diff options
Diffstat (limited to 'arch/um/kernel/trap.c')
| -rw-r--r-- | arch/um/kernel/trap.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c index ac70fa5a2e2a..b5f124a2f6ae 100644 --- a/arch/um/kernel/trap.c +++ b/arch/um/kernel/trap.c @@ -8,7 +8,6 @@ #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" @@ -120,7 +119,7 @@ out_nosemaphore: * 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); @@ -140,14 +139,6 @@ void segv_handler(int sig, union uml_pt_regs *regs) 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 @@ -227,9 +218,16 @@ void bad_segv(struct faultinfo fi, unsigned long ip) 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); } @@ -246,6 +244,15 @@ void winch(int sig, union uml_pt_regs *regs) 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) { } |