On 07/08/2011 04:44 PM, Gilles Chanteperdrix wrote:
On 07/08/2011 04:06 PM, Anders Blomdell wrote:
On 07/08/2011 02:41 PM, Gilles Chanteperdrix wrote:
On 07/07/2011 11:47 PM, Anders Blomdell wrote:
When compiling kernel 2.6.37.3 and xenomai 2.5.6 with "gcc version 4.6.0
20110530 (Red Hat 4.6.0-9) (GCC)", programs fail with -ENOSYS in
rt_task_shadow. If compiled with "gcc version 4.5.1 20100924 (Red Hat
4.5.1-4) (GCC)" everything works as expected.
Could you send us the disassembly of the two functions?
Which functions? Print[fk] debugging got me to suspect the
syscall/skin_mux interface, but I'm a bit at loss of exactly where the
code ends up.
The two rt_task_shadow, the one which works, and the one which does not.
Ok, attached the two routines taken from respective libnative.so.3
Will try to recompile with gcc-4.6.1 as well.
/Anders
--
Anders Blomdell Email: anders.blomd...@control.lth.se
Department of Automatic Control
Lund University Phone: +46 46 222 4625
P.O. Box 118 Fax: +46 46 138118
SE-221 00 Lund, Sweden
000083a0 <rt_task_shadow>:
83a0: 55 push %ebp
83a1: 57 push %edi
83a2: 56 push %esi
83a3: 53 push %ebx
83a4: e8 c0 a1 ff ff call 2569 <__i686.get_pc_thunk.bx>
83a9: 81 c3 93 56 00 00 add $0x5693,%ebx
83af: 81 ec ac 08 00 00 sub $0x8ac,%esp
83b5: 8b b4 24 c0 08 00 00 mov 0x8c0(%esp),%esi
83bc: e8 3b 9d ff ff call 20fc <xeno_fault_stack@plt>
83c1: 85 f6 test %esi,%esi
83c3: 8d 84 24 90 08 00 00 lea 0x890(%esp),%eax
83ca: c7 44 24 04 00 00 00 movl $0x0,0x4(%esp)
83d1: 00
83d2: 0f 44 f0 cmove %eax,%esi
83d5: c7 04 24 01 00 00 00 movl $0x1,(%esp)
83dc: e8 fb 9e ff ff call 22dc <pthread_setcanceltype@plt>
83e1: e8 c6 9e ff ff call 22ac
<xeno_sigshadow_install_once@plt>
83e6: 8b 84 24 c4 08 00 00 mov 0x8c4(%esp),%eax
83ed: 89 b4 24 78 08 00 00 mov %esi,0x878(%esp)
83f4: 89 84 24 7c 08 00 00 mov %eax,0x87c(%esp)
83fb: 8b 84 24 c8 08 00 00 mov 0x8c8(%esp),%eax
8402: 89 84 24 80 08 00 00 mov %eax,0x880(%esp)
8409: 8b 84 24 cc 08 00 00 mov 0x8cc(%esp),%eax
8410: 89 84 24 84 08 00 00 mov %eax,0x884(%esp)
8417: e8 a0 9e ff ff call 22bc <pthread_self@plt>
841c: 89 84 24 88 08 00 00 mov %eax,0x888(%esp)
8423: e8 34 9d ff ff call 215c <xeno_init_current_mode@plt>
8428: b9 f4 ff ff ff mov $0xfffffff4,%ecx
842d: 85 c0 test %eax,%eax
842f: 89 84 24 8c 08 00 00 mov %eax,0x88c(%esp)
8436: 0f 84 bd 00 00 00 je 84f9 <rt_task_shadow+0x159>
843c: 8d 83 00 aa ff ff lea -0x5600(%ebx),%eax
8442: 89 84 24 74 08 00 00 mov %eax,0x874(%esp)
8449: 89 ac 24 70 08 00 00 mov %ebp,0x870(%esp)
8450: 8b bb e8 ff ff ff mov -0x18(%ebx),%edi
8456: 8d 84 24 70 08 00 00 lea 0x870(%esp),%eax
845d: 89 84 24 98 08 00 00 mov %eax,0x898(%esp)
8464: 8d ac 24 78 08 00 00 lea 0x878(%esp),%ebp
