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--- xnu/xnu-1228/libkern/gen/OSDebug.cpp
+++ /dev/null
@@ -1,253 +0,0 @@
-/*
- * Copyright (c) 2005 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the License
- * may not be used to create, or enable the creation or redistribution of,
- * unlawful or unlicensed copies of an Apple operating system, or to
- * circumvent, violate, or enable the circumvention or violation of, any
- * terms of an Apple operating system software license agreement.
- *
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
- */
-
-// NOTE: This file is only c++ so I can get static initialisers going
-#include <libkern/OSDebug.h>
-
-#include <sys/cdefs.h>
-
-#include <stdarg.h>
-#include <mach/mach_types.h>
-#include <mach/kmod.h>
-#include <kern/lock.h>
-
-#include <libkern/libkern.h> // From bsd's libkern directory
-#include <mach/vm_param.h>
-
-#include <sys/kdebug.h>
-extern int etext;
-__BEGIN_DECLS
-// From osmfk/kern/thread.h but considered to be private
-extern vm_offset_t min_valid_stack_address(void);
-extern vm_offset_t max_valid_stack_address(void);
-
-// From osfmk/kmod.c
-extern void kmod_dump_log(vm_offset_t *addr, unsigned int cnt);
-
-extern addr64_t kvtophys(vm_offset_t va);
-#if __arm__
-extern int copyinframe(vm_address_t fp, uint32_t *frame);
-#endif
-
-__END_DECLS
-
-static mutex_t *sOSReportLock = mutex_alloc(0);
-
-/* Use kernel_debug() to log a backtrace */
-void
-trace_backtrace(unsigned int debugid, unsigned int debugid2, int size, int data) {
- void *bt[16];
- const unsigned cnt = sizeof(bt) / sizeof(bt[0]);
- unsigned i;
- int found = 0;
-
- OSBacktrace(bt, cnt);
-
- /* find first non-kernel frame */
- for (i = 3; i < cnt && bt[i]; i++) {
- if (bt[i] > (void*)&etext) {
- found = 1;
- break;
- }
- }
- /*
- * if there are non-kernel frames, only log these
- * otherwise, log everything but the first two
- */
- if (!found) i=2;
-
-#define safe_bt(a) (int)(a<cnt ? bt[a] : 0)
- kernel_debug(debugid, data, size, safe_bt(i), safe_bt(i+1), 0);
- kernel_debug(debugid2, safe_bt(i+2), safe_bt(i+3), safe_bt(i+4), safe_bt(i+5), 0);
-}
-
-/* Report a message with a 4 entry backtrace - very slow */
-void
-OSReportWithBacktrace(const char *str, ...)
-{
- char buf[128];
- void *bt[9];
- const unsigned cnt = sizeof(bt) / sizeof(bt[0]);
- va_list listp;
-
- // Ignore the our and our callers stackframes, skipping frames 0 & 1
- (void) OSBacktrace(bt, cnt);
-
- va_start(listp, str);
- vsnprintf(buf, sizeof(buf), str, listp);
- va_end(listp);
-
- mutex_lock(sOSReportLock);
- {
- printf("%s\nBacktrace %p %p %p %p %p %p %p\n",
- buf, bt[2], bt[3], bt[4], bt[5], bt[6], bt[7], bt[8]);
- kmod_dump_log((vm_offset_t *) &bt[2], cnt - 2);
- }
- mutex_unlock(sOSReportLock);
-}
-
-static vm_offset_t minstackaddr = min_valid_stack_address();
-static vm_offset_t maxstackaddr = max_valid_stack_address();
-
-#if __i386__
-#define i386_RETURN_OFFSET 4
-
-static unsigned int
-i386_validate_stackptr(vm_offset_t stackptr)
-{
- /* Existence and alignment check
- */
- if (!stackptr || (stackptr & 0x3))
- return 0;
-
- /* Is a virtual->physical translation present?
- */
- if (!kvtophys(stackptr))
- return 0;
-
- /* Check if the return address lies on the same page;
- * If not, verify that a translation exists.
