A dummy implementation of stacktrace.cc to clear up linker errors.

--HG--
extra : convert_revision : ea1e54a529ad7ae4a6564dd6fb47c31fb0573adf

1 files changed, 371 insertions, 0 deletions

diff --git a/src/arch/sparc/stacktrace.cc b/src/arch/sparc/stacktrace.cc
new file mode 100644
index 000000000..0985eb149
--- /dev/null
+++ b/src/arch/sparc/stacktrace.cc
@@ -0,0 +1,371 @@
+/*
+ * Copyright (c) 2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Nathan Binkert
+ */
+
+#include <string>
+
+#include "arch/sparc/isa_traits.hh"
+#include "arch/sparc/stacktrace.hh"
+#include "arch/sparc/vtophys.hh"
+#include "base/bitfield.hh"
+#include "base/trace.hh"
+#include "cpu/base.hh"
+#include "cpu/thread_context.hh"
+#include "sim/system.hh"
+
+using namespace std;
+using namespace SparcISA;
+
+ProcessInfo::ProcessInfo(ThreadContext *_tc)
+    : tc(_tc)
+{
+    Addr addr = 0;
+
+    VirtualPort *vp;
+
+    vp = tc->getVirtPort();
+
+    if (!tc->getSystemPtr()->kernelSymtab->findAddress("thread_info_size", addr))
+        panic("thread info not compiled into kernel\n");
+    thread_info_size = vp->readGtoH<int32_t>(addr);
+
+    if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_size", addr))
+        panic("thread info not compiled into kernel\n");
+    task_struct_size = vp->readGtoH<int32_t>(addr);
+
+    if (!tc->getSystemPtr()->kernelSymtab->findAddress("thread_info_task", addr))
+        panic("thread info not compiled into kernel\n");
+    task_off = vp->readGtoH<int32_t>(addr);
+
+    if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_pid", addr))
+        panic("thread info not compiled into kernel\n");
+    pid_off = vp->readGtoH<int32_t>(addr);
+
+    if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_comm", addr))
+        panic("thread info not compiled into kernel\n");
+    name_off = vp->readGtoH<int32_t>(addr);
+
+    tc->delVirtPort(vp);
+}
+
+Addr
+ProcessInfo::task(Addr ksp) const
+{
+    Addr base = ksp & ~0x3fff;
+    if (base == ULL(0xfffffc0000000000))
+        return 0;
+
+    Addr tsk;
+
+    VirtualPort *vp;
+
+    vp = tc->getVirtPort();
+    tsk = vp->readGtoH<Addr>(base + task_off);
+    tc->delVirtPort(vp);
+
+    return tsk;
+}
+
+int
+ProcessInfo::pid(Addr ksp) const
+{
+    Addr task = this->task(ksp);
+    if (!task)
+        return -1;
+
+    uint16_t pd;
+
+    VirtualPort *vp;
+
+    vp = tc->getVirtPort();
+    pd = vp->readGtoH<uint16_t>(task + pid_off);
+    tc->delVirtPort(vp);
+
+    return pd;
+}
+
+string
+ProcessInfo::name(Addr ksp) const
+{
+    Addr task = this->task(ksp);
+    if (!task)
+        return "console";
+
+    char comm[256];
+    CopyStringOut(tc, comm, task + name_off, sizeof(comm));
+    if (!comm[0])
+        return "startup";
+
+    return comm;
+}
+
+StackTrace::StackTrace()
+    : tc(0), stack(64)
+{
+}
+
+StackTrace::StackTrace(ThreadContext *_tc, StaticInstPtr inst)
+    : tc(0), stack(64)
+{
+    trace(_tc, inst);
+}
+
+StackTrace::~StackTrace()
+{
+}
+
+void
+StackTrace::trace(ThreadContext *_tc, bool is_call)
+{
+#if 0
+    tc = _tc;
+
+    bool usermode = (tc->readMiscReg(AlphaISA::IPR_DTB_CM) & 0x18) != 0;
+
+    Addr pc = tc->readNextPC();
+    bool kernel = tc->getSystemPtr()->kernelStart <= pc &&
+        pc <= tc->getSystemPtr()->kernelEnd;
+
+    if (usermode) {
+        stack.push_back(user);
+        return;
+    }
+
+    if (!kernel) {
+        stack.push_back(console);
+        return;
+    }
+
+    SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab;
+    Addr ksp = tc->readIntReg(TheISA::StackPointerReg);
+    Addr bottom = ksp & ~0x3fff;
+    Addr addr;
+
+    if (is_call) {
+        if (!symtab->findNearestAddr(pc, addr))
+            panic("could not find address %#x", pc);
+
+        stack.push_back(addr);
+        pc = tc->readPC();
+    }
+
+    Addr ra;
+    int size;
+
+    while (ksp > bottom) {
+        if (!symtab->findNearestAddr(pc, addr))
+            panic("could not find symbol for pc=%#x", pc);
+        assert(pc >= addr && "symbol botch: callpc < func");
+
+        stack.push_back(addr);
+
+        if (isEntry(addr))
+            return;
+
+        if (decodePrologue(ksp, pc, addr, size, ra)) {
+            if (!ra)
+                return;
+
+            if (size <= 0) {
+                stack.push_back(unknown);
+                return;
+            }
+
+            pc = ra;
+            ksp += size;
+        } else {
+            stack.push_back(unknown);
