sys/arm/include/profile.h

   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_ */