Re: [Q] PowerPC compilation questions.

joe@sanskrit.ho.att.com (Joe Orost)
Mon, 11 Jul 1994 19:56:48 GMT

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Newsgroups: comp.compilers
From: joe@sanskrit.ho.att.com (Joe Orost)
Keywords: IBM, linker
Organization: AT&T
References: 94-07-048
Date: Mon, 11 Jul 1994 19:56:48 GMT

"Mohd Hanafiah Abdullah" <napi@cs.indiana.edu> writes:
>I need to know how the ACTIVATION RECORD produced by a compiler that follows
>the PowerPC specs looks like. Also, which registers are used for the STACK
>POINTER and FRAME POINTER? Finally, does the stack grow from low address to
>high address, or is it otherwise? Thanks.


Refer to the IBM Assembler Language Reference manual SC23-2197-01.
It is for POWER, but POWER PC is the same.


Here is the quick answer:


R1 Stack Pointer: Stack grows down (from high to low)
R2 TOC pointer
R3-R11 Argument registers
R12 scratch
R13-R31 preserved across calls


There is no frame pointer register.


                                                                regards,
                                                                joe
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