Bug 139806
| Summary: | ia32el doesn't output elf32 core dump files. | ||||||
|---|---|---|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 4 | Reporter: | L3support <linux-sid> | ||||
| Component: | ia32el | Assignee: | Jakub Jelinek <jakub> | ||||
| Status: | CLOSED RAWHIDE | QA Contact: | |||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | medium | ||||||
| Version: | 4.0 | CC: | grgustaf, jturner, yoav.zach | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | ia64 | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2005-01-14 11:28:56 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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With ia32el the kernel doesn't really know at all that the emulator is running 32-bit process. I guess one option is let ia32el do the core dumping (intercept SIGABRT, SIGSEGV etc. signals) in userland. In case of SIGSEGV, ia32el can output 32bit core dump file. So it
seems that ia32el cannot properly handle some signals whose action is
'core'.
----
$ cat test-sigsegv.c
main()
{
int *p, *q;
p=0;
*q=*p;
}
$ file test-sigsegv
test-sigsegv: ELF 32-bit LSB executable, Intel 80386, version 1
(SYSV), for GNU/Linux 2.2.5, dynamically linked (uses shared libs),
not stripped
$ uname -a
Linux ipf11 2.6.9-1.648_EL #1 SMP Tue Oct 26 12:20:12 EDT 2004 ia64
ia64 ia64 GNU/Linux
$ /etc/init.d/ia32el status
Intel IA-32 Execution Layer in use
$ ./test-sigsegv
Segmentation fault
$ file core.7607
core.7607: ELF 32-bit LSB core file Intel 80386, version 1 (SYSV),
SVR4-style, SVR4-style, from 'test-sigsegv'
-----------------------
Thanks,
Created attachment 107672 [details]
fix for this issue
Should be fixed in ia32el-1.1-12 in dist-4E-lacd, also put to ftp://people.redhat.com/jakub/ia32el/ Fix confirmed with 1.1-20: [root@tomservo tmp]# arch ia64 [root@tomservo tmp]# file core.27830 core.27830: ELF 32-bit LSB core file Intel 80386, version 1 (SYSV), SVR4-style, SVR4-style, from 'test-core' |
Description of problem: ia32el doesn't output elf32 core dump files but elf64 core dump files. Version-Release number of selected component (if applicable): ia32el-1.1-8 How reproducible: always Steps to Reproduce: 1. Compile the following source on RHEL4 for i386 # cat test-core.c #include <stdio.h> #include <stdlib.h> main() { printf("start\n"); CBABRT(); printf("ended\n"); } CBABRT() { abort(); } # cc -o test-core test-core.c 2. Copy the compiled application to RHEL4 for ia64 3. Run the applicaion on IA32EL # /etc/init.d/ia32el status Intel IA-32 Execution Layer in use # ulimit -c unlimited # file test-core test-core: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.2.5, dynamically linked (uses shared libs), not stripped # ./test-core start Aborted (core dumped) 4. See the file type of the core dump file # file core.<pid> core.6420: ELF 64-bit LSB core file IA-64, version 1 (SYSV), SVR4-style, SVR4-style, SVR4-style Actual results: core.6420: ELF 64-bit LSB core file IA-64, version 1 (SYSV), SVR4-style, SVR4-style, SVR4-style Expected results: core.6420: ELF 32-bit LSB core file Intel 80386, version 1 (SYSV), SVR4-style, SVR4-style, from 'test-core' Additional info: