifdef USE_SDL_VIDEO |
| 1598 |
// We must fill in the events queue in the same thread that did call SDL_SetVideoMode() |
| 1599 |
SDL_PumpEvents(); |
| 1600 |
#endif |
| 1601 |
|
| 1602 |
// Do nothing if interrupts are disabled |
| 1603 |
if (*(int32 *)XLM_IRQ_NEST > 0) |
| 1604 |
return; |
| 1605 |
|
| 1606 |
#ifdef SYSTEM_CLOBBERS_R2 |
| 1607 |
// Restore pointer to Thread Local Storage |
| 1608 |
set_r2(TOC); |
| 1609 |
#endif |
| 1610 |
#ifdef SYSTEM_CLOBBERS_R13 |
| 1611 |
// Restore pointer to .sdata section |
| 1612 |
set_r13(R13); |
| 1613 |
#endif |
| 1614 |
|
| 1615 |
// Disable MacOS stack sniffer |
| 1616 |
WriteMacInt32(0x110, 0); |
| 1617 |
|
| 1618 |
// Interrupt action depends on current run mode |
| 1619 |
switch (ReadMacInt32(XLM_RUN_MODE)) { |
| 1620 |
case MODE_68K: |
| 1621 |
// 68k emulator active, trigger 68k interrupt level 1 |
| 1622 |
WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1); |
| 1623 |
r->cr() |= ntohl(kernel_data->v[0x674 >> 2]); |
| 1624 |
break; |
| 1625 |
|
| 1626 |
#if INTERRUPTS_IN_NATIVE_MODE |
| 1627 |
case MODE_NATIVE: |
| 1628 |
// 68k emulator inactive, in nanokernel? |
| 1629 |
if (r->gpr(1) != KernelDataAddr) { |
| 1630 |
|
| 1631 |
// Set extra stack for nested interrupts |
| 1632 |
sig_stack_acquire(); |
| 1633 |
|
| 1634 |
// Prepare for 68k interrupt level 1 |
| 1635 |
WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1); |
| 1636 |
WriteMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc, ReadMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc) | ntohl(kernel_data->v[0x674 >> 2])); |
| 1637 |
|
| 1638 |
// Execute nanokernel interrupt routine (this will activate the 68k emulator) |
| 1639 |
DisableInterrupt(); |
| 1640 |
if (ROMType == ROMTYPE_NEWWORLD) |
| 1641 |
ppc_interrupt(ROM_BASE + 0x312b1c, KernelDataAddr); |
| 1642 |
else |
| 1643 |
ppc_interrupt(ROM_BASE + 0x312a3c, KernelDataAddr); |
| 1644 |
|
| 1645 |
// Reset normal signal stack |
| 1646 |
sig_stack_release(); |
| 1647 |
} |
| 1648 |
break; |
| 1649 |
#endif |
| 1650 |
|
| 1651 |
#if INTERRUPTS_IN_EMUL_OP_MODE |
| 1652 |
case MODE_EMUL_OP: |
| 1653 |
// 68k emulator active, within EMUL_OP routine, execute 68k interrupt routine directly when interrupt level is 0 |
| 1654 |
if ((ReadMacInt32(XLM_68K_R25) & 7) == 0) { |
| 1655 |
|
| 1656 |
// Set extra stack for SIGSEGV handler |
| 1657 |
sig_stack_acquire(); |
| 1658 |
#if 1 |
| 1659 |
// Execute full 68k interrupt routine |
| 1660 |
M68kRegisters r; |
| 1661 |
uint32 old_r25 = ReadMacInt32(XLM_68K_R25); // Save interrupt level |
| 1662 |
WriteMacInt32(XLM_68K_R25, 0x21); // Execute with interrupt level 1 |
| 1663 |
static const uint16 proc[] = { |
| 1664 |
0x3f3c, 0x0000, // move.w #$0000,-(sp) (fake format word) |
| 1665 |
0x487a, 0x000a, // pea @1(pc) (return address) |
| 1666 |
0x40e7, // move sr,-(sp) (saved SR) |
| 1667 |
0x2078, 0x0064, // move.l $64,a0 |
| 1668 |
0x4ed0, // jmp (a0) |
| 1669 |
M68K_RTS // @1 |
| 1670 |
}; |
| 1671 |
Execute68k((uint32)proc, &r); |
| 1672 |
WriteMacInt32(XLM_68K_R25, old_r25); // Restore interrupt level |
| 1673 |
#else |
