* [Xenomai-core] Problems with gcc 4.6.0 (rt_task_shadow fails with ENOSYS)
@ 2011-07-07 21:47 Anders Blomdell
2011-07-08 12:41 ` Gilles Chanteperdrix
` (2 more replies)
0 siblings, 3 replies; 10+ messages in thread
From: Anders Blomdell @ 2011-07-07 21:47 UTC (permalink / raw)
To: xenomai
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.
Regards
Anders Blomdell
--
Anders Blomdell Email: anders.blomdell@domain.hid
Department of Automatic Control
Lund University Phone: +46 46 222 4625
P.O. Box 118 Fax: +46 46 138118
SE-221 00 Lund, Sweden
^ permalink raw reply [flat|nested] 10+ messages in thread* Re: [Xenomai-core] Problems with gcc 4.6.0 (rt_task_shadow fails with ENOSYS) 2011-07-07 21:47 [Xenomai-core] Problems with gcc 4.6.0 (rt_task_shadow fails with ENOSYS) Anders Blomdell @ 2011-07-08 12:41 ` Gilles Chanteperdrix 2011-07-08 14:06 ` Anders Blomdell 2011-07-11 15:25 ` Daniele Nicolodi 2011-07-11 18:43 ` Gilles Chanteperdrix 2 siblings, 1 reply; 10+ messages in thread From: Gilles Chanteperdrix @ 2011-07-08 12:41 UTC (permalink / raw) To: Anders Blomdell; +Cc: xenomai 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? -- Gilles. ^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [Xenomai-core] Problems with gcc 4.6.0 (rt_task_shadow fails with ENOSYS) 2011-07-08 12:41 ` Gilles Chanteperdrix @ 2011-07-08 14:06 ` Anders Blomdell 2011-07-08 14:44 ` Gilles Chanteperdrix 0 siblings, 1 reply; 10+ messages in thread From: Anders Blomdell @ 2011-07-08 14:06 UTC (permalink / raw) To: Gilles Chanteperdrix; +Cc: xenomai 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. Regards Anders -- Anders Blomdell Email: anders.blomdell@domain.hid Department of Automatic Control Lund University Phone: +46 46 222 4625 P.O. Box 118 Fax: +46 46 138118 SE-221 00 Lund, Sweden ^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [Xenomai-core] Problems with gcc 4.6.0 (rt_task_shadow fails with ENOSYS) 2011-07-08 14:06 ` Anders Blomdell @ 2011-07-08 14:44 ` Gilles Chanteperdrix 2011-07-08 14:58 ` Anders Blomdell 0 siblings, 1 reply; 10+ messages in thread From: Gilles Chanteperdrix @ 2011-07-08 14:44 UTC (permalink / raw) To: Anders Blomdell; +Cc: xenomai 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. -- Gilles. ^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [Xenomai-core] Problems with gcc 4.6.0 (rt_task_shadow fails with ENOSYS) 2011-07-08 14:44 ` Gilles Chanteperdrix @ 2011-07-08 14:58 ` Anders Blomdell 0 siblings, 0 replies; 10+ messages in thread From: Anders Blomdell @ 2011-07-08 14:58 UTC (permalink / raw) To: Gilles Chanteperdrix; +Cc: xenomai [-- Attachment #1: Type: text/plain, Size: 1142 bytes --] 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.blomdell@domain.hid Department of Automatic Control Lund University Phone: +46 46 222 4625 P.O. Box 118 Fax: +46 46 138118 SE-221 00 Lund, Sweden [-- Attachment #2: bad --] [-- Type: text/plain, Size: 5326 bytes --] 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 [-- Attachment #3: good --] [-- Type: text/plain, Size: 4988 bytes --] 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 ^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [Xenomai-core] Problems with gcc 4.6.0 (rt_task_shadow fails with ENOSYS) 2011-07-07 21:47 [Xenomai-core] Problems with gcc 4.6.0 (rt_task_shadow fails with ENOSYS) Anders Blomdell 2011-07-08 12:41 ` Gilles Chanteperdrix @ 2011-07-11 15:25 ` Daniele Nicolodi 2011-07-11 18:43 ` Gilles Chanteperdrix 2 siblings, 0 replies; 10+ messages in thread From: Daniele Nicolodi @ 2011-07-11 15:25 UTC (permalink / raw) To: xenomai On 07/07/11 22:47, 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. I just want to note that I encountered the same problem on Debian testing. Unfortunately I can not provide more details right now (I'm at the Amaldi9 conference in Cardiff, any Xenomai dev or user around?) Cheers, -- Daniele ^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [Xenomai-core] Problems with gcc 4.6.0 (rt_task_shadow fails with ENOSYS) 2011-07-07 21:47 [Xenomai-core] Problems with gcc 4.6.0 (rt_task_shadow fails with ENOSYS) Anders Blomdell 2011-07-08 12:41 ` Gilles Chanteperdrix 2011-07-11 15:25 ` Daniele Nicolodi @ 2011-07-11 18:43 ` Gilles Chanteperdrix 2011-07-26 12:09 ` Daniele Nicolodi 2 siblings, 1 reply; 10+ messages in thread From: Gilles Chanteperdrix @ 2011-07-11 18:43 UTC (permalink / raw) To: Anders Blomdell; +Cc: xenomai 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. I think it is due to the modifications of syscall.h I made to implement