+            return;
+        }
+
+        bool kernel = tc->getSystemPtr()->kernelStart <= pc &&
+            pc <= tc->getSystemPtr()->kernelEnd;
+        if (!kernel)
+            return;
+
+        if (stack.size() >= 1000)
+            panic("unwinding too far");
+    }
+
+    panic("unwinding too far");
+#endif
+}
+
+bool
+StackTrace::isEntry(Addr addr)
+{
+#if 0
+    if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp12))
+        return true;
+
+    if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp7))
+        return true;
+
+    if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp11))
+        return true;
+
+    if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp21))
+        return true;
+
+    if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp9))
+        return true;
+
+    if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp2))
+        return true;
+#endif
+    return false;
+}
+
+bool
+StackTrace::decodeStack(MachInst inst, int &disp)
+{
+    // lda $sp, -disp($sp)
+    //
+    // Opcode<31:26> == 0x08
+    // RA<25:21> == 30
+    // RB<20:16> == 30
+    // Disp<15:0>
+    const MachInst mem_mask = 0xffff0000;
+    const MachInst lda_pattern = 0x23de0000;
+    const MachInst lda_disp_mask = 0x0000ffff;
+
+    // subq $sp, disp, $sp
+    // addq $sp, disp, $sp
+    //
+    // Opcode<31:26> == 0x10
+    // RA<25:21> == 30
+    // Lit<20:13>
+    // One<12> = 1
+    // Func<11:5> == 0x20 (addq)
+    // Func<11:5> == 0x29 (subq)
+    // RC<4:0> == 30
+    const MachInst intop_mask = 0xffe01fff;
+    const MachInst addq_pattern = 0x43c0141e;
+    const MachInst subq_pattern = 0x43c0153e;
+    const MachInst intop_disp_mask = 0x001fe000;
+    const int intop_disp_shift = 13;
+
+    if ((inst & mem_mask) == lda_pattern)
+        disp = -sext<16>(inst & lda_disp_mask);
+    else if ((inst & intop_mask) == addq_pattern)
+        disp = -int((inst & intop_disp_mask) >> intop_disp_shift);
+    else if ((inst & intop_mask) == subq_pattern)
+        disp = int((inst & intop_disp_mask) >> intop_disp_shift);
+    else
+        return false;
+
+    return true;
+}
+
+bool
+StackTrace::decodeSave(MachInst inst, int &reg, int &disp)
+{
+    // lda $stq, disp($sp)
+    //
+    // Opcode<31:26> == 0x08
+    // RA<25:21> == ?
+    // RB<20:16> == 30
+    // Disp<15:0>
+    const MachInst stq_mask = 0xfc1f0000;
+    const MachInst stq_pattern = 0xb41e0000;
+    const MachInst stq_disp_mask = 0x0000ffff;
+    const MachInst reg_mask = 0x03e00000;
+    const int reg_shift = 21;
+
+    if ((inst & stq_mask) == stq_pattern) {
+        reg = (inst & reg_mask) >> reg_shift;
+        disp = sext<16>(inst & stq_disp_mask);
+    } else {
+        return false;
+    }
+
+    return true;
+}
+
+/*
+ * Decode the function prologue for the function we're in, and note
+ * which registers are stored where, and how large the stack frame is.
+ */
+bool
+StackTrace::decodePrologue(Addr sp, Addr callpc, Addr func,
+                           int &size, Addr &ra)
+{
+    size = 0;
+    ra = 0;
+
+    for (Addr pc = func; pc < callpc; pc += sizeof(MachInst)) {
+        MachInst inst;
+        CopyOut(tc, (uint8_t *)&inst, pc, sizeof(MachInst));
+
+        int reg, disp;
+        if (decodeStack(inst, disp)) {
+            if (size) {
+                // panic("decoding frame size again");
+                return true;
+            }
+            size += disp;
+        } else if (decodeSave(inst, reg, disp)) {
+            if (!ra && reg == ReturnAddressReg) {
+                CopyOut(tc, (uint8_t *)&ra, sp + disp, sizeof(Addr));
+                if (!ra) {
+                    // panic("no return address value pc=%#x\n", pc);
+                    return false;
+                }
+            }
+        }
+    }
+
+    return true;
+}
+
+#if TRACING_ON
+void
+StackTrace::dump()
+{
+    StringWrap name(tc->getCpuPtr()->name());
+    SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab;
+
+    DPRINTFN("------ Stack ------\n");
+
+    string symbol;
+    for (int i = 0, size = stack.size(); i < size; ++i) {
+        Addr addr = stack[size - i - 1];
+        if (addr == user)
+            symbol = "user";
+        else if (addr == console)
+            symbol = "console";
+        else if (addr == unknown)
+            symbol = "unknown";
+        else
+            symtab->findSymbol(addr, symbol);
+
+        DPRINTFN("%#x: %s\n", addr, symbol);
+    }
+}
+#endif