| 1674 |
// Only update cursor |
| 1675 |
if (HasMacStarted()) { |
| 1676 |
if (InterruptFlags & INTFLAG_VIA) { |
| 1677 |
ClearInterruptFlag(INTFLAG_VIA); |
| 1678 |
ADBInterrupt(); |
| 1679 |
ExecuteNative(NATIVE_VIDEO_VBL); |
| 1680 |
} |
| 1681 |
} |
| 1682 |
#endif |
| 1683 |
// Reset normal signal stack |
| 1684 |
sig_stack_release(); |
| 1685 |
} |
| 1686 |
break; |
| 1687 |
#endif |
| 1688 |
} |
| 1689 |
} |
| 1690 |
#endif |
| 1691 |
|
| 1692 |
|
| 1693 |
/* |
| 1694 |
* SIGSEGV handler |
| 1695 |
*/ |
| 1696 |
|
| 1697 |
#if !EMULATED_PPC |
| 1698 |
static void sigsegv_handler(int sig, siginfo_t *sip, void *scp) |
| 1699 |
{ |
| 1700 |
machine_regs *r = MACHINE_REGISTERS(scp); |
| 1701 |
|
| 1702 |
// Get effective address |
| 1703 |
uint32 addr = r->dar(); |
| 1704 |
|
| 1705 |
#ifdef SYSTEM_CLOBBERS_R2 |
| 1706 |
// Restore pointer to Thread Local Storage |
| 1707 |
set_r2(TOC); |
| 1708 |
#endif |
| 1709 |
#ifdef SYSTEM_CLOBBERS_R13 |
| 1710 |
// Restore pointer to .sdata section |
| 1711 |
set_r13(R13); |
| 1712 |
#endif |
| 1713 |
|
| 1714 |
#if ENABLE_VOSF |
| 1715 |
// Handle screen fault. |
| 1716 |
extern bool Screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction); |
| 1717 |
if (Screen_fault_handler((sigsegv_address_t)addr, (sigsegv_address_t)r->pc())) |
| 1718 |
return; |
| 1719 |
#endif |
| 1720 |
|
| 1721 |
num_segv++; |
| 1722 |
|
| 1723 |
// Fault in Mac ROM or RAM or DR Cache? |
| 1724 |
bool mac_fault = (r->pc() >= ROM_BASE) && (r->pc() < (ROM_BASE + ROM_AREA_SIZE)) || (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize)) || (r->pc() >= DR_CACHE_BASE && r->pc() < (DR_CACHE_BASE + DR_CACHE_SIZE)); |
| 1725 |
if (mac_fault) { |
| 1726 |
|
| 1727 |
// "VM settings" during MacOS 8 installation |
| 1728 |
if (r->pc() == ROM_BASE + 0x488160 && r->gpr(20) == 0xf8000000) { |
| 1729 |
r->pc() += 4; |
| 1730 |
r->gpr(8) = 0; |
| 1731 |
return; |
| 1732 |
|
| 1733 |
// MacOS 8.5 installation |
| 1734 |
} else if (r->pc() == ROM_BASE + 0x488140 && r->gpr(16) == 0xf8000000) { |
| 1735 |
r->pc() += 4; |
| 1736 |
r->gpr(8) = 0; |
| 1737 |
return; |
| 1738 |
|
| 1739 |
// MacOS 8 serial drivers on startup |
| 1740 |
} else if (r->pc() == ROM_BASE + 0x48e080 && (r->gpr(8) == 0xf3012002 || r->gpr(8) == 0xf3012000)) { |
| 1741 |
r->pc() += 4; |
| 1742 |
r->gpr(8) = 0; |
| 1743 |
return; |
| 1744 |
|
| 1745 |
// MacOS 8.1 serial drivers on startup |
| 1746 |
} else if (r->pc() == ROM_BASE + 0x48c5e0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) { |
| 1747 |
r->pc() += 4; |
| 1748 |
return; |
| 1749 |
} else if (r->pc() == ROM_BASE + 0x4a10a0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) { |
| 1750 |
r->pc() += 4; |
| 1751 |
return; |
| 1752 |
|
| 1753 |
// MacOS 8.6 serial drivers on startup (with DR Cache and OldWorld ROM) |
| 1754 |
} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(16) == 0xf3012002 || r->gpr(16) == 0xf3012000)) { |
| 1755 |
r->pc() += 4; |
| 1756 |
return; |
| 1757 |
} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) { |
| 1758 |
r->pc() += 4; |
| 1759 |
return; |
| 1760 |
} |
| 1761 |
