profile.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-4-Clause
    3  *
    4  * Copyright (c) 1992, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *      This product includes software developed by the University of
   18  *      California, Berkeley and its contributors.
   19  * 4. Neither the name of the University nor the names of its contributors
   20  *    may be used to endorse or promote products derived from this software
   21  *    without specific prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   33  * SUCH DAMAGE.
   34  *
   35  *      @(#)profile.h   8.1 (Berkeley) 6/11/93
   36  * $FreeBSD$
   37  */
   38 
   39 #ifndef _MACHINE_PROFILE_H_
   40 #define _MACHINE_PROFILE_H_
   41 
   42 /*
   43  * Config generates something to tell the compiler to align functions on 32
   44  * byte boundaries.  A strict alignment is good for keeping the tables small.
   45  */
   46 #define FUNCTION_ALIGNMENT      16
   47 
   48 #define _MCOUNT_DECL void mcount
   49 
   50 typedef u_long  fptrdiff_t;
   51 
   52 /*
   53  * Cannot implement mcount in C as GCC will trash the ip register when it
   54  * pushes a trapframe. Pity we cannot insert assembly before the function
   55  * prologue.
   56  */
   57 
   58 #ifndef PLTSYM
   59 #define PLTSYM
   60 #endif
   61 
   62 #define MCOUNT                                                          \
   63         __asm__(".text");                                               \
   64         __asm__(".align 2");                                            \
   65         __asm__(".type  __mcount ,%function");                          \
   66         __asm__(".global        __mcount");                             \
   67         __asm__("__mcount:");                                           \
   68         /*                                                              \
   69          * Preserve registers that are trashed during mcount            \
   70          */                                                             \
   71         __asm__("stmfd  sp!, {r0-r3, ip, lr}");                         \
   72         /*                                                              \
   73          * find the return address for mcount,                          \
   74          * and the return address for mcount's caller.                  \
   75          *                                                              \
   76          * frompcindex = pc pushed by call into self.                   \
   77          */                                                             \
   78         __asm__("mov    r0, ip");                                       \
   79         /*                                                              \
   80          * selfpc = pc pushed by mcount call                            \
   81          */                                                             \
   82         __asm__("mov    r1, lr");                                       \
   83         /*                                                              \
   84          * Call the real mcount code                                    \
   85          */                                                             \
   86         __asm__("bl     mcount");                                       \
   87         /*                                                              \
   88          * Restore registers that were trashed during mcount            \
   89          */                                                             \
   90         __asm__("ldmfd  sp!, {r0-r3, lr}");                             \
   91         /*                                                              \
   92          * Return to the caller. Loading lr and pc in one instruction   \
   93          * is deprecated on ARMv7 so we need this on its own.           \
   94          */                                                             \
   95         __asm__("ldmfd  sp!, {pc}");
   96 void bintr(void);
   97 void btrap(void);
   98 void eintr(void);
   99 void user(void);
  100 
  101 #define MCOUNT_FROMPC_USER(pc)                                  \
  102         ((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? (uintfptr_t)user : pc)
  103 
  104 #define MCOUNT_FROMPC_INTR(pc)                                  \
  105         ((pc >= (uintfptr_t)btrap && pc < (uintfptr_t)eintr) ?  \
  106             ((pc >= (uintfptr_t)bintr) ? (uintfptr_t)bintr :    \
  107                 (uintfptr_t)btrap) : ~0U)
  108 
  109 #ifdef _KERNEL
  110 
  111 #define MCOUNT_DECL(s)  register_t s;
  112 
  113 #include <machine/asm.h>
  114 #include <machine/cpufunc.h>
  115 #define MCOUNT_ENTER(s) {s = intr_disable(); }  /* kill IRQ */
  116 #define MCOUNT_EXIT(s)  {intr_restore(s); }     /* restore old value */
  117 
  118 void    mcount(uintfptr_t frompc, uintfptr_t selfpc);
  119 
  120 #else
  121 typedef u_int   uintfptr_t;
  122 #endif /* _KERNEL */
  123 
  124 #endif /* !_MACHINE_PROFILE_H_ */

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

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