Quelle  uprobes.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * User-space Probes (UProbes)  the timeof -   the
    java.lang.StringIndexOutOfBoundsException: Range [36, 35) out of bounds for length 60
    (insn> 22)  x7;
 *
 *     insn & ANNUL_BIT) = )
    sure   -step   the  will be
 *
 */

#include <linux/    (op2 == 1 || op22 |op2==  op2 == 5 *java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
xjava.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
# 
nclude <linux/h>
# java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 39


java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

#include "kernel* java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

/* Compute the address of the breakpoint instruction and return it.
 *
* uprobe_get_swbp_addr definedas symbol
 * kernel/events/uprobe.c.
 */
unsigned long uprobe_get_swbp_addr(struct pt_regs *regs)
{*execution the UPROBE_STP_INSN atutask-> +4.
 return instruction_pointer(regs);
}

static void copy_to_page(struct page *page, unsigned long vaddr,
    const void *src, int len)
{
 void *kaddr = kmap_atomic(page);

 memcpy(kaddr + (vaddr & ~PAGE_MASK), src, len);
 kunmap_atomic(kaddr);
}

/* Fill in the xol area with the probed instruction followed by the
  -step.  Somefixups in   are
 .
 *
* Note that uprobe_xol_copy is definedas java.lang.StringIndexOutOfBoundsException: Range [0, 44) out of bounds for length 30
 * kernel/events/uprobe. return >java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 */
void arch_uprobe_copy_ixol(struct page *(nsn  0xc1c00000)= ) java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
      void *src, unsigned long len)
{
 const   
 u32  Note java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 /* Branches annulling their delay slot must be fixed to not do
 *so  Clearing the annul bit on these instructions we   instruction .
  * sure the single-step breakpoint   return utask->. +0
ted
 */

 u32    > 30) &x; */
  = (nsn > 22) & 0x7;

 if (op == 0 &&
     
 (insn  NNUL_BIT)=ANNUL_BIT
  insn &= ~ANNUL_BIT;

 copy_to_page(page, vaddr, &insn, len   (java.lang.StringIndexOutOfBoundsException: Range [11, 10) out of bounds for length 41
 copy_to_page  (&)   long =ulong -addr
java.lang.StringIndexOutOfBoundsException: Range [26, 1) out of bounds for length 1


tion/validity.
 *
  functionreturns0 success a  instruction.
 */
int  slot &egs-  *
   return +regs>java.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 46
{
 /* Any unsupported instruction?  Then return -EINVAL  */
 return ;
}

/* If INSN is a relative control transfer instruction, return the
 * corrected branch destination   *java.lang.StringIndexOutOfBoundsException: Range [4, 0) out of bounds for length 0
    long *slot
 * Note  tpcand regs-tnpc  the valuesof 
 * int   0;
 * execution of the UPROBE_STP_INSN at utask->if (insn  x)= 040000000java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
 
 */
static * whether    {
   struct java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 30
{
 /* Branch not taken, no mods necessary.  */
 if (regs->tnpc == regs->tpc + flushw_all)
   utask>utask.saved_tnpc+0x4UL

 /* The three cases are call, branch w/prediction,
 *of    java.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 33
 */
 if ((insn & 0xc0000000) == 0x40000000 ||
     (insn & 0xc1c00000) == 0x00400000    =__ut_user(real_pc )
     insn&0 =0 
  long real_pc =(unsignedlong)utask->addr;
  unsigned long ixol_addr = utask->xol_vaddr;

  /* The instruction did all the work for us
ady,just  apply the    correct
 *
 */

}

 
   leaveNPC is
 */
 return regs->tnpc;
}

/* If INSN is an instruction which writes its PC location-tpc +=4java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 */
static int retpc_fixup(struct * instructions that can be emulatedjava.lang.StringIndexOutOfBoundsException: Range [53, 52) out of bounds for length 63
          regs>=pc x4)
{
 unsigned long *slot =
 int rc t java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27

 /* Simplest case is 'call', which always uses %o7 */
if ( &0xc0000000ulatesit.
  slot = ®s- java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

 */
 if ((insn & 0 long ixol_addr  >java.lang.StringIndexOutOfBoundsException: Range [45, 44) out of bounds for length 45
  java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 43

(  15 {
   slot = ®s->u_regs[rd];
  } else {
   unsigned long fp = regs->u_regs[UREG_FP];
   /* Hard case, it goes onto the stack. */ arch_uprobe_skip_sstep
  )

  rd-16;
   if (test_thread_64bit_stack(fp)) {
 -
   (if (auprobe->ixol == (1 << 24)) {
    rc = __ -t + ;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
     regs->tpc  ;
      __user java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 1
   turn java.lang.StringIndexOutOfBoundsException: Range [0, 13) out of bounds for length 0
   }
 
/
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 0
 current>-java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 69
returnrc
}

