util: implements "writefile" gem5 op to export file from guest to host filesystem

[gem5.git] / src / sim / syscall_emul.cc

diff --git a/src/sim/syscall_emul.cc b/src/sim/syscall_emul.cc
index 7cffffcf1c3b6fcf7649036d5276d15ed6dcae8a..dc8a9a5c884a9830cd26cb203c6643e62b7412a5 100644 (file)
--- a/src/sim/syscall_emul.cc
+++ b/src/sim/syscall_emul.cc
@@ -36,16 +36,18 @@
 #include <iostream>
 #include <string>
 
-#include "sim/syscall_emul.hh"
+#include "arch/utility.hh"
 #include "base/chunk_generator.hh"
 #include "base/trace.hh"
 #include "config/the_isa.hh"
-#include "cpu/thread_context.hh"
 #include "cpu/base.hh"
+#include "cpu/thread_context.hh"
+#include "debug/SyscallVerbose.hh"
 #include "mem/page_table.hh"
 #include "sim/process.hh"
-#include "sim/system.hh"
 #include "sim/sim_exit.hh"
+#include "sim/syscall_emul.hh"
+#include "sim/system.hh"
 
 using namespace std;
 using namespace TheISA;
@@ -58,7 +60,7 @@ SyscallDesc::doSyscall(int callnum, LiveProcess *process, ThreadContext *tc)
 #endif
     DPRINTFR(SyscallVerbose,
              "%d: %s: syscall %s called w/arguments %d,%d,%d,%d\n",
-             curTick, tc->getCpuPtr()->name(), name,
+             curTick(), tc->getCpuPtr()->name(), name,
              process->getSyscallArg(tc, index),
              process->getSyscallArg(tc, index),
              process->getSyscallArg(tc, index),
@@ -67,7 +69,7 @@ SyscallDesc::doSyscall(int callnum, LiveProcess *process, ThreadContext *tc)
     SyscallReturn retval = (*funcPtr)(this, callnum, process, tc);
 
     DPRINTFR(SyscallVerbose, "%d: %s: syscall %s returns %d\n",
-             curTick,tc->getCpuPtr()->name(), name, retval.value());
+             curTick(),tc->getCpuPtr()->name(), name, retval.value());
 
     if (!(flags & SyscallDesc::SuppressReturnValue))
         process->setSyscallReturn(tc, retval);
@@ -96,6 +98,18 @@ ignoreFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
 }
 
 
+SyscallReturn
+ignoreWarnOnceFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
+           ThreadContext *tc)
+{
+    int index = 0;
+    warn_once("ignoring syscall %s(%d, %d, ...)", desc->name,
+         process->getSyscallArg(tc, index), process->getSyscallArg(tc, index));
+
+    return 0;
+}
+
+
 SyscallReturn
 exitFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
          ThreadContext *tc)
@@ -152,13 +166,12 @@ brkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
         for (ChunkGenerator gen(p->brk_point, new_brk - p->brk_point,
                                 VMPageSize); !gen.done(); gen.next()) {
             if (!p->pTable->translate(gen.addr()))
-                p->pTable->allocate(roundDown(gen.addr(), VMPageSize),
-                                    VMPageSize);
+                p->allocateMem(roundDown(gen.addr(), VMPageSize), VMPageSize);
 
             // if the address is already there, zero it out
             else {
                 uint8_t zero  = 0;
-                TranslatingPort *tp = tc->getMemPort();
+                SETranslatingPortProxy *tp = tc->getMemProxy();
 
                 // split non-page aligned accesses
                 Addr next_page = roundUp(gen.addr(), VMPageSize);
@@ -186,7 +199,10 @@ closeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
     int index = 0;
     int target_fd = p->getSyscallArg(tc, index);
-    int status = close(p->sim_fd(target_fd));
+    int sim_fd = p->sim_fd(target_fd);
+    int status = 0;
+    if (sim_fd > 2)
+        status = close(sim_fd);
     if (status >= 0)
         p->free_fd(target_fd);
     return status;
@@ -205,7 +221,7 @@ readFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
     int bytes_read = read(fd, bufArg.bufferPtr(), nbytes);
 
     if (bytes_read != -1)
-        bufArg.copyOut(tc->getMemPort());
+        bufArg.copyOut(tc->getMemProxy());
 
     return bytes_read;
 }
@@ -219,7 +235,7 @@ writeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
     int nbytes = p->getSyscallArg(tc, index);
     BufferArg bufArg(bufPtr, nbytes);
 
-    bufArg.copyIn(tc->getMemPort());
+    bufArg.copyIn(tc->getMemProxy());
 
     int bytes_written = write(fd, bufArg.bufferPtr(), nbytes);
 
@@ -268,7 +284,7 @@ _llseekFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
         // target platform
         BufferArg result_buf(result_ptr, sizeof(result));
         memcpy(result_buf.bufferPtr(), &result, sizeof(result));
-        result_buf.copyOut(tc->getMemPort());
+        result_buf.copyOut(tc->getMemProxy());
         return 0;
     }
 
@@ -297,7 +313,7 @@ gethostnameFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 
     strncpy((char *)name.bufferPtr(), hostname, name_len);
 
