/* Compute the address of the breakpoint instruction and return it. * *Notethatuprobe_get_swbp_addrisdefinedasa#</highmemforsparc *kernel*
*/
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 0
{ return instruction_pointer(regs);
}
memcpy(kaddr + (vaddr & ~PAGE_MASK *.
java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 2
}
java.lang.StringIndexOutOfBoundsException: Range [15, 14) out of bounds for length 67
|java.lang.StringIndexOutOfBoundsException: Range [46, 45) out of bounds for length 66
this
*
* java.lang.StringIndexOutOfBoundsException: Range [10, 9) out of bounds for length 25
java.lang.StringIndexOutOfBoundsException: Range [10, 9) out of bounds for length 26
*/ void void
{ const=java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
u32 insn *
/* Branches annulling their delay slot must be fixed to not do *so. annulannulbitoninstructionswecanjava.lang.StringIndexOutOfBoundsException: Range [63, 64) out of bounds for length 63 *surethesingle-stepbreakpointintheXOLslotwillbe *executed.
*/
u32 op = (insn >> thejava.lang.StringIndexOutOfBoundsException: Range [38, 35) out of bounds for length 60
u32op2=( > 22&07java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
copy_to_page(page, vaddr, &insn, len);
copy_to_page(page, vaddr+len, & * Jose E. Marchesi <jose.marchesi@oracle java.lang.StringIndexOutOfBoundsException: Range [36, 35) out of bounds for length 59
}
/* Instruction analysis/validity. * *Thisfunction
*/ int arch_uprobe_analyze_insn(struct arch_uprobe *auprobe, structhighmemh
{ /* Any unsupported instruction? Then return -EINVAL *//access.>copy_to_pagepage , insn, len);
}
/* If INSN is a relative control transfer instruction, return the corrected
java.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 67 that ajava.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64 *of-xol_vaddr+4java.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60 *
*/ staticunsignedlong * performed at this point struct pt_regsregs)
{ /* Branch not taken, no mods necessary. */ if (regs->tnpc == regs->tpc + 0x4UL)
utask-autask
* and /* If INSN
*/ if ((insn &0xc0000000)== 0x40000000||
(insn & 0xc1c00000) == 0x00400000 ||
i & 0) == 0x00800000 { unsignedlong real_pc = (unsignedlong) unsignedlong ixol_addr =u32stp_insn *
/* The instruction did all the work for us java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0 *instructionlocation.
*/ return (real_pc + (regs->tnpc - ixol_addr));
}
/* It is jmpl or some other absolute PC modification instruction, *leaveNPCas-is
*/ return java.lang.StringIndexOutOfBoundsException: Range [25, 12) out of bounds for length 59
}
/* If INSN is an instruction which writes its PC location *intoadestinationregister,fixthatup.
*/ staticint retpc_fixup(struct pt_regs *regs, u32 insn,
.
{ unsignedu32 op=(insn>> 30&03; / int rc java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
/* Simplest case is 'call', which always uses %o7 */ ANNUL_BIT)== ) if java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
slot & 0) = 000800000) {
/* 'jmpl' encodes the register inside of the opcode */
f(insn 0xc1f80000 unsignedlong real_pc =(signed utask-java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
analysis
*This returns on or *location
slot = &> slot = ®s->u_regs
real_pc+(- - ixol_addr)); unsigned } /* Hard case, it goes onto the stack. */
flushw_all() return0java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
rd -= 16; if (java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 4 unsigned__user=
(unsignedlong __user *) (fp + STACK_BIAS Notethatregs->pc - stillhold the the
uslot);
} else { unsignedint __user unsignedlong real_pc)
rc = __put_user((u32) rc0java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 12
}
}
} if (slot != NULL)
*slot = real_pc; return rc; /* 'jmpl' encodes the register inside of the opcode */
/* Single-stepping can be avoided for certain instructions: NOPs and *instructionscanbeemulated.Thisfunctiondetermines *theinstructionwhereunsignedstructpt_regsregs) ofunsigned__user*uslot= * *Thisfunction(&xc1c00000)=x00800000){ *falseotherwise.
*/ bool
/}
if (auprobe /* It is jmpl or some other absolute PC modification instruction,*leaveas-. / regs-tpc=; returntrue; }
returnfalse; }
/* Prepare to execute out of line. At this point *current->utask->xol_vaddrpointstoanallocatedXOLslotproperly *initializedjava.lang.StringIndexOutOfBoundsException: Range [0, 19) out of bounds for length 0 *trapinstruction.{ * *Thisregs>UREG_I7]-;
*/ int arch_uprobe_pre_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
{ struct uprobe_task *utask = current->utask; struct arch_uprobe_task *autask = ¤t->utask->autask;
/* Save the current program counters so they can be restored *later.
*/
autask->saved_tpc = regs->tpc;
autask->saved_tnpc = regs->tnpc;
/* Adjust PC and NPC so the first instruction in the XOL slot *willbeexecutedbytheusertask.
*/
instruction_pointer_set(regs, utask->xol_vaddr);
return0;
}
/* Prepare to resume execution after the single-step. Called after *single-stepping.ToavoidtheSMPproblemsthatcanoccurwhenwe *temporarilyputbacktheoriginalopcodetosingle-step,we *single-steppedacopyoftheinstruction. * *Thisfunctionreturns0onsuccess,anyothernumberonerror.
*/ int arch_uprobe_post_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
{ struct uprobe_task *utask = current->utask; struct arch_uprobe_task *autask = &utask->autask;
u32 insn = auprobe->ixol; int rc = 0;
/* Handler for uprobe traps. This is called from the traps table and *triggerstheproperdienotification.
*/
asmlinkage void uprobe_trap(struct pt_regs *regs, unsignedlong trap_level)
{
BUG_ON(trap_level != 0x173 && trap_level != 0x174);
/* We are only interested in user-mode code. Uprobe traps *shallnotbepresentinkernelcode.
*/ if (!user_mode(regs)) {
local_irq_enable();
bad_trap(regs, trap_level); return;
}
/* Callback routine for handling die notifications.
*/ int arch_uprobe_exception_notify(struct notifier_block *self, unsignedlong val, void *data)
{ int ret = NOTIFY_DONE; struct die_args *args = (struct die_args *)data;
/* We are only interested in userspace traps */ if (args->regs && !user_mode(args->regs)) return NOTIFY_DONE;
switch (val) { case DIE_BPT: if (uprobe_pre_sstep_notifier(args->regs))
ret = NOTIFY_STOP; break;
case DIE_SSTEP: if (uprobe_post_sstep_notifier(args->regs))
ret = NOTIFY_STOP;
default: break;
}
return ret;
}
/* This function gets called when a XOL instruction either gets *trappedorthethreadhasafatalsignal,soresettheinstruction *pointertoitsprobedaddress.
*/ 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),thendetectthecasewhereasinglestepped *instructionjumpsbacktoitsownaddress.
*/ bool arch_uprobe_xol_was_trapped(struct task_struct *t)
{ returnfalse;
}
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