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871da9a111
In commit c2271198, Laurent Dufour kindly reunified the VDSO code that had become duplicated between architectures. Unfortunately this introduced a regression in AArch64 where apparently due to the scope of vdso_symbols array of pointers to characters changing from local to global, load-time relocations became necessary. The following thread on the GCC mailing list discusses why load-time relocations can be necessary when pointers are used, although it doesn't mention the potential for locally scoped arrays to be handled differently: https://gcc.gnu.org/ml/gcc/2004-05/msg01016.html Because the alternatives, such as porting piegen to AArch64, are far more involved, simply revert the change in scope. Signed-off-by: Christopher Covington <cov@codeaurora.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
#ifndef __CR_UTIL_VDSO_H__
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#define __CR_UTIL_VDSO_H__
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/*
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* VDSO management common definitions.
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*
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* This header file is included by the criu main code and the parasite code.
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* It contains definitions shared by these 2 parts.
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*
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* This file should not be included except in pie/util-vdso.c, include/vdso.h
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* and include/parasite-vdso.h
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*/
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#include <sys/types.h>
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/*
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* Each architecture must export:
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* VDSO_SYMBOL_MAX, the number of vDSO symbols to manage
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* ARCH_VDSO_SYMBOLS, a table of string containing the vDSO symbol names
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* vdso_redirect_calls, a service called to redirect the vDSO symbols in
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* the parasite code.
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*/
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#include "asm/vdso.h"
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struct vdso_symbol {
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char name[32];
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unsigned long offset;
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};
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struct vdso_symtable {
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unsigned long vma_start;
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unsigned long vma_end;
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unsigned long vvar_start;
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unsigned long vvar_end;
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struct vdso_symbol symbols[VDSO_SYMBOL_MAX];
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};
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#define VDSO_SYMBOL_INIT { .offset = VDSO_BAD_ADDR, }
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#define VDSO_SYMTABLE_INIT \
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{ \
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.vma_start = VDSO_BAD_ADDR, \
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.vma_end = VDSO_BAD_ADDR, \
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.vvar_start = VVAR_BAD_ADDR, \
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.vvar_end = VVAR_BAD_ADDR, \
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.symbols = { \
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[0 ... VDSO_SYMBOL_MAX - 1] = \
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(struct vdso_symbol)VDSO_SYMBOL_INIT, \
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}, \
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}
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/* Size of VMA associated with vdso */
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static inline unsigned long vdso_vma_size(struct vdso_symtable *t)
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{
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return t->vma_end - t->vma_start;
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}
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static inline unsigned long vvar_vma_size(struct vdso_symtable *t)
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{
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return t->vvar_end - t->vvar_start;
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}
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extern int vdso_fill_symtable(char *mem, size_t size, struct vdso_symtable *t);
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#endif /* __CR_UTIL_VDSO_H__ */
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