Subject: Re: testing with `score' again - msg#00027

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Re: testing with `score' again

[CVS 2003-10-06] > > Running `score.exe' now gives a completely new error message if > > run without `set NO87=NO87': Hehe, a third program of the score suite, draw.exe, produces the segmentation fault below. This program is quite small so I could send it to interested persons. Werner ====================================================================== Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 1024 (LWP 29866)] 0x080e2aae in reg_copy (x=0x811be40, y=0x2) at fpu_emu.h:158 158 y->exp = x->exp; Current language: auto; currently c (gdb) bt full #0 0x080e2aae in reg_copy (x=0x811be40, y=0x2) at fpu_emu.h:158 x = (FPU_REG *) 0x811be40 y = (FPU_REG *) 0x2 #1 0x080e09a7 in FPU_load_int16 (_s=49074, loaded_data=0x2) at reg_ld_str.c:334 s = 0 negative = 4060 #2 0x080e2d33 in FPU_load_store (type=3 '\003', addr_modes= {override = {address_size = 0 '\0', operand_size = 0 '\0', segment = 0 '\0'}, default_mode = 1 '\001'}, data_address=49074) at load_store.c:118 type = 3 '\003' loaded_data = {sigl = 135215840, sigh = 135104448, exp = 971, alignment1 = 2060, alignment2 = 24224, alignment3 = 2070} st0_ptr = (FPU_REG *) 0x8161aec st0_tag = 3 '\003' loaded_tag = 0 '\0' #3 0x080df346 in math_emulate (addr_modes= {override = {address_size = 0 '\0', operand_size = 0 '\0', segment = 0 '\0'}, default_mode = 1 '\001'}, FPU_modrm=70 'F', byte1=223 'ß', data_address=49074, data_sel_off= {offset = 49074, selector = 20135, opcode = 0, empty = 0}, entry_sel_off= {offset = 9798, selector = 2065, opcode = 1862, empty = 0}) at fpu_entry.c:339 FPU_modrm = 70 'F' byte1 = 223 'ß' code = 58976 unmasked = -1073748868 loaded_data = {sigl = 1076963158, sigh = 1076963159, exp = -7012, alignment1 = 49151, alignment2 = 42359, alignment3 = 2056} st0_ptr = (FPU_REG *) 0x8089734 loaded_tag = 191 '¿' st0_tag = 255 'ÿ' #4 0x080de679 in bx_cpu_c::fpu_execute (i=0x81b4968) at wmFPUemu_glue.cc:123 addr_modes = {override = {address_size = 0 '\0', operand_size = 0 '\0', segment = 0 '\0'}, default_mode = 1 '\001'} data_address = 49074 data_sel_off = {offset = 49074, selector = 20135, opcode = 0, empty = 0} entry_sel_off = {offset = 9798, selector = 2065, opcode = 0, empty = 0} is_32 = 0 #5 0x080951c7 in bx_cpu_c::ESC7 (i=0x81b4968) at fpu.cc:134 No locals. #6 0x08088eb3 in bx_cpu_c::cpu_loop (max_instr_count=1) at cpu.cc:304 ret = 1 iStorage = { ResolveModrm = 0x808c9a0 <bx_cpu_c::Resolve16Mod0Rm6(bxInstruction_c *)>, execute = 0x80ae8f0 <bx_cpu_c::TEST_EbIb(bxInstruction_c *)>, metaInfo = 52346882, {modRMForm = {modRMData = 6291462, {Id = 4294967041, Iw = 65281, Ib = 1 '\001'}, {displ16u = 3386, displ32u = 1089932602}}, IxIxForm = {dummy = 6291462, {Id = 4294967041, Iw = 65281, Ib = 1 '\001'}, {Id2 = 1089932602, Iw2 = 3386, Ib2 = 58 ':'}}, IxForm = { opcodeReg = 6291462, {Id = 4294967041, Iw = 65281, Ib = 1 '\001'}, dummy = 1089932602}}} i = (bxInstruction_c *) 0x81b4968 execute = 0x80951b0 <bx_cpu_c::ESC7(bxInstruction_c *)> #7 0x0806f3ca in bx_begin_simulation (argc=1, argv=0xbffff824) at main.cc:2314 No locals. #8 0x080d877a in bx_real_sim_c::begin_simulation (this=0x82bbfe8, argc=1, argv=0xbffff824) at siminterface.cc:751 this = (bx_real_sim_c *) 0x82bbfe8 #9 0x080db357 in bx_config_interface (menu=8) at textconfig.cc:376 prompt = "\0\0\0\0ðÛ,\b\0\0\0\0ìõ\t@$¹\034@ Û,\b\0\0\0\0¸Ú,\b\0\0\0\0PÚ,\bÌæÿ¿$¹\034@$¹\034@À\005\006@\0 \0\0(×,\b\0\0\0\0`Ò,\b\0\0\0\0øÑ,\b\0\0\0\0\002\0\0\0\0\0\0\0 \0\0\0tçÿ¿\t\207\0@\016ù\v@\232\220\003@\0\0\0\0!