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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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b428b51ed9
Fix commit 5f4c6bc1f369f20807a8e753c2308d1629478c61: it spits out warnings about missing syscall prototype (it is in <unistd.h>) and it does not recognize that two uses of _syscallX are to be resolved against kernel headers in the source tree, not against _syscallX; they in fact do not compile and would not work anyway. If _syscallX macros will be removed from the kernel tree altogether, the only reasonable solution for that piece of code is switching to open-coded inline assembly (it's remapping the whole executable from memory, except the page containing this code). Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
26 lines
572 B
C
26 lines
572 B
C
/*
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* Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#include <linux/mman.h>
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#include <asm/unistd.h>
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static int errno;
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static inline _syscall2(int,munmap,void *,start,size_t,len)
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static inline _syscall6(void *,mmap,void *,addr,size_t,len,int,prot,int,flags,int,fd,off_t,offset)
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int switcheroo(int fd, int prot, void *from, void *to, int size)
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{
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if(munmap(to, size) < 0){
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return(-1);
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}
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if(mmap(to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) == (void*) -1){
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return(-1);
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}
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if(munmap(from, size) < 0){
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return(-1);
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}
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return(0);
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}
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