summaryrefslogtreecommitdiff
path: root/src/sim/syscall_emul.cc
diff options
context:
space:
mode:
Diffstat (limited to 'src/sim/syscall_emul.cc')
-rw-r--r--src/sim/syscall_emul.cc33
1 files changed, 33 insertions, 0 deletions
diff --git a/src/sim/syscall_emul.cc b/src/sim/syscall_emul.cc
index ab44c0a35..876f39e99 100644
--- a/src/sim/syscall_emul.cc
+++ b/src/sim/syscall_emul.cc
@@ -184,6 +184,39 @@ lseekFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
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);
+
+ uint64_t offset = (offset_high << 32) | offset_low;
+
+ uint64_t result = lseek(fd, offset, whence);
+ result = TheISA::htog(result);
+
+ if (result == (off_t)-1) {
+ //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
+ BufferArg result_buf(result_ptr, sizeof(result));
+ memcpy(result_buf.bufferPtr(), &result, sizeof(result));
+ result_buf.copyOut(tc->getMemPort());
+ return 0;
+ }
+
+
+ return (result == (off_t)-1) ? -errno : result;
+}
+
+
+SyscallReturn
munmapFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
{
// given that we don't really implement mmap, munmap is really easy