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| author | Anton Altaparmakov <aia21@cantab.net> | 2005-09-26 10:50:29 +0100 |
|---|---|---|
| committer | Anton Altaparmakov <aia21@cantab.net> | 2005-09-26 10:50:29 +0100 |
| commit | e8c2cd99a3933d93413910bc93cbd5b53177110b (patch) | |
| tree | ea4c1d63b1bdeb9ef1aacacad0ac9c7dc0768fdc /arch/um/kernel/trap_kern.c | |
| parent | 5a8c0cc32bb6e029cd9c36f655c6b0955b0d9967 (diff) | |
| parent | 8ddec7460d2f5db3ac35812c03676b1473d1d668 (diff) | |
Merge branch 'master' of /home/src/linux-2.6/
Diffstat (limited to 'arch/um/kernel/trap_kern.c')
| -rw-r--r-- | arch/um/kernel/trap_kern.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/arch/um/kernel/trap_kern.c b/arch/um/kernel/trap_kern.c index 87cc6fd76ced..d297429ac360 100644 --- a/arch/um/kernel/trap_kern.c +++ b/arch/um/kernel/trap_kern.c @@ -18,6 +18,7 @@ #include "asm/a.out.h" #include "asm/current.h" #include "asm/irq.h" +#include "sysdep/sigcontext.h" #include "user_util.h" #include "kern_util.h" #include "kern.h" @@ -39,6 +40,12 @@ int handle_page_fault(unsigned long address, unsigned long ip, int err = -EFAULT; *code_out = SEGV_MAPERR; + + /* If the fault was during atomic operation, don't take the fault, just + * fail. */ + if (in_atomic()) + goto out_nosemaphore; + down_read(&mm->mmap_sem); vma = find_vma(mm, address); if(!vma) @@ -89,6 +96,7 @@ survive: flush_tlb_page(vma, address); out: up_read(&mm->mmap_sem); +out_nosemaphore: return(err); /* @@ -125,7 +133,15 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user, void *sc) } else if(current->mm == NULL) panic("Segfault with no mm"); - err = handle_page_fault(address, ip, is_write, is_user, &si.si_code); + + if (SEGV_IS_FIXABLE(&fi)) + err = handle_page_fault(address, ip, is_write, is_user, &si.si_code); + else { + err = -EFAULT; + /* A thread accessed NULL, we get a fault, but CR2 is invalid. + * This code is used in __do_copy_from_user() of TT mode. */ + address = 0; + } catcher = current->thread.fault_catcher; if(!err) |