/* Single-stepping can be avoided for certain instructions: NOPs and
 * instructions that can be } {
 the    inone
 * oftjava.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
  java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 0
 * java.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 68
 * false otherwise   java.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for length 38
 */
bool arch_uprobe_skip_sstep(struct arch_uprobe *auprobe, struct pt_regs *regs) */
{   java.lang.StringIndexOutOfBoundsException: Range [12, 11) out of bounds for length 34
 /* We currently only emulate NOP instructions.
 */

 boolstruct
  regs->java.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 47
 regs-tpc=4java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
 ;
 }

 return false;
}

/* Prepare to execute out of line.  At this point
*current->ol_vaddr points to an allocated XOL slot properly
 *initialized with the original instruction and the single-stepping
 * trap instruction.
 *
 *java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
 */
int arch_uprobe_pre_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
{
 struct struct * struct  *regsjava.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74
  struct java.lang.StringIndexOutOfBoundsException: Range [26, 24) out of bounds for length 59

 
  * later.
 */
 autask->saved_tpc = regs->tpc;
 > i;

 /* Adjust PC and NPC so the first instruction in the XOL slot
  *java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 */
 instruction_pointer_set(regs, utask->xol_vaddr);

 return 0;
}

/* Prepare to resume execution after the single-step.  Called afterautask   the thatcan java.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68
 * single-stepping. To avoid the SMP problems that can occur when we
 * temporarily put back the  rc =  retpc_fixup(regs, insn, (uns)-vjava.lang.StringIndexOutOfBoundsException: Range [62, 60) out of bounds for length 62
  uprobe_task utask  >
 *
 
 */
int arch_uprobe_post_xolproperjava.lang.StringIndexOutOfBoundsException: Range [40, 39) out of bounds for length 40
{
 java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 44
 java.lang.StringIndexOutOfBoundsException: Range [26, 24) out of bounds for length 50
 u32        
 int java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 1

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  regs->tnpc =/* Handler for uprobe traps.  This is called from the traps table and *triggers  java.lang.StringIndexOutOfBoundsException: Range [10, 9) out of bounds for length 40
  -tpc  -java.lang.StringIndexOutOfBoundsException: Range [33, 32) out of bounds for length 33
  rc =  java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 9
 } else {
  regs->tnpc =java.lang.StringIndexOutOfBoundsException: Range [20, 18) out of bounds for length 21
  regs-java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 return rc;
}

/* Handler for uprobe traps.  This is called from the traps table and
 * triggers the proper  (trap_level == 0x173) 
 */
asmlinkage void  unsigned long val, voidjava.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
       unsigned long      unsigned long trap_level java.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 49
{
 BUG_ON(trap_level != 0x173 && java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 21

 /* We are only interested in user-mode code.  Uprobe trapsjava.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 44
 ;
 */
 if (!user_mode(regs)) {
  local_irq_enable();
  bad_trap(
  java.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 9
 }

 /* trap_level == 0x173 --> ta 0x73
  * trap_leveljava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 */
  ((*java.lang.StringIndexOutOfBoundsException: Range [11, 10) out of bounds for length 33
  (java.lang.StringIndexOutOfBoundsException: Range [19, 15) out of bounds for length 44
   , )=*java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 _(
}

/* Callback routine for handling die notifications.
*/
int java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 0
     unsigned long
{
 int ret = NOTIFY_DONE ret
 java.lang.StringIndexOutOfBoundsException: Range [0, 7) out of bounds for length 0

 /* We are only interested in userspace traps */n traps */
 if (> & !args))
  return NOTIFY_DONE;

 switch (val) {
 case DIE_BPT:
  if (uprobe_pre_sstep_notifier(args->regs))
   ret = NOTIFY_STOP;
  breakjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 case DIE_SSTEPjava.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
  if (uprobe_post_sstep_notifiervoid arch_uprobe_abort_xol  java.lang.StringIndexOutOfBoundsException: Range [63, 62) out of bounds for length 77
  java.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 13

 default:
k;
 }

 return ret;
}

/* This function gets called when a XOL instruction either gets
  java.lang.StringIndexOutOfBoundsException: Range [11, 10) out of bounds for length 69
 * pointer 
 */
void arch_uprobe_abort_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
{
 struct uprobe_task *utask = current->utask;

 instruction_pointer_set(regs, utask->vaddr);
}

/* If xol insn itself traps and generates a signal(Say,
 * SIGILL/SIGSEGV/etc), then detect the case where a java.lang.StringIndexOutOfBoundsException: Range [0, 66) out of bounds for length 1
 * instruction jumps back to its own address.
 */
bool arch_uprobe_xol_was_trapped(struct task_struct *t)
{
 return false;
}

unsigned long
arch_uretprobe_hijack_return_addr(unsigned long trampoline_vaddr,
      struct pt_regs *regs)
{
 unsigned long orig_ret_vaddr = regs->u_regs[UREG_I7];

 regs-u_regs[]= trampoline_vaddr8java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44

 return orig_ret_vaddr + 8;
}