d0d0192f83
On the i386 architecture, the processor only saves the current value of `%esp' on stack if a privilege switch is necessary when entering the interrupt handler. Thus, `frame->tf_esp' is only valid for an entry from user mode. For interrupts taken in kernel mode, we need to determine the top-of-stack for the interrupted kernel procedure by adding the appropriate offset to the current frame pointer. Reported by: kris, Fabien Thomas Tested by: Fabien Thomas <fabien.thomas at netasq dot com>
129 lines
4.3 KiB
C
129 lines
4.3 KiB
C
/*-
|
|
* Copyright (c) 2003-2005,2008 Joseph Koshy
|
|
* Copyright (c) 2007 The FreeBSD Foundation
|
|
* All rights reserved.
|
|
*
|
|
* Portions of this software were developed by A. Joseph Koshy under
|
|
* sponsorship from the FreeBSD Foundation and Google, Inc.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _MACHINE_PMC_MDEP_H
|
|
#define _MACHINE_PMC_MDEP_H 1
|
|
|
|
/*
|
|
* On the i386 platform we support the following PMCs.
|
|
*
|
|
* K7 AMD Athlon XP/MP and other 32 bit processors.
|
|
* K8 AMD Athlon64 and Opteron PMCs in 32 bit mode.
|
|
* PIV Intel P4/HTT and P4/EMT64
|
|
* PPRO Intel Pentium Pro, Pentium-II, Pentium-III, Celeron and
|
|
* Pentium-M processors
|
|
* PENTIUM Intel Pentium MMX.
|
|
*/
|
|
|
|
#include <dev/hwpmc/hwpmc_amd.h> /* K7 and K8 */
|
|
#include <dev/hwpmc/hwpmc_piv.h>
|
|
#include <dev/hwpmc/hwpmc_ppro.h>
|
|
#include <dev/hwpmc/hwpmc_pentium.h>
|
|
|
|
/*
|
|
* Architecture specific extensions to <sys/pmc.h> structures.
|
|
*/
|
|
|
|
union pmc_md_op_pmcallocate {
|
|
struct pmc_md_amd_op_pmcallocate pm_amd;
|
|
struct pmc_md_ppro_op_pmcallocate pm_ppro;
|
|
struct pmc_md_pentium_op_pmcallocate pm_pentium;
|
|
struct pmc_md_p4_op_pmcallocate pm_p4;
|
|
uint64_t __pad[4];
|
|
};
|
|
|
|
/* Logging */
|
|
#define PMCLOG_READADDR PMCLOG_READ32
|
|
#define PMCLOG_EMITADDR PMCLOG_EMIT32
|
|
|
|
#ifdef _KERNEL
|
|
|
|
/* MD extension for 'struct pmc' */
|
|
union pmc_md_pmc {
|
|
struct pmc_md_amd_pmc pm_amd;
|
|
struct pmc_md_ppro_pmc pm_ppro;
|
|
struct pmc_md_pentium_pmc pm_pentium;
|
|
struct pmc_md_p4_pmc pm_p4;
|
|
};
|
|
|
|
struct pmc;
|
|
|
|
#define PMC_TRAPFRAME_TO_PC(TF) ((TF)->tf_eip)
|
|
#define PMC_TRAPFRAME_TO_FP(TF) ((TF)->tf_ebp)
|
|
|
|
/*
|
|
* The layout of the stack frame on entry into the NMI handler depends on
|
|
* whether a privilege level change (and consequent stack switch) was
|
|
* required for entry.
|
|
*
|
|
* When processing an interrupt when in user mode, the processor switches
|
|
* stacks, and saves the user mode stack pointer on the kernel stack. The
|
|
* user mode stack pointer is then available to the interrupt handler
|
|
* at frame->tf_esp.
|
|
*
|
|
* When processing an interrupt while in kernel mode, the processor
|
|
* continues to use the existing (kernel) stack. Therefore we determine
|
|
* the stack pointer for the interrupted kernel procedure by adding an
|
|
* offset to the current frame pointer.
|
|
*/
|
|
|
|
#define PMC_TRAPFRAME_TO_USER_SP(TF) ((TF)->tf_esp)
|
|
#define PMC_TRAPFRAME_TO_KERNEL_SP(TF) ((uintptr_t) &((TF)->tf_esp))
|
|
|
|
#define PMC_IN_KERNEL_STACK(S,START,END) \
|
|
((S) >= (START) && (S) < (END))
|
|
#define PMC_IN_KERNEL(va) (((va) >= USRSTACK) && \
|
|
((va) < VM_MAX_KERNEL_ADDRESS))
|
|
|
|
#define PMC_IN_USERSPACE(va) ((va) <= VM_MAXUSER_ADDRESS)
|
|
|
|
#define PMC_IN_TRAP_HANDLER(PC) \
|
|
((PC) >= (uintptr_t) start_exceptions && \
|
|
(PC) < (uintptr_t) end_exceptions)
|
|
|
|
#define PMC_AT_FUNCTION_PROLOGUE_PUSH_BP(I) \
|
|
(((I) & 0x00ffffff) == 0xe58955) /* pushl %ebp; movl %esp,%ebp */
|
|
#define PMC_AT_FUNCTION_PROLOGUE_MOV_SP_BP(I) \
|
|
(((I) & 0x0000ffff) == 0xe589) /* movl %esp,%ebp */
|
|
#define PMC_AT_FUNCTION_EPILOGUE_RET(I) \
|
|
(((I) & 0xFF) == 0xC3) /* ret */
|
|
|
|
/*
|
|
* Prototypes
|
|
*/
|
|
|
|
void start_exceptions(void), end_exceptions(void);
|
|
void pmc_x86_lapic_enable_pmc_interrupt(void);
|
|
|
|
#endif /* _KERNEL */
|
|
#endif /* _MACHINE_PMC_MDEP_H */
|