2 * Copyright (c) 2005 The Regents of The University of Michigan
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 * Authors: Nathan Binkert
33 #include "arch/alpha/isa_traits.hh"
34 #include "arch/alpha/stacktrace.hh"
35 #include "arch/alpha/vtophys.hh"
36 #include "base/bitfield.hh"
37 #include "base/trace.hh"
38 #include "cpu/base.hh"
39 #include "cpu/thread_context.hh"
40 #include "sim/system.hh"
43 using namespace AlphaISA
;
45 ProcessInfo::ProcessInfo(ThreadContext
*_tc
)
52 vp
= tc
->getVirtPort();
54 if (!tc
->getSystemPtr()->kernelSymtab
->findAddress("thread_info_size", addr
))
55 panic("thread info not compiled into kernel\n");
56 thread_info_size
= vp
->readGtoH
<int32_t>(addr
);
58 if (!tc
->getSystemPtr()->kernelSymtab
->findAddress("task_struct_size", addr
))
59 panic("thread info not compiled into kernel\n");
60 task_struct_size
= vp
->readGtoH
<int32_t>(addr
);
62 if (!tc
->getSystemPtr()->kernelSymtab
->findAddress("thread_info_task", addr
))
63 panic("thread info not compiled into kernel\n");
64 task_off
= vp
->readGtoH
<int32_t>(addr
);
66 if (!tc
->getSystemPtr()->kernelSymtab
->findAddress("task_struct_pid", addr
))
67 panic("thread info not compiled into kernel\n");
68 pid_off
= vp
->readGtoH
<int32_t>(addr
);
70 if (!tc
->getSystemPtr()->kernelSymtab
->findAddress("task_struct_comm", addr
))
71 panic("thread info not compiled into kernel\n");
72 name_off
= vp
->readGtoH
<int32_t>(addr
);
78 ProcessInfo::task(Addr ksp
) const
80 Addr base
= ksp
& ~0x3fff;
81 if (base
== ULL(0xfffffc0000000000))
88 vp
= tc
->getVirtPort();
89 tsk
= vp
->readGtoH
<Addr
>(base
+ task_off
);
96 ProcessInfo::pid(Addr ksp
) const
98 Addr task
= this->task(ksp
);
106 vp
= tc
->getVirtPort();
107 pd
= vp
->readGtoH
<uint16_t>(task
+ pid_off
);
114 ProcessInfo::name(Addr ksp
) const
116 Addr task
= this->task(ksp
);
121 CopyStringOut(tc
, comm
, task
+ name_off
, sizeof(comm
));
128 StackTrace::StackTrace()
133 StackTrace::StackTrace(ThreadContext
*_tc
, StaticInstPtr inst
)
139 StackTrace::~StackTrace()
144 StackTrace::trace(ThreadContext
*_tc
, bool is_call
)
148 bool usermode
= (tc
->readMiscReg(AlphaISA::IPR_DTB_CM
) & 0x18) != 0;
150 Addr pc
= tc
->readNextPC();
151 bool kernel
= tc
->getSystemPtr()->kernelStart
<= pc
&&
152 pc
<= tc
->getSystemPtr()->kernelEnd
;
155 stack
.push_back(user
);
160 stack
.push_back(console
);
164 SymbolTable
*symtab
= tc
->getSystemPtr()->kernelSymtab
;
165 Addr ksp
= tc
->readIntReg(TheISA::StackPointerReg
);
166 Addr bottom
= ksp
& ~0x3fff;
170 if (!symtab
->findNearestAddr(pc
, addr
))
171 panic("could not find address %#x", pc
);
173 stack
.push_back(addr
);
180 while (ksp
> bottom
) {
181 if (!symtab
->findNearestAddr(pc
, addr
))
182 panic("could not find symbol for pc=%#x", pc
);
183 assert(pc
>= addr
&& "symbol botch: callpc < func");
185 stack
.push_back(addr
);
190 if (decodePrologue(ksp
, pc
, addr
, size
, ra
)) {
195 stack
.push_back(unknown
);
202 stack
.push_back(unknown
);
206 bool kernel
