diff options
Diffstat (limited to 'arch/um/kernel')
| -rw-r--r-- | arch/um/kernel/exec.c | 2 | ||||
| -rw-r--r-- | arch/um/kernel/ksyms.c | 2 | ||||
| -rw-r--r-- | arch/um/kernel/mem.c | 4 | ||||
| -rw-r--r-- | arch/um/kernel/process.c | 4 | ||||
| -rw-r--r-- | arch/um/kernel/skas/mmu.c | 5 | ||||
| -rw-r--r-- | arch/um/kernel/um_arch.c | 16 |
6 files changed, 23 insertions, 10 deletions
diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c index 76a62c0cb2b..f5d7f4569ba 100644 --- a/arch/um/kernel/exec.c +++ b/arch/um/kernel/exec.c @@ -25,7 +25,7 @@ void flush_thread(void) ret = unmap(¤t->mm->context.id, 0, STUB_START, 0, &data); ret = ret || unmap(¤t->mm->context.id, STUB_END, - TASK_SIZE - STUB_END, 1, &data); + host_task_size - STUB_END, 1, &data); if (ret) { printk(KERN_ERR "flush_thread - clearing address space failed, " "err = %d\n", ret); diff --git a/arch/um/kernel/ksyms.c b/arch/um/kernel/ksyms.c index 5311ee93ede..66e2a305a8d 100644 --- a/arch/um/kernel/ksyms.c +++ b/arch/um/kernel/ksyms.c @@ -5,7 +5,6 @@ #include "linux/module.h" #include "linux/syscalls.h" -#include "asm/a.out.h" #include "asm/tlbflush.h" #include "asm/uaccess.h" #include "as-layout.h" @@ -60,7 +59,6 @@ EXPORT_SYMBOL(os_accept_connection); EXPORT_SYMBOL(os_rcv_fd); EXPORT_SYMBOL(run_helper); EXPORT_SYMBOL(start_thread); -EXPORT_SYMBOL(dump_thread); #ifdef CONFIG_SMP diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c index d872fdce1d7..2627ce82e91 100644 --- a/arch/um/kernel/mem.c +++ b/arch/um/kernel/mem.c @@ -354,11 +354,13 @@ pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) return pte; } -struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address) +pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address) { struct page *pte; pte = alloc_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO); + if (pte) + pgtable_page_ctor(pte); return pte; } diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c index c07961bedb7..fc50d2f959d 100644 --- a/arch/um/kernel/process.c +++ b/arch/um/kernel/process.c @@ -258,10 +258,6 @@ void cpu_idle(void) default_idle(); } -void dump_thread(struct pt_regs *regs, struct user *u) -{ -} - int __cant_sleep(void) { return in_atomic() || irqs_disabled() || in_interrupt(); /* Is in_interrupt() really needed? */ diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c index 78b3e9f69d5..0cd9a7a05e7 100644 --- a/arch/um/kernel/skas/mmu.c +++ b/arch/um/kernel/skas/mmu.c @@ -91,6 +91,8 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm) goto out_free; } + to_mm->stub_pages = NULL; + return 0; out_free: @@ -126,6 +128,7 @@ void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm) pages[0] = virt_to_page(&__syscall_stub_start); pages[1] = virt_to_page(mm->context.id.stack); + mm->context.stub_pages = pages; /* dup_mmap already holds mmap_sem */ err = install_special_mapping(mm, STUB_START, STUB_END - STUB_START, @@ -147,6 +150,8 @@ void arch_exit_mmap(struct mm_struct *mm) { pte_t *pte; + if (mm->context.stub_pages != NULL) + kfree(mm->context.stub_pages); pte = virt_to_pte(mm, STUB_CODE); if (pte != NULL) pte_clear(mm, STUB_CODE, pte); diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c index 468aba990db..a6c1dd1cf5a 100644 --- a/arch/um/kernel/um_arch.c +++ b/arch/um/kernel/um_arch.c @@ -241,6 +241,11 @@ static struct notifier_block panic_exit_notifier = { }; /* Set during early boot */ +unsigned long task_size; +EXPORT_SYMBOL(task_size); + +unsigned long host_task_size; + unsigned long brk_start; unsigned long end_iomem; EXPORT_SYMBOL(end_iomem); @@ -267,6 +272,13 @@ int __init linux_main(int argc, char **argv) if (have_root == 0) add_arg(DEFAULT_COMMAND_LINE); + host_task_size = os_get_task_size(); + /* + * TASK_SIZE needs to be PGDIR_SIZE aligned or else exit_mmap craps + * out + */ + task_size = host_task_size & PGDIR_MASK; + /* OS sanity checks that need to happen before the kernel runs */ os_early_checks(); @@ -303,7 +315,7 @@ int __init linux_main(int argc, char **argv) highmem = 0; iomem_size = (iomem_size + PAGE_SIZE - 1) & PAGE_MASK; - max_physmem = CONFIG_TOP_ADDR - uml_physmem - iomem_size - MIN_VMALLOC; + max_physmem = TASK_SIZE - uml_physmem - iomem_size - MIN_VMALLOC; /* * Zones have to begin on a 1 << MAX_ORDER page boundary, @@ -335,7 +347,7 @@ int __init linux_main(int argc, char **argv) } virtmem_size = physmem_size; - avail = CONFIG_TOP_ADDR - start_vm; + avail = TASK_SIZE - start_vm; if (physmem_size > avail) virtmem_size = avail; end_vm = start_vm + virtmem_size; |