diff options
author | Christoph Hellwig <hch@hera.kernel.org> | 2005-05-27 01:16:24 -0700 |
---|---|---|
committer | Christoph Hellwig <hch@melbourne.sgi.com> | 2005-05-27 01:16:24 -0700 |
commit | b19312c4c8f3f84da57bba01d45549df1cf10dcd (patch) | |
tree | 1c34ce89be6b4e257bc03026d0268deb17727044 /arch/um/kernel/trap_kern.c | |
parent | d3870398fafd4911bd84573b78be4b6b762f32b0 (diff) | |
parent | 4ec5240ec367a592834385893200dd4fb369354c (diff) | |
download | op-kernel-dev-b19312c4c8f3f84da57bba01d45549df1cf10dcd.zip op-kernel-dev-b19312c4c8f3f84da57bba01d45549df1cf10dcd.tar.gz |
Merge with /pub/scm/linux/kernel/git/torvalds/linux-2.6.git
Diffstat (limited to 'arch/um/kernel/trap_kern.c')
-rw-r--r-- | arch/um/kernel/trap_kern.c | 38 |
1 files changed, 5 insertions, 33 deletions
diff --git a/arch/um/kernel/trap_kern.c b/arch/um/kernel/trap_kern.c index 54e2ec3..1de22d8 100644 --- a/arch/um/kernel/trap_kern.c +++ b/arch/um/kernel/trap_kern.c @@ -48,7 +48,7 @@ int handle_page_fault(unsigned long address, unsigned long ip, goto good_area; else if(!(vma->vm_flags & VM_GROWSDOWN)) goto out; - else if(!ARCH_IS_STACKGROW(address)) + else if(is_user && !ARCH_IS_STACKGROW(address)) goto out; else if(expand_stack(vma, address)) goto out; @@ -57,10 +57,11 @@ int handle_page_fault(unsigned long address, unsigned long ip, *code_out = SEGV_ACCERR; if(is_write && !(vma->vm_flags & VM_WRITE)) goto out; + + if(!(vma->vm_flags & (VM_READ | VM_EXEC))) + goto out; + page = address & PAGE_MASK; - pgd = pgd_offset(mm, page); - pud = pud_offset(pgd, page); - pmd = pmd_offset(pud, page); do { survive: switch (handle_mm_fault(mm, vma, address, is_write)){ @@ -106,33 +107,6 @@ out_of_memory: goto out; } -LIST_HEAD(physmem_remappers); - -void register_remapper(struct remapper *info) -{ - list_add(&info->list, &physmem_remappers); -} - -static int check_remapped_addr(unsigned long address, int is_write) -{ - struct remapper *remapper; - struct list_head *ele; - __u64 offset; - int fd; - - fd = phys_mapping(__pa(address), &offset); - if(fd == -1) - return(0); - - list_for_each(ele, &physmem_remappers){ - remapper = list_entry(ele, struct remapper, list); - if((*remapper->proc)(fd, address, is_write, offset)) - return(1); - } - - return(0); -} - /* * We give a *copy* of the faultinfo in the regs to segv. * This must be done, since nesting SEGVs could overwrite @@ -151,8 +125,6 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user, void *sc) flush_tlb_kernel_vm(); return(0); } - else if(check_remapped_addr(address & PAGE_MASK, is_write)) - return(0); else if(current->mm == NULL) panic("Segfault with no mm"); err = handle_page_fault(address, ip, is_write, is_user, &si.si_code); |