\204\0@(H\001@xj\0\0øS\001@\027\0\0\0\0\0\002@×\021\n@\001\0\0\0\0\0\002@\0\0\0\0ê\021\n@\0\0\0\0\0\0\0\0_\220\003@®\021\n@ìC\v@!\006\0\0ìd\v@Üá\n@ÀY\001@\a\0\0\0"... floppyop = {Odevtype = 0x82ca130, Opath = 0x82ca900, Otype = 0x82ca9c0, Ostatus = 0x82cb190} cdromop = {Omenu = 0x82cb240, Opresent = 0x82cb2a8, Otype = 0x0, Omode = 0x402f208, Opath = 0x82c0538, Ojournal = 0x82c3690, Ocylinders = 0x82c67e8, Oheads = 0x82c9940, Ospt = 0x82bd698, Ostatus = 0x82c07f0, Omodel = 0x82c3948, Obiosdetect = 0x82c6aa0, Otranslation = 0x90b0f0e} choice = 1 #10 0x080db66a in bx_config_interface (menu=1) at textconfig.cc:412 default_choice = 5 prompt = "\0Å+\b\0Å+\b", '\0' <repeats 16 times>, "Lïÿ¿sÑ\t@\0\225\034@à\220\034@ØA-\b=Ð\t@$¹\034@à\220\034@ØA-\b\0\0\0\0ø\220\034@\0\0\0\0|ïÿ¿»ù\021@ð\224\034@à\220\034@|ïÿ¿£ù\021@\0Å+\b\0Å+\b", '\0' <repeats 16 times>, "lôÿ¿®\a\a\bàA-\b\002\0\0\0Àñÿ¿\230ð\021@\0Å+\b\0Å+\b$øÿ¿dï\021@$¹\034@\001\0\0\0\0\0\0\0\\\227\f@\230\237+\b<I+\b\034ðÿ¿\002\024\030@<I+\bh\233+\b\0t*\bìõ\t@$¹\034@"... floppyop = {Odevtype = 0x401cb924, Opath = 0x82d4370, Otype = 0x82d4370, Ostatus = 0x40098a1f} cdromop = {Omenu = 0x400972d0, Opresent = 0x138, Otype = 0x400b23bc, Omode = 0x40015bb0, Opath = 0xbffff404, Ojournal = 0x40008802, Ocylinders = 0xbffff35c, Oheads = 0x4011c0fb, Ospt = 0x82d4370, Ostatus = 0x40008421, Omodel = 0x40014828, Obiosdetect = 0x4011c0dd, Otranslation = 0x401cb924} choice = 5 #11 0x080dd99d in ci_callback (userdata=0x0, command=CI_START) at textconfig.cc:975 No locals. #12 0x080d8729 in bx_real_sim_c::configuration_interface (this=0x82bbfe8, ignore=0x80f71a2 "textconfig", command=CI_START) at siminterface.cc:743 this = (bx_real_sim_c *) 0x82bbfe8 ci_param = (bx_param_enum_c *) 0x82cdbf0 name = 0x80f71a2 "textconfig" retval = 0 #13 0x0806e6ec in bxmain () at main.cc:1785 ci_param = (bx_param_enum_c *) 0x82cdbf0 ci_name = 0x80f71a2 "textconfig" status = 135524996 context = {{__jmpbuf = {1075624228, 1073827044, -1073743836, -1073743956, -1073743996, 134669797}, __mask_was_saved = 0, __saved_mask = {__val = {0 <repeats 32 times>}}}} #14 0x0806e77b in main (argc=1, argv=0xbffff824) at main.cc:1965 No locals. #15 0x400c87ee in __libc_start_main () from /lib/libc.so.6 No symbol table info available. ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf

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Re: testing with `score' again

--- Werner LEMBERG <wl@xxxxxxx> wrote: > > [CVS 2003-10-06] > > Running `score.exe' now gives a completely new error message if run > without `set NO87=NO87': > > EMM386 has detected error #16 in an application > at memory address 1F77:0C7A. To minimize the chance > of data loss, EMM386 has halted your computer. > For more information, see the README.TXT file. > > To restart your computer, press ENTER. > > Tsk, tsk, tsk :-) > > > Werner > > > ------------------------------------------------------- > This sf.net email is sponsored by:ThinkGeek > Welcome to geek heaven. > http://thinkgeek.com/sf > _______________________________________________ > bochs-developers mailing list > bochs-developers@xxxxxxxxxxxxxxxxxxxxx > https://lists.sourceforge.net/lists/listinfo/bochs-developers One thing that makes score.exe difficult to debug is that the executable is large, and compressed. This kept me from tracing the successful execution with a commercial processor. Score is built with MSC 5, a compiler version that is rare today. Could it be possible that any app that uses floating point and is built with MSC 5 would duplicate the problem? If so, working with a small application built from source code would be easier. Unfortunately, I do not have a copy of MSC 5. But I suspect its fpu emulation arrangement has something to do with the problem. 