|
| 1762 |
// Get opcode and divide into fields |
| 1763 |
uint32 opcode = *((uint32 *)r->pc()); |
| 1764 |
uint32 primop = opcode >> 26; |
| 1765 |
uint32 exop = (opcode >> 1) & 0x3ff; |
| 1766 |
uint32 ra = (opcode >> 16) & 0x1f; |
| 1767 |
uint32 rb = (opcode >> 11) & 0x1f; |
| 1768 |
uint32 rd = (opcode >> 21) & 0x1f; |
| 1769 |
int32 imm = (int16)(opcode & 0xffff); |
| 1770 |
|
| 1771 |
// Analyze opcode |
| 1772 |
enum { |
| 1773 |
TYPE_UNKNOWN, |
| 1774 |
TYPE_LOAD, |
| 1775 |
TYPE_STORE |
| 1776 |
} transfer_type = TYPE_UNKNOWN; |
| 1777 |
enum { |
| 1778 |
SIZE_UNKNOWN, |
| 1779 |
SIZE_BYTE, |
| 1780 |
SIZE_HALFWORD, |
| 1781 |
SIZE_WORD |
| 1782 |
} transfer_size = SIZE_UNKNOWN; |
| 1783 |
enum { |
| 1784 |
MODE_UNKNOWN, |
| 1785 |
MODE_NORM, |
| 1786 |
MODE_U, |
| 1787 |
MODE_X, |
| 1788 |
MODE_UX |
| 1789 |
} addr_mode = MODE_UNKNOWN; |
| 1790 |
switch (primop) { |
| 1791 |
case 31: |
| 1792 |
switch (exop) { |
| 1793 |
case 23: // lwzx |
| 1794 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_X; break; |
| 1795 |
case 55: // lwzux |
| 1796 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_UX; break; |
| 1797 |
case 87: // lbzx |
| 1798 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_X; break; |
| 1799 |
case 119: // lbzux |
| 1800 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_UX; break; |
| 1801 |
case 151: // stwx |
| 1802 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_X; break; |
| 1803 |
case 183: // stwux |
| 1804 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_UX; break; |
| 1805 |
case 215: // stbx |
| 1806 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_X; break; |
| 1807 |
case 247: // stbux |
| 1808 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_UX; break; |
| 1809 |
case 279: // lhzx |
| 1810 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
| 1811 |
case 311: // lhzux |
| 1812 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
| 1813 |
case 343: // lhax |
| 1814 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
| 1815 |
case 375: // lhaux |
| 1816 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
| 1817 |
case 407: // sthx |
| 1818 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
| 1819 |
case 439: // sthux |
| 1820 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
| 1821 |
} |
| 1822 |
break; |
| 1823 |
|
| 1824 |
case 32: // lwz |
| 1825 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break; |
| 1826 |
case 33: // lwzu |
| 1827 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_U; break; |
| 1828 |
case 34: // lbz |
| 1829 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_NORM; break; |
| 1830 |
case 35: // lbzu |
| 1831 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_U; break; |
| 1832 |
case 36: // stw |
| 1833 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break; |
| 1834 |
case 37: // stwu |
| 1835 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_U; break; |
| 1836 |
case 38: // stb |
| 1837 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_NORM; break; |
| 1838 |
case 39: // stbu |
