int
linux_sys_openat(struct lwp *l, const struct linux_sys_openat_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(const char *) path;
syscallarg(int) flags;
syscallarg(linux_umode_t) mode;
} */
int error, fl;
struct sys_openat_args boa;
fl = linux_to_bsd_ioflags(SCARG(uap, flags));
SCARG(&boa, fd) = SCARG(uap, fd);
SCARG(&boa, path) = SCARG(uap, path);
SCARG(&boa, oflags) = fl;
SCARG(&boa, mode) = SCARG(uap, mode);
if ((error = sys_openat(l, &boa, retval)))
return (error == EFTYPE) ? ELOOP : error;
linux_open_ctty(l, fl, *retval);
return 0;
}
int openat(int dirfd, const char* path, int flags, ...)
{
mode_t mode = 0;
if ( flags & O_CREAT )
{
va_list ap;
va_start(ap, flags);
mode = va_arg(ap, mode_t);
va_end(ap);
}
return sys_openat(dirfd, path, flags, mode);
}
uint32_t translate_sys_openat(const struct sys_state *sys, uint32_t *args)
{
int dirfd = args[0];
const char *pathname = sys->mem_base + args[1];
int flags, flags_ok;
mode_t mode = args[3];
flags = f2b_open_flags(args[2], &flags_ok);
if (!flags_ok) {
debug("Unrecognised open flags 0x%x\n", args[2]);
return -FRONT_EINVAL;
}
return sys_openat(dirfd, pathname, flags, mode);
}
int handle_frontend_syscall(HTIFState *htifstate, uint64_t payload) {
uint64_t mm[8];
int i;
void * base = htifstate->main_mem_ram_ptr + (uintptr_t)payload;
for (i = 0; i < 8; i++) {
mm[i] = ldq_p((void*)(base + i*8));
}
#ifdef DEBUG_FRONTEND_RISCV
for (i = 0; i < 8; i++) {
fprintf(stderr, "elem %d, val 0x%016lx\n", i, mm[i]);
}
#endif
uint64_t retval = -1;
switch(mm[0]) {
case RV_FSYSCALL_sys_openat:
retval = sys_openat(htifstate, mm[1], mm[2], mm[3], mm[4], mm[5]);
break;
case RV_FSYSCALL_sys_close:
retval = sys_close(htifstate, mm[1]);
break;
case RV_FSYSCALL_sys_write:
retval = sys_write(htifstate, mm[1], mm[2], mm[3]);
break;
case RV_FSYSCALL_sys_pread:
retval = sys_pread(htifstate, mm[1], mm[2], mm[3], mm[4]);
break;
case RV_FSYSCALL_sys_exit:
retval = sys_exit(htifstate, mm[1]);
break;
case RV_FSYSCALL_sys_getmainvars:
retval = sys_getmainvars(htifstate, mm[1], mm[2]);
break;
default:
fprintf(stderr, "FRONTEND SYSCALL %ld NOT IMPLEMENTED\n", mm[0]);
exit(1);
}
// write retval to mm
stq_p((void*)base, retval);
return 1;
}
int sys_open(const char* name, int flags, int mode)
{
return sys_openat(AT_FDCWD, name, flags, mode);
}
