mirror of
https://github.com/kanjitalk755/macemu.git
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663facbf97
in that case. Tell me if I broke other arches, e.g. r13 is no longer saved in Video and Ethernet stubs, though it seems to be OK. Colateral feature: SheepShaver should now run on Linux/ppc64 with relevant 32-bit runtime. Native Linux/ppc64 support is harder as low mem globals are 32-bit in mind and e.g. the TLS register there is %r13, %r2 is the TOC (PowerOpen/AIX ABI)
2281 lines
61 KiB
C++
2281 lines
61 KiB
C++
/*
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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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* 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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#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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#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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#define DEBUG 0
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#include "debug.h"
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#ifdef HAVE_DIRENT_H
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#include <dirent.h>
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#endif
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#ifdef USE_SDL
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#include <SDL.h>
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#endif
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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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#ifdef ENABLE_GTK
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#include <gtk/gtk.h>
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#endif
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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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#ifdef ENABLE_MON
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#include "mon.h"
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#endif
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// Enable emulation of unaligned lmw/stmw?
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#define EMULATE_UNALIGNED_LOADSTORE_MULTIPLE 1
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// Enable Execute68k() safety checks?
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#define SAFE_EXEC_68K 0
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// Interrupts in EMUL_OP mode?
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#define INTERRUPTS_IN_EMUL_OP_MODE 1
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// Interrupts in native mode?
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#define INTERRUPTS_IN_NATIVE_MODE 1
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// Number of alternate stacks for signal handlers?
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#define SIG_STACK_COUNT 4
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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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#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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#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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#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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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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#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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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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#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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#include <sys/ucontext.h>
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#define MACHINE_REGISTERS(scp) ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext))
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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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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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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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static inline void 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;
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}
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sigaltstack(&sig_stacks[sig_stack_id], NULL);
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}
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static inline void 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;
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}
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sigaltstack(&sig_stacks[sig_stack_id], NULL);
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}
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#endif
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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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// 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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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;
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static uint8 last_xpram[XPRAM_SIZE]; // Buffer for monitoring XPRAM changes
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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
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static pthread_t nvram_thread; // NVRAM watchdog
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static bool tick_thread_active = false; // Flag: MacOS thread installed
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static volatile bool tick_thread_cancel; // Flag: Cancel 60Hz thread
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static pthread_t tick_thread; // 60Hz thread
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static pthread_t emul_thread; // MacOS thread
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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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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
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#else
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static struct sigaction sigsegv_action; // Data access exception signal (of emulator thread)
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static struct sigaction sigill_action; // Illegal instruction signal (of emulator thread)
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static bool emul_thread_fatal = false; // Flag: MacOS thread crashed, tick thread shall dump debug output
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static sigregs sigsegv_regs; // Register dump when crashed
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static const char *crash_reason = NULL; // Reason of the crash (SIGSEGV, SIGBUS, SIGILL)
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#endif
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uint32 SheepMem::page_size; // Size of a native page
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uintptr SheepMem::zero_page = 0; // Address of ro page filled in with zeros
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uintptr SheepMem::base = 0x60000000; // Address of SheepShaver data
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uintptr SheepMem::proc; // Bottom address of SheepShave procedures
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uintptr SheepMem::data; // Top of SheepShaver data (stack like storage)
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// Prototypes
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static bool kernel_data_init(void);
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static void kernel_data_exit(void);
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static void Quit(void);
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static void *emul_func(void *arg);
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static void *nvram_func(void *arg);
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static void *tick_func(void *arg);
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#if EMULATED_PPC
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extern void emul_ppc(uint32 start);
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extern void init_emul_ppc(void);
