/*- * SPDX-License-Identifier: BSD-4-Clause * * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef _MACHINE_PROFILE_H_ #define _MACHINE_PROFILE_H_ /* * Config generates something to tell the compiler to align functions on 32 * byte boundaries. A strict alignment is good for keeping the tables small. */ #define FUNCTION_ALIGNMENT 16 #define _MCOUNT_DECL void mcount typedef u_long fptrdiff_t; /* * Cannot implement mcount in C as GCC will trash the ip register when it * pushes a trapframe. Pity we cannot insert assembly before the function * prologue. */ #ifndef PLTSYM #define PLTSYM #endif #define MCOUNT \ __asm__(".text"); \ __asm__(".align 2"); \ __asm__(".type __mcount ,%function"); \ __asm__(".global __mcount"); \ __asm__("__mcount:"); \ /* \ * Preserve registers that are trashed during mcount \ */ \ __asm__("stmfd sp!, {r0-r3, ip, lr}"); \ /* \ * find the return address for mcount, \ * and the return address for mcount's caller. \ * \ * frompcindex = pc pushed by call into self. \ */ \ __asm__("mov r0, ip"); \ /* \ * selfpc = pc pushed by mcount call \ */ \ __asm__("mov r1, lr"); \ /* \ * Call the real mcount code \ */ \ __asm__("bl mcount"); \ /* \ * Restore registers that were trashed during mcount \ */ \ __asm__("ldmfd sp!, {r0-r3, lr}"); \ /* \ * Return to the caller. Loading lr and pc in one instruction \ * is deprecated on ARMv7 so we need this on its own. \ */ \ __asm__("ldmfd sp!, {pc}"); void bintr(void); void btrap(void); void eintr(void); void user(void); #define MCOUNT_FROMPC_USER(pc) \ ((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? (uintfptr_t)user : pc) #define MCOUNT_FROMPC_INTR(pc) \ ((pc >= (uintfptr_t)btrap && pc < (uintfptr_t)eintr) ? \ ((pc >= (uintfptr_t)bintr) ? (uintfptr_t)bintr : \ (uintfptr_t)btrap) : ~0U) #ifdef _KERNEL #define MCOUNT_DECL(s) register_t s; #include <machine/asm.h> #include <machine/cpufunc.h> #define MCOUNT_ENTER(s) {s = intr_disable(); } /* kill IRQ */ #define MCOUNT_EXIT(s) {intr_restore(s); } /* restore old value */ void mcount(uintfptr_t frompc, uintfptr_t selfpc); #else typedef u_int uintfptr_t; #endif /* _KERNEL */ #endif /* !_MACHINE_PROFILE_H_ */