| 1839 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_U; break; |
| 1840 |
case 40: // lhz |
| 1841 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
| 1842 |
case 41: // lhzu |
| 1843 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
| 1844 |
case 42: // lha |
| 1845 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
| 1846 |
case 43: // lhau |
| 1847 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
| 1848 |
case 44: // sth |
| 1849 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
| 1850 |
case 45: // sthu |
| 1851 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
| 1852 |
#if EMULATE_UNALIGNED_LOADSTORE_MULTIPLE |
| 1853 |
case 46: // lmw |
| 1854 |
if ((addr % 4) != 0) { |
| 1855 |
uint32 ea = addr; |
| 1856 |
D(bug("WARNING: unaligned lmw to EA=%08x from IP=%08x\n", ea, r->pc())); |
| 1857 |
for (int i = rd; i <= 31; i++) { |
| 1858 |
r->gpr(i) = ReadMacInt32(ea); |
| 1859 |
ea += 4; |
| 1860 |
} |
| 1861 |
r->pc() += 4; |
| 1862 |
goto rti; |
| 1863 |
} |
| 1864 |
break; |
| 1865 |
case 47: // stmw |
| 1866 |
if ((addr % 4) != 0) { |
| 1867 |
uint32 ea = addr; |
| 1868 |
D(bug("WARNING: unaligned stmw to EA=%08x from IP=%08x\n", ea, r->pc())); |
| 1869 |
for (int i = rd; i <= 31; i++) { |
| 1870 |
WriteMacInt32(ea, r->gpr(i)); |
| 1871 |
ea += 4; |
| 1872 |
} |
| 1873 |
r->pc() += 4; |
| 1874 |
goto rti; |
| 1875 |
} |
| 1876 |
break; |
| 1877 |
#endif |
| 1878 |
} |
| 1879 |
|
| 1880 |
// Ignore ROM writes (including to the zero page, which is read-only) |
| 1881 |
if (transfer_type == TYPE_STORE && |
| 1882 |
((addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) || |
| 1883 |
(addr >= SheepMem::ZeroPage() && addr < SheepMem::ZeroPage() + SheepMem::PageSize()))) { |
| 1884 |
// D(bug("WARNING: %s write access to ROM at %08lx, pc %08lx\n", transfer_size == SIZE_BYTE ? "Byte" : transfer_size == SIZE_HALFWORD ? "Halfword" : "Word", addr, r->pc())); |
| 1885 |
if (addr_mode == MODE_U || addr_mode == MODE_UX) |
| 1886 |
r->gpr(ra) = addr; |
| 1887 |
r->pc() += 4; |
| 1888 |
goto rti; |
| 1889 |
} |
| 1890 |
|
| 1891 |
// Ignore illegal memory accesses? |
| 1892 |
if (PrefsFindBool("ignoresegv")) { |
| 1893 |
if (addr_mode == MODE_U || addr_mode == MODE_UX) |
| 1894 |
r->gpr(ra) = addr; |
| 1895 |
if (transfer_type == TYPE_LOAD) |
| 1896 |
r->gpr(rd) = 0; |
| 1897 |
r->pc() += 4; |
| 1898 |
goto rti; |
| 1899 |
} |
| 1900 |
|
| 1901 |
// In GUI mode, show error alert |
| 1902 |
if (!PrefsFindBool("nogui")) { |
| 1903 |
char str[256]; |
| 1904 |
if (transfer_type == TYPE_LOAD || transfer_type == TYPE_STORE) |
| 1905 |
sprintf(str, GetString(STR_MEM_ACCESS_ERR), transfer_size == SIZE_BYTE ? "byte" : transfer_size == SIZE_HALFWORD ? "halfword" : "word", transfer_type == TYPE_LOAD ? GetString(STR_MEM_ACCESS_READ) : GetString(STR_MEM_ACCESS_WRITE), addr, r->pc(), r->gpr(24), r->gpr(1)); |
| 1906 |
else |
| 1907 |
sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode); |
| 1908 |
ErrorAlert(str); |
| 1909 |
QuitEmulator(); |
| 1910 |
return; |
| 1911 |
} |
| 1912 |
} |
| 1913 |
|
| 1914 |
// For all other errors, jump into debugger (sort of...) |
