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gcc.exe and rhide.exe (and probably others) crash under bochs. I have DJGPP running under bochs with DOS 6.22 bochs crashes with the errors below I've had issues with rhide even when not running under bochs, just a console window in windows 2k or XP will often generate GPF's randomly Any ideas on why this would be happening? ---------------------------------------------------------------------------- 00059530884i[CPU ] #GP(0): SetCR4: Write of 0x00000010 not supported (allow =0x0) 00059545717i[CPU ] LOCK prefix unallowed (op1=0x53, attr=0x0, mod=0x0, nnn= 00059579359p[CPU ] >>PANIC<< prefetch: RIP > CS.limit 00059579359i[SYS ] Last time is 1087536663 # In bx_win32_gui_c::exit(void)! 00059579359i[CPU ] real mode 00059579359i[CPU ] CS.d_b = 16 bit 00059579359i[CPU ] SS.d_b = 16 bit 00059579359i[CPU ] | EAX=0000006e EBX=00000023 ECX=00000007 EDX=00000000 00059579359i[CPU ] | ESP=000008f8 EBP=00005e62 ESI=0000010d EDI=00000002 00059579359i[CPU ] | IOPL=0 OV UP DI NG NZ AC PO NC 00059579359i[CPU ] | SEG selector base limit G D 00059579359i[CPU ] | SEG sltr(index|ti|rpl) base limit G D 00059579359i[CPU ] | DS:011c( 0004| 0| 0) 000011c0 0000ffff 0 1 00059579359i[CPU ] | ES:011c( 0000| 0| 0) 000011c0 0000ffff 0 1 00059579359i[CPU ] | FS:1be0( 0000| 0| 0) 0001be00 0000ffff 0 1 00059579359i[CPU ] | GS:1be0( 0000| 0| 0) 0001be00 0000ffff 0 1 00059579359i[CPU ] | SS:011c( 0004| 0| 0) 000011c0 0000ffff 0 0 00059579359i[CPU ] | CS:5e90( 0003| 0| 0) 0005e900 0000ffff 0 0 00059579359i[CPU ] | EIP=00010700 (00010700) 00059579359i[CPU ] | CR0=0x00000010 CR1=0x00000000 CR2=0x00000000 00059579359i[CPU ] | CR3=0x00000000 CR4=0x00000000 00059579359i[ ] restoring default signal behavior ======================================================================== Bochs is exiting with the following message: [CPU ] prefetch: RIP > CS.limit ======================================================================== 00059579359i[CTRL ] quit_sim called with exit code 1 ------------------------------------------------------------------------ or THIS error 00030000531i[CPU ] protected mode 00030000531i[CPU ] CS.d_b = 16 bit 00030000531i[CPU ] SS.d_b = 32 bit 00030000531i[CPU ] | EAX=0000000d EBX=0000249a ECX=00000087 EDX=00000000 00030000531i[CPU ] | ESP=00003c86 EBP=00000000 ESI=4343475c EDI=00000005 00030000531i[CPU ] | IOPL=0 NV UP DI PL NZ NA PO NC 00030000531i[CPU ] | SEG selector base limit G D 00030000531i[CPU ] | SEG sltr(index|ti|rpl) base limit G D 00030000531i[CPU ] | DS:0020( 0004| 0| 0) 0001e2b0 0000ffff 0 1 00030000531i[CPU ] | ES:0000( 0000| 0| 0) 0001e2b0 0000ffff 0 1 00030000531i[CPU ] | FS:0000( 0000| 0| 0) 0001e2b0 0000ffff 0 1 00030000531i[CPU ] | GS:0000( 0000| 0| 0) 0001e2b0 0000ffff 0 1 00030000531i[CPU ] | SS:0020( 0004| 0| 0) 0001e2b0 0000ffff 0 1 00030000531i[CPU ] | CS:0018( 0003| 0| 0) 00019a30 0000ffff 0 0 00030000531i[CPU ] | EIP=00003c58 (00003c53) 00030000531i[CPU ] | CR0=0x80000019 CR1=0x00000000 CR2=0x00000000 00030000531i[CPU ] | CR3=0x0002f000 CR4=0x00000000 00030000531i[ ] restoring default signal behavior ======================================================================== Bochs is exiting with the following message: [CPU ] jump_protected: JUMP to busy 386 TSS unsupported. ========================================================================
Found the solution for this one, the bug is with cwsdpmi (Thanks to Chris Giese from alt.os.development for the info) From http://clio.rice.edu/djgpp/r5bug03.txt Bug Report CWSDPMI tests wrong feature bit when turning on PSE bit in CR4 Summary: On CPUs which support TSCs but not 4Mb pages (currently this is only known to happen in BOCHS emulator) CWSDPMI will set the PSE bit in CR4, even though it is not supported. This can generate many warnings in the emulator, but might cause a crash in a real CPU if one exists. Analysis: CWSDPMI is testing the wrong bit, it should choose bit 3 in MSWITCH, not bit 4 (0x10) in the comparison. 4Mb pages are not used in this release. By updating cwsdpmi, it has fixed the problem. I used this link http://clio.rice.edu/djgpp/r5updtst.zip
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