bsd/dev/i386/sdt_x86.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 /* #pragma ident        "@(#)sdt.c      1.9     08/07/01 SMI" */
  27
  28 #ifdef KERNEL
  29 #ifndef _KERNEL
  30 #define _KERNEL /* Solaris vs. Darwin */
  31 #endif
  32 #endif
  33
  34 #define MACH__POSIX_C_SOURCE_PRIVATE 1 /* pulls in suitable savearea from mach/ppc/thread_status.h */
  35 #include <kern/cpu_data.h>
  36 #include <kern/thread.h>
  37 #include <mach/thread_status.h>
  38 #include <mach/vm_param.h>
  39
  40 #include <sys/dtrace.h>
  41 #include <sys/dtrace_impl.h>
  42
  43 #include <sys/dtrace_glue.h>
  44
  45 #include <sys/sdt_impl.h>
  46
  47 extern sdt_probe_t      **sdt_probetab;
  48
  49 #if defined(__i386__)
  50 /*ARGSUSED*/
  51 int
  52 sdt_invop(uintptr_t addr, uintptr_t *stack, uintptr_t eax)
  53 {
  54 #pragma unused(eax)
  55         uintptr_t stack0 = 0, stack1 = 0, stack2 = 0, stack3 = 0, stack4 = 0;
  56         sdt_probe_t *sdt = sdt_probetab[SDT_ADDR2NDX(addr)];
  57
  58         for (; sdt != NULL; sdt = sdt->sdp_hashnext) {
  59                 if ((uintptr_t)sdt->sdp_patchpoint == addr) {
  60                         uintptr_t *stacktop;
  61                         if (CPU_ON_INTR(CPU))
  62                                 stacktop = (uintptr_t *)dtrace_get_cpu_int_stack_top();
  63                         else
  64                                 stacktop = (uintptr_t *)(dtrace_get_kernel_stack(current_thread()) + kernel_stack_size);
  65
  66             if (stack <= stacktop)
  67                 stack0 = *stack++;
  68             if (stack <= stacktop)
  69                 stack1 = *stack++;
  70             if (stack <= stacktop)
  71                 stack2 = *stack++;
  72             if (stack <= stacktop)
  73                 stack3 = *stack++;
  74             if (stack <= stacktop)
  75                 stack4 = *stack++;
  76
  77                         dtrace_probe(sdt->sdp_id, stack0, stack1, stack2, stack3, stack4);
  78
  79                         return (DTRACE_INVOP_NOP);
  80                 }
  81         }
  82
  83         return (0);
  84 }
  85 #elif defined(__x86_64__)
  86 /*ARGSUSED*/
  87 int
  88 sdt_invop(uintptr_t addr, uintptr_t *stack, uintptr_t eax)
  89 {
  90 #pragma unused(eax)
  91         sdt_probe_t *sdt = sdt_probetab[SDT_ADDR2NDX(addr)];
  92
  93         for (; sdt != NULL; sdt = sdt->sdp_hashnext) {
  94                 if ((uintptr_t)sdt->sdp_patchpoint == addr) {
  95                         x86_saved_state64_t *regs = (x86_saved_state64_t *)stack;
  96
  97                         dtrace_probe(sdt->sdp_id, regs->rdi, regs->rsi, regs->rdx, regs->rcx, regs->r8);
  98
  99                         return (DTRACE_INVOP_NOP);
 100                 }
 101         }
 102
 103         return (0);
 104 }
 105 #else
 106 #error Unknown arch
 107 #endif
 108
 109