| 1915 |
crash_reason = (sig == SIGBUS) ? "SIGBUS" : "SIGSEGV"; |
| 1916 |
if (!ready_for_signals) { |
| 1917 |
printf("%s\n"); |
| 1918 |
printf(" sigcontext %p, machine_regs %p\n", scp, r); |
| 1919 |
printf( |
| 1920 |
" pc %08lx lr %08lx ctr %08lx msr %08lx\n" |
| 1921 |
" xer %08lx cr %08lx \n" |
| 1922 |
" r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n" |
| 1923 |
" r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n" |
| 1924 |
" r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n" |
| 1925 |
" r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n" |
| 1926 |
" r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n" |
| 1927 |
" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n" |
| 1928 |
" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n" |
| 1929 |
" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n", |
| 1930 |
crash_reason, |
| 1931 |
r->pc(), r->lr(), r->ctr(), r->msr(), |
| 1932 |
r->xer(), r->cr(), |
| 1933 |
r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3), |
| 1934 |
r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7), |
| 1935 |
r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11), |
| 1936 |
r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15), |
| 1937 |
r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19), |
| 1938 |
r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23), |
| 1939 |
r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27), |
| 1940 |
r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31)); |
| 1941 |
exit(1); |
| 1942 |
QuitEmulator(); |
| 1943 |
return; |
| 1944 |
} else { |
| 1945 |
// We crashed. Save registers, tell tick thread and loop forever |
| 1946 |
build_sigregs(&sigsegv_regs, r); |
| 1947 |
emul_thread_fatal = true; |
| 1948 |
for (;;) ; |
| 1949 |
} |
| 1950 |
rti:; |
| 1951 |
} |
| 1952 |
|
| 1953 |
|
| 1954 |
/* |
| 1955 |
* SIGILL handler |
| 1956 |
*/ |
| 1957 |
|
| 1958 |
static void sigill_handler(int sig, siginfo_t *sip, void *scp) |
| 1959 |
{ |
| 1960 |
machine_regs *r = MACHINE_REGISTERS(scp); |
| 1961 |
char str[256]; |
| 1962 |
|
| 1963 |
#ifdef SYSTEM_CLOBBERS_R2 |
| 1964 |
// Restore pointer to Thread Local Storage |
| 1965 |
set_r2(TOC); |
| 1966 |
#endif |
| 1967 |
#ifdef SYSTEM_CLOBBERS_R13 |
| 1968 |
// Restore pointer to .sdata section |
| 1969 |
set_r13(R13); |
| 1970 |
#endif |
| 1971 |
|
| 1972 |
// Fault in Mac ROM or RAM? |
| 1973 |
bool mac_fault = (r->pc() >= ROM_BASE) && (r->pc() < (ROM_BASE + ROM_AREA_SIZE)) || (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize)); |
| 1974 |
if (mac_fault) { |
| 1975 |
|
| 1976 |
// Get opcode and divide into fields |
| 1977 |
uint32 opcode = *((uint32 *)r->pc()); |
| 1978 |
uint32 primop = opcode >> 26; |
| 1979 |
uint32 exop = (opcode >> 1) & 0x3ff; |
| 1980 |
uint32 ra = (opcode >> 16) & 0x1f; |
| 1981 |
uint32 rb = (opcode >> 11) & 0x1f; |
| 1982 |
uint32 rd = (opcode >> 21) & 0x1f; |
| 1983 |
int32 imm = (int16)(opcode & 0xffff); |
| 1984 |
|
| 1985 |
switch (primop) { |
| 1986 |
case 9: // POWER instructions |
| 1987 |
case 22: |
| 1988 |