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extern void exit_emul_ppc(void);
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sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
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#else
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static void sigusr2_handler(int sig, siginfo_t *sip, void *scp);
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static void sigsegv_handler(int sig, siginfo_t *sip, void *scp);
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static void sigill_handler(int sig, siginfo_t *sip, void *scp);
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#endif
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// From asm_linux.S
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#if !EMULATED_PPC
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extern "C" void *get_sp(void);
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extern "C" void *get_r2(void);
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extern "C" void set_r2(void *);
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extern "C" void *get_r13(void);
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extern "C" void set_r13(void *);
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extern "C" void flush_icache_range(uint32 start, uint32 end);
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extern "C" void jump_to_rom(uint32 entry, uint32 context);
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extern "C" void quit_emulator(void);
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extern "C" void execute_68k(uint32 pc, M68kRegisters *r);
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extern "C" void ppc_interrupt(uint32 entry, uint32 kernel_data);
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extern "C" int atomic_add(int *var, int v);
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extern "C" int atomic_and(int *var, int v);
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extern "C" int atomic_or(int *var, int v);
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extern void paranoia_check(void);
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#endif
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#if EMULATED_PPC
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/*
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* Return signal stack base
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*/
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uintptr SignalStackBase(void)
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{
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return sig_stack + SIG_STACK_SIZE;
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}
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/*
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* Atomic operations
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*/
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#if HAVE_SPINLOCKS
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static spinlock_t atomic_ops_lock = SPIN_LOCK_UNLOCKED;
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#else
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#define spin_lock(LOCK)
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#define spin_unlock(LOCK)
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#endif
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int atomic_add(int *var, int v)
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{
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spin_lock(&atomic_ops_lock);
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int ret = *var;
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*var += v;
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spin_unlock(&atomic_ops_lock);
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return ret;
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}
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int atomic_and(int *var, int v)
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{
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spin_lock(&atomic_ops_lock);
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int ret = *var;
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*var &= v;
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spin_unlock(&atomic_ops_lock);
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return ret;
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}
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int atomic_or(int *var, int v)
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{
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spin_lock(&atomic_ops_lock);
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int ret = *var;
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*var |= v;
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spin_unlock(&atomic_ops_lock);
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return ret;
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}
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#endif
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/*
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* Memory management helpers
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|
*/
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static inline int vm_mac_acquire(uint32 addr, uint32 size)
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{
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return vm_acquire_fixed(Mac2HostAddr(addr), size);
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}
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static inline int vm_mac_release(uint32 addr, uint32 size)
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{
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return vm_release(Mac2HostAddr(addr), size);
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}
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|
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/*
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* Main program
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|
*/
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static void usage(const char *prg_name)
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{
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printf("Usage: %s [OPTION...]\n", prg_name);
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|
printf("\nUnix options:\n");
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printf(" --display STRING\n X display to use\n");
|
|
PrefsPrintUsage();
|
|
exit(0);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
char str[256];
|
|
int rom_fd;
|
|
FILE *proc_file;
|
|
const char *rom_path;
|
|
uint32 rom_size, actual;
|
|
uint8 *rom_tmp;
|
|
time_t now, expire;
|
|
|
|
// Initialize variables
|
|
RAMBase = 0;
|
|
tzset();
|
|
|
|
// Print some info
|
|
printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR);
|
|
printf(" %s\n", GetString(STR_ABOUT_TEXT2));
|
|
|
|
#if !EMULATED_PPC
|
|
#ifdef SYSTEM_CLOBBERS_R2
|
|
// Get TOC pointer
|
|
TOC = get_r2();
|
|
#endif
|
|
#ifdef SYSTEM_CLOBBERS_R13
|
|
// Get r13 register
|
|
R13 = get_r13();
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef ENABLE_GTK
|
|
// Init GTK
|
|
gtk_set_locale();
|
|
gtk_init(&argc, &argv);
|
|
#endif
|
|
|
|
// Read preferences
|
|
PrefsInit(argc, argv);
|
|
|
|
// Parse command line arguments
|
|
for (int i=1; i<argc; i++) {
|
|
if (strcmp(argv[i], "--help") == 0) {
|
|
usage(argv[0]);
|
|
#ifndef USE_SDL_VIDEO
|
|
} else if (strcmp(argv[i], "--display") == 0) {
|
|
i++;
|
|
if (i < argc)
|
|
x_display_name = strdup(argv[i]);
|
|
#endif
|
|
} else if (argv[i][0] == '-') {
|
|
fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
|
|
usage(argv[0]);
|
|
}
|
|
}
|
|
|
|
#ifdef USE_SDL
|
|
// Initialize SDL system
|
|
int sdl_flags = 0;
|
|
#ifdef USE_SDL_VIDEO
|
|
sdl_flags |= SDL_INIT_VIDEO;
|
|
#endif
|
|
#ifdef USE_SDL_AUDIO
|
|
sdl_flags |= SDL_INIT_AUDIO;
|
|
#endif
|
|
assert(sdl_flags != 0);
|
|
if (SDL_Init(sdl_flags) == -1) {
|
|
char str[256];
|
|
sprintf(str, "Could not initialize SDL: %s.\n", SDL_GetError());
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
atexit(SDL_Quit);
|
|
#endif
|
|
|
|
#ifndef USE_SDL_VIDEO
|
|
// Open display
|
|
x_display = XOpenDisplay(x_display_name);
|
|
if (x_display == NULL) {
|
|
char str[256];
|
|
sprintf(str, GetString(STR_NO_XSERVER_ERR), XDisplayName(x_display_name));
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
|
|
#if defined(ENABLE_XF86_DGA) && !defined(ENABLE_MON)
|
|
// Fork out, so we can return from fullscreen mode when things get ugly
|
|
XF86DGAForkApp(DefaultScreen(x_display));
