void sig_handler(ARCH_SIGHDLR_PARAM)
{
struct sigcontext *sc;
int enabled;
/* Must be the first thing that this handler does - x86_64 stores
* the sigcontext in %rdx, and we need to save it before it has a
* chance to get trashed.
*/
ARCH_GET_SIGCONTEXT(sc, sig);
enabled = signals_enabled;
if(!enabled && (sig == SIGIO)){
pending |= SIGIO_MASK;
return;
}
block_signals();
CHOOSE_MODE_PROC(sig_handler_common_tt, sig_handler_common_skas,
sig, sc);
set_signals(enabled);
}
void sig_handler(int sig)
{
struct sigcontext *sc;
ARCH_GET_SIGCONTEXT(sc, sig);
CHOOSE_MODE_PROC(sig_handler_common_tt, sig_handler_common_skas,
sig, sc);
}
void alarm_handler(int sig, struct sigcontext sc)
{
if(!timer_irq_inited) return;
if(sig == SIGALRM)
switch_timers(0);
CHOOSE_MODE_PROC(sig_handler_common_tt, sig_handler_common_skas,
sig, &sc);
if(sig == SIGALRM)
switch_timers(1);
}
void alarm_handler(int sig)
{
struct sigcontext *sc;
ARCH_GET_SIGCONTEXT(sc, sig);
if(!timer_irq_inited) return;
if(sig == SIGALRM)
switch_timers(0);
CHOOSE_MODE_PROC(sig_handler_common_tt, sig_handler_common_skas,
sig, sc);
if(sig == SIGALRM)
switch_timers(1);
}
static void real_alarm_handler(int sig, struct sigcontext *sc)
{
if(!timer_irq_inited){
signals_enabled = 1;
return;
}
if(sig == SIGALRM)
switch_timers(0);
CHOOSE_MODE_PROC(sig_handler_common_tt, sig_handler_common_skas,
sig, sc);
if(sig == SIGALRM)
switch_timers(1);
}
unsigned long thread_saved_pc(struct task_struct *task)
{
return(os_process_pc(CHOOSE_MODE_PROC(thread_pid_tt, thread_pid_skas,
task)));
}
int linux_main(int argc, char **argv)
{
unsigned long avail, diff;
unsigned long virtmem_size, max_physmem;
unsigned int i, add;
for (i = 1; i < argc; i++){
if((i == 1) && (argv[i][0] == ' ')) continue;
add = 1;
uml_checksetup(argv[i], &add);
if(add) add_arg(saved_command_line, argv[i]);
}
if(have_root == 0) add_arg(saved_command_line, DEFAULT_COMMAND_LINE);
mode_tt = force_tt ? 1 : !can_do_skas();
#ifndef CONFIG_MODE_TT
if (mode_tt) {
/*Since CONFIG_MODE_TT is #undef'ed, force_tt cannot be 1. So,
* can_do_skas() returned 0, and the message is correct. */
printf("Support for TT mode is disabled, and no SKAS support is present on the host.\n");
exit(1);
}
#endif
uml_start = CHOOSE_MODE_PROC(set_task_sizes_tt, set_task_sizes_skas, 0,
&host_task_size, &task_size);
/* Need to check this early because mmapping happens before the
* kernel is running.
*/
check_tmpexec();
brk_start = (unsigned long) sbrk(0);
CHOOSE_MODE_PROC(before_mem_tt, before_mem_skas, brk_start);
/* Increase physical memory size for exec-shield users
so they actually get what they asked for. This should
add zero for non-exec shield users */
diff = UML_ROUND_UP(brk_start) - UML_ROUND_UP(&_end);
if(diff > 1024 * 1024){
printf("Adding %ld bytes to physical memory to account for "
"exec-shield gap\n", diff);
physmem_size += UML_ROUND_UP(brk_start) - UML_ROUND_UP(&_end);
}
uml_physmem = uml_start;
/* Reserve up to 4M after the current brk */
uml_reserved = ROUND_4M(brk_start) + (1 << 22);
setup_machinename(system_utsname.machine);
#ifdef CONFIG_MODE_TT
argv1_begin = argv[1];
argv1_end = &argv[1][strlen(argv[1])];
#endif
highmem = 0;
iomem_size = (iomem_size + PAGE_SIZE - 1) & PAGE_MASK;
max_physmem = get_kmem_end() - uml_physmem - iomem_size - MIN_VMALLOC;
/* Zones have to begin on a 1 << MAX_ORDER page boundary,
* so this makes sure that's true for highmem
*/
max_physmem &= ~((1 << (PAGE_SHIFT + MAX_ORDER)) - 1);
if(physmem_size + iomem_size > max_physmem){
highmem = physmem_size + iomem_size - max_physmem;
physmem_size -= highmem;
#ifndef CONFIG_HIGHMEM
highmem = 0;
printf("CONFIG_HIGHMEM not enabled - physical memory shrunk "
"to %ld bytes\n", physmem_size);
#endif
}
high_physmem = uml_physmem + physmem_size;
end_iomem = high_physmem + iomem_size;
high_memory = (void *) end_iomem;
start_vm = VMALLOC_START;
setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem);
if(init_maps(physmem_size, iomem_size, highmem)){
printf("Failed to allocate mem_map for %ld bytes of physical "
"memory and %ld bytes of highmem\n", physmem_size,
highmem);
exit(1);
}
virtmem_size = physmem_size;
avail = get_kmem_end() - start_vm;
if(physmem_size > avail) virtmem_size = avail;
end_vm = start_vm + virtmem_size;
if(virtmem_size < physmem_size)
printf("Kernel virtual memory size shrunk to %ld bytes\n",
virtmem_size);
uml_postsetup();
task_protections((unsigned long) &init_thread_info);
os_flush_stdout();
return(CHOOSE_MODE(start_uml_tt(), start_uml_skas()));
}
void sig_handler(int sig, struct sigcontext sc)
{
CHOOSE_MODE_PROC(sig_handler_common_tt, sig_handler_common_skas,
sig, &sc);
}
void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
{
CHOOSE_MODE_PROC(start_thread_tt, start_thread_skas, regs, eip, esp);
}
static inline int external_pid(struct task_struct *task)
{
return CHOOSE_MODE_PROC(external_pid_tt, external_pid_skas, task);
}
void flush_tlb_mm(struct mm_struct *mm)
{
CHOOSE_MODE_PROC(flush_tlb_mm_tt, flush_tlb_mm_skas, mm);
}
void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end)
{
CHOOSE_MODE_PROC(flush_tlb_range_tt, flush_tlb_range_skas, vma, start,
end);
}
void __flush_tlb_one(unsigned long addr)
{
CHOOSE_MODE_PROC(__flush_tlb_one_tt, __flush_tlb_one_skas, addr);
}
void flush_tlb_kernel_range(unsigned long start, unsigned long end)
{
CHOOSE_MODE_PROC(flush_tlb_kernel_range_tt,
flush_tlb_kernel_range_skas, start, end);
}