power_inst: sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->pc(), r->gpr(1), opcode); |
| 1989 |
ErrorAlert(str); |
| 1990 |
QuitEmulator(); |
| 1991 |
return; |
| 1992 |
|
| 1993 |
case 31: |
| 1994 |
switch (exop) { |
| 1995 |
case 83: // mfmsr |
| 1996 |
r->gpr(rd) = 0xf072; |
| 1997 |
r->pc() += 4; |
| 1998 |
goto rti; |
| 1999 |
|
| 2000 |
case 210: // mtsr |
| 2001 |
case 242: // mtsrin |
| 2002 |
case 306: // tlbie |
| 2003 |
r->pc() += 4; |
| 2004 |
goto rti; |
| 2005 |
|
| 2006 |
case 339: { // mfspr |
| 2007 |
int spr = ra | (rb << 5); |
| 2008 |
switch (spr) { |
| 2009 |
case 0: // MQ |
| 2010 |
case 22: // DEC |
| 2011 |
case 952: // MMCR0 |
| 2012 |
case 953: // PMC1 |
| 2013 |
case 954: // PMC2 |
| 2014 |
case 955: // SIA |
| 2015 |
case 956: // MMCR1 |
| 2016 |
case 957: // PMC3 |
| 2017 |
case 958: // PMC4 |
| 2018 |
case 959: // SDA |
| 2019 |
r->pc() += 4; |
| 2020 |
goto rti; |
| 2021 |
case 25: // SDR1 |
| 2022 |
r->gpr(rd) = 0xdead001f; |
| 2023 |
r->pc() += 4; |
| 2024 |
goto rti; |
| 2025 |
case 287: // PVR |
| 2026 |
r->gpr(rd) = PVR; |
| 2027 |
r->pc() += 4; |
| 2028 |
goto rti; |
| 2029 |
} |
| 2030 |
break; |
| 2031 |
} |
| 2032 |
|
| 2033 |
case 467: { // mtspr |
| 2034 |
int spr = ra | (rb << 5); |
| 2035 |
switch (spr) { |
| 2036 |
case 0: // MQ |
| 2037 |
case 22: // DEC |
| 2038 |
case 275: // SPRG3 |
| 2039 |
case 528: // IBAT0U |
| 2040 |
case 529: // IBAT0L |
| 2041 |
case 530: // IBAT1U |
| 2042 |
case 531: // IBAT1L |
| 2043 |
case 532: // IBAT2U |
| 2044 |
case 533: // IBAT2L |
| 2045 |
case 534: // IBAT3U |
| 2046 |
case 535: // IBAT3L |
| 2047 |
case 536: // DBAT0U |
| 2048 |
case 537: // DBAT0L |
| 2049 |
case 538: // DBAT1U |
| 2050 |
case 539: // DBAT1L |
| 2051 |
case 540: // DBAT2U |
| 2052 |
case 541: // DBAT2L |
| 2053 |
case 542: // DBAT3U |
| 2054 |
case 543: // DBAT3L |
| 2055 |
case 952: // MMCR0 |
| 2056 |
case 953: // PMC1 |
| 2057 |
case 954: // PMC2 |
| 2058 |
case 955: // SIA |
| 2059 |
case 956: // MMCR1 |
| 2060 |
case 957: // PMC3 |
| 2061 |
case 958: // PMC4 |
| 2062 |
case 959: // SDA |
| 2063 |
r->pc() += 4; |
| 2064 |
goto rti; |
| 2065 |
} |
| 2066 |
break; |
| 2067 |
} |
| 2068 |
|
| 2069 |
case 29: case 107: case 152: case 153: // POWER instructions |
| 2070 |
case 184: case 216: case 217: case 248: |
| 2071 |
case 264: case 277: case 331: case 360: |
| 2072 |
case 363: case 488: case 531: case 537: |
| 2073 |
case 541: case 664: case 665: case 696: |
| 2074 |
case 728: case 729: case 760: case 920: |
| 2075 |
case 921: case 952: |
| 2076 |
goto power_inst; |
| 2077 |
} |
| 2078 |
} |
| 2079 |
|
| 2080 |
// In GUI mode, show error alert |
| 2081 |
if (!PrefsFindBool("nogui")) { |
| 2082 |
sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode); |
| 2083 |
ErrorAlert(str); |
| 2084 |
QuitEmulator(); |
| 2085 |
return; |
| 2086 |
} |
| 2087 |
} |
| 2088 |
|
| 2089 |
// For all other errors, jump into debugger (sort of...) |
| 2090 |
crash_reason = "SIGILL"; |
| 2091 |
if (!ready_for_signals) { |
| 2092 |
printf("%s\n"); |
| 2093 |
printf(" sigcontext %p, machine_regs %p\n", scp, r); |
| 2094 |
printf( |