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef ENABLE_MON
|
|
// Initialize mon
|
|
mon_init();
|
|
#endif
|
|
|
|
#if !EMULATED_PPC
|
|
// Create and install stacks for signal handlers
|
|
for (int i = 0; i < SIG_STACK_COUNT; i++) {
|
|
void *sig_stack = malloc(SIG_STACK_SIZE);
|
|
D(bug("Signal stack %d at %p\n", i, sig_stack));
|
|
if (sig_stack == NULL) {
|
|
ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
|
|
goto quit;
|
|
}
|
|
sig_stacks[i].ss_sp = sig_stack;
|
|
sig_stacks[i].ss_flags = 0;
|
|
sig_stacks[i].ss_size = SIG_STACK_SIZE;
|
|
}
|
|
sig_stack_id = 0;
|
|
if (sigaltstack(&sig_stacks[0], NULL) < 0) {
|
|
sprintf(str, GetString(STR_SIGALTSTACK_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
#endif
|
|
|
|
#if !EMULATED_PPC
|
|
// Install SIGSEGV and SIGBUS handlers
|
|
sigemptyset(&sigsegv_action.sa_mask); // Block interrupts during SEGV handling
|
|
sigaddset(&sigsegv_action.sa_mask, SIGUSR2);
|
|
sigsegv_action.sa_sigaction = sigsegv_handler;
|
|
sigsegv_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
|
|
#ifdef HAVE_SIGNAL_SA_RESTORER
|
|
sigsegv_action.sa_restorer = NULL;
|
|
#endif
|
|
if (sigaction(SIGSEGV, &sigsegv_action, NULL) < 0) {
|
|
sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
if (sigaction(SIGBUS, &sigsegv_action, NULL) < 0) {
|
|
sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
#else
|
|
// Install SIGSEGV handler for CPU emulator
|
|
if (!sigsegv_install_handler(sigsegv_handler)) {
|
|
sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
#endif
|
|
|
|
// Initialize VM system
|
|
vm_init();
|
|
|
|
// Get system info
|
|
PVR = 0x00040000; // Default: 604
|
|
CPUClockSpeed = 100000000; // Default: 100MHz
|
|
BusClockSpeed = 100000000; // Default: 100MHz
|
|
TimebaseSpeed = 25000000; // Default: 25MHz
|
|
#if EMULATED_PPC
|
|
PVR = 0x000c0000; // Default: 7400 (with AltiVec)
|
|
#elif defined(__APPLE__) && defined(__MACH__)
|
|
proc_file = popen("ioreg -c IOPlatformDevice", "r");
|
|
if (proc_file) {
|
|
char line[256];
|
|
bool powerpc_node = false;
|
|
while (fgets(line, sizeof(line) - 1, proc_file)) {
|
|
// Read line
|
|
int len = strlen(line);
|
|
if (len == 0)
|
|
continue;
|
|
line[len - 1] = 0;
|
|
|
|
// Parse line
|
|
if (strstr(line, "o PowerPC,"))
|
|
powerpc_node = true;
|
|
else if (powerpc_node) {
|
|
uint32 value;
|
|
char head[256];
|
|
if (sscanf(line, "%[ |]\"cpu-version\" = <%x>", head, &value) == 2)
|
|
PVR = value;
|
|
else if (sscanf(line, "%[ |]\"clock-frequency\" = <%x>", head, &value) == 2)
|
|
CPUClockSpeed = value;
|
|
else if (sscanf(line, "%[ |]\"bus-frequency\" = <%x>", head, &value) == 2)
|
|
BusClockSpeed = value;
|
|
else if (sscanf(line, "%[ |]\"timebase-frequency\" = <%x>", head, &value) == 2)
|
|
TimebaseSpeed = value;
|
|
else if (strchr(line, '}'))
|
|
powerpc_node = false;
|
|
}
|
|
}
|
|
fclose(proc_file);
|
|
} else {
|
|
sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno));
|
|
WarningAlert(str);
|
|
}
|
|
#else
|
|
proc_file = fopen("/proc/cpuinfo", "r");
|
|
if (proc_file) {
|
|
// CPU specs from Linux kernel
|
|
// TODO: make it more generic with features (e.g. AltiVec) and
|
|
// cache information and friends for NameRegistry
|
|
static const struct {
|
|
uint32 pvr_mask;
|
|
uint32 pvr_value;
|
|
const char *cpu_name;
|
|
}
|
|
cpu_specs[] = {
|
|
{ 0xffff0000, 0x00010000, "601" },
|
|
{ 0xffff0000, 0x00030000, "603" },
|
|
{ 0xffff0000, 0x00060000, "603e" },
|
|
{ 0xffff0000, 0x00070000, "603ev" },
|
|
{ 0xffff0000, 0x00040000, "604" },
|
|
{ 0xfffff000, 0x00090000, "604e" },
|
|
{ 0xffff0000, 0x00090000, "604r" },
|
|
{ 0xffff0000, 0x000a0000, "604ev" },
|
|
{ 0xffffffff, 0x00084202, "740/750" },
|
|
{ 0xfffff000, 0x00083000, "745/755" },
|
|
{ 0xfffffff0, 0x00080100, "750CX" },
|
|
{ 0xfffffff0, 0x00082200, "750CX" },
|
|
{ 0xfffffff0, 0x00082210, "750CXe" },
|
|
{ 0xffffff00, 0x70000100, "750FX" },
|
|
{ 0xffffffff, 0x70000200, "750FX" },
|
|
{ 0xffff0000, 0x70000000, "750FX" },
|
|
{ 0xffff0000, 0x70020000, "750GX" },
|
|
{ 0xffff0000, 0x00080000, "740/750" },
|
|
{ 0xffffffff, 0x000c1101, "7400 (1.1)" },
|
|
{ 0xffff0000, 0x000c0000, "7400" },
|
|
{ 0xffff0000, 0x800c0000, "7410" },
|
|
{ 0xffffffff, 0x80000200, "7450" },
|
|
{ 0xffffffff, 0x80000201, "7450" },
|
|
{ 0xffff0000, 0x80000000, "7450" },
|
|
{ 0xffffff00, 0x80010100, "7455" },
|
|
{ 0xffffffff, 0x80010200, "7455" },
|
|
{ 0xffff0000, 0x80010000, "7455" },
|
|
{ 0xffff0000, 0x80020000, "7457" },
|
|
{ 0xffff0000, 0x80030000, "7447A" },
|
|
{ 0x7fff0000, 0x00810000, "82xx" },
|
|
{ 0x7fff0000, 0x00820000, "8280" },
|
|
{ 0xffff0000, 0x00400000, "Power3 (630)" },
|
|
{ 0xffff0000, 0x00410000, "Power3 (630+)" },
|
|
{ 0xffff0000, 0x00360000, "I-star" },
|
|
{ 0xffff0000, 0x00370000, "S-star" },
|
|
{ 0xffff0000, 0x00350000, "Power4" },
|
|
{ 0xffff0000, 0x00390000, "PPC970" },
|
|
{ 0, 0, 0 }
|
|
};
|
|
|
|
char line[256];
|
|
while(fgets(line, 255, proc_file)) {
|
|
// Read line
|
|
int len = strlen(line);
|
|
if (len == 0)
|
|
continue;
|
|
line[len-1] = 0;
|
|
|
|
// Parse line
|
|
int i;
|
|
char value[256];
|
|
if (sscanf(line, "cpu : %[0-9A-Za-a]", value) == 1) {
|
|
// Search by name
|
|
const char *cpu_name = NULL;
|
|
for (int i = 0; cpu_specs[i].pvr_mask != 0; i++) {
|
|
if (strcmp(cpu_specs[i].cpu_name, value) == 0) {
|
|
cpu_name = cpu_specs[i].cpu_name;
|
|
PVR = cpu_specs[i].pvr_value;
|
|
break;
|
|
}
|
|
}
|
|
if (cpu_name == NULL)
|
|
printf("WARNING: Unknown CPU type '%s', assuming 604\n", value);
|
|
else
|
|
printf("Found a PowerPC %s processor\n", cpu_name);
|
|
}
|
|
if (sscanf(line, "clock : %dMHz", &i) == 1)
|
|
CPUClockSpeed = BusClockSpeed = i * 1000000;
|
|
}
|
|
fclose(proc_file);
|
|
} else {
|
|
sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno));
|
|
WarningAlert(str);
|
|
}
|
|
|
|
// Get actual bus frequency
|
|
proc_file = fopen("/proc/device-tree/clock-frequency", "r");
|
|
if (proc_file) {
|
|
union { uint8 b[4]; uint32 l; } value;
|
|
if (fread(value.b, sizeof(value), 1, proc_file) == 1)
|
|
BusClockSpeed = value.l;
|
|
fclose(proc_file);
|
|
}
|
|
|
|
// Get actual timebase frequency
|
|
TimebaseSpeed = BusClockSpeed / 4;
|
|
DIR *cpus_dir;
|
|
if ((cpus_dir = opendir("/proc/device-tree/cpus")) != NULL) {
|
|
struct dirent *cpu_entry;
|
|
while ((cpu_entry = readdir(cpus_dir)) != NULL) {
|
|
if (strstr(cpu_entry->d_name, "PowerPC,") == cpu_entry->d_name) {
|
|
char timebase_freq_node[256];
|
|
sprintf(timebase_freq_node, "/proc/device-tree/cpus/%s/timebase-frequency", cpu_entry->d_name);
|
|
proc_file = fopen(timebase_freq_node, "r");
|
|
if (proc_file) {
|
|
union { uint8 b[4]; uint32 l; } value;
|
|
if (fread(value.b, sizeof(value), 1, proc_file) == 1)
|
|
TimebaseSpeed = value.l;
|
|
fclose(proc_file);
|
|
}
|
|
}
|
|
}
|
|
closedir(cpus_dir);
|
|
}
|
|
#endif
|
|
// Remap any newer G4/G5 processor to plain G4 for compatibility
|
|
switch (PVR >> 16) {
|
|
case 0x8000: // 7450
|
|
case 0x8001: // 7455
|
|
case 0x8002: // 7457
|
|
case 0x0039: // 970
|
|
PVR = 0x000c0000; // 7400
|
|
break;
|
|
}
|
|
D(bug("PVR: %08x (assumed)\n", PVR));
|
|
|
|
// Init system routines
|
|
SysInit();
|
|
|
|
// Show preferences editor
|
|
if (!PrefsFindBool("nogui"))
|
|
if (!PrefsEditor())
|
|
goto quit;
|
|
|
|
#if !EMULATED_PPC
|
|
// Check some things
|
|
paranoia_check();
|
|
#endif
|
|
|
|
// Open /dev/zero
|
|
zero_fd = open("/dev/zero", O_RDWR);
|
|
if (zero_fd < 0) {
|
|
sprintf(str, GetString(STR_NO_DEV_ZERO_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
|
|
#ifndef PAGEZERO_HACK
|
|
// Create Low Memory area (0x0000..0x3000)
|
|
if (vm_mac_acquire(0, 0x3000) < 0) {
|
|
sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
lm_area_mapped = true;
|
|
#endif
|
|
|
|
// Create areas for Kernel Data
|
|
if (!kernel_data_init())
|
|
goto quit;
|
|
kernel_data = (KernelData *)Mac2HostAddr(KERNEL_DATA_BASE);
|
|
emulator_data = &kernel_data->ed;
|
|
KernelDataAddr = KERNEL_DATA_BASE;
|
|
D(bug("Kernel Data at %p (%08x)\n", kernel_data, KERNEL_DATA_BASE));
|
|
D(bug("Emulator Data at %p (%08x)\n", emulator_data, KERNEL_DATA_BASE + offsetof(KernelData, ed)));
|
|
|
|
// Create area for DR Cache
|
|
if (vm_mac_acquire(DR_EMULATOR_BASE, DR_EMULATOR_SIZE) < 0) {
|
|
sprintf(str, GetString(STR_DR_EMULATOR_MMAP_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
dr_emulator_area_mapped = true;
|
|
if (vm_mac_acquire(DR_CACHE_BASE, DR_CACHE_SIZE) < 0) {
|
|
sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
dr_cache_area_mapped = true;
|
|
#if !EMULATED_PPC
|
|
if (vm_protect((char *)DR_CACHE_BASE, DR_CACHE_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
|
|
sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
#endif
|
|
DRCacheAddr = DR_CACHE_BASE;
|
|
