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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  * $FreeBSD$
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_ */