= tc
->getSystemPtr()->kernelStart
<= pc
&&
207 pc
<= tc
->getSystemPtr()->kernelEnd
;
211 if (stack
.size() >= 1000)
212 panic("unwinding too far");
215 panic("unwinding too far");
219 StackTrace::isEntry(Addr addr
)
221 if (addr
== tc
->readMiscReg(AlphaISA::IPR_PALtemp12
))
224 if (addr
== tc
->readMiscReg(AlphaISA::IPR_PALtemp7
))
227 if (addr
== tc
->readMiscReg(AlphaISA::IPR_PALtemp11
))
230 if (addr
== tc
->readMiscReg(AlphaISA::IPR_PALtemp21
))
233 if (addr
== tc
->readMiscReg(AlphaISA::IPR_PALtemp9
))
236 if (addr
== tc
->readMiscReg(AlphaISA::IPR_PALtemp2
))
243 StackTrace::decodeStack(MachInst inst
, int &disp
)
245 // lda $sp, -disp($sp)
247 // Opcode<31:26> == 0x08
251 const MachInst mem_mask
= 0xffff0000;
252 const MachInst lda_pattern
= 0x23de0000;
253 const MachInst lda_disp_mask
= 0x0000ffff;
255 // subq $sp, disp, $sp
256 // addq $sp, disp, $sp
258 // Opcode<31:26> == 0x10
262 // Func<11:5> == 0x20 (addq)
263 // Func<11:5> == 0x29 (subq)
265 const MachInst intop_mask
= 0xffe01fff;
266 const MachInst addq_pattern
= 0x43c0141e;
267 const MachInst subq_pattern
= 0x43c0153e;
268 const MachInst intop_disp_mask
= 0x001fe000;
269 const int intop_disp_shift
= 13;
271 if ((inst
& mem_mask
) == lda_pattern
)
272 disp
= -sext
<16>(inst
& lda_disp_mask
);
273 else if ((inst
& intop_mask
) == addq_pattern
)
274 disp
= -int((inst
& intop_disp_mask
) >> intop_disp_shift
);
275 else if ((inst
& intop_mask
) == subq_pattern
)
276 disp
= int((inst
& intop_disp_mask
) >> intop_disp_shift
);
284 StackTrace::decodeSave(MachInst inst
, int ®
, int &disp
)
286 // lda $stq, disp($sp)
288 // Opcode<31:26> == 0x08
292 const MachInst stq_mask
= 0xfc1f0000;
293 const MachInst stq_pattern
= 0xb41e0000;
294 const MachInst stq_disp_mask
= 0x0000ffff;
295 const MachInst reg_mask
= 0x03e00000;
296 const int reg_shift
= 21;
298 if ((inst
& stq_mask
) == stq_pattern
) {
299 reg
= (inst
& reg_mask
) >> reg_shift
;
300 disp
= sext
<16>(inst
& stq_disp_mask
);
309 * Decode the function prologue for the function we're in, and note
310 * which registers are stored where, and how large the stack frame is.
313 StackTrace::decodePrologue(Addr sp
, Addr callpc
, Addr func
,
319 for (Addr pc
= func
; pc
< callpc
; pc
+= sizeof(MachInst
)) {
321 CopyOut(tc
, (uint8_t *)&inst
, pc
, sizeof(MachInst
));
324 if (decodeStack(inst
, disp
)) {
326 // panic("decoding frame size again");
330 } else if (decodeSave(inst
, reg
, disp
)) {
331 if (!ra
&& reg
== ReturnAddressReg
) {
332 CopyOut(tc
, (uint8_t *)&ra
, sp
+ disp
, sizeof(Addr
));
334 // panic("no return address value pc=%#x\n", pc);
348 StringWrap
name(tc
->getCpuPtr()->name());
349 SymbolTable
*symtab
= tc
->getSystemPtr()->kernelSymtab
;
351 DPRINTFN("------ Stack ------\n");
354 for (int i
= 0, size
= stack
.size(); i
< size
; ++i
) {
355 Addr addr
= stack
[size
- i
- 1];
358 else if (addr
== console
)
360 else if (addr
== unknown
)
363 symtab
->findSymbol(addr
, symbol
);
365 DPRINTFN("%#x: %s\n", addr
, symbol
);