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Diffstat (limited to 'sys/amd64/include/profile.h')
| -rw-r--r-- | sys/amd64/include/profile.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/sys/amd64/include/profile.h b/sys/amd64/include/profile.h new file mode 100644 index 000000000000..ec8e90c106e9 --- /dev/null +++ b/sys/amd64/include/profile.h @@ -0,0 +1,121 @@ +/*- + * SPDX-License-Identifier: BSD-3-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. 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. + */ + +#ifdef __i386__ +#include <i386/profile.h> +#else /* !__i386__ */ + +#ifndef _MACHINE_PROFILE_H_ +#define _MACHINE_PROFILE_H_ + +#ifndef _KERNEL + +#include <sys/cdefs.h> + +#define FUNCTION_ALIGNMENT 4 + +#define _MCOUNT_DECL \ +static void _mcount(uintfptr_t frompc, uintfptr_t selfpc) __used; \ +static void _mcount + +#define MCOUNT __asm(" \n\ + .text \n\ + .p2align 4,0x90 \n\ + .globl .mcount \n\ + .type .mcount,@function \n\ +.mcount: \n\ + pushq %rdi \n\ + pushq %rsi \n\ + pushq %rdx \n\ + pushq %rcx \n\ + pushq %r8 \n\ + pushq %r9 \n\ + pushq %rax \n\ + movq 8(%rbp),%rdi \n\ + movq 7*8(%rsp),%rsi \n\ + call _mcount \n\ + popq %rax \n\ + popq %r9 \n\ + popq %r8 \n\ + popq %rcx \n\ + popq %rdx \n\ + popq %rsi \n\ + popq %rdi \n\ + ret \n\ + .size .mcount, . - .mcount"); +#if 0 +/* + * We could use this, except it doesn't preserve the registers that were + * being passed with arguments to the function that we were inserted + * into. I've left it here as documentation of what the code above is + * supposed to do. + */ +#define MCOUNT \ +void \ +mcount() \ +{ \ + uintfptr_t selfpc, frompc; \ + /* \ + * Find the return address for mcount, \ + * and the return address for mcount's caller. \ + * \ + * selfpc = pc pushed by call to mcount \ + */ \ + __asm("movq 8(%%rbp),%0" : "=r" (selfpc)); \ + /* \ + * frompc = pc pushed by call to mcount's caller. \ + * The caller's stack frame has already been built, so %rbp is \ + * the caller's frame pointer. The caller's raddr is in the \ + * caller's frame following the caller's caller's frame pointer.\ + */ \ + __asm("movq (%%rbp),%0" : "=r" (frompc)); \ + frompc = ((uintfptr_t *)frompc)[1]; \ + _mcount(frompc, selfpc); \ +} +#endif + +typedef u_long uintfptr_t; + +/* + * An unsigned integral type that can hold non-negative difference between + * function pointers. + */ +typedef u_long fptrdiff_t; + +__BEGIN_DECLS +void mcount(void) __asm(".mcount"); +__END_DECLS + +#endif /* !_KERNEL */ + +#endif /* !_MACHINE_PROFILE_H_ */ + +#endif /* __i386__ */ |