#include <fcntl.h>
#include <unistd.h>
-#include <string>
+#include <cstdio>
#include <iostream>
+#include <string>
-#include "sim/syscall_emul.hh"
+#include "arch/utility.hh"
#include "base/chunk_generator.hh"
#include "base/trace.hh"
-#include "cpu/thread_context.hh"
+#include "config/the_isa.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/sim_exit.hh"
+#include "sim/syscall_emul.hh"
+#include "sim/system.hh"
using namespace std;
using namespace TheISA;
void
SyscallDesc::doSyscall(int callnum, LiveProcess *process, ThreadContext *tc)
{
- DPRINTFR(SyscallVerbose, "%d: %s: syscall %s called w/arguments %d,%d,%d,%d\n",
- curTick,tc->getCpuPtr()->name(), name,
- tc->getSyscallArg(0),tc->getSyscallArg(1),
- tc->getSyscallArg(2),tc->getSyscallArg(3));
+#if TRACING_ON
+ int index = 0;
+#endif
+ DPRINTFR(SyscallVerbose,
+ "%d: %s: syscall %s called w/arguments %d,%d,%d,%d\n",
+ curTick(), tc->getCpuPtr()->name(), name,
+ process->getSyscallArg(tc, index),
+ process->getSyscallArg(tc, index),
+ process->getSyscallArg(tc, index),
+ process->getSyscallArg(tc, index));
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))
- tc->setSyscallReturn(retval);
+ process->setSyscallReturn(tc, retval);
}
ignoreFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
ThreadContext *tc)
{
+ int index = 0;
warn("ignoring syscall %s(%d, %d, ...)", desc->name,
- tc->getSyscallArg(0), tc->getSyscallArg(1));
+ process->getSyscallArg(tc, index), process->getSyscallArg(tc, index));
+
+ return 0;
+}
+
+
+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;
}
exitFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
ThreadContext *tc)
{
- if (tc->exit()) {
- exitSimLoop("target called exit()", tc->getSyscallArg(0) & 0xff);
+ if (process->system->numRunningContexts() == 1) {
+ // Last running context... exit simulator
+ int index = 0;
+ exitSimLoop("target called exit()",
+ process->getSyscallArg(tc, index) & 0xff);
+ } else {
+ // other running threads... just halt this one
+ tc->halt();
}
return 1;
}
+SyscallReturn
+exitGroupFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
+ ThreadContext *tc)
+{
+ // really should just halt all thread contexts belonging to this
+ // process in case there's another process running...
+ int index = 0;
+ exitSimLoop("target called exit()",
+ process->getSyscallArg(tc, index) & 0xff);
+
+ return 1;
+}
+
+
SyscallReturn
getpagesizeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
{
SyscallReturn
-obreakFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
+brkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
{
- Addr junk;
-
// change brk addr to first arg
- Addr new_brk = tc->getSyscallArg(0);
- if (new_brk != 0) {
+ int index = 0;
+ Addr new_brk = p->getSyscallArg(tc, index);
+
+ // in Linux at least, brk(0) returns the current break value
+ // (note that the syscall and the glibc function have different behavior)
+ if (new_brk == 0)
+ return p->brk_point;
+
+ if (new_brk > p->brk_point) {
+ // might need to allocate some new pages
for (ChunkGenerator gen(p->brk_point, new_brk - p->brk_point,
VMPageSize); !gen.done(); gen.next()) {
- if (!p->pTable->translate(gen.addr(), junk))
- p->pTable->allocate(roundDown(gen.addr(), VMPageSize),
- VMPageSize);
