profile.h

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    1 /*-
    2  * SPDX-License-Identifier: MIT-CMU
    3  *
    4  * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
    5  * All rights reserved.
    6  *
    7  * Author: Chris G. Demetriou
    8  * 
    9  * Permission to use, copy, modify and distribute this software and
   10  * its documentation is hereby granted, provided that both the copyright
   11  * notice and this permission notice appear in all copies of the
   12  * software, derivative works or modified versions, and any portions
   13  * thereof, and that both notices appear in supporting documentation.
   14  * 
   15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 
   16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 
   17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   18  * 
   19  * Carnegie Mellon requests users of this software to return to
   20  *
   21  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   22  *  School of Computer Science
   23  *  Carnegie Mellon University
   24  *  Pittsburgh PA 15213-3890
   25  *
   26  * any improvements or extensions that they make and grant Carnegie the
   27  * rights to redistribute these changes.
   28  *
   29  *      from: NetBSD: profile.h,v 1.9 1997/04/06 08:47:37 cgd Exp
   30  *      from: FreeBSD: src/sys/alpha/include/profile.h,v 1.4 1999/12/29
   31  * $FreeBSD$
   32  */
   33 
   34 #ifndef _MACHINE_PROFILE_H_
   35 #define _MACHINE_PROFILE_H_
   36 
   37 #define _MCOUNT_DECL    void __mcount
   38 
   39 #define FUNCTION_ALIGNMENT      4
   40 
   41 typedef __ptrdiff_t     fptrdiff_t;
   42 
   43 /*
   44  * The mcount trampoline macro, expanded in libc/gmon/mcount.c
   45  *
   46  * For PowerPC SVR4 ABI profiling, the compiler will insert
   47  * a data declaration and code sequence at the start of a routine of the form
   48  *
   49  * .function_mc:        .data
   50  *                      .align  2
   51  *                      .long   0
   52  *                      .text
   53  *
   54  * function:            mflr    %r0
   55  *                      addis   %r11,%r0, .function_mc@ha
   56  *                      stw     %r0,4(%r1)
   57  *                      addi    %r0,%r11, .function_mc@l
   58  *                      bl      _mcount
   59  *
   60  * The link register is saved in the LR save word in the caller's
   61  * stack frame, r0 is set up to point to the allocated longword,
   62  * and control is transferred to _mcount.
   63  *
   64  * On return from _mcount, the routine should function as it would
   65  * with no profiling so _mcount must restore register state to that upon
   66  * entry. Any routine called by the _mcount trampoline will save
   67  * callee-save registers, so _mcount must make sure it saves volatile
   68  * registers that may have state after it returns i.e. parameter registers.
   69  *
   70  * The FreeBSD libc mcount routine ignores the r0 longword pointer, but
   71  * instead requires as parameters the current PC and called PC. The current
   72  * PC is obtained from the link register, as a result of "bl _mcount" in
   73  * the stub, while the caller's PC is obtained from the LR save word.
   74  *
   75  * On return from libc mcount, the return is done indirectly with the
   76  * ctr register rather than the link register, to allow the link register
   77  * to be restored to what it was on entry to the profiled routine.
   78  */
   79 
   80 #if defined(__powerpc64__)
   81 
   82 #if !defined(_CALL_ELF) || _CALL_ELF == 1
   83 #define MCOUNT_PREAMBLE \
   84         "       .align  2                       \n" \
   85         "       .globl  _mcount                 \n" \
   86         "       .section \".opd\",\"aw\"        \n" \
   87         "       .align  3                       \n" \
   88         "_mcount:                               \n" \
   89         "       .quad .L._mcount,.TOC.@tocbase,0\n" \
   90         "       .previous                       \n" \
   91         "       .size   _mcount,24              \n" \
   92         "       .type   _mcount,@function       \n" \
   93         "       .align  4                       \n" \
   94         ".L._mcount:                            \n" 
   95 #else
   96 #define MCOUNT_PREAMBLE \
   97         "       .globl  _mcount                 \n" \
   98         "       .type   _mcount,@function       \n" \
   99         "       .align  4                       \n" \
  100         "_mcount:                               \n"
  101 #endif
  102 
  103 #define MCOUNT                                  \
  104 __asm(  MCOUNT_PREAMBLE \
  105         "       stdu    %r1,-(288+128)(%r1)     \n" \
  106         "       std     %r3,48(%r1)             \n" \
  107         "       std     %r4,56(%r1)             \n" \
  108         "       std     %r5,64(%r1)             \n" \
  109         "       std     %r6,72(%r1)             \n" \
  110         "       std     %r7,80(%r1)             \n" \
  111         "       std     %r8,88(%r1)             \n" \
  112         "       std     %r9,96(%r1)             \n" \
  113         "       std     %r10,104(%r1)           \n" \
  114         "       mflr    %r4                     \n" \
