/* Trampoline for rs6000 CPU with AIX calling convention */
/*
* Copyright 1995-1999 Bruno Haible, <bruno@clisp.org>
*
* This is free software distributed under the GNU General Public Licence
* described in the file COPYING. Contact the author if you don't have this
* or can't live with it. There is ABSOLUTELY NO WARRANTY, explicit or implied,
* on this software.
*/
/* Available registers: r0, r12, r11, r10, r9, r8, r7, r6, r5, r4, r3. */
/* However, r0 is special in that it cannot be used as a base register. */
/* And r3...r10 should not be clobbered because they contain the first 8
* integer arguments to the function being called. */
.globl tramp
.globl .tramp
.csect tramp[DS]
tramp:
.long .tramp, 0, 0
.csect .text[PR]
.tramp:
/* Move <data> into <variable> */
l 11,0(2) /* get <variable> */
l 12,4(2) /* get <data> */
st 12,0(11)
/* Get <function> */
l 12,8(2)
/*
* gcc-2.6.3 source says:
* A function pointer is a pointer to a data area whose first word contains
* the actual address of the function, whose second word contains a pointer
* to its TOC, and whose third word contains a value to place in the static
* chain register (r11).
*/
l 11,8(12) /* pass static chain in r11 */
l 2,4(12) /* pass TOC in r2 */
l 0,0(12) /* actual code address */
mtctr 0
bctr
_section_.text:
.csect .data[RW]
.long _section_.text