+ if (!p->pTable->translate(gen.addr()))
+ p->allocateMem(roundDown(gen.addr(), VMPageSize), VMPageSize);
+
+ // if the address is already there, zero it out
+ else {
+ uint8_t zero = 0;
+ SETranslatingPortProxy *tp = tc->getMemProxy();
+
+ // split non-page aligned accesses
+ Addr next_page = roundUp(gen.addr(), VMPageSize);
+ uint32_t size_needed = next_page - gen.addr();
+ tp->memsetBlob(gen.addr(), zero, size_needed);
+ if (gen.addr() + VMPageSize > next_page &&
+ next_page < new_brk &&
+ p->pTable->translate(next_page))
+ {
+ size_needed = VMPageSize - size_needed;
+ tp->memsetBlob(next_page, zero, size_needed);
+ }
+ }
}
- p->brk_point = new_brk;
}
+
+ p->brk_point = new_brk;
DPRINTF(SyscallVerbose, "Break Point changed to: %#X\n", p->brk_point);
return p->brk_point;
}
SyscallReturn
closeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
{
- int target_fd = tc->getSyscallArg(0);
- int status = close(p->sim_fd(target_fd));
+ int index = 0;
+ int target_fd = p->getSyscallArg(tc, index);
+ 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;
SyscallReturn
readFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
{
- int fd = p->sim_fd(tc->getSyscallArg(0));
- int nbytes = tc->getSyscallArg(2);
- BufferArg bufArg(tc->getSyscallArg(1), nbytes);
+ int index = 0;
+ int fd = p->sim_fd(p->getSyscallArg(tc, index));
+ Addr bufPtr = p->getSyscallArg(tc, index);
+ int nbytes = p->getSyscallArg(tc, index);
+ BufferArg bufArg(bufPtr, nbytes);
int bytes_read = read(fd, bufArg.bufferPtr(), nbytes);
if (bytes_read != -1)
- bufArg.copyOut(tc->getMemPort());
+ bufArg.copyOut(tc->getMemProxy());
return bytes_read;
}
SyscallReturn
writeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
{
- int fd = p->sim_fd(tc->getSyscallArg(0));
- int nbytes = tc->getSyscallArg(2);
- BufferArg bufArg(tc->getSyscallArg(1), nbytes);
+ int index = 0;
+ int fd = p->sim_fd(p->getSyscallArg(tc, index));
+ Addr bufPtr = p->getSyscallArg(tc, index);
+ 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);
SyscallReturn
lseekFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
{
- int fd = p->sim_fd(tc->getSyscallArg(0));
- uint64_t offs = tc->getSyscallArg(1);
- int whence = tc->getSyscallArg(2);
+ int index = 0;
+ int fd = p->sim_fd(p->getSyscallArg(tc, index));
+ uint64_t offs = p->getSyscallArg(tc, index);
+ int whence = p->getSyscallArg(tc, index);
off_t result = lseek(fd, offs, whence);
SyscallReturn
_llseekFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
{
- int fd = p->sim_fd(tc->getSyscallArg(0));
- uint64_t offset_high = tc->getSyscallArg(1);
- uint32_t offset_low = tc->getSyscallArg(2);
- Addr result_ptr = tc->getSyscallArg(3);
- int whence = tc->getSyscallArg(4);
+ int index = 0;
+ int fd = p->sim_fd(p->getSyscallArg(tc, index));
+ uint64_t offset_high = p->getSyscallArg(tc, index);
+ uint32_t offset_low = p->getSyscallArg(tc, index);
+ Addr result_ptr = p->getSyscallArg(tc, index);
+ int whence = p->getSyscallArg(tc, index);
uint64_t offset = (offset_high << 32) | offset_low;
//The seek failed.
return -errno;
} else {
- //The seek succeeded.
- //Copy "result" to "result_ptr"
- //XXX We'll assume that the size of loff_t is 64 bits on the
- //target platform
+ // The seek succeeded.