| 2095 |
" pc %08lx lr %08lx ctr %08lx msr %08lx\n" |
| 2096 |
" xer %08lx cr %08lx \n" |
| 2097 |
" r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n" |
| 2098 |
" r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n" |
| 2099 |
" r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n" |
| 2100 |
" r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n" |
| 2101 |
" r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n" |
| 2102 |
" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n" |
| 2103 |
" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n" |
| 2104 |
" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n", |
| 2105 |
crash_reason, |
| 2106 |
r->pc(), r->lr(), r->ctr(), r->msr(), |
| 2107 |
r->xer(), r->cr(), |
| 2108 |
r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3), |
| 2109 |
r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7), |
| 2110 |
r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11), |
| 2111 |
r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15), |
| 2112 |
r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19), |
| 2113 |
r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23), |
| 2114 |
r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27), |
| 2115 |
r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31)); |
| 2116 |
exit(1); |
| 2117 |
QuitEmulator(); |
| 2118 |
return; |
| 2119 |
} else { |
| 2120 |
// We crashed. Save registers, tell tick thread and loop forever |
| 2121 |
build_sigregs(&sigsegv_regs, r); |
| 2122 |
emul_thread_fatal = true; |
| 2123 |
for (;;) ; |
| 2124 |
} |
| 2125 |
rti:; |
| 2126 |
} |
| 2127 |
#endif |
| 2128 |
|
| 2129 |
|
| 2130 |
/* |
| 2131 |
* Helpers to share 32-bit addressable data with MacOS |
| 2132 |
*/ |
| 2133 |
|
| 2134 |
bool SheepMem::Init(void) |
| 2135 |
{ |
| 2136 |
// Size of a native page |
| 2137 |
page_size = getpagesize(); |
| 2138 |
|
| 2139 |
// Allocate SheepShaver globals |
| 2140 |
proc = base; |
| 2141 |
if (vm_mac_acquire(base, size) < 0) |
| 2142 |
return false; |
| 2143 |
|
| 2144 |
// Allocate page with all bits set to 0, right in the middle |
| 2145 |
// This is also used to catch undesired overlaps between proc and data areas |
| 2146 |
zero_page = proc + (size / 2); |
| 2147 |
Mac_memset(zero_page, 0, page_size); |
| 2148 |
if (vm_protect(Mac2HostAddr(zero_page), page_size, VM_PAGE_READ) < 0) |
| 2149 |
return false; |
| 2150 |
|
| 2151 |
#if EMULATED_PPC |
| 2152 |
// Allocate alternate stack for PowerPC interrupt routine |
| 2153 |
sig_stack = base + size; |
| 2154 |
if (vm_mac_acquire(sig_stack, SIG_STACK_SIZE) < 0) |
| 2155 |
return false; |
| 2156 |
#endif |
| 2157 |
|
| 2158 |
data = base + size; |
| 2159 |
return true; |
| 2160 |
} |
| 2161 |
|
| 2162 |
void SheepMem::Exit(void) |
| 2163 |
{ |
| 2164 |
if (data) { |
| 2165 |
// Delete SheepShaver globals |
| 2166 |
vm_mac_release(base, size); |
| 2167 |
|
| 2168 |
#if EMULATED_PPC |
| 2169 |
// Delete alternate stack for PowerPC interrupt routine |
| 2170 |
vm_mac_release(sig_stack, SIG_STACK_SIZE); |
| 2171 |
#endif |
| 2172 |
} |
| 2173 |
} |
| 2174 |