D(bug("DR Cache at %p\n", DRCacheAddr));
|
|
|
|
// Create area for SheepShaver data
|
|
if (!SheepMem::Init()) {
|
|
sprintf(str, GetString(STR_SHEEP_MEM_MMAP_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
|
|
// Create area for Mac ROM
|
|
if (vm_mac_acquire(ROM_BASE, ROM_AREA_SIZE) < 0) {
|
|
sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
ROMBaseHost = Mac2HostAddr(ROM_BASE);
|
|
#if !EMULATED_PPC
|
|
if (vm_protect(ROMBaseHost, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
|
|
sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
#endif
|
|
rom_area_mapped = true;
|
|
D(bug("ROM area at %p (%08x)\n", ROMBaseHost, ROM_BASE));
|
|
|
|
// Create area for Mac RAM
|
|
RAMSize = PrefsFindInt32("ramsize");
|
|
if (RAMSize < 8*1024*1024) {
|
|
WarningAlert(GetString(STR_SMALL_RAM_WARN));
|
|
RAMSize = 8*1024*1024;
|
|
}
|
|
|
|
if (vm_mac_acquire(RAM_BASE, RAMSize) < 0) {
|
|
sprintf(str, GetString(STR_RAM_MMAP_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
RAMBaseHost = Mac2HostAddr(RAM_BASE);
|
|
#if !EMULATED_PPC
|
|
if (vm_protect(RAMBaseHost, RAMSize, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
|
|
sprintf(str, GetString(STR_RAM_MMAP_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
#endif
|
|
RAMBase = RAM_BASE;
|
|
ram_area_mapped = true;
|
|
D(bug("RAM area at %p (%08x)\n", RAMBaseHost, RAMBase));
|
|
|
|
if (RAMBase > ROM_BASE) {
|
|
ErrorAlert(GetString(STR_RAM_HIGHER_THAN_ROM_ERR));
|
|
goto quit;
|
|
}
|
|
|
|
// Load Mac ROM
|
|
rom_path = PrefsFindString("rom");
|
|
rom_fd = open(rom_path ? rom_path : ROM_FILE_NAME, O_RDONLY);
|
|
if (rom_fd < 0) {
|
|
rom_fd = open(rom_path ? rom_path : ROM_FILE_NAME2, O_RDONLY);
|
|
if (rom_fd < 0) {
|
|
ErrorAlert(GetString(STR_NO_ROM_FILE_ERR));
|
|
goto quit;
|
|
}
|
|
}
|
|
printf(GetString(STR_READING_ROM_FILE));
|
|
rom_size = lseek(rom_fd, 0, SEEK_END);
|
|
lseek(rom_fd, 0, SEEK_SET);
|
|
rom_tmp = new uint8[ROM_SIZE];
|
|
actual = read(rom_fd, (void *)rom_tmp, ROM_SIZE);
|
|
close(rom_fd);
|
|
|
|
// Decode Mac ROM
|
|
if (!DecodeROM(rom_tmp, actual)) {
|
|
if (rom_size != 4*1024*1024) {
|
|
ErrorAlert(GetString(STR_ROM_SIZE_ERR));
|
|
goto quit;
|
|
} else {
|
|
ErrorAlert(GetString(STR_ROM_FILE_READ_ERR));
|
|
goto quit;
|
|
}
|
|
}
|
|
delete[] rom_tmp;
|
|
|
|
// Initialize everything
|
|
if (!InitAll())
|
|
goto quit;
|
|
D(bug("Initialization complete\n"));
|
|
|
|
// Clear caches (as we loaded and patched code) and write protect ROM
|
|
#if !EMULATED_PPC
|
|
flush_icache_range(ROM_BASE, ROM_BASE + ROM_AREA_SIZE);
|
|
#endif
|
|
vm_protect(ROMBaseHost, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_EXECUTE);
|
|
|
|
// Start 60Hz thread
|
|
tick_thread_cancel = false;
|
|
tick_thread_active = (pthread_create(&tick_thread, NULL, tick_func, NULL) == 0);
|
|
D(bug("Tick thread installed (%ld)\n", tick_thread));
|
|
|
|
// Start NVRAM watchdog thread
|
|
memcpy(last_xpram, XPRAM, XPRAM_SIZE);
|
|
nvram_thread_cancel = false;
|
|
nvram_thread_active = (pthread_create(&nvram_thread, NULL, nvram_func, NULL) == 0);
|
|
D(bug("NVRAM thread installed (%ld)\n", nvram_thread));
|
|
|
|
#if !EMULATED_PPC
|
|
// Install SIGILL handler
|
|
sigemptyset(&sigill_action.sa_mask); // Block interrupts during ILL handling
|
|
sigaddset(&sigill_action.sa_mask, SIGUSR2);
|
|
sigill_action.sa_sigaction = sigill_handler;
|
|
sigill_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
|
|
#ifdef HAVE_SIGNAL_SA_RESTORER
|
|
sigill_action.sa_restorer = NULL;
|
|
#endif
|
|
if (sigaction(SIGILL, &sigill_action, NULL) < 0) {
|
|
sprintf(str, GetString(STR_SIGILL_INSTALL_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
#endif
|
|
|
|
#if !EMULATED_PPC
|
|
// Install interrupt signal handler
|
|
sigemptyset(&sigusr2_action.sa_mask);
|
|
sigusr2_action.sa_sigaction = sigusr2_handler;
|
|
sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART | SA_SIGINFO;
|
|
#ifdef HAVE_SIGNAL_SA_RESTORER
|
|
sigusr2_action.sa_restorer = NULL;
|
|
#endif
|
|
if (sigaction(SIGUSR2, &sigusr2_action, NULL) < 0) {
|
|
sprintf(str, GetString(STR_SIGUSR2_INSTALL_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
goto quit;
|
|
}
|
|
#endif
|
|
|
|
// Get my thread ID and execute MacOS thread function
|
|
emul_thread = pthread_self();
|
|
D(bug("MacOS thread is %ld\n", emul_thread));
|
|
emul_func(NULL);
|
|
|
|
quit:
|
|
Quit();
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Cleanup and quit
|
|
*/
|
|
|
|
static void Quit(void)
|
|
{
|
|
#if EMULATED_PPC
|
|
// Exit PowerPC emulation
|
|
exit_emul_ppc();
|
|
#endif
|
|
|
|
// Stop 60Hz thread
|
|
if (tick_thread_active) {
|
|
tick_thread_cancel = true;
|
|
pthread_cancel(tick_thread);
|
|
pthread_join(tick_thread, NULL);
|
|
}
|
|
|
|
// Stop NVRAM watchdog thread
|
|
if (nvram_thread_active) {
|
|
nvram_thread_cancel = true;
|
|
pthread_cancel(nvram_thread);
|
|
pthread_join(nvram_thread, NULL);
|
|
}
|
|
|
|
#if !EMULATED_PPC
|
|
// Uninstall SIGSEGV and SIGBUS handlers
|
|
sigemptyset(&sigsegv_action.sa_mask);
|
|
sigsegv_action.sa_handler = SIG_DFL;
|
|
sigsegv_action.sa_flags = 0;
|
|
sigaction(SIGSEGV, &sigsegv_action, NULL);
|
|
sigaction(SIGBUS, &sigsegv_action, NULL);
|
|
|
|
// Uninstall SIGILL handler
|
|
sigemptyset(&sigill_action.sa_mask);
|
|
sigill_action.sa_handler = SIG_DFL;
|
|
sigill_action.sa_flags = 0;
|
|
sigaction(SIGILL, &sigill_action, NULL);
|
|
|
|
// Delete stacks for signal handlers
|
|
for (int i = 0; i < SIG_STACK_COUNT; i++) {
|
|
void *sig_stack = sig_stacks[i].ss_sp;
|
|
if (sig_stack)
|
|
free(sig_stack);
|
|
}
|
|
#endif
|
|
|
|
// Deinitialize everything
|
|
ExitAll();
|
|
|
|
// Delete SheepShaver globals
|
|
SheepMem::Exit();
|
|
|
|
// Delete RAM area
|
|
if (ram_area_mapped)
|
|
vm_mac_release(RAM_BASE, RAMSize);
|
|
|
|
// Delete ROM area
|
|
if (rom_area_mapped)
|
|
vm_mac_release(ROM_BASE, ROM_AREA_SIZE);
|
|
|
|
// Delete DR cache areas
|
|
if (dr_emulator_area_mapped)
|
|
vm_mac_release(DR_EMULATOR_BASE, DR_EMULATOR_SIZE);
|
|
if (dr_cache_area_mapped)
|
|
vm_mac_release(DR_CACHE_BASE, DR_CACHE_SIZE);
|
|
|
|
// Delete Kernel Data area
|
|
kernel_data_exit();
|
|
|
|
// Delete Low Memory area
|
|
if (lm_area_mapped)
|
|
vm_mac_release(0, 0x3000);
|
|
|
|
// Close /dev/zero
|
|
if (zero_fd > 0)
|
|
close(zero_fd);
|
|
|
|
// Exit system routines
|
|
SysExit();
|
|
|
|
// Exit preferences
|
|
PrefsExit();
|
|
|
|
#ifdef ENABLE_MON
|
|
// Exit mon
|
|
mon_exit();
|
|
#endif
|
|
|
|
// Close X11 server connection
|
|
#ifndef USE_SDL_VIDEO
|
|
if (x_display)
|
|
XCloseDisplay(x_display);
|
|
#endif
|
|
|
|
exit(0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Initialize Kernel Data segments
|
|
*/
|
|
|
|
#if defined(__CYGWIN__)
|
|
#define WIN32_LEAN_AND_MEAN
|
|
#include <windows.h>
|
|
|
|
static HANDLE kernel_handle; // Shared memory handle for Kernel Data
|
|
static DWORD allocation_granule; // Minimum size of allocateable are (64K)
|
|
static DWORD kernel_area_size; // Size of Kernel Data area
|
|
#endif
|
|
|
|
static bool kernel_data_init(void)
|
|
{
|
|
char str[256];
|
|
#ifdef _WIN32
|
|
SYSTEM_INFO si;
|
|
GetSystemInfo(&si);
|
|
allocation_granule = si.dwAllocationGranularity;
|
|
kernel_area_size = (KERNEL_AREA_SIZE + allocation_granule - 1) & -allocation_granule;
|
|
|
|
char rcs[10];
|
|
LPVOID kernel_addr;
|
|
kernel_handle = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, kernel_area_size, NULL);
|
|
if (kernel_handle == NULL) {
|
|
sprintf(rcs, "%d", GetLastError());
|
|
sprintf(str, GetString(STR_KD_SHMGET_ERR), rcs);
|
|
ErrorAlert(str);
|
|
return false;
|
|
}
|
|
kernel_addr = (LPVOID)Mac2HostAddr(KERNEL_DATA_BASE & -allocation_granule);
|
|
if (MapViewOfFileEx(kernel_handle, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, kernel_area_size, kernel_addr) != kernel_addr) {
|
|
sprintf(rcs, "%d", GetLastError());
|
|
sprintf(str, GetString(STR_KD_SHMAT_ERR), rcs);
|
|
ErrorAlert(str);
|
|
return false;
|
|
}
|
|
kernel_addr = (LPVOID)Mac2HostAddr(KERNEL_DATA2_BASE & -allocation_granule);
|
|
if (MapViewOfFileEx(kernel_handle, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, kernel_area_size, kernel_addr) != kernel_addr) {
|
|
sprintf(rcs, "%d", GetLastError());
|
|
sprintf(str, GetString(STR_KD2_SHMAT_ERR), rcs);
|
|
ErrorAlert(str);
|
|
return false;
|
|
}
|
|
#else
|
|
kernel_area = shmget(IPC_PRIVATE, KERNEL_AREA_SIZE, 0600);
|
|
if (kernel_area == -1) {
|
|
sprintf(str, GetString(STR_KD_SHMGET_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
return false;
|
|
}
|
|
if (shmat(kernel_area, Mac2HostAddr(KERNEL_DATA_BASE), 0) < 0) {
|
|
sprintf(str, GetString(STR_KD_SHMAT_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
return false;
|
|
}
|
|
if (shmat(kernel_area, Mac2HostAddr(KERNEL_DATA2_BASE), 0) < 0) {