+ // Copy "result" to "result_ptr"
+ // XXX We'll assume that the size of loff_t is 64 bits on the
+ // 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;
}
SyscallReturn
gethostnameFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
{
- int name_len = tc->getSyscallArg(1);
- BufferArg name(tc->getSyscallArg(0), name_len);
+ int index = 0;
+ Addr bufPtr = p->getSyscallArg(tc, index);
+ int name_len = p->getSyscallArg(tc, index);
+ BufferArg name(bufPtr, name_len);
strncpy((char *)name.bufferPtr(), hostname, name_len);
- name.copyOut(tc->getMemPort());
+ name.copyOut(tc->getMemProxy());
return 0;
}
getcwdFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
{
int result = 0;
- unsigned long size = tc->getSyscallArg(1);
- BufferArg buf(tc->getSyscallArg(0), size);
+ int index = 0;
+ Addr bufPtr = p->getSyscallArg(tc, index);
+ unsigned long size = p->getSyscallArg(tc, index);
+ BufferArg buf(bufPtr, size);
// Is current working directory defined?
string cwd = p->getcwd();
}
}
- buf.copyOut(tc->getMemPort());
+ buf.copyOut(tc->getMemProxy());
return (result == -1) ? -errno : result;
}
{
string path;
- if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+ int index = 0;
+ if (!tc->getMemProxy()->tryReadString(path, p->getSyscallArg(tc, index)))
return (TheISA::IntReg)-EFAULT;
// Adjust path for current working directory
path = p->fullPath(path);
- size_t bufsiz = tc->getSyscallArg(2);
- BufferArg buf(tc->getSyscallArg(1), bufsiz);
+ Addr bufPtr = p->getSyscallArg(tc, index);
+ size_t bufsiz = p->getSyscallArg(tc, index);
+
+ BufferArg buf(bufPtr, bufsiz);
int result = readlink(path.c_str(), (char *)buf.bufferPtr(), bufsiz);
- buf.copyOut(tc->getMemPort());
+ buf.copyOut(tc->getMemProxy());
return (result == -1) ? -errno : result;
}
{
string path;
- if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+ int index = 0;
+ if (!tc->getMemProxy()->tryReadString(path, p->getSyscallArg(tc, index)))
return (TheISA::IntReg)-EFAULT;
// Adjust path for current working directory
{
string path;
- if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+ int index = 0;
+ if (!tc->getMemProxy()->tryReadString(path, p->getSyscallArg(tc, index)))
return (TheISA::IntReg)-EFAULT;
// Adjust path for current working directory
path = p->fullPath(path);
- mode_t mode = tc->getSyscallArg(1);
+ mode_t mode = p->getSyscallArg(tc, index);
int result = mkdir(path.c_str(), mode);
return (result == -1) ? -errno : result;
{
string old_name;
- if (!tc->getMemPort()->tryReadString(old_name, tc->getSyscallArg(0)))
+ int index = 0;
+ if (!tc->getMemProxy()->tryReadString(old_name, p->getSyscallArg(tc, index)))
return -EFAULT;
string new_name;
- if (!tc->getMemPort()->tryReadString(new_name, tc->getSyscallArg(1)))
+ if (!tc->getMemProxy()->tryReadString(new_name, p->getSyscallArg(tc, index)))
return -EFAULT;
// Adjust path for current working directory
{
string path;
- if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+ int index = 0;
+ if (!tc->getMemProxy()->tryReadString(path, p->getSyscallArg(tc, index)))
return -EFAULT;
- off_t length = tc->getSyscallArg(1);
+ off_t length = p->getSyscallArg(tc, index);
// Adjust path for current working directory
path = p->fullPath(path);
}
SyscallReturn
-ftruncateFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc)
+ftruncateFunc(SyscallDesc *desc, int num,
+ LiveProcess *process, ThreadContext *tc)
+{
+ int index = 0;
+ int fd = process->sim_fd(process->getSyscallArg(tc, index));
+
+ if (fd < 0)
+ return -EBADF;
+
+ off_t length = process->getSyscallArg(tc, index);
+
+ int result = ftruncate(fd, length);
+ return (result == -1) ? -errno : result;
+}
+
+SyscallReturn
+truncate64Func(SyscallDesc *desc, int num,
+ LiveProcess *process, ThreadContext *tc)
+{
+ int index = 0;
+ string path;
+
+ if (!tc->getMemProxy()->tryReadString(path, process->getSyscallArg(tc, index)))
+ return -EFAULT;
+
+ 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;
+}
+
+SyscallReturn
+ftruncate64Func(SyscallDesc *desc, int num,
+ LiveProcess *process, ThreadContext *tc)
{
- int fd = process->sim_fd(tc->getSyscallArg(0));
+ int index = 0;
+ int fd = process->sim_fd(process->getSyscallArg(tc, index));
if (fd < 0)
return -EBADF;
- off_t length = tc->getSyscallArg(1);
+ 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;
}
// changing anything.