846b: 90 nop
846c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
8470: 8b 07 mov (%edi),%eax
8472: 31 c9 xor %ecx,%ecx
8474: c7 44 24 28 00 00 00 movl $0x0,0x28(%esp)
847b: 00
847c: 0d 2b 02 00 00 or $0x22b,%eax
8481: 89 84 24 9c 08 00 00 mov %eax,0x89c(%esp)
8488: 89 e8 mov %ebp,%eax
848a: 53 push %ebx
848b: 89 c3 mov %eax,%ebx
848d: 8b 84 24 9c 08 00 00 mov 0x89c(%esp),%eax
8494: 55 push %ebp
8495: 8b ac 24 98 08 00 00 mov 0x898(%esp),%ebp
849c: cd 80 int $0x80
849e: 5d pop %ebp
849f: 5b pop %ebx
84a0: 89 c1 mov %eax,%ecx
84a2: 8b 44 24 28 mov 0x28(%esp),%eax
84a6: 85 c0 test %eax,%eax
84a8: 74 1a je 84c4 <rt_task_shadow+0x124>
84aa: 8d 44 24 28 lea 0x28(%esp),%eax
84ae: 89 4c 24 08 mov %ecx,0x8(%esp)
84b2: c7 44 24 04 ab ff ff movl $0xffffffab,0x4(%esp)
84b9: ff
84ba: 89 04 24 mov %eax,(%esp)
84bd: e8 aa 9d ff ff call 226c <__xnsig_dispatch@plt>
84c2: 89 c1 mov %eax,%ecx
84c4: 83 f9 ab cmp $0xffffffab,%ecx
84c7: 74 a7 je 8470 <rt_task_shadow+0xd0>
84c9: 8d 83 b9 ca ff ff lea -0x3547(%ebx),%eax
84cf: 89 44 24 04 mov %eax,0x4(%esp)
84d3: 8d 83 5c c5 ff ff lea -0x3aa4(%ebx),%eax
84d9: 89 4c 24 0c mov %ecx,0xc(%esp)
84dd: c7 44 24 08 df 00 00 movl $0xdf,0x8(%esp)
84e4: 00
84e5: 89 04 24 mov %eax,(%esp)
84e8: 89 4c 24 1c mov %ecx,0x1c(%esp)
84ec: e8 ab 9c ff ff call 219c <printf@plt>
84f1: 8b 4c 24 1c mov 0x1c(%esp),%ecx
84f5: 85 c9 test %ecx,%ecx
84f7: 74 0f je 8508 <rt_task_shadow+0x168>
84f9: 81 c4 ac 08 00 00 add $0x8ac,%esp
84ff: 89 c8 mov %ecx,%eax
8501: 5b pop %ebx
8502: 5e pop %esi
8503: 5f pop %edi
8504: 5d pop %ebp
8505: c3 ret
8506: 66 90 xchg %ax,%ax
8508: 8b 7e 04 mov 0x4(%esi),%edi
850b: 8b 83 f4 ff ff ff mov -0xc(%ebx),%eax
8511: 8b 36 mov (%esi),%esi
8513: 65 89 78 04 mov %edi,%gs:0x4(%eax)
8517: 65 89 30 mov %esi,%gs:(%eax)
851a: e8 bd 9c ff ff call 21dc <xeno_set_current@plt>
851f: 8b 4c 24 1c mov 0x1c(%esp),%ecx
8523: 81 c4 ac 08 00 00 add $0x8ac,%esp
8529: 5b pop %ebx
852a: 5e pop %esi
852b: 5f pop %edi
852c: 89 c8 mov %ecx,%eax
852e: 5d pop %ebp
852f: c3 ret
00006ec0 <rt_task_shadow>:
6ec0: 55 push %ebp
6ec1: 89 e5 mov %esp,%ebp
6ec3: 57 push %edi
6ec4: 56 push %esi
6ec5: 53 push %ebx
6ec6: e8 9e b4 ff ff call 2369 <__i686.get_pc_thunk.bx>
6ecb: 81 c3 75 28 00 00 add $0x2875,%ebx
6ed1: 81 ec ac 08 00 00 sub $0x8ac,%esp
6ed7: 8b 75 08 mov 0x8(%ebp),%esi
6eda: e8 e1 b1 ff ff call 20c0 <xeno_fault_stack@plt>
6edf: 85 f6 test %esi,%esi
6ee1: 8d 45 d8 lea -0x28(%ebp),%eax
6ee4: 0f 44 f0 cmove %eax,%esi
6ee7: c7 44 24 04 00 00 00 movl $0x0,0x4(%esp)
6eee: 00
6eef: c7 04 24 01 00 00 00 movl $0x1,(%esp)
6ef6: e8 95 b3 ff ff call 2290 <pthread_setcanceltype@plt>
6efb: e8 60 b3 ff ff call 2260
<xeno_sigshadow_install_once@plt>
