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x86, vdso: Move the 32-bit vdso special pages after the text

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This unifies the vdso mapping code and teaches it how to map special
pages at addresses corresponding to symbols in the vdso image.  The
new code is used for all vdso variants, but so far only the 32-bit
variants use the new vvar page position.

Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Link: http://lkml.kernel.org/r/b6d7858ad7b5ac3fd3c29cab6d6d769bc45d195e.1399317206.git.luto@amacapital.net
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Andy Lutomirski
2014-05-05 12:19:35 -07:00
committed by H. Peter Anvin
parent 6f121e548f
commit 18d0a6fd22
8 changed files with 177 additions and 170 deletions
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4
arch/x86/include/asm/vdso.h
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@@ -14,6 +14,10 @@ struct vdso_image {
unsigned long alt, alt_len;
unsigned long sym_end_mapping; /* Total size of the mapping */
unsigned long sym_vvar_page;
unsigned long sym_hpet_page;
unsigned long sym_VDSO32_NOTE_MASK;
unsigned long sym___kernel_sigreturn;
unsigned long sym___kernel_rt_sigreturn;