mirror of
https://github.com/kanjitalk755/macemu.git
synced 2024-12-24 10:32:32 +00:00
- added video_vosf_init()/video_vosf_exit() for initialization and destruction
of the internal structures used for the VOSF system - use vm_acquire()/vm_release() for VOSF buffers and hope the_buffer is allocated above RAM address space (temporary workaround for 64-bit addressing systems) - don't free() screen buffers in driver_base dtor - don't free() memory mapped buffers in driver_base dtor
This commit is contained in:
gbeauche
parent
054e33c8fc
commit
8d733ed691
@ -35,19 +35,16 @@
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// Variables for Video on SEGV support
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static uint8 *the_host_buffer; // Host frame buffer in VOSF mode
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static uint32 the_buffer_size; // Size of allocated the_buffer
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struct ScreenPageInfo {
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int top, bottom; // Mapping between this virtual page and Mac scanlines
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};
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struct ScreenInfo {
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uintptr memBase; // Real start address
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uintptr memStart; // Start address aligned to page boundary
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uintptr memEnd; // Address of one-past-the-end of the screen
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uint32 memLength; // Length of the memory addressed by the screen pages
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uint32 pageSize; // Size of a page
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uintptr pageSize; // Size of a page
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int pageBits; // Shift count to get the page number
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uint32 pageCount; // Number of pages allocated to the screen
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@ -161,104 +158,118 @@ static uint32 page_extend(uint32 size)
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/*
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* Initialize mainBuffer structure
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* Initialize the VOSF system (mainBuffer structure, SIGSEGV handler)
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*/
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static bool video_init_buffer(void)
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static bool screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction);
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static bool video_vosf_init(void)
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{
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if (use_vosf) {
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const uint32 page_size = getpagesize();
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const uint32 page_mask = page_size - 1;
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const uintptr page_size = getpagesize();
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const uintptr page_mask = page_size - 1;
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// Round up frame buffer base to page boundary
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mainBuffer.memStart = (((uintptr) the_buffer) + page_mask) & ~page_mask;
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// The frame buffer size shall already be aligned to page boundary (use page_extend)
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mainBuffer.memLength = the_buffer_size;
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mainBuffer.pageSize = page_size;
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mainBuffer.pageBits = log_base_2(mainBuffer.pageSize);
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mainBuffer.pageCount = (mainBuffer.memLength + page_mask)/mainBuffer.pageSize;
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// The "2" more bytes requested are a safety net to insure the
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// loops in the update routines will terminate.
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// See "How can we deal with array overrun conditions ?" hereunder for further details.
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mainBuffer.dirtyPages = (char *) vm_acquire(mainBuffer.pageCount + 2);
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if (mainBuffer.dirtyPages == VM_MAP_FAILED)
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return false;
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mainBuffer.memBase = (uintptr) the_buffer;
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// Round up frame buffer base to page boundary
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mainBuffer.memStart = (uintptr)((((unsigned long) the_buffer) + page_mask) & ~page_mask);
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mainBuffer.memLength = the_buffer_size;
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mainBuffer.memEnd = mainBuffer.memStart + mainBuffer.memLength;
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PFLAG_CLEAR_ALL;
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PFLAG_CLEAR(mainBuffer.pageCount);
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PFLAG_SET(mainBuffer.pageCount+1);
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// Allocate and fill in pageInfo with start and end (inclusive) row in number of bytes
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mainBuffer.pageInfo = (ScreenPageInfo *) vm_acquire(mainBuffer.pageCount * sizeof(ScreenPageInfo));
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if (mainBuffer.pageInfo == VM_MAP_FAILED)
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return false;
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uint32 a = 0;
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for (int i = 0; i < mainBuffer.pageCount; i++) {
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int y1 = a / VideoMonitor.mode.bytes_per_row;
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if (y1 >= VideoMonitor.mode.y)
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y1 = VideoMonitor.mode.y - 1;
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mainBuffer.pageSize = page_size;
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mainBuffer.pageCount = (mainBuffer.memLength + page_mask)/mainBuffer.pageSize;
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mainBuffer.pageBits = log_base_2(mainBuffer.pageSize);
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int y2 = (a + mainBuffer.pageSize) / VideoMonitor.mode.bytes_per_row;
