static void
syscall_RSIM_transaction(RSIM_Thread *t, int callno)
{
int cmd = t->syscall_arg(0);
uint32_t regs_va = t->syscall_arg(1);
int result = -ENOSYS;
RSIM_Process *proc = t->get_process();
std::string transaction_name = "specimen-initiated transaction " + StringUtility::addrToString(regs_va);
switch (cmd) {
case 0: { // start
if (32 == t->get_process()->wordSize()) {
pt_regs_32 regs_guest = t->get_regs().get_pt_regs_32();
if (sizeof(regs_guest)!=proc->mem_write(®s_guest, regs_va, sizeof regs_guest)) {
result = -EFAULT;
} else {
result = proc->mem_transaction_start(transaction_name); // total number of transactions
assert(-1==result || result>0);
}
} else {
FIXME("[Robb P. Matzke 2015-05-28]: 64-bit not supported yet");
}
break;
}
case 1: { // rollback
if (32 == t->get_process()->wordSize()) {
pt_regs_32 regs_guest;
if (sizeof(regs_guest)!=proc->mem_read(®s_guest, regs_va, sizeof regs_guest)) {
result = -EFAULT;
} else if (0>=(result = t->get_process()->mem_transaction_rollback(transaction_name))) {
// error; don't initialize registers; this syscall will return without doing anything
if (0==result)
result = -EINVAL; // no such transaction
} else {
// success. The syscall will return as if we had called transaction start, but with zero to distinguish it
// from transaction start.
result = 0;
t->init_regs(PtRegs(regs_guest));
}
} else {
FIXME("[Robb P. Matzke 2015-05-28]: 64-bit not supported yet");
}
break;
}
case 2:
// not implemented yet
break;
}
t->syscall_return(result);
}