|
| 2175 |
|
| 2176 |
/* |
| 2177 |
* Display alert |
| 2178 |
*/ |
| 2179 |
|
| 2180 |
#ifdef ENABLE_GTK |
| 2181 |
static void dl_destroyed(void) |
| 2182 |
{ |
| 2183 |
gtk_main_quit(); |
| 2184 |
} |
| 2185 |
|
| 2186 |
static void dl_quit(GtkWidget *dialog) |
| 2187 |
{ |
| 2188 |
gtk_widget_destroy(dialog); |
| 2189 |
} |
| 2190 |
|
| 2191 |
void display_alert(int title_id, int prefix_id, int button_id, const char *text) |
| 2192 |
{ |
| 2193 |
char str[256]; |
| 2194 |
sprintf(str, GetString(prefix_id), text); |
| 2195 |
|
| 2196 |
GtkWidget *dialog = gtk_dialog_new(); |
| 2197 |
gtk_window_set_title(GTK_WINDOW(dialog), GetString(title_id)); |
| 2198 |
gtk_container_border_width(GTK_CONTAINER(dialog), 5); |
| 2199 |
gtk_widget_set_uposition(GTK_WIDGET(dialog), 100, 150); |
| 2200 |
gtk_signal_connect(GTK_OBJECT(dialog), "destroy", GTK_SIGNAL_FUNC(dl_destroyed), NULL); |
| 2201 |
|
| 2202 |
GtkWidget *label = gtk_label_new(str); |
| 2203 |
gtk_widget_show(label); |
| 2204 |
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), label, TRUE, TRUE, 0); |
| 2205 |
|
| 2206 |
GtkWidget *button = gtk_button_new_with_label(GetString(button_id)); |
| 2207 |
gtk_widget_show(button); |
| 2208 |
gtk_signal_connect_object(GTK_OBJECT(button), "clicked", GTK_SIGNAL_FUNC(dl_quit), GTK_OBJECT(dialog)); |
| 2209 |
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->action_area), button, FALSE, FALSE, 0); |
| 2210 |
GTK_WIDGET_SET_FLAGS(button, GTK_CAN_DEFAULT); |
| 2211 |
gtk_widget_grab_default(button); |
| 2212 |
gtk_widget_show(dialog); |
| 2213 |
|
| 2214 |
gtk_main(); |
| 2215 |
} |
| 2216 |
#endif |
| 2217 |
|
| 2218 |
|
| 2219 |
/* |
| 2220 |
* Display error alert |
| 2221 |
*/ |
| 2222 |
|
| 2223 |
void ErrorAlert(const char *text) |
| 2224 |
{ |
| 2225 |
#if defined(ENABLE_GTK) && !defined(USE_SDL_VIDEO) |
| 2226 |
if (PrefsFindBool("nogui") || x_display == NULL) { |
| 2227 |
printf(GetString(STR_SHELL_ERROR_PREFIX), text); |
| 2228 |
return; |
| 2229 |
} |
| 2230 |
VideoQuitFullScreen(); |
| 2231 |
display_alert(STR_ERROR_ALERT_TITLE, STR_GUI_ERROR_PREFIX, STR_QUIT_BUTTON, text); |
| 2232 |
#else |
| 2233 |
printf(GetString(STR_SHELL_ERROR_PREFIX), text); |
| 2234 |
#endif |
| 2235 |
} |
| 2236 |
|
| 2237 |
|
| 2238 |
/* |
| 2239 |
* Display warning alert |
| 2240 |
*/ |
| 2241 |
|
| 2242 |
void WarningAlert(const char *text) |
| 2243 |
{ |
| 2244 |
#if defined(ENABLE_GTK) && !defined(USE_SDL_VIDEO) |
| 2245 |
if (PrefsFindBool("nogui") || x_display == NULL) { |
| 2246 |
printf(GetString(STR_SHELL_WARNING_PREFIX), text); |
| 2247 |
return; |
| 2248 |
} |
| 2249 |
display_alert(STR_WARNING_ALERT_TITLE, STR_GUI_WARNING_PREFIX, STR_OK_BUTTON, text); |
| 2250 |
#else |
| 2251 |
printf(GetString(STR_SHELL_WARNING_PREFIX), text); |
| 2252 |
#endif |
| 2253 |
} |
| 2254 |
|
| 2255 |
|
| 2256 |
/* |
| 2257 |
* Display choice alert |
| 2258 |
*/ |
| 2259 |
|
| 2260 |
bool ChoiceAlert(const char *text, const char *pos, const char *neg) |
| 2261 |
{ |
| 2262 |
printf(GetString(STR_SHELL_WARNING_PREFIX), text); |
| 2263 |
return false; //!! |
| 2264 |
} |
