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24a295e4ef
While the GCC and Clang compilers already define __ASSEMBLER__ automatically when compiling assembly code, __ASSEMBLY__ is a macro that only gets defined by the Makefiles in the kernel. This can be very confusing when switching between userspace and kernelspace coding, or when dealing with UAPI headers that rather should use __ASSEMBLER__ instead. So let's standardize on the __ASSEMBLER__ macro that is provided by the compilers now. This is mostly a mechanical patch (done with a simple "sed -i" statement), with some manual tweaks in <asm/frame.h>, <asm/hw_irq.h> and <asm/setup.h> that mentioned this macro in comments with some missing underscores. Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Brian Gerst <brgerst@gmail.com> Cc: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/20250314071013.1575167-38-thuth@redhat.com
53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
#ifndef _ASM_X86_PGTABLE_32_AREAS_H
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#define _ASM_X86_PGTABLE_32_AREAS_H
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#include <asm/cpu_entry_area.h>
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/*
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* Just any arbitrary offset to the start of the vmalloc VM area: the
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* current 8MB value just means that there will be a 8MB "hole" after the
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* physical memory until the kernel virtual memory starts. That means that
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* any out-of-bounds memory accesses will hopefully be caught.
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* The vmalloc() routines leaves a hole of 4kB between each vmalloced
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* area for the same reason. ;)
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*/
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#define VMALLOC_OFFSET (8 * 1024 * 1024)
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#ifndef __ASSEMBLER__
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extern bool __vmalloc_start_set; /* set once high_memory is set */
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#endif
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#define VMALLOC_START ((unsigned long)high_memory + VMALLOC_OFFSET)
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#ifdef CONFIG_X86_PAE
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#define LAST_PKMAP 512
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#else
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#define LAST_PKMAP 1024
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#endif
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#define CPU_ENTRY_AREA_PAGES (NR_CPUS * DIV_ROUND_UP(sizeof(struct cpu_entry_area), PAGE_SIZE))
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/* The +1 is for the readonly IDT page: */
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#define CPU_ENTRY_AREA_BASE \
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((FIXADDR_TOT_START - PAGE_SIZE*(CPU_ENTRY_AREA_PAGES+1)) & PMD_MASK)
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#define LDT_BASE_ADDR \
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((CPU_ENTRY_AREA_BASE - PAGE_SIZE) & PMD_MASK)
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#define LDT_END_ADDR (LDT_BASE_ADDR + PMD_SIZE)
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#define PKMAP_BASE \
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((LDT_BASE_ADDR - PAGE_SIZE) & PMD_MASK)
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#ifdef CONFIG_HIGHMEM
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# define VMALLOC_END (PKMAP_BASE - 2 * PAGE_SIZE)
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#else
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# define VMALLOC_END (LDT_BASE_ADDR - 2 * PAGE_SIZE)
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#endif
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#define MODULES_VADDR VMALLOC_START
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#define MODULES_END VMALLOC_END
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#define MODULES_LEN (MODULES_VADDR - MODULES_END)
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#define MAXMEM (VMALLOC_END - PAGE_OFFSET - __VMALLOC_RESERVE)
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#endif /* _ASM_X86_PGTABLE_32_AREAS_H */
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