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 */ 37 38 #ifndef _MACHINE_PROFILE_H_ 39 #define _MACHINE_PROFILE_H_ 40 41 /* 42 * Config generates something to tell the compiler to align functions on 32 43 * byte boundaries. A strict alignment is good for keeping the tables small. 44 */ 45 #define FUNCTION_ALIGNMENT 16 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 2"); \ 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}"); \ 90 /* \ 91 * Return to the caller. Loading lr and pc in one instruction \ 92 * is deprecated on ARMv7 so we need this on its own. \ 93 */ \ 94 __asm__("ldmfd sp!, {pc}"); 95 void bintr(void); 96 void btrap(void); 97 void eintr(void); 98 void user(void); 99 100 #define MCOUNT_FROMPC_USER(pc) \ 101 ((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? (uintfptr_t)user : pc) 102 103 #define MCOUNT_FROMPC_INTR(pc) \ 104 ((pc >= (uintfptr_t)btrap && pc < (uintfptr_t)eintr) ? \ 105 ((pc >= (uintfptr_t)bintr) ? (uintfptr_t)bintr : \ 106 (uintfptr_t)btrap) : ~0U) 107 108 #ifdef _KERNEL 109 110 #define MCOUNT_DECL(s) register_t s; 111 112 #include <machine/asm.h> 113 #include <machine/cpufunc.h> 114 #define MCOUNT_ENTER(s) {s = intr_disable(); } /* kill IRQ */ 115 #define MCOUNT_EXIT(s) {intr_restore(s); } /* restore old value */ 116 117 void mcount(uintfptr_t frompc, uintfptr_t selfpc); 118 119 #else 120 typedef u_int uintfptr_t; 121 #endif /* _KERNEL */ 122 123 #endif /* !_MACHINE_PROFILE_H_ */ 124