APAR status
Closed as program error.
Error description
The following test case is generating invalid assembly syntax which the assembler does not understand. The issue is related to how thread local storage variables are set to 'extern'. ===== TESTCASE ===== extern __thread int x, *p; int mytest(void **fp) { __asm ("ori %0, 1, 0" : "=r" (*(&fp))); p = &x; return 6; } This generates the following assembly: -------------------------------------------- +106 .tc x[TC],x[UL] +115 .extern x[UA] -------------------------------------------- Which causes these assembly errors: -------------------------------------------- Assembler: tls.s: line 106: 1252-023 The symbol x is not defined. tls.s: line 106: 1252-040 The specified expression is not valid. Make sure that all symbols are defined. Check the rules on symbols used in an arithmetic expression concerning relocation. -------------------------------------------- OR -------------------------------------------- Assembler: tls.s: line 106: 1252-142 Syntax error. -------------------------------------------- The correct syntax should look like: -------------------------------------------- +106 .tc x[TC],x[UL] +115 .extern x[UL] --------------------------------------------
Local fix
Remove 'extern' from TLS variable.
Problem summary
PROBLEM DESCRIPTION: extern thread local variables do not work when inline ASM is present. USERS AFFECTED: Users with TLS programs that want to use inline ASM.
Problem conclusion
The issue was corrected.
Temporary fix
Comments
APAR Information
APAR number
LI76388
Reported component name
XL C/C++ SLES10
Reported component ID
5724S7300
Reported release
900
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-08-17
Closed date
2011-08-17
Last modified date
2011-08-17
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
XL C/C++ SLES10
Fixed component ID
5724S7300
Applicable component levels
R900 PSN IZ93006
UP06/09/13
[{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSJT9L","label":"XL C\/C++"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.0","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}}]
Document Information
Modified date:
17 August 2011