Date: Tue, 11 Jul 95 14:59 EST From: sawmill!rjk@uunet.uu.net (Richard Kuhns) To: freebsd-hackers@freebsd.org Subject: BSDI 2 (or is it BSD/OS?) binaries Message-ID: <m0sVlTL-000BCpC@sawmill.uucp>
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Here's a little more info on the problem with running BSDI v2 binaries. The relevant assembly code: (gdb) disass start Dump of assembler code for function start: 0x102c <start>: pushl %ebp 0x102d <start+1>: movl %esp,%ebp 0x102f <start+3>: pushl %esi 0x1030 <start+4>: pushl %ebx 0x1031 <start+5>: cmpl $0x0,0x393d0 0x1038 <start+12>: jne 0x1044 <start+24> 0x103a <start+14>: movl $0xefbfdff0,0x393d0 0x1044 <start+24>: movl 0x393d0,%esi 0x104a <start+30>: movl 0x8(%esi),%edx 0x104d <start+33>: movl %edx,0x3a42c 0x1053 <start+39>: movl (%esi),%eax 0x1055 <start+41>: movl (%eax),%ebx 0x1057 <start+43>: testl %ebx,%ebx 0x1059 <start+45>: je 0x1076 <start+74> 0x105b <start+47>: pushl $0x2f 0x105d <start+49>: pushl %ebx 0x105e <start+50>: call 0x12f1c <strrchr> 0x1063 <start+55>: addl $0x8,%esp 0x1066 <start+58>: testl %eax,%eax 0x1068 <start+60>: je 0x106d <start+65> 0x106a <start+62>: incl %eax 0x106b <start+63>: jmp 0x106f <start+67> 0x106d <start+65>: movl %ebx,%eax 0x106f <start+67>: movl %eax,0x39494 0x1074 <start+72>: jmp 0x1080 <start+84> 0x1076 <start+74>: movl $0x1028,0x39494 0x1080 <start+84>: movl $0x0,0x3a43c 0x108a <start+94>: pushl 0x8(%esi) 0x108d <start+97>: pushl (%esi) 0x108f <start+99>: pushl 0x4(%esi) 0x1092 <start+102>: call 0x1494 <main> 0x1097 <start+107>: pushl %eax 0x1098 <start+108>: call 0x2bcb0 <exit> 0x109d <start+113>: leal 0xfffffff8(%ebp),%esp 0x10a0 <start+116>: popl %ebx 0x10a1 <start+117>: popl %esi 0x10a2 <start+118>: leave 0x10a3 <start+119>: ret ... The program terminates with a segmentation fault at 0x1055 in start (). Asking gdb for a backtrace gives (gdb) bt #0 0x1055 in start () Cannot access memory at address 0xefbfd9e0 (gdb) According to nm, the symbols around a couple of interesting addresses are: ... 000393d0 B ___ps_strings 000393d4 B _DHOME 000393d8 B ___cleanup 000393dc B __derrf 000393e0 B __derr 000393e4 B __derri 000393e8 B __derrs ... and ... 0003a42c B _environ 0003a430 B _oldmod 0003a438 B _group 0003a43c B _errno 0003a440 B _fls_file ... Anyone have any brainstorms? I'm still playing with this under FreeBSD 2.0 (my CDs haven't arrived yet), and I'm looking for someone with a BSDI 2 system that would be willing to give me a little info, too. -- Rich Kuhns rjk@grauel.com PO Box 6249 100 Sawmill Road Lafayette, IN 47903 (317)477-6000 x319
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