pseudo-signals handling, which implementation was never finished, and removed in xenomai-head. Could you try xenomai-head to see if you get the failure? I tried backporting it, but the code evolved too much in both repositories, the backport needs to spend some time on it, so, I would like to know whether it is really needed. -- Gilles. ^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [Xenomai-core] Problems with gcc 4.6.0 (rt_task_shadow fails with ENOSYS) 2011-07-11 18:43 ` Gilles Chanteperdrix @ 2011-07-26 12:09 ` Daniele Nicolodi 2011-07-27 18:55 ` Gilles Chanteperdrix 0 siblings, 1 reply; 10+ messages in thread From: Daniele Nicolodi @ 2011-07-26 12:09 UTC (permalink / raw) To: xenomai On 11/07/11 20:43, 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. > > I think it is due to the modifications of syscall.h I made to implement > pseudo-signals handling, which implementation was never finished, and > removed in xenomai-head. Could you try xenomai-head to see if you get > the failure? I tried backporting it, but the code evolved too much in > both repositories, the backport needs to spend some time on it, so, I > would like to know whether it is really needed. Has this issue been investigated further? I may have the occasion to try again to compile a Xenomai kernel with gcc 4.6 this week and I would like to know where to start to debug and solve this issue. Thank you. Cheers, -- Daniele ^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [Xenomai-core] Problems with gcc 4.6.0 (rt_task_shadow fails with ENOSYS) 2011-07-26 12:09 ` Daniele Nicolodi @ 2011-07-27 18:55 ` Gilles Chanteperdrix 2011-07-28 7:37 ` Daniele Nicolodi 0 siblings, 1 reply; 10+ messages in thread From: Gilles Chanteperdrix @ 2011-07-27 18:55 UTC (permalink / raw) To: Daniele Nicolodi; +Cc: xenomai On 07/26/2011 02:09 PM, Daniele Nicolodi wrote: > On 11/07/11 20:43, 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. >> >> I think it is due to the modifications of syscall.h I made to implement >> pseudo-signals handling, which implementation was never finished, and >> removed in xenomai-head. Could you try xenomai-head to see if you get >> the failure? I tried backporting it, but the code evolved too much in >> both repositories, the backport needs to spend some time on it, so, I >> would like to know whether it is really needed. > > Has this issue been investigated further? I may have the occasion to try > again to compile a Xenomai kernel with gcc 4.6 this week and I would > like to know where to start to debug and solve this issue. > > Thank you. Cheers, The issue has been investigated, as explained in the mail you are quoting, it seems to be due to the implementation of pseudo-signals which as in xenomai 2.5 code and no longer is in xenomai-head code. In order to get confirmation, I am still waiting for someone to test xenomai-head with gcc 4.6. -- Gilles. ^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [Xenomai-core] Problems with gcc 4.6.0 (rt_task_shadow fails with ENOSYS) 2011-07-27 18:55 ` Gilles Chanteperdrix @ 2011-07-28 7:37 ` Daniele Nicolodi 0 siblings, 0 replies; 10+ messages in thread From: Daniele Nicolodi @ 2011-07-28 7:37 UTC (permalink / raw) To: Gilles Chanteperdrix; +Cc: xenomai On 27/07/11 20:55, Gilles Chanteperdrix wrote: > The issue has been investigated, as explained in the mail you are > quoting, it seems to be due to the implementation of pseudo-signals > which as in xenomai 2.5 code and no longer is in xenomai-head code. > > In order to get confirmation, I am still waiting for someone to test > xenomai-head with gcc 4.6. Thank you Gilles. I was checking if any confirmation of the cause of the bug was given, just to not waste the limited time I have to test this performing a test with known results. I'll compile xenomai-head with gcc 4.6 and report my results. Cheers, -- Daniele ^ permalink raw reply [flat|nested] 10+ messages in thread
end of thread, other threads:[~2011-07-28 7:37 UTC | newest] Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2011-07-07 21:47 [Xenomai-core] Problems with gcc 4.6.0 (rt_task_shadow fails with ENOSYS) Anders Blomdell 2011-07-08 12:41 ` Gilles Chanteperdrix 2011-07-08 14:06 ` Anders Blomdell 2011-07-08 14:44 ` Gilles Chanteperdrix 2011-07-08 14:58 ` Anders Blomdell 2011-07-11 15:25 ` Daniele Nicolodi 2011-07-11 18:43 ` Gilles Chanteperdrix 2011-07-26 12:09 ` Daniele Nicolodi 2011-07-27 18:55 ` Gilles Chanteperdrix 2011-07-28 7:37 ` Daniele Nicolodi
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