X86: Get X86_FS to compile.

--HG--
extra : convert_revision : fb973bcf13648876d5691231845dd47a2be50f01

1 files changed, 227 insertions, 0 deletions

diff --git a/src/arch/x86/stacktrace.cc b/src/arch/x86/stacktrace.cc
new file mode 100644
index 000000000..bf7059dea
--- /dev/null
+++ b/src/arch/x86/stacktrace.cc
@@ -0,0 +1,227 @@
+/*
+ * 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/x86/isa_traits.hh"
+#include "arch/x86/stacktrace.hh"
+#include "arch/x86/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;
+namespace X86ISA
+{
+    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)
+    {
+    }
+
+    bool
+    StackTrace::isEntry(Addr addr)
+    {
+        return false;
+    }
+
+    bool
+    StackTrace::decodeStack(MachInst inst, int &disp)
+    {
+        return true;
+    }
+
+    bool
+    StackTrace::decodeSave(MachInst inst, int &reg, int &disp)
+    {
+        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
+}