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eabi.asm question
- To: "'egcs at cygnus dot com'" <egcs at cygnus dot com>
- Subject: eabi.asm question
- From: Jay Monkman <jmonkman at frasca dot com>
- Date: Thu, 28 May 1998 15:55:49 -0500
I have a question about the function __eabi in
gcc/config/rs6000/eabi.asm. Here is the relevant code:
FUNC_START(__eabi)
< stuff deleted >
#else /* -mrelocatable */
mflr 0
bl .Laddr /* get current address
*/
.Laddr:
mflr 12 /* real address of
.Laddr */
lwz 11,(.Lptr-.Laddr)(12) /* linker generated
address of .LCTOC1 */
add 11,11,12 /* correct to real
pointer */
lwz 12,.Ltable(11) /* get linker's idea of
where .Laddr is */
lwz 10,.Linit(11) /* address of init flag
*/
subf. 12,12,11 /* calculate difference
*/
lwzx 9,10,12 /* done flag */
cmplwi 2,9,0 /* init flag != 0? */
bnelr 2 /* return now, if we've
been called already */
Here, LR still holds the address of .Laddr, instead of the return
address. Doesn't LR need to be
restored from R0 before this instruction?