The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * Copyright (c) 1992, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)profile.h   8.1 (Berkeley) 6/11/93
   34  * $FreeBSD: releng/6.1/sys/arm/include/profile.h 139735 2005-01-05 21:58:49Z imp $
   35  */
   36 
   37 #ifndef _MACHINE_PROFILE_H_
   38 #define _MACHINE_PROFILE_H_
   39 
   40 /*
   41  * Config generates something to tell the compiler to align functions on 32 
   42  * byte boundaries.  A strict alignment is good for keeping the tables small.
   43  */
   44 #define FUNCTION_ALIGNMENT      16
   45 
   46 
   47 #define _MCOUNT_DECL void mcount
   48 
   49 typedef u_long  fptrdiff_t;
   50 
   51 /*
   52  * Cannot implement mcount in C as GCC will trash the ip register when it
   53  * pushes a trapframe. Pity we cannot insert assembly before the function
   54  * prologue.
   55  */
   56 
   57 #ifndef PLTSYM
   58 #define PLTSYM
   59 #endif
   60 
   61 #define MCOUNT                                                          \
   62         __asm__(".text");                                               \
   63         __asm__(".align 0");                                            \
   64         __asm__(".type  _mcount ,%function");                           \
   65         __asm__(".global        _mcount");                              \
   66         __asm__("_mcount:");                                            \
   67         /*                                                              \
   68          * Preserve registers that are trashed during mcount            \
   69          */                                                             \
   70         __asm__("stmfd  sp!, {r0-r3, ip, lr}");                         \
   71         /*                                                              \
   72          * find the return address for mcount,                          \
   73          * and the return address for mcount's caller.                  \
   74          *                                                              \
   75          * frompcindex = pc pushed by call into self.                   \
   76          */                                                             \
   77         __asm__("mov    r0, ip");                                       \
   78         /*                                                              \
   79          * selfpc = pc pushed by mcount call                            \
   80          */                                                             \
   81         __asm__("mov    r1, lr");                                       \
   82         /*                                                              \
   83          * Call the real mcount code                                    \
   84          */                                                             \
   85         __asm__("bl     mcount");                                       \
   86         /*                                                              \
   87          * Restore registers that were trashed during mcount            \
   88          */                                                             \
   89         __asm__("ldmfd  sp!, {r0-r3, lr, pc}");
   90 void bintr(void);
   91 void btrap(void);
   92 void eintr(void);
   93 void user(void);
   94 
   95 #define MCOUNT_FROMPC_USER(pc)                                  \
   96         ((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? (uintfptr_t)user : pc)
   97 
   98 #define MCOUNT_FROMPC_INTR(pc)                                  \
   99         ((pc >= (uintfptr_t)btrap && pc < (uintfptr_t)eintr) ?  \
  100             ((pc >= (uintfptr_t)bintr) ? (uintfptr_t)bintr :    \
  101                 (uintfptr_t)btrap) : ~0U)
  102 
  103 
  104 #ifdef _KERNEL
  105 
  106 #define MCOUNT_DECL(s)  register_t s;
  107 
  108 #include <machine/asm.h>
  109 #include <machine/cpufunc.h>
  110 /*
  111  * splhigh() and splx() are heavyweight, and call mcount().  Therefore
  112  * we disabled interrupts (IRQ, but not FIQ) directly on the CPU.
  113  *
  114  * We're lucky that the CPSR and 's' both happen to be 'int's.
  115  */
  116 #define MCOUNT_ENTER(s) {s = intr_disable(); }  /* kill IRQ */
  117 #define MCOUNT_EXIT(s)  {intr_restore(s); }     /* restore old value */
  118 
  119 void    mcount(uintfptr_t frompc, uintfptr_t selfpc);
  120 
  121 #else
  122 typedef u_int   uintfptr_t;
  123 #endif /* _KERNEL */
  124 
  125 #endif /* !_MACHINE_PROFILE_H_ */

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