91b4d1bfc2
- Don't use a frame pointer. Our callers need a frame pointer, but we
could only use one to support things that aren't supported. (These
things are:
- profiling of profiling
- debugging of profiling. The core ENTRY() macro doesn't support
forcing a frame pointer for debugging, so don't do more here.)
- Ensure that we are in the text section and have normal alignment.
- Use the normal syntax for `.type'.
202 lines
5.9 KiB
C
202 lines
5.9 KiB
C
/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)profile.h 8.1 (Berkeley) 6/11/93
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* $FreeBSD$
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*/
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#ifndef _MACHINE_PROFILE_H_
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#define _MACHINE_PROFILE_H_
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#ifndef _SYS_CDEFS_H_
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#error this file needs sys/cdefs.h as a prerequisite
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#endif
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#ifdef _KERNEL
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/*
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* Config generates something to tell the compiler to align functions on 16
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* byte boundaries. A strict alignment is good for keeping the tables small.
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*/
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#define FUNCTION_ALIGNMENT 16
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/*
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* The kernel uses assembler stubs instead of unportable inlines.
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* This is mainly to save a little time when profiling is not enabled,
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* which is the usual case for the kernel.
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*/
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#define _MCOUNT_DECL void mcount
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#define MCOUNT
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#ifdef GUPROF
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#define MCOUNT_DECL(s)
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#define MCOUNT_ENTER(s)
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#define MCOUNT_EXIT(s)
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#ifdef __GNUCLIKE_ASM
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#define MCOUNT_OVERHEAD(label) \
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__asm __volatile("pushq %0; call __mcount; popq %%rcx" \
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: \
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: "i" (label) \
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: "ax", "dx", "cx", "di", "si", "r8", "r9", "memory")
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#define MEXITCOUNT_OVERHEAD() \
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__asm __volatile("call .mexitcount; 1:" \
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: : \
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: "ax", "dx", "cx", "di", "si", "r8", "r9", "memory")
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#define MEXITCOUNT_OVERHEAD_GETLABEL(labelp) \
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__asm __volatile("movq $1b,%0" : "=rm" (labelp))
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#elif defined(lint)
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#define MCOUNT_OVERHEAD(label)
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#define MEXITCOUNT_OVERHEAD()
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#define MEXITCOUNT_OVERHEAD_GETLABEL()
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#else
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#error this file needs to be ported to your compiler
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#endif /* !__GNUCLIKE_ASM */
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#else /* !GUPROF */
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#define MCOUNT_DECL(s) u_long s;
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#ifdef SMP
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extern int mcount_lock;
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#define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); \
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while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1)) \
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/* nothing */ ; }
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#define MCOUNT_EXIT(s) { atomic_store_rel_int(&mcount_lock, 0); \
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write_rflags(s); }
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#else
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#define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); }
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#define MCOUNT_EXIT(s) (write_rflags(s))
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#endif
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#endif /* GUPROF */
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void bintr(void);
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void btrap(void);
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void eintr(void);
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void user(void);
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#define MCOUNT_FROMPC_USER(pc) \
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((pc < (uintfptr_t)VM_MAXUSER_ADDRESS) ? (uintfptr_t)user : pc)
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#define MCOUNT_FROMPC_INTR(pc) \
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((pc >= (uintfptr_t)btrap && pc < (uintfptr_t)eintr) ? \
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((pc >= (uintfptr_t)bintr) ? (uintfptr_t)bintr : \
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(uintfptr_t)btrap) : ~0UL)
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#else /* !_KERNEL */
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#define FUNCTION_ALIGNMENT 4
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#define _MCOUNT_DECL \
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static void _mcount(uintfptr_t frompc, uintfptr_t selfpc) __used; \
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static void _mcount
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#ifdef __GNUCLIKE_ASM
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#define MCOUNT __asm(" \n\
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.text \n\
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.p2align 4,0x90 \n\
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.globl .mcount \n\
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.type .mcount,@function \n\
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.mcount: \n\
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pushq %rdi \n\
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pushq %rsi \n\
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pushq %rdx \n\
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pushq %rcx \n\
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pushq %r8 \n\
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pushq %r9 \n\
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pushq %rax \n\
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movq 8(%rbp),%rdi \n\
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movq 7*8(%rsp),%rsi \n\
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call _mcount \n\
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popq %rax \n\
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popq %r9 \n\
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popq %r8 \n\
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popq %rcx \n\
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popq %rdx \n\
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popq %rsi \n\
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popq %rdi \n\
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ret \n\
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.size .mcount, . - .mcount");
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#if 0
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/*
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* We could use this, except it doesn't preserve the registers that were
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* being passed with arguments to the function that we were inserted
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* into. I've left it here as documentation of what the code above is
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* supposed to do.
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*/
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#define MCOUNT \
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void \
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mcount() \
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{ \
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uintfptr_t selfpc, frompc; \
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/* \
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* Find the return address for mcount, \
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* and the return address for mcount's caller. \
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* \
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* selfpc = pc pushed by call to mcount \
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*/ \
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__asm("movq 8(%%rbp),%0" : "=r" (selfpc)); \
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/* \
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* frompc = pc pushed by call to mcount's caller. \
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* The caller's stack frame has already been built, so %rbp is \
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* the caller's frame pointer. The caller's raddr is in the \
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* caller's frame following the caller's caller's frame pointer.\
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*/ \
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__asm("movq (%%rbp),%0" : "=r" (frompc)); \
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frompc = ((uintfptr_t *)frompc)[1]; \
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_mcount(frompc, selfpc); \
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}
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#endif
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#else /* !__GNUCLIKE_ASM */
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#define MCOUNT
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#endif /* __GNUCLIKE_ASM */
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typedef u_long uintfptr_t;
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#endif /* _KERNEL */
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/*
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* An unsigned integral type that can hold non-negative difference between
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* function pointers.
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*/
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typedef u_long fptrdiff_t;
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#ifdef _KERNEL
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void mcount(uintfptr_t frompc, uintfptr_t selfpc);
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#else /* !_KERNEL */
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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#ifdef __GNUCLIKE_ASM
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void mcount(void) __asm(".mcount");
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#endif
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__END_DECLS
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#endif /* _KERNEL */
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#endif /* !_MACHINE_PROFILE_H_ */
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