|
|
sprintf(str, GetString(STR_KD2_SHMAT_ERR), strerror(errno));
|
|
ErrorAlert(str);
|
|
return false;
|
|
}
|
|
#endif
|
|
return true;
|
|
}
|
|
|
|
|
|
/*
|
|
* Deallocate Kernel Data segments
|
|
*/
|
|
|
|
static void kernel_data_exit(void)
|
|
{
|
|
#ifdef _WIN32
|
|
if (kernel_handle) {
|
|
UnmapViewOfFile(Mac2HostAddr(KERNEL_DATA_BASE & -allocation_granule));
|
|
UnmapViewOfFile(Mac2HostAddr(KERNEL_DATA2_BASE & -allocation_granule));
|
|
CloseHandle(kernel_handle);
|
|
}
|
|
#else
|
|
if (kernel_area >= 0) {
|
|
shmdt(Mac2HostAddr(KERNEL_DATA_BASE));
|
|
shmdt(Mac2HostAddr(KERNEL_DATA2_BASE));
|
|
shmctl(kernel_area, IPC_RMID, NULL);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* Jump into Mac ROM, start 680x0 emulator
|
|
*/
|
|
|
|
#if EMULATED_PPC
|
|
void jump_to_rom(uint32 entry)
|
|
{
|
|
init_emul_ppc();
|
|
emul_ppc(entry);
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Emulator thread function
|
|
*/
|
|
|
|
static void *emul_func(void *arg)
|
|
{
|
|
// We're now ready to receive signals
|
|
ready_for_signals = true;
|
|
|
|
// Decrease priority, so more time-critical things like audio will work better
|
|
nice(1);
|
|
|
|
// Jump to ROM boot routine
|
|
D(bug("Jumping to ROM\n"));
|
|
#if EMULATED_PPC
|
|
jump_to_rom(ROM_BASE + 0x310000);
|
|
#else
|
|
jump_to_rom(ROM_BASE + 0x310000, (uint32)emulator_data);
|
|
#endif
|
|
D(bug("Returned from ROM\n"));
|
|
|
|
// We're no longer ready to receive signals
|
|
ready_for_signals = false;
|
|
return NULL;
|
|
}
|
|
|
|
|
|
#if !EMULATED_PPC
|
|
/*
|
|
* Execute 68k subroutine (must be ended with RTS)
|
|
* This must only be called by the emul_thread when in EMUL_OP mode
|
|
* r->a[7] is unused, the routine runs on the caller's stack
|
|
*/
|
|
|
|
void Execute68k(uint32 pc, M68kRegisters *r)
|
|
{
|
|
#if SAFE_EXEC_68K
|
|
if (ReadMacInt32(XLM_RUN_MODE) != MODE_EMUL_OP)
|
|
printf("FATAL: Execute68k() not called from EMUL_OP mode\n");
|
|
if (!pthread_equal(pthread_self(), emul_thread))
|
|
printf("FATAL: Execute68k() not called from emul_thread\n");
|
|
#endif
|
|
execute_68k(pc, r);
|
|
}
|
|
|
|
|
|
/*
|
|
* Execute 68k A-Trap from EMUL_OP routine
|
|
* r->a[7] is unused, the routine runs on the caller's stack
|
|
*/
|
|
|
|
void Execute68kTrap(uint16 trap, M68kRegisters *r)
|
|
{
|
|
uint16 proc[2] = {trap, M68K_RTS};
|
|
Execute68k((uint32)proc, r);
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Quit emulator (cause return from jump_to_rom)
|
|
*/
|
|
|
|
void QuitEmulator(void)
|
|
{
|
|
#if EMULATED_PPC
|
|
Quit();
|
|
#else
|
|
quit_emulator();
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* Pause/resume emulator
|
|
*/
|
|
|
|
void PauseEmulator(void)
|
|
{
|
|
pthread_kill(emul_thread, SIGSTOP);
|
|
}
|
|
|
|
void ResumeEmulator(void)
|
|
{
|
|
pthread_kill(emul_thread, SIGCONT);
|
|
}
|
|
|
|
|
|
/*
|
|
* Dump 68k registers
|
|
*/
|
|
|
|
void Dump68kRegs(M68kRegisters *r)
|
|
{
|
|
// Display 68k registers
|
|
for (int i=0; i<8; i++) {
|
|
printf("d%d: %08x", i, r->d[i]);
|
|
if (i == 3 || i == 7)
|
|
printf("\n");
|
|
else
|
|
printf(", ");
|
|
}
|
|
for (int i=0; i<8; i++) {
|
|
printf("a%d: %08x", i, r->a[i]);
|
|
if (i == 3 || i == 7)
|
|
printf("\n");
|
|
else
|
|
printf(", ");
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Make code executable
|
|
*/
|
|
|
|
void MakeExecutable(int dummy, uint32 start, uint32 length)
|
|
{
|
|
if ((start >= ROM_BASE) && (start < (ROM_BASE + ROM_SIZE)))
|
|
return;
|
|
#if EMULATED_PPC
|
|
FlushCodeCache(start, start + length);
|
|
#else
|
|
flush_icache_range(start, start + length);
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* NVRAM watchdog thread (saves NVRAM every minute)
|
|
*/
|
|
|
|
static void nvram_watchdog(void)
|
|
{
|
|
if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
|
|
memcpy(last_xpram, XPRAM, XPRAM_SIZE);
|
|
SaveXPRAM();
|
|
}
|
|
}
|
|
|
|
static void *nvram_func(void *arg)
|
|
{
|
|
while (!nvram_thread_cancel) {
|
|
for (int i=0; i<60 && !nvram_thread_cancel; i++)
|
|
Delay_usec(999999); // Only wait 1 second so we quit promptly when nvram_thread_cancel becomes true
|
|
nvram_watchdog();
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/*
|
|
* 60Hz thread (really 60.15Hz)
|
|
*/
|
|
|
|
static void *tick_func(void *arg)
|
|
{
|
|
int tick_counter = 0;
|
|
uint64 start = GetTicks_usec();
|
|
int64 ticks = 0;
|
|
uint64 next = GetTicks_usec();
|
|
|
|
while (!tick_thread_cancel) {
|
|
|
|
// Wait
|
|
next += 16625;
|
|
int64 delay = next - GetTicks_usec();
|
|
if (delay > 0)
|
|
Delay_usec(delay);
|
|
else if (delay < -16625)
|
|
next = GetTicks_usec();
|
|
ticks++;
|
|
|
|
#if !EMULATED_PPC
|
|
// Did we crash?
|
|
if (emul_thread_fatal) {
|
|
|
|
// Yes, dump registers
|
|
sigregs *r = &sigsegv_regs;
|
|
char str[256];
|
|
if (crash_reason == NULL)
|
|
crash_reason = "SIGSEGV";
|
|
sprintf(str, "%s\n"
|
|
" pc %08lx lr %08lx ctr %08lx msr %08lx\n"
|
|
" xer %08lx cr %08lx \n"
|
|
" r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n"
|
|
" r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n"
|
|
" r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n"
|
|
" r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n"
|
|
" r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n"
|
|
" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n"
|
|
" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n"
|
|
" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n",
|
|
crash_reason,
|
|
r->nip, r->link, r->ctr, r->msr,
|
|
r->xer, r->ccr,
|
|
r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
|
|
r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
|
|
r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
|
|
r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
|
|
r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
|
|
r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
|
|
r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
|
|
r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
|
|
printf(str);
|
|
VideoQuitFullScreen();
|
|
|
|
#ifdef ENABLE_MON
|
|
// Start up mon in real-mode
|
|
printf("Welcome to the sheep factory.\n");
|
|
char *arg[4] = {"mon", "-m", "-r", NULL};
|
|
mon(3, arg);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
// Pseudo Mac 1Hz interrupt, update local time
|
|
if (++tick_counter > 60) {
|
|
tick_counter = 0;
|
|
WriteMacInt32(0x20c, TimerDateTime());
|
|
}
|
|
|
|
// Trigger 60Hz interrupt
|
|
if (ReadMacInt32(XLM_IRQ_NEST) == 0) {
|
|
SetInterruptFlag(INTFLAG_VIA);
|
|
TriggerInterrupt();
|
|
}
|
|
}
|
|
|
|
uint64 end = GetTicks_usec();
|
|
D(bug("%Ld ticks in %Ld usec = %f ticks/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start)));
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/*
|
|
* Pthread configuration
|
|
*/
|
|
|
|
void Set_pthread_attr(pthread_attr_t *attr, int priority)
|
|
{
|
|
#ifdef HAVE_PTHREADS
|
|
pthread_attr_init(attr);
|
|
#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
|
|
// Some of these only work for superuser
|
|
if (geteuid() == 0) {
|
|
pthread_attr_setinheritsched(attr, PTHREAD_EXPLICIT_SCHED);
|
|
pthread_attr_setschedpolicy(attr, SCHED_FIFO);
|
|
struct sched_param fifo_param;
|
|
fifo_param.sched_priority = ((sched_get_priority_min(SCHED_FIFO) +
|
|
sched_get_priority_max(SCHED_FIFO)) / 2 +
|
|
priority);
|
|
pthread_attr_setschedparam(attr, &fifo_param);
|
|
}
|
|
if (pthread_attr_setscope(attr, PTHREAD_SCOPE_SYSTEM) != 0) {
|
|
#ifdef PTHREAD_SCOPE_BOUND_NP
|
|
// If system scope is not available (eg. we're not running
|
|
// with CAP_SCHED_MGT capability on an SGI box), try bound
|
|
// scope. It exposes pthread scheduling to the kernel,
|
|
// without setting realtime priority.
|
|
pthread_attr_setscope(attr, PTHREAD_SCOPE_BOUND_NP);
|
|
#endif
|
|
}
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* Mutexes
|
|
*/
|
|
|
|
#ifdef HAVE_PTHREADS
|
|
|
|
struct B2_mutex {
|
|
B2_mutex() {
|
|
pthread_mutexattr_t attr;
|
|
pthread_mutexattr_init(&attr);
|
|
// Initialize the mutex for priority inheritance --
|
|
// required for accurate timing.
|
|
#if defined(HAVE_PTHREAD_MUTEXATTR_SETPROTOCOL) && !defined(__CYGWIN__)
|
|
pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT);
|
|
#endif
|
|
#if defined(HAVE_PTHREAD_MUTEXATTR_SETTYPE) && defined(PTHREAD_MUTEX_NORMAL)
|
|
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
|
|
#endif
|
|
#ifdef HAVE_PTHREAD_MUTEXATTR_SETPSHARED
|
|
pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_PRIVATE);
|
|
#endif
|
|
pthread_mutex_init(&m, &attr);
|
|
pthread_mutexattr_destroy(&attr);
|
|
}
|
|
~B2_mutex() {
|
|
pthread_mutex_trylock(&m); // Make sure it's locked before
|
|
pthread_mutex_unlock(&m); // unlocking it.
