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x86: make TASK_SIZE_MAX usable from assembly code
For 64-bit the only thing missing was a strategic _AC, and for 32-bit we need to use __PAGE_OFFSET instead of PAGE_OFFSET in the TASK_SIZE definition to escape the explicit unsigned long cast. This just works because __PAGE_OFFSET is defined using _AC itself and thus never needs the cast anyway. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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2 changed files with 3 additions and 3 deletions
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/*
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* User space process size: 3GB (default).
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*/
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#define IA32_PAGE_OFFSET PAGE_OFFSET
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#define TASK_SIZE PAGE_OFFSET
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#define IA32_PAGE_OFFSET __PAGE_OFFSET
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#define TASK_SIZE __PAGE_OFFSET
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#define TASK_SIZE_LOW TASK_SIZE
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#define TASK_SIZE_MAX TASK_SIZE
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#define DEFAULT_MAP_WINDOW TASK_SIZE
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@ -76,7 +76,7 @@
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*
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* With page table isolation enabled, we map the LDT in ... [stay tuned]
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*/
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#define TASK_SIZE_MAX ((1UL << __VIRTUAL_MASK_SHIFT) - PAGE_SIZE)
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#define TASK_SIZE_MAX ((_AC(1,UL) << __VIRTUAL_MASK_SHIFT) - PAGE_SIZE)
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#define DEFAULT_MAP_WINDOW ((1UL << 47) - PAGE_SIZE)
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