2 * Copyright (c) 2005, Joseph Koshy
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
34 #include <sys/systm.h>
36 #include <machine/cpu.h>
37 #include <machine/md_var.h>
38 #include <machine/pmc_mdep.h>
39 #include <machine/stack.h>
42 #include <vm/vm_param.h>
45 /* XXX: Userland code compiled with gcc will need an heuristic
46 * to be correctly detected.
59 #ifdef CPU_XSCALE_IXP425
60 if (cpu_class == CPU_CLASS_XSCALE)
61 return pmc_xscale_initialize();
64 if (cpu_class == CPU_CLASS_CORTEXA)
65 return pmc_armv7_initialize();
71 pmc_md_finalize(struct pmc_mdep *md)
73 #ifdef CPU_XSCALE_IXP425
74 if (cpu_class == CPU_CLASS_XSCALE)
75 pmc_xscale_finalize(md);
77 KASSERT(0, ("[arm,%d] Unknown CPU Class 0x%x", __LINE__,
81 if (cpu_class == CPU_CLASS_CORTEXA)
82 pmc_armv7_finalize(md);
87 pmc_save_kernel_callchain(uintptr_t *cc, int maxsamples,
90 uintptr_t pc, r, stackstart, stackend, fp;
94 KASSERT(TRAPF_USERMODE(tf) == 0,("[arm,%d] not a kernel backtrace",
98 pc = PMC_TRAPFRAME_TO_PC(tf);
104 stackstart = (uintptr_t) td->td_kstack;
105 stackend = (uintptr_t) td->td_kstack + td->td_kstack_pages * PAGE_SIZE;
106 fp = PMC_TRAPFRAME_TO_FP(tf);
108 if (!PMC_IN_KERNEL(pc) ||
109 !PMC_IN_KERNEL_STACK(fp, stackstart, stackend))
112 for (count = 1; count < maxsamples; count++) {
113 /* Use saved lr as pc. */
114 r = fp + PC_OFF * sizeof(uintptr_t);
115 if (!PMC_IN_KERNEL_STACK(r, stackstart, stackend))
117 pc = *(uintptr_t *)r;
118 if (!PMC_IN_KERNEL(pc))
123 /* Switch to next frame up */
124 r = fp + FP_OFF * sizeof(uintptr_t);
125 if (!PMC_IN_KERNEL_STACK(r, stackstart, stackend))
127 fp = *(uintptr_t *)r;
128 if (!PMC_IN_KERNEL_STACK(fp, stackstart, stackend))
136 pmc_save_user_callchain(uintptr_t *cc, int maxsamples,
137 struct trapframe *tf)
139 uintptr_t pc, r, oldfp, fp;
143 KASSERT(TRAPF_USERMODE(tf), ("[x86,%d] Not a user trap frame tf=%p",
144 __LINE__, (void *) tf));
147 pc = PMC_TRAPFRAME_TO_PC(tf);
153 oldfp = fp = PMC_TRAPFRAME_TO_FP(tf);
155 if (!PMC_IN_USERSPACE(pc) ||
156 !PMC_IN_USERSPACE(fp))
159 for (count = 1; count < maxsamples; count++) {
160 /* Use saved lr as pc. */
161 r = fp + PC_OFF * sizeof(uintptr_t);
162 if (copyin((void *)r, &pc, sizeof(pc)) != 0)
164 if (!PMC_IN_USERSPACE(pc))
169 /* Switch to next frame up */
171 r = fp + FP_OFF * sizeof(uintptr_t);
172 if (copyin((void *)r, &fp, sizeof(fp)) != 0)
174 if (fp < oldfp || !PMC_IN_USERSPACE(fp))