| 28 |
|
* Page-aligned memory allocation |
| 29 |
|
*/ |
| 30 |
|
|
| 31 |
< |
// Align on page boundaries |
| 32 |
< |
static uintptr align_on_page_boundary(uintptr size) |
| 31 |
> |
// Extend size to page boundary |
| 32 |
> |
static uint32 page_extend(uint32 size) |
| 33 |
|
{ |
| 34 |
|
const uint32 page_size = getpagesize(); |
| 35 |
|
const uint32 page_mask = page_size - 1; |
| 36 |
|
return (size + page_mask) & ~page_mask; |
| 37 |
|
} |
| 38 |
|
|
| 39 |
< |
// Allocate memory on page boundary |
| 40 |
< |
static void * allocate_framebuffer(uint32 size, uint8 * hint = 0) |
| 41 |
< |
{ |
| 42 |
< |
// Remind that the system can allocate at 0x00000000... |
| 43 |
< |
return mmap((caddr_t)hint, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, zero_fd, 0); |
| 44 |
< |
} |
| 45 |
< |
|
| 46 |
< |
|
| 47 |
< |
/* |
| 48 |
< |
* Screen fault handler |
| 49 |
< |
*/ |
| 50 |
< |
|
| 51 |
< |
const uintptr INVALID_PC = (uintptr)-1; |
| 52 |
< |
|
| 53 |
< |
static inline void do_handle_screen_fault(uintptr addr, uintptr pc = INVALID_PC) |
| 39 |
> |
// Screen fault handler |
| 40 |
> |
static bool screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction) |
| 41 |
|
{ |
| 42 |
+ |
D(bug("screen_fault_handler: ADDR=0x%08X from IP=0x%08X\n", fault_address, fault_instruction)); |
| 43 |
+ |
const uintptr addr = (uintptr)fault_address; |
| 44 |
+ |
|
| 45 |
|
/* Someone attempted to write to the frame buffer. Make it writeable |
| 46 |
|
* now so that the data could actually be written. It will be made |
| 47 |
|
* read-only back in one of the screen update_*() functions. |
| 48 |
|
*/ |
| 49 |
|
if ((addr >= mainBuffer.memStart) && (addr < mainBuffer.memEnd)) { |
| 50 |
|
const int page = (addr - mainBuffer.memStart) >> mainBuffer.pageBits; |
| 51 |
< |
caddr_t page_ad = (caddr_t)(addr & ~(mainBuffer.pageSize - 1)); |
| 51 |
> |
caddr_t page_ad = (caddr_t)(addr & -mainBuffer.pageSize); |
| 52 |
|
LOCK_VOSF; |
| 53 |
|
PFLAG_SET(page); |
| 54 |
< |
mprotect(page_ad, mainBuffer.pageSize, PROT_READ | PROT_WRITE); |
| 54 |
> |
vm_protect((char *)page_ad, mainBuffer.pageSize, VM_PAGE_READ | VM_PAGE_WRITE); |
| 55 |
|
mainBuffer.dirty = true; |
| 56 |
|
UNLOCK_VOSF; |
| 57 |
< |
return; |
| 57 |
> |
return true; |
| 58 |
|
} |
| 59 |
|
|
| 60 |
|
/* Otherwise, we don't know how to handle the fault, let it crash */ |
| 61 |
|
fprintf(stderr, "do_handle_screen_fault: unhandled address 0x%08X", addr); |
| 62 |
< |
if (pc != INVALID_PC) |
| 63 |
< |
fprintf(stderr, " [IP=0x%08X]", pc); |
| 62 |
> |
if (fault_instruction != SIGSEGV_INVALID_PC) |
| 63 |
> |
fprintf(stderr, " [IP=0x%08X]", fault_instruction); |
| 64 |
|
fprintf(stderr, "\n"); |
| 65 |
< |
|
| 76 |
< |
signal(SIGSEGV, SIG_DFL); |
| 77 |
< |
} |
| 78 |
< |
|
| 79 |
< |
#if defined(HAVE_SIGINFO_T) |
| 80 |
< |
|
| 81 |
< |
static void Screen_fault_handler(int, siginfo_t * sip, void *) |
| 82 |
< |
{ |
| 83 |
< |
D(bug("Screen_fault_handler: ADDR=0x%08X\n", sip->si_addr)); |
| 84 |
< |
do_handle_screen_fault((uintptr)sip->si_addr); |
| 85 |
< |
} |
| 86 |
< |
|
| 87 |
< |
#elif defined(HAVE_SIGCONTEXT_SUBTERFUGE) |
| 88 |
< |
|
| 89 |
< |
# if defined(__i386__) && defined(__linux__) |
| 90 |
< |
static void Screen_fault_handler(int, struct sigcontext scs) |
| 91 |
< |
{ |
| 92 |
< |
D(bug("Screen_fault_handler: ADDR=0x%08X from IP=0x%08X\n", scs.cr2, scs.eip)); |
| 93 |
< |
do_handle_screen_fault((uintptr)scs.cr2, (uintptr)scs.eip); |
| 94 |
< |
} |
| 95 |
< |
|
| 96 |
< |
# elif defined(__m68k__) && defined(__NetBSD__) |
| 97 |
< |
|
| 98 |
< |
# include <m68k/frame.h> |
| 99 |
< |
static void Screen_fault_handler(int, int code, struct sigcontext *scp) |
