| 221 |
|
#define SIGSEGV_FAULT_HANDLER_ARGLIST_1 siginfo_t *sip, void *scp |
| 222 |
|
#define SIGSEGV_FAULT_HANDLER_ARGS sip, scp |
| 223 |
|
#define SIGSEGV_FAULT_ADDRESS sip->si_addr |
| 224 |
+ |
#if defined(__sun__) |
| 225 |
+ |
#if (defined(sparc) || defined(__sparc__)) |
| 226 |
+ |
#include <sys/ucontext.h> |
| 227 |
+ |
#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.gregs) |
| 228 |
+ |
#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[REG_PC] |
| 229 |
+ |
#endif |
| 230 |
+ |
#endif |
| 231 |
|
#if defined(__NetBSD__) || defined(__FreeBSD__) |
| 232 |
|
#if (defined(i386) || defined(__i386__)) |
| 233 |
|
#define SIGSEGV_FAULT_INSTRUCTION (((struct sigcontext *)scp)->sc_eip) |
| 1199 |
|
#include <sys/mman.h> |
| 1200 |
|
#include "vm_alloc.h" |
| 1201 |
|
|
| 1202 |
+ |
const int REF_INDEX = 123; |
| 1203 |
+ |
const int REF_VALUE = 45; |
| 1204 |
+ |
|
| 1205 |
|
static int page_size; |
| 1206 |
|
static volatile char * page = 0; |
| 1207 |
|
static volatile int handler_called = 0; |
| 1208 |
|
|
| 1209 |
+ |
#ifdef __GNUC__ |
| 1210 |
+ |
// Code range where we expect the fault to come from |
| 1211 |
+ |
static void *b_region, *e_region; |
| 1212 |
+ |
#endif |
| 1213 |
+ |
|
| 1214 |
|
static sigsegv_return_t sigsegv_test_handler(sigsegv_address_t fault_address, sigsegv_address_t instruction_address) |
| 1215 |
|
{ |
| 1216 |
|
handler_called++; |
| 1217 |
< |
if ((fault_address - 123) != page) |
| 1217 |
> |
if ((fault_address - REF_INDEX) != page) |
| 1218 |
|
exit(10); |
| 1219 |
< |
if (vm_protect((char *)((unsigned long)fault_address & -page_size), page_size, VM_PAGE_READ | VM_PAGE_WRITE) != 0) |
| 1219 |
> |
#ifdef __GNUC__ |
| 1220 |
> |
// Make sure reported fault instruction address falls into |
| 1221 |
> |
// expected code range |
| 1222 |
> |
if (instruction_address != SIGSEGV_INVALID_PC |
| 1223 |
> |
&& ((instruction_address < (sigsegv_address_t)b_region) || |
| 1224 |
> |
(instruction_address >= (sigsegv_address_t)e_region))) |
| 1225 |
|
exit(11); |
| 1226 |
+ |
#endif |
| 1227 |
+ |
if (vm_protect((char *)((unsigned long)fault_address & -page_size), page_size, VM_PAGE_READ | VM_PAGE_WRITE) != 0) |
| 1228 |
+ |
exit(12); |
| 1229 |
|
return SIGSEGV_RETURN_SUCCESS; |
| 1230 |
|
} |
| 1231 |
|
|
| 1232 |
|
#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION |
| 1210 |
– |
#ifdef __GNUC__ |
| 1211 |
– |
// Code range where we expect the fault to come from |
| 1212 |
– |
static void *b_region, *e_region; |
| 1213 |
– |
#endif |
| 1214 |
– |
|
| 1233 |
|
static sigsegv_return_t sigsegv_insn_handler(sigsegv_address_t fault_address, sigsegv_address_t instruction_address) |
| 1234 |
|
{ |
| 1235 |
|
if (((unsigned long)fault_address - (unsigned long)page) < page_size) { |
| 1257 |
|
if ((page = (char *)vm_acquire(page_size)) == VM_MAP_FAILED) |
| 1258 |
|
return 2; |
| 1259 |
|
|
| 1260 |
+ |
memset((void *)page, 0, page_size); |
| 1261 |
|
if (vm_protect((char *)page, page_size, VM_PAGE_READ) < 0) |
| 1262 |
|
return 3; |
| 1263 |
|
|
| 1264 |
|
if (!sigsegv_install_handler(sigsegv_test_handler)) |
| 1265 |
|
return 4; |
| 1266 |
|
|
| 1267 |
< |
page[123] = 45; |
| 1268 |
< |
page[123] = 45; |
| 1269 |
< |
|
| 1267 |
> |
#ifdef __GNUC__ |
| 1268 |
> |
b_region = &&L_b_region1; |
| 1269 |
> |
e_region = &&L_e_region1; |
| 1270 |
> |
#endif |
| 1271 |
> |
L_b_region1: |
| 1272 |
> |
page[REF_INDEX] = REF_VALUE; |
| 1273 |
> |
if (page[REF_INDEX] != REF_VALUE) |
| 1274 |
> |
exit(20); |
| 1275 |
> |
page[REF_INDEX] = REF_VALUE; |
| 1276 |
> |
L_e_region1: |
| 1277 |
> |
|
| 1278 |
|
if (handler_called != 1) |
| 1279 |
|
return 5; |
| 1280 |
|
|
| 1300 |
|
} while (0) |
| 1301 |
|
|
| 1302 |
|
#ifdef __GNUC__ |
| 1303 |
< |
b_region = &&L_b_region; |
| 1304 |
< |
e_region = &&L_e_region; |
| 1303 |
> |
b_region = &&L_b_region2; |
| 1304 |
> |
e_region = &&L_e_region2; |
| 1305 |
|
#endif |
| 1306 |
< |
L_b_region: |
| 1306 |
> |
L_b_region2: |
| 1307 |
|
TEST_SKIP_INSTRUCTION(unsigned char); |
| 1308 |
|
TEST_SKIP_INSTRUCTION(unsigned short); |
| 1309 |
|
TEST_SKIP_INSTRUCTION(unsigned int); |
| 1310 |
< |
L_e_region: |
| 1310 |
> |
L_e_region2: |
| 1311 |
|
#endif |
| 1312 |
|
|
| 1313 |
|
vm_exit(); |
| 1314 |
|
return 0; |
| 1315 |
|
} |
| 1316 |
|
#endif |
| 1317 |
+ |
|
| 1318 |
+ |
|
| 1319 |
+ |
|
| 1320 |
+ |
|
| 1321 |
+ |
|
| 1322 |
+ |
|
| 1323 |
+ |
|
| 1324 |
+ |
|
| 1325 |
+ |
|
| 1326 |
+ |
|
| 1327 |
+ |
|
| 1328 |
+ |
|
| 1329 |
+ |
|
| 1330 |
+ |
|
| 1331 |
+ |
|
