#include "linux/sched.h"
#include "linux/mm.h"
#include "linux/spinlock.h"
-#include "linux/config.h"
#include "linux/init.h"
#include "linux/ptrace.h"
#include "asm/semaphore.h"
* us unable to handle the page fault gracefully.
*/
out_of_memory:
- if (current->pid == 1) {
+ if (is_init(current)) {
up_read(&mm->mmap_sem);
yield();
down_read(&mm->mmap_sem);
segv(*fi, UPT_IP(regs), UPT_IS_USER(regs), regs);
}
-struct kern_handlers handlinfo_kern = {
- .relay_signal = relay_signal,
- .winch = winch,
- .bus_handler = relay_signal,
- .page_fault = segv_handler,
- .sigio_handler = sigio_handler,
- .timer_handler = timer_handler
-};
/*
* We give a *copy* of the faultinfo in the regs to segv.
* This must be done, since nesting SEGVs could overwrite
void relay_signal(int sig, union uml_pt_regs *regs)
{
- if(arch_handle_signal(sig, regs)) return;
- if(!UPT_IS_USER(regs))
+ if(arch_handle_signal(sig, regs))
+ return;
+
+ if(!UPT_IS_USER(regs)){
+ if(sig == SIGBUS)
+ printk("Bus error - the /dev/shm or /tmp mount likely "
+ "just ran out of space\n");
panic("Kernel mode signal %d", sig);
+ }
+
current->thread.arch.faultinfo = *UPT_FAULTINFO(regs);
force_sig(sig, current);
}
do_IRQ(WINCH_IRQ, regs);
}
+const struct kern_handlers handlinfo_kern = {
+ .relay_signal = relay_signal,
+ .winch = winch,
+ .bus_handler = bus_handler,
+ .page_fault = segv_handler,
+ .sigio_handler = sigio_handler,
+ .timer_handler = timer_handler
+};
+
void trap_init(void)
{
}