-    name.copyOut(tc->getMemPort());
+    name.copyOut(tc->getMemProxy());
 
     return 0;
 }
@@ -306,7 +322,7 @@ SyscallReturn
 getcwdFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
     int result = 0;
-    int index;
+    int index = 0;
     Addr bufPtr = p->getSyscallArg(tc, index);
     unsigned long size = p->getSyscallArg(tc, index);
     BufferArg buf(bufPtr, size);
@@ -330,7 +346,7 @@ getcwdFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
         }
     }
 
-    buf.copyOut(tc->getMemPort());
+    buf.copyOut(tc->getMemProxy());
 
     return (result == -1) ? -errno : result;
 }
@@ -342,7 +358,7 @@ readlinkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
     string path;
 
     int index = 0;
-    if (!tc->getMemPort()->tryReadString(path, p->getSyscallArg(tc, index)))
+    if (!tc->getMemProxy()->tryReadString(path, p->getSyscallArg(tc, index)))
         return (TheISA::IntReg)-EFAULT;
 
     // Adjust path for current working directory
@@ -355,7 +371,7 @@ readlinkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 
     int result = readlink(path.c_str(), (char *)buf.bufferPtr(), bufsiz);
 
-    buf.copyOut(tc->getMemPort());
+    buf.copyOut(tc->getMemProxy());
 
     return (result == -1) ? -errno : result;
 }
@@ -366,7 +382,7 @@ unlinkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
     string path;
 
     int index = 0;
-    if (!tc->getMemPort()->tryReadString(path, p->getSyscallArg(tc, index)))
+    if (!tc->getMemProxy()->tryReadString(path, p->getSyscallArg(tc, index)))
         return (TheISA::IntReg)-EFAULT;
 
     // Adjust path for current working directory
@@ -383,7 +399,7 @@ mkdirFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
     string path;
 
     int index = 0;
-    if (!tc->getMemPort()->tryReadString(path, p->getSyscallArg(tc, index)))
+    if (!tc->getMemProxy()->tryReadString(path, p->getSyscallArg(tc, index)))
         return (TheISA::IntReg)-EFAULT;
 
     // Adjust path for current working directory
@@ -401,12 +417,12 @@ renameFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
     string old_name;
 
     int index = 0;
-    if (!tc->getMemPort()->tryReadString(old_name, p->getSyscallArg(tc, index)))
+    if (!tc->getMemProxy()->tryReadString(old_name, p->getSyscallArg(tc, index)))
         return -EFAULT;
 
     string new_name;
 
-    if (!tc->getMemPort()->tryReadString(new_name, p->getSyscallArg(tc, index)))
+    if (!tc->getMemProxy()->tryReadString(new_name, p->getSyscallArg(tc, index)))
         return -EFAULT;
 
     // Adjust path for current working directory
@@ -423,7 +439,7 @@ truncateFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
     string path;
 
     int index = 0;
-    if (!tc->getMemPort()->tryReadString(path, p->getSyscallArg(tc, index)))
+    if (!tc->getMemProxy()->tryReadString(path, p->getSyscallArg(tc, index)))
         return -EFAULT;
 
     off_t length = p->getSyscallArg(tc, index);
@@ -458,15 +474,19 @@ truncate64Func(SyscallDesc *desc, int num,
     int index = 0;
     string path;
 
-    if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, index)))
+    if (!tc->getMemProxy()->tryReadString(path, process->getSyscallArg(tc, index)))
        return -EFAULT;
 
-    loff_t length = process->getSyscallArg(tc, index, 64);
+    int64_t length = process->getSyscallArg(tc, index, 64);
 
     // Adjust path for current working directory
     path = process->fullPath(path);
 
+#if NO_STAT64
+    int result = truncate(path.c_str(), length);
+#else
     int result = truncate64(path.c_str(), length);
+#endif
     return (result == -1) ? -errno : result;
 }
 
@@ -480,9 +500,13 @@ ftruncate64Func(SyscallDesc *desc, int num,
     if (fd < 0)
         return -EBADF;
 
-    loff_t length = process->getSyscallArg(tc, index, 64);
+    int64_t length = process->getSyscallArg(tc, index, 64);
 
+#if NO_STAT64
+    int result = ftruncate(fd, length);
+#else
     int result = ftruncate64(fd, length);
+#endif
     return (result == -1) ? -errno : result;
 }
 
@@ -503,7 +527,7 @@ chownFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
     string path;
 
     int index = 0;
-    if (!tc->getMemPort()->tryReadString(path, p->getSyscallArg(tc, index)))
+    if (!tc->getMemProxy()->tryReadString(path, p->getSyscallArg(tc, index)))
         return -EFAULT;
 
     /* XXX endianess */
@@ -790,6 +814,8 @@ cloneFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
 
             for (int y = 8; y < 32; y++)
                 ctc->setIntReg(y, tc->readIntReg(y));
+        #elif THE_ISA == ARM_ISA
+            TheISA::copyRegs(tc, ctc);
         #else
             fatal("sys_clone is not implemented for this ISA\n");
         #endif
@@ -812,9 +838,7 @@ cloneFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
             ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1);
         #endif
 
-        ctc->setPC(tc->readNextPC());
-        ctc->setNextPC(tc->readNextPC() + sizeof(TheISA::MachInst));
-        ctc->setNextNPC(tc->readNextNPC() + sizeof(TheISA::MachInst));
+        ctc->pcState(tc->nextInstAddr());
 
         ctc->activate();