| 177 |
|
|
| 178 |
|
// Make sure the SIGSEGV handler can access CPU registers |
| 179 |
|
friend sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t); |
| 180 |
– |
|
| 181 |
– |
// Memory allocator returning areas aligned on 16-byte boundaries |
| 182 |
– |
void *operator new(size_t size); |
| 183 |
– |
void operator delete(void *p); |
| 180 |
|
}; |
| 181 |
|
|
| 186 |
– |
// Memory allocator returning sheepshaver_cpu objects aligned on 16-byte boundaries |
| 187 |
– |
// FORMAT: [ alignment ] magic identifier, offset to malloc'ed data, sheepshaver_cpu data |
| 188 |
– |
void *sheepshaver_cpu::operator new(size_t size) |
| 189 |
– |
{ |
| 190 |
– |
const int ALIGN = 16; |
| 191 |
– |
|
| 192 |
– |
// Allocate enough space for sheepshaver_cpu data + signature + align pad |
| 193 |
– |
uint8 *ptr = (uint8 *)malloc(size + ALIGN * 2); |
| 194 |
– |
if (ptr == NULL) |
| 195 |
– |
throw std::bad_alloc(); |
| 196 |
– |
|
| 197 |
– |
// Align memory |
| 198 |
– |
int ofs = 0; |
| 199 |
– |
while ((((uintptr)ptr) % ALIGN) != 0) |
| 200 |
– |
ofs++, ptr++; |
| 201 |
– |
|
| 202 |
– |
// Insert signature and offset |
| 203 |
– |
struct aligned_block_t { |
| 204 |
– |
uint32 pad[(ALIGN - 8) / 4]; |
| 205 |
– |
uint32 signature; |
| 206 |
– |
uint32 offset; |
| 207 |
– |
uint8 data[sizeof(sheepshaver_cpu)]; |
| 208 |
– |
}; |
| 209 |
– |
aligned_block_t *blk = (aligned_block_t *)ptr; |
| 210 |
– |
blk->signature = FOURCC('S','C','P','U'); |
| 211 |
– |
blk->offset = ofs + (&blk->data[0] - (uint8 *)blk); |
| 212 |
– |
assert((((uintptr)&blk->data) % ALIGN) == 0); |
| 213 |
– |
return &blk->data[0]; |
| 214 |
– |
} |
| 215 |
– |
|
| 216 |
– |
void sheepshaver_cpu::operator delete(void *p) |
| 217 |
– |
{ |
| 218 |
– |
uint32 *blk = (uint32 *)p; |
| 219 |
– |
assert(blk[-2] == FOURCC('S','C','P','U')); |
| 220 |
– |
void *ptr = (void *)(((uintptr)p) - blk[-1]); |
| 221 |
– |
free(ptr); |
| 222 |
– |
} |
| 223 |
– |
|
| 182 |
|
sheepshaver_cpu::sheepshaver_cpu() |
| 183 |
|
: powerpc_cpu(enable_jit_p()) |
| 184 |
|
{ |
| 826 |
|
#endif |
| 827 |
|
|
| 828 |
|
delete ppc_cpu; |
| 829 |
+ |
ppc_cpu = NULL; |
| 830 |
|
} |
| 831 |
|
|
| 832 |
|
#if PPC_ENABLE_JIT && PPC_REENTRANT_JIT |
