2255 for (int i = 0; exceptlabels[i].name != NULL; i++) {
2256 if (exceptlabels[i].number == exception_code) {
2257 jio_snprintf(buf, size, "%s", exceptlabels[i].name);
2258 return buf;
2259 }
2260 }
2261
2262 return NULL;
2263 }
2264
2265 //-----------------------------------------------------------------------------
2266 LONG Handle_IDiv_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) {
2267 // handle exception caused by idiv; should only happen for -MinInt/-1
2268 // (division by zero is handled explicitly)
2269 #ifdef _M_IA64
2270 assert(0, "Fix Handle_IDiv_Exception");
2271 #else
2272 #ifdef _M_AMD64
2273 PCONTEXT ctx = exceptionInfo->ContextRecord;
2274 address pc = (address)ctx->Rip;
2275 assert(pc[0] == 0xF7, "not an idiv opcode");
2276 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");
2277 assert(ctx->Rax == min_jint, "unexpected idiv exception");
2278 // set correct result values and continue after idiv instruction
2279 ctx->Rip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes
2280 ctx->Rax = (DWORD)min_jint; // result
2281 ctx->Rdx = (DWORD)0; // remainder
2282 // Continue the execution
2283 #else
2284 PCONTEXT ctx = exceptionInfo->ContextRecord;
2285 address pc = (address)ctx->Eip;
2286 assert(pc[0] == 0xF7, "not an idiv opcode");
2287 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");
2288 assert(ctx->Eax == min_jint, "unexpected idiv exception");
2289 // set correct result values and continue after idiv instruction
2290 ctx->Eip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes
2291 ctx->Eax = (DWORD)min_jint; // result
2292 ctx->Edx = (DWORD)0; // remainder
2293 // Continue the execution
2294 #endif
2295 #endif
2296 return EXCEPTION_CONTINUE_EXECUTION;
2297 }
2298
2299 //-----------------------------------------------------------------------------
2300 LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) {
|
2255 for (int i = 0; exceptlabels[i].name != NULL; i++) {
2256 if (exceptlabels[i].number == exception_code) {
2257 jio_snprintf(buf, size, "%s", exceptlabels[i].name);
2258 return buf;
2259 }
2260 }
2261
2262 return NULL;
2263 }
2264
2265 //-----------------------------------------------------------------------------
2266 LONG Handle_IDiv_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) {
2267 // handle exception caused by idiv; should only happen for -MinInt/-1
2268 // (division by zero is handled explicitly)
2269 #ifdef _M_IA64
2270 assert(0, "Fix Handle_IDiv_Exception");
2271 #else
2272 #ifdef _M_AMD64
2273 PCONTEXT ctx = exceptionInfo->ContextRecord;
2274 address pc = (address)ctx->Rip;
2275 assert(pc[0] >= Assembler::REX && pc[0] <= Assembler::REX_WRXB && pc[1] == 0xF7 || pc[0] == 0xF7, "not an idiv opcode");
2276 assert(pc[0] >= Assembler::REX && pc[0] <= Assembler::REX_WRXB && (pc[2] & ~0x7) == 0xF8 || (pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");
2277 if (pc[0] == 0xF7) {
2278 // set correct result values and continue after idiv instruction
2279 ctx->Rip = (DWORD64)pc + 2; // idiv reg, reg is 2 bytes
2280 } else {
2281 ctx->Rip = (DWORD64)pc + 3; // REX idiv reg, reg is 3 bytes
2282 }
2283 // Do not set ctx->Rax as it already contains the correct value (either 32 or 64 bit, depending on the operation)
2284 // this is the case because the exception only happens for -MinValue/-1 and -MinValue is always in rax because of the
2285 // idiv opcode (0xF7).
2286 ctx->Rdx = (DWORD)0; // remainder
2287 // Continue the execution
2288 #else
2289 PCONTEXT ctx = exceptionInfo->ContextRecord;
2290 address pc = (address)ctx->Eip;
2291 assert(pc[0] == 0xF7, "not an idiv opcode");
2292 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");
2293 assert(ctx->Eax == min_jint, "unexpected idiv exception");
2294 // set correct result values and continue after idiv instruction
2295 ctx->Eip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes
2296 ctx->Eax = (DWORD)min_jint; // result
2297 ctx->Edx = (DWORD)0; // remainder
2298 // Continue the execution
2299 #endif
2300 #endif
2301 return EXCEPTION_CONTINUE_EXECUTION;
2302 }
2303
2304 //-----------------------------------------------------------------------------
2305 LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) {
|