07bf731e4b
Change syscall-stub's data to include a "expected retval". Stub now checks syscalls retval and aborts execution of syscall list, if retval != expected retval. run_syscall_stub prints the data of the failed syscall, using the data pointer and retval written by the stub to the beginning of the stack. one_syscall_stub is removed, to simplify code, because only some instructions are saved by one_syscall_stub, no host-syscall. Using the stub with additional data (modify_ldt via stub) is prepared also. Signed-off-by: Bodo Stroesser <bstroesser@fujitsu-siemens.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
99 lines
2.3 KiB
C
99 lines
2.3 KiB
C
/*
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* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
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* Copyright 2003 PathScale, Inc.
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* Licensed under the GPL
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*/
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#include "linux/stddef.h"
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#include "linux/sched.h"
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#include "linux/config.h"
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#include "linux/mm.h"
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#include "asm/page.h"
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#include "asm/pgtable.h"
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#include "asm/mmu.h"
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#include "user_util.h"
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#include "mem_user.h"
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#include "mem.h"
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#include "skas.h"
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#include "os.h"
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#include "tlb.h"
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static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last,
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int finished, void **flush)
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{
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struct host_vm_op *op;
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int i, ret = 0;
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for(i = 0; i <= last && !ret; i++){
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op = &ops[i];
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switch(op->type){
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case MMAP:
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ret = map(&mmu->skas.id, op->u.mmap.addr,
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op->u.mmap.len, op->u.mmap.r, op->u.mmap.w,
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op->u.mmap.x, op->u.mmap.fd,
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op->u.mmap.offset, finished, flush);
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break;
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case MUNMAP:
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ret = unmap(&mmu->skas.id,
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(void *) op->u.munmap.addr,
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op->u.munmap.len, finished, flush);
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break;
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case MPROTECT:
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ret = protect(&mmu->skas.id, op->u.mprotect.addr,
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op->u.mprotect.len, op->u.mprotect.r,
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op->u.mprotect.w, op->u.mprotect.x,
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finished, flush);
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break;
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default:
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printk("Unknown op type %d in do_ops\n", op->type);
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break;
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}
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}
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return ret;
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}
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extern int proc_mm;
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static void fix_range(struct mm_struct *mm, unsigned long start_addr,
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unsigned long end_addr, int force)
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{
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if(!proc_mm && (end_addr > CONFIG_STUB_START))
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end_addr = CONFIG_STUB_START;
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fix_range_common(mm, start_addr, end_addr, force, do_ops);
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}
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void __flush_tlb_one_skas(unsigned long addr)
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{
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flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE);
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}
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void flush_tlb_range_skas(struct vm_area_struct *vma, unsigned long start,
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unsigned long end)
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{
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if(vma->vm_mm == NULL)
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flush_tlb_kernel_range_common(start, end);
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else fix_range(vma->vm_mm, start, end, 0);
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}
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void flush_tlb_mm_skas(struct mm_struct *mm)
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{
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unsigned long end;
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/* Don't bother flushing if this address space is about to be
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* destroyed.
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*/
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if(atomic_read(&mm->mm_users) == 0)
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return;
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end = proc_mm ? task_size : CONFIG_STUB_START;
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fix_range(mm, 0, end, 0);
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}
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void force_flush_all_skas(void)
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{
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unsigned long end = proc_mm ? task_size : CONFIG_STUB_START;
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fix_range(current->mm, 0, end, 1);
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}
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