mode_t oldMask = umask(0);
umask(oldMask);
- return oldMask;
+ return (int)oldMask;
}
SyscallReturn
{
string path;
- if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+ int index = 0;
+ if (!tc->getMemProxy()->tryReadString(path, p->getSyscallArg(tc, index)))
return -EFAULT;
/* XXX endianess */
- uint32_t owner = tc->getSyscallArg(1);
+ uint32_t owner = p->getSyscallArg(tc, index);
uid_t hostOwner = owner;
- uint32_t group = tc->getSyscallArg(2);
+ uint32_t group = p->getSyscallArg(tc, index);
gid_t hostGroup = group;
// Adjust path for current working directory
SyscallReturn
fchownFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc)
{
- int fd = process->sim_fd(tc->getSyscallArg(0));
+ int index = 0;
+ int fd = process->sim_fd(process->getSyscallArg(tc, index));
if (fd < 0)
return -EBADF;
/* XXX endianess */
- uint32_t owner = tc->getSyscallArg(1);
+ uint32_t owner = process->getSyscallArg(tc, index);
uid_t hostOwner = owner;
- uint32_t group = tc->getSyscallArg(2);
+ uint32_t group = process->getSyscallArg(tc, index);
gid_t hostGroup = group;
int result = fchown(fd, hostOwner, hostGroup);
SyscallReturn
dupFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc)
{
- int fd = process->sim_fd(tc->getSyscallArg(0));
+ int index = 0;
+ int fd = process->sim_fd(process->getSyscallArg(tc, index));
if (fd < 0)
return -EBADF;
- Process::FdMap *fdo = process->sim_fd_obj(tc->getSyscallArg(0));
+ Process::FdMap *fdo = process->sim_fd_obj(fd);
int result = dup(fd);
- return (result == -1) ? -errno : process->alloc_fd(result, fdo->filename, fdo->flags, fdo->mode, false);
+ return (result == -1) ? -errno :
+ process->alloc_fd(result, fdo->filename, fdo->flags, fdo->mode, false);
}
fcntlFunc(SyscallDesc *desc, int num, LiveProcess *process,
ThreadContext *tc)
{
- int fd = tc->getSyscallArg(0);
+ int index = 0;
+ int fd = process->getSyscallArg(tc, index);
if (fd < 0 || process->sim_fd(fd) < 0)
return -EBADF;
- int cmd = tc->getSyscallArg(1);
+ int cmd = process->getSyscallArg(tc, index);
switch (cmd) {
case 0: // F_DUPFD
// if we really wanted to support this, we'd need to do it
fcntl64Func(SyscallDesc *desc, int num, LiveProcess *process,
ThreadContext *tc)
{
- int fd = tc->getSyscallArg(0);
+ int index = 0;
+ int fd = process->getSyscallArg(tc, index);
if (fd < 0 || process->sim_fd(fd) < 0)
return -EBADF;
- int cmd = tc->getSyscallArg(1);
+ int cmd = process->getSyscallArg(tc, index);
switch (cmd) {
case 33: //F_GETLK64
warn("fcntl64(%d, F_GETLK64) not supported, error returned\n", fd);
// EUID goes in r20.
tc->setIntReg(SyscallPseudoReturnReg, process->euid()); //EUID
- return process->uid(); // UID
+ return process->uid(); // UID
}
ThreadContext *tc)
{
// can't fathom why a benchmark would call this.