|
|
pthread_mutex_destroy(&m);
|
|
}
|
|
pthread_mutex_t m;
|
|
};
|
|
|
|
B2_mutex *B2_create_mutex(void)
|
|
{
|
|
return new B2_mutex;
|
|
}
|
|
|
|
void B2_lock_mutex(B2_mutex *mutex)
|
|
{
|
|
pthread_mutex_lock(&mutex->m);
|
|
}
|
|
|
|
void B2_unlock_mutex(B2_mutex *mutex)
|
|
{
|
|
pthread_mutex_unlock(&mutex->m);
|
|
}
|
|
|
|
void B2_delete_mutex(B2_mutex *mutex)
|
|
{
|
|
delete mutex;
|
|
}
|
|
|
|
#else
|
|
|
|
struct B2_mutex {
|
|
int dummy;
|
|
};
|
|
|
|
B2_mutex *B2_create_mutex(void)
|
|
{
|
|
return new B2_mutex;
|
|
}
|
|
|
|
void B2_lock_mutex(B2_mutex *mutex)
|
|
{
|
|
}
|
|
|
|
void B2_unlock_mutex(B2_mutex *mutex)
|
|
{
|
|
}
|
|
|
|
void B2_delete_mutex(B2_mutex *mutex)
|
|
{
|
|
delete mutex;
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Trigger signal USR2 from another thread
|
|
*/
|
|
|
|
#if !EMULATED_PPC
|
|
void TriggerInterrupt(void)
|
|
{
|
|
if (ready_for_signals)
|
|
pthread_kill(emul_thread, SIGUSR2);
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Interrupt flags (must be handled atomically!)
|
|
*/
|
|
|
|
volatile uint32 InterruptFlags = 0;
|
|
|
|
void SetInterruptFlag(uint32 flag)
|
|
{
|
|
atomic_or((int *)&InterruptFlags, flag);
|
|
}
|
|
|
|
void ClearInterruptFlag(uint32 flag)
|
|
{
|
|
atomic_and((int *)&InterruptFlags, ~flag);
|
|
}
|
|
|
|
|
|
/*
|
|
* Disable interrupts
|
|
*/
|
|
|
|
void DisableInterrupt(void)
|
|
{
|
|
#if EMULATED_PPC
|
|
WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) + 1);
|
|
#else
|
|
atomic_add((int *)XLM_IRQ_NEST, 1);
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* Enable interrupts
|
|
*/
|
|
|
|
void EnableInterrupt(void)
|
|
{
|
|
#if EMULATED_PPC
|
|
WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) - 1);
|
|
#else
|
|
atomic_add((int *)XLM_IRQ_NEST, -1);
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* USR2 handler
|
|
*/
|
|
|
|
#if !EMULATED_PPC
|
|
static void sigusr2_handler(int sig, siginfo_t *sip, void *scp)
|
|
{
|
|
machine_regs *r = MACHINE_REGISTERS(scp);
|
|
|
|
#ifdef USE_SDL_VIDEO
|
|
// We must fill in the events queue in the same thread that did call SDL_SetVideoMode()
|
|
SDL_PumpEvents();
|
|
#endif
|
|
|
|
// Do nothing if interrupts are disabled
|
|
if (*(int32 *)XLM_IRQ_NEST > 0)
|
|
return;
|
|
|
|
#ifdef SYSTEM_CLOBBERS_R2
|
|
// Restore pointer to Thread Local Storage
|
|
set_r2(TOC);
|
|
#endif
|
|
#ifdef SYSTEM_CLOBBERS_R13
|
|
// Restore pointer to .sdata section
|
|
set_r13(R13);
|
|
#endif
|
|
|
|
// Disable MacOS stack sniffer
|
|
WriteMacInt32(0x110, 0);
|
|
|
|
// Interrupt action depends on current run mode
|
|
switch (ReadMacInt32(XLM_RUN_MODE)) {
|
|
case MODE_68K:
|
|
// 68k emulator active, trigger 68k interrupt level 1
|
|
WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
|
|
r->cr() |= ntohl(kernel_data->v[0x674 >> 2]);
|
|
break;
|
|
|
|
#if INTERRUPTS_IN_NATIVE_MODE
|
|
case MODE_NATIVE:
|
|
// 68k emulator inactive, in nanokernel?
|
|
if (r->gpr(1) != KernelDataAddr) {
|
|
|
|
// Set extra stack for nested interrupts
|
|
sig_stack_acquire();
|
|
|
|
// Prepare for 68k interrupt level 1
|
|
WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
|
|
WriteMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc, ReadMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc) | ntohl(kernel_data->v[0x674 >> 2]));
|
|
|
|
// Execute nanokernel interrupt routine (this will activate the 68k emulator)
|
|
DisableInterrupt();
|
|
if (ROMType == ROMTYPE_NEWWORLD)
|
|
ppc_interrupt(ROM_BASE + 0x312b1c, KernelDataAddr);
|
|
else
|
|
ppc_interrupt(ROM_BASE + 0x312a3c, KernelDataAddr);
|
|
|
|
// Reset normal signal stack
|
|
sig_stack_release();
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
#if INTERRUPTS_IN_EMUL_OP_MODE
|
|
case MODE_EMUL_OP:
|
|
// 68k emulator active, within EMUL_OP routine, execute 68k interrupt routine directly when interrupt level is 0
|
|
if ((ReadMacInt32(XLM_68K_R25) & 7) == 0) {
|
|
|
|
// Set extra stack for SIGSEGV handler
|
|
sig_stack_acquire();
|
|
#if 1
|
|
// Execute full 68k interrupt routine
|
|
M68kRegisters r;
|
|
uint32 old_r25 = ReadMacInt32(XLM_68K_R25); // Save interrupt level
|
|
WriteMacInt32(XLM_68K_R25, 0x21); // Execute with interrupt level 1
|
|
static const uint16 proc[] = {
|
|
0x3f3c, 0x0000, // move.w #$0000,-(sp) (fake format word)
|
|
0x487a, 0x000a, // pea @1(pc) (return address)
|
|
0x40e7, // move sr,-(sp) (saved SR)
|
|
0x2078, 0x0064, // move.l $64,a0
|
|
0x4ed0, // jmp (a0)
|
|
M68K_RTS // @1
|
|
};
|
|
Execute68k((uint32)proc, &r);
|
|
WriteMacInt32(XLM_68K_R25, old_r25); // Restore interrupt level
|
|
#else
|
|
// Only update cursor
|
|
if (HasMacStarted()) {
|
|
if (InterruptFlags & INTFLAG_VIA) {
|
|
ClearInterruptFlag(INTFLAG_VIA);
|
|
ADBInterrupt();
|
|
ExecuteNative(NATIVE_VIDEO_VBL);
|
|
}
|
|
}
|
|
#endif
|
|
// Reset normal signal stack
|
|
sig_stack_release();
|
|
}
|
|
break;
|
|
#endif
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* SIGSEGV handler
|
|
*/
|
|
|
|
#if !EMULATED_PPC
|
|
static void sigsegv_handler(int sig, siginfo_t *sip, void *scp)
|
|
{
|
|
machine_regs *r = MACHINE_REGISTERS(scp);
|
|
|
|
// Get effective address
|
|
uint32 addr = r->dar();
|
|
|
|
#ifdef SYSTEM_CLOBBERS_R2
|
|
// Restore pointer to Thread Local Storage
|
|
set_r2(TOC);
|
|
#endif
|
|
#ifdef SYSTEM_CLOBBERS_R13
|
|
// Restore pointer to .sdata section
|
|
set_r13(R13);
|
|
#endif
|
|
|
|
#if ENABLE_VOSF
|
|
// Handle screen fault.
|
|
extern bool Screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction);
|
|
if (Screen_fault_handler((sigsegv_address_t)addr, (sigsegv_address_t)r->pc()))
|
|
return;
|
|
#endif
|
|
|
|
num_segv++;
|
|
|
|
// Fault in Mac ROM or RAM or DR Cache?