- */
- if (((PAGE_SIZE - (stackptr & PAGE_MASK)) < i386_RETURN_OFFSET) &&
- !kvtophys(stackptr + i386_RETURN_OFFSET))
- return 0;
- return 1;
-}
-
-static unsigned int
-i386_validate_raddr(vm_offset_t raddr)
-{
- return ((raddr > VM_MIN_KERNEL_ADDRESS) &&
- (raddr < VM_MAX_KERNEL_ADDRESS));
-}
-#endif
-
-unsigned OSBacktrace(void **bt, unsigned maxAddrs)
-{
- unsigned frame;
-
-#if __ppc__
- vm_offset_t stackptr, stackptr_prev;
- const vm_offset_t * const mem = (vm_offset_t *) 0;
- unsigned i = 0;
-
- __asm__ volatile("mflr %0" : "=r" (stackptr));
- bt[i++] = (void *) stackptr;
-
- __asm__ volatile("mr %0,r1" : "=r" (stackptr));
- for ( ; i < maxAddrs; i++) {
- // Validate we have a reasonable stackptr
- if ( !(minstackaddr <= stackptr && stackptr < maxstackaddr)
- || (stackptr & 3))
- break;
-
- stackptr_prev = stackptr;
- stackptr = mem[stackptr_prev >> 2];
- if ((stackptr_prev ^ stackptr) > 8 * 1024) // Sanity check
- break;
-
- vm_offset_t addr = mem[(stackptr >> 2) + 2];
- if ((addr & 3) || (addr < 0x8000)) // More sanity checks
- break;
- bt[i] = (void *) addr;
- }
- frame = i;
-
- for ( ; i < maxAddrs; i++)
- bt[i] = (void *) 0;
-#elif __i386__
-#define SANE_i386_FRAME_SIZE 8*1024
- vm_offset_t stackptr, stackptr_prev, raddr;
- unsigned frame_index = 0;
-/* Obtain current frame pointer */
- __asm__ volatile("movl %%ebp, %0" : "=m" (stackptr));
-
- if (!i386_validate_stackptr(stackptr))
- goto pad;
-
- raddr = *((vm_offset_t *) (stackptr + i386_RETURN_OFFSET));
-
- if (!i386_validate_raddr(raddr))
- goto pad;
-
- bt[frame_index++] = (void *) raddr;
-
- for ( ; frame_index < maxAddrs; frame_index++) {
- stackptr_prev = stackptr;
- stackptr = *((vm_offset_t *) stackptr_prev);
-
- if (!i386_validate_stackptr(stackptr))
- break;
- /* Stack grows downwards */
- if (stackptr < stackptr_prev)
- break;
-
- if ((stackptr_prev ^ stackptr) > SANE_i386_FRAME_SIZE)
- break;
-
- raddr = *((vm_offset_t *) (stackptr + i386_RETURN_OFFSET));
-
- if (!i386_validate_raddr(raddr))
- break;
-
- bt[frame_index] = (void *) raddr;
- }
-pad:
- frame = frame_index;
-
- for ( ; frame_index < maxAddrs; frame_index++)
- bt[frame_index] = (void *) 0;
-#elif __arm__
- uint32_t i= 0;
- uint32_t frameb[2];
- uint32_t fp= 0;
-
- // get the current frame pointer for this thread
- __asm__ volatile("mov %0,r7" : "=r" (fp));
-
- // now crawl up the stack recording the link value of each frame
- do {
- // check bounds
- if ((fp == 0) || ((fp & 3) != 0) || (fp > VM_MAX_KERNEL_ADDRESS) || (fp < VM_MIN_KERNEL_ADDRESS)) {
- break;
- }
- // safely read frame
- if (copyinframe(fp, frameb) != 0) {
- break;
- }
-
- // No need to use copyin as this is always a kernel address, see check above
- bt[i] = (void*)frameb[1]; // link register
- fp = frameb[0];
- } while (++i < maxAddrs);
- frame= i;
-#else
-#error arch
-#endif
- return frame;
-}