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if (y2 >= VideoMonitor.mode.y)
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y2 = VideoMonitor.mode.y - 1;
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if (mainBuffer.dirtyPages) {
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free(mainBuffer.dirtyPages);
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mainBuffer.dirtyPages = NULL;
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}
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mainBuffer.pageInfo[i].top = y1;
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mainBuffer.pageInfo[i].bottom = y2;
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mainBuffer.dirtyPages = (char *) malloc(mainBuffer.pageCount + 2);
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if (mainBuffer.pageInfo) {
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free(mainBuffer.pageInfo);
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mainBuffer.pageInfo = NULL;
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}
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mainBuffer.pageInfo = (ScreenPageInfo *) malloc(mainBuffer.pageCount * sizeof(ScreenPageInfo));
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if ((mainBuffer.dirtyPages == NULL) || (mainBuffer.pageInfo == NULL))
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return false;
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mainBuffer.dirty = false;
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PFLAG_CLEAR_ALL;
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// Safety net to insure the loops in the update routines will terminate
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// See "How can we deal with array overrun conditions ?" hereunder for further details
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PFLAG_CLEAR(mainBuffer.pageCount);
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PFLAG_SET(mainBuffer.pageCount+1);
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uint32 a = 0;
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for (int i = 0; i < mainBuffer.pageCount; i++) {
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int y1 = a / VideoMonitor.mode.bytes_per_row;
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if (y1 >= VideoMonitor.mode.y)
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y1 = VideoMonitor.mode.y - 1;
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int y2 = (a + mainBuffer.pageSize) / VideoMonitor.mode.bytes_per_row;
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if (y2 >= VideoMonitor.mode.y)
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y2 = VideoMonitor.mode.y - 1;
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mainBuffer.pageInfo[i].top = y1;
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mainBuffer.pageInfo[i].bottom = y2;
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a += mainBuffer.pageSize;
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if (a > mainBuffer.memLength)
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a = mainBuffer.memLength;
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}
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// We can now write-protect the frame buffer
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if (vm_protect((char *)mainBuffer.memStart, mainBuffer.memLength, VM_PAGE_READ) != 0)
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return false;
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a += mainBuffer.pageSize;
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if (a > mainBuffer.memLength)
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a = mainBuffer.memLength;
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}
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// We can now write-protect the frame buffer
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if (vm_protect((char *)mainBuffer.memStart, mainBuffer.memLength, VM_PAGE_READ) != 0)
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return false;
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// Initialize the handler for SIGSEGV
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if (!sigsegv_install_handler(screen_fault_handler))
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return false;
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// The frame buffer is sane, i.e. there is no write to it yet
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mainBuffer.dirty = false;
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return true;
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}
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/*
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* Deinitialize VOSF system
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*/
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static void video_vosf_exit(void)
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{
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if (mainBuffer.pageInfo != VM_MAP_FAILED) {
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vm_release(mainBuffer.pageInfo, mainBuffer.pageCount * sizeof(ScreenPageInfo));
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mainBuffer.pageInfo = (ScreenPageInfo *) VM_MAP_FAILED;
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}
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if (mainBuffer.dirtyPages != VM_MAP_FAILED) {
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vm_release(mainBuffer.dirtyPages, mainBuffer.pageCount + 2);
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mainBuffer.dirtyPages = (char *) VM_MAP_FAILED;
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}
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}
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/*
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* Screen fault handler
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*/
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static bool screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
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{
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// D(bug("screen_fault_handler: ADDR=0x%08X from IP=0x%08X\n", fault_address, fault_instruction));
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// D(bug("screen_fault_handler: ADDR=%p from IP=%p\n", fault_address, fault_instruction));
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const uintptr addr = (uintptr)fault_address;
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/* Someone attempted to write to the frame buffer. Make it writeable
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* now so that the data could actually be written to. It will be made
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* read-only back in one of the screen update_*() functions.
