LI76185: ERROR WITH TLS AND INLINE ASSEMBLY

June 2011 Update for XL C/C++ for Linux, V10.1
XL C/C++ for Linux Fix Pack 8 (January 2014 Update) for 10.1
January 2012 Update for XL C/C++ for Linux, V10.1
July 2012 Update for XL C/C++ for Linux, V10.1

APAR status

• Closed as program error.

Error description

• When compiling code that includes thread local storage (TLS) and
  inline assembly statements, the compiler is encountering an
  internal error.
  
  ----------------------------
  Assembler:
  tls.s: line 76: Too few arguments
  1500-067:(S) asm statement generates errors in assembler output.
  ----------------------------
  
  OR
  
  ----------------------------
  Assembler:
  tls.s: line 103: 1252-023 The symbol T.9.foo is not defined.
  tls.s: line 103: 1252-099 The specified displacement is not
  valid.
          The instruction displacement must be
          relocatable, absolute, or external.
  ----------------------------
  
  OR
  
  ----------------------------
  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.
  ----------------------------
  
  This is due to the AIX assembler not supporting thread local
  storage in the past.  Support for TLS was added to the
  assembler via the following AIX APARs:
  
  APAR_aix_53Q = IZ81338 5.3 TL9
  APAR_aix_53S = IZ81339 5.3 TL10
  APAR_aix_53V = IZ81340 5.3 TL11
  APAR_aix_53X = IZ81341 5.3 TL12
  APAR_aix_61D = IZ81343 6.1 TL2
  APAR_aix_61F = IZ81344 6.1 TL3
  APAR_aix_61H = IZ81346 6.1 TL4
  APAR_aix_61J = IZ81347 6.1 TL5
  APAR_aix_61L = IZ69955 6.1 TL6
  (AIX 7.1 base-level OS already contains the feature)
  
  One of these AIX APARs is required in conjunction with this
  compiler APAR to add support for mixed TLS/inline ASM code.
  

Local fix

• Split thread local storage and inline assembly into separate
  compilation units (i.e. separate source files)
  

Problem summary

• PROBLEM DESCRIPTION:
  Thread local storage was not supported in assembler source
  files.
  
  USERS AFFECTED:
  Customers using the V9.0 and V10.1 compilers wishing to use
  thread local storage within the same compilation unit as inline
  assembler statements.
  

Problem conclusion

• Thread local storage support in assembler source was added to
  the AIX assembler, and the compiler was updated to support this
  functionality.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IZ91054

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  XL C/C++ RHEL52

• Fixed component ID

  5724U8310

Applicable component levels

• RA10 PSN IZ91054

     UP06/09/13