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[PATCH] uml: x86_64 fixes

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This fixes some x86_64 bugs -

- maybe_map returns -1 on error instead of 0, which is interpreted as
  physical address 0

- removed an include of ipc.h, which isn't needed

- fixed the calculation of signal frame location

- the signal delivery code is now immune to the stack expansion check

- added a missing include

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jeff Dike
2005-05-06 21:30:55 -07:00
committed by Linus Torvalds
parent 0f7e663dea
commit 2d58cc9a43
5 changed files with 9 additions and 5 deletions
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7
arch/um/kernel/skas/uaccess.c
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@ -29,9 +29,12 @@ static unsigned long maybe_map(unsigned long virt, int is_write)
if(IS_ERR(phys) || (is_write && !pte_write(pte))){
err = handle_page_fault(virt, 0, is_write, 1, &dummy_code);
if(err)
return(0);
return(-1UL);
phys = um_virt_to_phys(current, virt, NULL);
}
if(IS_ERR(phys))
phys = (void *) -1;
return((unsigned long) phys);
}
@ -42,7 +45,7 @@ static int do_op(unsigned long addr, int len, int is_write,
int n;
addr = maybe_map(addr, is_write);
if(addr == -1)
if(addr == -1UL)
return(-1);
page = phys_to_page(addr);