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*/
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if ((addr >= mainBuffer.memStart) && (addr < mainBuffer.memEnd)) {
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const int page = (addr - mainBuffer.memStart) >> mainBuffer.pageBits;
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caddr_t page_ad = (caddr_t)(addr & -mainBuffer.pageSize);
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if (((uintptr)addr - mainBuffer.memStart) < mainBuffer.memLength) {
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const int page = ((uintptr)addr - mainBuffer.memStart) >> mainBuffer.pageBits;
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LOCK_VOSF;
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PFLAG_SET(page);
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vm_protect((char *)page_ad, mainBuffer.pageSize, VM_PAGE_READ | VM_PAGE_WRITE);
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vm_protect((char *)(addr & -mainBuffer.pageSize), mainBuffer.pageSize, VM_PAGE_READ | VM_PAGE_WRITE);
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mainBuffer.dirty = true;
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UNLOCK_VOSF;
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return true;
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}
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/* Otherwise, we don't know how to handle the fault, let it crash */
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fprintf(stderr, "do_handle_screen_fault: unhandled address 0x%08X", addr);
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fprintf(stderr, "do_handle_screen_fault: unhandled address %p", fault_address);
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if (fault_instruction != SIGSEGV_INVALID_PC)
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fprintf(stderr, " [IP=0x%08X]", fault_instruction);
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fprintf(stderr, " [IP=%p]", fault_instruction);
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fprintf(stderr, "\n");
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#if EMULATED_68K
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uaecptr nextpc;
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@ -93,6 +93,7 @@ static int display_type = DISPLAY_WINDOW; // See enum above
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static bool local_X11; // Flag: X server running on local machine?
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static uint8 *the_buffer = NULL; // Mac frame buffer (where MacOS draws into)
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static uint8 *the_buffer_copy = NULL; // Copy of Mac frame buffer (for refreshed modes)
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static uint32 the_buffer_size; // Size of allocated the_buffer
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static bool redraw_thread_active = false; // Flag: Redraw thread installed
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#ifdef HAVE_PTHREADS
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@ -509,12 +510,12 @@ driver_base::~driver_base()
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free(the_host_buffer);
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the_host_buffer = NULL;
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}
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if (the_buffer != (uint8 *)VM_MAP_FAILED) {
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vm_release(the_buffer, the_buffer_size);
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if (the_buffer) {
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free(the_buffer);
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the_buffer = NULL;
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}
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if (the_buffer_copy != (uint8 *)VM_MAP_FAILED) {
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vm_release(the_buffer_copy, the_buffer_size);
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if (the_buffer_copy) {
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free(the_buffer_copy);
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the_buffer_copy = NULL;
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}
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}
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@ -629,6 +630,7 @@ driver_window::driver_window(const video_mode &mode)
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}
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#ifdef ENABLE_VOSF
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use_vosf = true;
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// Allocate memory for frame buffer (SIZE is extended to page-boundary)
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the_host_buffer = the_buffer_copy;
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the_buffer_size = page_extend((aligned_height + 2) * img->bytes_per_line);
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@ -682,6 +684,19 @@ driver_window::~driver_window()
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the_buffer_copy = NULL; // don't free() in driver_base dtor
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#endif
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}
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#ifdef ENABLE_VOSF
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if (use_vosf) {
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// don't free() memory mapped buffers in driver_base dtor
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if (the_buffer != VM_MAP_FAILED) {
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vm_release(the_buffer, the_buffer_size);
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the_buffer = NULL;
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}
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if (the_buffer_copy != VM_MAP_FAILED) {
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vm_release(the_buffer_copy, the_buffer_size);
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the_buffer_copy = NULL;
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}
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}
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#endif
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if (img)
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XDestroyImage(img);
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if (have_shm) {
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@ -1001,8 +1016,9 @@ driver_fbdev::driver_fbdev(const video_mode &mode)
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int bytes_per_row = TrivialBytesPerRow(mode.x, mode.depth);
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// Map frame buffer
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if ((the_buffer = (uint8 *) mmap(NULL, height * bytes_per_row, PROT_READ | PROT_WRITE, MAP_PRIVATE, fbdev_fd, fb_offset)) == MAP_FAILED) {
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if ((the_buffer = (uint8 *) mmap(NULL, height * bytes_per_row, PROT_READ | PROT_WRITE, MAP_SHARED, fbdev_fd, fb_offset)) == MAP_FAILED) {
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the_buffer_size = height * bytes_per_row;
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if ((the_buffer = (uint8 *) mmap(NULL, the_buffer_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fbdev_fd, fb_offset)) == MAP_FAILED) {
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if ((the_buffer = (uint8 *) mmap(NULL, the_buffer_size, PROT_READ | PROT_WRITE, MAP_SHARED, fbdev_fd, fb_offset)) == MAP_FAILED) {
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char str[256];