| 100 |
< |
{ |
| 101 |
< |
D(bug("Screen_fault_handler: ADDR=0x%08X\n", code)); |
| 102 |
< |
struct sigstate { |
| 103 |
< |
int ss_flags; |
| 104 |
< |
struct frame ss_frame; |
| 105 |
< |
}; |
| 106 |
< |
struct sigstate *state = (struct sigstate *)scp->sc_ap; |
| 107 |
< |
uintptr fault_addr; |
| 108 |
< |
switch (state->ss_frame.f_format) { |
| 109 |
< |
case 7: // 68040 access error |
| 110 |
< |
// "code" is sometimes unreliable (i.e. contains NULL or a bogus address), reason unknown |
| 111 |
< |
fault_addr = state->ss_frame.f_fmt7.f_fa; |
| 112 |
< |
break; |
| 113 |
< |
default: |
| 114 |
< |
fault_addr = (uintptr)code; |
| 115 |
< |
break; |
| 116 |
< |
} |
| 117 |
< |
do_handle_screen_fault(fault_addr); |
| 118 |
< |
} |
| 119 |
< |
|
| 120 |
< |
# elif defined(__powerpc__) && defined(__linux__) |
| 121 |
< |
|
| 122 |
< |
static void Screen_fault_handler(int, struct sigcontext_struct *scs) |
| 123 |
< |
{ |
| 124 |
< |
D(bug("Screen_fault_handler: ADDR=0x%08X from IP=0x%08X\n", scs->regs->dar, scs->regs->nip)); |
| 125 |
< |
do_handle_screen_fault((uintptr)scs->regs->dar, (uintptr)scs->regs->nip); |
| 126 |
< |
} |
| 127 |
< |
|
| 128 |
< |
# else |
| 129 |
< |
# error "No suitable subterfuge for Video on SEGV signals" |
| 130 |
< |
# endif |
| 131 |
< |
#else |
| 132 |
< |
# error "Can't do Video on SEGV signals" |
| 133 |
< |
#endif |
| 134 |
< |
|
| 135 |
< |
|
| 136 |
< |
/* |
| 137 |
< |
* Screen fault handler initialization |
| 138 |
< |
*/ |
| 139 |
< |
|
| 140 |
< |
#if defined(HAVE_SIGINFO_T) |
| 141 |
< |
static bool Screen_fault_handler_init() |
| 142 |
< |
{ |
| 143 |
< |
// Setup SIGSEGV handler to process writes to frame buffer |
| 144 |
< |
sigemptyset(&vosf_sa.sa_mask); |
| 145 |
< |
vosf_sa.sa_sigaction = Screen_fault_handler; |
| 146 |
< |
vosf_sa.sa_flags = SA_SIGINFO; |
| 147 |
< |
return (sigaction(SIGSEGV, &vosf_sa, NULL) == 0); |
| 65 |
> |
return false; |
| 66 |
|
} |
| 149 |
– |
#elif defined(HAVE_SIGCONTEXT_SUBTERFUGE) |
| 150 |
– |
static bool Screen_fault_handler_init() |
| 151 |
– |
{ |
| 152 |
– |
// Setup SIGSEGV handler to process writes to frame buffer |
| 153 |
– |
sigemptyset(&vosf_sa.sa_mask); |
| 154 |
– |
vosf_sa.sa_handler = (void (*)(int)) Screen_fault_handler; |
| 155 |
– |
#if !EMULATED_68K && defined(__NetBSD__) |
| 156 |
– |
sigaddset(&vosf_sa.sa_mask, SIGALRM); |
| 157 |
– |
vosf_sa.sa_flags = SA_ONSTACK; |
| 158 |
– |
#else |
| 159 |
– |
vosf_sa.sa_flags = 0; |
| 160 |
– |
#endif |
| 161 |
– |
return (sigaction(SIGSEGV, &vosf_sa, NULL) == 0); |
| 162 |
– |
} |
| 163 |
– |
#endif |
| 164 |
– |
|
| 67 |
|
|
| 68 |
|
/* |
| 69 |
|
* Update display for Windowed mode and VOSF |
| 120 |
|
// Make the dirty pages read-only again |
| 121 |
|
const int32 offset = first_page << mainBuffer.pageBits; |
| 122 |
|
const uint32 length = (page - first_page) << mainBuffer.pageBits; |
| 123 |
< |
mprotect((caddr_t)(mainBuffer.memStart + offset), length, PROT_READ); |
| 123 |
> |
vm_protect((char *)mainBuffer.memStart + offset, length, VM_PAGE_READ); |
| 124 |
|
|
| 125 |
|
// There is at least one line to update |
| 126 |
|
const int y1 = mainBuffer.pageInfo[first_page].top; |
| 178 |
|
// Make the dirty pages read-only again |
| 179 |
|
const int32 offset = first_page << mainBuffer.pageBits; |
| 180 |
|
const uint32 length = (page - first_page) << mainBuffer.pageBits; |
| 181 |
< |
mprotect((caddr_t)(mainBuffer.memStart + offset), length, PROT_READ); |
| 181 |
> |
vm_protect((char *)mainBuffer.memStart + offset, length, VM_PAGE_READ); |
| 182 |
|
|
| 183 |
|
// I am sure that y2 >= y1 and depth != 1 |
| 184 |
|
const int y1 = mainBuffer.pageInfo[first_page].top; |
