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| Current File : //usr/src/sys/powerpc/include/profile.h |
/*-
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
* from: NetBSD: profile.h,v 1.9 1997/04/06 08:47:37 cgd Exp
* from: FreeBSD: src/sys/alpha/include/profile.h,v 1.4 1999/12/29
* $FreeBSD: release/9.1.0/sys/powerpc/include/profile.h 234708 2012-04-26 14:02:39Z nwhitehorn $
*/
#ifndef _MACHINE_PROFILE_H_
#define _MACHINE_PROFILE_H_
#define _MCOUNT_DECL void __mcount
#define FUNCTION_ALIGNMENT 4
typedef __ptrdiff_t fptrdiff_t;
/*
* The mcount trampoline macro, expanded in libc/gmon/mcount.c
*
* For PowerPC SVR4 ABI profiling, the compiler will insert
* a data declaration and code sequence at the start of a routine of the form
*
* .function_mc: .data
* .align 2
* .long 0
* .text
*
* function: mflr %r0
* addis %r11,%r0, .function_mc@ha
* stw %r0,4(%r1)
* addi %r0,%r11, .function_mc@l
* bl _mcount
*
* The link register is saved in the LR save word in the caller's
* stack frame, r0 is set up to point to the allocated longword,
* and control is transferred to _mcount.
*
* On return from _mcount, the routine should function as it would
* with no profiling so _mcount must restore register state to that upon
* entry. Any routine called by the _mcount trampoline will save
* callee-save registers, so _mcount must make sure it saves volatile
* registers that may have state after it returns i.e. parameter registers.
*
* The FreeBSD libc mcount routine ignores the r0 longword pointer, but
* instead requires as parameters the current PC and called PC. The current
* PC is obtained from the link register, as a result of "bl _mcount" in
* the stub, while the caller's PC is obtained from the LR save word.
*
* On return from libc mcount, the return is done indirectly with the
* ctr register rather than the link register, to allow the link register
* to be restored to what it was on entry to the profiled routine.
*/
#ifdef __powerpc64__
#define MCOUNT \
__asm( " .text \n" \
" .align 2 \n" \
" .globl _mcount \n" \
" .section \".opd\",\"aw\" \n" \
" .align 3 \n" \
"_mcount: \n" \
" .quad .L._mcount,.TOC.@tocbase,0\n" \
" .previous \n" \
" .size _mcount,24 \n" \
" .type _mcount,@function \n" \
" .align 4 \n" \
".L._mcount: \n" \
" stdu %r1,-(288+128)(%r1) \n" \
" std %r3,48(%r1) \n" \
" std %r4,56(%r1) \n" \
" std %r5,64(%r1) \n" \
" std %r6,72(%r1) \n" \
" std %r7,80(%r1) \n" \
" std %r8,88(%r1) \n" \
" std %r9,96(%r1) \n" \
" std %r10,104(%r1) \n" \
" mflr %r4 \n" \
" std %r4,112(%r1) \n" \
" ld %r3,0(%r1) \n" \
" ld %r3,0(%r3) \n" \
" ld %r3,16(%r3) \n" \
" bl __mcount \n" \
" nop \n" \
" ld %r4,112(%r1) \n" \
" mtlr %r4 \n" \
" ld %r3,48(%r1) \n" \
" ld %r4,56(%r1) \n" \
" ld %r5,64(%r1) \n" \
" ld %r6,72(%r1) \n" \
" ld %r7,80(%r1) \n" \
" ld %r8,88(%r1) \n" \
" ld %r9,96(%r1) \n" \
" ld %r10,104(%r1) \n" \
" addi %r1,%r1,(288+128) \n" \
" blr \n");
#else
#ifdef PIC
#define _PLT "@plt"
#else
#define _PLT
#endif
#define MCOUNT \
__asm( " .globl _mcount \n" \
" .type _mcount,@function \n" \
" .align 4 \n" \
"_mcount: \n" \
" stwu %r1,-64(%r1) \n" \
" stw %r3,16(%r1) \n" \
" stw %r4,20(%r1) \n" \
" stw %r5,24(%r1) \n" \
" stw %r6,28(%r1) \n" \
" stw %r7,32(%r1) \n" \
" stw %r8,36(%r1) \n" \
" stw %r9,40(%r1) \n" \
" stw %r10,44(%r1) \n" \
" mflr %r4 \n" \
" stw %r4,48(%r1) \n" \
" lwz %r3,68(%r1) \n" \
" bl __mcount" _PLT " \n" \
" lwz %r3,68(%r1) \n" \
" mtlr %r3 \n" \
" lwz %r4,48(%r1) \n" \
" mtctr %r4 \n" \
" lwz %r3,16(%r1) \n" \
" lwz %r4,20(%r1) \n" \
" lwz %r5,24(%r1) \n" \
" lwz %r6,28(%r1) \n" \
" lwz %r7,32(%r1) \n" \
" lwz %r8,36(%r1) \n" \
" lwz %r9,40(%r1) \n" \
" lwz %r10,44(%r1) \n" \
" addi %r1,%r1,64 \n" \
" bctr \n" \
"_mcount_end: \n" \
" .size _mcount,_mcount_end-_mcount");
#endif
#ifdef _KERNEL
#define MCOUNT_ENTER(s) s = intr_disable()
#define MCOUNT_EXIT(s) intr_restore(s)
#define MCOUNT_DECL(s) register_t s;
#ifndef COMPILING_LINT
#ifdef AIM
#include <machine/trap.h>
#define __PROFILE_VECTOR_BASE EXC_RST
#define __PROFILE_VECTOR_TOP (EXC_LAST + 0x100)
#endif /* AIM */
#ifdef E500
extern char interrupt_vector_base[];
extern char interrupt_vector_top[];
#define __PROFILE_VECTOR_BASE (uintfptr_t)interrupt_vector_base
#define __PROFILE_VECTOR_TOP (uintfptr_t)interrupt_vector_top
#endif /* E500 */
#endif /* !COMPILING_LINT */
#ifndef __PROFILE_VECTOR_BASE
#define __PROFILE_VECTOR_BASE 0
#endif
#ifndef __PROFILE_VECTOR_TOP
#define __PROFILE_VECTOR_TOP 1
#endif
static __inline void
powerpc_profile_interrupt(void)
{
}
static __inline void
powerpc_profile_userspace(void)
{
}
#define MCOUNT_FROMPC_USER(pc) \
((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? \
(uintfptr_t)powerpc_profile_userspace : pc)
#define MCOUNT_FROMPC_INTR(pc) \
((pc >= __PROFILE_VECTOR_BASE && \
pc < __PROFILE_VECTOR_TOP) ? \
(uintfptr_t)powerpc_profile_interrupt : ~0U)
void __mcount(uintfptr_t frompc, uintfptr_t selfpc);
#else /* !_KERNEL */
#ifdef __powerpc64__
typedef u_long uintfptr_t;
#else
typedef u_int uintfptr_t;
#endif
#endif /* _KERNEL */
#endif /* !_MACHINE_PROFILE_H_ */