16-bit DOS fpu emulators typically activate the emulator code with a software interrupt instruction, then self-modify the code to patch in fpu opcodes if an fpu is present. This arrangement allowed an app to include the emutator, but use the hardware fpu if present. Except for the first pass through a peice, execution is at full speed if the fpu is present. __________________________________ Do you Yahoo!? The New Yahoo! Shopping - with improved product search http://shopping.yahoo.com ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf

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Re: testing with `score' again

[CVS 2003-10-06] > > Running `score.exe' now gives a completely new error message if > > run without `set NO87=NO87': Hehe, a third program of the score suite, draw.exe, produces the segmentation fault below. This program is quite small so I could send it to interested persons. Werner ====================================================================== Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 1024 (LWP 29866)] 0x080e2aae in reg_copy (x=0x811be40, y=0x2) at fpu_emu.h:158 158 y->exp = x->exp; Current language: auto; currently c (gdb) bt full #0 0x080e2aae in reg_copy (x=0x811be40, y=0x2) at fpu_emu.h:158 x = (FPU_REG *) 0x811be40 y = (FPU_REG *) 0x2 #1 0x080e09a7 in FPU_load_int16 (_s=49074, loaded_data=0x2) at reg_ld_str.c:334 s = 0 negative = 4060 #2 0x080e2d33 in FPU_load_store (type=3 '\003', addr_modes= {override = {address_size = 0 '\0', operand_size = 0 '\0', segment = 0 '\0'}, default_mode = 1 '\001'}, data_address=49074) at load_store.c:118 type = 3 '\003' loaded_data = {sigl = 135215840, sigh = 135104448, exp = 971, alignment1 = 2060, alignment2 = 24224, alignment3 = 2070} st0_ptr = (FPU_REG *) 0x8161aec st0_tag = 3 '\003' loaded_tag = 0 '\0' #3 0x080df346 in math_emulate (addr_modes= {override = {address_size = 0 '\0', operand_size = 0 '\0', segment = 0 '\0'}, default_mode = 1 '\001'}, FPU_modrm=70 'F', byte1=223 'ß', data_address=49074, data_sel_off= {offset = 49074, selector = 20135, opcode = 0, empty = 0}, entry_sel_off= {offset = 9798, selector = 2065, opcode = 1862, empty = 0}) at fpu_entry.c:339 FPU_modrm = 70 'F' byte1 = 223 'ß' code = 58976 unmasked = -1073748868 loaded_data = {sigl = 1076963158, sigh = 1076963159, exp = -7012, alignment1 = 49151, alignment2 = 42359, alignment3 = 2056} st0_ptr = (FPU_REG *) 0x8089734 loaded_tag = 191 '¿' st0_tag = 255 'ÿ' #4 0x080de679 in bx_cpu_c::fpu_execute (i=0x81b4968) at wmFPUemu_glue.cc:123 addr_modes = {override = {address_size = 0 '\0', operand_size = 0 '\0', segment = 0 '\0'}, default_mode = 1 '\001'} data_address = 49074 data_sel_off = {offset = 49074, selector = 20135, opcode = 0, empty = 0} entry_sel_off = {offset = 9798, selector = 2065, opcode = 0, empty = 0} is_32 = 0 #5 0x080951c7 in bx_cpu_c::ESC7 (i=0x81b4968) at fpu.cc:134 No locals. #6 0x08088eb3 in bx_cpu_c::cpu_loop (max_instr_count=1) at cpu.cc:304 ret = 1 