|
|
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));
|
|
if (mac_fault) {
|
|
|
|
// "VM settings" during MacOS 8 installation
|
|
if (r->pc() == ROM_BASE + 0x488160 && r->gpr(20) == 0xf8000000) {
|
|
r->pc() += 4;
|
|
r->gpr(8) = 0;
|
|
return;
|
|
|
|
// MacOS 8.5 installation
|
|
} else if (r->pc() == ROM_BASE + 0x488140 && r->gpr(16) == 0xf8000000) {
|
|
r->pc() += 4;
|
|
r->gpr(8) = 0;
|
|
return;
|
|
|
|
// MacOS 8 serial drivers on startup
|
|
} else if (r->pc() == ROM_BASE + 0x48e080 && (r->gpr(8) == 0xf3012002 || r->gpr(8) == 0xf3012000)) {
|
|
r->pc() += 4;
|
|
r->gpr(8) = 0;
|
|
return;
|
|
|
|
// MacOS 8.1 serial drivers on startup
|
|
} else if (r->pc() == ROM_BASE + 0x48c5e0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
|
|
r->pc() += 4;
|
|
return;
|
|
} else if (r->pc() == ROM_BASE + 0x4a10a0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
|
|
r->pc() += 4;
|
|
return;
|
|
|
|
// MacOS 8.6 serial drivers on startup (with DR Cache and OldWorld ROM)
|
|
} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(16) == 0xf3012002 || r->gpr(16) == 0xf3012000)) {
|
|
r->pc() += 4;
|
|
return;
|
|
} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
|
|
r->pc() += 4;
|
|
return;
|
|
}
|
|
|
|
// Get opcode and divide into fields
|
|
uint32 opcode = *((uint32 *)r->pc());
|
|
uint32 primop = opcode >> 26;
|
|
uint32 exop = (opcode >> 1) & 0x3ff;
|
|
uint32 ra = (opcode >> 16) & 0x1f;
|
|
uint32 rb = (opcode >> 11) & 0x1f;
|
|
uint32 rd = (opcode >> 21) & 0x1f;
|
|
int32 imm = (int16)(opcode & 0xffff);
|
|
|
|
// Analyze opcode
|
|
enum {
|
|
TYPE_UNKNOWN,
|
|
TYPE_LOAD,
|
|
TYPE_STORE
|
|
} transfer_type = TYPE_UNKNOWN;
|
|
enum {
|
|
SIZE_UNKNOWN,
|
|
SIZE_BYTE,
|
|
SIZE_HALFWORD,
|
|
SIZE_WORD
|
|
} transfer_size = SIZE_UNKNOWN;
|
|
enum {
|
|
MODE_UNKNOWN,
|
|
MODE_NORM,
|
|
MODE_U,
|
|
MODE_X,
|
|
MODE_UX
|
|
} addr_mode = MODE_UNKNOWN;
|
|
switch (primop) {
|
|
case 31:
|
|
switch (exop) {
|
|
case 23: // lwzx
|
|
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_X; break;
|
|
case 55: // lwzux
|
|
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_UX; break;
|
|
case 87: // lbzx
|
|
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_X; break;
|
|
case 119: // lbzux
|
|
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_UX; break;
|
|
case 151: // stwx
|
|
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_X; break;
|
|
case 183: // stwux
|
|
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_UX; break;
|
|
case 215: // stbx
|
|
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_X; break;
|
|
case 247: // stbux
|
|
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_UX; break;
|
|
case 279: // lhzx
|
|
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break;
|
|
case 311: // lhzux
|
|
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break;
|
|
case 343: // lhax
|
|
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break;
|
|
case 375: // lhaux
|
|
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break;
|
|
case 407: // sthx
|
|
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break;
|
|
case 439: // sthux
|
|
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break;
|
|
}
|
|
break;
|
|
|
|
case 32: // lwz
|
|
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break;
|
|
case 33: // lwzu
|
|
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_U; break;
|
|
case 34: // lbz
|
|
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_NORM; break;
|
|
case 35: // lbzu
|
|
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_U; break;
|
|
case 36: // stw
|
|
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break;
|
|
case 37: // stwu
|
|
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_U; break;
|
|
case 38: // stb
|
|
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_NORM; break;
|
|
case 39: // stbu
|
|
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_U; break;
|
|
case 40: // lhz
|
|
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break;
|
|
case 41: // lhzu
|
|
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break;
|
|
case 42: // lha
|
|
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break;
|
|
case 43: // lhau
|
|
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break;
|
|
case 44: // sth
|
|
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break;
|
|
case 45: // sthu
|
|
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break;
|
|
#if EMULATE_UNALIGNED_LOADSTORE_MULTIPLE
|
|
case 46: // lmw
|
|
if ((addr % 4) != 0) {
|
|
uint32 ea = addr;
|
|
D(bug("WARNING: unaligned lmw to EA=%08x from IP=%08x\n", ea, r->pc()));
|
|
for (int i = rd; i <= 31; i++) {
|
|
r->gpr(i) = ReadMacInt32(ea);
|
|
ea += 4;
|
|
}
|
|
r->pc() += 4;
|
|
goto rti;
|
|
}
|
|
break;
|
|
case 47: // stmw
|
|
if ((addr % 4) != 0) {
|
|
uint32 ea = addr;
|
|
D(bug("WARNING: unaligned stmw to EA=%08x from IP=%08x\n", ea, r->pc()));
|
|
for (int i = rd; i <= 31; i++) {
|
|
WriteMacInt32(ea, r->gpr(i));
|
|
ea += 4;
|
|
}
|
|
r->pc() += 4;
|
|
goto rti;
|
|
}
|
|
break;
|
|
#endif
|
|
}
|
|
|
|
// Ignore ROM writes (including to the zero page, which is read-only)
|
|
if (transfer_type == TYPE_STORE &&
|
|
((addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) ||
|
|
(addr >= SheepMem::ZeroPage() && addr < SheepMem::ZeroPage() + SheepMem::PageSize()))) {
|
|
// 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()));
|
|
if (addr_mode == MODE_U || addr_mode == MODE_UX)
|
|
r->gpr(ra) = addr;
|
|
r->pc() += 4;
|
|
goto rti;
|
|
}
|
|
|
|
// Ignore illegal memory accesses?
|
|
if (PrefsFindBool("ignoresegv")) {
|
|
if (addr_mode == MODE_U || addr_mode == MODE_UX)
|
|
r->gpr(ra) = addr;
|
|
if (transfer_type == TYPE_LOAD)
|
|
r->gpr(rd) = 0;
|
|
r->pc() += 4;
|
|
goto rti;
|
|
}
|
|
|
|
// In GUI mode, show error alert
|
|
if (!PrefsFindBool("nogui")) {
|
|
char str[256];
|
|
if (transfer_type == TYPE_LOAD || transfer_type == TYPE_STORE)
|
|
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));
|
|
else
|
|
sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
|
|
ErrorAlert(str);
|
|
QuitEmulator();
|
|
return;
|
|
}
|
|
}
|
|
|
|
// For all other errors, jump into debugger (sort of...)
|
|
crash_reason = (sig == SIGBUS) ? "SIGBUS" : "SIGSEGV";
|
|
if (!ready_for_signals) {
|
|
printf("%s\n");
|
|
printf(" sigcontext %p, machine_regs %p\n", scp, r);
|
|
printf(
|
|
" pc %08lx lr %08lx ctr %08lx msr %08lx\n"
|
|
" xer %08lx cr %08lx \n"
|
|
" r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n"
|
|
" r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n"
|
|
" r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n"
|
|
" r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n"
|
|
" r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n"
|
|
" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n"
|
|
" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n"
|
|
" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n",
|
|
crash_reason,
|
|
r->pc(), r->lr(), r->ctr(), r->msr(),
|
|
r->xer(), r->cr(),
|
|
r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
|
|
r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
|
|
r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
|
|
r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
|
|
r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
|
|
r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
|
|
r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
|
|
r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
|
|
exit(1);
|
|
QuitEmulator();
|
|
return;
|
|
} else {
|
|
// We crashed. Save registers, tell tick thread and loop forever
|
|
build_sigregs(&sigsegv_regs, r);
|
|
emul_thread_fatal = true;
|
|
for (;;) ;
|
|
}
|
|
rti:;
|
|
}
|
|
|
|
|
|
/*
|
|
* SIGILL handler
|
|
*/
|
|
|
|
static void sigill_handler(int sig, siginfo_t *sip, void *scp)
|
|
{
|
|
machine_regs *r = MACHINE_REGISTERS(scp);
|
|
char str[256];
|
|
|
|
#ifdef SYSTEM_CLOBBERS_R2
|
|
// Restore pointer to Thread Local Storage
|
|
set_r2(TOC);
|
|
#endif
|
|
#ifdef SYSTEM_CLOBBERS_R13
|
|
// Restore pointer to .sdata section
|
|
set_r13(R13);
|
|
#endif
|
|
|
|
// Fault in Mac ROM or RAM?
|
|
bool mac_fault = (r->pc() >= ROM_BASE) && (r->pc() < (ROM_BASE + ROM_AREA_SIZE)) || (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize));
|
|
if (mac_fault) {
|
|
|
|
// Get opcode and divide into fields
|
|
uint32 opcode = *((uint32 *)r->pc());
|
|
uint32 primop = opcode >> 26;
|
|
uint32 exop = (opcode >> 1) & 0x3ff;
|
|
uint32 ra = (opcode >> 16) & 0x1f;
|
|
uint32 rb = (opcode >> 11) & 0x1f;
|
|
uint32 rd = (opcode >> 21) & 0x1f;
|
|
int32 imm = (int16)(opcode & 0xffff);
|
|
|
|
switch (primop) {
|
|
case 9: // POWER instructions
|
|
case 22:
|
|
power_inst: sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->pc(), r->gpr(1), opcode);
|
|
ErrorAlert(str);
|
|
QuitEmulator();
|
|
return;
|
|
|
|
case 31:
|
|
switch (exop) {
|
|
case 83: // mfmsr
|
|
r->gpr(rd) = 0xf072;
|
|
r->pc() += 4;
|
|
goto rti;
|
|
|
|
case 210: // mtsr
|
|
case 242: // mtsrin
|
|
case 306: // tlbie
|
|
r->pc() += 4;
|
|
goto rti;
|
|
|
|
case 339: { // mfspr
|
|
int spr = ra | (rb << 5);
|
|
switch (spr) {
|
|
case 0: // MQ
|
|
case 22: // DEC
|
|
case 952: // MMCR0
|
|
case 953: // PMC1
|
|
case 954: // PMC2
|
|
case 955: // SIA
|
|
case 956: // MMCR1
|
|
case 957: // PMC3
|
|
case 958: // PMC4
|
|
case 959: // SDA
|
|
r->pc() += 4;
|
|
goto rti;
|
|
case 25: // SDR1
|
|
r->gpr(rd) = 0xdead001f;
|
|
r->pc() += 4;
|
|
goto rti;
|
|
case 287: // PVR
|
|
r->gpr(rd) = PVR;
|
|
r->pc() += 4;
|
|
goto rti;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 467: { // mtspr
|
|
int spr = ra | (rb << 5);
|
|
switch (spr) {
|
|
case 0: // MQ
|
|
case 22: // DEC
|
|
case 275: // SPRG3
|
|
case 528: // IBAT0U
|
|
case 529: // IBAT0L
|
|
case 530: // IBAT1U
|
|
case 531: // IBAT1L
|
|
case 532: // IBAT2U
|
|
case 533: // IBAT2L
|
|
case 534: // IBAT3U
|
|
case 535: // IBAT3L
|
|
case 536: // DBAT0U
|
|
case 537: // DBAT0L
|
|
case 538: // DBAT1U
|
|
case 539: // DBAT1L
|
|
case 540: // DBAT2U
|
|
case 541: // DBAT2L
|
|
case 542: // DBAT3U
|
|
case 543: // DBAT3L
|
|
case 952: // MMCR0
|
|
case 953: // PMC1
|
|
case 954: // PMC2
|
|
case 955: // SIA
|
|
case 956: // MMCR1
|
|
case 957: // PMC3
|
|
case 958: // PMC4
|
|
case 959: // SDA
|
|
r->pc() += 4;
|
|
goto rti;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 29: case 107: case 152: case 153: // POWER instructions
|
|
case 184: case 216: case 217: case 248:
|
|
case 264: case 277: case 331: case 360:
|
|
case 363: case 488: case 531: case 537:
|
|
case 541: case 664: case 665: case 696:
|
|
case 728: case 729: case 760: case 920:
|
|
case 921: case 952:
|
|
goto power_inst;
|
|
}
|
|
}
|
|
|
|
// In GUI mode, show error alert
|
|
if (!PrefsFindBool("nogui")) {
|
|
sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
|
|
ErrorAlert(str);
|
|
QuitEmulator();
|
|
return;
|
|
}
|
|
}
|
|
|
|
// For all other errors, jump into debugger (sort of...)
|
|
crash_reason = "SIGILL";
|
|
if (!ready_for_signals) {
|
|
printf("%s\n");
|
|
printf(" sigcontext %p, machine_regs %p\n", scp, r);
|
|
printf(
|
|
" pc %08lx lr %08lx ctr %08lx msr %08lx\n"
|
|
" xer %08lx cr %08lx \n"
|
|
" r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n"
|
|
" r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n"
|
|
" r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n"
|
|
" r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n"
|
|
" r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n"
|
|
" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n"
|
|
" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n"
|
|
" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n",
|
|
crash_reason,
|
|
r->pc(), r->lr(), r->ctr(), r->msr(),
|
|
r->xer(), r->cr(),
|
|
r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
|
|
r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
|
|
r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
|
|
r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
|
|
r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
|
|
r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
|
|
r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
|
|
r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
|
|
exit(1);
|
|
QuitEmulator();
|
|
return;
|
|
} else {
|
|
// We crashed. Save registers, tell tick thread and loop forever
|
|
build_sigregs(&sigsegv_regs, r);
|
|
emul_thread_fatal = true;
|
|
for (;;) ;
|
|
}
|
|
rti:;
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Helpers to share 32-bit addressable data with MacOS
|
|
*/
|
|
|
|
bool SheepMem::Init(void)
|
|
{
|
|
// Size of a native page
|
|
page_size = getpagesize();
|
|
|
|
// Allocate SheepShaver globals
|
|
proc = base;
|
|
if (vm_mac_acquire(base, size) < 0)
|
|
return false;
|
|
|
|
// Allocate page with all bits set to 0, right in the middle
|
|
// This is also used to catch undesired overlaps between proc and data areas
|
|
zero_page = proc + (size / 2);
|
|
Mac_memset(zero_page, 0, page_size);
|
|
if (vm_protect(Mac2HostAddr(zero_page), page_size, VM_PAGE_READ) < 0)
|
|
return false;
|
|
|
|
#if EMULATED_PPC
|
|
// Allocate alternate stack for PowerPC interrupt routine
|
|
sig_stack = base + size;
|
|
if (vm_mac_acquire(sig_stack, SIG_STACK_SIZE) < 0)
|
|
return false;
|
|
#endif
|
|
|
|
data = base + size;
|
|
return true;
|
|
}
|
|
|
|
void SheepMem::Exit(void)
|
|
{
|
|
if (data) {
|
|
// Delete SheepShaver globals
|
|
vm_mac_release(base, size);
|
|
|
|
#if EMULATED_PPC
|
|
// Delete alternate stack for PowerPC interrupt routine
|
|
vm_mac_release(sig_stack, SIG_STACK_SIZE);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Display alert
|
|
*/
|
|
|
|
#ifdef ENABLE_GTK
|
|
static void dl_destroyed(void)
|
|
{
|
|
gtk_main_quit();
|
|
}
|
|
|
|
static void dl_quit(GtkWidget *dialog)
|
|
{
|
|
gtk_widget_destroy(dialog);
|
|
}
|
|
|
|
void display_alert(int title_id, int prefix_id, int button_id, const char *text)
|
|
{
|
|
char str[256];
|
|
sprintf(str, GetString(prefix_id), text);
|
|
|
|
GtkWidget *dialog = gtk_dialog_new();
|
|
gtk_window_set_title(GTK_WINDOW(dialog), GetString(title_id));
|
|
gtk_container_border_width(GTK_CONTAINER(dialog), 5);
|
|
gtk_widget_set_uposition(GTK_WIDGET(dialog), 100, 150);
|
|
gtk_signal_connect(GTK_OBJECT(dialog), "destroy", GTK_SIGNAL_FUNC(dl_destroyed), NULL);
|
|
|
|
GtkWidget *label = gtk_label_new(str);
|
|
gtk_widget_show(label);
|
|
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), label, TRUE, TRUE, 0);
|
|
|
|
GtkWidget *button = gtk_button_new_with_label(GetString(button_id));
|
|
gtk_widget_show(button);
|
|
gtk_signal_connect_object(GTK_OBJECT(button), "clicked", GTK_SIGNAL_FUNC(dl_quit), GTK_OBJECT(dialog));
|
|
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->action_area), button, FALSE, FALSE, 0);
|
|
GTK_WIDGET_SET_FLAGS(button, GTK_CAN_DEFAULT);
|
|
gtk_widget_grab_default(button);
|
|
gtk_widget_show(dialog);
|
|
|
|
gtk_main();
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Display error alert
|
|
*/
|
|
|
|
void ErrorAlert(const char *text)
|
|
{
|
|
#if defined(ENABLE_GTK) && !defined(USE_SDL_VIDEO)
|
|
if (PrefsFindBool("nogui") || x_display == NULL) {
|
|
printf(GetString(STR_SHELL_ERROR_PREFIX), text);
|
|
return;
|
|
}
|
|
VideoQuitFullScreen();
|
|
display_alert(STR_ERROR_ALERT_TITLE, STR_GUI_ERROR_PREFIX, STR_QUIT_BUTTON, text);
|
|
#else
|
|
printf(GetString(STR_SHELL_ERROR_PREFIX), text);
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* Display warning alert
|
|
*/
|
|
|
|
void WarningAlert(const char *text)
|
|
{
|
|
#if defined(ENABLE_GTK) && !defined(USE_SDL_VIDEO)
|
|
if (PrefsFindBool("nogui") || x_display == NULL) {
|
|
printf(GetString(STR_SHELL_WARNING_PREFIX), text);
|
|
return;
|
|
}
|
|
display_alert(STR_WARNING_ALERT_TITLE, STR_GUI_WARNING_PREFIX, STR_OK_BUTTON, text);
|
|
#else
|
|
printf(GetString(STR_SHELL_WARNING_PREFIX), text);
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* Display choice alert
|
|
*/
|
|
|
|
bool ChoiceAlert(const char *text, const char *pos, const char *neg)
|
|
{
|
|
printf(GetString(STR_SHELL_WARNING_PREFIX), text);
|
|
return false; //!!
|
|
}
|