- warn("Ignoring call to setuid(%d)\n", tc->getSyscallArg(0));
+ int index = 0;
+ warn("Ignoring call to setuid(%d)\n", process->getSyscallArg(tc, index));
return 0;
}
getuidFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
ThreadContext *tc)
{
- return process->uid(); // UID
+ return process->uid(); // UID
}
SyscallReturn
geteuidFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
ThreadContext *tc)
{
- return process->euid(); // UID
+ return process->euid(); // UID
}
SyscallReturn
}
+SyscallReturn
+cloneFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
+ ThreadContext *tc)
+{
+ int index = 0;
+ IntReg flags = process->getSyscallArg(tc, index);
+ IntReg newStack = process->getSyscallArg(tc, index);
+
+ DPRINTF(SyscallVerbose, "In sys_clone:\n");
+ DPRINTF(SyscallVerbose, " Flags=%llx\n", flags);
+ DPRINTF(SyscallVerbose, " Child stack=%llx\n", newStack);
+
+
+ if (flags != 0x10f00) {
+ warn("This sys_clone implementation assumes flags "
+ "CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD "
+ "(0x10f00), and may not work correctly with given flags "
+ "0x%llx\n", flags);
+ }
+
+ ThreadContext* ctc; // child thread context
+ if ( ( ctc = process->findFreeContext() ) != NULL ) {
+ DPRINTF(SyscallVerbose, " Found unallocated thread context\n");
+
+ ctc->clearArchRegs();
+
+ // Arch-specific cloning code
+ #if THE_ISA == ALPHA_ISA or THE_ISA == X86_ISA
+ // Cloning the misc. regs for these archs is enough
+ TheISA::copyMiscRegs(tc, ctc);
+ #elif THE_ISA == SPARC_ISA
+ TheISA::copyRegs(tc, ctc);
+
+ // TODO: Explain what this code actually does :-)
+ ctc->setIntReg(NumIntArchRegs + 6, 0);
+ ctc->setIntReg(NumIntArchRegs + 4, 0);
+ ctc->setIntReg(NumIntArchRegs + 3, NWindows - 2);
+ ctc->setIntReg(NumIntArchRegs + 5, NWindows);
+ ctc->setMiscReg(MISCREG_CWP, 0);
+ ctc->setIntReg(NumIntArchRegs + 7, 0);
+ ctc->setMiscRegNoEffect(MISCREG_TL, 0);
+ ctc->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY);
+
+ 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
+
+ // Set up stack register
+ ctc->setIntReg(TheISA::StackPointerReg, newStack);
+
+ // Set up syscall return values in parent and child
+ ctc->setIntReg(ReturnValueReg, 0); // return value, child
+
+ // Alpha needs SyscallSuccessReg=0 in child
+ #if THE_ISA == ALPHA_ISA
+ ctc->setIntReg(TheISA::SyscallSuccessReg, 0);
+ #endif
+
+ // In SPARC/Linux, clone returns 0 on pseudo-return register if
+ // parent, non-zero if child
+ #if THE_ISA == SPARC_ISA
+ tc->setIntReg(TheISA::SyscallPseudoReturnReg, 0);
+ ctc->setIntReg(TheISA::SyscallPseudoReturnReg, 1);
+ #endif
+
+ ctc->pcState(tc->nextInstAddr());
+
+ ctc->activate();
+
+ // Should return nonzero child TID in parent's syscall return register,
+ // but for our pthread library any non-zero value will work
+ return 1;
+ } else {
+ fatal("Called sys_clone, but no unallocated thread contexts found!\n");
+ return 0;
+ }
+}
+
projects / gem5.git / blobdiff