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Diffstat (limited to 'sim/syscall_emul.cc')
-rw-r--r--sim/syscall_emul.cc177
1 files changed, 169 insertions, 8 deletions
diff --git a/sim/syscall_emul.cc b/sim/syscall_emul.cc
index 0cebee0e1..1d0b3a375 100644
--- a/sim/syscall_emul.cc
+++ b/sim/syscall_emul.cc
@@ -26,6 +26,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+#include <fcntl.h>
#include <unistd.h>
#include <string>
@@ -40,17 +41,18 @@
#include "sim/sim_events.hh"
using namespace std;
+using namespace TheISA;
void
SyscallDesc::doSyscall(int callnum, Process *process, ExecContext *xc)
{
DPRINTFR(SyscallVerbose, "%s: syscall %s called\n",
- xc->cpu->name(), name);
+ xc->getCpuPtr()->name(), name);
SyscallReturn retval = (*funcPtr)(this, callnum, process, xc);
DPRINTFR(SyscallVerbose, "%s: syscall %s returns %d\n",
- xc->cpu->name(), name, retval.value());
+ xc->getCpuPtr()->name(), name, retval.value());
if (!(flags & SyscallDesc::SuppressReturnValue))
xc->setSyscallReturn(retval);
@@ -89,7 +91,7 @@ exitFunc(SyscallDesc *desc, int callnum, Process *process,
SyscallReturn
getpagesizeFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
{
- return VMPageSize;
+ return (int)VMPageSize;
}
@@ -191,7 +193,7 @@ unlinkFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
{
string path;
- if (xc->port->readStringFunctional(path, xc->getSyscallArg(0)) != No_Fault)
+ if (xc->port->readStringFunctional(path, xc->getSyscallArg(0)) != NoFault)
return (TheISA::IntReg)-EFAULT;
int result = unlink(path.c_str());
@@ -203,12 +205,12 @@ renameFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
{
string old_name;
- if (xc->port->readStringFunctional(old_name, xc->getSyscallArg(0)) != No_Fault)
+ if (xc->port->readStringFunctional(old_name, xc->getSyscallArg(0)) != NoFault)
return -EFAULT;
string new_name;
- if (xc->port->readStringFunctional(new_name, xc->getSyscallArg(1)) != No_Fault)
+ if (xc->port->readStringFunctional(new_name, xc->getSyscallArg(1)) != NoFault)
return -EFAULT;
int64_t result = rename(old_name.c_str(), new_name.c_str());
@@ -220,7 +222,7 @@ truncateFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
{
string path;
- if (xc->port->readStringFunctional(path, xc->getSyscallArg(0)) != No_Fault)
+ if (xc->port->readStringFunctional(path, xc->getSyscallArg(0)) != NoFault)
return -EFAULT;
off_t length = xc->getSyscallArg(1);
@@ -248,7 +250,7 @@ chownFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
{
string path;
- if (xc->port->readStringFunctional(path, xc->getSyscallArg(0)) != No_Fault)
+ if (xc->port->readStringFunctional(path, xc->getSyscallArg(0)) != NoFault)
return -EFAULT;
/* XXX endianess */
@@ -278,3 +280,162 @@ fchownFunc(SyscallDesc *desc, int num, Process *process, ExecContext *xc)
int result = fchown(fd, hostOwner, hostGroup);
return (result == -1) ? -errno : result;
}
+
+
+SyscallReturn
+fcntlFunc(SyscallDesc *desc, int num, Process *process,
+ ExecContext *xc)
+{
+ int fd = xc->getSyscallArg(0);
+
+ if (fd < 0 || process->sim_fd(fd) < 0)
+ return -EBADF;
+
+ int cmd = xc->getSyscallArg(1);
+ switch (cmd) {
+ case 0: // F_DUPFD
+ // if we really wanted to support this, we'd need to do it
+ // in the target fd space.
+ warn("fcntl(%d, F_DUPFD) not supported, error returned\n", fd);
+ return -EMFILE;
+
+ case 1: // F_GETFD (get close-on-exec flag)
+ case 2: // F_SETFD (set close-on-exec flag)
+ return 0;
+
+ case 3: // F_GETFL (get file flags)
+ case 4: // F_SETFL (set file flags)
+ // not sure if this is totally valid, but we'll pass it through
+ // to the underlying OS
+ warn("fcntl(%d, %d) passed through to host\n", fd, cmd);
+ return fcntl(process->sim_fd(fd), cmd);
+ // return 0;
+
+ case 7: // F_GETLK (get lock)
+ case 8: // F_SETLK (set lock)
+ case 9: // F_SETLKW (set lock and wait)
+ // don't mess with file locking... just act like it's OK
+ warn("File lock call (fcntl(%d, %d)) ignored.\n", fd, cmd);
+ return 0;
+
+ default:
+ warn("Unknown fcntl command %d\n", cmd);
+ return 0;
+ }
+}
+
+SyscallReturn
+pipePseudoFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ int fds[2], sim_fds[2];
+ int pipe_retval = pipe(fds);
+
+ if (pipe_retval < 0) {
+ // error
+ return pipe_retval;
+ }
+
+ sim_fds[0] = process->alloc_fd(fds[0]);
+ sim_fds[1] = process->alloc_fd(fds[1]);
+
+ // Alpha Linux convention for pipe() is that fd[0] is returned as
+ // the return value of the function, and fd[1] is returned in r20.
+ xc->setIntReg(SyscallPseudoReturnReg, sim_fds[1]);
+ return sim_fds[0];
+}
+
+
+SyscallReturn
+getpidPseudoFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ // Make up a PID. There's no interprocess communication in
+ // fake_syscall mode, so there's no way for a process to know it's
+ // not getting a unique value.
+
+ xc->setIntReg(SyscallPseudoReturnReg, 99);
+ return 100;
+}
+
+
+SyscallReturn
+getuidPseudoFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ // Make up a UID and EUID... it shouldn't matter, and we want the
+ // simulation to be deterministic.
+
+ // EUID goes in r20.
+ xc->setIntReg(SyscallPseudoReturnReg, 100); //EUID
+ return 100; // UID
+}
+
+
+SyscallReturn
+getgidPseudoFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ // Get current group ID. EGID goes in r20.
+ xc->setIntReg(SyscallPseudoReturnReg, 100); //EGID
+ return 100;
+}
+
+
+SyscallReturn
+setuidFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ // can't fathom why a benchmark would call this.
+ warn("Ignoring call to setuid(%d)\n", xc->getSyscallArg(0));
+ return 0;
+}
+
+SyscallReturn
+getpidFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ // Make up a PID. There's no interprocess communication in
+ // fake_syscall mode, so there's no way for a process to know it's
+ // not getting a unique value.
+
+ xc->setIntReg(SyscallPseudoReturnReg, 99); //PID
+ return 100;
+}
+
+SyscallReturn
+getppidFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ return 99;
+}
+
+SyscallReturn
+getuidFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ return 100; // UID
+}
+
+SyscallReturn
+geteuidFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ return 100; // UID
+}
+
+SyscallReturn
+getgidFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ return 100;
+}
+
+SyscallReturn
+getegidFunc(SyscallDesc *desc, int callnum, Process *process,
+ ExecContext *xc)
+{
+ return 100;
+}
+
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 06:08:56 +0000