The libitm ABI

The ABI provided by libitm is basically equal to the Linux variant of Intel’s current TM ABI specification document (Revision 1.1, May 6 2009) but with the differences listed in this chapter. It would be good if these changes would eventually be merged into a future version of this specification. To ease look-up, the following subsections mirror the structure of this specification.

• [No changes] Objectives
• [No changes] Non-objectives
• Library design principles
  • [No changes] Calling conventions
  • [No changes] TM library algorithms
  • [No changes] Optimized load and store routines
  • [No changes] Aligned load and store routines
  • Data logging functions
  • [No changes] Scatter/gather calls
  • [No changes] Serial and irrevocable mode
  • [No changes] Transaction descriptor
  • Store allocation
  • [No changes] Naming conventions
  • Function pointer encryption
• Types and macros list
• Function list
  • Initialization and finalization functions
  • [No changes] Version checking
  • [No changes] Error reporting
  • [No changes] inTransaction call
  • State manipulation functions
  • [No changes] Source locations
  • Starting a transaction
  • Aborting a transaction
  • Committing a transaction
  • Exception handling support
  • [No changes] Transition to serial–irrevocable mode
  • [No changes] Data transfer functions
  • [No changes] Transactional memory copies
  • Transactional versions of memmove
  • [No changes] Transactional versions of memset
  • [No changes] Logging functions
  • User-registered commit and undo actions
  • [New] Transactional indirect calls
  • [New] Transactional dynamic memory management
• [No changes] Future Enhancements to the ABI
• Sample code
• [New] Memory model