6f00: 8b 45 0c mov 0xc(%ebp),%eax
6f03: 89 75 c0 mov %esi,-0x40(%ebp)
6f06: 89 45 c4 mov %eax,-0x3c(%ebp)
6f09: 8b 45 10 mov 0x10(%ebp),%eax
6f0c: 89 45 c8 mov %eax,-0x38(%ebp)
6f0f: 8b 45 14 mov 0x14(%ebp),%eax
6f12: 89 45 cc mov %eax,-0x34(%ebp)
6f15: e8 56 b3 ff ff call 2270 <pthread_self@plt>
6f1a: 89 45 d0 mov %eax,-0x30(%ebp)
6f1d: e8 fe b1 ff ff call 2120 <xeno_init_current_mode@plt>
6f22: 89 c2 mov %eax,%edx
6f24: 85 d2 test %edx,%edx
6f26: 89 45 d4 mov %eax,-0x2c(%ebp)
6f29: b8 f4 ff ff ff mov $0xfffffff4,%eax
6f2e: 0f 84 89 00 00 00 je 6fbd <rt_task_shadow+0xfd>
6f34: 8d 83 f4 d7 ff ff lea -0x280c(%ebx),%eax
6f3a: 89 45 bc mov %eax,-0x44(%ebp)
6f3d: 89 6d b8 mov %ebp,-0x48(%ebp)
6f40: 8b bb e8 ff ff ff mov -0x18(%ebx),%edi
6f46: 8d 45 b8 lea -0x48(%ebp),%eax
6f49: 89 45 e4 mov %eax,-0x1c(%ebp)
6f4c: 8d 85 70 f7 ff ff lea -0x890(%ebp),%eax
6f52: 8d 55 c0 lea -0x40(%ebp),%edx
6f55: 89 85 64 f7 ff ff mov %eax,-0x89c(%ebp)
6f5b: 90 nop
6f5c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
6f60: 8b 07 mov (%edi),%eax
6f62: 31 c9 xor %ecx,%ecx
6f64: c7 85 70 f7 ff ff 00 movl $0x0,-0x890(%ebp)
6f6b: 00 00 00
6f6e: 0d 2b 02 00 00 or $0x22b,%eax
6f73: 89 45 e0 mov %eax,-0x20(%ebp)
6f76: 87 d3 xchg %edx,%ebx
6f78: 8b 45 e0 mov -0x20(%ebp),%eax
6f7b: 55 push %ebp
6f7c: 8b 6d e4 mov -0x1c(%ebp),%ebp
6f7f: cd 80 int $0x80
6f81: 5d pop %ebp
6f82: 87 d3 xchg %edx,%ebx
6f84: 8b 8d 70 f7 ff ff mov -0x890(%ebp),%ecx
6f8a: 85 c9 test %ecx,%ecx
6f8c: 74 26 je 6fb4 <rt_task_shadow+0xf4>
6f8e: 89 44 24 08 mov %eax,0x8(%esp)
6f92: 8b 85 64 f7 ff ff mov -0x89c(%ebp),%eax
6f98: 89 95 60 f7 ff ff mov %edx,-0x8a0(%ebp)
6f9e: c7 44 24 04 ab ff ff movl $0xffffffab,0x4(%esp)
6fa5: ff
6fa6: 89 04 24 mov %eax,(%esp)
6fa9: e8 72 b2 ff ff call 2220 <__xnsig_dispatch@plt>
6fae: 8b 95 60 f7 ff ff mov -0x8a0(%ebp),%edx
6fb4: 83 f8 ab cmp $0xffffffab,%eax
6fb7: 74 a7 je 6f60 <rt_task_shadow+0xa0>
6fb9: 85 c0 test %eax,%eax
6fbb: 74 0b je 6fc8 <rt_task_shadow+0x108>
6fbd: 81 c4 ac 08 00 00 add $0x8ac,%esp
6fc3: 5b pop %ebx
6fc4: 5e pop %esi
6fc5: 5f pop %edi
6fc6: 5d pop %ebp
6fc7: c3 ret
6fc8: 8b 7e 04 mov 0x4(%esi),%edi
6fcb: 8b 93 f4 ff ff ff mov -0xc(%ebx),%edx
6fd1: 8b 36 mov (%esi),%esi
6fd3: 65 89 7a 04 mov %edi,%gs:0x4(%edx)
6fd7: 65 89 32 mov %esi,%gs:(%edx)
6fda: 89 85 60 f7 ff ff mov %eax,-0x8a0(%ebp)
6fe0: e8 ab b1 ff ff call 2190 <xeno_set_current@plt>
6fe5: 8b 85 60 f7 ff ff mov -0x8a0(%ebp),%eax
6feb: 81 c4 ac 08 00 00 add $0x8ac,%esp
6ff1: 5b pop %ebx
6ff2: 5e pop %esi
6ff3: 5f pop %edi
6ff4: 5d pop %ebp
6ff5: c3 ret
6ff6: 8d 76 00 lea 0x0(%esi),%esi
6ff9: 8d bc 27 00 00 00 00 lea 0x0(%edi,%eiz,1),%edi
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