iStorage = { ResolveModrm = 0x808c9a0 <bx_cpu_c::Resolve16Mod0Rm6(bxInstruction_c *)>, execute = 0x80ae8f0 <bx_cpu_c::TEST_EbIb(bxInstruction_c *)>, metaInfo = 52346882, {modRMForm = {modRMData = 6291462, {Id = 4294967041, Iw = 65281, Ib = 1 '\001'}, {displ16u = 3386, displ32u = 1089932602}}, IxIxForm = {dummy = 6291462, {Id = 4294967041, Iw = 65281, Ib = 1 '\001'}, {Id2 = 1089932602, Iw2 = 3386, Ib2 = 58 ':'}}, IxForm = { opcodeReg = 6291462, {Id = 4294967041, Iw = 65281, Ib = 1 '\001'}, dummy = 1089932602}}} i = (bxInstruction_c *) 0x81b4968 execute = 0x80951b0 <bx_cpu_c::ESC7(bxInstruction_c *)> #7 0x0806f3ca in bx_begin_simulation (argc=1, argv=0xbffff824) at main.cc:2314 No locals. #8 0x080d877a in bx_real_sim_c::begin_simulation (this=0x82bbfe8, argc=1, argv=0xbffff824) at siminterface.cc:751 this = (bx_real_sim_c *) 0x82bbfe8 #9 0x080db357 in bx_config_interface (menu=8) at textconfig.cc:376 prompt = "\0\0\0\0ðÛ,\b\0\0\0\0ìõ\t@$¹\034@ Û,\b\0\0\0\0¸Ú,\b\0\0\0\0PÚ,\bÌæÿ¿$¹\034@$¹\034@À\005\006@\0 \0\0(×,\b\0\0\0\0`Ò,\b\0\0\0\0øÑ,\b\0\0\0\0\002\0\0\0\0\0\0\0 \0\0\0tçÿ¿\t\207\0@\016ù\v@\232\220\003@\0\0\0\0!\204\0@(H\001@xj\0\0øS\001@\027\0\0\0\0\0\002@×\021\n@\001\0\0\0\0\0\002@\0\0\0\0ê\021\n@\0\0\0\0\0\0\0\0_\220\003@®\021\n@ìC\v@!\006\0\0ìd\v@Üá\n@ÀY\001@\a\0\0\0"... floppyop = {Odevtype = 0x82ca130, Opath = 0x82ca900, Otype = 0x82ca9c0, Ostatus = 0x82cb190} cdromop = {Omenu = 0x82cb240, Opresent = 0x82cb2a8, Otype = 0x0, Omode = 0x402f208, Opath = 0x82c0538, Ojournal = 0x82c3690, Ocylinders = 0x82c67e8, Oheads = 0x82c9940, Ospt = 0x82bd698, Ostatus = 0x82c07f0, Omodel = 0x82c3948, Obiosdetect = 0x82c6aa0, Otranslation = 0x90b0f0e} choice = 1 #10 0x080db66a in bx_config_interface (menu=1) at textconfig.cc:412 default_choice = 5 prompt = "\0Å+\b\0Å+\b", '\0' <repeats 16 times>, "Lïÿ¿sÑ\t@\0\225\034@à\220\034@ØA-\b=Ð\t@$¹\034@à\220\034@ØA-\b\0\0\0\0ø\220\034@\0\0\0\0|ïÿ¿»ù\021@ð\224\034@à\220\034@|ïÿ¿£ù\021@\0Å+\b\0Å+\b", '\0' <repeats 16 times>, "lôÿ¿®\a\a\bàA-\b\002\0\0\0Àñÿ¿\230ð\021@\0Å+\b\0Å+\b$øÿ¿dï\021@$¹\034@\001\0\0\0\0\0\0\0\\\227\f@\230\237+\b<I+\b\034ðÿ¿\002\024\030@<I+\bh\233+\b\0t*\bìõ\t@$¹\034@"... floppyop = {Odevtype = 0x401cb924, Opath = 0x82d4370, Otype = 0x82d4370, Ostatus = 0x40098a1f} cdromop = {Omenu = 0x400972d0, Opresent = 0x138, Otype = 0x400b23bc, Omode = 0x40015bb0, Opath = 0xbffff404, Ojournal = 0x40008802, Ocylinders = 0xbffff35c, Oheads = 0x4011c0fb, Ospt = 0x82d4370, Ostatus = 0x40008421, Omodel = 0x40014828, Obiosdetect = 0x4011c0dd, Otranslation = 0x401cb924} choice = 5 #11 0x080dd99d in ci_callback (userdata=0x0, command=CI_START) at textconfig.cc:975 No locals. #12 0x080d8729 in bx_real_sim_c::configuration_interface (this=0x82bbfe8, ignore=0x80f71a2 "textconfig", command=CI_START) at siminterface.cc:743 this = (bx_real_sim_c *) 0x82bbfe8 ci_param = (bx_param_enum_c *) 0x82cdbf0 name = 0x80f71a2 "textconfig" retval = 0 #13 0x0806e6ec in bxmain () at main.cc:1785 ci_param = (bx_param_enum_c *) 0x82cdbf0 ci_name = 0x80f71a2 "textconfig" status = 135524996 context = {{__jmpbuf = {1075624228, 1073827044, -1073743836, -1073743956, -1073743996, 134669797}, __mask_was_saved = 0, __saved_mask = {__val = {0 <repeats 32 times>}}}} #14 0x0806e77b in main (argc=1, argv=0xbffff824) at main.cc:1965 No locals. #15 0x400c87ee in __libc_start_main () from /lib/libc.so.6 No symbol table info available. ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf