97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
/*-
|
|
* SPDX-License-Identifier: MIT-CMU
|
|
*
|
|
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
|
|
* All rights reserved.
|
|
*
|
|
* Author: Chris G. Demetriou
|
|
*
|
|
* Permission to use, copy, modify and distribute this software and
|
|
* its documentation is hereby granted, provided that both the copyright
|
|
* notice and this permission notice appear in all copies of the
|
|
* software, derivative works or modified versions, and any portions
|
|
* thereof, and that both notices appear in supporting documentation.
|
|
*
|
|
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
|
|
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
|
|
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
|
*
|
|
* Carnegie Mellon requests users of this software to return to
|
|
*
|
|
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
|
* School of Computer Science
|
|
* Carnegie Mellon University
|
|
* Pittsburgh PA 15213-3890
|
|
*
|
|
* any improvements or extensions that they make and grant Carnegie the
|
|
* rights to redistribute these changes.
|
|
*
|
|
* from: NetBSD: profile.h,v 1.9 1997/04/06 08:47:37 cgd Exp
|
|
* from: FreeBSD: src/sys/alpha/include/profile.h,v 1.4 1999/12/29
|
|
*/
|
|
|
|
#ifdef __arm__
|
|
#include <arm/profile.h>
|
|
#else /* !__arm__ */
|
|
|
|
#ifndef _MACHINE_PROFILE_H_
|
|
#define _MACHINE_PROFILE_H_
|
|
|
|
#define FUNCTION_ALIGNMENT 32
|
|
|
|
typedef u_long fptrdiff_t;
|
|
|
|
#ifndef _KERNEL
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
typedef __uintfptr_t uintfptr_t;
|
|
|
|
#define _MCOUNT_DECL \
|
|
static void _mcount(uintfptr_t frompc, uintfptr_t selfpc) __used; \
|
|
static void _mcount
|
|
|
|
/*
|
|
* Call into _mcount. On arm64 the .mcount is a function so callers will
|
|
* handle caller saved registers. As we don't directly touch any callee
|
|
* saved registers we can just load the two arguments and use a tail call
|
|
* into the MI _mcount function.
|
|
*
|
|
* When building with gcc frompc will be in x0, however this is not the
|
|
* case on clang. As such we need to load it from the stack. As long as
|
|
* the caller follows the ABI this will load the correct value.
|
|
*/
|
|
#define MCOUNT __asm( \
|
|
" .text \n" \
|
|
" .align 6 \n" \
|
|
" .type .mcount,#function \n" \
|
|
" .globl .mcount \n" \
|
|
" .mcount: \n" \
|
|
" .cfi_startproc \n" \
|
|
/* Load the caller return address as frompc */ \
|
|
" ldr x0, [x29, #8] \n" \
|
|
/* Use our return address as selfpc */ \
|
|
" mov x1, lr \n" \
|
|
" b _mcount \n" \
|
|
" .cfi_endproc \n" \
|
|
" .size .mcount, . - .mcount \n" \
|
|
);
|
|
#if 0
|
|
/*
|
|
* If clang passed frompc correctly we could implement it like this, however
|
|
* all clang versions we care about would need to be fixed before we could
|
|
* make this change.
|
|
*/
|
|
void
|
|
mcount(uintfptr_t frompc)
|
|
{
|
|
_mcount(frompc, __builtin_return_address(0));
|
|
}
|
|
#endif
|
|
|
|
#endif /* !_KERNEL */
|
|
|
|
#endif /* !_MACHINE_PROFILE_H_ */
|
|
|
|
#endif /* !__arm__ */
|