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sprintf(str, GetString(STR_FBDEV_MMAP_ERR), strerror(errno));
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ErrorAlert(str);
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@ -1041,6 +1057,30 @@ driver_fbdev::driver_fbdev(const video_mode &mode)
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// Close display
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driver_fbdev::~driver_fbdev()
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{
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if (!use_vosf) {
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if (the_buffer != MAP_FAILED) {
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// don't free() the screen buffer in driver_base dtor
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munmap(the_buffer, the_buffer_size);
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the_buffer = NULL;
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}
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}
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#ifdef ENABLE_VOSF
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else {
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if (the_host_buffer != MAP_FAILED) {
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// don't free() the screen buffer in driver_base dtor
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munmap(the_host_buffer, the_buffer_size);
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the_host_buffer = NULL;
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}
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if (the_buffer_copy != VM_MAP_FAILED) {
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vm_release(the_buffer_copy, the_buffer_size);
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the_buffer_copy = NULL;
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}
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if (the_buffer != VM_MAP_FAILED) {
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vm_release(the_buffer, the_buffer_size);
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the_buffer = NULL;
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}
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}
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#endif
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}
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#endif
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@ -1126,7 +1166,7 @@ driver_xf86dga::driver_xf86dga(const video_mode &mode)
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// Init blitting routines
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int bytes_per_row = TrivialBytesPerRow((v_width + 7) & ~7, mode.depth);
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#ifdef VIDEO_VOSF
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#if VIDEO_VOSF
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#if REAL_ADDRESSING || DIRECT_ADDRESSING
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// Screen_blitter_init() returns TRUE if VOSF is mandatory
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// i.e. the framebuffer update function is not Blit_Copy_Raw
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@ -1157,6 +1197,25 @@ driver_xf86dga::driver_xf86dga(const video_mode &mode)
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driver_xf86dga::~driver_xf86dga()
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{
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XF86DGADirectVideo(x_display, screen, 0);
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if (!use_vosf) {
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// don't free() the screen buffer in driver_base dtor
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the_buffer = NULL;
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}
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#ifdef ENABLE_VOSF
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else {
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// don't free() the screen buffer in driver_base dtor
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the_host_buffer = NULL;
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if (the_buffer_copy != VM_MAP_FAILED) {
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vm_release(the_buffer_copy, the_buffer_size);
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the_buffer_copy = NULL;
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}
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if (the_buffer != VM_MAP_FAILED) {
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vm_release(the_buffer, the_buffer_size);
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the_buffer = NULL;
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}
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}
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#endif
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#ifdef ENABLE_XF86_VIDMODE
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if (has_vidmode)
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XF86VidModeSwitchToMode(x_display, screen, x_video_modes[0]);
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@ -1343,17 +1402,11 @@ static bool video_open(const video_mode &mode)
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#ifdef ENABLE_VOSF
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if (use_vosf) {
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// Initialize the mainBuffer structure
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if (!video_init_buffer()) {
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// Initialize the VOSF system
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if (!video_vosf_init()) {
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ErrorAlert(STR_VOSF_INIT_ERR);
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return false;
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}
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// Initialize the handler for SIGSEGV
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if (!sigsegv_install_handler(screen_fault_handler)) {
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ErrorAlert("Could not initialize Video on SEGV signals");
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return false;
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}
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}
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#endif
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@ -1569,16 +1622,9 @@ static void video_close(void)
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XSync(x_display, false);
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#ifdef ENABLE_VOSF
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// Deinitialize VOSF
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if (use_vosf) {
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if (mainBuffer.pageInfo) {
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free(mainBuffer.pageInfo);
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mainBuffer.pageInfo = NULL;
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}
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if (mainBuffer.dirtyPages) {
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free(mainBuffer.dirtyPages);
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mainBuffer.dirtyPages = NULL;
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}
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// Deinitialize VOSF
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video_vosf_exit();
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}
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#endif
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Block a user