So I took the rollup patch I posted earlier (which made things work on
x86-64), and tried to compile it on my x86 Ubuntu "Horny Hedgehog" laptop. I
had to revert the /lib64 change, of course. (I need to come up with a good
fix for that.)
I also needed to change one more thing: replacing <asm/signal.h> with
<signal.h> in skas-i386/stub_segv.c. (I.E. the same kind of fix I had to
make for skas-x86_64/stub_segv.c.)
That got it to build. Here's the panic and the dissassembly:
Initialized stdio console driver
Console initialized on /dev/tty0
Failed to open 'root_fs', errno = 2
VFS: Mounted root (hostfs filesystem).
Stub registers -
0 - 0
1 - 0
2 - 0
3 - 0
4 - 0
5 - 0
6 - 0
7 - 7b
8 - 7b
9 - 0
10 - 33
11 - ffffffff
12 - 40000c20
13 - 73
14 - 210246
15 - bf55ec10
16 - 7b
Kernel panic - not syncing: get_skas_faultinfo : failed to wait for
SIGUSR1/SIGTRAP, pid = 13213, n = 13213, errno = 0, status = 0xb7f
EIP: 0073:[<40000c20>] CPU: 0 Not tainted ESP: 007b:bf55ec10 EFLAGS: 00210246
Not tainted
EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000
ESI: 00000000 EDI: 00000000 EBP: 00000000 DS: 007b ES: 007b
088a7bac: [<08080b5d>] notifier_call_chain+0x2d/0x50
088a7bc8: [<080714a1>] panic+0x71/0x110
088a7be0: [<0805e910>] wait_stub_done+0x100/0x190
088a7c60: [<0805ea1a>] get_skas_faultinfo+0x7a/0xa0
088a7c70: [<0806a081>] save_registers+0x41/0x80
088a7c78: [<08060602>] user_signal+0x62/0x70
088a7c8c: [<0805f0f0>] userspace+0x180/0x220
088a7cd8: [<08055f50>] init+0x0/0x170
088a7ce4: [<0805fc12>] new_thread_handler+0xf2/0x130
081130b0 <stub_segv_handler>:
81130b0: 8b 44 24 5c mov 0x5c(%esp),%eax
81130b4: 8d 54 24 08 lea 0x8(%esp),%edx
81130b8: a3 04 f0 ff bf mov %eax,0xbffff004
81130bd: 8b 44 24 3c mov 0x3c(%esp),%eax
81130c1: a3 00 f0 ff bf mov %eax,0xbffff000
81130c6: 8b 44 24 38 mov 0x38(%esp),%eax
81130ca: a3 08 f0 ff bf mov %eax,0xbffff008
81130cf: 89 d0 mov %edx,%eax
81130d1: 89 c4 mov %eax,%esp
81130d3: b8 77 00 00 00 mov $0x77,%eax
81130d8: cd 80 int $0x80
81130da: c3 ret
08113000 <stub_clone_handler>:
8113000: 83 ec 14 sub $0x14,%esp
8113003: ba 78 00 00 00 mov $0x78,%edx
8113008: b9 fc f7 ff bf mov $0xbffff7fc,%ecx
811300d: 89 5c 24 04 mov %ebx,0x4(%esp)
8113011: 89 d0 mov %edx,%eax
8113013: bb 11 84 00 00 mov $0x8411,%ebx
8113018: 89 6c 24 10 mov %ebp,0x10(%esp)
811301c: bd 00 f0 ff bf mov $0xbffff000,%ebp
8113021: 89 74 24 08 mov %esi,0x8(%esp)
8113025: 89 7c 24 0c mov %edi,0xc(%esp)
8113029: cd 80 int $0x80
811302b: 85 c0 test %eax,%eax
811302d: 89 c7 mov %eax,%edi
811302f: 75 5c jne 811308d
<stub_clone_handler+0x8d>
8113031: b8 1a 00 00 00 mov $0x1a,%eax
8113036: 89 fb mov %edi,%ebx
8113038: 89 f9 mov %edi,%ecx
811303a: 89 fa mov %edi,%edx
811303c: 89 fe mov %edi,%esi
811303e: cd 80 int $0x80
8113040: 85 c0 test %eax,%eax
8113042: 89 c7 mov %eax,%edi
8113044: 75 47 jne 811308d
<stub_clone_handler+0x8d>
8113046: be 68 00 00 00 mov $0x68,%esi
811304b: bb 01 00 00 00 mov $0x1,%ebx
8113050: b9 08 f0 ff bf mov $0xbffff008,%ecx
8113055: 89 f0 mov %esi,%eax
8113057: 89 fa mov %edi,%edx
8113059: cd 80 int $0x80
811305b: 85 c0 test %eax,%eax
811305d: 89 c7 mov %eax,%edi
811305f: 75 2c jne 811308d
<stub_clone_handler+0x8d>
8113061: 8b 1d 00 f0 ff bf mov 0xbffff000,%ebx
8113067: b9 00 10 00 00 mov $0x1000,%ecx
811306c: ba 03 00 00 00 mov $0x3,%edx
8113071: be 11 00 00 00 mov $0x11,%esi
8113076: 8b 3d 04 f0 ff bf mov 0xbffff004,%edi
811307c: 89 d8 mov %ebx,%eax
811307e: 89 eb mov %ebp,%ebx
8113080: 55 push %ebp
8113081: 89 c5 mov %eax,%ebp
8113083: b8 c0 00 00 00 mov $0xc0,%eax
8113088: cd 80 int $0x80
811308a: 5d pop %ebp
811308b: 89 c7 mov %eax,%edi
811308d: 89 7d 18 mov %edi,0x18(%ebp)
8113090: cc int3
8113091: 8b 5c 24 04 mov 0x4(%esp),%ebx
8113095: 8b 74 24 08 mov 0x8(%esp),%esi
8113099: 8b 7c 24 0c mov 0xc(%esp),%edi
811309d: 8b 6c 24 10 mov 0x10(%esp),%ebp
81130a1: 83 c4 14 add $0x14,%esp
81130a4: c3 ret
81130a5: 90 nop
81130a6: 90 nop
81130a7: 90 nop
81130a8: 90 nop
81130a9: 90 nop
81130aa: 90 nop
81130ab: 90 nop
81130ac: 90 nop
81130ad: 90 nop
81130ae: 90 nop
81130af: 90 nop
This make any sense to you? (the original 2.6.15-rc1 builds for me just fine
on x86, but I'd like a codebase that builds on both x86-64 and x86. Yes, I'm
picky...)
Rob
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