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preloader: Workaround for broken no-exec protections. 

Add an executable page at the top of the address space to defeat
broken no-exec protections that play with the code selector limit.
This commit is contained in:
Alexandre Julliard 2006-04-12 19:53:16 +02:00
parent e55c44c737
commit 0216c404dc
1 changed files with 4 additions and 0 deletions
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4
loader/preloader.c
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@ -949,6 +949,10 @@ void* wld_start( void **stack )
wld_mmap( preload_info[i].addr, preload_info[i].size,
PROT_NONE, MAP_FIXED | MAP_PRIVATE | MAP_ANON | MAP_NORESERVE, -1, 0 );
/* add an executable page at the top of the address space to defeat
* broken no-exec protections that play with the code selector limit */
wld_mprotect( (char *)0x80000000 - page_size, page_size, PROT_EXEC | PROT_READ );
/* load the main binary */
map_so_lib( argv[1], &main_binary_map );