REXX External Assembler API › Execution Interfaces › LINK and ATTACH Handlers

LINK and ATTACH Handlers

The ADDRESS LINK pgm and ADDRESS ATTACH pgm statements execute these programs.

The routines are called as documented in the TSO/E REXX Reference:

• R0 on entry points to an environment block.
• R1 on entry points to a parameter list.
• R13 (save area address), R14 (return address), and R15 (entry point address) are standard.
• AMODE is that of the target load module.

  Note: Parameters are above the line. Calling programs in AMODE 24 can result in an ABEND.

The parameter list has two fullwords with the top bit set in the last word. The list contains the following parameters:

• Address of the passed character string
• Length of the passed character string