  115         "       std     %r4,112(%r1)            \n" \
  116         "       ld      %r3,0(%r1)              \n" \
  117         "       ld      %r3,0(%r3)              \n" \
  118         "       ld      %r3,16(%r3)             \n" \
  119         "       bl      __mcount                \n" \
  120         "       nop                             \n" \
  121         "       ld      %r4,112(%r1)            \n" \
  122         "       mtlr    %r4                     \n" \
  123         "       ld      %r3,48(%r1)             \n" \
  124         "       ld      %r4,56(%r1)             \n" \
  125         "       ld      %r5,64(%r1)             \n" \
  126         "       ld      %r6,72(%r1)             \n" \
  127         "       ld      %r7,80(%r1)             \n" \
  128         "       ld      %r8,88(%r1)             \n" \
  129         "       ld      %r9,96(%r1)             \n" \
  130         "       ld      %r10,104(%r1)           \n" \
  131         "       addi    %r1,%r1,(288+128)       \n" \
  132         "       blr                             \n");
  133 #else
  134 
  135 #ifdef PIC
  136 #define _PLT "@plt"
  137 #else
  138 #define _PLT
  139 #endif
  140 
  141 #define MCOUNT                                  \
  142 __asm(  "       .globl  _mcount                 \n" \
  143         "       .type   _mcount,@function       \n" \
  144         "       .align  4                       \n" \
  145         "_mcount:                               \n" \
  146         "       stwu    %r1,-64(%r1)            \n" \
  147         "       stw     %r3,16(%r1)             \n" \
  148         "       stw     %r4,20(%r1)             \n" \
  149         "       stw     %r5,24(%r1)             \n" \
  150         "       stw     %r6,28(%r1)             \n" \
  151         "       stw     %r7,32(%r1)             \n" \
  152         "       stw     %r8,36(%r1)             \n" \
  153         "       stw     %r9,40(%r1)             \n" \
  154         "       stw     %r10,44(%r1)            \n" \
  155         "       mflr    %r4                     \n" \
  156         "       stw     %r4,48(%r1)             \n" \
  157         "       lwz     %r3,68(%r1)             \n" \
  158         "       bl      __mcount" _PLT "        \n" \
  159         "       lwz     %r3,68(%r1)             \n" \
  160         "       mtlr    %r3                     \n" \
  161         "       lwz     %r4,48(%r1)             \n" \
  162         "       mtctr   %r4                     \n" \
  163         "       lwz     %r3,16(%r1)             \n" \
  164         "       lwz     %r4,20(%r1)             \n" \
  165         "       lwz     %r5,24(%r1)             \n" \
  166         "       lwz     %r6,28(%r1)             \n" \
  167         "       lwz     %r7,32(%r1)             \n" \
  168         "       lwz     %r8,36(%r1)             \n" \
  169         "       lwz     %r9,40(%r1)             \n" \
  170         "       lwz     %r10,44(%r1)            \n" \
  171         "       addi    %r1,%r1,64              \n" \
  172         "       bctr                            \n" \
  173         "_mcount_end:                           \n" \
  174         "       .size   _mcount,_mcount_end-_mcount");
  175 #endif
  176 
  177 #ifdef _KERNEL
  178 #define MCOUNT_ENTER(s)         s = intr_disable()
  179 #define MCOUNT_EXIT(s)          intr_restore(s)
  180 #define MCOUNT_DECL(s)          register_t s;
  181 
  182 #ifndef COMPILING_LINT
  183 #ifdef AIM
  184 #include <machine/trap.h>
  185 #define __PROFILE_VECTOR_BASE   EXC_RST
  186 #define __PROFILE_VECTOR_TOP    (EXC_LAST + 0x100)
  187 #endif  /* AIM */
  188 #if defined(BOOKE)
  189 extern char interrupt_vector_base[];
  190 extern char interrupt_vector_top[];
  191 #define __PROFILE_VECTOR_BASE   (uintfptr_t)interrupt_vector_base
  192 #define __PROFILE_VECTOR_TOP    (uintfptr_t)interrupt_vector_top
  193 #endif  /* BOOKE_E500 */
  194 
  195 #endif  /* !COMPILING_LINT */
  196 
  197 #ifndef __PROFILE_VECTOR_BASE
  198 #define __PROFILE_VECTOR_BASE   0
  199 #endif
  200 #ifndef __PROFILE_VECTOR_TOP
  201 #define __PROFILE_VECTOR_TOP    1
  202 #endif
  203 
  204 static __inline void
  205 powerpc_profile_interrupt(void)
  206 {
  207 }
  208 
  209 static __inline void
  210 powerpc_profile_userspace(void)
  211 {
  212 }
  213 
  214 #define MCOUNT_FROMPC_USER(pc)                          \
  215         ((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ?        \
  216             (uintfptr_t)powerpc_profile_userspace : pc)
  217 
  218 #define MCOUNT_FROMPC_INTR(pc)                          \
  219         ((pc >= __PROFILE_VECTOR_BASE &&                \
  220           pc < __PROFILE_VECTOR_TOP) ?                  \
  221             (uintfptr_t)powerpc_profile_interrupt : ~0U)
  222 
  223 void __mcount(uintfptr_t frompc, uintfptr_t selfpc);
  224 
  225 #else   /* !_KERNEL */
  226 
  227 #ifdef __powerpc64__
  228 typedef u_long  uintfptr_t;
  229 #else
  230 typedef u_int   uintfptr_t;
  231 #endif
  232 
  233 #endif  /* _KERNEL */
  234 
  235 #endif /* !_MACHINE_PROFILE_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/powerpc/include/profile.h

FreeBSD/Linux Kernel Cross Reference
sys/powerpc/include/profile.h